Arc welding is the most widely used welding methods . It includes : manual arc welding , submerged arc welding , gas tungsten arc welding , plasma arc welding , MIG welding and so on.
Most electric arc between the electrode and the workpiece is burning arc as a heat source . In the formation of joints, may or may not use filler metal . The electrode used in the welding process molten welding wire , known as MIG arc welding , such as Tungsten Welding Electrode , submerged arc welding , gas-shielded arc welding , electric arc welding cored wire ; electrode used in the welding process does not melt the carbide or tungsten rod when called does not melt arc welding , such as gas tungsten arc welding , plasma arc welding and so on.