我国目前生产的硬质合金小钎头,在硬岩中的平均寿命仅20～30米左右,每年钎头耗用资金一亿五千万元,1965年曾把钎头列为国家十年科研规划中的重点项目。1979年,我们承担了冶金部下达的“提高中、小钎头质量”的研究课题,经现场试验,取得了较好效果,在中硬岩石中钎头平均寿命达222米,在硬岩中达50米。Z40、Z43球齿钎头已由冶金部科技办主持通过鉴定转产。 China’s current production of hard alloy small solder head, the average life expectancy of hard rock is only about 20 to 30 meters, annual solder head consumption of 150 million yuan of funds, in 1965 once the drill bit as a national decade of scientific research Planning of key projects. In 1979, we undertook the research project entitled “Improving the Quality of Medium and Small Drills” issued by the Ministry of Metallurgy. After field tests, we achieved good results. The average life of the drill bit in medium-hard rocks is 222 meters. In hard rock Up to 50 meters. Z40, Z43 ball tooth bit by the Ministry of Metallurgical Technology Office presided over the identification of conversion.