Regular Article

Effect of magneto-thermal coupling treatment on microstructure and texture of CGO steel

¹ School of Material and Metallurgy (Rare Earth Institute), Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China
² Technology Center of Inner Mongolia Baogang Steel Union Co., Ltd., Baotou Inner Mongolia 014010, China
³ Baotou Weifeng Rare Earth Electromagnetic Materials Co Ltd., Baotou Inner Mongolia 014010, China

^* e-mail: donglilibest@126.com
^** e-mail: malin@imust.cn

Received: 23 March 2022
Accepted: 30 September 2022

Abstract

The research object of this paper is the common oriented silicon steel (CGO) with Si content of 3.1%. The magneto-thermal coupling processing device independently developed was used to conduct laboratory studies on magneto-thermal coupling decarburization annealing, magneto-thermal coupling high temperature pre-annealing and magneto-thermal coupling tensile leveling annealing. The microstructure and macroscopic texture of CGO steel after magneto-thermal coupling treatment were measured by Zeiss microscope and X-ray diffrotometer, and compared with the samples after conventional annealing process. The results show that the magneto-thermal coupling treatment at the decarburization annealing stage can promote the distribution of ferritic grains along the magnetic field direction. The cubic texture {001}<100> with high level fault energy and {111}＜112＞ texture also increases. In the high temperature pretreatment stage, the increase of {111}＜112＞ texture is more obvious after magnetic-thermal coupling treatment. The deviation angle of goss-oriented grain decreases after magneto-thermal coupling treatment in tensile leveling stage. The magneto-thermal coupling effect plays a positive role in the microstructure and texture of CGO steel during decarburization annealing, high temperature pre-annealing and tensile leveling annealing.