Advanced Gas Tungsten Arc Weld Surfacing Current Status and Application

Gas Shielded Tungsten Arc Welding (GTAW) - a process well-known providing highest quality weld results joined though by lower performance. Gas Metal Arc Welding (GMAW) is frequently chosen to increase productivity along with broadly accepted quality. Those industry segments, especially required to produce high quality corrosion resistant weld surfacing e.g. applying nickel base filler materials, are regularly in consistent demand to comply with zero defect criteria. In this conjunction weld performance limitations are overcome employing advanced 'hot-wire' GTAW systems. This paper, from a Welding Automation perspective, describes the technology of such devices and deals with the current status is this field-namely the application of dual-cathode hot-wire electrode GTAW cladding; considerably broadening achievable limits.