Effect of Mg addition on temper embrittlement in 2.25Cr–1Mo steel doped with 0.056% P–Mg segregation behavior at grain boundary  

作　　者：Xiao-bing Li Xin Dong Peng-xiang Zhao Wei-wei Xing Lei-lei Ding Nan-nan Zhang Ying-che Ma Kui Liu 

机构地区：[1]Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Science,Shenyang,110016,Liaoning,China [2]CAS Key Laboratory of Nuclear Materials and Safety Assessment,Shenyang,110014,Liaoning,China [3]School of Materials Science and Engineering,Shenyang University of Technology,Shenyang,110870,Liaoning,China [4]School of Materials Science and Engineering,University of Science and Technology of China,Hefei,230026,Anhui,China

出　　处：《Journal of Iron and Steel Research International》2021年第10期1259-1267,共9页

基　　金：The authors thank the National Natural Science Foundation of China for their financial support under contract No.51801210.

摘　　要：To verify the microalloying function and segregation behavior of trace Mg at grain boundary in steel,the 2.25Cr–1Mo steel doped with 0.056%P containing different Mg contents was refined with a vacuum-induction furnace.The effects of trace Mg addition on the temper embrittlement susceptibility of 2.25Cr–1Mo steel were studied by step-cooling test and the segregation behavior of Mg at grain boundary was explored by Auger electron spectroscopy.It is shown that P-induced temper embrittlement susceptibility can be reduced after subjecting to step-cooling treatment with trace Mg addition,mainly benefited from the segregation of Mg at grain boundary.This segregation can decrease the segregation amounts of P and S,especially for P,and increase the grain boundary cohesion,reducing the adverse effect on temper embrittlement caused by P and S.

关 键 词：2.25Cr-1Mo steel Temper embrittlement Mg P SEGREGATION Auger electron spectroscopy 

分 类 号：TF70[冶金工程—钢铁冶金]