The tempering embrittlement results from the precipitation and growth of M_6Ccarbides particles and the segregation of phosphorus at prior austenite grain boundaries.
其高温回火脆性是晶界上m_6c碳化物的析出长大和由此所产生的晶界磷偏聚共同作用的结果。
2
The analysis show that the main reason to easy erode austenite grain boundary after tempering is the precipitation situation of carbide.