Arc Welding Flashcards
Consumable Electrode
The electrode is consumed in the process by melting and providing the filler metal.
Non-Consumable
The electrode is not consumed in the process the filler metal is added separately.
Arc-Welding
Incorporates a high-energy electric arc to melt the parent metal.
Shielded Metal Arc Welding (SMAW)
Manual arc welding or “stick” welding. Uses a consumable electrode that consists of a low carbon steel core and coating. The coating produces a gas-shielding to protect the molten metal from the atmosphere. Coating referred to as the “Flux”.
Gas Tungsten Arc Welding (GTAW) or Tungsten Inert Gas Welding (TIG)
Employs a non-consumable electrode and a separate wire filler metal. Atmospheric shielding provided by supplied inert gas. Manual or Automated.
Gas Metal Arc Welding (GMAW) or Metal Inert Gas Welding (MIG)
Semi-automatic, continuous wire feed system. Filler metal is a bare solid wire that is both the filler material and consumable electrode. Shielding gas is used.
Flux Coared Welding (FCAW)
Semi-automatic, continuous wire feed system. Wire is bare and hollow filled with flux that serves as a filler material and consumable electrode. Shielding gas may be used.
Submerged Arc Welding (SAW)
High-rate automated deposit. Uses wire feed as a consumable electrode. Arc is submerged beneath a blanket of granular flux that shields. Can use more than one electrode.
Plasma Arc Welding (PAW)
Plasma is fed through a nozzle that surrounds a tungsten electrode. Separate shielding gas is used to prevent oxidation. Used on high-temp resistant metals.
Plasma Arc Cutting
Inert gas is forced on the surface of a material at high pressure from a nozzle that acts as an electrode. Producing a high-energy arc that ionizes gas, increasing the temperature to melt through high-temp resistant metals.
Percussive Welding (PW)
Used to make Butt Joints on the flat ends of material. Material is connected to a capacitor that is charged to about 3,000 volts. Material is driven together by a high-spring or air pressure, prior to contact a high current arc heats material fusing it together with the provided pressure.
