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Welding & Cutting

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TIG Welding

PROCESS DESCRIPTION

TIG welding is suitable for all metallic materials. With TIG welding the arc burns between the component and a non-melting tungsten electrode. The filler metal is added separately, either manually or mechanically. The shielding gas has the task of protecting the electrode and melt pool from negative influences from the atmosphere. Oxygen, especially, leads to destruction of the electrode.  The process can be run using either direct or alternating current. Direct current with negatively poled electrodes is usually used for welding of steels, copper, nickel alloys, titanium and zirconium. Alternating current is used for aluminium.

 

MESSER SOLUTION

Messer supplies shielding gases for TIG welding.  With high-alloy steels and materials of a Ni basis, a small proportion (2 % to 7.5 %) of hydrogen can be added as a reducing component. Depending on the thickness of the component, an addition of helium (up to 90%) has proven suitable for light metals and copper.  

Advantages:

  • High process safety
  • Very good joint strength  
  • High quality weld surface  
  • Cost efficient welding process
  • Suitable for all welding positions