阅读说明：本技术 一种不锈钢和铜复合卷材的生产方法 (Production method of stainless steel and copper composite coiled material ) 是由 罗柳根 刘岗 高欢 于 2019-09-24 设计创作，主要内容包括：本发明涉及一种不锈钢和铜复合卷材的生产方法,属于不锈钢带复合铜带材料技术领域。其主要包含以下步骤：原材料毛化表面处理、冷复合轧制、复合后扩散退火、精轧后再进行平整、分条、包装后为成品。本发明制造工艺简单,原料材来源广泛,制造成本低,能有效地改善单金属材料散热问题,替代铜和铜合金材料在电子电器、汽车散热器、油冷器、水箱等场合。(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.)

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.

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.