一、前言迄今,矿山凿岩工具一直沿用含钴硬质合金。由于它具有高刚性和高耐磨性,几乎成为唯一的,不可取代的材料。但是世界钻资源的贫乏,国际钻价格的不断上涨(1969～1979年的十年间上涨了二十倍),加上矿用硬质合金消耗量大,经济矛盾突出,因此,人们一直在大力开发无钴或低钴硬质合金的研究和应用领域。我们从1979年开始,研究了一种不含钴 First, the foreword So far, mine rock drilling tools have been used cobalt-containing cemented carbide. Due to its high rigidity and high wear resistance, it becomes almost the only irreplaceable material. However, due to the lack of resources in the world drilling industry, the continuous rise in international diamond prices (a 20-fold increase in the ten years from 1969 to 1979), and the heavy consumption of hard metal alloys for economic conflicts, people have been vigorously developing Cobalt-free or low-cobalt carbide research and applications. We started in 1979, studied a cobalt-free