Influence of cold rolling process on the Lankford coefficient, drawability and texture of AISI 430 ferritic stainless steel

Abstract

The following paper addresses the large demand for further comprehension of the ferritic AISI 430 steels owing to deep drawing processes and accompanying forming technologies, such as rolling. Their good corrosion resistance and relative low cost, make them reasonably well competitors in a great deal of applications. There has been thus evaluated in a pilot mill the influence of three different cold rolling passes with 76% thickness reduction to the drawability and mechanical properties of stainless steel plates. Erichsen, Nakazima and tensile tests were complemented with ODF, pole figure, SEM-FEG observations. It was believed that changes on the cold rolling passes, which alters the anisotropy of materials, would favorably influence deep drawing applications. Experiments revealed, however, that changes defining the deep drawing parameters from 15, 20 and 24 passes, were not statistically significant after rolling. Notwithstanding, texture gradients are reported.