Introduction to the advantages and disadvantages of tungsten arc welding

Tungsten argon arc welding this welding method due to the arc is burned in the argon gas, so it has the following advantages and disadvantages:
(1) argon has an excellent protective effect, can effectively isolate the surrounding air; it itself is neither a chemical reaction with the metal, nor dissolved in metal, so that the welding process of the metallurgical reaction is simple and easy to control, and therefore obtain a high quality of the weld to provide good conditions.
(2) The tungsten arc is very stable, even in the case of small current (<10A) can still be stable combustion, especially for thin plate material welding.
(3) The heat source and filler wire can be controlled separately, and thus the heat input can be easily adjusted so that this welding method can be used for all-round welding, and it is also an ideal method for realizing one-sided welding and two-sided forming.
(4) because the filler wire does not pass the current, it does not produce spatter, weld molding beautiful.
(5) AC TIG welding in the welding process can automatically remove the role of the oxide film on the surface of the weldment, therefore, can successfully weld some chemically active non-ferrous metals, such as aluminum, magnesium and alloys.
(6) tungsten electrode bearing current capacity is poor, too large a current will cause tungsten electrode melting and evaporation, and its particles may enter the molten pool and cause tungsten entrapment. Therefore, the melting speed is small, the melting depth is shallow, and the productivity is low.
(7) the use of argon is more expensive, low deposition rate, and argon arc welding machine has a more complex, and other welding methods (such as electrode arc welding, submerged arc welding, CO2&shy; gas shielded welding) compared to the production cost is higher.
(8) argon arc around the greater impact of airflow, not easy to work outdoors