Aluminum-copper composite plate adopting aluminum alloy and preparation method of aluminum-copper composite plate

Abstract

The invention provides an aluminum-copper composite plate adopting aluminum alloy and a preparation method of the aluminum-copper composite plate. The preparation method comprises the steps that oil stains on the surface are removed; homogenizing annealing treatment and water quenching treatment are carried out; surface oxide skin and other impurities are removed, a foamed aluminum plate is subjected to electrochemical polishing treatment, and the surface roughness of the aluminum alloy plate and the copper plate is ground to 50 micrometers or below; the copper plate, the foamed aluminum plate and the aluminum alloy plate are sequentially aligned, stacked, clamped and fixed from bottom to top; cold rolling composite treatment is carried out; annealing heat treatment is carried out under the protection of inert atmosphere, molten pure aluminum liquid is slowly injected into the foamed aluminum plate layer, and rapid cooling is carried out after annealing heat treatment is finished; cold finish rolling treatment is carried out; and heat treatment is carried out under the protection of mixed gas of inert gas and hydrogen. In the aluminum alloy plate, the content of Si is 0.5%-1.2%, the content of Cu is 3.9%-4.8%, the content of Mg is 0.4%-0.8%, the content of Mn is 0.4%-1.0%, and the content of Zn is 0.25%. The interface bonding strength of the aluminum-copper composite plate finished product can be effectively improved, and the cracking occurrence rate of the bonding surface of the copper plate and the aluminum alloy plate is lower than that of an existing aluminum-copper composite plate.

Description

technical field [0001] The invention relates to the technical field of metal composite plates, in particular to an aluminum-copper composite plate using aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum-copper composite board is a new metal composite board. Due to its advantages of easy forming and corrosion resistance of traditional aluminum board and high strength of copper board, it is widely used in petroleum, chemical industry, shipbuilding, electronics, electric power, metallurgy, machinery, etc. , aerospace and atomic energy and other industrial fields have good application prospects. [0003] In the prior art, the aluminum-copper clad plate is usually made by processing the copper plate and the aluminum plate through cold rolling, hot rolling, explosive cladding and explosive rolling. Among them, cold-rolling composite has the advantages of simple operation, easy automation, precise size and high processing efficiency, and has b...

AI Technical Summary

Problems solved by technology

However, the copper-aluminum composite plate obtained by cold-rolling composite has low bonding strength at the copper-aluminum joint, and cracks are prone to occur on the joint surface during use.