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Precipitation Behavior of AlN in High-Magnetic-Induction Grain-Oriented Silicon Steel Slab

  • Advances in Processing, Manufacturing, and Applications of Magnetic Materials
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Abstract

The magnetic properties of high-magnetic-induction grain-oriented silicon steel are strongly related to the precipitation and dissolution of the AlN inhibitor. The three-dimensional morphology, size, quantity, and microstructure of AlN in oriented silicon steel slabs have been investigated by an electrolytic method, automated analysis technology for inclusions, and transmission electron microscopy. The AlN particles presented plate-like and rectangular blocks, precipitating more easily in the center of the slab. The morphology of AlN is determined by its hexagonal crystal system structure and growth rate in (210), (001), and (110) planes during solidification of the slab. Complete dissolution of AlN particles approaching 10 μm is difficult to achieve on thermal processing at 1423 K. Special attention should be paid to control of the precipitation size of AlN during solidification to improve the slab reheating process.

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Acknowledgements

The authors are grateful for support from the National Science Foundation China (Grant No. 51774031), Open Project of State Key Laboratory of Advanced Special Steel, Shanghai University (SKLASS 2017-12), China, and Shougang Qian’an Iron & Steel Company.

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Authors and Affiliations

  1. State Key Lab of Advanced Metallurgy, University of Science & Technology Beijing, Beijing, 100083, China

    Xin Li, Min Wang & YanPing Bao

  2. Shougang Qian’an Iron & Steel Company, Qian’an, 064404, Hebei, China

    Jian Gong, Xianhui Wang & Weiguang Pang

Authors
  1. Xin Li
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  2. Min Wang
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  3. YanPing Bao
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  4. Jian Gong
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Correspondence to Min Wang.

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Li, X., Wang, M., Bao, Y. et al. Precipitation Behavior of AlN in High-Magnetic-Induction Grain-Oriented Silicon Steel Slab. JOM 71, 3135–3141 (2019). https://doi.org/10.1007/s11837-019-03623-4

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  • DOI: https://doi.org/10.1007/s11837-019-03623-4

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