Formation Mechanism of CaS-Al2O3 Inclusions in Low Sulfur Al-Killed Steel After Calcium Treatment
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- 作者：Jianfei Xu ; Fuxiang Huang ; Xinhua Wang
- 刊名：Metallurgical and Materials Transactions B
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：47
- 期：2
- 页码：1217-1227
- 全文大小：2,393 KB
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Fuxiang Huang (1)
Xinhua Wang (1)
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, P.R. China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Materials Science
Manufacturing, Machines and Tools
Metallic Materials
Operating Procedures and Materials Treatment
Characterization and Evaluation Materials
Numerical and Computational Methods in Engineering - 出版者：Springer Boston
- ISSN：1543-1916
文摘
The laboratory experiments of alumina inclusions modified by calcium treatment in Al-killed steel were carried out at 1873 K (1600 °C), and the inclusions in steel samples were characterized at 1, 5, and 10 minutes after calcium addition. The results show that the type of inclusions after calcium treatment was determined by the sulfur and T.O contents of steel. CaS-Al2O3 inclusions were obtained in steels with high sulfur and low T.O contents. The mass ratio between CaS and Al2O3 was determined by T.Ca and T.O contents of steel. The influence of holding time after calcium addition on the composition of inclusions was negligible. The thermodynamics for the formation of CaS-Al2O3 inclusions after calcium treatment was discussed, and a simple formation mechanism was proposed. Moreover, the CaO, Al2O3, and CaS contents in the inclusions were predicted through the sulfur, total calcium (T.Ca), and T.O contents, and it was found that the CaO content decreases with increasing S/T.O, while (pctCaS)/(pctAl2O3)1/3 increases with increasing T.Ca/T.O.