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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示有着重要意义。许多产品的技术条件都对晶粒度有要求,但经常遇到的某些组织,用一般试剂腐蚀,无法显示奥氏体晶粒,因此寻找显示效果良好的方法,就成为生产中迫切要求解决的问题。试验方法 1.试样和热处理: 试验钢号:30CrMoA,34CrNi3Mo,30CrMnSi,40Cr,9Cr2MoV。试样的热处理及其组织:30CrMoA,34CrNi3Mo,30CrMnSi在860℃加热水淬后于600℃回火(保温1
In order to identify the quality of the material and the correctness of the quenching procedure, it is of great significance to display the austenite grains after heat treatment. Many of the technical conditions of the product have requirements for grain size, but some of the most frequently encountered organizations are corroded with common reagents and fail to show austenite grains, so looking for a method that shows good results becomes an urgent requirement in production The problem. Test methods 1. Specimens and heat treatment: Test steel: 30CrMoA, 34CrNi3Mo, 30CrMnSi, 40Cr, 9Cr2MoV. Sample heat treatment and its organization: 30CrMoA, 34CrNi3Mo, 30CrMnSi at 860 ℃ water quenching after tempering at 600 ℃ (heat 1