|
Electrogas Welding (EGW) is a specialized welding process having
similarities to the gas metal arc welding (GMAW) or the flux cored arc
welding (FCAW) processes for vertical position welding. The electrode
deposits filler metal in the cavity formed by backing plates or shoes
that bridge the groove between the plates being welded. The electrode
may be solid, metal cored, or flux cored, and additional shielding may
or may not be obtained from an externally supplied gas or gas mixture.
The weld is usually completed in a single pass. Fundamentals of the process,
including the various methods of welding, are presented. A discussion
of equipment, consumables, applications, and metallurgical advantages
and limitations is provided. The selection of process variables and operating
conditions and typical EGW procedures is then presented. Inspection of
welds, and training and qualification of welding procedures and operators
are described. Finally, a troubleshooting guide, safety considerations,
and a supplementary reading list are presented.
|