Description: This variant of the TIG process is a method of
forming a deposited metal by passing current through the
filler wire which is heated to a temperature near its melting
point before being introduced into de weld pool. The wire is
heated by a low voltage AC electrical resistance from a
welding source at constant potential. The filler wire can be
melted independently of the arc heat source which melts the
base metal. Thus, the deposition rate increases considerably
when compared to the cold wire method (see graph.1)