Abstract
Inclusion has an important effect on quality of high speed rail steel. In consideration of the lower acceptance percentage of the inclusion and its constraint against the requirement for large scale production of 350 km/h high speed rail steel in Panzhihua Iron and Steel (Group) Co, the technology of nonmetallic inclusion control for 350 km/h high speed rail steel was studied. An optimized model of the argon-blowing in ladle furnace (LF), the control of the components of the ladle slag, and the technique of calcium treatment for the molten steel was brought forward. Using the researched technology, the removal ratio of the inclusion was increased and the components, distribution, and shape of the inclusion in the rail steel were changed, which resulted in a reduction in the average total oxygen content to 10.17 × 10−6 and an increase in the comprehensive acceptance percentage of the nonmetallic inclusion from 48.21% to 98.1%. Test has shown that this metallurgical technology can meet the requirement for large scale production of 350 km/h high speed steel in Panzhihua Iron and Steel (Group) Co.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
ZHOU Qing-yue. Provisional Technical Specification for 350 km/h Passenger-Transport Special Railway With 60 kg/m Rail Steel [S]. Railway Technology (2004) No. 120, Ministry of Railway of the People’s Republic of China. P. 1 (in Chinese).
SHUI Zhi. Out-qf-Ladle Refining of Special Steel [M]. Beijing: Atomic Energy Press, 1996 (in Chinese).
Ицкович Г М. Steel Deoxidation and Denaturalization of Non-metal Inclusions [M]. LI Zhi-fu, trans. Beijing: Metallurgical Industry Press, 1991.
DONG Lu-ren. Massive Nonmetal Inclusion in Steel [M]. Beijing: Metallurgical Industry Press, 1991 (in Chinese).
Чуйко Н М. Out-of-Ladle Refining Technique for Improvement of Steel Quality [M]. WANG Chang-lin, trans. Beijing: Metallurgical Industry Press, 1983 (in Chinese).
Ohnishi K, Matsuhide A. Study on Inclusion Removal of Ladle Argon Blowing Process [J]. Tetsu-to-Hagane, 1979, 65(11): 213 (in Japanese).
Kawakami K, Takahashi K. Optimal Parameters of Clean Steel Production During LF Refining [J]. Tetsu-to-Hagane, 1983, 69(2): 33 (in Japanese).
Jonsson L, Jonsson P. Modeling of Fluid Flow Conditions Around the Slag/Metal Interface in a Gas-Stirred Ladle [J]. ISIJ International, 1996, 36(9): 1127.
WU Wei. Deoxidation Process on Condition of Low Aluminum for Heavy Rail Steel [J]. Journal of Iron and Steel Research, 2006, 18(S1): 74 (in Chinese).
FAN Ding-dong. Research on Controlling of Sulfide Inclusion Classification in LF-VD Process [J]. Iron and Steel, 2002, 37 (2): 14 (in Chinese).
Lu D Z, Irons G A, Lu W K. Calculation of CaS and MnS Activities and Their Application to Calcium Treatment of Steel [J]. Iron-Making and Steel-Making, 1991, 18(5): 342.
HUANG Xi-hu. Principle of Steel Metallurgy [M]. 3rd ed. Beijing: Metallurgical Industry Press, 2005 (in Chinese).
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation Item: Item Sponsored by Key Technologies Research and Development Program for the 10th Five-Year Plan (2004BA317B)
Rights and permissions
About this article
Cite this article
Zhao, Kw., Zeng, Jh. & Wang, Xh. Nonmetallic inclusion control of 350 km/h high speed rail steel. J. Iron Steel Res. Int. 16, 20–26 (2009). https://doi.org/10.1016/S1006-706X(09)60038-8
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1016/S1006-706X(09)60038-8