Abstract
Effects of Sn on microstructure, texture and magnetic properties of 2.7%Si-0.5%Al non-oriented silicon steel in industrial production were studied by X-ray diffraction and electron backscattering diffraction. Furthermore, combining first-principles simulation with White–Coghlan model calculation, grain boundary segregation of Sn was also investigated. In Sn-0.05 steel, cold-rolled sheet showed more ingrain shear bands and intensity of textures weakened significantly. Addition of Sn obviously reduced intensity of {111}<112> and increased intensity of {114}<481>; strong {100}<120> and nearly Goss textures appeared in annealed sheet. P1.5/50 decreased by 0.05W/kg, B50 increased by 0.005 T, and stability of magnetic properties were obviously improved of Sn-0.05. In the unit grain boundary layer (1 Å−2), the excess solute concentration on the grain boundary layer of Sn corresponding to 20,000–30,000 appm was 0.16–0.22 and gradually decreased with temperature and increased with intragranular solute content. As a segregation element, during annealing process of hot-rolled band and cold-rolled sheet, Sn exerted a drag force on the grain boundaries, thus inhibiting the grain growth. {114}<481> and {100}<120> oriented grains could grow selectively and distribute evenly by virtue of their mobility and quantity advantage higher than {111}<112>, thus improving magnetic properties and stability of 2.7%Si-0.5%Al non-oriented silicon steel.
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Funding
The authors acknowledge the support from the National Natural Science Foundation of China (NSFC) (no. 52374316), the Fund of Education Department of Anhui Province (no. 2022AH050291), the Open Project Program of Anhui Province Key Laboratory of Metallurgical Engineering & Resources Re-cycling (Anhui University of Technology) (no. SKF21-04) and the Jiangxi Province Major Scientific and Technological Research and Development Special Funding Project (20213AAE01009).
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Wang, Hj., Shao, Kx., Qiao, Jl. et al. Influence Mechanism of Sn on 2.7%Si-0.5%Al Non-oriented Silicon Steel. JOM (2024). https://doi.org/10.1007/s11837-024-06549-8
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DOI: https://doi.org/10.1007/s11837-024-06549-8