A kind of manufacturing method of copper/iron bimetallic composite strip and plate

Abstract

The invention belongs to the field of metal processing, and particularly relates to a copper / iron bi-metal composite strip and plate manufacturing method. According to the method, iron alloy raw materials are processed to be in the shape of a round bucket, copper alloy raw materials and carbon materials are mixed and then placed into the iron bucket, the iron bucket is placed in a heating furnace to be heated, melt is formed in the iron bucket, the iron buckle in which the melt is contained is placed in a centrifugal machine so that a bi-metal composite bucket can be obtained, the bi-metal composite bucket is cut off in the direction of the symmetry axis so that two semicircular buckets can be obtained, the two semicircular buckets are repeatedly rolled with a rolling mill, and a copper / iron bi-metal composite strip or plate is obtained. According to the method, combination between an iron alloy plate and a copper alloy plate which are large in performance difference is achieved mainly through mutual attraction force between atoms of the Fe element and the Cu element which are not mutually soluble, and the metallurgical-combination copper / iron bi-metal composite sheet strip which is inseparable because of the firmly-combined contact faces is obtained.

Description

technical field [0001] The invention belongs to the field of metal processing, in particular to a method for manufacturing copper / iron bimetallic composite strips and plates. Background technique [0002] The existing technologies of bimetal cladding mainly include solid-phase cladding technologies such as rolling cladding, diffusion cladding and explosive cladding, and welding cladding technologies such as electron beam welding with defects such as porosity and microcracks in the fusion zone. In the composite technology of copper / iron bimetal, due to the large difference between copper alloy and iron alloy in physical properties such as thermal expansion and melting point, as well as chemical properties such as corrosion resistance, the key step is to combine copper and iron metal during later rolling or explosion. In the contact stage, there are problems of unstable yield or difficult process. For example, for the three-step solid phase rolling composite technology, which...

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Problems solved by technology

In the composite technology of copper / iron bimetal, due to the large difference between the physical properties such as thermal expansion and melting point and the chemical properties such as corrosion resistance of copper alloy and iron alloy, the key step is to combine copper and iron metal during later rolling or explosion. In the contact stage, there are problems of unstable yield or difficult process

For example, for the three-step solid-phase rolling composite technology, specifically including composite surface pretreatment such as degreasing and brushing, rolling composite and diffusion annealing, the surface-treated clean metal surface will quickly form a regenerated oxide film after staying in the air for a short time Or adsorption film, especially defects such as multiple inclusions and hard and brittle compounds at the bimetallic joint, affect the bonding strength between the bimetallic interface and the mechanical properties of the material; it often requires a large deformation of more than 50% during rolling and compounding In order to achieve the initial bonding of the interface, a large deformation compound not only puts forward higher requirements for the strength, stiffness and motor capacity of the compound rolling mill, but also for the physical and mechanical properties of iron alloys and copper alloys, especially for metals with widely different melting points, resulting in poor yields. Stable, at the same time, the use of large deformation rolling and compounding will cause severe work hardening of the metal, which will affect the reprocessing performance of the composite plate

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