CN110885938A - Cu-Ni-Sn alloy strip foil for 5G communication and preparation method thereof - Google Patents
Cu-Ni-Sn alloy strip foil for 5G communication and preparation method thereof Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- 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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- 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
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Abstract
The invention relates to a Cu-Ni-Sn alloy strip foil for 5G communication and a preparation method thereof, wherein the Cu-Ni-Sn alloy strip foil comprises the following raw material components: 8.5-9.5% of nickel, 5.5-6.5% of tin, 0.2-0.5% of manganese, 0.1-0.3% of zinc and the balance of copper and impurities, melting the weighed copper and nickel, covering with charcoal, sequentially adding manganese, tin and zinc, heating to 1300-1330 ℃, stirring and melting, covering with slagging charcoal, standing the converter, and covering with slagging charcoal again; and performing casting, homogenizing annealing treatment, face milling, cold rolling cogging, intermediate solution treatment, intermediate rolling, intermediate solution treatment and finished product rolling by adopting a reverse push-pull-stop blank drawing mode, and processing into a foil with the thickness of 0.04-0.1 mm. The Cu-Ni-Sn alloy strip foil keeps the elasticity, the wear resistance and the corrosion resistance of the Cu-Ni-Sn copper alloy in the prior art, simultaneously improves the formability, the higher conductivity and the excellent shielding property, can realize the industrial production of the Cu-Ni-Sn alloy strip foil for 5G communication, replaces the import, fills the domestic blank, and promotes the development requirement of the copper processing industry at the present stage.
Description
Technical Field
The invention relates to the technical field of copper alloy materials, in particular to a Cu-Ni-Sn alloy strip foil for 5G communication and a preparation method thereof.
Background
With the development of aerospace and 5G communication electronic industries, the requirements on materials are higher and higher, and the materials are developed towards thinness, lightness and smallness. The high-strength high-elasticity copper alloy has the excellent characteristics of high strength, good elasticity, fatigue resistance, small elastic hysteresis, corrosion resistance and the like, is widely used for manufacturing industries such as electronics, electricity, communication, instruments and the like, and is widely applied to manufacturing various elastic reeds, electric contacts, spot welding poles, explosion-proof tools and the like. Different application scenes require different performances of materials, and as an elastic material necessary for a 5G communication base station, the elastic material has good elasticity, and must have excellent shielding performance and good conductive performance to play roles in transmitting signals and shielding interference.
At present, beryllium bronze and environment-friendly copper alloy are used as materials applied to domestic 5G communication base station equipment, have good elasticity, shielding performance and good conductivity, but need to rely on import, and no enterprise for producing the materials exists in China. Because beryllium bronze is harmful to human bodies and the environment, beryllium copper is called for and forbidden to use internationally, although the using amount of the beryllium copper in the market is not reduced all the time, the application of the beryllium copper in the communication field is increasingly prominent and is not environment-friendly along with the improvement of the living standard of people, and the beryllium bronze is obviously replaced; although the environment-friendly copper alloy can also meet the requirements of the domestic communication industry, the cost is greatly improved due to the import of materials. Aiming at increasingly violent international trade friction, the change of the pace of people is not slow, and the application of the alloy in 5G communication industry for replacing beryllium bronze and environment-friendly copper alloy is trending.
Some domestic manufacturers are also gradually searching for methods for substituting beryllium copper and environment-friendly copper alloy, mainly applied to shielding EMI (electro-magnetic interference) elastic sheets of 5G communication equipment, and besides the performance of the elastic sheets can meet the requirements of customers, key technologies in the production process are also bottlenecks which restrict domestic copper processing enterprises, such as key technologies of smelting and casting tissue segregation, high-temperature homogenization treatment, air cushion furnace annealing of ultrathin strips and the like, so that no other enterprise breakthrough exists in China at present, and industrial production cannot be realized. Therefore, the developed alloy foil for 5G communication can realize the industrial production of 0.04-0.1 mm foil strips besides meeting the performance requirement of EMI shielding shrapnel of communication equipment, replace import and fill up the blank in China so as to promote the development of the copper industry at the present stage and solve the technical problem which needs to be solved urgently by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a Cu-Ni-Sn alloy strip foil for 5G communication and a preparation method thereof, wherein the copper alloy strip foil keeps the elasticity, wear resistance and corrosion resistance of Cu-Ni-Sn copper alloy in the prior art, has good formability, higher conductivity and excellent shielding property, and can meet the industrial development requirement at the present stage. The invention also aims to provide a preparation method of the Cu-Ni-Sn alloy strip foil for 5G communication, which can realize the industrial production of the Cu-Ni-Sn alloy strip foil for 5G communication, replace import and fill up the blank in China so as to promote the development requirement of the copper processing industry at the present stage.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a Cu-Ni-Sn alloy strip foil for 5G communication comprises the following components in percentage by weight: 8.5-9.5% of nickel, 5.5-6.5% of tin, 0.2-0.5% of manganese, 0.1-0.3% of zinc, and the balance of Cu and impurities; the content of the impurities is lower than 0.2 percent; the preferable range is 8.6-9.2% of nickel, 5.8-6.2% of tin, 0.25-0.3% of manganese, 0.1-0.15% of zinc, and the balance of copper and impurities; the content of the impurities is lower than 0.2 percent; the above-mentioned various alloying elements do not act in isolation, and their effects are mutual, and the amount of any one of them brings about a change in the properties of the alloy. Each element has independent function, but after the elements are combined with each other, the elements are mutually excited and mutually promoted, the synergistic effect is very obvious, and the comprehensive performance of the copper alloy is obviously improved.
Furthermore, the thickness of the Cu-Ni-Sn alloy strip foil is 0.04-0.1 mm.
The invention discloses a preparation method of a Cu-Ni-Sn alloy strip foil for 5G communication, which comprises the following steps:
(1) smelting: melting the weighed copper and nickel, adding charcoal to cover after melting, adding manganese, tin and zinc in sequence after fully stirring, heating to 1300-1330 ℃, stirring for melting, slagging off and adding charcoal to cover after melting, standing the converter, and slagging off and covering with charcoal again after the converter;
(2) horizontal continuous casting: performing casting on the raw material in the step (1) by adopting a back-push-pull-stop blank drawing mode, wherein the melt temperature is 1250-1290 ℃ during drawing, the melt temperature is 1200-1250 ℃ during normal casting, the drawing speed is 40-60 mm/min, the back-push range is 0.5-2.5 mm, the normal casting speed is 100-120 mm/min, the outlet temperature of a casting blank is 200-350 ℃, and the casting blank is drawn and cast into a coil blank;
(3) quenching treatment; carrying out homogenizing annealing on the coil blank prepared in the step (2), wherein the homogenizing annealing temperature is 800-880 ℃, the annealing time is 10-15 h, and carrying out rapid quenching treatment after the annealing to obtain a casting blank;
(4) milling a surface: milling the casting blank processed in the step (3), wherein the thickness of the upper and lower surfaces of the milled blank is 0.5-1.0 mm;
(5) cold rolling and cogging: performing cold rolling and cogging on the casting blank processed in the step (4), wherein 6-7 passes are counted, the first-pass reduction is controlled to be 10-15%, and the total reduction rate is less than 70%;
(6) intermediate solid solution: carrying out solid solution treatment on the casting blank treated in the step (5) at 700-800 ℃ for 5-10 h, rapidly quenching after treatment, cooling for 2-3 h, and repeatedly treating for 2-3 times;
(7) intermediate rolling: carrying out medium rolling on the casting blank treated in the step (6), controlling the first-pass machining rate to be 25-35%, and sequentially reducing the first-pass machining rate to ensure that the total machining rate is not more than 65%;
(8) intermediate solid solution: annealing the rolled strip treated in the step (7) in an annealing furnace, wherein the annealing temperature is 700-780 ℃, the annealing speed is 5-20 m/min, and the rolling strip is repeatedly treated for 4 times;
(9) rolling a finished product: and (3) rolling the finished product of the strip processed in the final step (8), wherein the processing rate is controlled to be 15-30%, and the thickness is 0.04-0.1 mm.
Further, the manganese and the zinc in the step (1) are manganese and zinc coated by copper sheets; manganese and zinc are coated with copper scale to increase weight and reduce contact damage from oxygen.
Further, the water inlet temperature of the cooling water in the drawing casting process in the step (2) is 10-20 ℃, the water outlet temperature of the cooling water is 30-50 ℃, and the water inlet pressure of the cooling water is 0.2-0.45 Mpa.
Further, the coil blank in the step (2) has the specification of 14 multiplied by 450mm and the coil weight is 3 to 4 tons.
Further, the annealing furnace in the step (8) controls the rotating speed of a fan in a heating area in the furnace to be 500-700 rpm, the rotating speed of a fan in a cooling area to be 200-400 rpm, and the tension in the furnace area to be 10-30N/mm2。
Tests prove that the Cu-Ni-Sn alloy strip foil prepared by the method has the tensile strength sigmab700MPa at 480 ℃, 650MPa at yield strength, 220 HV at 160 ℃, 7% or more of plastic elongation delta, 12% or more of IACS at conductivity, 90-degree bending: the transverse direction is 0.5, the longitudinal direction is 1.0, the shielding performance is more than or equal to 50dB, and the product completely meets the requirement of domestic 5G communication base station equipment.
Has the advantages that:
(1) the invention aims to provide a Cu-Ni-Sn alloy strip foil for 5G communication, which keeps the elasticity, wear resistance and corrosion resistance of Cu-Ni-Sn copper alloy in the prior art, improves the formability, higher conductivity and excellent shielding property, and can meet the industrial development requirement at the present stage;
(2) the invention provides a preparation method of a Cu-Ni-Sn alloy strip foil for 5G communication, which can realize the industrial production of the Cu-Ni-Sn alloy strip foil for 5G communication, replace import and fill up the blank in China so as to promote the development requirement of the copper processing industry at the present stage.
The specific implementation mode is as follows:
for a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate the features and advantages of the invention and not to limit the scope of the claims.
The invention comprises the following raw materials: electrolytic copper, pure nickel, pure tin, manganese and zinc coated by copper sheets.
Example 1
(1) Smelting: melting weighed copper and nickel in a smelting furnace, adding charcoal to cover and stirring after fully melting, sequentially adding manganese (coated by copper sheets), tin and zinc (coated by copper sheets), heating to 1330 ℃, stirring and melting, slagging off and covering by charcoal after melting, standing for preparation, transferring into a heat preservation furnace, slagging off again after a converter, and calcining the charcoal to cover;
(2) horizontal continuous casting: performing casting by adopting a back-push-pull-stop blank drawing mode, wherein the melt temperature is 1260 ℃ during drawing, the melt temperature is 1230 ℃ during normal casting, the drawing speed is 50mm/min, the back-push stroke is 1.5mm, the normal casting speed is 110mm/min, the outlet temperature of a casting blank is 300 ℃, performing casting into a coiled blank, the specification of the coiled blank is 14 x 450mm, and the coil weight is 3.45 tons; in the process of drawing casting, the water inlet temperature of the cooling water is 15 ℃, the water outlet temperature of the cooling water is 40 ℃, and the water inlet pressure of the cooling water is 0.35 Mpa;
(3) quenching treatment; placing the coil blank prepared in the step (2) in a high-temperature trolley furnace under nitrogen protection, carrying out homogenization annealing treatment at 850 ℃ for 12h to obtain a solid solution with uniform tissue, and carrying out rapid quenching treatment after annealing;
(4) milling a surface: milling the casting blank treated in the step (3), wherein the thickness of the upper and lower surfaces of the milled blank is 0.6mm, and eliminating the surface defects and inverse segregation of the casting blank;
(5) cold rolling and cogging: performing cold rolling and cogging on the casting blank treated in the step (4), controlling the first pass reduction rate to be 12%, totaling 6 passes, and ensuring that the total processing deformation is 65%;
(6) intermediate solid solution: placing the casting blank treated in the step (5) in a high-temperature trolley furnace under the protection of nitrogen, carrying out annealing treatment for 8 hours at 750 ℃, rapidly quenching after treatment, cooling for 2 hours, and repeatedly treating for 2 times;
(7) intermediate rolling: carrying out medium rolling on the casting blank treated in the step (6), controlling the first pass machining rate to be 29%, sequentially reducing, and repeatedly treating for 5 times, wherein the total machining rate is not more than 55%;
(8) intermediate solid solution: annealing the rolled strip processed in the step (7) in a high-temperature trolley furnace, and controlling the rotating speed of a fan in a heating area in the furnace to be 600rpm, the rotating speed of a fan in a cooling area to be 300rpm and the tension in the furnace area to be 20N/mm2Annealing at 750 deg.C and 15m/min for 4 times;
(9) rolling a finished product: and (3) rolling the finished product of the strip processed in the final step (8), wherein the processing rate is controlled to be 20%, the thickness is 0.04-0.1 mm, and the mass percentage of total impurities in the obtained finished product is lower than 0.2%.
Example 2
(1) Smelting: melting weighed copper and nickel in a smelting furnace, adding charcoal to cover and stirring after fully melting, sequentially adding manganese (coated by copper sheets), tin and zinc (coated by copper sheets), heating to 1300-1330 ℃, stirring for melting, slagging off and adding charcoal to cover after melting, standing for preparing a converter, slagging off again after the converter, and calcining the charcoal to cover;
(2) horizontal continuous casting: performing casting by adopting a back-push-pull-stop blank drawing mode, wherein the melt temperature is 1250-1290 ℃ during drawing, the melt temperature is 1200-1250 ℃ during normal casting, the drawing speed is 40-60 mm/min, the back-push pushing range is 0.5-2.5 mm, the normal casting speed is 100-120 mm/min, the outlet temperature of a casting blank is 200-350 ℃, the blank is drawn and cast into a coil blank, the specification of the coil blank is 14 multiplied by 450mm, and the coil weight is 3-4 tons; the water inlet temperature of the cooling water in the drawing casting process is 10-20 ℃, the water outlet temperature of the cooling water is 30-50 ℃, and the water inlet pressure of the cooling water is 0.2-0.45 Mpa;
(3) quenching treatment; placing the coil blank prepared in the step (2) in a high-temperature trolley furnace under the protection of nitrogen, carrying out homogenization annealing treatment at the treatment temperature of 800-880 ℃ for 10-15 h to obtain a solid solution with a uniform tissue, and carrying out rapid quenching treatment after annealing;
(4) milling a surface: milling the casting blank treated in the step (3), wherein the thickness of the upper and lower surfaces of the milled blank is 0.5-1.0mm, and eliminating the surface defects and reverse segregation of the casting blank;
(5) cold rolling and cogging: performing cold rolling and cogging on the casting blank treated in the step (4), controlling the first-pass reduction rate to be 10-15%, totaling 6-7 passes, and ensuring that the total processing deformation is less than 70%;
(6) intermediate solid solution: placing the casting blank treated in the step (5) in a high-temperature trolley furnace under nitrogen protection, carrying out annealing treatment for 5-10 hours at 700-800 ℃, rapidly quenching after treatment, cooling for 2-3 hours, and repeatedly treating for 2-3 times;
(7) intermediate rolling: carrying out medium rolling on the casting blank treated in the step (6), controlling the first-pass machining rate to be 25-35%, sequentially reducing, and repeatedly treating for 4-6 times, wherein the total machining rate is not more than 65%;
(8) intermediate solid solution: annealing the rolled strip processed in the step (7) in a high-temperature trolley furnace, wherein the annealing temperature is 700-780 ℃, the annealing speed is 5-20 m/min, and the annealing is carried out for 4 times;
(9) rolling a finished product: and (3) rolling the finished product of the strip processed in the final step (8), wherein the processing rate is controlled to be 15-30%, the thickness is 0.04-0.1 mm, and the mass percentage of total impurities in the obtained finished product is lower than 0.2%.
Example 3
(1) Smelting: melting weighed copper and nickel in a smelting furnace, adding charcoal to cover and stirring after fully melting, sequentially adding manganese (coated by copper sheets), tin and zinc (coated by copper sheets), heating to 1300-1330 ℃, stirring for melting, slagging off and adding charcoal to cover after melting, standing for preparing a converter, slagging off again after the converter, and calcining the charcoal to cover;
(2) horizontal continuous casting: performing casting by adopting a back-push-pull-stop blank drawing mode, wherein the melt temperature is 1250-1290 ℃ during drawing, the melt temperature is 1200-1250 ℃ during normal casting, the drawing speed is 40-60 mm/min, the back-push pushing range is 0.5-2.5 mm, the normal casting speed is 100-120 mm/min, the outlet temperature of a casting blank is 200-350 ℃, the blank is drawn and cast into a coil blank, the specification of the coil blank is 14 multiplied by 450mm, and the coil weight is 3-4 tons; the water inlet temperature of the cooling water in the drawing casting process is 10-20 ℃, the water outlet temperature of the cooling water is 30-50 ℃, and the water inlet pressure of the cooling water is 0.2-0.45 Mpa;
(3) quenching treatment; placing the coil blank prepared in the step (2) in a high-temperature trolley furnace under the protection of nitrogen, carrying out homogenization annealing treatment at the treatment temperature of 800-880 ℃ for 10-15 h to obtain a solid solution with a uniform tissue, and carrying out rapid quenching treatment after annealing;
(4) milling a surface: milling the casting blank treated in the step (3), wherein the thickness of the upper and lower surfaces of the milled blank is 0.5-1.0mm, and eliminating the surface defects and reverse segregation of the casting blank;
(5) cold rolling and cogging: performing cold rolling and cogging on the casting blank treated in the step (4), controlling the first-pass reduction rate to be 10-15%, totaling 6-7 passes, and ensuring that the total processing deformation is less than 70%;
(6) intermediate solid solution: placing the casting blank treated in the step (5) in a high-temperature trolley furnace under nitrogen protection, carrying out annealing treatment for 5-10 hours at 700-800 ℃, rapidly quenching after treatment, cooling for 2-3 hours, and repeatedly treating for 2-3 times;
(7) intermediate rolling: carrying out medium rolling on the casting blank treated in the step (6), controlling the first-pass machining rate to be 25-35%, sequentially reducing, and repeatedly treating for 4-6 times, wherein the total machining rate is not more than 65%;
(8) intermediate solid solution: annealing the rolled strip processed in the step (7) in a high-temperature trolley furnace, wherein the annealing temperature is 700-780 ℃, the annealing speed is 5-20 m/min, and the annealing is carried out for 4 times;
(9) rolling a finished product: and (3) rolling the finished product of the strip processed in the final step (8), wherein the processing rate is controlled to be 15-30%, the thickness is 0.04-0.1 mm, and the mass percentage of total impurities in the obtained finished product is lower than 0.2%.
Analysis of respective Components of Cu-Ni-Sn alloy tape foils prepared in examples 1 to 3
Test results of product performance of Cu-Ni-Sn alloy strip foil prepared in examples 1 to 3
The Cu-Ni-Sn alloy strip foil product prepared by the invention completely meets the requirement of domestic 5G communication base station equipment.
Claims (8)
1. The Cu-Ni-Sn alloy strip foil for 5G communication is characterized by comprising the following components in percentage by weight: 8.5-9.5% of nickel, 5.5-6.5% of tin, 0.2-0.5% of manganese, 0.1-0.3% of zinc, and the balance of copper and impurities; the content of the impurities is less than 0.2 percent.
2. The Cu-Ni-Sn alloy strip foil for 5G communication according to claim 1, which comprises the following components in percentage by weight: 8.6-9.2% of nickel, 5.8-6.2% of tin, 0.25-0.3% of manganese, 0.1-0.15% of zinc, and the balance of copper and impurities; the content of the impurities is less than 0.2 percent.
3. The Cu-Ni-Sn alloy tape foil for 5G communication according to claim 1, wherein the thickness of the Cu-Ni-Sn alloy tape foil is 0.04 to 0.1 mm.
4. A method for producing a Cu-Ni-Sn alloy strip foil for 5G communication according to any one of claims 1 to 3, comprising the steps of:
(1) smelting: melting the weighed copper and nickel, adding charcoal to cover after melting, adding manganese, tin and zinc in sequence after fully stirring, heating to 1300-1330 ℃, stirring for melting, slagging off and adding charcoal to cover after melting, standing the converter, and slagging off and covering with charcoal again after the converter;
(2) horizontal continuous casting: performing casting on the raw material in the step (1) by adopting a back-push-pull-stop blank drawing mode, wherein the melt temperature is 1250-1290 ℃ during drawing, the melt temperature is 1200-1250 ℃ during normal casting, the drawing speed is 40-60 mm/min, the back-push range is 0.5-2.5 mm, the normal casting speed is 100-120 mm/min, the outlet temperature of a casting blank is 200-350 ℃, and the casting blank is drawn and cast into a coil blank;
(3) quenching treatment; carrying out homogenizing annealing on the coil blank prepared in the step (2), wherein the homogenizing annealing temperature is 800-880 ℃, the annealing time is 10-15 h, and carrying out rapid quenching treatment after the annealing to obtain a casting blank;
(4) milling a surface: milling the casting blank processed in the step (3), wherein the thickness of the upper and lower surfaces of the milled blank is 0.5-1.0 mm;
(5) cold rolling and cogging: performing cold rolling and cogging on the casting blank processed in the step (4), wherein 6-7 passes are counted, the first-pass reduction is controlled to be 10-15%, and the total reduction rate is less than 70%;
(6) intermediate solid solution: carrying out solid solution treatment on the casting blank treated in the step (5) at 700-800 ℃ for 5-10 h, rapidly quenching after treatment, cooling for 2-3 h, and repeatedly treating for 2-3 times;
(7) intermediate rolling: carrying out medium rolling on the casting blank treated in the step (6), controlling the first-pass machining rate to be 25-35%, and sequentially reducing the first-pass machining rate to ensure that the total machining rate is not more than 65%;
(8) intermediate solid solution: annealing the rolled strip treated in the step (7) in an annealing furnace, wherein the annealing temperature is 700-780 ℃, the annealing speed is 5-20 m/min, and the rolling strip is repeatedly treated for 4 times;
(9) rolling a finished product: and (3) rolling the finished product of the strip processed in the final step (8), wherein the processing rate is controlled to be 15-30%, and the thickness is 0.04-0.1 mm.
5. The method according to claim 4, wherein the manganese and zinc in step (1) are manganese and zinc coated with copper sheet; manganese and zinc are coated with copper scale to increase weight and reduce contact damage from oxygen.
6. The preparation method according to claim 4, wherein the water inlet temperature of the cooling water in the drawing and casting process in the step (2) is 10 ℃ to 20 ℃, the water outlet temperature of the cooling water is 30 ℃ to 50 ℃, and the water inlet pressure of the cooling water is 0.2 MPa to 0.45 MPa.
7. The method according to claim 4, wherein the coil blank in the step (2) has a size of 14 x 450mm and a coil weight of 3 to 4 tons.
8. The preparation method according to claim 4, wherein the annealing furnace in the step (8) controls the fan speed of the heating zone in the furnace to be 500-700 rpm, the fan speed of the cooling zone to be 200-400 rpm, and the tension in the furnace zone to be 10-30N/mm2。
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| CN115786765A (en) * | 2022-11-22 | 2023-03-14 | 中色奥博特铜铝业有限公司 | High-strength high-elasticity copper alloy foil and processing and preparation method thereof |
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| CN115896539A (en) * | 2022-12-28 | 2023-04-04 | 北冶功能材料(江苏)有限公司 | Ultrahigh-strength and fracture-resistant copper-nickel-tin alloy foil and manufacturing method thereof |
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