Forming method for high-interface-bonding-strength copper/aluminum composite material

Abstract

The invention discloses a forming method for a high-interface-bonding-strength copper / aluminum composite material, and belongs to the technical field of metal laminar composite material preparing. According to the forming method, to-be-combined surfaces of a copper plate and an aluminum plate are machined, macroscopic rugged to-be-combined surfaces are obtained, a louvre blade is adopted for conducting grinding treatment on the to-be-combined surfaces, the direction of stripes formed through grinding is perpendicular to the rolling direction, then, the copper plate and the aluminum plate are overlapped up and down or arranged left and right side by side to be in butt joint, and a copper / aluminum assembly is obtained; then, single-pass low-rolling-reduction cold rolling pre-composition is conducted, high-temperature short-time heating is conducted, finally, single-pass hot rolling final composition is conducted, and the high-interface-bonding-strength copper / aluminum composite materialis obtained. The forming method has the advantages that the capability requirement for a rolling machine needed for producing the copper / aluminum composite material is low, the technology is simple, the production cost is low, a macroscopic composite interface of a non-flat artificial structure and a microcosmic composite interface of a particle pinning structure can be obtained, the interface bonding strength is larger than or equal to 90 MPa, the applicable copper / aluminum composite material range is wide, and industrial popularization is easy.

Description

technical field [0001] The invention belongs to the technical field of metal layered composite material preparation, and in particular provides a forming method of copper / aluminum composite material with high interfacial bonding strength. Background technique [0002] With the rapid development of science and technology and economic society, the national economy and national defense and military fields have higher and higher requirements for material performance, and the requirements for material structure improvement are also becoming stronger and stronger. A single metal material can no longer meet the requirements of practical applications. Higher performance requirements are constantly being put forward. Therefore, metal layered composite materials with the physical, chemical and mechanical properties and price advantages of different metal materials came into being. Copper / aluminum composite materials are composed of copper and aluminum materials laminated up and down ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of low interfacial bonding strength of the copper / aluminum composite material prepared by the existing method, and proposes to process the surface to be compounded of the copper plate and the aluminum plate to obtain a macroscopic rough and uneven surface to be compounded, and to use louvers to control the surface After cleaning and degreasing, the surface to be compounded is polished, so that the direction of the stripes formed by grinding is perpendicular to the rolling direction, and then the copper plate and the aluminum plate are stacked up and down or side by side, and the billets are assembled side by side, and then the copper / aluminum billets are assembled at room temperature. Single-pass cold-rolled pre-composite under low pressure to obtain copper / aluminum cold-rolled pre-composite material, and then heat the copper / aluminum cold-rolled pre-composite material at high temperature for a short time to make it reach the temperature required for subsequent hot-rolled final compounding, and at the same time During the heating process, the atoms at the composite interface of the copper / aluminum cold-rolled pre-composite material are interdiffused and form an appropriate amount of intermetallic compound layer, and then the single-pass hot-rolled final composite is rapidly carried out. Through reasonable matching of process parameters, low cost Preparation of high-performance copper / aluminum composites with high interfacial bonding strength

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