The WC-8Co cemented carbides were sintered at low temperature and pressure.The influences of sintering temperature and pressure on the microstructure and properties of the cemented carbides were investigated.Results showed that with the increase of sintering temperature, the quantity of pores decreases, the grain size and density of the cemented carbides increase simultaneously.The hardness and bending strength of the cemented carbides are improved with the increase of density.When the sintering temperature is above 1 280 ℃, the sintering method of the cemented carbides is liquid-phase sintering.The improvement of density is contributed to the sintering pressure .When the sintering temperature is 1 300 ℃ and the sintering pressure is 5 MPa, the density, hardness and bending strength of the cemented carbides are 14.61 g/cm3, 90.7 HRA and 1 830 MPa, respectively.
