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TIG Welding Aluminum

14 June, 22 1:57 am · Leave a comment · reddarc2
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TIG Welding Aluminum

Tungsten Inert Gas (TIG) welding—more formally known as Gas Tungsten Arc Welding (GTAW)—is well-suited for welding aluminum. Although the process is significantly slower than GMAW (MIG), TIG welding offers unmatched control of weld penetration and profile. This level of control is enhanced by the features available on modern TIG welders.

Preparing to Weld

Even with modern equipment, welding aluminum is very much like painting: preparation is key. The cause of a lot of headaches when TIG welding aluminum is related to aluminum oxide. This protective oxide layer has benefits for parts in service but must be removed from around the weld joint by using a stainless-steel wire brush—one dedicated to aluminum only—prior to welding. If not removed, the oxide layer may limit weld fusion and overall control in the welding process. 

The aluminum oxide layer is also well-suited to trapping and retaining moisture that becomes a source of weld metal porosity. For this reason, preventing condensation formation on both the base metal and filler metal is also critical to achieving good quality. At the very least, allow filler metal and base metal to thermally acclimate to the welding environment before use. Consult with filler metal manufacturers to learn more tips about how to combat porosity when welding aluminum.

“The aluminum oxide layer is also well-suited to trapping and retaining moisture that becomes a source of weld metal porosity.”

Pure tungsten electrodes were once the industry standard for TIG welding aluminum since these electrodes formed a nice “balled” tip that performed well when using alternating current on older transformer-based equipment. However, ceriated tungsten electrodes have become the norm with newer inverter-based power sources. Preparing ceriated tungsten for welding aluminum involves simply grinding the end of tungsten to a point at a 60-degree angle, give or take depending on the desired arc cone.

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The benefits of using an engine-driven welder generator

14 June, 22 1:36 am · Leave a comment · reddarc2
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The benefits of using an engine driven welder generator

When it is tough to bring the workpiece to a source of power, it is often necessary to bring the power source to the workpiece. By combining the capability of a welding power source with the functionality of a portable generator, the engine-driven welder generator often becomes one of the most versatile pieces of equipment on the jobsite.

Engine-driven welder generator rentals power all sorts of job sites. The “mobile welding rig”—a work truck outfitted with an “engine drive” welder— is a common sight alongside the spans of onshore pipelines, heavy equipment in need of repair, or structural and bridge construction sites. Of course, equipment trailers are a popular accessory for those who need to free up bed space.

A vast array of equipment power plants and feature sets ensure that both the home hobbyist and professional welding outfit can access the power and processes they need in the field. A home hobbyist unit may start out having a gasoline engine providing a 4.5 kW single-phase maximum output while some of the largest dual-operator units are diesel-powered and offer maximum three-phase outputs of approximately 25 kW.

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Induction Heating Applications for Welding and Industrial Maintenance

14 June, 22 12:58 am · Leave a comment · reddarc2
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Induction Heating Applications for Welding and Industrial Maintenance

Induction heating is a modern approach to supporting the welding process with preheat and post-weld heat treatment (PWHT) as well as other industrial tasks such as coating removal and placing or removing shrink-fit components. Although the conventional use of induction heating is limited to magnetic base materials, applications capable of using the process can reap significant operational savings and benefits compared to “conventional” heating processes such as flame/torch or even resistive heating. Could you be a good candidate for implementing induction heating into your welding or industrial maintenance processes? Shown here are just a few target use cases.

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Airgas, an Air Liquide company, is the nation's leading single-source supplier of gases, welding and safety products. Known locally nationwide, our distribution network serves more than one million customers of all sizes with a broad offering of top-quality products and unmatched expertise.