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With the rapid development of science and technology and industrialization, more and more high performance requirements of materials, structural improvement requirements of the material is also growing strongly, and a single metal has been unable to meet these needs. Composite material while maintaining the characteristics of the parent material \Therefore, the subject combination of materials application demands, copper and aluminum composite panel extrusion process, performance studies. In nature, the conductive properties of copper after silver, copper resources has become tighter, the price is high, therefore, to find a substitute of copper is the development trend. Aluminum rich resources, lightweight, lower prices, conductivity than copper. Copper and aluminum composite panels both copper conductivity, high thermal conductivity, etc., but also has aluminum lightweight, cheap, etc., are widely used in fields such as electrical, mechanical, chemical, life appliances. At present, the processing of copper and aluminum composite panels rolling composite method, explosive compound method. Rolling composite process is simple, high production efficiency, but it is easy to generate a hard and brittle intermetallic compounds, reduce the composite strength. The explosive compound method is low cost, flexibility, but the poor environmental conditions, the low level of mechanical with a certain risk. This article proposed the copper-aluminum composite plate extrusion forming process, the process is: first by hot extrusion Lvbang extruded into a sheet, the copper strip has been introduced into the mold of the aluminum plate was driven together with the extruded from the die, while in the extrusion process occurred atomic diffusion reached atom bonded. The extrusion tests combined with forming process Deform-3D software for blocking materials, Copperbelt fracture experiment using copper and aluminum composite panel extrusion process numerical simulation, and the simulation results of the extrusion process, the mold structure optimization: Copper coated with lubricant in order to reduce the friction of the mold, reducing the composite modulus with length and increase the width of the cavity, and increase the bending mold at the fillet radius. The test results show that the optimized extrusion process and die hot extrusion of copper and aluminum composite panels, smooth appearance of products, the measured conductivity of 92% IACS; copper and aluminum composite panel interface, scanning electron microscopy (SEM), found copper and aluminum diffusion is obvious that the two metals to achieve a good metallurgical bond, high bond strength. In this paper, the hot extrusion process process is simple, low cost, squeeze pressure, low equipment requirements, products combined strength.
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