Dynamic Fabrication is a custom metal fabrication company based in Orange County, California. We take pride in our flawless TIG welds, precision machining, metal fabrication, and quick turn around. We have extensive background in stainless steel, mild steel, and aluminum. We also work with other metals such as copper, brass and titanium.
TIG Welding Overview
In TIG welding, a non-consumable tungsten electrode is used to provide an electric arc for welding. A sheath of inert gas surrounds the electrode, the arc, and the area to be welded. This gas shielding process prevents any oxidization of the weld and allows for the production of neat, clean welds. TIG welding differs from MIG (metal inert gas) welding in that the electrode is not consumed in the weld. In the MIG welding process the electrode is continuously melted and is added into the weld. In TIG welding, no metal is added.
TIG welding can be used to weld copper, titanium, and even two dissimilar metals. TIG welding is handy for tricky welds (such as curves, or welds on round things). TIG welding generates heat via an arc of electricity jumping from an (tungsten metal) electrode to the metal surface. TIG stands for Tungsten Inert Gas, after the tungsten electrode, and the sheath of inert gas (argon or an argon mixture) surrounding it.
TIG Welding Technique Basics
TIG welding techniques are simple but require skill. A clean joint is a must. Clean Tungsten is also a must. When TIG welding it is essential to have a clean weld joint and clean Tungsten. These rules even apply to a joint that was cleaned and has one weld pass, but the color has changed. The best solution is filing down the weld area to clean metal before welding another pass.
To start an arc either bump the Tungsten or scratch it. All you need is a puddle to form and then add filler wire to the joint. It does not matter if you go forehand or backhand. TIG is all about washing the weld into the metal. As for positions, it does not matter if you are welding flat or overhead, the metal always flows in the same way.
The main difference in TIG welding techniques comes from the equipment used. If you use a basic TIG set-up you need to move faster as the weld becomes fluid. If you have a foot pedal, ease off the amperage to compensate for overheating the metal. TIG welding is a powerful fabrication tool. It is possible to make beautiful welds more quickly than with oxy-acetylene welding.
TIG Welding Various Metals
TIG welding can be performed with a large variety of metals. The two most common are steel and aluminum. Steel is relatively easy to TIG weld, producing very tight, neat welds. Aluminum takes more experience. However, the basic technique is essentially the same and most people can make the jump to aluminum fairly easily.
TIG welding is a versatile welding process. When it comes to welding exotic metals no other welding process can do the job as well. TIG welding is perfect for a variety of metals. TIG is typically used for welding pipes and pressure vessels in nuclear power plants and shipyards because of its controllability. The high degree of controllability with TIG welding a higher quality weld than with any other commonly used method available today. Some of the metals that are commonly TIG welded are:
- Mild Steel
- Stainless Steel
- Copper Nickel
- TIG welding can weld many more metals and alloys.
- TIG welding can also weld many dissimilar metals together.