Using a 5 kW CO2 laser, a Ni-Cr-Al plasma coating on Al-Si alloy surface was remelted as a cladding layer. The microstructural analysis showed that there are some amorphous structures in the clad zone that co-exist with crystalline Ni3Al. A semi-quantitative method using DTA was used to determine the content of amorphous structure in the zone. Wear tests of laser clad samples using different amorphous contents paired with grey cast iron were carried out under oil lubricated condition. Experimental results show that the wear amount of laser clad samples was quite small. The higher the content of amorphous structure, the smaller the wear amount. All friction coefficients of the clad samples versus grey iron pairs tended to stability and they were less than 0.1 after the sliding distance exceeded 2 km.