Carbon dioxide gas shielded welding is a kind of consumable gas shielded welding. It uses carbon dioxide as a shielding gas and relies on the arc generated between the welding wire and the weldment to melt the metal and realize welding. Carbon dioxide gas is cheap, and the current density is high during welding, and the arc heat utilization rate is high. There is no need to clean slag after welding, the weldment has small deformation, good crack resistance, easy control, convenient operation, and easy to realize automation and mechanized production. However, since carbon dioxide gas will decompose at high temperature and the arc atmosphere has strong oxidizing properties, which leads to overburning of alloy elements, it cannot weld non-ferrous metals and high-alloy materials.
