一、前言随着我国科学技术的发展,难加工材料不断涌现。这些材料中有的硬度很高;有的强度很大;有的粘性严重;有的加工硬化大;有的导热性差;给加工带来了极大困难,要求相应的刀具必须有很高的红硬性和优良的热强性。为了提高硬质合金的质量,以满足难加工材料切削的需要,人们研究了各种方法,其中之一是往硬质合金粘结相中添加一定的金属钨,并用这种方法研制出了性能优良的 I. Introduction With the development of science and technology in our country, hard-to-process materials continue to emerge. Some of these materials, high hardness; some strong; some viscous; some large work hardening; some poor thermal conductivity; brought great difficulties to the processing, requiring the corresponding tool must have a high red Hard and good thermal strength. In order to improve the quality of cemented carbide to meet the needs of cutting hard materials, people have studied a variety of methods, one of them is to cemented carbide cemented phase to add a certain amount of metal tungsten, and in this way has developed a performance good