关键词: 无取向硅钢, 两阶段轧制, 中间退火, 织构

Abstract: Production process of a non-oriented silicon steel is primary cold rolling→intermediate annealing→secondary cold rolling→final recrystallization annealing. The effect of intermediate annealing temperatures (400, 650, and 800 ℃) on the texture of the tested non-oriented silicon steel during the preparation process was investigated. The results show that with the increase of intermediate temperature, the grain size gradually increases, resulting in an increase in grain size of the cold-rolled sheet in the secondary stage, which further leads to an increase in the final recrystallized grain size. The texture intensity of the intermediate annealed specimen decreases, the λ texture components disappear, but the γ texture components gradually become the dominant texture. Strong Goss texture is formed in the specimen intermediate annealed at 650 ℃, and after the second stage rolling, a part of the Goss texture component is retained and the γ texture with the peak at {111}<112> is formed. In the initial stage of subsequent recrystallization annealing, both η and λ texture oriented grains nucleate at their shear bands. With the extension of the annealing time, the deformed matrix is consumed. After annealing for 1 h, the recrystallization texture of the final recrystallized specimen usually exhibits strong Goss texture.

Key words: non-oriented silicon steel, two-stage rolling, intermediate annealing, texture