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随着科学技术的发展,新型的刀具材料层出不穷,以适应不同的加工条件,氮化硅工程陶瓷材料就是其中的一种。近年来经大量的切削试验和国内不少单位的试用,充分说明它是一种切削性能优异,工艺性能良好,经济效果明显的刀具材料。作为切削刀具,氮化硅的硬度达HRA 91～92,而切削温度可达1100～1300℃,许用切削速度超过硬质合金,而抗弯强度,冲击韧性不低于硬质合金中的YT30,并且氮化硅有其显微硬度高(HV 5000),
With the development of science and technology, an endless stream of new cutting tool materials to adapt to different processing conditions, silicon nitride ceramic materials is one of them. In recent years, after a large number of cutting tests and many domestic units of the trial, fully demonstrated that it is a cutting performance, good process performance, economic effect of the obvious tool material. As a cutting tool, silicon nitride hardness of HRA 91 ~ 92, and cutting temperature up to 1100 ~ 1300 ℃, the allowable cutting speed over the cemented carbide, and the bending strength, impact toughness is not lower than the cemented carbide YT30 , And silicon nitride has its high microhardness (HV 5000),