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Distribution of nonmetallic inclusions in molten steel under hot-top pulsed magneto-oscillation treatment |
Hui-cheng Li1,2 Zhen Liu1,2 Ren-xing Li1,2 Yong-yong Gong3 Zhi-shuai Xu1,2 Qi-jie Zhai1,2,4 |
1 State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200444, China 2 School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China 3 College of Science, Shanghai University, Shanghai 200444, China 4 Materials Genome Institute, Shanghai University, Shanghai 200444, China |
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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 lm. 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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Received: 12 September 2017
Published: 31 October 2018
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Cite this article: |
LI Hui-Cheng,LIU Shen,LI Ren-Xin, et al. Distribution of nonmetallic inclusions in molten steel under hot-top pulsed magneto-oscillation treatment[J]. Journal of Iron and Steel Research International, 2018, 25(8): 867-876.
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