| Grain-oriented silicon steel is the indispensable soft magnetic alloy in electricity, electronics and military industry, it is mainly used for various types of transformer core. Grain-oriented silicon steel has complex process, strict technology and high correlation between production processes, so how to achieve low-cost, efficient way to produce stable high quality products, which is the main direction of manufacturing technology. Cold rolling is the key process to connect hot rolling and recrystallization annealing. Therefore, it is necessary to explore and control deformation and recrystallization texture of grain-oriented silicon steel.In this paper, we use hot-rolled sheet produced by low temperature hot rolling process as the initial material, and focus on the effect of cold rolling temperature and roll gap geometry on deformation and recrystallization texture.The texture of cold-rolled grain-oriented silicon steel at room temperature is mainly consisted by{001}<110> as the peak of a (RD//<110>) and y texture (ND//<111>); Low temperature (300℃) rolling texture decreased the intensity of a texture (RD//<110>), with the differences of the reduction rate and thickness, warm rolling will strengthen{111}<112> and weaken{111}<110> or weaken the whole y texture (ND//<111>). Rolling with smaller geometry can further strengthen the impact of warm rolling. The effect of rolling temperature and rolling geometric factors on the different thicknesses of the layer deformation texture, is related to the initial texture, shear strain caused by crystal rotation and shear strain caused by inhomogeneous deformation degree.After recrystallization annealing, a texture disappeared, formed the texture features of y texture{111}<112> and η texture (RD//<001>). Cold rolled grain-oriented silicon steel recrystallization texture is mainly by{111}<112>, whereas warm rolled sheet is mainly by η texture (RD//<001>). Warm rolling can significantly weaken each layer of y recrystallization texture. Rolling with bigger gap geometry can further strengthen the1/2layer of recrystallization texture, whereas smaller one can further strengthen the1/4and1/2layers of recrystallization texture. The effect of warm rolling and small rolling gap geometric factors on recrystallization texture can be attributed to enhance the deformation texture (111)<112>, and decrease a texture (RD//<110>). The former increases the density of shear zone nucleation of η nucleation, and the latter limits the development of y recrystallization texture. |
