20CrMnTi钢过热淬火及高温回火后在慢速(1℃/min)加热时出现过热粗大奥氏体晶粒的遗传。其原因是转变时形成了位向大致相同的针状奥氏体,这些奥氏体相互合并成一个粗大奥氏体晶粒。出现组织遗传后继续提高温度对,没有发现使粗大奥氏体晶粒重新细化的再结晶,而只是晶粒长大。文中对上述实验现象进行了讨论。 20CrMnTi steel overheating and high temperature tempering at slow (1 ℃ / min) heating overheating coarse austenite grain inheritance. The reason for this is that the austenite in the form of approximately the same orientation is formed during the transformation, and these austenites merge with each other to form a coarse austenite grain. After the occurrence of tissue genetic continue to increase temperature, found no recrystallization of coarse austenite grain refinish, but only grain growth. The article discussed the above experiment phenomenon.