Effect of two-stage cold rolling and annealing on texture development and plastic strain ratio

Abstract

Recrystallization textures developed during two-stage cold rolling and annealing have been studied in an aluminium-stabilized steel by means of an inverse pole figures technique. An intensity parameter involving a combination of reflections, has been related to the average plastic strain ratio, R. The results show that the amount of cold reduction in the first stage has a greater effect on texture than the rolling in the second stage. Nevertheless, the second stage may have some important effects. Suppression of the {100} and intensification of the {111} and {211} components are of particular interest, but these are significant only if a strong {111} texture has already been produced in the first stage. The most important factor which controls the texture development is the distribution of reductions between the two stages. Combination of rolling and annealing in two stages with high reduction in the first and low in the second stage may produce not only as strong a texture and as high an R value as single rolling but also a considerably lower ∆R value. This, together with a favourable grain size, may be taken to indicate that the production of a high drawability steel with low tendency to earing and good stretching properties is a practical possibility