anandengg's version from 2018-01-23 09:35

Section 1

Question Answer
Bare metal arc weldingConsumable electrode, no flux or shielding gas
Carbon arc welding (181) CAWCarbon electrode, historical Copper, repair (limited)
Gas metal arc welding [3] 131 135 GMAW Continuous consumable electrode and shielding gas Industry
Gas tungsten arc welding [4] 141 GTAW Nonconsumable electrode, slow, high quality welds Aerospace,Construction(piping),Tool and Die
Plasma arc welding 15 PAW Nonconsumable electrode, constricted arc Tubing, instrumentation
Shielded metal arc welding [5] 111 SMAW Consumable electrode covered in flux, can weld any metal as long as they have the right electrode Construction, outdoors, maintenance
Submerged arc welding 121 SAW Automatic, arc submerged in granular flux
Atomic hydrogen welding (149) AHW Two metal electrodes in hydrogen atmosphere Historical

Section 2

Question Answer
Air acetylene welding (321) AAWChemical welding process, not popular Limited
Oxyacetylene welding 311 OAW Combustion of acetylene with oxygen produces high-temperature flame, inexpensive equipment Maintenance, repair
Oxyhydrogen welding 313 OHW Combustion of hydrogen with oxygen produces flame Limited
Pressure gas welding PGW Gas flames heat surfaces and pressure produces the weld Pipe, railroad rails (limited)

Section 3

Question Answer
Resistance spot welding 21 RSW Two pointed electrodes apply pressure and current to two or more thin workpieces Automobile industry, Aerospace industry
Resistance seam welding[6] 22 RSEW Two wheel-shaped electrodes roll along workpieces, applying pressure and current Aerospace industry, steel drums, tubing
Projection welding 23 PW Semi-Automatic, Automatic, Welds are localized at predetermined points.
Upset welding 25 UW Butt joint surfaces heated and brought together by force

Section 4

Question Answer
Ultrasonic welding 41 USW. High-frequency vibratory energy is applied to foils, thin metal sheets or plastics Solar industries-. Electronics. Rear lights of cars. Diapers.
Roll welding ROW Bimetallic materials are joined by forcing them between two rotating wheels Dissimilar materials
Electromagnetic pulse welding Tubes or sheets are accelerated by electromagnetic forces. Oxides are expelled during impact Automotive industry, pressure vessels, dissimilar material joints
Forge welding (43) FOW The oldest welding process in the world. Oxides must be removed by flux or flames. Damascus steel
Friction welding 42 FRW Thin heat affected zone, oxides disrupted by friction, needs sufficient pressure Aerospace industry, railway, land transport
Friction stir welding FSW A rotating non-consumable tool is traversed along the joint line Shipbuilding, aerospace, railway rolling stock, automotive industry

Section 5

Question Answer
Electron beam welding 51 511 EBW Deep penetration, fast, high equipment cost
Electroslag welding 72 ESW Welds thick workpieces quickly, vertical position, steel only, continuous consumable electrode. Heavy plate fabrication, construction, shipbuilding. Flow welding
Laser beam welding 521 522 LBW Deep penetration, fast, high equipment cost Automotive industry
Laser-hybrid welding Combines LBW with GMAW in the same welding head, able to bridge gaps up to 2mm (between plates), previously not possible with LBW alone. Automotive, Shipbuilding, Steelwork industries
Thermite welding 71 TW Exothermic reaction between alumnium powder and iron oxide powder Railway tracks
Electrogas welding 73 Continuous consumable electrode, vertical positioning, steel only Storage tanks, shipbuilding

Section 6