Influence of Initial Crystal Orientation and Carbon Content on Rolling-induced Texture in 3 Mass% Si Steel

Abstract

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.