关键词: 无取向硅钢, 冷轧, 织构, 再结晶行为

Abstract: The influence of cold rolling reduction rate on microstructure and texture of Fe-1.5%Si non-oriented silicon steel at each process stage was analyzed. The results show that the initial structure of the hot-rolled plate is fine equiaxed crystal. The average grain size is 18 μm in the surface layer and 36 μm in the middle layer. After cold rolling at reduction rates of 25%-64%, the plate forms strong α and λ texture and weak α^* texture. After cold rolling at reduction rates of 64%-73%, the plate forms strong γ and sub-strong α texture. The cold-rolled Cube texture mainly rotates along four paths: ① rotating along the λ texture to {100}<021> and then along the α^* texture line; ② rotating along the λ texture to {100}<011> then along the α texture line; ③ rotating along {013}<031>, {110}<110> and nearby orientations; ④ rotating along the η texture line. In the early stage of annealing, Cube and Goss-oriented grains are preferentially nucleated, but with the extension of annealing time, their proportions are always small, the Cube recrystallization ratio is 0.55%-1.94%, and the Goss recrystallization ratio is 0.54%-2.85%, and the proportion of γ-oriented grains increases rapidly. After annealing, complete recrystallization occurs, and the recrystallization texture is mainly composed of strong γ texture, α texture and weak η texture. Unfavorable textures account for the main component.

Key words: non-oriented silicon steel, cold rolling, texture, recrystallization behavior