Tungsten Electrode and Rare Earth Tungsten Electrode
- Details
- Category: Tungsten Information
- Published on Tuesday, 19 January 2016 17:35
The tip color of tungsten electrode is green. It has small vapor pressure, low resistance, good conductivity, low thermal expansion coefficient, good elastic modulus and other good performance.
The tip color of cerium tungsten electrode is gray. It has a non-radiation, low melting rate, long welding life, good arc resistance and other good properties. Cerium tungsten electrodes at low current arc has good performance, mainly used in low-current DC welding.
The tip colors of lanthanum tungsten electrodes according to doping amount different are different, when lanthanum oxide (La2O3) doping amount is 0.80%~1.20%, tip color is black. When doping amount is 1.30%~1.70%, tip color is golden yellow. When doping amount is 1.80%~2.20%, tip color is the sky blue. It has good mechanical cutting performance, creep resistance, high ductility high recrystallization temperature and other good performance. Lanthanum tungsten electrodes is an internationally popular electrode material.
Tip color of thorium tungsten electrode is also depending on the doping amount of thorium oxide. And the generally tip colors of thorium tungsten electrodes are yellow (0.90 to 1.20%), red (1.8 to 2.2%), purple (2.80 ~ 3.20%) and orange (3.80 ~ 4.20%). It has low electronic features high recrystallization temperature, good electrical conductivity and cutting performance, often used in DC spot welding fields. Although thorium tungsten electrodes have excellent welding performance and easy to operate, however because of a certain radiation so it gradually be replaced by other rare earth electrodes.
Zirconium tungsten electrode tip color is usually brown and white. When ZrO2 doping amount is 0.02% ~ 0.40%, tip color painted head is brown. When doping amount is 0.07% ~ 0.09 %, its tip color is white. Zirconium tungsten electrode and tungsten electrodes can only carry out welding work in the AC environment and it has good corrosion resistance and weldability.
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