The primary recrystallization texture of 3.3% Si steel containing 0.040% carbon was studied with interest in the effect of the states of carbon prior to cold rolling. The following four states of carbon were obtained by changing cooling way after annealing, that is, carbon in solution, very finely dispersed carbides (10-50 nm), finely dispersed carbides (100-300 nm) and coarse carbides on grain boundaries. The specimens treated in the above conditions were cold rolled 60% and then annealed at 800°C.
The very finely dispersed carbides had the strongest effect on promoting dislocation tangling at cold rolling stage, recrystallization at heating stage, and thereby formation of (110) [001] recrystallization texture. The possible mechanisms for this result are as follows. (1) The very finely dispersed carbides are optimum with respect to size and distribution to yield dislocation pile-up, resulting in formation of deformation bands. (2) They are dissolved and disappear at later stage of cold rolling or heating stage of subsequent annealing. (3) They contribute to preferred nucleation by (1) and to growth of (110) [001] grains by (2).