Sub Merged Arc Welding (SAW Process)

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Sub Merged Arc Welding (SAW Process):

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• Welding is a process of metal joining by applying heat and some times pressure 

Classification of welding processes:

Forge or Pressure welding :- The work piece are heated to plastic state & then work pieces are joined together by applying pressure on them. In this case no filler material is used.

Fusion or non- pressure welding :- Here edge of work piece to be joined & filler material both are heated to a temp. above the melting point of the metal & then allow to solidify

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Solid State welding : The solid state welding depends upon the theory

that if two perfectly clean metallic surfaces are placed in an intimate contact ,

the cohesive force between atoms of the two surfaces is sufficient to hold them together.

The various solid state welding process are:

1. Friction Welding
2. Ultrasonic Welding
3. Diffusion Welding
4. Explosive Welding

Modern Welding Processes: 

1. Electron Beam Welding
2. Laser Beam Welding

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