Abstract: The microstructure and texture evolution of oriented silicon steel produced by Ningbo Iron and Steel Co., Ltd. were analyzed by optical microscope and X-ray diffraction. The results showed that the microstructure of the slab was inhomogenous along the thickness direction after hot rolling. After first cold rolling and decarburizing annealing, the microstructure changed from strip fibrous to equiaxed primary recrystallized grains, and the average grain size of the primary recrystallization microstructure was 18.17 μm, and the texture was mainly α texture and γ texture. After two-stage cold rolling , the crystal grains were compressed again and transformed into fibrous structure, and the texture was mainly γ texture.After high temperature annealing, secondary recrystallization occurred, and the grains grew abnormally to centimeter level , and the texture was the single and sharp Goss texture.

Key words: oriented silicon steel, microstructure, texture, recrystallization