Estudo teórico da estampabilidade do aço lean duplex UNS s32304 através da simulação numérica do ensaio de cinco punções

Abstract

Duplex steels have a high applicability in the oil and gas, chemical and paper and cellulose, mainly due to its characteristics of high resistance to corrosion and high mechanical resistance. These properties derive from its microstructure composed mainly of a ferrite matrix and islands of austenite. Thus, aiming at an even more significant increase in the employability of these steels, it is essential to studies on applicability, types of manufacture and conformation. In this work, studies based on the technique of five punches were performed to evaluate the forming characteristics of Lean Duplex UNS S32304 steel. THE methodology is based on the mechanical characterization of the material to measure its properties, such as flow and anisotropy index. This was followed by a theoretical analysis of the formability of the material through the computer simulation of the five-puncture test. This test works by alternating the shape of the punches, with the in order to vary the types of resulting deformations. The technique extends from the biaxial stretch to the deep inlay. This work presents a theoretical analysis of the behavior of this material in relation to stamping for the various punches. The graph of the theoretical Stamping Limit Ratio for the UNS is displayed S32304 in relation to the five punches used and the influence of the normal anisotropy coefficient on the results.