Gas metal arc welding (GMAW) welding (weldingwelder.blogspot.com)
GMAW is a welding process that creates an electric arc between an automatically
fed wire electrode and the work piece. The arc heat melts the parent metal and filler
wire. A supply of shielding gas that excludes atmospheric gases from the weld zone is
introduced around the arc.
The GMAW welding process needs a suitable and constant voltage power source (DC),
a wire feed unit, consumable wire electrodes, a shielding gas supply, a welding gun, a
work clamp and leads. GMAW equipment is not as cheap as MMAW and requires some skill to set up
properly. A good operator can use the GMAW process to weld most materials in most
welding positions.
Typical uses for the GMAW process include:
. light/heavy fabrication
. general engineering
. most materials and thicknesses.
Flux-cored arc welding (FCAW) welding (weldingwelder.blogspot.com)
FCAW is a welding process that creates an electric arc between an automatically fed,
hollow wire filled with flux and the work piece. The arc heat melts the parent metal, filler
wire and flux. The flux may also add additional material or elements and breaks down
in the arc to produce a gaseous shield that excludes atmospheric gases from the weld
zone. An optional supply of shielding gas may be introduced around the arc.
The FCAW welding process needs a suitable and constant voltage power source (DC),
wire feed unit, consumable flux-filled electrodes, an optional shielding gas supply, a
welding gun, a work clamp and leads.
FCAW equipment is generally more robust than GMAW plant and requires some skill to
set up properly. The process may be self shielding or gas shielded.
Typical uses for the FCAW process include:
. heavy fabrication
. general engineering.
FCAW has a better deposition rate and fusion than GMAW.
Submerged arc welding (SAW)
SAW is a welding process that creates an electric arc between an automatically fed
wire electrode and the work piece. The arc heat melts the parent metal and filler wire.
A supply of flux material is introduced around the arc to contribute to the welding
operation, exclude atmospheric gases from the weld zone and form a slag over the
cooling weld.
The SAW welding process needs a heavy duty power source (DC), a wire feed unit,
wire electrodes, flux and a flux delivery system, a power head unit, a welding gun, a
work clamp and leads.