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无产阶级文化大革命的伟大胜 利和批林批孔运动的大好形势,推 动着我国机械工业的迅速发展.各 种新材料、新钢种不断涌现,原有各种高速钢、硬质合金甚至金刚石都已难于适应某些机械加工的要求,形势迫使我们去研制其它新型加工材料.立方氮化硼就是一种良好的新型机械加工工具材?
The great victories of the Great Proletarian Cultural Revolution and the favorable situation of “criticizing the proletarian and proletarian movements” have promoted the rapid development of the machinery industry in our country. All kinds of new materials and new types of steel continue to emerge. All kinds of high-speed steels, cemented carbides and even diamonds Has been difficult to meet the requirements of some machining, the situation forced us to develop other new processing materials. Cubic boron nitride is a good new type of mechanical processing tool material?