Influencia de la transferencia por arco sobre la microestructura de uniones soldadas usando arco pulsado

this article studies the influence of pulsed arc transfer in the gmaw process on the microstructure, using two shielding gas composition and the pulsed arc and short circuit transfer. the microstructure and mechanical properties was characterized and the results show that is achieved a greater tensile strength and more homogeneous in the hardness profile using the pulsed arc transfer, because it creates a more uniform size grain in the three areas of welding. the presence of a circular ferrite was constant in all treatments tested, while widmastatten ferrite was presented preferably in the pulsed arc transfer.