2016 Volume 66 Issue 11 Pages 617-620
In order to improve deep drawability of Al–Mg–Si alloy sheets for automobile body panels, texture control for increasing the r-value of the sheets was performed for a 6022 aluminum alloy processed by cold rolling and differential-speed warm rolling. Recrystallization texture including {111}〈110〉 orientation favorable to deep drawability developed after the three-step annealing proposed in this paper, which consists of the two-step annealing for recrystallization and the final solution treatment. The heating process in the first stage of the annealing affects the evolution of {111}〈110〉 recrystallization texture most strongly. In the heating process, the {111}〈110〉 orientation developed with increasing temperature, while the intensity of {001}〈100〉 (cube) orientation unfavorable to deep drawability decreased after it increased. As a result, recrystallization texture of a sample obtained through the three-step annealing process had considerably weaker {001}〈uv0〉 components than that of an only solution-treated sample in addition to a main {111}〈110〉 component.
