非平衡组织多次重复高温加热淬火细化晶粒研究  

Grain refining of non equilibrium structure by multiple high-temperature heating and quenching treatment

作　　者：党淑娥[1] 侯微[1] 刘建生[1] 王子荣[1] 刘海龙[1] 秦尚武[1] 

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024

出　　处：《金属热处理》2017年第1期139-143,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(51275330);山西省自然科学基金(2012011022-4)

摘　　要：将低压转子钢30Cr2Ni4Mo V粗大非平衡组织多次重复高温加热、保温适当时间淬火,分析α相再结晶程度对细化晶粒的影响。结果表明:经910~1000℃单次高温加热、淬火后,其晶粒度达5.5~6级;两次重复高温加热910℃×2 h细化效果较好,晶粒度达8级;三次重复高温加热910℃×2 h,促进了α相发生完全再结晶,实现晶粒均匀化。The non-equilibrium structure of the 30Cr2Ni4MoV lower-pressure rotor steel was multiple reheated at high-temperature and holding for proper time then quenched. The effect of α-phase recrystallization on austenite grain refinement was analyzed. The results show that the grain grade can be 5.5-6.0 after a single heating and quenching at high temperature range from 910 ℃ to 1000 ℃. After two times heated and quenched at 910 ℃ for 2 h, the refineing effect is better and the grain grade can reach 8. And after three times heated and quenched at 910 ℃ for 2 h, the a-phase full recrystallization occurs and grain homogenization is achieved.

关 键 词：30CR2NI4MOV钢 遗传机理 非平衡组织 重新加热 细化晶粒 

分 类 号：TG156.1[金属学及工艺—热处理]