ABSTRACT
Welding technologies, especially the GMAW process, are well known and in great demand in the offshore oil and gas industry, especially for high thickness applications. As a result, technologies designated as high-performance GMAW variants have naturally emerged to meet certain specific quality and productivity requirements. Nevertheless, deeper understanding of the phenomena and effects responsible for their distinctive results is still lacking, which is needed for better application and customization for specific welding conditions. In this exploratory context, this work provides comparative analysis of one of these novel variants, called Dynaflex in relation to conventional GMAW. Process analysis via high-speed videography, macrography, oscillograms and IR thermography provided insights on the principles of the technology, its limitations and dependence on the welding power source.
KEY WORDS: welding defects, MIG/MAG, Dynamically Flexible Arc, high speed welding, high penetration, buried-arc, weld pool control.
Reference
SILVA, R. H. G.; MATOS, P.; ZANELLA, G. C.; SCHAEFFER, C. M.. Study of Humping Formation in the Conventional GMAW Process in Comparison to Dynamically Flexible Arc for Offshore Industry. In: Proceedings of the 33rd International Ocean and Polar Engineering Conference. International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-80-7; ISSN 1098-6189. Ottawa, Canada, June 19-23, 2023.