抄録
Hardfacing layers for steels were obtained with the paste of tungsten carbide (WC) containing a Ni-P alloy by the three heating methods; electric furnace, hot press and argon arc. It was found that the hardness of the layers was affected by the method of heating as well as the content of WC and that under present experimental conditions the hardness was highest in the method of heating by electric furnace. The characteristics of the hardfacing layers were influenced by the method of heating. A high wettability of WC with a Ni-P alloy caused the microstructures of the layers to be dense and uniform. A diffusion layer about 10-15μm in thickness lying between the hardfacing layer and the substrate showed a high bond strength for adhesion. Double carbides phase (η-phase) was found in the hardfacing layer obtained in the method of heating by argon arc.
