Evolution of Texture and Development of Goss Grains in High Permeability Grain Oriented Silicon Steel Produced by TSCR Process
FU Bing1, XIANG Li2,*, QIAO Jialong2, LIU Jing1, QIU Shengtao2
1 State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China 2 National Engineering Research Center of Continuous Casting Technology, China Iron and Steel Research Institute Group, Beijing 100081, China
Abstract: Based on low-temperature high permeability grain-oriented silicon steel produced by thin slab casting and rolling process with simultaneous decarburization and nitriding, the evolution characteristics of the main texture components and their area fractions and distribution were studied by means of EBSD and XRD. The development of Goss grains with relatively accurate orientation along the processing route was also investigated. It is found that the texture components of hot-rolled band and normalized band are mainly α fiber textures from {001}〈110〉 to {112}〈110〉, and the texture distribution is inhomogeneous along the thickness direction. Moreover, the Goss grains within 5° misorientation against the stan-dard {110}〈001〉 are basically located at 1/10—1/4 of the entire band thickness, and the area fraction is only about 0.1%. The texture components of cold-rolled sheet are still mainly α fiber textures from {001}〈110〉 to {223}〈110〉, but the intensities are enhanced significantly. After simutaneous decarburization and nitriding treatment at 835 ℃, the intensities and area fractions of {001}〈120〉, {114}〈481〉 and {110}〈001〉 textures in the nitrided sheet are increased obviously, while the α fiber textures are the opposite. However, the distribution position and area fraction of the Goss grains within 5° misorientation are basically unchanged. Furthermore, compared with other specified orientation grains within 10° misorientation in the nitrided sheet, the Goss grains are not dominant in size, area fraction and proportion of Σ3—Σ9 grain boundaries, but have extremely obvious advantage in the proportion of high energy grain boundaries, which means, in the initial stage of secondary recrystallization of Goss grains, the high energy grain boundaries may play the more critical role. After secondary recrystallization annealing, the final product with excellent magnetic properties is mainly a sharp Goss texture. And the misorientation angle is about 3° against the standard {110}〈001〉.
付兵, 项利, 乔家龙, 刘静, 仇圣桃. 薄板坯连铸连轧流程制备低温Hi-B钢织构的演变及Goss晶粒的发展[J]. 材料导报, 2022, 36(9): 20120130-8.
FU Bing, XIANG Li, QIAO Jialong, LIU Jing, QIU Shengtao. Evolution of Texture and Development of Goss Grains in High Permeability Grain Oriented Silicon Steel Produced by TSCR Process. Materials Reports, 2022, 36(9): 20120130-8.
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2022, Vol. 36 
