How To Get Color When Tig Welding

One the weld puddle appears dirty.

How to get color when tig welding. A good-looking weld is clean and is the same color as the base metal both inside and out-. Even if you cleaned it. March 24 2015 By.

Contaminants get into the fabric of the metal. If you were to use a really large tig nozzle things would improve. That is why gas welding steel with an oxyfuel torch looks so gray all over.

Tungsten electrode contamination is another common pitfall that can occur during TIG welding. The color chart and acceptance criteria for titanium welding are established. It is just a matter of the argon shielding envelope leaving the hot metal before it has a chance to cool enough to not oxidize.

After welding finished the welding quality can be evaluated by visually checking the discoloration of welding surface. You can get the lower heat input when you reduce the amperage and voltage. TIG welds with a range of colors are usually made on steel.

Also just to make a comparison. The color forms due to the contact of the weld pool of metal with oxygen. TIG welding copper and copper nickel alloys are typically done with pure Argon and sometimes Argon Helium 75 Ar 25 He gas mixture.

Color in a weld is a sign of oxide. The moment you see the weld pool changing color to red nearing blue stop and use post flow. Due to overheating of metal tig welding becomes grey or dull in color and that also degrades its corrosion resistance and mechanical properties also.