二次冷轧制备Fe-3.5%Si无取向硅钢组织织变研究

王伊南; 鲁辉虎; 林媛; 顾祥宇; 乔卫东; 杨胜超; 祁成哲; 李泽阳

doi:10.3969/j.issn.1674-6457.2025.07.012

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精密成形工程 ›› 2025, Vol. 17 ›› Issue (7) : 102-109. DOI: 10.3969/j.issn.1674-6457.2025.07.012

钢铁成形

二次冷轧制备Fe-3.5%Si无取向硅钢组织织变研究

王伊南¹, 鲁辉虎^1,*, 林媛², 顾祥宇², 乔卫东¹, 杨胜超¹, 祁成哲¹, 李泽阳¹

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Microstructure Evolution of Fe-3.5%Si Non-oriented Silicon Steel Prepared by Double Cold Rolling

WANG Yi'nan¹, LU Huihu^1,*, LIN Yuan², GU Xiangyu², QIAO Weidong¹, YANG Shengchao¹, QI Chengzhe¹, LI Zeyang¹

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摘要

目的以3.5%（质量分数）Si无取向硅钢热轧板为对象,研究采用二次冷轧法制备0.25 mm厚无取向硅钢过程中微观组织与织构的演变规律。方法通过冷轧与热处理实验、EBSD及室温拉伸实验,研究了制备过程中无取向硅钢的微观组织织构及性能。结果热轧板表层发生部分再结晶,由剪切带、回复组织与细小等轴晶组成,中心层存在大量剪切带与变形带;表层以Goss织构为主,中心层由锋锐α纤维织构组成。经950 ℃×3 min常化后发生完全再结晶,平均晶粒尺寸为(147.6±1.9) μm;α纤维织构转变为α*纤维织构。一次冷轧板中存在完整α纤维织构与γ纤维织构,经950 ℃×3 min中间退火后发生完全再结晶,平均晶粒尺寸为(119.3±6.9) μm。二次冷轧板中为锋锐$\{001\}\langle 1 \overline{1} 0\rangle$织构与γ纤维织构。经960 ℃×3 min再结晶退火后,平均晶粒尺寸为(145.4±4.4) μm,织构组分主要为立方、旋转立方与Goss织构,退火后试样屈服强度为515.6 MPa,断后伸长率为11.6%。结论通过二次冷轧法获得了高强无取向硅钢,其中屈服强度强化机制以固溶强化为主,贡献值为357.63 MPa,占比67.63%;最终退火试样磁感值B₅₀₀₀为1.690 T;铁损值P_1.0/400为13.37 W/kg。

Abstract

The work aims to take the 3.5wt.% Si non-oriented silicon steel as the research object and investigate the evolution of microstructure and texture of the 0.25 mm thick non-oriented silicon steel by double cold rolling. The microstructure and properties of the non-oriented silicon steel during preparation were studied through cold rolling, heat treatment, EBSD and tensile test at room temperature. The surface layer of the hot rolled plate was partially recrystallized and consisted of shear bands, recovery structures and fine equiaxed crystals, and there were a lot of shear bands and deformation bands in the center layer. The surface layer was mainly composed of Goss texture, and the central layer was composed of Fan-sharp α fiber texture. Complete recrystallization occurred after normalization at 950 ℃×3 min, and the average grain size was (147.6±1.9) μm. α fiber texture was transformed into α* fiber texture. The α-fiber texture and γ-fiber texture of the first cold rolled plate were completely recrystallized after annealing at 950 ℃×3 min. The average grain size was (119.3±6.9) μm. In the secondary cold rolled plate, there were sharp $\{001\}\langle 1 \overline{1} 0\rangle$ texture and γ-fiber texture. After recrystallization and annealing at 960 ℃×3 min, the average grain size was (145.4±4.4) μm. The texture groups were divided into cubic, rotating cubic and Goss textures. The yield strength and elongation after annealing were 515.6 MPa and 11.6%. The high-strength non-oriented silicon steel was obtained by double cold rolling. The strengthening mechanism of yield strength is mainly solid solution strengthening, and the contribution value is 357.63 MPa, accounting for 67.63%. The magnetic inductance B₅₀₀₀ of the final annealed sample is 1.690 T and the iron loss P_1.0/400 is 13.37 W/kg.

导出引用

王伊南, 鲁辉虎, 林媛, 顾祥宇, 乔卫东, 杨胜超, 祁成哲, 李泽阳. 二次冷轧制备Fe-3.5%Si无取向硅钢组织织变研究[J]. 精密成形工程. 2025, 17(7): 102-109 https://doi.org/10.3969/j.issn.1674-6457.2025.07.012

WANG Yi'nan, LU Huihu, LIN Yuan, GU Xiangyu, QIAO Weidong, YANG Shengchao, QI Chengzhe, LI Zeyang. Microstructure Evolution of Fe-3.5%Si Non-oriented Silicon Steel Prepared by Double Cold Rolling[J]. Journal of Netshape Forming Engineering. 2025, 17(7): 102-109 https://doi.org/10.3969/j.issn.1674-6457.2025.07.012

中图分类号： TG142.1

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