Estudio de la corriente de transición en GMAW (MIG/MAG)

Abstract

GMAW welding is an extremely versatile process due to the variety of weldable alloys, thicknesses, welding position, high productivity, viability compared to other processes, easy mechanization and automation. The technique is characterized by its metallic transfer modes, which have specific applications regarding material thickness and welding position. Therefore, the good characterization and knowledge of these modes is necessary. In this way, this work was proposed with the objective of identifying the transition between the globular and “spray” transfer modes through the development of a characteristic curve of the process. For this, a first approach of the study was done searching for the desired welding parameters and, later, through the use of a droplet collection system, droplets of several tests were obtained and associated with the welding currents used. Thus, after analyzing and processing the data obtained, it was possible to trace the Droplet Volume vs welding Current curve, that characterizes the Globular and Spray transfers and the transition region between them.