金属热处理 ›› 2025, Vol. 50 ›› Issue (9): 208-213.DOI: 10.13251/j.issn.0254-6051.2025.09.033

• 工艺研究 • 上一篇    下一篇

人工时效对超高强度无取向硅钢组织与性能的影响

裴润奇1, 姜世勇2, 陈祥2, 魏辉1   

  1. 1.山西太钢不锈钢股份有限公司 硅钢事业部, 山西 太原 030003;
    2.山西太钢不锈钢股份有限公司 技术中心, 山西 太原 030003
  • 收稿日期:2025-03-24 修回日期:2025-07-03 出版日期:2025-09-25 发布日期:2025-10-13
  • 作者简介:裴润奇(1976—),男,高级工程师,硕士,主要研究方向为大型水电用超高牌号无取向硅钢,E-mail: peirunqi2024@163.com。

Effect of artificial aging on microstructure and properties of ultra-high strength non-oriented silicon steel

Pei Runqi1, Jiang Shiyong2, Chen Xiang2, Wei Hui1   

  1. 1. Silicon Steel Business Division, Shanxi Taigang Stainless Steel Co., Ltd., Taiyuan Shanxi 030003, China;
    2. Technical Center, Shanxi Taigang Stainless Steel Co., Ltd., Taiyuan Shanxi 030003, China
  • Received:2025-03-24 Revised:2025-07-03 Online:2025-09-25 Published:2025-10-13

摘要: 为探究超高强度无取向硅钢产品在发电机运转过程中的时效现象,以供货态(退火态)成品板为对比基准,研究了150 ℃×100 h和225 ℃×24 h两种人工时效工艺对3.52%Si-1.10%Al超高强度无取向硅钢再结晶组织、织构、磁性能及力学性能的影响。结果表明,两种时效工艺下无取向硅钢成品板的显微组织仍然由沿轧制方向伸长的粗大条带状形变组织和不均匀分布的细小再结晶晶粒所组成,与未时效成品板的组织没有明显差别。未时效成品板的织构主要为α纤维织构,其次为少量的γ纤维织构和高斯织构。时效后成品板的织构组分和强度与未时效成品板非常相似,没有发生明显变化。时效使磁性能有所恶化,铁损劣化率不到1%,磁极化强度劣化率不到0.5%,对用户使用基本无影响。时效对试验钢力学性能的影响不大,屈服强度、抗拉强度略有降低,断后伸长率及硬度变化不大。225 ℃×24 h时效试样的力学性能变化幅度略大于150 ℃×100 h时效试样。

关键词: 超高强度无取向硅钢, 人工时效, 组织, 性能

Abstract: To investigate the aging phenomenon of ultra-high strength non-oriented silicon steel products during generator operation, take the as-supplied state(annealed) as the comparison benchmark, the effect of two artificial aging processes, at 150 ℃ for 100 h and at 225 ℃ for 24 h, on the recrystallization microstructure, texture, magnetic properties and mechanical properties of the 3.52%Si-1.10%Al ultra-high strength non-oriented silicon steel was studied. The results show that the microstructure of the non-oriented silicon steel finished sheet under both aging processes is still composed of coarse strip-shaped deformation structures elongated along the rolling direction and non-uniformly distributed fine recrystallized grains, and there is no significant difference from the original microstructure of the unaged finished sheet. The texture of the unaged finished sheet is mainly α-fiber texture, followed by minor γ-fiber and Goss texture. Aging treatments exert negligible influence on texture evolution, with both the type and intensity of texture components remaining largely unchanged. Magnetic properties are slightly deteriorated after aging, the increase in core loss remains below 1%, and the reduction in magnetic polarization is less than 0.5%, suggesting minimal impact on end-use performance. The aging treatments exert minimal influence on the mechanical properties of the tested steel. Both yield strength and tensile strength exhibit slight reductions, whereas elongation after fracture and hardness remain nearly unchanged. Specimens aged at 225 ℃ for 24 h exhibit slightly more pronounced changes in mechanical properties compared to those aged at 150 ℃ for 100 h.

Key words: ultra-high strength non-oriented silicon steel, artificial aging, microstructure, properties

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