我国一些部门使用的凿岩钎头,长期质量不稳定,使用寿命很低。主要原因是缺乏深入的理论研究,钎焊硬质合金的工艺不过关。这不仅浪费了大量硬质合金和钎体钢材,而且影响采掘效率的提高。为此,不少单位都围绕着提高钎头使用寿命的课题积极开展工作,并取得了可喜效果。我们在完成“中频真空钎焊潜孔钻头”试验研究及其技术推广工作的基础上,1978年根据冶金部的要求,进行了中、小钎头真 Rock drilling heads used by some departments in China have long-term unstable quality and low service life. The main reason is the lack of in-depth theoretical studies, brazing cemented carbide technology but off. This not only wastes a lot of hard alloy and brazing steel, but also affects the improvement of mining efficiency. To this end, many units have been working actively to raise the issue of the service life of solder bits and have achieved encouraging results. We completed the “IF vacuum brazing DTH drill bit” research and technical promotion work on the basis of 1978, according to the requirements of the Ministry of Metallurgical, carried out in the small drill really