Types of Argon Arc Welding：
Based on electrode classification, argon arc welding is divided into non-consumable electrode argon arc welding (Tungsten Inert Gas, TIG) and consumable electrode argon arc welding (Metal Inert Gas, MIG/MAG).
1.Non-Consumable Electrode Argon Arc Welding (TIG)
In TIG welding, an electric arc is established between a non-consumable tungsten electrode and the workpiece. A chemically inert shielding gas (typically argon) flows around the arc zone, forming a protective envelope that isolates the tungsten tip, arc, molten pool, and high-temperature metal from atmospheric contamination. This prevents oxidation and absorption of harmful gases, ensuring a dense weld joint with exceptional mechanical properties.
2.Consumable Electrode Argon Arc Welding (MIG/MAG)
In this process, a continuously fed wire electrode passes through a contact tip, generating an arc between the wire and the workpiece. Both the wire and base metal melt under the protection of inert argon gas. Key distinctions from TIG welding include:The wire electrode melts into the weld pool, solidifying to form the joint.The tungsten electrode in TIG remains non-consumable, relying solely on shielding gas for protection.
With technological advancements, shielding gases have evolved from pure argon to optimized gas mixtures, such as Ar (80%) + CO₂ (20%) and Ar (97%) + CO₂ (3%), categorized as MIG (Metal Inert Gas) for argon-rich blends and MAG (Metal Active Gas) for mixtures with reactive components. Currently, semi-automatic MIG/MAG welding and argon-rich hybrid gas shielded welding dominate industrial applications, followed by automated MIG systems.
