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
Effect of microstructure variation on corrosion properties of as-cast 0Cr23Ni13 stainless steel at high strain rate of hot compression
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
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 0Cr23Ni13 stainless steel during hot pressing, the content of low R coincident site lattice (RCSL) grain boundaries is increased, and the grain orientation is optimized. The results show that ferrite and austenite are completely recrystallized at 1050 and 1150 °C, 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 0Cr23Ni13 stainless steel. After the optimization of grain boundary distribution, corrosion resistance is noticeably improved due to the existence of low RCSL boundaries. The interference effect of low RCSL 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.
Abstract：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 0Cr23Ni13 stainless steel during hot pressing, the content of low R coincident site lattice (RCSL) grain boundaries is increased, and the grain orientation is optimized. The results show that ferrite and austenite are completely recrystallized at 1050 and 1150 °C, 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 0Cr23Ni13 stainless steel. After the optimization of grain boundary distribution, corrosion resistance is noticeably improved due to the existence of low RCSL boundaries. The interference effect of low RCSL 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.
Jun-chen Li,Meng-yuan Ye,Rui-dong Li, et al. Effect of microstructure variation on corrosion properties of as-cast 0Cr23Ni13 stainless steel at high strain rate of hot compression[J]. Journal of Iron and Steel Research International, 2023, 30(10): 2091-2100.
2023, Vol. 30 
