The effect of sintering process on properties of cemented carbide

High energy ball mill for Ultrafine WC-Co composite powder, the powder obtained by controlling the milling time is not, respectively, with spark plasma sintering and vacuum sintering process for the preparation of cemented carbide. Utilization of balance, scanning electron microscopy and other equipment, to study the system performance and the impact of sintering of cemented carbide microstructure hardness, density, flexural strength right. The results show that: the discharge plasma sintering compared with vacuum sintering, can effectively reduce the porosity alloy, carbide organizational structure is more dense, so it is possible to improve the quality of the physical and mechanical performance of the alloy, milling 50h, at 1200℃can obtain a density of 14.32g/cm3, Rockwell hardness HRA90.4, 2100MPa flexural strength of overall performance is more superior carbide.