(中南工业大学粉末冶金厂， 长沙 410083)
摘 要: 采用低压热等静压技术处理的矿山凿岩硬质合金得 到无孔隙的组织结构，其抗弯强度值提高10%～15%，硬度HRA提高0.1～0.7，密度值也明显提高。现场高风压凿岩试验表明其使用寿命较未经处理的同类合金提高了1～2倍。
关键字: 硬质合金 矿山凿岩 低压热等静压
（Powder Metallurgy Factory, Central South University of Technology, Changsha 410083）
Abstract:The rock drilling cemented carbides treated by low-pressure hot isostatic pressing (HIP) technique have been gained porous-free structure, whose bending strength is raised ten to fifteen percent, hardness HRA is raised 0.1～0.7, the density is also raised obviousl y. In addition drilling experiment carried out under 1.4～1.6 MPa pressurized air proved that the average drilling advance arries 738.6 m per bit in pegmatic granite, which is one to two times higher than that of the original bit used under the same condition.
Key words: cemented carbide rock drilling low-pressure hot isostatic pressing(HIP)
