Tungsten Electrode

Tungsten Electrode

Tungsten Inert Gas welding(TIG) or Gas Tungsten Arc welding(GTA W) uses a nonconsumable tungsten electrode which must be shielded with an inert gas,The arc is initiated between the tip of the electrode and work to melt the metal being welded,as well as the filler metal,when used. A gas shield protects the electrode and the molten weld pool,and provides the required arc characteristics.

The process may employ direct current with positive or negative electrode or alternating current.In general,AC is preferred for welding aluminum and magnesium.Direct current electrode negative is preferred for welding most other materials and for automatic welding of thick aluminum.Thin magnesium Sometimes is welded with direct current electrode positive.

Gas tungsten arc welding is generally more expensive than SMAW due to the inert gas,and is only 10to20 percent as fast as GMAW.However,GTAW will provide the highest quality root pass,while accommodating a wider range of thicknsses,positions,and geometries than either SMAW or GMAW.

Type Model Added Imprrity Impurity Quantity Other Impurities Colors Sign
Thoriated Tungsten WT10 ThO2 0.9-1.2 <0.20 Yellow
WT20 ThO2 1.8-2.2 <0.20 Red
WT30 ThO2 2.8-3.2 <0.20 Purple
WT40 ThO2 3.8-4.2 <0.20 Orange
Cerium Tungsten WC20 CeO2 1.8-2.2 <0.20 Grey
Lanthanated Tungsten WL10 La2O3 0.8-1.2 <0.20 Black
WL15 La2O3 1.3-1.7 <0.20 Golden yellow
WL20 La2O3 1.8-2.2 <0.20 Sky blue
Pure Tungsten WP Colors Electric Discharged Power: 4.5 <0.10 Green
Product Information: TIG:1.0-12mm
Length: 50mm,75mm,150mm,175mm
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