Avaliação de potencialidades do processo de soldagem MIG/MAG com arames eletrodo ultrafinos

Abstract

The present work describes the use of the MIG / MAG welding technique with ultrafine electrode wires (diameters less than 0.8 mm), including rootpass by spray transfer mode in the flat and vertical down welding positions, showing their positive and negative points.Preliminary testswere performed to evaluate appropriate welding parameters to achieve the desired metallic transfer, and to observe the qualitative aspects of the process. In addition to these tests, wereperformed definitive experiments in order to test the viability of the process where selected samples were prepared and analyzed under a microscope.Finally, welding ofthin sheets of thickness3,5 mm were performed. These last tests showed promisingresults(robustness of the process) compared to thicker plates welding,thus justifying further studies.