HEAT INPUT INFLUENCE ON 2205 DUPLEX STAINLESS STEEL JOINTS USING ROBOTIC GMAW WELDING PROCESS

Metallic materials manufacture through the application of joining processes that favour their application in the diverse requirements demanded by industrial production systems, possess a constant challenge, since it places welding technologies in continuous improvement to favour the coalescence of different materials. Robotic GMAW welding is one of the joining processes widely used in the industrial sector to join metallic materials of different thicknesses and chemical composition, such as stainless steels, in which high-quality joints are obtained at a shorter application time, maintaining its mechanical and anticorrosive properties by controlling its operating parameters. The chemical, nuclear and/or petrochemical industry requires the use and adaptation of materials and their joints into particularly corrosive environments in their applications, such as those manufactured in duplex stainless steel. However, it has been observed that the welded joints of these steels present a notorious condition in their mechanical properties and microstructural characteristics through joining processes, such as GMAW, when their operating parameters are not adequately established, generating conditions in the welding quality. In the present investigation, parameters effect of robotic GMAW process through the temperature acquisition and effect of the input heat on the microstructural evolution and mechanical properties in duplex 2205 stainless steel joints are analysed