Study on liquid phase sintering process of hard cladding materials

Steel based carbide and steel hardened cladding materials FC-I and FC-II have been manufactured successfully by liquid sintering process. The surface hardness of FC-I and FC-II after heat treatment are 6.418 MPa(HV) and 5.580 MPa (HV) respectively. Sintering parameters obtained by studying the liquid phase sintering process are as follows: sintering temperature of FC-I and FC-II are 1 300°C and 1 280°C respectively, temperature raising rate of solid phase sintering and liquid phase sintering are 10-15°C/min and 5°C/min respectively, isothermal holding time is 20-60 min. Microstructure of FC-I and FC-II has been studied using SEM and XRD. Results show that the main composition of the cladding layer of FC-I and FC-II are α-Fe, Fe3W3C and Ni based solid solution, Fe3W3C and α-Fe respectively.