一、问题的提出硬质合金钎头是采掘部门必不可少的工具。目前普遍使用的一字形钎头,其主要失效形式之一是裤体出现胀裂。根据矿山凿岩现场的实际调查,钎头在使用中早期出现裤体胀裂约占5~10%,从而造成凿岩费用增加、硬质合金和钢材的大量浪费。本文从钎头 First, the question raised Carbide drill bit is an indispensable tool for the mining sector. One of the main forms of failure of the currently used brazing bit is cracking of the body. According to the actual investigation on the scene of mine rock drilling, there are about 5% to 10% of the drill body cracks appearing in the early stage of drilling, resulting in the increase of rock drilling cost and the waste of hard alloy and steel. This article from the bit