Effect of microstructure variation on corrosion properties of as-cast 0Cr23Ni13 stainless steel at high strain rate of hot compression  

作　　者：Jun-chen Li Meng-yuan Ye Rui-dong Li Xing-run Chen 

机构地区：[1]School of Material Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu,China [2]Xi'an Hantang Analysis and Testing Co.,Ltd.,Xi'an 710201,Shaanxi,China [3]Jiuquan Iron and Steel(Group)Co.,Ltd.,Jiayuguan 735100,Gansu,China

出　　处：《Journal of Iron and Steel Research International》2023年第10期2091-2100,共10页

基　　金：This research was financially supported by the Science and Technology Major Project of Gansu Province(Grant No.17ZD2GB012);the City Key Research and Development Plan of Jiayuguan(Grant Nos.20-16).

摘　　要：The optimization of hot compression technique of as-cast 0Cr23Ni13 stainless steel at high strain rate was discussed,and its corrosion resistance was evaluated after hot compression treatment experimentally.By adjusting the dynamic recrys-tallization(DRX)ratio of 0Cr23Nil3 stainless steel during hot pressing,the content of low Σ coincident site lattice(ΣCSL)grain boundaries is increased,and the grain orientation is optimized.The results show that ferrite and austenite are completely recrystallized at 1050 and 1150℃,respectively.The number of grains in the<111>and<101>directions increases significantly,the corrosion potential increases,and the corrosion current density decreases,which will signifi-cantly improve the corrosion resistance of 0Cr23Nil3 stainless steel.After the optimization of grain boundary distribution,corrosion resistance is noticeably improved due to the existence of lowΣCSL boundaries.The interference effect of lowΣCSL grain boundary on random grain boundary network becomes intense with the increase in DRX ratio,which is the fundamental measure to improve the corrosion resistance.

关 键 词：OCr23Ni13 stainless steel Hot compression Dynamic recrystallization LowΣcoincident site lattice Corrosion resistance 

分 类 号：TG142.71[一般工业技术—材料科学与工程]