Effect of Slab Reheating Temperature on Cold Rolling Texture Evolution of Nb-Containing Grain-Oriented Silicon Steel

Liguang Wang,Jinyu Liang,Yunli Feng,Shuhuan Wang,Jie Li

doi:10.3390/cryst11121478

Liguang Wang, Jinyu Liang + Show 3 more

Open Access

https://doi.org/10.3390/cryst11121478

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Journal: Crystals	Publication Date: Nov 28, 2021
Citations: 2	License type: CC BY 4.0

Affiliation: North China University of Science and Technology

Abstract

Texture control of grain-oriented silicon steel is the key factor to ensure the magnetic properties of the finished product. Nb-containing grain-oriented silicon steel with different slab reheating temperatures was hot rolled followed by single-stage or two-stage cold rolling, and the textures were also analyzed. In the single-stage cold rolling process, as the slab reheating temperature is reduced, the intensity of the rotating cube texture {100}<011> and Goss texture {011}<100> drops, and that of the {111}<112> texture increases. In the two-stage cold rolling process, with the decrease in the slab reheating temperature, the intensity of the {111}<112> texture increases from 4.958 to 6.809. At the same slab reheating temperature, the intensity of the rotating cube texture declines more significantly in the two-stage cold rolling process. Finally, two-stage cold rolling with the slab reheating temperature of 1220 °C is found to be more beneficial for the formation of a sharp Goss texture during the second recrystallization. The magnetic induction intensity B800 of the final product is 1.87 T, and the iron loss P1.7/50 is 1.36 W/kg.

Highlights

Nb-Containing Grain-OrientedGrain-oriented silicon steel, which is mainly used as the core material in electrical transformers and high-rating generators, is an indispensable and important functional material in the fields of electronics, the electric power industry, and the military industry
It is characterized by a sharp {110} preferred crystallographic orientation referred to as the Goss texture
Grain-oriented silicon steel goes through a series of special processes that are different from other steel products, which achieves the sharp Goss ({110})

Summary

Introduction

Grain-oriented silicon steel, which is mainly used as the core material in electrical transformers and high-rating generators, is an indispensable and important functional material in the fields of electronics, the electric power industry, and the military industry. It is characterized by a sharp {110} preferred crystallographic orientation referred to as the Goss texture. Strict rolling processes and inhibitors that have an excellent inhibition effect work together to control the orientation of the Goss texture [6,7,8,9]. To improve the dispersity of precipitates, the inhibitor needs to be completely dissolved in the matrix during slab heating, and the growth rate is small at the precipitation temperature [10,11,12,13]

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