CN110653258A - Production method of stainless steel and copper composite coiled material - Google Patents
Production method of stainless steel and copper composite coiled material Download PDFInfo
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- CN110653258A CN110653258A CN201910905351.XA CN201910905351A CN110653258A CN 110653258 A CN110653258 A CN 110653258A CN 201910905351 A CN201910905351 A CN 201910905351A CN 110653258 A CN110653258 A CN 110653258A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
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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
- C21D1/26—Methods of annealing
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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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/221—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by cold-rolling
Abstract
The invention relates to a production method of a stainless steel and copper composite coiled material, belonging to the technical field of stainless steel band composite copper strip materials. It mainly comprises the following steps: the method comprises the steps of raw material texturing surface treatment, cold composite rolling, diffusion annealing after composite, finish rolling, flattening, slitting and packaging to obtain a finished product. The invention has simple manufacturing process, wide raw material sources and low manufacturing cost, can effectively improve the heat dissipation problem of single metal materials, and can replace copper and copper alloy materials in the occasions of electronic appliances, automobile radiators, oil coolers, water tanks and the like.
Description
Technical Field
The invention relates to the technical field of stainless steel strips and copper composite materials, in particular to a production method of a stainless steel and copper composite coiled material.
Background
The 316L stainless steel and T2 copper cold composite board is a novel bimetallic high-efficiency heat-dissipation composite material which takes T2 copper as a substrate and is compounded with a stainless steel layer on a single surface or double surfaces. The stainless steel has bright surface and strength, and also has good extensibility, thermal conductivity, corrosion resistance and wear resistance of copper.
316L stainless steel, for pipes, heat exchangers and other industrial materials. The stainless steel has the characteristics of large heat conductivity coefficient, small expansion coefficient, good oxidation resistance, excellent stress corrosion resistance, good welding performance and the like, and is a common general stainless steel.
T2 copper has good electric conductivity, heat conductivity, corrosion resistance and processability, and can be welded and soldered. The copper content is more than 99.9%.
Common production methods of bimetal composite plates can be roughly divided into: explosion cladding, hot rolling cladding, cold rolling cladding, and the like. The explosion cladding utilizes high-pressure pulse load generated when explosives explode to realize metallurgical bonding of dissimilar materials, is commonly used for producing single-sided composite boards, and uses the explosives as energy sources to generate huge ground sounds and shock waves, thereby polluting and stimulating the surrounding environment and people. The hot rolling compounding needs to prevent the oxidation of an interface during heating, the process is complex, vacuum or welding sealing is needed, the thickness and the layer thickness ratio of a product are difficult to control, and the hot rolling compounding method is generally suitable for blank production. The cold rolling composite process started to be used for industrial production of composite coils in the 50 s of the 20 th century, with precise dimensions and high efficiency, but with low and unstable bonding strength. In the process of the traditional explosive and hot-rolled composite plate strip material, two different materials are combined into a whole, single-side and double-side combination can be realized, the composite layer is 10-20% of the total thickness generally, and the base layer is 80-90% generally, so that the produced steel-copper composite material is strong in combination fastness and not easy to layer. However, in the continuous production process, the problems that the steel layer on the end face of the composite material is easy to rust, the thickness of the composite layer is uneven and the like cannot meet the requirements of current market customers.
Disclosure of Invention
The invention aims to overcome the defects of the traditional composite material, thereby providing a continuous normal-temperature cold compounding production method, effectively improving the problems of rusting and oxidation of the end surface of a composite plate, single metal heat dissipation, welding and the like, and providing a novel composite material required by the market.
According to the technical scheme provided by the invention, the production method of the stainless steel and copper composite coiled material comprises the following specific steps:
(1) and performing raw material texturing surface treatment: the raw materials comprise a stainless steel coil and a copper coil,
wherein the surface treatment of the stainless steel coil is as follows: adopting an automatic strip grinding unit to grind the composite surface of the stainless steel coil by using an abrasive belt;
the surface treatment of the copper coil is as follows: adopting an automatic strip rolling and polishing unit, and polishing the front and back surfaces of the copper roll by using an abrasive belt;
(2) and composite rolling production:
the base plate adopts a cold-rolled copper coil, the composite plate is a cold-rolled stainless steel coil, the two metal materials are synchronously compounded and rolled, the stainless steel and the copper are not subjected to any heat treatment in the rolling process, the rolling deformation rate is more than 40 percent, and double-layer or three-layer compounding is carried out as required;
(3) and diffusion annealing: the rolled composite coil is subjected to recovery and recrystallization of a cold deformation layer and diffusion annealing of an alloy layer, a continuous annealing furnace is adopted in the annealing mode, and ammonia decomposition gas is used in the furnace atmosphere;
(4) and leveling treatment: leveling the composite material subjected to diffusion annealing under a leveling machine;
(5) and stretch bending and straightening: carrying out stretch bending and straightening treatment on the flattened stainless steel-copper composite material;
(6) and carrying out fixed-length slitting on the composite coil subjected to stretch bending and straightening.
Further, the air conditioner is provided with a fan,
in the step (1), when the stainless steel coil is polished, a 316L stainless steel coil is adopted as the copper coil, an abrasive belt made of silicon carbide is used, the abrasive belt is 120-mesh in granularity, and the polishing depth is 0.02-0.05 mm;
selecting a T2 copper roll as the copper roll, using an abrasive belt made of silicon carbide, selecting a 40-mesh particle size as the abrasive belt, and polishing the depth to be 0.05-0.08 mm;
in the step (2), the width of the copper coil is 300-600 mm, and the thickness of the copper coil is 1.5-5 mm; the composite plate is a 316L cold-rolled stainless steel coil, the width of the composite plate is 300-600 mm, and the thickness of the composite plate is 0.2-0.5 mm;
in the step (3), in order to ensure the diffusion annealing of the copper and the stainless steel, the 316L stainless steel is generally heated to about 1000 ℃ and ~ 1030 ℃ and rapidly cooled, the strength is 380-500MPa, and the elongation is more than 25 percent;
in the step (4), the leveling pressure is 180-200 tons, and the leveling speed is 30-60 m/min;
in the step (5), the speed is 20-50 m/min, and the elongation is controlled within 3%;
in the step (6), the minimum strip width is 20mm, and the width tolerance is +/-0.10.
Has the advantages that:
the stainless steel copper composite coil has the advantages of simple manufacturing process, wide raw material source and low production cost, can effectively make up for the defects of composite materials in the current market, has strong heat conduction, heat dissipation and corrosion resistance, does not rust on the end surface, and can meet the requirements of electronic appliances, oil coolers, heat dissipation water tanks and the like in the automobile industry.
Detailed Description
The invention will now be further described with reference to specific examples.
The raw materials adopted in the embodiment of the invention are purchased from the market, and the adopted equipment is a conventional rolling unit, and comprises a grinding machine, a compound rolling mill, a bell-type annealing furnace, a leveling machine, a straightening machine and the like which are connected into a unit. In the following examples, stainless steel and copper composite coils, which are heat radiating materials, were produced.
The first embodiment is as follows: a production method of a stainless steel and copper composite coiled material;
the method comprises the following steps: the composition proportion is calculated according to the weight ratio:
the substrate is a T2 copper roll, the width of the substrate is 360mm, and the thickness of the substrate is 2.5 mm; the composite upper and lower layers are made of 316L stainless steel coils, the width of the stainless steel coils is 360mm, and the thickness of the stainless steel coils is 0.3 mm; the weight of a stainless steel single coil is 500Kg, and the weight of a middle layer copper coil is 4600 Kg;
1. respectively placing a stainless steel coil and a copper coil on an upper uncoiler, a middle uncoiler and a lower uncoiler, simultaneously carrying out surface polishing treatment on three layers of metal, wherein the rotating speed of a polisher is 1600 revolutions per minute, completely polishing a composite surface and the polishing depth is proper, the polishing depth of the stainless steel is 0.02mm, and the polishing depth of the copper strip is 0.06 mm;
2. feeding the two polished metals into a compounding mill, setting the tension of a stainless steel strip to be 700Kg, the tension of a copper coil to be 2000Kg, the tension after compounding to be 1500Kg, the speed of the compounding mill to be 6 m/min, controlling the thickness after compounding to be 1.2mm and controlling the rolling deformation rate to be 61%;
3. the stainless steel copper composite coil which is well compounded is subjected to diffusion annealing between two metals, so that the bonding fastness is enhanced, and the effect of no layering is achieved. Continuous annealing is adopted, the protective gas in the furnace is mixed gas (namely 75% hydrogen and 25% nitrogen) decomposed by ammonia gas, the brightness of the metal surface is protected from being oxidized, the surface oxide film is subjected to high hydrogen reduction, the gas flow is controlled to be 10m 3/h, the heating mode adopts natural gas heating, the diffusion annealing temperature is 1000 ℃, the linear speed of a strip is 1.2m/min, molecules between stainless steel and copper are diffused, and an alloy layer is formed on a joint surface; the mechanical tensile strength reaches 450MPa, the elongation is more than 15%, and the surface hardness of 316L stainless steel is HV 220;
4. flattening the stainless steel copper composite coil subjected to diffusion annealing by using a flattening machine, eliminating the impression of a material yield platform, wherein the flattening amount is less than 3%, the flattening force is 200-300 tons, and the speed is 35 m/min;
5. carrying out stretch bending and straightening treatment on the leveled stainless steel-copper composite material at the speed of 20-50 m/min and the elongation rate of within 3%;
6. and (3) sizing and slitting the composite coil subjected to stretch bending and straightening according to the requirements of customers, wherein the minimum slitting width is 20mm, the width tolerance is +/-0.10, and the slitting speed is 20 m/min.
The second embodiment: production method of stainless steel and copper composite coiled material
The method comprises the following steps: the composition proportion is calculated according to the weight ratio:
the substrate is a T2 copper roll, the width of the substrate is 500mm, and the thickness of the substrate is 2.0 mm; the composite upper layer adopts a 316L stainless steel coil, the width of the stainless steel coil is 500mm, and the thickness of the stainless steel coil is 0.5 mm; the weight of a single stainless steel roll is 800Kg, and the weight of a middle layer copper roll is 3600 Kg;
1. respectively placing a stainless steel coil and a copper coil on upper and middle different uncoilers, simultaneously carrying out surface polishing treatment on two layers of metal, wherein the rotating speed of a polisher is 1200 revolutions per minute, completely polishing a composite surface and the polishing depth is proper, the polishing depth of the stainless steel is 0.03mm, and the polishing depth of the copper strip is 0.05 mm;
2. feeding the two polished metals into a compounding mill, setting the tension of a stainless steel strip to be 1000Kg, the tension of a copper coil to be 3000Kg, setting the tension after compounding to be 2500Kg, setting the speed of the compounding mill to be 6 m/min, controlling the thickness after compounding to be 1.1mm, and controlling the rolling deformation rate to be 56%;
3. the stainless steel copper composite coil which is well compounded is subjected to diffusion annealing between two metals, so that the bonding fastness is enhanced, and the effect of no layering is achieved. Continuous annealing is adopted, the protective gas in the furnace is mixed gas (namely 75% hydrogen and 25% nitrogen) decomposed by ammonia, the brightness of the metal surface is protected from being oxidized, the surface oxide film is subjected to high hydrogen reduction, the gas flow is controlled to be 10m 3/h, the heating mode adopts natural gas heating, the diffusion annealing temperature is 1030 ℃, the linear speed of a strip is 1.0m/min, molecules between stainless steel and copper are diffused, and an alloy layer is formed on a joint surface; the mechanical tensile strength reaches 420MPa, the elongation is more than 18%, and the surface hardness of 316L stainless steel is HV 207;
4. flattening the stainless steel copper composite coil subjected to diffusion annealing by using a flattening machine, eliminating the impression of a material yield platform, wherein the flattening amount is less than 3%, the flattening force is 200-300 tons, and the speed is 30 m/min;
5. carrying out stretch bending and straightening treatment on the leveled stainless steel-copper composite material at the speed of 20-50 m/min and the elongation rate of within 3%;
6. and (3) sizing and slitting the composite coil subjected to stretch bending and straightening according to the requirements of customers, wherein the minimum slitting width is 20mm, the width tolerance is +/-0.10, and the slitting speed is 20 m/min.
The third embodiment is as follows: production method of stainless steel and copper composite coiled material
The method comprises the following steps: the composition proportion is calculated according to the weight ratio:
the substrate is a T2 copper roll, the width of the substrate is 400 mm, and the thickness of the substrate is 1.5 mm; the composite upper and lower layers are made of 316L stainless steel coils, the width of the coils is 395mm, and the thickness of the coils is 0.35 mm; the weight of a single stainless steel roll is 600Kg, and the weight of a middle layer copper roll is 3000 Kg;
1. respectively placing a stainless steel coil and a copper coil on an upper uncoiler, a middle uncoiler and a lower uncoiler, simultaneously carrying out surface polishing treatment on three layers of metal, wherein the rotating speed of a polisher is 1800 rpm, the composite surface is completely polished and the polishing depth is proper, the polishing depth of the stainless steel is 0.02mm, and the polishing depth of the copper strip is 0.06 mm;
2. feeding the two polished metals into a compounding mill, setting the tension of a stainless steel belt at 600Kg, the tension of a copper coil at 1800Kg, the tension after compounding at 1200Kg, the speed of the compounding mill at 5m/min, controlling the thickness after compounding at 0.8mm and controlling the rolling deformation rate at 64%;
3. the stainless steel copper composite coil which is well compounded is subjected to diffusion annealing between two metals, so that the bonding fastness is enhanced, and the effect of no layering is achieved. Continuous annealing is adopted, the protective gas in the furnace is mixed gas (namely 75% hydrogen and 25% nitrogen) decomposed by ammonia gas, the brightness of the metal surface is protected from being oxidized, the surface oxide film is subjected to high hydrogen reduction, the gas flow is controlled to be 10m 3/h, the heating mode adopts natural gas heating, the diffusion annealing temperature is 1010 ℃, the linear speed of a strip is 0.8m/min, molecules between stainless steel and copper are diffused, and an alloy layer is formed on a joint surface; the mechanical tensile strength reaches 430MPa, the elongation is more than 15%, and the surface hardness of 316L stainless steel is HV 210;
4. flattening the stainless steel copper composite coil subjected to diffusion annealing by using a flattening machine, eliminating the impression of a material yield platform, wherein the flattening amount is less than 3%, the flattening force is 200-300 tons, and the speed is 30 m/min;
5. carrying out stretch bending and straightening treatment on the leveled stainless steel-copper composite material at the speed of 20-50 m/min and the elongation rate of within 3%;
6. and (3) sizing and slitting the composite coil subjected to stretch bending and straightening according to the requirements of customers, wherein the minimum slitting width is 20mm, the width tolerance is +/-0.10, and the slitting speed is 20 m/min.
The fourth embodiment is as follows: production method of stainless steel and copper composite coiled material
The method comprises the following steps: the composition proportion is calculated according to the weight ratio:
the substrate is a T2 copper roll, the width of the substrate is 600mm, and the thickness of the substrate is 2.0 mm; the composite upper and lower layers are made of 316L stainless steel coils, the width of the stainless steel coils is 600mm, and the thickness of the stainless steel coils is 0.2 mm; the weight of a single stainless steel roll is 800Kg, and the weight of a middle layer copper roll is 9000 Kg;
1. respectively placing a stainless steel coil and a copper coil on an upper uncoiler, a middle uncoiler and a lower uncoiler, simultaneously carrying out surface polishing treatment on three layers of metal, wherein the rotating speed of a polisher is 1000 r/min, the composite surface is completely polished and the polishing depth is proper, the polishing depth of the stainless steel is 0.05mm, and the polishing depth of the copper strip is 0.08 mm;
2. feeding the two polished metals into a compounding mill, setting the tension of a stainless steel strip to be 650Kg, the tension of a copper coil to be 2800Kg, setting the tension after compounding to be 1500Kg, setting the speed of the compounding mill to be 4 m/min, controlling the thickness after compounding to be 1.2mm, and controlling the rolling deformation rate to be 50%;
3. the stainless steel copper composite coil which is well compounded is subjected to diffusion annealing between two metals, so that the bonding fastness is enhanced, and the effect of no layering is achieved. Continuous annealing is adopted, the protective gas in the furnace is mixed gas (namely 75% hydrogen and 25% nitrogen) decomposed by ammonia gas, the brightness of the metal surface is protected from being oxidized, the surface oxide film is subjected to high hydrogen reduction, the gas flow is controlled to be 10m 3/h, the heating mode adopts natural gas heating, the diffusion annealing temperature is 1000 ℃, the linear speed of a strip is 1.5m/min, molecules between stainless steel and copper are diffused, and an alloy layer is formed on a joint surface; the mechanical tensile strength reaches 470MPa, the elongation is more than 12 percent, and the surface hardness of 316L stainless steel is HV 260;
4. flattening the stainless steel copper composite coil subjected to diffusion annealing by using a flattening machine, eliminating the impression of a material yield platform, wherein the flattening amount is less than 3%, the flattening force is 200-300 tons, and the speed is 30 m/min;
5. carrying out stretch bending and straightening treatment on the leveled stainless steel-copper composite material at the speed of 20-50 m/min and the elongation rate of within 3%;
6. and (3) sizing and slitting the composite coil subjected to stretch bending and straightening according to the requirements of customers, wherein the minimum slitting width is 20mm, the width tolerance is +/-0.10, and the slitting speed is 20 m/min.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (2)
1. A production method of a stainless steel and copper composite coiled material, which is characterized in that,
the method comprises the following specific steps:
(1) and performing raw material texturing surface treatment: the raw materials comprise a stainless steel coil and a copper coil,
wherein the surface treatment of the stainless steel coil is as follows: adopting an automatic strip grinding unit to grind the composite surface of the stainless steel coil by using an abrasive belt;
the surface treatment of the copper coil is as follows: adopting an automatic strip rolling and polishing unit, and polishing the front and back surfaces of the copper roll by using an abrasive belt;
(2) and composite rolling production:
the substrate adopts a cold-rolled copper coil, and the composite plate is a cold-rolled stainless steel coil; synchronously rolling the two metal materials in a composite mode, wherein the stainless steel and the copper are not subjected to any heat treatment in the rolling process, the rolling deformation rate is more than 40%, and double-layer or three-layer compounding is performed according to requirements;
(3) and diffusion annealing: the rolled composite coil is subjected to recovery and recrystallization of a cold deformation layer and diffusion annealing of an alloy layer, a continuous annealing furnace is adopted in the annealing mode, and ammonia decomposition gas is used in the furnace atmosphere;
(4) and leveling treatment: leveling the composite material subjected to diffusion annealing under a leveling machine;
(5) and stretch bending and straightening: carrying out stretch bending and straightening treatment on the flattened stainless steel-copper composite material;
(6) and carrying out fixed-length slitting on the composite coil subjected to stretch bending and straightening.
2. The method for producing a stainless steel and copper composite coil according to claim 1, wherein:
in the step (1), when the stainless steel coil is polished, a 316L stainless steel coil is adopted as the copper coil, an abrasive belt made of silicon carbide is used, the abrasive belt is 120-mesh in granularity, and the polishing depth is 0.02-0.05 mm;
selecting a T2 copper roll as the copper roll, using an abrasive belt made of silicon carbide, selecting a 40-mesh particle size as the abrasive belt, and polishing the depth to be 0.05-0.08 mm;
in the step (2), the width of the copper coil is 300-600 mm, and the thickness of the copper coil is 1.5-5 mm; the composite plate is a 316L cold-rolled stainless steel coil, the width of the composite plate is 300-600 mm, and the thickness of the composite plate is 0.2-0.5 mm;
in the step (3), in order to ensure the diffusion annealing of the copper and the stainless steel, the 316L stainless steel is generally heated to about 1000 ℃ and ~ 1030 ℃ and rapidly cooled, the strength is 380-500MPa, and the elongation is more than 25 percent;
in the step (4), the leveling pressure is 180-200 tons, and the leveling speed is 30-60 m/min;
in the step (5), the speed is 20-50 m/min, and the elongation is controlled within 3%;
in the step (6), the minimum strip width is 20mm, and the width tolerance is +/-0.10.
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| CN112895623A (en) * | 2021-02-04 | 2021-06-04 | 安徽鑫稻新能源科技有限公司 | Functional material for heat dissipation of mobile phone chip and processing technology thereof |
| CN115026139A (en) * | 2022-08-10 | 2022-09-09 | 太原科技大学 | Method for preparing nickel-magnesium composite board by rolling |
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