Explosive Welding

 Explosive Welding

Definition: It is a solid-state welding process in which coalescence is achieved by high-velocity movement produced by controlled detonation.

Working :  In this controlled detonation is used to join two flat plates (plates can also be inclined to each other) . Explosive welding contains backer (target plate/base plate on which metal is to be weld) , flyer plate (above this part explosive material placed like  a carpet/mat ) ,explosive layer , detonator . In this welding a detonator is placed at the starting place of the welding desired by the customer /user then a single electric detonation cap is used to ignite the explosive . When the explosive material on the top of the flyer plate start detonating the flyer plate start joining with the base metals by forming vortex or whirls at the interface.

Advantages of Explosive Welding:
  • Can weld metals that are difficult to weld by a conventional method.
  • Clean welding
  • A large area can be weld quickly
  • Does not face problems like fusion welding
Disadvantages of Explosive Welding :
  • Expensive
  • Need a Highly trained person to control detonation
  • Need License and other clearance from the government authority to do it to do these kinds of welding
  • High impact resistance and ductile material can be used for these kind of welding
  • Complex geometry can't be weld by using this method
Applications of Explosive Welding:
  • Heat exchangers
  • Used for repairing tubes where conventional method can't be use
  • Mechanical and aero industry for joining dissimilar metals

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