16 September 2018

Advantages and disadvantages of resistance welding

The resistance welding process is also a fusion welding process where both heat and pressure are applied to the joint but no filler metal or flux is added. The heat necessary for the melting of the joint is obtained by the heating effect of the electrical resistance of the joint and hence, the name is resistance welding. In this article, you can check out the advantages and disadvantages of resistance welding to understand more about it.

Advantages of resistance welding :

  • It is a very economical process because there are no consumables used in this process so environment-friendly too. 
  • The heating of the workpiece is confined to a very small part so less distortion.
  • Very little skill is required to operate a resistance welding machine because easily automated. 
  • By this process also weld dissimilar metal as well as metal plates of different thicknesses.
  • Welding speed is very high.
  • Weld up to 0.1 mm thin as well thick up to 20 mm metals. 
  • High production rate thus suited for mass production. 
  • This process does not require any filler metal, flux and shielding gas. 

Disadvantages of resistance welding :

  • The resistance welding machine is highly expensive.
  • Lower tensile and fatigue strength.
  • It is limited only to lab joints.
  • The limit of sheet metal thickness is less than 3 mm.
  • Less efficient for high conductive materials. 
  • High electric power is required.