为了鉴定材料的质量和淬火规程的正确性,对热处理后的奥氏体晶粒的显露有着重要意义。许多产品的技术条件都规定有对晶粒度的要求,但经常遇到某些类型的组织,其奥氏体晶粒用一般试剂腐蚀无法显露出来,因此寻找效果良好的显露晶粒的方法,就成了生产中迫切要求解决的问题。 In order to identify the quality of materials and the correctness of quenching procedures, the heat treatment after the austenite grain is of great significance. Many of the technical requirements of the product are provided with the grain size requirements, but often encounter some types of organizations, the austenitic grain with the general agent can not be exposed corrosion, so look for good results show that the method of grain, It became an urgent problem to be solved in production.