Role of Hot Rolling in Microstructure and Texture Development of Strip Cast Non-Oriented Electrical Steel
Haitao Jiao,
Xinxiang Xie,
Xinyi Hu,
Longzhi Zhao,
Raja Devesh Kuma Misra,
Dejia Liu,
Yanchuan Tang,
Yong Hu
Affiliations
Haitao Jiao
Key Laboratory of Conveyance and Equipment, East China Jiaotong University, Ministry of Education, Nanchang 330013, China
Xinxiang Xie
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China
Xinyi Hu
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China
Longzhi Zhao
Key Laboratory of Conveyance and Equipment, East China Jiaotong University, Ministry of Education, Nanchang 330013, China
Raja Devesh Kuma Misra
Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials, and Biomedical Engineering, University of Texas, El Paso, TX 79968, USA
Dejia Liu
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China
Yanchuan Tang
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China
Yong Hu
School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, China
In this study, the effect of the hot-cold rolling process on the evolution of the microstructure, texture and magnetic properties of strip-cast non-oriented electrical steel was investigated by introducing hot rolling with different reductions. The results indicate that hot rolling with an appropriate reduction, such as the 20% used in this study, increases the shear bands and {100} deformed microstructure in the cold roll sheet. As a result, in our study, enhanced η and Cube recrystallization texture and the improved magnetic induction were obtained. However, hot rolling with excessive reduction (36–52%) decreased the shear bands and increased the α-oriented deformation microstructure with low stored energy. It enhanced the α recrystallization texture and weakened the η texture, resulting in a decrease in the magnetic induction. In addition, hot rolling promoted the precipitation of supersaturated solid solution elements in the as-cast strip, thereby affecting the subsequent microstructure evolution and the optimization of its magnetic properties.
