Avaliação da conformabilidade do Aço Transformation Induced Plasticity (TRIP780) eletrogalvanizado e Dual Phase (DP780) galvanizado por imersão a quente

Abstract

The Usiminas, largest Latin American steel supplier of flat steel, has dedicated great efforts for different demands of the market, investing in production facilities and developing new steels for use in vehicles body. The present study has the objective to evaluate the metallurgical behavior of high-strength steels, DP780 hot dip galvanized and TRIP780 electrogalvanized, based on their mechanical properties, metallographic constitution, formability, hole expansion, bake hardening and aging index. The TRIP780 steel showed an excellent formability. The tests results showed a significantly superior performance to the DP780 steel, with the same strength class and thickness in every modes of stamping evaluated, and excellent bake hardening effect, which can providing a further increase in the mechanical strength of the final manufactured components. It is therefore an excellent choice for use in body parts, especially in components requiring higher strength.