flash welding

Flash welding is a type of resistance welding that does not use any filler metal.

The equipment used for upset welding is very similar to that used for flash welding.

The difference from flash welding is that the parts are clamped in the welding machine and force is applied bringing them tightly together.

According to the Journal of Materials Processing, the railroad industry is using flash welding to join sections of mainline rail together.

Percussion welding is similar to flash welding and upset welding but is generally considered to be more complex.

Materials and Design discusses the use of flash welding in the metal building industry to increase the length of the angle iron used to fabricate joists.

Other ERW methods include flash welding, resistance projection welding, and upset welding.

A study published in Materials Science and Design proved that flash welding is also beneficial in the railroad industry because it allows dissimilar metals and non ferrous metals to be joined.

Although it is less controllable than the more conventional oxy-fuel welding, arc welding and flash welding, it requires much less equipment and is still used to mend rails, especially in remote areas.