MIG/MAG stainless steel welding
This is an automatic gas shielded arc stainless steel welding method. In this method, the arc is stably heated between the current carrier wire and the workpiece under the shield of the shielding gas, and the wire fed by the machine acts as an electrode and melts under its own arc. Due to the versatility and specificity of the MIG/MAG welding method, it is still the most widely used welding method in the world, suitable for stainless steel, steel, non-alloy steel, low alloy steel and high alloy-based materials. This makes it an ideal welding method for production and restoration. When welding steel, MAG can meet the requirements of thin gauge steel plates only 0.6mm thick. The protective gas used here is a reactive gas such as carbon dioxide or a mixed gas.
MIG stainless steel welding points and precautions:
(1) Use a flat characteristic welding power supply, and use reverse polarity for DC(welding wire connected to the positive pole).
(2) Generally, pure argon (purity 99.99%) or Ar+2%O2 is used, and the flow rate is preferably 20~25L/min.
(3) Arc length: MIG stainless steel welding is generally performed under the condition of spray transition, and the voltage should be adjusted to an arc length of 4~6mm.
(4) Windproof: MIG stainless steel welding is easily affected by the wind, and sometimes there are air holes caused by the breeze, so windproof measures should be taken in places where the wind speed is above 0.5m/sec.
(5) Moisture-proof: When welding outdoors, the workpiece must be protected from moisture to maintain the protective effect of the gas.
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