Why does argon arc welding stainless steel wire have pores?

The steam hole in your sub-arc welding is mainly caused by the following problems: the gas purity is not enough, the regulating valve is too small, the gas supply is insufficient, the gas supply pipeline is damaged, and gas leakage is also a cause of insufficient gas supply. The air convection at the welding site is too strong, so the wind is strong. If there is a crack in the tail handle of the welding gun, it will also leak air and cause blowholes during welding. The weld is not clean and contains impurities. Teacher on the second floor, please read the landlord's question before you answer. Don't pretend to understand if you don't understand. Your master taught you to use carbon dioxide gas for sub-arc welding, and also talked about some technical problems of secondary welding. I think your secondary welding is also amateur. I hope we can exchange more welding experience. I haven't been in this business for long, that is, fifteen or sixteen years. A small high-pressure welder with a monthly salary of less than 10 thousand. I hope you don't laugh.