Non-molten arc welding: Non-molten arc welding: Mission principle: Non-melting (tungsten) electrode as the electrode, the workpiece as another electrode, the arc extinguished between the non-melting pole and the mission principle of the workpiece, making the welding consumables The parent metal is melted into a liquid to form a molten pool, and an inert gas is also added as an arc medium to maintain the arc and the welding zone.

Advantages: Argon gas maintenance, non-ferrous metals, stainless steel and various alloys that can be easily oxidized, nitrided, chemically vivid, etc. Advantages: Tungsten arc swinging to weld thin parts; controllable weld composition, no spatter, beautiful appearance .

Defects: The thickness of the weld is shallow, the deposition rate is low, and the consumption rate is low; the tungsten electrode bears a poor ability to carry the current, excessive current will cause the tungsten electrode to melt and evaporate from the defect, and the fine particles can enter the molten pool to form pollution. (Tungsten clamp); Inert gas (argon, helium) is more expensive, compared with other arc welding methods (such as hand arc welding, submerged arc welding, CO2 gas maintenance welding, etc.), and the cost of consumption is higher.