Advantages of the Tungsten Electrode Lanthanum

The most common tungsten electrodes comprising lanthanum dioxide percent lanthanum, lanthanum oxide is known. In Europe and Japan, lanthanum tungsten electrode in most applications has been most commonly used to replace thoriated tungsten electrodes. Containing 2% lanthanum oxide, lanthanum oxide, lanthanum oxide, 1.5% and 1%, three. Lanthanum oxide has the lowest electron work function, arcing easiest tip temperature minimum, which helps to prevent grain growth, improve service life. By testing 2% lanthanum lanthanum tungsten electrode showed that: If no overload current, longer life than thorium tungsten, in most use arcing easier. Especially good (a) to prevent thermal shock, (b) short cycle repeated ignition welding case, the welding good (c) to avoid contamination. In welding pipes, welders lanthanum tungsten electrodes, especially for such satisfaction. Because long life to reduce downtime. And, in general case, it is 1.5% of lanthanum oxide to lanthanum tungsten electrodes, low current arcing and can easily stabilize the low current arc. Lanthanum tungsten electrodes in a rare earth, and no radioactivity. The lanthanum tungsten electrode is mainly used for DC welding, welding in the exchange will have a good effect. 1.0% lanthanum oxide containing tungsten lanthanum cerium tungsten electrodes are simultaneously appear on the market.

Content of 1.5% (with a difference of 2.0% concentration) lanthanum tungsten electrode has the nearest 2.0% thorium tungsten electrode demonstrated conductive properties, therefore, welding personnel can easily replace the electrode, rather than replacement of equipment parameters.

In 1998 there is a very famous field trials, is to 2.0% thoriated tungsten electrodes, 2.0% and 1.5% cerium lanthanum tungsten electrode tungsten electrodes at 70 Ann 150 amps, 300 volts DC environment for welding tasks, the result is In both cases, 1.5% lanthanum tungsten electrodes have demonstrated its excellent welding performance, but also reflects its small burn rate characteristics. Lanthanum tungsten electrode is also suitable for AC welding tasks, and performance excellence.


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