第三届全国采掘、地质钻具使用技术研讨会于1991年5月28日至31日在珠海市举行。来自十六个省、市的52个单位的90余名代表参加了这次会议。主办者从来自全国各地的应征稿件中选辑了33篇编成会议文集,这些文章基本上反映了上届会议以来我国硬质合金材料和钻具的生产和应用的发展情况。代表们在发言中指出:1.我国的硬质合金材料和钻具的生产已经达到很高的水准。首先,近年来我国硬质合金材料的研究和生产有了较大的突破,形成了种类齐全的新牌号系列。我国的钻头生产厂家已有可能根据岩石条件不同的用户要求,选用适当的硬质合金材料生 The 3rd National Mining and Geological Drilling Technology Seminar was held in Zhuhai from May 28 to May 31, 1991. More than 90 delegates from 52 units in 16 provinces and cities participated in the conference. The sponsors selected a compilation of 33 compiled proceedings from the solicitation papers from all over the country. These articles basically reflect the development of the production and application of China’s cemented carbide materials and drilling tools since the last session. In their speeches, the deputies pointed out: 1. The production of cemented carbide materials and drilling tools in China has reached a very high standard. First of all, in recent years, our country cemented carbide material research and production have a greater breakthrough, formed a complete range of new brand series. China’s bit manufacturers have been based on rock conditions may have different user requirements, the choice of appropriate carbide material students