Avaliação das propriedades mecânicas em ligas ferríticas com 5% de mo e diferentes teores de Cr

Abstract

The ferritic steels have broad applicability for various uses equipment industry, with the requirement of such a high resistance to corrosion without the loss of their mechanical properties. However, the aim of this study is to evaluate the mechanical properties of ferritic alloys with Mo content higher than that of commercial alloys. To this were not made three commercial alloys with different concentrations of chromium (Cr) 17%, 15% and 9%, called A1, B1 and E1, respectively, and the same amount of Mo equal to 5%. Alloys, provided solubilized initially were characterized by optical microscopy (OM) and hardness measurement. Then samples were taken for the preparation of samples to allow the characterization of mechanical properties at room temperature, by performing tensile and Charpy-V. Also, tests such as Charpy-V temperature above the environment. The results showed that the three alloys studied showed a brittle behavior at room temperature and that temperature exerts a strong influence on the energy absorbed and the ductile-brittle behavior. It was also found that the alloy with higher concentrations of Cr, A1 League, showed higher hardness. Different quantities of Cr did not change significantly the properties obtained after the tensile test.