BUSES ET TUBES DE GUIDAGE EN GRAPHITE PYROLYTIQUE POUR CHALUMEAUX DE SOUDAGE

摘要

The removable nozzle for a gas-shielded welding torch is surfaced with pyrolytic graphite to prolong nozzle life and to render the inner surface thereof less adherent to weld splatter thereby facilitating cleaning. The pyrolytic graphite is oriented with a-b planes concentric with the nozzle axis. The surfacing may be accomplished by securing an insert of appropriately oriented pyrolytic graphite within the exit end of the nozzle. A removable wire guide tube having an outer surface of oriented pyrolytic graphite is also optionally provided.