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A normal tungsten arc has a temperature of approximately 11 °C but the constricted arc of a plasma torch can reach 20 °C. The high-temperature ionized gas. Disclosed is a plasma arc welding torch suitable for welding materials of construction. The torch is characterized in that the head is divided into two. Small water-cooled and therefore high performance 50amps-micro plasma welding torch for welding with reverse polarity or straight polarity of the electrode.

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The main advantage of plasma welding lies in the control and quality produced in the part being welded. The torch design allows for better control of the arc. The molten weld metal solidifies behind the keyhole as the torch traverses the workpiece. Shielding of the weld pool is provided by the ionized plasma gas that. The plasma arc welding procedure is usually compared to the gas tungsten arc process. If an electric arc between a tungsten electrode and the work is.

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Accordingly, Marshall Space Flight Center (MSFC) initiated development of Variable Polarity Plasma Arc (VPPA) welding. The VPPA concept dates to The molten weld metal solidifies behind the keyhole as the torch traverses the workpiece. Shielding of the weld pool is provided by the ionized plasma gas that. A welding torch which combines features of both laser and plasma-arc welding torches. A laser beam is directed by an objective lens so that it is co-linear.