Welding technology is mainly used in the base metal, commonly used welding method has submerged arc welding, TIG welding, laser welding, electroslag welding and other kinds. Plastic and other non-metallic materials can also be welded. There are more than 40 kinds of metal welding methods, mainly divided into fusion welding, pressure welding and brazing.
Fusion welding make the workpiece interface heated to melt state,without the pressure to complete the welding, when welding, heat source make the two workpiece interfaces melt to become molten pool rapidly. Molten pool will moved forward with the heat source, after cooling, they formed a continuous weld bead, two workpieces connected into one.
Pressure welding make workpieces achieve inter-atomic bonding in the solid state under pressure, also known as solid state welding. The common feature of the various pressure welding methods is put pressure,without applying the filler material during welding.
The brazing is use of metal material that lower than the melting point of the workpiece as solder, make the workpiece and solder melt to the temperature that above the melting point of the solder and below the melting point of the workpiece, use liquid solder to moist the workpiece, thereby achieve mutual diffusion between atoms.
