{411}<148> Texture in Thin-Gauge Grain-Oriented Silicon Steel |
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Authors: | Cheng-Xu He Fu-Yao Yang Guang Ma Xin Chen Li Meng |
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Affiliation: | 1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China2 Department of Electrical Engineering New Materials and Microelectronics, State Grid Smart Grid Research Institute,Beijing 102211, China3 Beijing R&D Department, East China Branch of Central Iron and Steel Research Institute, Beijing 100081, China |
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Abstract: | The significant occupancy of {411}<148> texture exists in the thin-gauge grain-oriented silicon steel (TG-CRGO is defined that thickness of the sheet is <0.25 mm and the reduction in cold rolling is more than 90%) which has been considered to have obviously effects on the abnormal growth of Goss-oriented grains during the secondary recrystallization process. The microstructures of the TG-CRGO were investigated by X-ray diffraction and electron back-scattered diffraction in this study. It was found that {411}<148> texture mainly exists in the center layer of hot-rolled as well as normalized plates. With the increase in cold rolling reduction, {411}<148> orientation gradually rotates to α-fiber texture (<110>//RD). Finally, few {411}<148> would retain at the boundaries of deformed α-fiber grains (<110>//RD) as the reduction in cold rolling reaches 90%. After annealing treatment, a small amount of γ-fiber textures (<111>//ND) preferably nucleates and recrystallizes between the DBs (deformation bands) at first; then, the {411}<148> recrystallization texture occurs and mainly nucleates at the grains boundaries of the deformed α-fiber grains, and also quite a few {411}<148> orientation grains nucleate in the inner of {112}<110> grains. But this phenomenon was not observed in the {100}<011> deformation grains. With respect to the occurrence of {411}<148> recrystallization texture, it is mainly induced by strong α-fiber as well as weak γ-fiber textures formed during cold rolling other than originating from {411}<148> regions in hot bands. |
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Keywords: | Thin-gauge grain-oriented silicon steel (TG-CRGO) {411}<148> texture α-Fiber texture Recrystallization Electron back-scattered diffraction (EBSD) |
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