Influence of Heat Treatment Process on Microstructure of LGJW20
WC/steel composite(LGJW20) was prepared by centrifugal casting using scrap bearing steel GCr15 and WC powder.The influences of heat treatment on the microstructure of LGJW20 were studied.The results show that carbides in microstructure dissolve and separate during annealing,which improve the shapes of carbide and increase the hardness of material.During quenching and tempering,dissolution and separation of carbides in microstructure become more seriously with the tempering temperature increasing,and the hardness of the composite reduces.