Influence of initial crystal orientation and carbon content on rolling-induced texture in 3 mass% Si steel

The influence of the initial crystal orientation and carbon content on rolling-induced texture was investigated using quasi-single crystals of 3.2 mass% Si steel. These specimens had {110}< 001> and {110}< 113> crystal orientations, which are common near surface textures for hot-rolled steel band. In the case of ultralow-carbon specimens, the initial {110}< 001> orientation rotated to {111}< 112> after 66% reduction cold rolling and the initial {110}< 113> orientation rotated to near {211}< 124>. It is considered that the crystal rotation from {110}< 113> to near {211}< 124> is caused by activation of the {110} slip system, which has the second largest Schmid factor. The {211}< 124> orientation is not considered to be a stable rolling-induced texture; however, the {211}< 124> orientation was well developed in the present experiments. In addition, the {211}< 124> orientation has a geometric characteristic that if it rotates by activation of one slip system, it will revert to the initial {211}< 124> crystal orientation by activation of another slip system. In the case of specimens containing carbon, the {110}< 001> orientation rotated to {111}< 112> and {100}< 011> due to deformation twinning. On the other hand, the {110}< 113> orientation rotated from the {211}< 113> orientation to the {111}< 112> orientation during cold rolling. Deformation twinning was also observed. It is considered that the crystal orientation of the deformation twins rotated to near {111}< 112> by activation of the {110} slip system.