无取向硅钢冲裁过程中的组织和织构演变

方祥; 王玮; François Brisset; Anne-Laure Helbert; Thierry Baudin

doi:10.1007/s12613-021-2404-1

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(11): 2064-2071

Xiang Fang, Wei Wang, François Brisset, Anne-Laure Helbert, and Thierry Baudin, Microstructure and texture evolution of nonoriented silicon steel during the punching process, Int. J. Miner. Metall. Mater., 29(2022), No. 11, pp. 2064-2071. https://doi.org/10.1007/s12613-021-2404-1

Cite this article as:

Xiang Fang, Wei Wang, François Brisset, Anne-Laure Helbert, and Thierry Baudin, Microstructure and texture evolution of nonoriented silicon steel during the punching process, Int. J. Miner. Metall. Mater., 29(2022), No. 11, pp. 2064-2071. https://doi.org/10.1007/s12613-021-2404-1

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研究论文

无取向硅钢冲裁过程中的组织和织构演变

1)
武汉理工大学汽车工程学院，武汉 430070，中国
2)
武汉理工大学现代汽车零部件技术湖北省重点实验室，武汉 430070，中国
3)
武汉理工大学汽车零部件技术湖北省协同创新中心，武汉 430070，中国
4)
武汉理工大学新能源与智能网联车湖北省工程技术研究中心，武汉 430070，中国
5)
Institut de Chimie Moléculaire et des Matériaux d’Orsay, Université Paris-Saclay, CNRS, 91405 Orsay, France

通讯作者:
王玮 E-mail: wei.wang@whut.edu.cn

文章亮点

(1) 详细研究了无取向硅钢冲裁边缘的形变机制及组织演变。

(2) 系统地研究了无取向硅钢冲裁边缘的织构演变及分布。

(3) 明确了无取向硅钢冲裁边缘的形变机制对其织构演变的影响规律。

中文摘要

无取向硅钢是电机铁芯所需要的重要软磁材料。目前，生产过程中主要借助冲裁工艺制备电机铁芯的叠片。冲裁工艺会使得无取向硅钢的切割边缘产生形变，从而导致其织构发生演变，进而影响叠片的磁性能。本文旨在研究无取向硅钢冲裁边缘的塑性形变机制，组织及织构演变机理。为了方便研究，本文首先借助钝化模具制备了在冲裁边缘具备较宽变形区域的圆形样品。随后，沿板材轧制方向和横向在圆形样品的冲裁边缘分别选取了一个观测点，并借助电子背散射技术（EBSD）分析了两个观测点的形变机制，组织和织构演变。研究表明两个观测点的形变机制和组织演变相似。由于形变机制相同，样品冲裁边缘两个观测点的织构演变规律也相似。钝化模具使得样品冲裁边缘明显的分为无弯曲，连续弯曲和整体弯曲三个区域。无弯曲和连续弯曲区域的主要形变机制是位错滑移，这一机制促进了{221}纤维织构的形成。整体弯曲区域主要处于冲裁边缘的端部，该区域的形变机制包括位错滑移和微观剪切带的形成，其中微观剪切带的形成导致该区域的织构由原始{111}纤维织构发生向{110}纤维织构的转变。

关键词:

组织;
织构;
无取向硅钢;
冲裁

Research Article

Microstructure and texture evolution of nonoriented silicon steel during the punching process

+ Author Affiliations

1)
School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, China
2)
Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China
3)
Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, China
4)
Hubei Research Center for New Energy & Intelligent Connected Vehicle, Wuhan University of Technology, Wuhan 430070, China
5)
Institut de Chimie Moléculaire et des Matériaux d’Orsay, Université Paris-Saclay, CNRS, 91405 Orsay, France

Corresponding author:
Wei Wang E-mail: wei.wang@whut.edu.cn
Received: 13 September 2021; Revised: 26 November 2021; Accepted: 27 December 2021; Available online: 28 December 2021

Abstract

Abstract

The iron core of a motor is mainly manufactured from rolled nonoriented silicon steel using a punching process that leads to deformation and texture evolution at the cutting edge. According to this process, circular samples of nonoriented silicon steel were prepared by punching using blunt punch tools. In this work, two positions along the rolling and transverse directions at the cutting edge were analyzed. The main mechanisms of deformation for both positions are dislocation slip and formation of shear bands. These two mechanisms lead to similar texture evolutions for both positions. The dislocation slip leads to the formation of the $ \left\{221\right\}\left\langle{uvw}\right\rangle $ component in the unbending area (200 µm away from the cutting edge) and intermediate continuum-bent area. Additionally, the evolution of the texture from the $ \left\{111\right\} $ γ fiber to the $ \left\{110\right\} $ fiber was observed at the extremity of the cutting edge with the formation of shear bands.
- microstructure;
- texture;
- nonoriented silicon steel;
- punching

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