Argon arc welding tungsten needle is more often known as argon arc welding tungsten electrode. And such a needle may be a thoriated tungsten electrode, a cerium tungsten electrode, or a lanthanated tungsten electrode, etc.
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Automatic argon-arc welding is used for welding thin stainless steel, aluminium and its alloys. The argon-arc process may use either non-consumable or consumable electrodes. With a non-consumable electrode, the arc is maintained between a tungsten electrode and the workpiece. A shield of argon is projected around the electrode. In other words, the arc burns between a tungsten electrode and the workpiece within a shield of the inert gas argon, which excludes the atmosphere and prevents contamination of electrode and molten metal. The hot tungsten arc ionizes argon atoms within the shield to form a gas plasma consisting of almost equal numbers of free electrons. Argon arc welding tungsten needle is generally used for alternating current (A.C.).
