退火温度对1.45%Si无取向硅钢热轧组织及织构的影响

doi:10.13251/j.issn.0254-6051.2025.02.028

金属热处理 ›› 2025, Vol. 50 ›› Issue (2): 181-186.DOI: 10.13251/j.issn.0254-6051.2025.02.028

退火温度对1.45%Si无取向硅钢热轧组织及织构的影响

玄东坡¹, 郭函¹, 徐宁¹, 董林硕¹, 张健², 李志坚³, 刘旭明¹

1.鞍钢集团北京研究院有限公司, 北京 102200;
2.鞍钢集团钢铁研究院, 辽宁鞍山 114009;
3.鞍钢股份冷轧硅钢厂, 辽宁鞍山 114009

收稿日期:2024-08-11 修回日期:2024-12-19 发布日期:2025-04-10
作者简介:玄东坡(1992—),男,工程师,主要研究方向为材料加工,E-mail:m15248149921_1@163.com

Effect of annealing temperature on hot-rolled microstructure and texture of 1.45%Si non-oriented silicon steel

Xuan Dongpo¹, Guo Han¹, Xu Ning¹, Dong Linshuo¹, Zhang Jian², Li Zhijian³, Liu Xuming¹

1. Ansteel Beijing Research Institute Co., Ltd., Beijing 102200, China;
2. Iron & Steel Research Institutes of Ansteel Group Corporation, Anshan Liaoning 114009, China;
3. Cold Rolled Silicon Steel Plant of Ansteel, Anshan Liaoning 114009, China

Received:2024-08-11 Revised:2024-12-19 Published:2025-04-10

摘要/Abstract

摘要： 以工业化生产的1.45%Si无取向硅钢热轧板为研究对象,通过研究不同退火温度对热轧板的影响,以此指导大生产热轧卷曲后的保温工艺,为其免常化生产提供理论依据。研究表明,热轧板组织沿厚度方向存在较大梯度,表层、次表层和中心层分别为等轴晶、变形晶粒与细小等轴晶和变形晶粒。随退火温度升高,热轧板的再结晶比例逐渐提升,再结晶比例由32.8%增加到96.8%,热轧组织逐渐均匀,热轧板经740 ℃×2 h退火后晶粒尺寸达到51.4 μm,热轧板中γ织构和Goss织构继续减弱,λ织构逐渐增强。在高于700 ℃保温2 h退火后即可发生完全再结晶,在实际生产中,应尽可能提高热轧卷曲温度(≥700 ℃),并快速将热轧卷存放到缓冷坑中保温,使其尽可能发生完全再结晶。最终,热轧板经冷轧和再结晶退火后得到磁性能优异的产品。

关键词: 无取向硅钢, 退火温度, 微观组织, 织构

Abstract: Effect of different annealing temperatures on the hot-rolled plate of 1.45%Si non-oriented silicon steel was studied in order to guide the heat preservation process of the hot-rolled plate and provide a theoretical basis for its non-normalizing production. The results show that the microstructure of the hot-rolled plate has a large gradient along the thickness direction, and the surface layer, the subsurface layer and the center layer are equiaxed grains, deformed grains and fine equiaxed grains and deformed grains, respectively. With the increase of annealing temperature, the recrystallization ratio of hot-rolled plate gradually increases from 32.8% to 96.8%, and the microstructure of hot-rolled plate gradually uniform, the grain size of hot-rolled plate reaches 51.4 μm after annealing at 740 ℃ for 2 h, the γ texture and Goss texture in hot-rolled plate continue to decrease, and the λ texture gradually increases. Complete recrystallization can occur after annealing at a temperature higher than 740 ℃ for 2 h. In actual production, the hot-rolled coil crimp temperature (≥700 ℃) should be increased as much as possible, and the hot-rolled coil should be quickly stored in the slow cooling pit for insulation, so that complete recrystallization can occur as much as possible. Finally, after cold rolling and recrystallization annealing, the final product has excellent magnetic properties.

Key words: non-oriented silicon steel, annealing temperature, microstructure, texture

中图分类号:

TM275

玄东坡, 郭函, 徐宁, 董林硕, 张健, 李志坚, 刘旭明. 退火温度对1.45%Si无取向硅钢热轧组织及织构的影响[J]. 金属热处理, 2025, 50(2): 181-186.

Xuan Dongpo, Guo Han, Xu Ning, Dong Linshuo, Zhang Jian, Li Zhijian, Liu Xuming. Effect of annealing temperature on hot-rolled microstructure and texture of 1.45%Si non-oriented silicon steel[J]. Heat Treatment of Metals, 2025, 50(2): 181-186.

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退火温度对1.45%Si无取向硅钢热轧组织及织构的影响

Effect of annealing temperature on hot-rolled microstructure and texture of 1.45%Si non-oriented silicon steel

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