Evolução da textura de recristalização durante o recozimento de um aço IF microligado com TI

Abstract

IF steels (IntertitialFree) in the form of thin plates are intended mainly for the production of parts by embossing process. The ideal texture for this material would be fiber DN ((111) <uvw>), so the texture Turned Cube ({001} <110>) is undesirable for this process. To acquire this fiber the material is hot rolled and cold, respectively, and heat treated (annealed), favoring the appearance of this texture by recrystallization of the grains. The aim of this study was to evaluate the texture cold rolling with temperature during heating. It was used the technique of X-ray diffraction for measuring pole figures and calculating the crystallographic orientation distribution function (FDOC) using the software Labotex. The samples used were plates (14x25 mm) IF steel microalloyed with Ti, cold rolled with 70% reduction. Measurements were taken at different temperatures during heating. The samples were reduced to half thickness (~ 0.5 mm), abraded and etched with a 95% solution of H2O2 and 5% HF. It was observed that the temperature rise eliminates the component rotated and hub increases the strength of the fiber DN. The evolution of the microstructure was also analyzed and compared with the evolution of the texture.