Abstract: The effect of different cold rolling process with high reduction rate of primary cold rolling, critical deformation and moderate reduction rate of secondary cold rolling on recrystallization microstructure,textures and magnetic properties of 3.28 % Si silicon steel were researched. The results showed that the steel in the process of 80 % high reduction rate primary cold rolling had the smallest grain size and better grain uniformity, with the average grain size about 103 μm, textures of mainly {111}〈112〉 and next {111}〈110〉, and better comprehensive performances of better P1.5/50 and better B50 and the smallest anisotropy. In the process of 9 % critical deformation, the grain size was the largest of about 156 μm in average, but some grains did not finish complete recrystallization, so the grain uniformity was the worst, with the textures of mainly {111}〈110〉 and {112} plane texture and the weakest {110}〈001〉 texture, and the worst comprehensive performances of the highest P1.5/50, the lowest B50 and the biggest anisotropy. While in the process of 50 % moderate reduction rate of secondary cold rolling, the steel’s grain size was in middle among the three cold rolling processes of about 112 μm in average, and the grain uniformity was the best, with the textures of mainly {110}〈001〉 and {100} plane texture and the best comprehensive performances of the lowest P1.5/50, the highest B50 and better anisotropy.

Key words: non-oriented electrical steel, cold rolling process, microstructure, texture, magnetic properties