Lanthanum oxide doped tungsten electrode
Lanthanum oxide doped tungsten electrode is an electrode for arc welding that has improved startability and service life due to lanthanum oxides.
Physicochemical mechanism of action
The lanthanum oxides in the tungsten electrode ensure better electrolysis of the steel. They reduce the ignition voltage and improve the melting rate by stabilizing the electrolyte system.
Metallurgical relevance & risks during welding
This electrode leads to a finer ignited start and a homogeneous melting process. It reduces the number of pores and improves the mechanical properties of the weld. However, a lack or overdose of lanthanum oxides can lead to irregular ignitions or too rapid cooling, resulting in cracks or missing fusion zones.
Workshop practice & instructions
Use the electrode for arc welding of steels with high carbon content. Ensure that the lanthanum oxide-doped tungsten electrode is used correctly and the electrolyte system is regularly maintained. An optimal service life is typically 20-30 minutes.