Which of following is NOT a conventional type of welding process?

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  1. Arc welding 
  2. Resistance welding 
  3. Gas welding 
  4. Friction welding 

Answer (Detailed Solution Below)

Option 4 : Friction welding 
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Detailed Solution

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Explanation:

Friction welding:

  • Friction welding is not a conventional type of welding process.
  • Friction Welding is a solid-state welding process which produces welds due to the compressive contact force of workpieces which are either rotating or moving relative to one another.
  • Heat is produced due to the friction which displaces material plastically from the interface

 

Additional InformationWelding:

  • Welding is a process of joining two similar or dissimilar metals by fusion, with or without the application of pressure and with or without the use of filler metals.

Based on the composition of joints, the joining process may be classified as:

Solid-state welding:

It is also called as Autogenous welding

It is classified into:

  • Explosive Friction
  • Ultrasonic welding
  • Diffusion welding
  • Friction welding
  • Forge welding

Liquid state welding:

It is also called as Homogeneous welding

It is classified into:

  • Resistance welding
  • Arc welding
  • TIG welding
  • MIG welding
  • PAW welding
  • Gas welding

Solid/Liquid state welding:

It is also called as Heterogeneous welding

It is classified into:

  • Brazing
  • Soldering

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