EWM WEGA 401 User Manual download pdf (Page 30)

With regard to the materials to be used, wall thicknesses and welding positions, TIG

welding is a universal welding process. It makes it possible to

produce welded joints of the highest quality.

TIG cold wire welding was developed firstly with the aim of making TIG welding easier and

more convenient to use and secondly to increase the welding speed. In this process, the

welding consumable is fed to the weld pool by a wire feed unit. Deposition rates, however,

remain limited.

TIG hot wire welding

is a further development of TIG cold wire welding. The consumable is

TIG hot wire - explanation of the process

Hot wire weldingHot wire welding

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2010 EWM HIGHTEC WELDING

TIG hot wire welding

is a further development of TIG cold wire welding. The consumable is

heated by a separate power source using resistance heating of the wire stick-out between

the contact tip of the hot wire torch and the molten pool. There are several advantages over

the cold wire process due to the improved heat balance provided by this process:

- Up to 100% faster welding speed

- Up to 60% improvement in deposition rate

- Dilution reduced by up to 60%

- Greater fusion volume (30-50%) with the same welding performance

- Easier positional welding

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EWM WEGA 401 User Manual Page 30