Preparation method for copper-steel composite

Abstract

The invention relates to a bimetal composite, in particular to a composition method for copper or copper alloys on the surface of steel. Steel and copper can be both compounded with zinc or zinc alloys with a low melting point effectively, a layer of zinc is plated on the surface of each of a copper plate and a steel plate by a hot-dip method, the zinc is heated to a temperature higher than the melting point of zinc under protection of gases, the copper plate and the steel plate are pressed together under pressure, liquid thin zinc layers on the surfaces of the plates are compounded and diffused mutually by thermal insulation, and accordingly composition of steel and copper is achieved.

Description

technical field [0001] The invention relates to bimetal composite materials, in particular to a method for compounding copper or copper alloy on the surface of steel. technical background [0002] Copper and copper alloys have excellent electrical conductivity, thermal conductivity and wear resistance, and are widely used in industries such as electric power, electrical appliances, electronics, heat transfer, information, automobiles, and home appliances; in the world's resource reserves, copper resources are relatively scarce, so , Replacing copper with other metals is a great strategy to save copper resources; in order to maximize the performance of metal materials, one of the methods is to combine materials with different properties to make composite materials; copper-steel Composite materials are copper or copper alloys on the surface of steel to form bimetallic composite materials. Because this composite material has the advantages of anti-corrosion, anti-wear, excellen...

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Problems solved by technology

[0004] The basic process of the reverse solidification method is: make a thin master tape of a certain thickness pass through a molten metal pool with a certain height and superheating degree vertically at a certain speed. When the cold master tape is introduced into the molten metal pool, the temperature of its surface The temperature of the dry metal liquid is much lower, so the metal melt solidifies and grows on the parent strip; since the solidified layer metal liquid can be different from the parent strip, this process is also suitable for the production of composite materials; the liquid-solid phase rolling method is the Northeastern University A composite new technology started to be developed in the late 1980s. At present, the construction of the stainless steel / aluminum composite strip pilot production line and the laboratory research work on the steel / copper composite strip have been completed; the liquid metal (copper or copper Alloys) are continuously cast on the steel strip and enter the rolling mill at the same time as the solid steel strip to undergo deformation, and realize the metallurgical bonding of the interface under pressure; the liquid-solid phase rolling composite technology is based on the rapid non-equilibrium solidification of liquid metal Solidification is characterized by direct plastic forming, which can effectively control the direction and limit of complex interfacial reactions of dissimilar metals, such as diffusion, dissolution, formation and growth of new phases, and thus ensure a good combination of composite interfaces; however, the above two new Due to the problem of high temperature oxidation of steel, the composite method is still in the research and development stage; the casting method is easy to cause interface corrosion, it is difficult to uniformly combine when manufacturing large plate-shaped parts, and the structure is coarse and uneven

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