1. Product description
In nature, copper is second only to silver in conductivity and thermal conductivity, so it has been widely used in electric power, machinery and other fields. In 2008, China's copper output was 3779.3 thousand tons, but its consumption was 5133.6 thousand tons, with a gap of 1354.3 thousand tons [1. The content of aluminum in the crust is as high as 8%, which is relatively cheap and has good conductivity and thermal conductivity. However, the direct replacement of copper with aluminum can not meet the performance requirements in some occasions. Bimetal copper clad aluminium plate not only have the advantages of good copper conductivity, high thermal conductivity and beautiful appearance, but also have the advantages of light weight and low price of aluminum, meeting people's requirements for its performance and economy.
2. Product Features
Annealing of deformed metals can effectively improve the properties of materials. According to the copper aluminum phase diagram, eutectic reaction will occur at 548 ℃, so the annealing temperature is 300 ℃ lower than the eutectic reaction. The photos show the joint surface morphology of composite plates with different thicknesses and after heat treatment. The bright area is copper with large atomic number, and the dark area is aluminum with small atomic number. After rolling, some defects such as holes and bond separation appeared on the joint surface of the plate due to the different deformation rates of copper and aluminum during rolling. The existence of these defects will greatly reduce the bonding strength and conductivity of the composite plate. There are metal particles stacked at the junction, because the huge deformation amount promotes the plastic deformation of each component and the rubbing between interface metals. The heat generated in the deformation process and the sharp deformation of the metal in the interface junction area cause the interface atoms to diffuse and form intermetallic compounds, which become hard particles and accumulate during rolling.
3. Application
As a new type of composite material, Bimetal copper clad aluminium plate is widely used in various fields such as electronics, electrical appliances, electric power, metallurgical equipment, machinery, automobile, energy and daily necessities. The following describes the application of several Bimetal copper clad aluminium sheet. Copper aluminum radiator for hot water heating has the advantages of good thermal conductivity, high pressure bearing capacity, strong corrosion resistance, etc. It is an ideal new residential radiator developed at present. Dispersion with other materials.
4. FAQ
Metal composite is a composite made of two or more metal materials through a certain processing technology. The principle for selecting the members of the metal composite material group is to select according to the specific use, such as heat conduction, conductivity, wear resistance, corrosion resistance, etc., and make full use of the advantages of each component to achieve the goal that composite materials have the advantages of each component material. As long as the selection of materials is reasonable, the composite can achieve the effect of reasonable structure and low price. Because the use of composite materials can save a lot of resources and greatly reduce investment, composite materials are gradually favored by the market, and the annual output in foreign countries is more than several hundred thousand tons.
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