Recrystallization behavior of a two-way cold rolled 12Cr ODS steel

摘要

Recrystallization behavior of a two-way cold rolled 12Cr ODS steel during annealing in the range of 1273-1473 K was systemically investigated by means of scanning electron microscopy, electron backscatter diffraction, transmission electron microscopy, and hardness testing. Results show that original grains with 110 axis were rotated to 111 axis parallel to normal direction after similar to 60% reduction in thickness. Recovery stage was obvious at 1273 K annealing taking about 100 min, but at higher temperatures it was shortly followed by recrystallization. similar to 84% recrystallization was observed after annealing at 1473 K for 60 min, indicating that the new cold rolling process decreases the recrystallization temperature in comparison with the asfabricated specimen completing recrystallization at 1673 K. In addition, the microtexture evolution was characterized as recrystallization proceeded. The intensity of {111} 110 and {111} 112 components decreased, while intensive {110} 001 component was obtained. Dependence of the stored energy on the orientation of deformed grains is presumed for the reduction of {111} 110 and {111} 112 components, and oriented growth is probably responsible for the enhancement of {110} 001 texture after recrystallization.