The Butt fusion welding machines is divided according to the welding method: flash butt welding machine, steel butt welding machine, copper rod butt welding machine
Welds are formed under the condition that the solid metal of the workpiece is plastically deformed to form common grains. The structure and composition of the weld are close to the base metal (or after heat treatment), and it is relatively easy to obtain equal strength and equal plastic welded joints.
Flash butt welding mainly uses the contact resistance of the workpiece to heat the workpiece, the metal surface melts, the temperature gradient is large, and the heat affected zone is relatively small.
The flashing process has the function of self-protection to expel air and reduce metal oxidation. Upsetting can also discharge oxides out of the weld with liquid metal. There are few defects such as weld inclusions and insufficient penetration.
The flashing process has a strong self-adjusting function, lower requirements for maintaining strict specification consistency, and stable welding quality. The unit welding cross-sectional area needs small electric power, and welding low carbon steel only needs (0.1-0.3) KVA / mm2 electric power.
Welding productivity is high, welding a joint takes only a few seconds to tens of seconds.
