Análisis Micrográfico de una Unión Soldada con Postcalentamiento en un Acero AISI/SAE 1045 en Doble Fase

Abstract

Double phase steels are currently widely used in the industry, however there is little information on the welding processes they request, there is also little literature on metallography and the mechanical properties of welded steels with these characteristics. To contribute in this area of research, it is proposed to perform a micro-graphical analysis of a welded union of heat treated carbon steel. For the execution of this work with AISI/SAE 1045 steel, treated from intercritical temperature, was carried out joints joining process using welding electrode E-7018, later the post-weld treatment were applied with times of 5,10 and 15 minutes, in order to determine the microstructure of the heat affected zone and the base metal of welded joints. The results was compared with those obtained in test specimens of the same material without welding thermal treatment, in order to know the phases present in each case.