Hostname: page-component-8448b6f56d-xtgtn Total loading time: 0 Render date: 2024-04-16T21:01:55.317Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of TiO2 addition to LF refining slag on the Ti, Al, and cleanliness of Ti-stabilized stainless steel

Published online by Cambridge University Press:  12 August 2014

G.-Y. Qian ,
F. Jiang ,
G.-G. Cheng  and
C.-S. Wang
G.-Y. Qian
Affiliation:
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P.R. China. e-mail: qianguoyu_yejin@126.com
F. Jiang
Affiliation:
Xingtai Iron and Stee1 Corp.LTD, Xingtai Hebei, Hebei 54027, P.R. China
G.-G. Cheng
Affiliation:
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P.R. China. e-mail: qianguoyu_yejin@126.com
C.-S. Wang
Affiliation:
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P.R. China. e-mail: qianguoyu_yejin@126.com
Get access

Abstract

The influence of TiO2 addition to LF refining slag on Ti-stabilized stainless steel was evaluated using a vacuum induction furnace at 1873 K. The effect of CaO-SiO2-MgO-Al2O3 basic slags with different TiO2 contents on the titanium loss, aluminum loss and total oxygen content in the steel was studied. It was observed that the oxidation rate of Ti first decreases and then increases with the increase in the content of TiO2 in slag and reaches the minimum when 8%TiO2 is added to the slag. However, the change in the oxidation rate of Al shows the opposite tendency. The total oxygen in the molten steel remains unchanged with time when 8%TiO2 is added to the slag, and the total oxygen of the others increases monotonically with time. The activities of TiO2 and Al2O3 from the calculation of the ion and molecule coexistence theory (IMCT) in the initial slag present the same change tendency, and both first increase and then decrease with the gradual increase in TiO2 in the slag and reach the maximum when 8%TiO2 is added to the slag. The results of a kinetic analysis showed that the rate-determining step of the oxidation of Ti in the steel is the mass transfer on the slag side, and the rate-determining step of the oxidation of Al in the steel is the mass transfer on the metal side.

Keywords

TiO2LF refining slagoxidation rateTi yieldTi-stabilized stainless steel
Type
Research Article
Information
Metallurgical Research & Technology , Volume 111 , Issue 4 , 2014 , pp. 229 - 237
Copyright
© EDP Sciences 2014

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

J.L., Cavazos, I., Gomez, M.P., Guerrero-Mata, Mater. Sci. Technol. 27 (2011) 530-536
Lee, Y.D., Park, S.H., J. Korean Inst. Met. Mater. 31 (1993) 984
R.C. Nunnington, N. Sutcliffe, Electric furnace conference proceedings, 2001, pp. 361-394
D.S. Kim, J.J. Pak, H.S. Song, Y.K. Shin, B.H. Choi, S.S. Yim, steelmaking conference proceedings, 1993, pp. 291-297
Gao, Y., Sorimachi, K., ISIJ Int. 33 (1993) 291-297
D.S. Kim, H.S. Song, Y.D. Lee, Y. Chung, A.W. Cramb, Steelmaking conference proceedings, 1997, pp. 145-152
R. Maddalena, R. Rastogi, S. Bassem, A.W. Cramb, ISS Transactions, 2000, pp. 71-79
Kato, R., Fujiwara, M., Tahjiri, Y., Fujiwara, K., Steel Res. Int. 82 (2011) 543-551
J. Zhang, Computational Thermodynamics of Metallurgical Melts and Solutions, Metallurgical Industry Press, Beijing, 2007
Yang, X., Jiao, J., Ding, R., Shi, C., Guo, H., ISIJ Int. 49 (2009) 1828-1837
Yang, X., Shi, C., Zhang, M., Chai, G., Wang, F., Metall. Mater. Trans. B 42 (2011) 1150-1180
Li, X., Ding, Y., Wang, B., J. Iron. Steel. Res. 24 (2012) 19-23
J. Chen, Steel commonly used chart data manual. Metallurgical Industry Press, Beijing, 1984
Okuyama, G., Yamaguchi, K., Takeuchi, S., Sorimachi, K., ISIJ Int. 40 (2000) 121-128
Mori, K., Hiwasa, S., Kawai, Y., J. Jap. I. Met. 44 (1980) 1282