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Welding

Welding Process

Welding
Welding is a process by which two materials, usually metals, are permanently joined together by the coalescence, which is induced by a combination of temperature, pressure and metallurgical conditions. The particular combination of these variables can be range from high temperature with no pressure to high pressure with no increase in temperature.

There are a number of different methods of classifying the various welding process. One of the more commonly used groupings is given below
1.Fusion welding
2.Pressure welding

Fusion welding
Fusion welding process are classified as follows

  • OXY FUEL WELDING (OFW)
  • SHIELDED METAL ARC WELDING (SMAW)
  • GAS METAL ARC WELDING (GMAW)
  • GAS TUMGSTEN ARC WELDING (GTAW)
  • SUBMERGED ARC WELDING (SAW)
  • FLUX CORED ARC WELDING (FCAW)
  • ELECTROSLAG WELDING (ESW)
  • ELECTROGAS WELDING (EGW)
  • ELECTRON BEAM WELDING (EBW)
  • LASER WELDING (LW)
  • THERMIT WELDING (TW)

Pressure welding
Pressure welding process are classified as follows

  • RESISTANCE WELDING (SPOT, SEAM, PROJECTION)
  • FLASH BUTT WELDING
  • EXPLOSIVE WELDING
  • STUD WELDING
  • FRICTION WELDING
  • INDUCTION WELDING

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