Preparation method of magnesium/aluminum-based laminated composite plate

Abstract

The invention relates to a preparation method of metal composite plates, in particular to a preparation method of a magnesium/aluminum-based laminated composite plate in order to solve the problems that an existing preparation method of the magnesium/aluminum-based laminated composite plate has the disadvantages that the required preparation conditions are strict, the composite effect is poor, andthe requirements for equipment are high in the prior art. The preparation method comprises the steps of 1, conducting grinding, ultrasonic cleaning and air-drying; 2, sputtering copper coatings on the surfaces of a magnesium-aluminum alloy plat under an argon environment and the conditions of arc-added glow discharge and external water circulating cooling; 3, selecting a graphite die to conduct hot-pressing sintering on the magnesium/aluminum-based laminated composite plate in a plasma discharge sintering furnace under the conditions of current heating, pressurization and external water circulating cooling; and 4, conducting grinding and sanding treatment. The preparation method has the advantages that interface bonding of the magnesium/aluminum-based laminated composite plate is good, and the magnesium/aluminum-based laminated composite plate has no defects such as cracks and pores; a 3-micron element diffusion layer exists at the magnesium/copper interface, a 7-micron element diffusion layer exists at the copper/aluminum interface, and generation of brittle phases is restrained through the copper coatings sputtered at the interfaces; the interface bonding strength of the magnesium/aluminum-based laminated composite plate can reach 80 MPa.

Description

technical field [0001] The invention relates to a method for preparing a metal composite board, in particular to a method for preparing a magnesium / aluminum base layer composite board. Background technique [0002] Non-ferrous metal magnesium alloy has the advantages of low density, high specific strength / specific stiffness, large elastic modulus, good shock absorption, and recyclability. It is the lightest metal material found so far and has been widely used in aerospace. , transportation, medical equipment and automobile manufacturing and other industrial fields. However, magnesium alloys have the disadvantages of poor corrosion resistance and low plasticity, which limit the development of magnesium alloys to a certain extent. In order to improve the corrosion resistance and plasticity of magnesium alloys, a layer of metal materials with good corrosion resistance and high plasticity is often coated on the surface of magnesium alloys, such as coating a layer of aluminum al...

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Problems solved by technology

[0004] The present invention solves the problems of harsh preparation conditions, poor composite effect and high requirements on equipment in the existing preparation method of magnesium alloy base-laye

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