Welding, Flash Butt

Resistance welding in which the components are brought together after the voltage has been applied so that sparking and local arcing take place for a predetermined amount of time, heating the contact areas progressively and burning off portions of them. The whole surface is thus brought up to the welding temperature, and a force is applied, joining the parts together to make the weld. Flash welding will usually result in a higher weld strength with a much smaller flash or upset burr.