Friday, May 10, 2019

Tips For Tig Welding Aluminum

By Gregory Davis


A very versatile metal that is being used today is aluminum. Industries including aerospace, automotive, transportation, and construction have been using this metal in various ways for decades. The properties of being both strong and light weight make it a very desirable choice. Add in the fact that it is corrosion resistant makes it more versatile than steel and iron for different uses. Unfortunately, tig welding aluminum has a reputation for being difficult. A few tips can overcome the difficulties making it a favorite.

Being lightweight and strong makes it a great metal to create products. Since it is lightweight the aerospace industry has been using it in airplanes for decades to make the craft lighter. Some vehicle manufacturers have even begun using it for heavy-duty trucks. In the past, steel was the go-to metal for all work that needed to withstand rough environments, but this has been changing over time.

Using AC current is better than using DC current for aluminum welding projects. Since it has an oxide component, using the AC current allows the clean removal of this during the process. DC does not make this happen. Newer equipment usually has controls that allow you to fine-tune the current to factor in the thickness of the metal, the type of weld, and other needs to create the perfect weld.

The type of tungsten rod does matter. Some of the older style rods include very toxic chemicals. Some actually produce radioactivity. The rare-earth rods are made with more pure materials and have a better reputation for cleaner welds. This isn't just for one metal, but a good suggestion for all welding in general. These rods are usually a blue-tint.

The angle matters. When creating a weld on this metal, it is important to use a fifteen-degree angle during the work. This angle gives optimum performance and bead. The angle also allows the metal to push through as you move along the new weld. It can also help prevent pooling.

Stop welding when a pool develops. Steel and iron are metals that are easier to work through a pool. It may not be very pretty, but it is not devastating. Aluminum does not recover from pooling well. Pushing through is not the best option since the pool will only get worse. It is best to stop working and wait a bit before starting up again, otherwise, a hole may develop.

The best gas to use is argon. It is the choice of the majority of the industry for typical work. Helium has been suggested but it usually burns too hot for normal applications. Using argon produces enough heat and is also more forgiving. The high heat of helium can cause damage and project devastation very quickly if not properly controlled.

Working with different types of metals can be a bit of a challenge. With some adjustments, beginners can easily learn the best methods for each one. Taking the time to practice before starting any project is suggested. Learn how the metal reacts and what the best practices are in order to make the best welds.




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