Tungsten Inert Gas Welding (TIG welding) is an arc welding method that utilizes inert gas protection. Its core principle is to generate a high-temperature arc through a non-molten tungsten electrode, and use the arc heat to locally heat the workpiece to a melted state, thereby realizing the connection of metals.
Specifically, during welding, the welding power supply supplies current to the tungsten electrode, forming an arc between the electrode and the workpiece being welded. This arc has an extremely high temperature and can quickly heat the workpiece metal, causing it to melt and form a melt pool. On the outside of the welding area, inert gas such as argon is sprayed to form a protective gas shield, which isolates oxygen and nitrogen in the air, avoids oxidation and nitriding reactions in the welding area, and ensures the purity and excellent mechanical properties of the weld metal.
As a non-consumable electrode, the tungsten electrode will not melt during the welding process, and can maintain the stability and continuity of the arc. Welders can choose to apply filler metal manually or automatically according to welding needs to achieve the formation of welded joints.
The principle of argon arc welding combines the three elements of arc heat source, high-temperature melting and inert gas protection to ensure the safety, stability and high quality of the weld seam, and is widely used in aerospace, shipbuilding, pipelines, automobiles and precision manufacturing and other fields.
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