Status and Perspectives in Overlaying under Particular Consideration of Sophisticated Welding Processes

Abstract

Surfacing is an indispensable measure both to conserve as well as to generate worth. Different welding methods have been created over the time, were established and have found their long-term utilization in numerous specific industrial applications. This paper is intended to basically focus on some of the most important overlay welding processes and an evaluation of most recent process developments and advancements respectively, standing for remarkable improvements in terms of weld quality and reproducibility. The emphasis should thereby being laid upon the fully mechanized Gas Shielded Tungsten Arc (Hot wire) Welding (GTAW) and the Gas Shielded Metal Arc Welding (GMAW). Especially the usage of the highly advanced Cold Metal Transfer Process (CMT) enables the user to achieve new levels in process stability and quality, also in the field of overlaying.