高速钢中的碳化物颗粒大小、形状及分布对钢的性能有很大的影响。尤其是钢中的宽带状碳化物堆积与大块角状碳化物的存在,会降低钢的塑性、韧性、强度和硬度,增大钢的脆性和热处理过热敏感性。因此评定高速钢中的碳化物偏析等级是检验钢材质量好坏的重要因素之一。从我厂多年的工具生产中,也经常出现过热和裂纹,在废品分析中,经常遇到高速钢中的宽带状碳化物堆积和大块角状碳化物 The size, shape and distribution of carbide particles in HSS have a great influence on the properties of steel. In particular, the presence of broad-band carbides and large horn-like carbides in steel reduces the plasticity, toughness, strength and hardness of the steel and increases the brittleness of steel and the hyperthermal sensitivity to heat treatment. Therefore, the assessment of high-speed steel carbide segregation level is to test the quality of steel is one of the important factors. Over many years of tooling in our plant, overheating and cracking have also frequently occurred. In scrap analysis, we often encounter the accumulation of broad-banded carbides in high-speed steels and the large horn-like carbides