(中南工業(yè)大學(xué)粉末冶金廠， 長沙 410083)
摘 要: 采用低壓熱等靜壓技術(shù)處理的礦山鑿巖硬質(zhì)合金得 到無孔隙的組織結(jié)構(gòu)，其抗彎強度值提高10%～15%，硬度HRA提高0.1～0.7，密度值也明顯提高。現(xiàn)場高風(fēng)壓鑿巖試驗表明其使用壽命較未經(jīng)處理的同類合金提高了1～2倍。
關(guān)鍵字: 硬質(zhì)合金 礦山鑿巖 低壓熱等靜壓
（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)
