Effect of Niobium on Precipitates and Texture Evolution of Fe-3% Si Grain-oriented Electrical Steel Annealed Hot Band

Ruogu Hou; Chengyi Zhu; Guangqiang Li; Bowen Zhou; Juan Jia

doi:10.2355/isijinternational.ISIJINT-2017-335

This article has now been updated. Please use the final version.

Effect of Niobium on Precipitates and Texture Evolution of Fe-3% Si Grain-oriented Electrical Steel Annealed Hot Band

Ruogu Hou, Chengyi Zhu, Guangqiang Li, Bowen Zhou, Juan Jia

Author information

Ruogu Hou
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology
Chengyi Zhu
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology
Guangqiang Li
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing
Bowen Zhou
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology
Juan Jia
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology

Keywords: grain-oriented electrical steel, niobium, precipitates, texture

JOURNAL OPEN ACCESS Advance online publication

Article ID: ISIJINT-2017-335

DOI https://doi.org/10.2355/isijinternational.ISIJINT-2017-335

The final version of this article is now available: Vol. 57 (2017), No. 12 pp. 2245-2254

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Abstract

Precipitation behavior of inhibitors, microstructure and texture evolution in annealed hot band of grain-oriented Fe-3%Si electrical steel with niobium addition were analyzed, and compared with that of common grain-oriented electrical steel. Stoichiometric ratio of C and N in Nb(C, N) was determined by their lattice parameters. Inhibitors precipitated in the hot rolled band with niobium addition are mainly Nb(C, N). Their average size was 34.1 nm and number density was 3.80×10⁷/mm², with stronger inhibition effect than inhibitors in common grain oriented electrical steel. Stoichiometric ratio of C and N in Nb(C, N) changed from Nb(C_0.85, N_0.15) to Nb(C_0.71, N_0.29) which means NbC is dominant in Nb(C, N) of current study. After niobium addition, recrystallization of annealed hot band was incomplete while more Goss texture is preserved. Addition of niobium is proved helpful to obtain precipitates with higher inhibition effect during hot rolling, instead of adopting hot band annealing.

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