What gas should be used in the use of stainless steel wire for nitrogen dioxide gas shielded welding?
Different types of welding wire are suitable for different protection gases. At present, there are pure argon gas market, but also mixed gas protection, but also pure CO2 gas protection.Look at the wire you bought, which manufacturer, a phone call in the past, people will tell you.
In order to obtain good mechanical properties of welding seam, Ar+2% oxygen is recommended to protect MIG welding gas, and the gas flow is protected by 20~25L/min
When using stainless steel wires, argon is used as a protective gas. You can also use a mixture of 95% argon and 5% carbon dioxide as a protective gas. Because the cooling effect of the welding torch is not good when using pure argon, the nozzle and nozzle are easy to red and burn. Add some carbon dioxide gas, will play a cooling effect.
