use. In 2008, my country's copper production was 3,779.3 thousand tons, but the consumption was 5,133.6 thousand tons, with a shortfall of 1,354.3 thousand tons[1], resulting in a high copper price. The scarcity has aggravated the rise of copper prices, so seeking its substitutes has become an inevitable trend of development. The content of aluminum in the earth's crust is as high as 8%, the price is relatively cheap, and the electrical conductivity and thermal conductivity are good, but the direct replacement of copper with aluminum cannot meet the performance requirements in some occasions. The copper clad aluminum material not only has the advantages of copper's good electrical conductivity, high thermal conductivity and beautiful appearance, but also has the advantages of aluminum's light weight and low price, which meets people's requirements for its performance and economy.
To identify the copper clad aluminum, have to know the thee coper clad aluminum production methods:
The basic principle of the rolling composite method is that under the strong pressure of the rolling mill, the metal plate to be composited breaks the oxide scale on the surface of the component layer, and plastic deformation occurs in the entire metal interface, and the atoms in the component layers of the fresh metal surface exposed after crushing move with each other, and finally form a metallurgical bond. When rolling and cladding, the oxide layer on the surface must be ruptured to expose the fresh interface, so a sufficient pressure should be applied to the clad metal, followed by subsequent heat treatment, the function is to remove the residual stress generated, improve the clad strength, and achieve complete cladding. Effect. According to the different temperature parameters, it can be divided into hot-rolled cladding and cold-rolled cladding.
The explosive compound method is to use the huge energy generated at the moment of the explosive explosion as an energy source to plastically deform, melt and reach atoms in the metal.
A connection technique for inter-bonding. It is not only an important metal part connection method, but also a basic composite technology. In engineering applications, the most common methods are the parallel method and the angle method for explosive welding.
The casting-rolling composite method is an organic combination of solid-state metal hot-dip plating technology and liquid metal, casting and rolling technology.
The base metal makes the liquid metal in the semi-solidified state and the solid base metal enter the rolling mill at the same time to realize recombination. This process is a liquid-solid phase composite method, which has the advantages of simple process, high composite strength, low energy consumption and high production efficiency, and is suitable for continuous production.
As a new type of composite material, copper clad aluminum plate has excellent performance and has been used in the fields of machinery, electricity, daily necessities and electrical appliances.
It is widely used in the field, so its research is of great significance. At present, the production methods of copper clad aluminum plates cannot completely replace each other due to their different characteristics, but can only develop and complement each other. , in order to achieve better performance.
