Le 20 septembre 2016, 03:55 dans Humeurs • 0
There are a few main differences between HF Welding Machine carbon steel and stainless steel.
o Stainless steel requires a high percentage of Argon in the shielding gas mixture.
o The welding wire or electrode needs to be very close to the composition of the base metal.
o The transfer of the wire must be either globular or spray transfer.
o Finally the liner needs to be kept as straight as possible when welding.
The high percentage of Argon in the gas mixture is needed because stainless steel does not react well with oxygen or carbon dioxide gasses. In my experience the most common gas mixture I used is C2 and that is 98% Argon and 2% Carbon Dioxide. Other mixtures use a small amount of Oxygen added to the Argon. Even though Oxygen is what causes weld defects, in small percentages it helps the arc.
The welding wire chosen should be the same type as the base metal to be welded. The best way to choose a wire or electrode is to always consult with a welding supply store. Let's face it stainless steel is not cheap, so why take the chance!
When setting the MIG welder the transfer type should be globular or spray transfer. The high percentage of Argon gas also helps the arc to obtain this type transfer. I have found globular works best with thinner metal and true spray transfer is better for thicker metal. But others may disagree. It comes down to personal preference and welding style.
Finally, that nasty liner when it comes to MIG welding stainless steel! When welding the liner must be in top condition and be kept as straight as possible. Most of the trouble when welding comes from the liner and the friction caused by the stiffness of the wire passing through it. The most common troubles caused by the liner are fused MIG tips and the creation of a birds nest. A bird's nest is a result of the welding HF Tarpaulin Welding Machine wire not being able to be pushed into the cord, and since the wire has no place to go, it coils up, resembling a bird's nest.