Hybrid Plasma/mig Welding Reduces Welding Time

摘要

Gas tungsten arc welding (GTAW) has become an indispensable welding method for many industries because it produces high quality welds and keeps equipment costs low. In the power generation industry, GTAW with cold filler wire is a method often used to weld tubes in the butt joint position in heat exchangers and pipelines. Standard benefits of the GTAW with filler wire include high quality spatter free welds, as well as 100 percent penetration with independent control of the heat source for the root pass. The addition of cold filler wire and multiple passes to fill joints results in a consistent and clean cap weld. Weld quality in the final welds in power plant applications is critical; therefore the welds must be free of imperfections. Heat exchanger components in boilers, pipes and/or tubes are often exposed to extreme conditions such as open flame heat sources, as well as environmental and dynamic stresses due to weight or pressurization of the product within.