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Distribution of nonmetallic inclusions in molten steel under hot-top pulsed magneto-oscillation treatment

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Abstract

To control the distribution of nonmetallic inclusions in molten steel is of highly commercial importance. A newly developed method, hot-top pulsed magneto-oscillation (HPMO), was employed to control nonmetallic inclusions in a medium-carbon steel ingot. The experimental results present that the position of nonmetallic inclusions of spinel (Al–Mg–O) and Mn–S inclusions is significantly influenced by HPMO. The number of nonmetallic inclusions gradually increased from the lateral wall to the center of ingot along the radial direction under the impact of HPMO treatment, whereas this distribution trend cannot be observed in the reference sample without HPMO treatment. In addition, the number of inclusions along vertical direction is proportional to the height of ingot, especially for the inclusions with the size of larger than 10 μm. It indicates that the application of HPMO can push away inclusions from lateral to center, and then the expelled inclusions aggregate and rise up to the top of ingot.

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Acknowledgements

The authors acknowledge the financial supports from the National Natural Science Foundation of China (Grant Nos. U1760204 and 51504048), the National Key Research Program of China (Grant No. 2017YFB0701800) and the Science and Technology Commission of Shanghai Municipality (Grant No. 15520710800).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai, 200444, China

    Hui-cheng Li, Zhen Liu, Ren-xing Li, Zhi-shuai Xu & Qi-jie Zhai

  2. School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China

    Hui-cheng Li, Zhen Liu, Ren-xing Li, Zhi-shuai Xu & Qi-jie Zhai

  3. College of Science, Shanghai University, Shanghai, 200444, China

    Yong-yong Gong

  4. Materials Genome Institute, Shanghai University, Shanghai, 200444, China

    Qi-jie Zhai

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  1. Hui-cheng Li
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  2. Zhen Liu
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Correspondence to Hui-cheng Li or Qi-jie Zhai.

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Li, Hc., Liu, Z., Li, Rx. et al. Distribution of nonmetallic inclusions in molten steel under hot-top pulsed magneto-oscillation treatment. J. Iron Steel Res. Int. 25, 867–876 (2018). https://doi.org/10.1007/s42243-018-0112-5

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  • DOI: https://doi.org/10.1007/s42243-018-0112-5

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