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<p>This paper systematically investigates the influence of cross-rolling on the microstructure, texture evolution, and magnetic properties of 6.5 wt.%Si non-oriented silicon steel using a multi-stage annealing combined with cross-rolling process route. The results show that texture inhomogeneity in hot-rolled sheets is more difficult to eliminate than microstructure inhomogeneity. During the rolling process, grains with specific orientations (65° ≤ <i>φ</i><sub>1</sub> ≤ 78.5°, 19.5° ≤ <i>Φ</i> ≤ 41.5°, <i>φ</i><sub>2</sub> = 45°) form deformation band structures. After detaching from their initial orientation, these deformation bands rotate toward the λ-fiber and <i>γ</i>-fiber. Shear bands were observed in all rolled microstructures, exhibiting strong crystallographic or non-crystallographic characteristics. Crystallographic shear bands appear within all grains and are driven by dislocation slip, while non-crystallographic shear bands appear within grains oriented along and near the γ-fiber ({111}&lt;112&gt;, {111}&lt;110&gt;, {112}&lt;351&gt;), driven by strain incompatibility between layered grains. Compared to conventional rolling, cross-rolling can enhance the λ-fiber texture in the final sheet and increase the grain size. Texture and grain size, respectively, dominate the magnetic induction and core loss of the final sheet.</p>

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Influence of Cross-Rolling on the Microstructure, Texture, and Magnetic Properties of 6.5 wt.%Si Non-oriented Silicon Steel

  • 期刊论文

  • 发表日期：

    2025年12月24日

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  • Yunpeng Guan,
  • Zhichao Li,
  • Yutang Wang,
  • Shihao Wang,
  • Pei Zou

摘要

This paper systematically investigates the influence of cross-rolling on the microstructure, texture evolution, and magnetic properties of 6.5 wt.%Si non-oriented silicon steel using a multi-stage annealing combined with cross-rolling process route. The results show that texture inhomogeneity in hot-rolled sheets is more difficult to eliminate than microstructure inhomogeneity. During the rolling process, grains with specific orientations (65° ≤ φ1 ≤ 78.5°, 19.5° ≤ Φ ≤ 41.5°, φ2 = 45°) form deformation band structures. After detaching from their initial orientation, these deformation bands rotate toward the λ-fiber and γ-fiber. Shear bands were observed in all rolled microstructures, exhibiting strong crystallographic or non-crystallographic characteristics. Crystallographic shear bands appear within all grains and are driven by dislocation slip, while non-crystallographic shear bands appear within grains oriented along and near the γ-fiber ({111}<112>, {111}<110>, {112}<351>), driven by strain incompatibility between layered grains. Compared to conventional rolling, cross-rolling can enhance the λ-fiber texture in the final sheet and increase the grain size. Texture and grain size, respectively, dominate the magnetic induction and core loss of the final sheet.