Aluminum alloy surface B4C particle reinforced Al base composite cladding layer and preparation method

Abstract

The invention discloses an aluminum alloy surface B4C particle reinforced Al base composite cladding layer and a preparation method, overcomes the problem that a traditional technology is difficult to remove compact oxide films quickly grown on surfaces of aluminum and an alloy of the aluminum, solves the problems of difficult powder feeding due to light mass of B4C particles and weak wettability with aluminum alloy molten liquid, and effectively leads the B4C particles in the aluminum alloy surface layer to form an Al base composite cladding layer with excellent metallurgic bonding. In cooperation with the powder-wire composite cladding technical scheme, by using consumable electrode inert gas protective welding-MIG welding, aluminum alloy welding wires are transited to the aluminum alloy wire, the side injection of the B4C particles is assisted to fuse in the Al base cladding layer, that is, the B4C particle reinforced Al base composite cladding layer is prepared on the aluminum alloy surface. The B4C particle reinforced Al base composite cladding layer and an aluminum alloy substrate are excellently bonded, and the B4C particles in the cladding layer and an Al matrix are excellently bonded, and obvious defects such as air holes and cracks are avoided; and the aluminum alloy surface B4C particle reinforced Al base composite cladding layer is higher in wear resistance compared with 45 steel.

Description

technical field [0001] The present invention relates to material surface science and ceramic reinforced Al-based composite coating and its preparation method, more precisely, the present invention relates to aluminum alloy surface B 4 C particle reinforced Al-based composite cladding layer and its preparation method. Background technique [0002] Aluminum alloy is light in weight, high in specific strength, resistant to atmospheric corrosion, non-brittle at low temperature, non-magnetic, and easy to process and form. It is widely used in aerospace, automotive machinery, electronics industry, and national defense and military industries. Poor performance limits its scope of application in fields such as drilling and mining (such as aluminum alloy drill pipe), high-speed trains, and lightweight armor. In order to solve the short board of aluminum-based materials, aluminum-matrix composites, especially ceramic-reinforced aluminum-matrix composites, have been extensively studie...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to overcome the difficulty of breaking the dense oxide film on the surface of aluminum and its alloys by traditional techniques, and to solve the problem of B 4 C particles are light in weight, difficult to feed powder and have poor wettability with aluminum alloy melt, and B 4 The problem of effectively introducing C particles into the surface layer of aluminum alloy and forming an Al-based composite cladding layer with good metallurgical bonding

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