a) Check whether the bottle valve is fully opened. If it is fully opened, it means that the argon in the bottle is insufficient and the bottle needs to be replaced.;
b) Readjust the protective gas flow;
c) Check whether there is air leakage in the air supply pipe;
d) When welding carbon steel, the purity of argon shall not be less than 99.7%, when welding aluminum, it shall not be less than 99.9%, and the purity of argon used for welding titanium and titanium alloy shall be as high as 99.99%.;
b) During operation, when argon arc welding gun with control button is used, gas shall be released before welding.
5. Welding process problems
a) Adjust proper welding speed;
b) During arc extinguishing, the arc extinguishing method of reducing current or adding welding wire, bringing the arc to the groove side and lowering the arc shall be adopted. Do not stop the arc suddenly, which will cause the high-temperature
molten pool to be separated from the effective protection of argon gas flow, and avoid the occurrence of pores or shrinkage cavities in the arc pit.
c) Adjust the welding current to appropriate parameters. If the welding current is too small, the arc is unstable, the arc drift at the end of the tungsten electrode is unstable, damaging the protection zone, and the welding current is too large, the arc
disturbs the air flow, and the protection effect becomes worse.