CN109290387A - A kind of high strength steel strand technique - Google Patents
A kind of high strength steel strand technique Download PDFInfo
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- CN109290387A CN109290387A CN201810954577.4A CN201810954577A CN109290387A CN 109290387 A CN109290387 A CN 109290387A CN 201810954577 A CN201810954577 A CN 201810954577A CN 109290387 A CN109290387 A CN 109290387A
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- steel strand
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
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- Chemical & Material Sciences (AREA)
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- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
A kind of high strength steel strand technique provided by the invention, steel strand wires are made of 98Si high-carbon hypereutectoid steel, comprising the following steps: 1) quenched: wire rod first being heated 15-20s in 860 ± 20 DEG C of temperature, then is cooled to 520 DEG C of formation wire rods, preheating insulation 15-20min；2) salt bath: wire rod is set in 500-520 DEG C and keeps the temperature 1-1.2min, be quickly cooled down the uniform wire rod of temperature after spinning in a vacuum by fused salt by salt bath cooling bath, salt bath temperature；3) it cleans: being cleaned by the wire rod that salt bath isothermobath comes out by rinse bath, the wire rod temperature after cleaning is controlled at 400-450 DEG C；It is dried after cleaning.By selecting 98Si high-carbon hypereutectoid steel to be made in the present invention, quenched, salt bath and cleaning are carried out respectively, so that the intensity of steel strand wires greatly improves, reaches 2400MPa；Breach the water-bath bring limitation of existing steel strand wires；Existing steel strand wires can not be applicable in salt bath to handle simultaneously, and the present invention is by being arranged quenched process, so that steel strand wires are overrun through salt bath, high treating effect, high production efficiency.
Description
Technical field
The present invention relates to cable production line fields, and in particular to a kind of high strength steel strand technique and its high strength steel twist
Line.
Background technique
On large cross line, to resist the own wt of speciality and the natural environment of complexity, it is necessary to improve the anti-of conducting wire
Pulling force can be only achieved best pulling force weight ratio combined effect, by improving tensile strength, can just accomplish not only to have improved stretching resistance but also
Reduce the dual purpose of own wt.So-called Great span often crosses over big as the term suggests being exactly to need across big span
River, high mountain etc., it is its characteristic that speciality is extra heavy.Large cross line is required to use Extra High Strength steel strand wires, zinc-coated wire twists
Tensile strength >=1910MPa, twisted rear tensile strength >=1815MPa before closing；It even requires to reach under more large span stretching condition
To 2400 MPa.The twisted preceding tensile strength of existing steel strand wires only has 1850-2000 MPa, tensile strength before being twisted
There is 1800-1950 MPa, be unable to reach 2400MPa, under more large span stretching condition, can not be applicable in.
The existing patent document application No. is CN201711361325.2 discloses " 1 × 7-21.6mm, 1860MPa steel
Strand production process ", the steel strand wires of preparation are tensile strength 1860-1980MPa, and tensile strength is inadequate, is unable to reach
The requirement of 2400MPa.
Summary of the invention
(1) technical problems to be solved
The object of the present invention is to provide a kind of high strength steel strand techniques, solve the steel strand wires intensity of existing steel strand wires preparation
Tensile strength is inadequate, is unable to reach the defect of 2400MPa.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of high strength steel strand technique, steel strand wires use 98Si high-carbon
Hypereutectoid steel is made, comprising the following steps:
1) quenched: wire rod first being heated into 15-20s in 860 ± 20 DEG C of temperature, then is cooled to 520 DEG C of formation wire rods, preheating insulation
15-20min；
2) salt bath: wire rod is set in 500-520 DEG C and keeps the temperature 1-1.2min by salt bath cooling bath, salt bath temperature, by molten
The uniform wire rod of temperature after spinning is quickly cooled down by salt in a vacuum；
3) it cleans: being cleaned by the wire rod that salt bath isothermobath comes out by rinse bath, the wire rod temperature after cleaning is controlled in 400-450
℃；It is dried after cleaning.
By selecting 98Si high-carbon hypereutectoid steel to be made in the present invention, quenched, salt bath and cleaning are carried out respectively, so that steel twists
The intensity of line greatly improves, and reaches 2400MPa；Breach the water-bath bring limitation of existing steel strand wires；Existing steel twists simultaneously
Line can not be applicable in salt bath to handle, and the present invention is by being arranged quenched process, so that steel strand wires are overrun through salt bath, treatment effect
Good, high production efficiency.
Preferably, the mixture of sodium chloride, calcium chloride, zinc oxide, zinc chloride and zirconium chloride is used in the salt bath, is mixed
Conjunction object includes wherein 10-12 parts of sodium chloride, 20-22 parts of calcium chloride, 0.2-0.3 parts of zinc oxide, zinc chloride 0.5- by weight
0.6 part and 0.1-0.2 parts of zirconium chloride.The present invention is suitable for the salt bath formulas of steel strand wires by setting, wherein zinc oxide with
Steel strand wires are attached to after zinc chloride mixing, the moisture in zinc chloride ingress of air forms protective layer in steel strand surface, corrosion-resistant
Effect and tensile strength.
Preferably, the quenched process is additionally provided with surface treatment procedure, the surface treatment procedure are as follows: removes stockline material
Hot rolling oxide skin is simultaneously cleaned.
Preferably, in the surface treatment procedure, after removal hot rolling oxide skin and cleaning operation, subsequently into rinse bath
Cleaning, descaling bath carry out pickling, enter back into phosphating equipment and carry out phosphorating treatment, finally enter drying equipment drying, must pre-process
Wire rod.
Preferably, when the phosphating operation, phosphatization temperature is 50-55 DEG C, phosphating time 5-10min.
Preferably, water-bath process, the water-bath process, by the wire rod after cleaning, warp are additionally provided with after the cleaning process
Cross the heating of four-part form heat-treatment furnace, heating temperature are as follows: 750 DEG C ~ 820 DEG C, carry out water quenching, drying, water-bath subsequently into sink
Agent temperature is 85 DEG C, and the water-bath agent includes sodium chloride, its content of precentagewise is 5%.
Preferably, wire drawing winding process, the wire drawing winding are as follows: drawing will clean are additionally provided with after the water-bath process
Wire rod afterwards is carried out multi pass drawing, obtains semi-finished product wire rod, finally wound using take-up mechanism.
The present invention also provides a kind of high strength steel strand, the twisted preceding stretch resistance of the high strength steel strand is
2400-2500MPa, elongation percentage >=4.5%.
(3) beneficial effect
A kind of high strength steel strand technique provided by the invention, has the advantage that
1, quenched, salt bath and cleaning are carried out respectively, so that steel strand wires by selecting 98Si high-carbon hypereutectoid steel to be made in the present invention
Intensity greatly improve, reach 2400MPa；Breach the water-bath bring limitation of existing steel strand wires；Existing steel strand wires simultaneously
Salt bath can not be applicable in handle, the present invention is by being arranged quenched process, so that steel strand wires are overrun through salt bath, treatment effect
Good, high production efficiency.
2, the present invention is suitable for the salt bath formula of steel strand wires by setting, is attached to after wherein zinc oxide is mixed with zinc chloride
Steel strand wires, the moisture in zinc chloride ingress of air form protective layer, anticorrosion effect and tensile strength in steel strand surface.
Detailed description of the invention
Fig. 1 is the process flow diagram of high strength steel strand technique of the invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Following instance
For illustrating the present invention, but it is not intended to limit the scope of the invention.
Embodiment 1: a kind of high strength steel strand technique provided by the invention, steel strand wires use 98Si high-carbon hypereutectoid steel
At, comprising the following steps:
1) it is surface-treated: stockline material being removed into hot rolling oxide skin and is cleaned；It is cleaned subsequently into rinse bath, descaling bath carries out acid
It washes, enters back into phosphating equipment and carry out phosphorating treatment, finally enter drying equipment drying, obtain pretreatment wire rod.The phosphating operation
When, phosphatization temperature is 50 DEG C, phosphating time 50min.
2) quenched: wire rod first being heated into 15-20s in 860 ± 20 DEG C of temperature, then is cooled to 520 DEG C of formation wire rods, preheating is protected
Warm 15-20min；
3) salt bath: wire rod is set in 500-520 DEG C and keeps the temperature 1-1.2min by salt bath cooling bath, salt bath temperature, by molten
The uniform wire rod of temperature after spinning is quickly cooled down by salt in a vacuum；In the salt bath using sodium chloride, calcium chloride, zinc oxide,
The mixture of zinc chloride and zirconium chloride, mixture wherein by weight, comprising 10-12 parts of sodium chloride, 20-22 parts of calcium chloride,
The zirconium chloride of 0.2-0.3 parts of zinc oxide, 0.5-0.6 parts and 0.1-0.2 parts of zinc chloride.
4) it cleans: being cleaned by the wire rod that salt bath isothermobath comes out by rinse bath, the wire rod temperature control after cleaning exists
400-450 ℃；It is dried after cleaning.
5) water-bath: the wire rod after cleaning heats, heating temperature by four-part form heat-treatment furnace are as follows: 750 DEG C ~ 820 DEG C,
Carry out water quenching, drying subsequently into sink, water-bath agent temperature is 85 DEG C, and the water-bath agent includes sodium chloride, precentagewise its
Content is 5%.
6) wire drawing is wound: by the wire rod after cleaning, being carried out multi pass drawing, is obtained semi-finished product wire rod, finally uses admission machine
Structure winding.
The performance of product prepared by the present embodiment 1 is as shown in Table 1:
| Serial number | Project | Test result |
| 1 | Stretch resistance before twisted | 2420MPa |
| 2 | Twisted post-tensioning drag | 2510MPa |
| 3 | Elongation percentage | 4.6% |
| 4 | Yield force | 785kN |
Embodiment 2: a kind of high strength steel strand technique provided by the invention, steel strand wires are made of 98Si high-carbon hypereutectoid steel,
The following steps are included:
1) it is surface-treated: stockline material being removed into hot rolling oxide skin and is cleaned；It is cleaned subsequently into rinse bath, descaling bath carries out acid
It washes, enters back into phosphating equipment and carry out phosphorating treatment, finally enter drying equipment drying, obtain pretreatment wire rod.The phosphating operation
When, phosphatization temperature is 50-55 DEG C, phosphating time 5-10min.
2) quenched: wire rod first being heated into 15-20s in 860 ± 20 DEG C of temperature, then is cooled to 520 DEG C of formation wire rods, preheating is protected
Warm 15-20min；
3) salt bath: wire rod is set in 500-520 DEG C and keeps the temperature 1-1.2min by salt bath cooling bath, salt bath temperature, by molten
The uniform wire rod of temperature after spinning is quickly cooled down by salt in a vacuum；In the salt bath using sodium chloride, calcium chloride, zinc oxide,
The mixture of zinc chloride and zirconium chloride, mixture wherein by weight, comprising 10-12 parts of sodium chloride, 20-22 parts of calcium chloride,
The zirconium chloride of 0.2-0.3 parts of zinc oxide, 0.5-0.6 parts and 0.1-0.2 parts of zinc chloride.
4) it cleans: being cleaned by the wire rod that salt bath isothermobath comes out by rinse bath, the wire rod temperature control after cleaning exists
400-450 ℃；It is dried after cleaning.
5) water-bath: the wire rod after cleaning heats, heating temperature by four-part form heat-treatment furnace are as follows: 750 DEG C ~ 820 DEG C,
Carry out water quenching, drying subsequently into sink, water-bath agent temperature is 85 DEG C, and the water-bath agent includes sodium chloride, precentagewise its
Content is 5%.
6) wire drawing is wound: by the wire rod after cleaning, being carried out multi pass drawing, is obtained semi-finished product wire rod, finally uses admission machine
Structure winding.
The performance of product prepared by the present embodiment 2 is as shown in Table 2:
| Serial number | Project | Test result |
| 1 | Stretch resistance before twisted | 2410MPa |
| 2 | Twisted post-tensioning drag | 2490MPa |
| 3 | Elongation percentage | 4.8% |
| 4 | Yield force | 820kN |
Embodiment 3: a kind of high strength steel strand technique provided by the invention, steel strand wires are made of 98Si high-carbon hypereutectoid steel,
The following steps are included:
1) it is surface-treated: stockline material being removed into hot rolling oxide skin and is cleaned；It is cleaned subsequently into rinse bath, descaling bath carries out acid
It washes, enters back into phosphating equipment and carry out phosphorating treatment, finally enter drying equipment drying, obtain pretreatment wire rod.The phosphating operation
When, phosphatization temperature is 50-55 DEG C, phosphating time 5-10min.
2) quenched: wire rod first being heated into 15-20s in 860 ± 20 DEG C of temperature, then is cooled to 520 DEG C of formation wire rods, preheating is protected
Warm 15-20min；
3) salt bath: wire rod is set in 500-520 DEG C and keeps the temperature 1-1.2min by salt bath cooling bath, salt bath temperature, by molten
The uniform wire rod of temperature after spinning is quickly cooled down by salt in a vacuum；In the salt bath using sodium chloride, calcium chloride, zinc oxide,
The mixture of zinc chloride and zirconium chloride, mixture wherein by weight, comprising 10-12 parts of sodium chloride, 20-22 parts of calcium chloride,
The zirconium chloride of 0.2-0.3 parts of zinc oxide, 0.5-0.6 parts and 0.1-0.2 parts of zinc chloride.
4) it cleans: being cleaned by the wire rod that salt bath isothermobath comes out by rinse bath, the wire rod temperature control after cleaning exists
400-450 ℃；It is dried after cleaning.
5) water-bath: the wire rod after cleaning heats, heating temperature by four-part form heat-treatment furnace are as follows: 750 DEG C ~ 820 DEG C,
Carry out water quenching, drying subsequently into sink, water-bath agent temperature is 85 DEG C, and the water-bath agent includes sodium chloride, precentagewise its
Content is 5%.
6) wire drawing is wound: by the wire rod after cleaning, being carried out multi pass drawing, is obtained semi-finished product wire rod, finally uses admission machine
Structure winding.
The performance of product prepared by the present embodiment 3 is as shown in Table 3:
| Serial number | Project | Test result |
| 1 | Stretch resistance before twisted | 2310MPa |
| 2 | Twisted post-tensioning drag | 2360MPa |
| 3 | Elongation percentage | 3.5% |
| 4 | Yield force | 460kN |
Comparative example 1: a kind of high strength steel strand technique provided by the invention, steel strand wires are made of 98Si high-carbon hypereutectoid steel,
The following steps are included:
1) it is surface-treated: stockline material being removed into hot rolling oxide skin and is cleaned；It is cleaned subsequently into rinse bath, descaling bath carries out acid
It washes, enters back into phosphating equipment and carry out phosphorating treatment, finally enter drying equipment drying, obtain pretreatment wire rod.The phosphating operation
When, phosphatization temperature is 50-55 DEG C, phosphating time 5-10min.
2) quenched: wire rod first being heated into 15-20s in 860 ± 20 DEG C of temperature, then is cooled to 520 DEG C of formation wire rods, preheating is protected
Warm 15-20min；
3) salt bath: wire rod is set in 500-520 DEG C and keeps the temperature 1-1.2min by salt bath cooling bath, salt bath temperature, by molten
The uniform wire rod of temperature after spinning is quickly cooled down by salt in a vacuum；In the salt bath using sodium chloride, calcium chloride, zinc oxide,
The mixture of zinc chloride and zirconium chloride, mixture wherein by weight, comprising 10-12 parts of sodium chloride, 20-22 parts of calcium chloride,
The zirconium chloride of 0.2-0.3 parts of zinc oxide, 0.5-0.6 parts and 0.1-0.2 parts of zinc chloride.
4) it cleans: being cleaned by the wire rod that salt bath isothermobath comes out by rinse bath, the wire rod temperature control after cleaning exists
400-450 ℃；It is dried after cleaning.
5) water-bath: the wire rod after cleaning heats, heating temperature by four-part form heat-treatment furnace are as follows: 750 DEG C ~ 820 DEG C,
Carry out water quenching, drying subsequently into sink, water-bath agent temperature is 85 DEG C, and the water-bath agent includes sodium chloride, precentagewise its
Content is 5%.
6) wire drawing is wound: by the wire rod after cleaning, being carried out multi pass drawing, is obtained semi-finished product wire rod, finally uses admission machine
Structure winding.
The performance of product prepared by this comparative example 1 is as shown in Table 4:
| Serial number | Project | Test result |
| 1 | Stretch resistance before twisted | 2510MPa |
| 2 | Twisted post-tensioning drag | 2550MPa |
| 3 | Elongation percentage | 5.1% |
| 4 | Yield force | 850kN |
In conclusion using the strand of the embodiment 1 of present invention process, embodiment 2, embodiment 3, embodiment 4 product made from it
Stretch resistance, twisted post-tensioning drag, elongation percentage and yield force are significantly better than the property of the comparative example 1 beyond processing range before closing
It can parameter；Its twisted preceding stretch resistance of existing steel strand wires only has 1780-1860 MPa, elongation percentage 3.5-4.0%, yield force
For 350-400KN.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each component, connection type etc. are all can be
Variation, all equivalents and improvement carried out based on the technical solution of the present invention should not be excluded of the invention
Except protection scope.
Claims (9)
1. a kind of high strength steel strand technique, which is characterized in that steel strand wires are made of 98Si high-carbon hypereutectoid steel, including following
Step:
1) quenched: wire rod first being heated into 15-20s in 860 ± 20 DEG C of temperature, then is cooled to 520 DEG C of formation wire rods, preheating insulation
15-20min；
2) salt bath: wire rod is set in 500-520 DEG C and keeps the temperature 1-1.2min by salt bath cooling bath, salt bath temperature, by molten
The uniform wire rod of temperature after spinning is quickly cooled down by salt in a vacuum；
3) it cleans: being cleaned by the wire rod that salt bath isothermobath comes out by rinse bath, the wire rod temperature after cleaning is controlled in 400-450
℃；It is dried after cleaning.
2. high strength steel strand technique as described in claim 1, which is characterized in that use sodium chloride, chlorination in the salt bath
Calcium, zinc oxide, zinc chloride and zirconium chloride mixture, mixture includes 10-12 parts of sodium chloride, 20-22 wherein by weight
Part calcium chloride, 0.2-0.3 parts of zinc oxide, 0.5-0.6 parts and 0.1-0.2 parts of zinc chloride zirconium chloride.
3. the high strength steel strand technique as described in claims 1 or 2 or 3, which is characterized in that the quenched process is additionally provided with table
Surface treatment process, the surface treatment procedure are as follows: stockline material is removed into hot rolling oxide skin and is cleaned.
4. high strength steel strand technique as claimed in claim 3, which is characterized in that in the surface treatment procedure, removing
It after hot rolling oxide skin and cleaning operation, is cleaned subsequently into rinse bath, descaling bath carries out pickling, enters back into phosphating equipment and carries out phosphorus
Change processing finally enters drying equipment drying, obtains pretreatment wire rod.
5. high strength steel strand technique as claimed in claim 4, which is characterized in that when the phosphating operation, phosphatization temperature is
50-55 DEG C, phosphating time 5-10min.
6. high strength steel strand technique as claimed in claim 5, which is characterized in that be additionally provided with water-bath after the cleaning process
Process, the water-bath process heat the wire rod after cleaning, heating temperature are as follows: 750 DEG C ~ 820 by four-part form heat-treatment furnace
DEG C, water quenching, drying are carried out subsequently into sink, water-bath agent temperature is 85 DEG C, and the water-bath agent includes sodium chloride, precentagewise
Its content is 5%.
7. high strength steel strand technique as claimed in claim 6, which is characterized in that be additionally provided with wire drawing after the water-bath process
Winding process, the wire drawing winding are as follows: the wire rod after cleaning is carried out multi pass drawing, obtain semi-finished product wire rod, finally by drawing
It is wound using take-up mechanism.
8. a kind of high strength steel strand, which is characterized in that the high strength steel strand uses such as claim 1 to 7 any one
High strength steel strand technique described in claim is made.
9. high strength steel strand as claimed in claim 8, which is characterized in that twisted preceding stretch of the high strength steel strand resists
Power is 2400-2500MPa, elongation percentage >=4.5%.
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ID=65165379
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Cited By (2)
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| CN110172562A (en) * | 2019-06-25 | 2019-08-27 | 江苏宝钢精密钢丝有限公司 | A kind of online salt bath heat treatment method of steel wire multifibres |
| CN111206503A (en) * | 2020-01-21 | 2020-05-29 | 浙锚科技股份有限公司 | Wind-rain-vibration-resistant inhaul cable made of high-strength steel strand |
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