(1) Because of the large heat affected zone, the argon arc welding often causes deformation, hardness reduction, blisters, local annealing, cracking, pinholes, abrasion, scratches, undercuts, or insufficient bonding force and internal stress after repairing.
Shortcomings such as damage. Especially in the repair process of fine defects of precision casting parts, the surface is prominent. In the field of repairing precision casting defects, a cold welder can be used instead of argon arc welding. Because of the low heat release of the cold welder, the shortcomings of argon arc welding are better overcome, and the repair problem of precision castings is compensated.
(2) Compared with electrode arc welding, argon arc welding has a higher degree of damage to the human body. The current density of argon arc welding is large, and the emitted light is relatively strong. The ultraviolet radiation generated by its arc is about ordinary electrode arc welding. 5 to 30 times, the infrared ray is about 1 to 1.5 times that of the electrode arc welding, and the ozone content generated during welding is high.
Therefore, the place where the air circulation is better is selected as much as possible, otherwise the body is greatly damaged. Application of argon arc welding: Argon arc welding is suitable for welding non-ferrous metals and alloy steels that are easily oxidized (currently mainly used for welding Al, Mg, Ti and their alloys and stainless steel); suitable for double-sided forming of single-sided welding, such as primer Welding and tube welding; tungsten argon arc welding is also suitable for thin plate welding.