3%Si-Fe粗大結晶の圧延集合組織に及ぼす初期方位と鋼中炭素の影響

抄録

Influence of the initial crystal orientation and carbon content on rolling texture was investigated using quasi-single crystals in 3.2 mass% Si steel. These specimens had {110}<001> and {110}<113> crystal orientation which were known for the near surface texture of the hot-rolled band.

In the case of the ultra low-carbon specimens, initial {110}<001> rotated to {111}<112> after 66% reduction cold rolling and initial {110}<113> rotated to near {211}<124>. It was thought that the crystal rotation from {110}<113> to near {211}<124> caused by an activation of {110} slip system which had the second largest schmid factor. {211}<124> was not known for the stable rolling texture, however {211}<124> intensity in present experiment was extremely strong. In addition, {211}<124> has geometric character that if it rotates by an activation of one slip system, it will revert to the initial crystal orientation {211}<124> by an activation of another slip system.

In the case of the specimens containing carbon, {110}<001> rotated to {111}<112> and {100}<011> caused by deformation twinning. On the other hand, {110}<113> rotated to {211}<113>-{111}<112> during the cold rolling. The deformation twinning was also observed. It was thought that the crystal orientation in the deformation twinning rotated to near {111}<112> by an activation of {110} slip system.