Abstract
In this research, GTAW process was applied to create a surface layer of Al/WCp on 6061Al substrate. Micro tungsten carbide powder combined with PVA paste was applied on the substrate and welding process was carried out. It was shown that process variables such as welding speed, protective gas flow rate, welding current and also changing the amount of hard micro WC particles could influence the composite layer hardness and wear resistance. The results confirmed that, this process was an efficient method to modify the surface properties of the 6061Al alloy. It was observed that by choosing desirable process variables, one could get a hard surface layer with higher wear resistance than the substrate.
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