CN113718182B - Zinc-aluminum coating invar steel single wire and preparation method thereof - Google Patents
Zinc-aluminum coating invar steel single wire and preparation method thereof Download PDFInfo
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- CN113718182B CN113718182B CN202111000833.4A CN202111000833A CN113718182B CN 113718182 B CN113718182 B CN 113718182B CN 202111000833 A CN202111000833 A CN 202111000833A CN 113718182 B CN113718182 B CN 113718182B
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- 229910001374 Invar Inorganic materials 0.000 title claims abstract description 408
- 229910000611 Zinc aluminium Inorganic materials 0.000 title claims abstract description 258
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 title claims abstract description 258
- 238000000576 coating method Methods 0.000 title claims abstract description 107
- 239000011248 coating agent Substances 0.000 title claims abstract description 106
- 238000002360 preparation method Methods 0.000 title description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 142
- 239000010959 steel Substances 0.000 claims abstract description 142
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 101
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 100
- 238000007747 plating Methods 0.000 claims abstract description 100
- 238000005266 casting Methods 0.000 claims abstract description 98
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 72
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000004804 winding Methods 0.000 claims abstract description 64
- 238000003723 Smelting Methods 0.000 claims abstract description 49
- 238000005096 rolling process Methods 0.000 claims abstract description 42
- 239000012535 impurity Substances 0.000 claims abstract description 40
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 37
- 239000011651 chromium Substances 0.000 claims abstract description 37
- 239000010941 cobalt Substances 0.000 claims abstract description 37
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 37
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 36
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 35
- 239000011733 molybdenum Substances 0.000 claims abstract description 35
- 229910052742 iron Inorganic materials 0.000 claims abstract description 34
- 239000002253 acid Substances 0.000 claims abstract description 31
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011701 zinc Substances 0.000 claims abstract description 26
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 26
- 238000004140 cleaning Methods 0.000 claims abstract description 19
- 238000002425 crystallisation Methods 0.000 claims abstract description 17
- 230000008025 crystallization Effects 0.000 claims abstract description 17
- 238000007598 dipping method Methods 0.000 claims abstract description 17
- 229910045601 alloy Inorganic materials 0.000 claims description 98
- 239000000956 alloy Substances 0.000 claims description 98
- 239000007789 gas Substances 0.000 claims description 82
- 239000010410 layer Substances 0.000 claims description 69
- 238000005246 galvanizing Methods 0.000 claims description 64
- 230000001681 protective effect Effects 0.000 claims description 64
- 239000007788 liquid Substances 0.000 claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 41
- 238000007670 refining Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 27
- 230000009471 action Effects 0.000 claims description 20
- 238000005554 pickling Methods 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 claims description 16
- 238000007664 blowing Methods 0.000 claims description 16
- 238000009749 continuous casting Methods 0.000 claims description 16
- 238000003618 dip coating Methods 0.000 claims description 16
- 230000005484 gravity Effects 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000011247 coating layer Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000003892 spreading Methods 0.000 claims description 2
- 230000007480 spreading Effects 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 15
- 238000005260 corrosion Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 22
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 16
- 239000000853 adhesive Substances 0.000 description 14
- 230000001070 adhesive effect Effects 0.000 description 14
- 239000002994 raw material Substances 0.000 description 14
- 238000005406 washing Methods 0.000 description 13
- 229910052786 argon Inorganic materials 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 239000004020 conductor Substances 0.000 description 7
- 239000007888 film coating Substances 0.000 description 6
- 238000009501 film coating Methods 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/042—Manufacture of coated wire or bars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention relates to a zinc-aluminum plating invar steel single wire, which comprises an invar steel core wire and a zinc-aluminum plating layer coated outside the invar steel core wire; the invar core wire comprises the following components: 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, less than or equal to 0.10wt% of other impurity elements and the balance of iron; the zinc-aluminum coating contains the following components: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of aluminum. The single line of the zinc-aluminum coating invar steel is obtained through the steps of molten steel smelting, casting crystallization, steel ingot rolling, blank drawing, steel wire acid cleaning, steel wire preheating, dipping coating, forming cooling, wire diameter detection and looping winding. The zinc-aluminum plating layer invar single wire has the advantages of small thermal expansion coefficient, high temperature resistance, high tensile strength, corrosion resistance and the like.
Description
Technical Field
The invention belongs to the technical field of overhead conductors, and particularly relates to a zinc-aluminum coating invar steel single wire and a preparation method thereof.
Background
With the rapid development of national economy, the demand for electric power is increasing day by day, and the performance requirements for power transmission and transformation wires are also improved. In order to increase the transmission capacity of the line, line replacement of part of the power line is also started — replacing with a transmission conductor with higher current carrying capacity. The common conveying wire is a common steel-cored aluminum strand, the aluminum wire plays a role in conducting, the steel core plays a role in bearing load, the ground safety of a line is influenced due to the large thermal expansion coefficient of the steel core in high-temperature operation, the high-temperature operation capacity of the wire is limited, and the improvement of the current-carrying capacity of the line is limited.
Invar steel is high nickel-based low expansion coefficient alloy steel with 32-42% of nickel content, and is widely applied to aerospace, marine transportation and precision instruments and meters at present. In recent years, in a power transmission system, in order to improve the transmission capability of a specific line, invar is used as a reinforcing core of a special transmission wire, and the transmission capacity and high-temperature sag problems of the specific line are solved by utilizing the characteristics of small thermal expansion coefficient and high strength. The invar steel has certain corrosion resistance in dry air, but rust spots are very easy to appear in humid air, and the transmission lead is erected outdoors for a long time, so that the problem of rust spot corrosion needs to be solved.
At present, the surface of an invar steel wire is coated with an aluminum layer to improve the corrosion resistance of the invar steel wire, but the chemical components, the structural metallographic structure and the physical characteristics of the invar steel wire are difficult to realize by adopting a drawing process of coating the aluminum layer, the production cost is high, the performance stability is poor, and the popularization and the application of the invar steel wire in the field of electric overhead conductors are restricted. Solving the corrosion resistance of invar steel and reducing the manufacturing cost is a problem to be solved urgently by technical personnel in the industry.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a zinc-aluminum coating invar single wire with small thermal expansion coefficient, high temperature resistance, high tensile strength and corrosion resistance and a preparation method thereof.
According to the technical scheme provided by the invention, the zinc-aluminum coating invar steel single wire comprises an invar steel core wire and a zinc-aluminum coating coated outside the invar steel core wire; the invar steel core wire comprises the following components in percentage by mass: 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, less than or equal to 0.10wt% of other impurity elements and the balance of iron; the zinc-aluminum coating comprises the following components in percentage by mass: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of aluminum.
Preferably, the diameter of the invar core wire is 1.0-5.0 mm, and the thickness of the zinc-aluminum coating is 0.10-0.35 mm.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: smelting molten steel by using an argon oxygen refining furnace, wherein alloy elements of the molten steel are controlled to be 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, the sum of other impurity elements is less than or equal to 0.10wt%, and the balance is iron;
s2, casting and crystallizing: pouring molten steel in the smelting furnace into a casting machine for continuous casting, wherein the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, the molten steel is continuously cast and cooled into an alloy steel ingot through a casting machine crystallization wheel, and the leading-out temperature of the alloy steel ingot is controlled to be 900-1250 ℃;
s3, steel ingot rolling: leading out the hot alloy steel ingot, firstly, feeding the hot alloy steel ingot into a rough rolling unit for rough rolling, and then, feeding the hot alloy steel ingot into a finishing rolling unit for continuous rolling to form a round blank, wherein the diameter of the blank is 5.0-10 mm, and the blank is coiled and wound in a winding mode;
s4, blank drawing: drawing the looped blank into an invar core wire with the diameter of 1.0-5.0 mm by equipment, controlling the elongation rate to be 1.05-1.20 in a drawing pass, and looping and winding the drawn invar core wire;
s5, steel wire pickling: spreading the looped invar core wire by a pay-off device and passing through a pickling tank, and removing the surface oxide of the invar core wire under the action of acid liquor;
s6, steel wire cleaning: leading the pickled invar steel core wires out, immediately leading the invar steel core wires into a water tank, cleaning the surfaces of the invar steel core wires under the action of ultrasonic waves and clear water, leading the invar steel core wires out of the water tank, drying the invar steel core wires by a blowing device, and controlling the wind temperature to be 40-60 ℃;
s7, preheating steel wires: preheating a dry invar steel core wire by an intermediate frequency furnace under the protection of protective gas, wherein the intermediate frequency furnace is provided with an invar steel core wire gas protection tube, the protective gas enters from a one-way air inlet valve at the bottom of the protection tube and is discharged through a top port of the protection tube, the protective gas is high-purity nitrogen or inert gas, the pressure range of the protective gas is 0.1-0.5 MPa, the preheating temperature of the invar steel core wire is controlled at 400-700 ℃, and the bottom port of the gas protection tube in the preheating of the intermediate frequency furnace extends into a hot-dip galvanized aluminum bath;
s8, dip coating: introducing the preheated invar steel core wire into a hot-dip galvanizing aluminum bath, and injecting the following components in percentage by mass into the hot-dip galvanizing aluminum bath: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of molten zinc-aluminum alloy of aluminum; controlling the temperature range of the zinc-aluminum alloy molten liquid to be 480-680 ℃, wherein the liquid level of the injected zinc-aluminum alloy molten liquid is higher than the bottom port of the protection tube, and the time for continuously routing and dipping the invar steel core wire in the hot-dip galvanizing aluminum bath pool is controlled to be 3-15 seconds;
s9, forming and cooling: continuously routing invar steel core wires in a hot dip galvanizing aluminum bath, vertically and upwardly leading out the invar steel core wires from a zinc-aluminum alloy melt, forming uniform zinc-aluminum coating films on the surfaces of the invar steel core wires by means of gravity and the adhesion of the alloy melt, controlling the thickness of the zinc-aluminum coating films by the routing speed, and cooling and curing the zinc-aluminum coating films by a cooling device after forming, thereby obtaining invar steel single wires of the zinc-aluminum coating layers;
s10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Preferably, in step S1, the molten steel alloy elements are controlled to be 33.3-35.82 wt% of nickel, 0.506-0.792 wt% of chromium, 0.511-0.927 wt% of cobalt, 1.012-1.19 wt% of molybdenum, the total of other impurity elements is 0.038-0.087 wt%, and the balance is iron.
Preferably, in step S8, the following components are injected into the hot-dip galvanized aluminum bath in percentage by mass: 75.02-87.82 wt% of zinc, 0.95-1.42 wt% of other impurity elements, and the balance of aluminum.
The invention has the following advantages:
1. according to the invention, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt and 1.0-1.2 wt% of molybdenum alloy elements are introduced into the invar alloy. The corrosion resistance of the invar steel core wire is improved by the combined action of the alloy elements of chromium, cobalt and molybdenum, and the strength, hardness, toughness and temperature resistance of the invar steel core wire are improved. The invar steel core wire is continuously wired and coated in a high-temperature zinc-aluminum bath pool, the aluminum element is enriched on the surface layer of the invar steel core wire, so that the zinc-aluminum coating is more firmly attached to the surface of the invar steel core wire, and the zinc-aluminum comprehensive coating improves the corrosion resistance of the invar steel core wire.
2. The linear expansion coefficient of the invar steel single line of the zinc-aluminum coating provided by the invention is less than 3.8 multiplied by 10-61/DEG C, tensile strength higher than 1000MPa, 100 times diameter capable of bearing more than 35 circles of continuous torsion, and the use of the overhead conductor to reinforce the core can ensure that the conductor can continuously run at high temperature of 300 ℃ and below.
3. The zinc-aluminum plating invar single wire provided by the invention is applied to the production of the overhead power transmission line, so that the transmission capacity of the wire is improved, the high-temperature sag of the power transmission line is controlled, the safe operation of the line is ensured, the service life of the line can be prolonged due to the excellent corrosion resistance, and great economic and social benefits are brought to the power transmission and transformation industry.
Drawings
FIG. 1 is a structural diagram of a single line of zinc-aluminum coated invar steel in the present invention.
FIG. 2 is a flow chart of a preparation process of a zinc-aluminum plated invar single line in the invention.
Figure 3 is a schematic view of a coating process of an invar core wire in the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
A1.35 mm diameter zinc-aluminum coating invar steel single wire 3 comprises an invar steel core wire 1 with a diameter of 1.25mm and a zinc-aluminum coating 2 coated outside the invar steel core wire and with a thickness of 0.10 mm; the invar core wire 1 comprises the following components in percentage by mass: 33.30 wt% of nickel, 0.506 wt% of chromium, 0.53 wt% of cobalt, 1.19 wt% of molybdenum, 64.436 wt% of iron and 0.038 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 87.82 wt% of zinc, 11.03 wt% of aluminum and 1.15 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 1100-1250 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out, firstly, rough rolling is carried out, then, the hot steel ingot enters a finishing mill set to be continuously rolled into a round blank, the diameter of the blank is 5.0mm, and the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 5.0mm for 20-22 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.25mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating the steel wire: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.10-0.12 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 400-420 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is 10cm higher than the bottom port 713 of the protection tube to prevent the protective gas from overflowing from the bottom port 713 of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 480-500 ℃; the continuous routing and dipping time of the invar steel core wire 1 galvanized aluminum bath 8 is controlled to be 3-5 seconds.
S9, forming and cooling: the invar steel core wire 1 is vertically and upwards led out from the zinc-aluminum alloy liquid 81 by continuously routing in the hot dip galvanizing aluminum bath 8, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by routing speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 1.35mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: the zinc-aluminum coating invar single wire is wound into a ring by using a wire-winding device.
Example 2
A zinc-aluminum coating invar single wire 3 with the diameter of 1.50mm comprises an invar core wire 1 with the diameter of 1.28mm and a zinc-aluminum coating 2 with the thickness of 0.11mm coated outside the invar core wire; the invar core wire 1 comprises the following components in percentage by mass: 33.30 wt% of nickel, 0.506 wt% of chromium, 0.53 wt% of cobalt, 1.19 wt% of molybdenum, 64.436 wt% of iron and 0.038 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 87.82 wt% of zinc, 11.03 wt% of aluminum and 1.15 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 1100-1250 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out, firstly, rough rolling is carried out, then, the hot steel ingot enters a finishing mill set to be continuously rolled into a round blank, the diameter of the blank is 5.0mm, and the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 5.0mm by 19-21 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.28mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.10-0.12 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 400-420 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is 10cm higher than the bottom port 713 of the protection tube to prevent the protective gas from overflowing from the bottom port 713 of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 480-500 ℃; the continuous routing and dipping time of the invar steel core wire 1 galvanized aluminum bath 8 is controlled to be 3-5 seconds.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 1.5mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Example 3
A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 1.85mm comprises an invar steel core wire 1 with the diameter of 1.59mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.13 mm; the invar core wire 1 comprises the following components in percentage by mass: 33.31 wt% of nickel, 0.548 wt% of chromium, 0.615 wt% of cobalt, 1.02 wt% of molybdenum, 64.452 wt% of iron and 0.055 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 87.82 wt% of zinc, 11.03 wt% of aluminum and 1.15 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 1100-1250 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out, firstly, rough rolling is carried out, then, the hot steel ingot enters a finishing mill set to be continuously rolled into a round blank, the diameter of the blank is 5.0mm, and the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 5.0mm for 18-20 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.59mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar core wire 1 is led out and then is immediately led into a water tank 6, the surface of the invar core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.11-0.13 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 420-440 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar core wire 1 is introduced into a hot-dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot-dip galvanizing aluminum bath 8, and the alloy liquid level 811 is 12cm higher than the port 713 at the bottom of the protection tube, so that the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 490-510 ℃; the continuous routing and dipping time of the invar steel core wire 1 galvanized aluminum bath 8 is controlled to be 4-6 seconds.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 1.85mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Example 4
A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 2.00mm comprises an invar steel core wire 1 with the diameter of 1.70mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.15 mm; the invar core wire 1 comprises the following components in percentage by mass: 33.31 wt% of nickel, 0.548 wt% of chromium, 0.615 wt% of cobalt, 1.02 wt% of molybdenum, 64.452 wt% of iron and 0.055 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.83 wt% of zinc, 12.75 wt% of aluminum and 1.42 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the quality of a casting blank is improved by avoiding vortex, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the extraction temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 6.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 6.0mm for 18-20 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.70mm, and coiling the invar core wire in a loop;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.18-0.20 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 430-450 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, the alloy liquid level 811 is 14cm higher than the bottom port 713 of the protection tube, and the protective gas is prevented from overflowing from the bottom port 713 of the protection tube. Controlling the temperature range of the molten zinc-aluminum alloy 81 to be 510-530 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 5-7 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the zinc-aluminum coating with the wire diameter of 2.00mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: the zinc-aluminum coating invar single wire is wound into a ring by using a wire-winding device.
Example 5
A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 2.25mm comprises an invar steel core wire 1 with the diameter of 1.89mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.18 mm; the invar core wire 1 comprises the following components in percentage by mass: 33.786 wt% of nickel, 0.612 wt% of chromium, 0.684 wt% of cobalt, 1.108 wt% of molybdenum, 63.739 wt% of iron and 0.071 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.83 wt% of zinc, 12.75 wt% of aluminum and 1.42 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 6.5mm in a finishing mill group, and the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 6.5mm by 16-18 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 1.89mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.18-0.20 MPa. The preheating temperature of the invar core wire 1 is related to the diameter of the invar core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 440-460 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar core wire 1 is introduced into a hot-dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot-dip galvanizing aluminum bath 8, and the alloy liquid level 811 is 16cm higher than the bottom port 713 of the protection tube to prevent the protective gas from overflowing from the bottom port 713 of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 520-540 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 6-8 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the wire diameter of 2.25mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: the zinc-aluminum coating invar single wire is wound into a ring by using a wire-winding device.
Example 6
A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 2.50mm comprises an invar steel core wire 1 with the diameter of 2.10mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.20 mm; the invar core wire 1 comprises the following components in percentage by mass: 34.256 wt% of nickel, 0.623 wt% of chromium, 0.682 wt% of cobalt, 1.106 wt% of molybdenum, 63.268 wt% of iron and 0.065 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.83 wt% of zinc, 12.75 wt% of aluminum and 1.42 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 7.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 7.0mm for 15-18 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 2.10mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of nitrogen protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.21-0.23 MPa. The preheating temperature of the invar steel core wire 1 is related to the diameter of the invar steel core wire 1 and the film coating efficiency, and the preferable range of the preheating temperature is 460-480 ℃; a gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by 18cm totally, so that the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 530-550 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 7-9 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the wire diameter of 2.50mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
The zinc-aluminum plating layer invar single wire 3 obtained in the embodiments 1 to 6 is detected to have (1) tensile strength; (2) the length of the single wire with the diameter of 100 times bears 35 circles of continuous torsion; (3) testing the expansion coefficient of 100-300 ℃ by a differential method; (4) and (3) corrosion resistance, exposed in a 5% NaCl spray environment with the temperature of 35 +/-1 ℃ and maintained for 168h, and the corrosion grade of the single line surface. The test data are shown in table 1.
TABLE 1
Example 7
A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 2.85mm comprises an invar steel core wire 1 with the diameter of 2.51mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.17 mm; the invar core wire 1 comprises the following components in percentage by mass: 34.731 wt% of nickel, 0.653 wt% of chromium, 0.511 wt% of cobalt, 1.012 wt% of molybdenum, 63.016 wt% of iron and 0.077 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.51 wt% of zinc, 13.25 wt% of aluminum and 1.24 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 7.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 7.0mm for 14-18 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 2.51mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar core wire 1 is led out and then is immediately led into a water tank 6, the surface of the invar core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.22-0.24 MPa. The preheating temperature is preferably 500-520 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 18cm so as to prevent the protective gas from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 540-570 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 8-10 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 2.85mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Example 8
A3.00 mm diameter zinc-aluminum plating layer invar steel single wire 3 comprises an invar steel core wire 1 with the diameter of 2.64mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.18 mm; the invar core wire 1 comprises the following components in percentage by mass: 34.731 wt% of nickel, 0.653 wt% of chromium, 0.511 wt% of cobalt, 1.012 wt% of molybdenum, 63.016 wt% of iron and 0.077 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 85.51 wt% of zinc, 13.25 wt% of aluminum and 1.24 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1050-1200 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 7.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 7.0mm for 14-17 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 2.64mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.24-0.26 MPa. The preferable range of the preheating temperature is 530-550 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 20cm, and the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 550-580 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 8-10 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the zinc-aluminum coating of 3.00mm in diameter is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Example 9
A3.25 mm diameter zinc-aluminum coating invar steel single wire 3, including 2.85mm diameter invar steel core 1 and coating the invar steel core outside the zinc-aluminum coating 2 with the thickness of 0.20 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.071 wt% of nickel, 0.792 wt% of chromium, 0.947 wt% of cobalt, 1.181 wt% of molybdenum, 61.945 wt% of iron and 0.064 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 82.75 wt% of zinc, 16.09 wt% of aluminum and 1.16 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of a cast blank is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1000-1150 ℃.
S3, steel ingot rolling: and leading out the hot steel ingot, firstly, carrying out rough rolling, and then, continuously rolling the hot steel ingot into a round blank with the diameter of 8.0mm in a finishing mill group, wherein the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 8.0mm for 13-16 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 2.85mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.26-0.30 MPa. The preheating temperature is preferably 550-580 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 20cm, and the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 560-600 ℃; the time for dipping the continuous traces of the bath 8 with the invar core 1 coated with zinc and aluminum is generally controlled to be 10-12 seconds according to the diameter of the invar core 1, the thickness of the zinc and aluminum coating 2, the bath temperature of the bath 8 with zinc and aluminum.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the diameter of 3.25mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Example 10
A3.50 mm diameter zinc-aluminum plating layer invar steel single wire 3 comprises an invar steel core wire 1 with a diameter of 3.08mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with a thickness of 0.21 mm; the invar steel core wire 1 comprises the following components, by mass, 35.071 wt% of nickel, 0.792 wt% of chromium, 0.947 wt% of cobalt, 1.181 wt% of molybdenum, 61.945 wt% of iron and 0.064 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 82.75 wt% of zinc, 16.09 wt% of aluminum and 1.16 wt% of other impurity elements.
The preparation method of the zinc-aluminum coating invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of a cast blank is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 1000-1150 ℃.
S3, steel ingot rolling: and leading out the hot steel ingot, firstly, carrying out rough rolling, and then, continuously rolling the hot steel ingot into a round blank with the diameter of 8.0mm in a finishing mill group, wherein the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 8.0mm for 13-16 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 3.08mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the surface oxide of the invar core wire 1 is removed by an acid bath 5 under the action of an acid liquid 51.
S6, steel wire cleaning: the pickled invar core wire 1 is led out and then is immediately led into a water tank 6, the surface of the invar core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.28-0.32 MPa. The preheating temperature is preferably 560-590 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 20cm, and the protective gas is prevented from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 580-600 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 10-13 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the diameter of 3.50mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Example 11
A3.85 mm diameter zinc-aluminum coating invar steel single wire 3 comprises an invar steel core wire 1 with a diameter of 3.39mm and a zinc-aluminum coating 2 coated outside the invar steel core wire with a thickness of 0.23 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.470 wt% of nickel, 0.761 wt% of chromium, 0.911 wt% of cobalt, 1.090 wt% of molybdenum, 61.688 wt% of iron and 0.080 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 78.55 wt% of zinc, 20.44 wt% of aluminum and 1.01 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 950-1100 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank by a finishing mill group, the diameter of the blank is 9.0mm, and the blank is coiled and wound by adopting a winding mode.
S4, blank drawing: drawing a blank with the diameter of 9.0mm for 13-16 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 3.39mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar core wire 1 is led out and then is immediately led into a water tank 6, the surface of the invar core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating the steel wire: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.30-0.35 MPa. The preferable range of the preheating temperature is 600-640 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by over 22cm so as to prevent the protective gas from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 600-650 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 10-13 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that the invar steel single wire 3 with the diameter of 3.85mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Example 12
A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 4.00mm comprises an invar steel core wire 1 with the diameter of 3.52mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.24 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.470 wt% of nickel, 0.761 wt% of chromium, 0.911 wt% of cobalt, 1.090 wt% of molybdenum, 61.688 wt% of iron and 0.080 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 78.55 wt% of zinc, 20.44 wt% of aluminum and 1.01 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled at 950-1100 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank by a finishing mill group, the diameter of the blank is 9.0mm, and the blank is coiled and wound by adopting a winding mode.
S4, blank drawing: drawing a blank with the diameter of 9.0mm for 12-15 passes, controlling the elongation at the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 3.52mm, and coiling the invar core wire in a loop;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar core wire 1 is led out and then is immediately led into a water tank 6, the surface of the invar core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.35-0.40 MPa. The preferable range of the preheating temperature is 620-660 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the process is injected into the hot galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by over 22cm so as to prevent the protective gas from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 630-650 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 12-14 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.
S9, forming and cooling: the invar steel core wire 1 is vertically and upwards led out from the zinc-aluminum alloy liquid 81 by continuously routing in the hot dip galvanizing aluminum bath 8, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by routing speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 4.00mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Example 13
A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 4.50mm comprises an invar steel core wire 1 with the diameter of 3.94mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.28 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.82 wt% of nickel, 0.788 wt% of chromium, 0.927 wt% of cobalt, 1.04 wt% of molybdenum, 61.338 wt% of iron and 0.087 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 76.41 wt% of zinc, 22.46 wt% of aluminum and 1.13 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 900-1100 ℃.
S3, steel ingot rolling: and leading out the hot steel ingot, firstly, carrying out rough rolling, and then, continuously rolling the hot steel ingot into a round blank with the diameter of 9.5mm in a finishing mill set, wherein the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 9.5mm for 14-18 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 3.94mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.40-0.45 MPa. The preheating temperature is preferably 650-680 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot-dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot-dip galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the bottom port 713 of the protection tube by more than 25cm in total, so that the protective gas is prevented from overflowing from the bottom port 713 of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 640-670 ℃; the time for dipping the continuous traces of the bath 8 with the invar core 1 coated with zinc and aluminum is generally controlled to be 8-10 seconds according to the diameter of the invar core 1, the thickness of the zinc and aluminum coating 2, the bath temperature of the bath 8 with zinc and aluminum.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 2.85mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
Example 14
A zinc-aluminum plating layer invar steel single wire 3 with the diameter of 5.50mm comprises an invar steel core wire 1 with the diameter of 4.82mm and a zinc-aluminum plating layer 2 coated outside the invar steel core wire and with the thickness of 0.34 mm; the invar core wire 1 comprises the following components in percentage by mass: 35.82 wt% of nickel, 0.788 wt% of chromium, 0.927 wt% of cobalt, 1.04 wt% of molybdenum, 61.338 wt% of iron and 0.087 wt% of other impurity elements; the zinc-aluminum coating 2 comprises the following components in percentage by mass: 75.02 wt% of zinc, 24.03 wt% of aluminum and 0.95 wt% of other impurity elements.
The preparation method of the zinc-aluminum plating layer invar single wire comprises the following steps:
s1, smelting molten steel: the raw materials of iron, nickel, chromium, cobalt, molybdenum and the like and alloy elements are put into an argon oxygen refining furnace for smelting, the components are adjusted according to the formula process, and then refining is carried out.
S2, casting and crystallizing: and the molten steel in the smelting furnace is injected into a casting machine for continuous casting, the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, so that the eddy current is avoided, the quality of the cast billet is improved, the molten steel is continuously cast and cooled into an alloy steel ingot through a crystallization wheel of the casting machine, and the leading-out temperature of the alloy steel ingot is controlled to be 900-1100 ℃.
S3, steel ingot rolling: the hot steel ingot is drawn out and firstly rolled by rough rolling, and then continuously rolled into a round blank with the diameter of 10.0mm in a finishing mill group, and the blank is coiled and wound in a winding mode.
S4, blank drawing: drawing a blank with the diameter of 10.0mm for 10-14 passes, controlling the elongation of the drawing pass to be 1.05-1.20, drawing the blank into an invar core wire 1 with the diameter of 4.82mm, and coiling the invar core wire in a looping manner;
s5, steel wire pickling: as shown in fig. 3, the looped invar core wire 1 is unwound by a unwinding device 4, and the oxide on the surface of the invar core wire 1 is removed by an acid solution 51 through an acid washing tank 5.
S6, steel wire cleaning: the pickled invar steel core wire 1 is led out and then immediately led into a water tank 6, the surface of the invar steel core wire 1 is cleaned under the action of clear water 61 and ultrasonic waves, the invar steel core wire 1 is dried by a blowing device 62 after being led out from the water tank 6, and the wind temperature is controlled to be 40-60 ℃.
S7, preheating steel wires: the dry invar steel core wire 1 is preheated by the intermediate frequency furnace 7 under the protection of argon protective gas with the purity of 99.99%, the intermediate frequency furnace 7 is provided with an invar steel core wire 1 protection tube 71, protective gas enters from a one-way air inlet valve 712 at the bottom of the protection tube 71 and flows through an inner protection tube of the intermediate frequency furnace 7 and is discharged from a top port 711 of the protection tube, and the pressure range of the protective gas is 0.46-0.50 MPa. The preferable range of the preheating temperature is 670-700 ℃. A gas protection tube bottom port 713 extends into the hot dip galvanizing aluminum bath 8.
S8, dip coating: the preheating invar steel core wire 1 is introduced into a hot dip galvanizing aluminum bath 8, zinc-aluminum alloy liquid 81 with the quality components adjusted according to the product formula and the technology is injected into the hot dip galvanizing aluminum bath 8, and the alloy liquid level 811 is higher than the port 713 at the bottom of the protection tube by more than 18cm so as to prevent the protective gas from overflowing from the port 713 at the bottom of the protection tube. Controlling the temperature range of the zinc-aluminum alloy melt 81 to be 650-680 ℃; the time for continuous routing and dipping of the invar steel core wire 1 in the zinc-aluminum plating bath 8 is generally controlled to be 12-15 seconds according to the wire diameter of the invar steel core wire 1, the thickness of the zinc-aluminum plating film 2, the bath temperature of the zinc-aluminum plating bath 8 and the like.
S9, forming and cooling: the invar steel core wire 1 is continuously wired in a hot dip galvanizing aluminum bath 8 and vertically led out upwards from a zinc-aluminum alloy liquid 81, a uniform zinc-aluminum coating 2 is formed on the surface of the invar steel core wire 1 by means of gravity and the adhesive force of the alloy liquid, the thickness of the zinc-aluminum coating 2 is controlled by the wiring speed, and the zinc-aluminum coating 2 is cooled and solidified by a cooling device 9 after being formed, so that a zinc-aluminum coating invar steel single wire 3 with the diameter of 2.85mm is obtained.
S10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
The zinc-aluminum plating invar single line 3 obtained in examples 7 to 14 is tested by (1) tensile strength; (2) the length of the single wire with the diameter being 100 times bears 35 circles of continuous torsion; (3) testing the expansion coefficient of 100-300 ℃ by a differential method; (4) corrosion resistance, exposed to 5% NaCl spray environment at 35 ℃ +/-1 ℃ and kept for 168h, and the corrosion grade of the single line surface is improved. The test data are shown in table 2.
TABLE 2
Through the embodiments 1 to 14, the invention introduces 0.5 to 0.8wt% of chromium, 0.5 to 1.0wt% of cobalt and 1.0 to 1.2wt% of molybdenum alloy elements into the invar alloy steel. The corrosion resistance of the invar core is improved, and the strength, the hardness, the toughness and the temperature resistance of the invar core are improved. The linear expansion coefficient of the zinc-aluminum plating layer invar steel single line is less than 3.8 multiplied by 10-61/DEG C, tensile strength higher than 1000MPa, 100 times diameter capable of bearing more than 35 circles of continuous torsion, and the use of the overhead conductor to reinforce the core can ensure that the conductor can continuously run at high temperature of 300 ℃ and below.
The zinc-aluminum plating invar steel single wire 3 obtained by the invention is applied to the production of the overhead power transmission line, not only improves the transmission capacity of the wire, controls the high-temperature sag of the power transmission line and ensures the safe operation of the line, but also has excellent corrosion resistance and can prolong the service life of the line, thereby bringing great economic and social benefits to the power transmission and transformation industry.
The foregoing is merely a brief description and illustration of the invention. The invention is not limited thereto, and unless the appended claims define it, it is obvious to those skilled in the art in the light of this specification that the product formulation and process parameters can be adjusted to produce a single line product of invar steel with a zinc-aluminum coating suitable for other fields, which are within the protection of the present invention.
Claims (3)
1. A zinc-aluminum plating layer invar steel single line comprises an invar steel core wire (1) and a zinc-aluminum plating layer (2) coated outside the invar steel core wire (1); the invar core wire (1) comprises the following components in percentage by mass: 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, less than or equal to 0.10wt% of other impurity elements and the balance of iron; the method is characterized in that: the zinc-aluminum coating (2) comprises the following components in percentage by mass: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of aluminum.
2. The single line of zinc-aluminum coated invar steel as claimed in claim 1, wherein: the diameter of the invar steel core wire (1) is 1.0-5.0 mm, and the thickness of the zinc-aluminum coating (2) is 0.10-0.35 mm.
3. The method for preparing a single line of zinc-aluminum coated invar steel as claimed in claim 1, wherein the method comprises the steps of:
s1, smelting molten steel: smelting molten steel by using an argon oxygen refining furnace, wherein the alloy elements of the molten steel are controlled to be 33.0-36.0 wt% of nickel, 0.5-0.8 wt% of chromium, 0.5-1.0 wt% of cobalt, 1.0-1.2 wt% of molybdenum, less than or equal to 0.10wt% of the total of other impurity elements and the balance of iron;
s2, casting and crystallizing: pouring molten steel in the smelting furnace into a casting machine for continuous casting, wherein the casting machine is provided with a horizontal combined casting fort and a horizontal casting nozzle, the molten steel is continuously cast and cooled into an alloy steel ingot through a casting machine crystallization wheel, and the leading-out temperature of the alloy steel ingot is controlled to be 900-1250 ℃;
s3, steel ingot rolling: leading out the hot alloy steel ingot, firstly, feeding the hot alloy steel ingot into a rough rolling unit for rough rolling, and then, feeding the hot alloy steel ingot into a finishing rolling unit for continuous rolling to form a round blank, wherein the diameter of the blank is 5.0-10 mm, and the blank is coiled and wound in a winding mode;
s4, blank drawing: drawing the looped blank into an invar core wire with the diameter of 1.0-5.0 mm by equipment, controlling the elongation rate in a drawing pass to be 1.05-1.20, and looping and winding the drawn invar core wire;
s5, steel wire pickling: spreading the looped invar core wire by a pay-off device and passing through a pickling tank, and removing the surface oxide of the invar core wire under the action of acid liquor;
s6, steel wire cleaning: leading out the pickled invar steel core wires, immediately leading the extracted invar steel core wires into a water tank, cleaning the surfaces of the invar steel core wires under the action of ultrasonic waves and clear water, drying the invar steel core wires after the invar steel core wires are led out of the water tank by a blowing device, and controlling the wind temperature to be 40-60 ℃;
s7, preheating steel wires: preheating a dry invar steel core wire by an intermediate frequency furnace under the protection of protective gas, wherein the intermediate frequency furnace is provided with an invar steel core wire gas protection tube, the protective gas enters from a one-way air inlet valve at the bottom of the protection tube and is discharged through a top port of the protection tube, the protective gas is high-purity nitrogen or inert gas, the pressure range of the protective gas is 0.1-0.5 MPa, the preheating temperature of the invar steel core wire is controlled at 400-700 ℃, and the bottom port of the gas protection tube in the preheating of the intermediate frequency furnace extends into a hot-dip galvanized aluminum bath;
s8, dip coating: introducing the preheated invar core wire into a hot-dip galvanizing aluminum bath, and injecting the following components in percentage by mass into the hot-dip galvanizing aluminum bath: 75-88 wt% of zinc, less than or equal to 1.5wt% of the total amount of other impurity elements and the balance of molten zinc-aluminum alloy of aluminum; controlling the temperature range of the zinc-aluminum alloy molten liquid to be 480-680 ℃, wherein the liquid level of the injected zinc-aluminum alloy molten liquid is higher than the bottom port of the protection tube, and the time for continuously routing and dipping the invar steel core wire in the hot-dip galvanizing aluminum bath pool is controlled to be 3-15 seconds;
s9, forming and cooling: continuously routing invar steel core wires in a hot dip galvanizing aluminum bath, vertically and upwardly leading out the invar steel core wires from a zinc-aluminum alloy melt, forming uniform zinc-aluminum coating films on the surfaces of the invar steel core wires by means of gravity and the adhesion of the alloy melt, controlling the thickness of the zinc-aluminum coating films by the routing speed, and cooling and curing the zinc-aluminum coating films by a cooling device after forming, thereby obtaining invar steel single wires of the zinc-aluminum coating layers;
s10, detecting the wire diameter: detecting the diameter of the cooled and solidified zinc-aluminum plating layer invar single line by a diameter measuring instrument;
s11, looping and winding: and winding the zinc-aluminum plating layer invar single wire into a ring by using a winding device.
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