为了提高金属的切削速度,在美国除了对陶瓷切削工具研究以外,还盛行着对涂层和无涂层硬质合金材料的研究。由于美国对新的优秀的硬质合金基体材料和涂料的深入研究,今后有涂层和无涂层的碳化钨和碳化钛的切削工具的应用将在美国得到推广和迅速的发展。碳化钨出世已有50年的历史,相继研 In order to improve the metal cutting speed, in addition to ceramic cutting tools in the United States, the prevalence of coated and uncoated cemented carbide materials. As the United States on the new excellent cemented carbide substrate materials and coatings in-depth study of the future with coated and uncoated tungsten carbide and titanium carbide cutting tool applications will be promoted in the United States and rapid development. Tungsten carbide was born 50 years of history, have been studied