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A plasma is a gas which is heated to an extremely high temperature and ionized so that it becomes electrically conductive. Similar to GTAW (Tig), the plasma arc welding process uses this plasma to transfer an electric arc to a work piece. The metal to be welded is melted by the intense heat of the arc and fuses together. Plasma gases are normally argon. The torch also uses a secondary gas, argon, argon/hydrogen or helium which assists in shielding the molten weld puddle thus minimizing oxidation of the weld.
Plasma Arc Welding is Widely used in industrial production, especially aerospace and military and cutting-edge industrial technology used in copper and copper alloy, titanium and titanium alloy, alloy steel, stainless steel, molybdenum and other metal welding, such as titanium alloy missile shell, aircraft Some thin-walled containers and so on. Plasma Arc Welding is normally used to the 0.8 to 15mm thickness steel.