The present work is based on an assessment of experimentally obtained results from the application of different methods of evaluation, reported in the specialized literature, of the electrical charge transference stability in the arc. A simple factorial design, taking the welding current as independent variable, was applied to the process with an AWS A5.1 E6013 electrode. The welds were carried out in the flat position by a gravity device. It was possible to obtain criteria to classify the electrical charge transference stability of the process, by digital signal processing and statistical technique. The outcome was based on visual inspection and morphologic studies. It was concluded that amongst the considered parameters the average value of the arc conductivity during re ignition peaks and the quantity of re ignition peaks are the more representative indexes, both from statistics and from the phenomenological points of view. This finding is validated by the fact that the bead morphology and the stability analysis of the electrical charge transference process coincides with the fact that the 160 A (for 4-mm-diameter electrodes) is the most stable regime.
Welding; Digital Processing; Statistic
