一、简介人造金刚石等超硬材料的问世是磨料磨具发展到一个新水平的重要标志。我国在五十年代发展了碳化硼,六十年代发展了人造金刚石,七十年代末试验投产了立方氮化硼。碳化硼是一种用电阻炉冶炼成的黑色晶 I. Introduction The advent of super-hard materials such as synthetic diamond is an important symbol of the development of abrasive abrasives to a new level. China developed boron carbide in the 1950s, artificial diamond was developed in the 1960s, and cubic boron nitride was put into trial production in the late 1970s. Boron carbide is a kind of black crystal made by resistance furnace