Copper aluminum roll bonded clad plate supplier manufacturer in China

Jun 11, 2023

Copper is a scarce metal and belongs to strategic resources. China needs to import a large number of copper materials every year. In order to solve the contradiction between the increasingly scarce copper resources and the increasing demand, copper-aluminium roll bonded clad plates have attracted much attention in recent years because of its high conductivity, high thermal conductivity, low contact resistance, light weight and corrosion resistance.



The Copper aluminum roll bonded clad plate developed by is an effective process for producing copper-aluminium roll bonded sheets. It can overcome the large difference of properties between copper and aluminium and achieve solid metallurgical bonding at the interface.


Before rolling, the surface of aluminium and copper should be cleaned up and roughened. The common method is rotating steel brush method, which produces a brittle coating on the metal surface through the work hardening of the steel brush. In addition, a certain roughness of the joint surface is also obtained.



During rolling, copper and aluminium are extruded and embedded into each other, physicochemical action occurs, and preliminary composite is achieved. With rolling, the embedded metal begins to expand and extend, forming a large area of embedded, achieving the desired composite effect.



In the subsequent diffusion annealing process, under the action of high temperature, the metal atoms on the interface get enough energy to diffuse with each other, eliminate the defects, eliminate the internal residual stress, and form a certain depth of diffusion layer on both sides, so as to achieve the desired composite effect.