Texture Evolution during Recrystallization and Grain Growth in Non-Oriented Electrical Steel Produced by Compact Strip Production Process

Evolution of texture and alpha*-fiber texture formation mechanism of Fe-0.65%Si non-oriented electrical steel produced by Compact Strip Production (CSP) process during all the thermo-mechanical processing steps were investigated using electron backscatter diffraction (EBSD) and X-ray diffraction (XRD) techniques. Columnar crystal structure of cast slab is fine and well-developed. Textures of the hot-rolled band are quite different in the thickness direction. During annealing of cold-rolled sheet, gamma-fiber texture grains would nucleate and grow preferentially, and alpha*-fiber texture grains mainly nucleate and grow in the shear zone of alpha-fiber texture of cold-rolled sheet. During the recrystallization process, gamma-fiber texture gradually concentrated to {111}, and gamma and alpha*-fiber texture increased significantly. {111} texture priority nucleation at the initial stage of recrystallization. Due to the advantages of nucleation position and quantity, the content of alpha*-fiber texture is greater than {111} texture in the mid-recrystallization. During grain growth process, {111} oriented grains would grow selectively by virtue of higher mobility, sizes and quantity advantages than that of {411} and {100}, resulting in the gradual increase of gamma-fiber texture and the decline of alpha *-fiber texture.