Argon arc welding uses argon or helium for the inner layer, and carbon dioxide for the outer layer
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I heard in the group discussions that for welding equipment, argon or helium is used for the inner layer while carbon dioxide is used for the outer layer. What types of welding are such devices used for, and what is their welding efficiency like?
In TIG welding, “argon” refers to the fact that the shielding gas is argon； For welding plates with thick thicknesses, high penetration is required; or a mixture of argon and helium is used when increasing the welding speed. Using carbon dioxide as a shielding gas is what we call gas shielded welding; this method is efficient for welding, but the quality of the welds is poor, so it is rarely used in pressure vessels.
MIG welding is primarily used for carburization; initially, it could not be applied to pressure vessels. Later, improvements were made to the process and flux-coated welding wires were used to reduce carbon content, which effectively lowered its level. This method is now being used in some pressure vessels. ----------------------------------- What is mentioned here is a new process that utilizes argon as an inner shielding gas and carbon dioxide as an outer shielding gas, though the specifics of this process are not clear
What are the advantages of this process – reducing the amount of argon used?
It’s not clear either – is it cooling? ? ? ? ?
Boss Yu, have you seen German MIG-MAG welding used as a base weld in place of TIG?
I don’t know. I heard people say so, that’s why I’m asking. Could you give me some information?