Ni-Cr钢中P的非平衡晶界偏聚现象  

Non-equilibrium grain-boundary segregation of phosphorus in Ni-Cr steel

作　　者：司红[1,2] 王凯[1] 朱衍勇[1] 于广华[2] 

机构地区：[1]钢铁研究总院,北京100081 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《金属热处理》2011年第9期6-9,共4页Heat Treatment of Metals

基　　金：国家自然科学基金(51001030);北京市教育委员会共建项目;中国钢研科技集团有限公司基金项目(事10050130A;事09050700A)

摘　　要：采用Auger电子能谱仪分析了经过1000℃淬火后600℃时效过程的Ni-Cr钢中元素磷的晶界偏聚浓度,得到晶界P的偏聚浓度随时效时间变化的动力学曲线。结果表明,Ni-Cr钢在600℃时效60 min时,P的晶界偏聚浓度出现极大峰值,与平衡晶界偏聚模型不符。利用溶质的非平衡晶界偏聚模型进行分析,证实这是由于钢中P的非平衡偏聚临界时间现象引起的。Through the analysis of phosphorus grain-boundary concentrations in Ni-Cr steel during aging at 600 ℃ after quenching at 1000 ℃ by Auger electron spectroscopy,the aging time-dependant kinetic curve of phosphorus concentrations at grain boundary was studied.The results show that the phosphorus concentration reaches a peak at about 60 min during aging at 600 ℃,which is not comformable to the model of equilibrium grain-boundary segregation.Being analyzed by the model of non-equilibrium grain-boundary segregation,the peak is induced by the critical time for phosphorus non-equilibrium grain-boundary segregation.

关 键 词：Ni-Cr钢 磷 非平衡晶界偏聚 

分 类 号：TG113.1[金属学及工艺—物理冶金]