Influence of Nb Content on Precipitation,Grain Microstructure,Texture and Magnetic Properties of Grain-Oriented Silicon Steel |
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| Authors: | Yong Wang Chengyi Zhu Guangqiang Li Yulong Liu Yu Liu |
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| Affiliation: | 1.State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; (Y.W.); (C.Z.); (Y.L.); (Y.L.);2.Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;3.Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, China |
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| Abstract: | The effects of Nb content on precipitation, microstructure, texture and magnetic properties of primary recrystallized grain-oriented silicon steel were investigated by various methods. The results show that the precipitates in primary recrystallized sheets are mainly MnS, Nb(C,N), composite precipitates of MnS and AlN, and composite precipitates of Nb(C,N) and AlN. Adding niobium could refine the primary recrystallized microstructure. The steel with 0.009 wt% Nb possesses the finest and the most dispersed precipitates, which contributes to the finest primary recrystallized microstructure due to the strong pinning force. Adding niobium is beneficial to obtain large volume fraction favorable texture for grain-oriented silicon steel, and the effect of Nb addition is not obvious when the content is higher than 0.009 wt%. After final annealing, the steel with 0.009 wt% Nb shows the best magnetic properties, B800 = 1.872 T, P1.7/50 = 1.25 W/kg. |
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| Keywords: | niobium grain-oriented silicon steel precipitates microstructure texture magnetic properties |
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