Direct current welding

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As a DC welding is welding using direct current (as opposed to AC welding ), respectively. Weldable materials for this process include steels, stainless steels and special materials such as titanium, zirconium and nickel.

Direct current welding is usually carried out with a negatively polarized tungsten electrode ( tungsten inert gas welding , TIG / TIG welding for short).

As the electrons flow from the electrode to the workpiece, the higher temperatures are created on the workpiece and the lower temperatures are created at the arc attachment point of the tungsten electrode. The tungsten electrode can therefore be ground to a point, whereby the arc burns stably and can be guided better during welding . The melting zone (the penetration) is narrow and deep.