Preparation of WC-5TiC-10Co nanometer powder and performance study of sintering samples

摘要

In this paper, the WC-5TiC-10 Co mixture mixed by WC2.96μm, (Ti, W)C 2.52μm and Co2.38μm and prepared by high-energy ball milling. The result shows: After 60h's ball milling the powder began to reunite more and more as the time extended. The average grain size of powder is 50 nm after 144h. After 1300°C～1400°C vacuum-sintering the hardness of the sample is 94.8～95.4HRA. 4.2～5.2 HRA higher than the traditional cemented carbides with the same composition. After 1400°C vacuum-sintering the compressive strength and flexural strength of cemented carbides is 2060 MPa and 1200 MPa. Slightly less than the traditional cemented carbides with the same composition.