Wolframelektrodi

Wolframelektrodi, often referred to as a tungsten electrode, is a non-consumable electrode primarily used in arc welding processes, most notably in Gas Tungsten Arc Welding (GTAW), also known as TIG welding. These electrodes are made from tungsten, a refractory metal with a very high melting point, which makes it ideal for withstanding the intense heat of an electric arc. The tungsten electrode does not melt and transfer metal into the weld pool; instead, it carries the welding current and generates the arc that melts the filler metal and the base material.

Tungsten electrodes are available in various compositions, often alloyed with small amounts of other elements to improve their performance. Common alloying elements include thoria (thorium oxide), ceria (cerium oxide), lanthana (lanthanum oxide), and zirconia (zirconium oxide). Each of these additives imparts specific characteristics to the electrode, such as arc stability, ease of ignition, and electrode tip life. The selection of the correct electrode type depends on the welding process, the material being welded, the type of current used (AC or DC), and the desired weld quality. The tip of the tungsten electrode is typically ground to a specific shape, such as a point or a ball, to optimize arc characteristics.