The most common lanthanum tungsten electrode contains lanthanum dioxide (La203), known as lanthanum oxide. In Europe and Japan, lanthanum tungsten electrodes have been the most commonly used alternative to thorium tungsten electrodes in most applications. There are three kinds: lanthanum oxide, lanthanum oxide 1.5% and lanthanum oxide 1%. Lanthanum trioxide has the lowest electronic escape work, the easiest to start the arc, the lowest point temperature, which helps to prevent grain growth and improve the service life. By testing the lanthanum tungsten electrode, which contains 2 percent lanthanum, it shows that if there is no overload current, the life expectancy is longer than thorium tungsten, which is easier to start in most USES.
Content is 1.5% (2.0% difference) and content of lanthanum tungsten electrode has the most close to 2.0% of thorium tungsten electrode conductivity, therefore, can easily replace electrode welding personnel, without change of the parameters of the equipment.
In 1998 there was a very famous site test, will be 2.0% thorium-tungsten electrode, 2.0% cerium tungsten electrode and 1.5% lanthanum tungsten electrodes respectively in 70 and 150 current and 300 v direct current welding task environment, as a result, in both cases, 1.5% lanthanum tungsten electrodes, showed its excellent welding performance, but also reflected the characteristics of its burn rate of small. Lanthanum tungsten electrode is also suitable for ac welding and excellent performance.
Lanthanated tungsten electrode manufacturing method, involves a is mainly used for TIG (tungsten inert gas) welding and PLASMA (PLASMA) technology, metal welding, cutting, spraying, smelting methods of making a kind of tungsten electrodes.
