常化工艺对W470无取向硅钢组织和织构的影响
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国家自然科学基金(52204341,52174311);中国博士后科学基金(2023M740415);河北省自然科学基金(E2024208002)


Effect of normalization process on microstructure and texture of W470 non-oriented silicon steel
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    摘要:

    为了解决无结晶器电磁搅拌条件下生产的W470无取向硅钢热轧板存在大量变形组织和不利织构的问题,利用电子背散射衍射仪(electron backscattered diffraction,EBSD)研究了常化工艺参数对W470再结晶行为、晶粒尺寸和织构的影响规律。结果表明:W470热轧板中心层存在大量的非再结晶组织,对于不同常化温度,从840 ℃升高至960 ℃,中心层再结晶率逐渐升高,930 ℃常化后发生完全再结晶;对于不同常化保温时间,在900 ℃条件下随着保温时间从1 min延长至9 min,中心层逐渐发生完全再结晶(保温7 min后已发生完全再结晶);常化板表层由{110}〈110〉和{114}〈110〉织构组成,中心层为γ纤维织构、铜型织构和旋转立方织构;随着常化温度提高和保温时间延长,再结晶率提高,对磁性能不利的γ织构强度减弱。研究结果揭示了在缺乏连铸结晶器电磁搅拌的条件下常化温度与保温时间对W470无取向硅钢组织与织构的协同作用规律,为获得良好的微观组织与织构提供了一定参考。

    Abstract:

    To address the issue of significant deformed microstructures and undesirable textures in as-hot-rolled W470 non-oriented silicon steel sheets produced without mold electromagnetic stirring, electron backscattered diffraction(EBSD) was employed to systematically investigate the effects of normalization process parameters on the recrystallization behavior, grain size, and texture evolution. The results reveal that the center layer of the W470 as-hot-rolled sheet retains a substantial fraction of non-recrystallized microstructure. For different normalizing temperatures, the recrystallization fraction in the center layer increases progressively with rising normalization temperature from 840 ℃ to 960 ℃, achieving completeness at 930 ℃. For different normalizing temperatures, at a constant temperature of 900 ℃, extending the holding time from 1 to 9 min leads to gradual recrystallization, with full recrystallization attained after 7 min. The normalized sheets exhibit a surface layer dominated by {110}〈110〉 and {114}〈110〉 textures. In contrast, the center layer is characterized by a combination of γ-fiber texture, copper texture ({112 }〈 111〉), and rotated cube texture. Both increasing the normalization temperature and prolonging the holding time enhance the recrystallization fraction and concurrently weaken the intensity of the magnetically unfavorable γ-fiber texture. This work elucidates the synergistic influence of normalization temperature and holding time on the microstructure and texture development of W470 non-oriented silicon steel produced under conditions of lacking mold electromagnetic stirring, which provides some reference for achieving optimized microstructures and textures.

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郑亚旭,王 坤,高 晗,张觉灵,李永亮,吕皓杰,牛崇宇.常化工艺对W470无取向硅钢组织和织构的影响[J].河北科技大学学报,2026,47(1):1-11

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  • 收稿日期:2025-06-16
  • 最后修改日期:2025-11-25
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  • 在线发布日期: 2026-02-09
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