2.25Cr-1Mo钢后续热处理中的磷偏聚行为  

Segregation Behavior of Phosphorus for 2.25Cr-1Mo Steel at Subsequent Heat Treatment Process

作　　者：张喜亮[1] 刘涛[1] 崔国华[1] 周昌玉[2] 刘争[1] 张维[1] 

机构地区：[1]河北工程大学装备制造学院,河北邯郸056038 [2]南京工业大学机械与动力工程学院,南京210009

出　　处：《材料工程》2014年第10期59-64,共6页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(51175143);河北省教育厅青年基金项目(QN20131104);邯郸市科技局科技支撑项目(1321120082)

摘　　要：根据溶质晶界偏聚理论和原子扩散原理研究了2.25Cr-1Mo钢服役12年后磷晶界偏聚行为及脱脆处理工艺。采用俄歇电子能谱实验对溶质原子的晶界偏聚程度进行了测试分析。结果表明:对于已脆化的2.25Cr-1Mo钢,存在临界脆化温度,且脆化程度越高,临界脆化温度越低;高于临界脆化温度数小时的保温即可消除脆化现象,即2.25Cr-1Mo钢的脱脆速率远大于脆化速率。Grain boundary segregation behavior of phosphorus and de-embrittled treatment process for 2.25Cr-1Mo steel served 12 years were investigated in terms of the grain-boundary segregation and atomic diffusion theory. The segregation degree of phosphorus was tested by virtue of Auger electron spectrum. The results show that there is a critical embrittlement temperature corresponding to 2.25Cr-lMo steel embrittled, and the critical embrittlement temperature will decrease as the embrittlement degree increases. Furthermore, the embrittlement can restore to its original state in a few hours at the temperature higher than the critical embrittlement temperature. That is, de-embrittlement rate is much faster than embrittlement rate for 2.25Cr-lMo steel.

关 键 词：脱脆 2.25CR-1MO钢 晶界偏聚 磷 

分 类 号：TG111.2[金属学及工艺—物理冶金]