Limitations of pulsed MIG‐MAG welding for obtaining welded joints with constant penetration and bead shape

Summary

This article presents a study of the MIG‐MAG welding process with pulsed‐arc transfer applied to joints in motor vehicle exhaust pipes and silencers for which the mean thickness of the base material is approximately 2 mm, and the ratio of the latter to the workpiece diameter is about 0.04. It is shown that, for this type of welded joint, constraints on the maximum and minimum values for penetration into the base metal are incompatible with those relating to the shape and size of the weld bead due to progressive heating of the workpieces during the process.