NEWS
CYCLING THROUGH THE ADVANTAGES
H
aving both positive and negative cycles, an alternating current, (AC) GTAW is ideal for high-quality
aluminium welds. The positive cycle has a scrubbing effect on the metal surface, removing oxides that negatively impact weld quality, whereas the negative cycle allows a deeper weld penetration. AC GTAW aluminium and magnesium
welding is widely used within shipyards, cryogenics and aerospace applications for seam welding in shipbuilding, aluminium pipe GTAW welding and automotive work. Why is an AC current the preferred process to
use in GTAW aluminium welding? The unique properties of an AC current provide better arc stability and oxide layer management,
along with control over heat input, when compared to using a DC current. This results in a significantly higher quality, consistent weld and makes it the preferred choice for aluminium welding applications. Recently launched by Lincoln Electric, the
newly developed Square Wave 400 ADV is the ultimate solution for industrial TIG AC welding applications combining power and precision welding, offering excellent processes and high performance, thus increasing productivity. The new Square Wave is designed with the latest energy-saving technology and is ready to work in the most difficult environments, due to its unique design. To achieve excellent welding results, Square
Wave 400 ADV uses both digital and built-in communication systems and devices such as the USB port, making it easy to monitor and track welding operations. Simple automation interface (A1) makes it a complete product for most demanding applications. Effortless arc control - Extremely fast arc
response and stability for the smoothest and most efficient weld possible. Simplicity when you want it - AUTO setup
technology to automatically provide for softer starts and minimal distortion on thinner materials and hotter starts required for thicker materials. The AC AUTO Balance
8 / WELDING WORLD MAGAZINE - ISSUE 01 - JANUARY 2025
technology offers simplicity by automatically providing the optimal mix of cleaning and penetration when welding aluminium. Customisation when you need it - AC Wave
Shape control enables you to customise the arc for critical aluminium welding producing:
• A higher degree of penetration on thicker materials
• Increased cleaning action in breaking through heavy oxide layers
• Narrower arc profile, enhancing control around corners
See more HERE…
www.lincolnelectric.eu
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