For applications involving the use of filler wires two approaches are available – the cold wire and the hot wire process. A cold-wire feed increases productivity: The welding speed increases and the filler metal is fed precisely and evenly to the weld pool. This allows even less-experienced welders to achieve outstanding results. The process is widely used in the field of pressure vessel fabrication and shipbuilding. TIG hot-wire welding was developed from cold wire TIG welding. In TIG hot-wire welding, the filler metal is heated. The advantages include – deposition amount and rate increase, rise in the welding speed and reduction in fusion
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