锻压技术

轧制裂纹及热处理工艺对高硅电工钢复合板磁性能的影响

英文标题：Influence of rolling crack and heat treatment process on magnetic property for high silicon electrical steel composite plate

作者：姬帅刘忠军

单位：西安石油大学南京工业大学

关键词：高硅电工钢复合板热轧温轧扩散退火裂纹磁性能

分类号：G142.7

出版年,卷(期):页码：2022,47(2):131-138

摘要：

对3层高硅电工钢复合板铸坯进行热轧及温轧变形加工后，采用正火、退火两种热处理方式处理，并观察轧制过程中产生的裂纹，研究不同状态下复合板的磁性能。对不同状态下的试样进行扩散退火处理，研究复合板中裂纹变化及其对磁性能的影响。结果表明：不同热处理工艺下合金内部的裂纹尺寸差异明显，裂纹尺寸对复合板的磁性能影响显著，相对于深裂纹，其他因素的影响较小；温轧变形加工后，复合板内层出现有序组织，但该有序组织在合金存在深裂纹的前提下并不能从本质上提高合金的磁性能；扩散退火工艺可以消除复合板内部的浅裂纹及微裂纹，但不能消除尺寸较大的裂纹，故而不能显著提高存在深裂纹的复合板的磁性能。

After hot rolling and warm rolling deformation processing of casting billet for three-layer high silicon electrical steel composite plate, it was normalized and annealed for heat treatment. Then, the cracks produced during the rolling process were observed, and the magnetic properties of composite plate in different states were also investigated. Furthermore, the samples in different states were subjected to diffusion annealing treatment, and the changes of crack in composite plate and their effects on magnetic property were studied. The results show that the crack sizes inside alloy are obviously different under different heat treatment processes, which has a great influence on the magnetic property of composite plate, and other factors have a small influence compared with the deep crack. In addition, after the warm rolling deformation processing of composite plate, an ordered structure appears in the inner layer which cannot substantially improve the magnetic property of alloy under the premise of deep crack. Finally, the diffusion annealing process can eliminate shallow crack and micro crack inside the composite plate, but it cannot eliminate the larger crack. Thus, the magnetic property of composite plate with deep crack cannot be significantly improved.

基金项目：

陕西省自然科学基础研究计划面上项目（2021JM-410）；西安石油大学校青年创新团队基金（2019QNKYCXTD12）

作者简介：姬帅（1985-），男，博士，副教授,E-mail：jishuai029@xsyu.edu.cn

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