Influência de diferentes tratamentos térmicos na microestrutura e nas propriedades mecânicas de um aço utilizado em eixo de aerogerador

Abstract

Thermal treatments are of great importance for the development of materials because it changes their properties or give them specific characteristics. In this work, two different thermal treatments were performed, full annealing and normalization, in a steel used as a wind turbine support axis to verify changes in microstructures and mechanical properties through optical microscopy, scanning electron microscopy and Vickers microhardness test . In addition, the material was identified by calculating carbon composition using the Image J program with images obtained by optical microscopy. Therefore, it was determined that the steel had a content of 0.55% carbon. After the comparative hardness study, a higher hardness of the normalized sample was verified and a lower one for the annealed sample compared to the sample received (without treatment). Therefore, the expected objectives were achieved at the end of the work because all the steps were carried out successfully, thus obtaining an accurate results analysis.