Effect of pre-recovery annealing on recrystallisation behaviour of strip-cast non-oriented electrical steel

Abstract

In order to improve the {100} recrystallisation texture of non-oriented electrical steel, a pre-recovery annealing process was proposed to regulate recrystallisation behaviour of {100} grains by altering the structure and stored energy of deformed microstructure. Pre-annealing was conducted at 500°C for 0–90 min. The microstructural and textural evolution was carried out by optical microscopy, electron backscattered diffraction and X-ray diffraction analysis. The results indicate that the pre-recovery annealing promotes the formation of large {100} recrystallised grains. With the prolongation of pre-annealing time, the {100} recrystallisation texture expands from Cube to the vicinity of {001}<130>-{001}<110>, and the volume fraction gradually increases. In addition, the changes of recrystallised microstructure are discussed on the basis of strain-induced boundary migration.

KEYWORDS:

• Non-oriented electrical steel
• pre-recovery annealing
• recrystallisation behaviour
• {100} texture

Data availability statement

All data are available from the corresponding authors on reasonable request.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by National Natural Science Foundation of China [grant number 52205356, 51965022]; the Open Project of Key Laboratory of Conveyance and Equipment, the Ministry of Education [grant number KLCE2021-07]; Project funded by China Postdoctoral Science Foundation [grant number 2022M721423]; Natural Science Foundation of Jiangxi Province [grant number 20224BAB214048, 20202BABL204046]; the Science and Technology Research Project of Jiangxi Provincial Department of Education [grant number GJJ210653, GJJ200606].