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Essay On Welding Technology

1001 Words5 Pages

OBJECTIVE :- Demands for properties of materials used in structures include many things such as strength, toughness, fatigue property, corrosion and heat resistance, and these comes to be higher level. On the other hand, demands for welding technologies become to be severe with these demands for properties, and these are wide variety such as high efficiencies, high qualities, and many operations, labor effective and low prized.
Problems in the field of welding technologies are very wide, for example, application of newly developed steels, stable operations of welding lines in steel work plants and welding procedures in the field of engineering. Further development is needed accordingly in the field of welding.
Needs and development tendency of welding technology in the fields of plates, sheets, pipes, stainless steels and titanium, and the …show more content…

The weld area is protected from atmospheric contamination by an inert shielding gas such as Argon or Helium.
 Gas metal arc welding (GMAW) :- Commonly termed MIG (metal, inert gas), uses a wire feeding gun that feeds wire at an adjustable speed and flows an argon-based shielding gas or a mix of argon and carbon dioxide (CO2) over the weld puddle to protect it from atmospheric contamination.
 Flux-cored arc welding (FCAW) :- Identical to MIG welding except it uses a special tubular wire filled with flux; it can be used with or without shielding gas, depending on the filler.
 Submerged arc welding (SAW) :-An automatically fed consumable electrode and a blanket of granular fusible flux. The molten weld and the arc zone are protected from atmospheric contamination by being "submerged" under the flux blanket.
 Electro slag welding (ESW) :- Highly productive, single pass welding process for thicker materials between 1 inch (25 mm) and 12 inches (300 mm) in a vertical or close to vertical

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