Estudio en el rango 500°c – 550°c de la degradación microestructural del acero A36 y fundición nodular perlítica por efecto de termofluencia.

Abstract

It is presented the results that were collected in the study of the effect of the phenomenon called thermofluence in two metallic materials called A36 and nodular perlite smelting, which in some countries this phenomenon is also known as creep. This study is carried out since in the country there is not much known about how affects the thermofluence in these two materials of common use, both artisanal and industrial. After tabulating the results were reported about behavior, maximum fatigue limits that can withstand materials at the temperature ranges of 500°C -550°C with the load of 2448kgf since the phenomenon called thermofluence involves these two physical variables. This helps the artisanal branch to take into account this factor for the design of equipment that use these two materials and that are subject to thermofluence. The inductive method was used to obtain 15 thermofluence tests, 15 metallographic tests, 15 microhardness tests, at temperatures of 550°C, 545°C, 540°C, 535°C, 530°C for A36 steel thermofluence at 530°C due to the presence at the microstructural level of the W and R cavities. For the perlite nodular cast iron, 18 thermofluence tests, 18 metallographic tests, 18 microhardness tests, were carried out at temperatures of 550°C, 540 °C, 530°C, 520°C, 510°C, 500°C, and there was not found thermofluence in any of them of these ranges or morphological changes at the microstructural level. It is recommended to disseminate the information of this research to the industrial and professional guild to obtain reliable and safe designs of structural elements that are built in A36 steel subjected to the thermofluence phenomenon.