CN112159906A - 7-series aluminum alloy and preparation method thereof - Google Patents
7-series aluminum alloy and preparation method thereof Download PDFInfo
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- CN112159906A CN112159906A CN202011069909.4A CN202011069909A CN112159906A CN 112159906 A CN112159906 A CN 112159906A CN 202011069909 A CN202011069909 A CN 202011069909A CN 112159906 A CN112159906 A CN 112159906A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000007670 refining Methods 0.000 claims abstract description 38
- 238000005266 casting Methods 0.000 claims abstract description 33
- 238000005096 rolling process Methods 0.000 claims abstract description 33
- 239000000956 alloy Substances 0.000 claims abstract description 30
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 27
- 230000032683 aging Effects 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000839 emulsion Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000010791 quenching Methods 0.000 claims abstract description 13
- 230000000171 quenching effect Effects 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000007872 degassing Methods 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 238000005275 alloying Methods 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 17
- 239000010936 titanium Substances 0.000 claims description 17
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 11
- 239000000460 chlorine Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 7
- NHYCGSASNAIGLD-UHFFFAOYSA-N chlorine monoxide Inorganic materials Cl[O] NHYCGSASNAIGLD-UHFFFAOYSA-N 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 description 6
- 239000011162 core material Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a preparation method of 7-series aluminum alloy, which comprises the steps of firstly melting an aluminum ingot into aluminum liquid and then carrying out alloying treatment; then degassing, refining and slagging off are carried out; then continuously casting the alloy melt after degassing and refining; straightening the prepared casting blank, heating the casting blank before the casting blank is fed into a rolling mill, lubricating the casting blank by adopting emulsion in the rolling process, and rolling to obtain an aluminum alloy; then, carrying out finish rolling quenching on the aluminum alloy obtained by rolling; and carrying out artificial aging treatment on the aluminum alloy subjected to finish rolling and quenching. The invention adopts artificial aging treatment and mixed gas refining treatment, has high efficiency and low cost, and the prepared 7-series aluminum alloy has stable performance.
Description
Technical Field
The invention relates to the technical field of aluminum alloy materials, in particular to a 7-series aluminum alloy and a preparation method thereof.
Background
At present, with the development of conductor alloying, the application of a novel overhead transmission conductor taking an aluminum alloy material as a conductor material and a reinforcing material is becoming more and more extensive at home and abroad, and representative types of the novel overhead transmission conductor comprise an all-aluminum alloy stranded wire and an aluminum alloy core aluminum stranded wire. The all-aluminum alloy stranded wire is made of the same material, the manufacturing process is very simple and convenient, and the all-aluminum alloy stranded wire has a plurality of advantages in engineering application; compared with the traditional steel-cored aluminum strand, the aluminum alloy-cored aluminum strand can fully utilize the conductivity of the reinforced core aluminum alloy material under the condition of ensuring the strength of the reinforced core material, and simultaneously avoids the electric energy loss caused by the hysteresis action of the steel core. Simultaneously, above two kinds of novel air wire have better corrosion resistance, and the overhead line construction is also more convenient, also has more economic nature when old and useless wire is retrieved in the future. Therefore, all aluminum alloy stranded wires and aluminum alloy core aluminum stranded wires become an important direction for the development of the current overhead power transmission wires.
In the prior art, in the process of preparing the 7-series aluminum alloy, the used refining agent is selected from a solid refining agent or a solid-gas mixed refining agent, and because the reaction of the pure fixed refining agent is slow after use, in the prior art, nitrogen or argon is mostly introduced for refining treatment, but the nitrogen or argon can react with aluminum at 725 ℃ to 730 ℃ to generate a large amount of aluminum oxide inclusions, so the pure refining gas cannot play a good refining effect. Meanwhile, the synergistic effect among various elements in the alloy aluminum alloy is poor, so that the produced aluminum alloy has short service life and poor performance.
In the process of preparing the 7-series aluminum alloy, artificial aging is the key for determining the high-strength aluminum alloy wire, and the aging temperature and time depend on the components of the alloy, the processing deformation, the type of equipment used for wire drawing and the like. The artificial aging heating temperature range is narrow, so the heating is required to be uniform during production.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a 7-series aluminum alloy and a preparation method thereof, wherein artificial aging treatment and mixed gas refining treatment are adopted, the efficiency is high, the cost is low, and meanwhile, the special alloy Ti is utilized to improve the hardness of the aluminum alloy and simultaneously improve the synergistic effect of all components in the alloy, so that the prepared 7-series aluminum alloy has stable performance.
The invention provides a preparation method of a 7-series aluminum alloy, which comprises the following steps:
s1, alloying treatment: melting an aluminum ingot into aluminum liquid, controlling the temperature of the aluminum liquid to be 720-750 ℃, adding a Zn ingot, an Mg ingot, a Si ingot, a Fe ingot, a Cr ingot, a Mn ingot, a Ti ingot, a Ni ingot and a Ce ingot, and uniformly stirring to obtain an alloy melt, wherein the Ti ingot is alloy titanium with a gradually-changing stepped structure inside metal, and the manufacturing method of the alloy titanium comprises the following steps: adopting a titanium alloy Ti-15 Mo-5 Zr-3A 1, grinding and cleaning the surface of the titanium alloy, soaking the titanium alloy in NaOH aqueous solution for 24 hours, cleaning, drying the titanium alloy at 40 ℃ for 24 hours, heating the titanium alloy to 600 ℃ in an electric furnace at the speed of 5 ℃/min, preserving the temperature, cooling the furnace, soaking a sample in NaCl solution with the pH value of 7.40 and the temperature of 36.5 ℃, taking out the sample after 72 hours, cleaning and drying;
s2, degassing and refining: adding mixed gas to refine the alloy melt in the holding furnace, and slagging off;
s3, casting: continuously casting the alloy melt subjected to degassing and refining of S2, wherein the casting temperature is 690-720 ℃, the casting water pressure is 0.20-0.40 MPa, and the temperature of the obtained casting blank is 460-480 ℃;
s4, rolling: straightening the casting blank prepared in the step S3, heating the casting blank before the casting blank is fed into a rolling mill, wherein the feeding temperature is 480-520 ℃, the final rolling temperature is 340-380 ℃, and the aluminum alloy is obtained by adopting emulsion lubrication in the rolling process;
s5, finish rolling and quenching: carrying out finish rolling quenching on the aluminum alloy obtained by S4 rolling;
s6, artificial aging treatment: and (3) carrying out aging treatment on the aluminum alloy subjected to finish rolling quenching of S5.
Preferably, in S1, the impurity content in the aluminum ingot is less than or equal to 0.03%.
Preferably, in S1, the melting speed is 6t/h-10 t/h.
Preferably, the alloy melt in S1 is composed of, by mass: zn: 6 to 6.4 percent; mg: 0.7-0.9%; si: less than or equal to 0.25 percent; fe: less than or equal to 0.2 percent; cr: less than or equal to 0.2 percent; mn: 0.15 to 0.25 percent; ti: less than or equal to 0.15 percent; ni: 0.15 to 0.23 percent; ce: 0.02-0.08%; the balance of Al and other inevitable impurity elements.
Preferably, in S2, the mixed gas is a combination of nitrogen, chlorine and carbon monoxide, wherein the volume of nitrogen is 99.99% of the total volume of the mixed gas.
Preferably, in S2, the refining temperature is 701-719 ℃ and the refining time is 10-15 min.
Preferably, in S3, the casting speed is 8 m/min-10 m/min.
Preferably, in S4, the temperature of the emulsion is 30-40 ℃, the flow rate of the emulsion is 40t/h, and the volume ratio of water to oil in the emulsion is 30-40.
Preferably, in S5, the conditions of finish rolling quenching are as follows: the water temperature is 30-40 ℃, and the water pressure is 0.2-0.4 Mpa.
Preferably, in S6, the temperature of the aging treatment is 152-158 ℃, and the time of the aging treatment is 3.5-4 h.
The invention has the technical effects that:
compared with other aluminum alloy preparation methods, the method provided by the invention has the advantages that during degassing refining, the combined gas of nitrogen, chlorine and carbon monoxide is adopted for refining, and after three gases of nitrogen, chlorine and carbon monoxide are introduced into the die-casting aluminum alloy liquid, AlCl is generated through reaction3And CO2All are floating bubbles, can play a role in adsorption refining and can decompose Al in departments2O3It is mixed with the raw materials, so the refining effect is obvious. Compared with chlorine refining, the refining time of mixed gas refining is saved by half, and the nitrogen is used, so that the corrosion of chlorine to human bodies and equipment is reduced, and the working condition is greatly improved.
Compared with other aluminum alloy preparation methods, the method adopts artificial aging treatment, is uniform in heating, avoids incomplete stress release, effectively saves time and removes residual stress.
Compared with other aluminum alloy preparation methods, the method has the advantages that metal copper is not added in the control of the alloy liquid components, the content of metal magnesium is reasonably controlled, and the metal magnesium is effectively prevented from being burnt by high temperature.
The alloy Ti metal with a special structure of the invention not only has higher Ti density, but also can further improve the synergistic effect.
The invention mainly obtains the 7-series aluminum alloy through smelting, refining, casting and rolling processes and artificial aging. Compared with the traditional process, the 7-series aluminum alloy prepared by the preparation method provided by the invention has the advantages that the tensile strength, the electric conductivity and the elongation are obviously improved, the performance is stable, and the production cost is greatly reduced and the production efficiency is improved on the premise of completely meeting the use requirement of 7003 aluminum alloy.
Detailed Description
Example 1
A preparation method of a 7-series aluminum alloy comprises the following steps:
melting an aluminum ingot into aluminum liquid, controlling the temperature of the aluminum liquid to be 720-750 ℃, adding a Zn ingot, an Mg ingot, a Si ingot, a Fe ingot, a Cr ingot, a Mn ingot, a Ti ingot, a Ni ingot and a Ce ingot, and uniformly stirring to obtain an alloy melt, wherein the Ti ingot is alloy titanium with a gradually-changing stepped structure inside metal, and the manufacturing method of the alloy titanium comprises the following steps: adopting a titanium alloy Ti-15 Mo-5 Zr-3A 1, grinding and cleaning the surface of the titanium alloy, soaking the titanium alloy in NaOH aqueous solution for 24 hours, cleaning, drying the titanium alloy at 40 ℃ for 24 hours, heating the titanium alloy to 600 ℃ in an electric furnace at the speed of 5 ℃/min, preserving the temperature, cooling the furnace, soaking a sample in NaCl solution with the pH value of 7.40 and the temperature of 36.5 ℃, taking out the sample after 72 hours, cleaning and drying;
then adding a combined gas of nitrogen, chlorine and carbon monoxide into the alloy liquid to refine the alloy liquid in the holding furnace and skimming the slag, wherein the refining temperature is 710 ℃, the refining time is 12.5min, and the volume of the nitrogen accounts for 99.99 percent of the total volume of the mixed gas;
then continuously casting the alloy melt after degassing and refining, wherein the casting temperature is 705 ℃, the casting speed is 9m/min, the casting water pressure is 0.3MPa, and the temperature of the obtained casting blank is 470 ℃; straightening the prepared casting blank, heating the casting blank before the casting blank is fed into a rolling mill, wherein the feeding temperature is 500 ℃, the final rolling temperature is 360 ℃, and the aluminum alloy is obtained by adopting emulsion lubrication in the rolling process, wherein the temperature of the emulsion is 35 ℃, the flow rate of the emulsion is 40t/h, and the volume ratio of water to oil in the emulsion is 35;
and then, carrying out finish rolling quenching on the aluminum alloy obtained by rolling, wherein the conditions of the finish rolling quenching are as follows: the water temperature is 35 ℃, and the water pressure is 0.3 Mpa; and then carrying out aging treatment on the aluminum alloy subjected to finish rolling quenching, wherein the temperature of the aging treatment is 155 ℃, and the time of the aging treatment is 3.8 h.
The performance test was performed on the 7-series aluminum alloy obtained in example 1, and the results are shown in the following table. Wherein, the tensile strength and the elongation are subjected to performance tests according to the national standard GB/T228.1-2010; conductivity the conductivity test was carried out according to the national standard GBT 12966-2008.
From the above table, it can be seen that: the main performance indexes of the 7-series aluminum alloy prepared by the invention are as follows: tensile strength was 235MPa, conductivity was 59% IACS, and elongation was 2.0%.
Compared with other aluminum alloy preparation methods, the method adopts the combined gas of nitrogen, chlorine and carbon monoxide for refining during degassing refining, and after three gases of nitrogen, chlorine and carbon monoxide are introduced into the die-casting aluminum alloy liquid, AlCl is generated through reaction3And CO2All are floating bubbles, can play a role in adsorption refining and can decompose Al in departments2O3It is mixed with the raw materials, so the refining effect is obvious. Compared with chlorine refining, the refining time of mixed gas refining is saved by half, and the nitrogen is used, so that the corrosion of chlorine to human bodies and equipment is reduced, and the working condition is greatly improved.
The artificial aging treatment is adopted, the heating is uniform, the incomplete stress release is avoided, the time is effectively saved, and the residual stress is eliminated. In the control of the components of the alloy liquid, metal copper is not added, the content of metal magnesium is reasonably controlled, and the metal magnesium is effectively prevented from being burnt by high temperature.
The alloy Ti metal with a special structure of the invention not only has higher Ti density, but also can further improve the synergistic effect. The invention mainly obtains the 7-series aluminum alloy through smelting, refining, casting and rolling processes and artificial aging. Compared with the traditional process, the 7-series aluminum alloy prepared by the preparation method provided by the invention has the advantages that the tensile strength, the electric conductivity and the elongation are obviously improved, the performance is stable, and the production cost is greatly reduced and the production efficiency is improved on the premise of completely meeting the use requirement of 7003 aluminum alloy.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A preparation method of a 7-series aluminum alloy is characterized by comprising the following steps:
s1, alloying treatment: melting an aluminum ingot into aluminum liquid, controlling the temperature of the aluminum liquid to be 720-750 ℃, adding a Zn ingot, an Mg ingot, a Si ingot, a Fe ingot, a Cr ingot, a Mn ingot, a Ti ingot, a Ni ingot and a Ce ingot, and uniformly stirring to obtain an alloy melt, wherein the Ti ingot is alloy titanium with a gradually-changing stepped structure inside metal, and the manufacturing method of the alloy titanium comprises the following steps: adopting a titanium alloy Ti-15 Mo-5 Zr-3A 1, grinding and cleaning the surface of the titanium alloy, soaking the titanium alloy in NaOH aqueous solution for 24 hours, cleaning, drying the titanium alloy at 40 ℃ for 24 hours, heating the titanium alloy to 600 ℃ in an electric furnace at the speed of 5 ℃/min, preserving the temperature, cooling the furnace, soaking a sample in NaCl solution with the pH value of 7.40 and the temperature of 36.5 ℃, taking out the sample after 72 hours, cleaning and drying;
s2, degassing and refining: adding mixed gas to refine the alloy melt in the holding furnace, and slagging off;
s3, casting: continuously casting the alloy melt subjected to degassing and refining of S2, wherein the casting temperature is 690-720 ℃, the casting water pressure is 0.20-0.40 MPa, and the temperature of the obtained casting blank is 460-480 ℃;
s4, rolling: straightening the casting blank prepared in the step S3, heating the casting blank before the casting blank is fed into a rolling mill, wherein the feeding temperature is 480-520 ℃, the final rolling temperature is 340-380 ℃, and the aluminum alloy is obtained by adopting emulsion lubrication in the rolling process;
s5, finish rolling and quenching: carrying out finish rolling quenching on the aluminum alloy obtained by S4 rolling;
s6, artificial aging treatment: and (3) carrying out aging treatment on the aluminum alloy subjected to finish rolling quenching of S5.
2. The method of producing a 7-series aluminum alloy according to claim 1, wherein the melting rate in S1 is 6t/h to 10 t/h.
3. The method for preparing a 7-series aluminum alloy according to claim 1, wherein the alloy melt in S1 has a composition, in terms of mass percent, of: zn: 6 to 6.4 percent; mg: 0.7-0.9%; si: less than or equal to 0.25 percent; fe: less than or equal to 0.2 percent; cr: less than or equal to 0.2 percent; mn: 0.15 to 0.25 percent; ti: less than or equal to 0.15 percent; ni: 0.15 to 0.23 percent; ce: 0.02-0.08%; the balance of Al and other inevitable impurity elements.
4. The method of claim 1, wherein the mixed gas in S2 is a combination of nitrogen, chlorine and carbon monoxide, wherein the volume of nitrogen is 99.99% of the total volume of the mixed gas.
5. The method for producing a 7-series aluminum alloy according to claim 1, wherein in S2, the refining temperature is 701 to 719 ℃ and the refining time is 10 to 15 min.
6. The method for producing a 7-series aluminum alloy according to claim 1, wherein the casting speed in S3 is 8 m/min to 10 m/min.
7. The method for producing a 7-series aluminum alloy according to claim 1, wherein the temperature of the emulsion in S4 is 30 ℃ to 40 ℃, the flow rate of the emulsion is 40t/h, and the volume ratio of water to oil in the emulsion is 30 to 40.
8. The method for producing a 7-series aluminum alloy according to claim 1, wherein in S5, the conditions for finish rolling quenching are as follows: the water temperature is 30-40 ℃, and the water pressure is 0.2-0.4 Mpa.
9. The method for preparing a 7-series aluminum alloy according to claim 1, wherein the aging temperature in S6 is 152-158 ℃ and the aging time is 3.5-4 h.
10. A 7-series aluminum alloy characterized by being produced by the production method of a 7-series aluminum alloy according to any one of claims 1 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120138450A (en) * | 2025-03-13 | 2025-06-13 | 潍坊林然幕墙工程有限公司 | A kind of corrosion-resistant aluminum alloy profile and preparation method thereof |
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| 陆树荪 等编著: "《有色铸造合金及熔炼》", 31 May 1983, 国防工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120138450A (en) * | 2025-03-13 | 2025-06-13 | 潍坊林然幕墙工程有限公司 | A kind of corrosion-resistant aluminum alloy profile and preparation method thereof |
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