Caracterização do aço inoxidável duplex UNS S32304 termomecanicamente processado por rota não convencional

Abstract

High mechanical and corrosion resistance are basic requirements for materials used under severe conditions in sectors essential to the Brazilian and global economies, such as the petrochemical, naval, mining and agribusiness industries. Despite having adequate structural properties, conventional steels are susceptible to premature degradation riginating on the surface, mainly due to corrosion aggravated by mechanical stresses. Processing adjustments can be designed and applied to conventional ferrous alloys aiming at increasing durability (reducing economic, environmental and safety impacts), as well as expanding the application possibilities of these materials. This work proposes the modified processing of duplex stainless steel UNS S32304 by [thermo] mechanical methods (hot rolling and cold rolling). The material characterization was performed in order to correlate mechanical and corrosion resistances, evaluated by different microstructural and electrochemical techniques, and adapted mechanical tests.