Microstructure and high temperature abrasion resistance of Ni-based WC composite layer deposited by plasma arc

The Ni-based alloy powder with 60% WC was deposited on the surface of 15CrMo by plasma arc surfacing.The microstructures, hardness and wear resistance of the layer were analyzed.The results show that the layer has good external appearance and the WC particles which maintain its high hardness and exhibit few refusion distributes uniformly across the section of the layer.The layer also has high hardness and wear-resistance at elevated temperature, which is 5 times than that of 45 normalized steel.