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Volume 25 Issue 3
Mar.  2018
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文章导航 >  矿物冶金与材料学报（英文）  > 2018  >  25(3): 280-287
Jing Guo, Shu-sen Cheng, Han-jie Guo,  and Ya-guang Mei, Novel mechanism for the modification of Al2O3-based inclusions in ultra-low carbon Al-killed steel considering the effects of magnesium and calcium, Int. J. Miner. Metall. Mater., 25(2018), No. 3, pp. 280-287. https://doi.org/10.1007/s12613-018-1571-1
Cite this article as:
Jing Guo, Shu-sen Cheng, Han-jie Guo,  and Ya-guang Mei, Novel mechanism for the modification of Al2O3-based inclusions in ultra-low carbon Al-killed steel considering the effects of magnesium and calcium, Int. J. Miner. Metall. Mater., 25(2018), No. 3, pp. 280-287. https://doi.org/10.1007/s12613-018-1571-1
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研究论文

Novel mechanism for the modification of Al2O3-based inclusions in ultra-low carbon Al-killed steel considering the effects of magnesium and calcium

  • School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing 100083, China;

  • Beijing Key Laboratory of Special Melting and Reparation of High-end Metal Materials, University of Science and Technology Beijing, Beijing 100083, China

  • 通讯作者:

    Jing Guo    E-mail: guojing@ustb.edu.cn

  • Many researchers have explored the inclusion modification mechanism to improve non-metallic inclusion modifications in steelmaking. In this study, two types of industrial trials on inclusion modifications in liquid steel were conducted using ultra-low-carbon Al-killed steel with different Mg and Ca contents to verify the effects of Ca and Mg contents on the modification mechanism of Al2O3-based inclusions during secondary refining. The results showed that Al2O3-based inclusions can be modified into liquid calcium aluminate or a multi-component inclusion with the addition of a suitable amount of Ca. In addition,[Mg] in liquid steel can further reduce CaO in liquid calcium aluminate to drive its evolution into CaO-MgO-Al2O3 multi-component inclusions. Thermodynamic analysis confirmed that the reaction between[Mg] and CaO in liquid calcium aluminate occurs when the MgO content of liquid calcium aluminate is less than 3wt% and the temperature is higher than 1843 K.
    • Research Article

    Novel mechanism for the modification of Al2O3-based inclusions in ultra-low carbon Al-killed steel considering the effects of magnesium and calcium

    + Author Affiliations
      Abstract
    • Many researchers have explored the inclusion modification mechanism to improve non-metallic inclusion modifications in steelmaking. In this study, two types of industrial trials on inclusion modifications in liquid steel were conducted using ultra-low-carbon Al-killed steel with different Mg and Ca contents to verify the effects of Ca and Mg contents on the modification mechanism of Al2O3-based inclusions during secondary refining. The results showed that Al2O3-based inclusions can be modified into liquid calcium aluminate or a multi-component inclusion with the addition of a suitable amount of Ca. In addition,[Mg] in liquid steel can further reduce CaO in liquid calcium aluminate to drive its evolution into CaO-MgO-Al2O3 multi-component inclusions. Thermodynamic analysis confirmed that the reaction between[Mg] and CaO in liquid calcium aluminate occurs when the MgO content of liquid calcium aluminate is less than 3wt% and the temperature is higher than 1843 K.
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