文献类型：期刊文献

英文题名：Improving cleanliness of SWRS82B steel by rare earth-containing refining slag

作者：Liu, Ruixuan Deng, Siqi Wei, Fulong Qin, Zhuo Li, Shen Chen, Chaoyi Li, Xiang Li, Junqi Wang, Linzhu

第一作者：Liu, Ruixuan

通信作者：Wang, LZ[1]

机构：[1]Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China;[2]Zhejiang Univ, Sch Med, Hangzhou 310058, Zhejiang, Peoples R China;[3]Shougang Grp Shuicheng Steel Co, Liupanshui 553028, Guizhou, Peoples R China;[4]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550025, Guizhou, Peoples R China

第一机构：Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China.

年份：2026

卷号：123

期号：5

外文期刊名：METALLURGICAL RESEARCH & TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001834044500001)】；

基金：This research was supported by the National Natural Science Foundation of China (Nos. 52274331, 52264041 and 52574379), Guizhou Basic Research Program (Natural Science) Talent Team Lift Project (QNB[2025]005) and Guizhou Provincial Basic Research Program (Natural Science) (ZK [2023] Zhongdian 020). Additionally, this work was supported by Guizhou Provincial Young Elite Scientist Sponsorship Program (No. Gasty-ess202405), Natural Science Research Project of Guizhou Provincial Department of Education ([2022]041) and Guizhou University Innovation Talent Team project [2023]04.

语种：英文

外文关键词：SWRS82B; cleanliness; refining slag; CeO2 addition

摘要：SWRS82B steel has high requirements for inclusions and optimization of refining slag is crucial for the control of inclusion characteristics. The effect of CeO2 in refining slag on SWRS82B steel cleanliness was investigated at 1873 K by thermodynamic calculations and microstructural characterization. The results indicated that the 5 wt% CeO2-added refining slag exhibited the optimal effect on improving the cleanliness of SWRS82B. The oxygen content decreased to 0.0016% and the sulfur content decreased to 0.0032% in the steel refined by slag with 5 wt% CeO2. The average size of inclusions in steel decreased from 2.71 mu m to 1.71 mu m. The number density of inclusions decreased from 172 to 121 per mm(2) and the high-temperature deformability of inclusions was improved. Thermodynamic calculations indicated that SiO2 activity decreased with increasing content of CeO2 in refining slag, thereby lowering the equilibrium oxygen content in the steel. The addition of CeO2 depolymerized the [Si-O] structure in slag, reducing its polymerization and improving reaction kinetics. Meanwhile, increasing CeO2 addition raised the Ce3+ content in the slag, leading to an increase in dissolved oxygen in the molten steel. The mechanism of oxygen transmission and reaction in gas-slag-molten steel was discussed in this study.