LASER ALLOYING OF ENAC-ALMG3 ALUMINIUM ALLOYS WITH VANADIUM CARBIDE

摘要

The purpose of this paper was to investigate the influence of a high power diode laser surface treatment on the structure and properties of aluminium alloy. The aim of this investigation was to improve the mechanical and tribological properties of the aluminium alloy surface by simultaneously melting and feeding vanadium carbide particles into the molten pool. During the process was used fiber laser (FL). As a base material the ENAC - AlMg3 aluminium alloy has been used. To improve the surface mechanical and wear properties of the applied aluminium alloy was used sintered particles of vanadium carbide VC. Initially, the grain size of the powder was approximately about 0,5-10μm. As a result of sintering and the next milling was obtained particle size in t the range of 50-100μm. The ceramic powder was introduced in the remelting surface by a vacuum feeder at a constant rate of 5 g/m. In order to remelted of the aluminium alloy surface, the FL laser of 3kW laser beam power has been used. In order to protect the liquid metal alloy during laser treatment was used argon. The linear laser scan rate of the beam was set 0.8 cm/s.