TIG welding (Gas Tungsten Arc Welding) in a pure Ar as the shielding gas tungsten as a welding electrode method. The straight strip supplier by TIG welding wire to a certain length (typically lm).

MIG welding i.e. protection of electric welding, metal inert gas such as Ar, inert gas as protective gas, including melting extremely pure Ar or Ar gas by mixing a small amount of reactive gas (such as less than 2% O2 or less than 5% of CO2 gas) electric arc welding method. The Mig Welding Wirescoiled layer around, or discoid supplier.

TIG and     Mig Electrodemethods due mainly to pure Ar as a protective gas, so the outside air, oxygen, nitrogen, hydrogen, and other harmful gases are difficult to enter the molten bath; argon gas or impurities does not produce harmful weld properties; the argon welding wire and molten pool the alloy oxidation few etc. welded joints have a very excellent physical and chemical properties. But it may be detrimental to the welding efficiency and weld penetration. So to the constituent of the wire as much as possible close to the base material ingredient as the principle of the choice of the wire is suitable.
TIG Welding Welding Precautions
1, protection of the gas flow requirements: when the welding current in the 100-200A between 7-12L/min;: when the welding current is between 200-300A for 12-15L/min suitable. Due to breakage of the feed pipe causing the protective gas is mixed with the wet air, the performance of the welded joint is influential; 2, tungsten projecting length relative to the nozzle should be as short as possible, the arc length to the arc length control in general 1-4mm quasi (welded carbon steel 2-4mm; welding of low alloy steel and stainless steel for 1-3mm); precautions when the wind speed is greater than 1.0m / s should be; attention to ventilation, to avoid injury to the operator welding; 4: strictly clear welding at the oil, rust, water impurities. 5: It is recommended that the steep drop of the external characteristics of DC power, tungsten is extremely positive. 6: In the more than 1.25% Cr low alloy steel welding, the back should also be protected.

MIG welding Notes
1, the shielding gas flow 20-25L/min appropriate; arc length is generally controlled at about 4-6mm; wind particularly adverse impact on the welding, precautions should be adopted when the wind speed is greater than 0.5m / s; attention to ventilation, to avoid injury to the operator; 4 using pulsed arc current, the spray arc stability, especially suitable for stainless steel, sheet metal, vertical welding, hardfacing welding; 5, Ar +2% O2 gas combination welding low carbon stainless steel, without applying Ar mixed with CO2 welding class steel; welding strict clear welded at the oil, rust, water impurities.