, Volume 71, Issue 9, pp 3135–3141 | Cite as

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

  • Xin Li
  • Min WangEmail author
  • YanPing Bao
  • Jian Gong
  • Xianhui Wang
  • Weiguang Pang
Advances in Processing, Manufacturing, and Applications of Magnetic Materials


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.



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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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Xin Li
    • 1
  • Min Wang
    • 1
    Email author
  • YanPing Bao
    • 1
  • Jian Gong
    • 2
  • Xianhui Wang
    • 2
  • Weiguang Pang
    • 2
  1. 1.State Key Lab of Advanced MetallurgyUniversity of Science & Technology BeijingBeijingChina
  2. 2.Shougang Qian’an Iron & Steel CompanyQian’anChina

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