The arc of the electric fusion weld melts the metal and the filler material without the need for pressurization, and the filler metal portion is entirely from the electrode.
Electric resistance welding often uses a large current. In order to prevent arcing on the contact surface and to forge the weld metal, pressure is always applied during the welding process.
Welding is achieved by the following three ways:
1. Fusion welding - Heating the workpiece to be joined to partially melt it to form a molten pool. After the molten pool is cooled and solidified, it is joined. If necessary, it can be added to the filler. It is suitable for welding of various metals and alloys. pressure.
2. pressure welding - Welding process must apply pressure to the weldment, belonging to the processing of various metal materials and some metal materials.
3. Brazing - The metal material with lower melting point than the base material is used as the brazing material, the base material is wetted by the liquid brazing material, the joint gap is filled, and the base material is mutually diffused to realize the link weldment. Suitable for welding of various materials, also suitable for welding of different metals or different materials.