Application of titanium silicon carbide to hard alloy

The invention relates to the powder metallurgy technology, and discloses a high-temperature-oxidation-resistant high-strength Ti3SiC2 hard alloy. The hard alloy is composed of tungsten carbide powder or tungsten carbide composite powder, cobalt powder and Ti3SiC2 powder, wherein the mass ratio of the Ti3SiC2 powder to the hard alloy is 0.1% to 5%; the purity of the Ti3SiC2 powder is larger than 98%, and the particle size is 0.01 micrometer to 10 micrometers. The Ti3SiC2 in the hard alloy can refine hard alloy grains, can hinder grain growth and can strengthen hard alloy compactness; and the actual density of either high-cobalt-alloy or low-cobalt-alloy can reach 99.9% of the theoretical density. 本发明涉及粉末冶金技术，是种耐高温氧化高强度TiSiC硬质合金。本发明由碳化钨粉或碳化钨复合粉和钴粉与TiSiC粉末组成，其中TiSiC粉末占合金的质量比为：0.1～5％；所述的TiSiC粉末纯度大于98％、颗粒尺寸为0.01～10μm。本发明合金中的TiSiC既能细化硬质合金晶粒，阻碍晶粒长大，又能增强硬质合金致密性；不论高钴或低钴合金，其实际密度可以达到理论密度的99.9％。