Lanthanated tungsten Alloy Rod
Description
Lanthanated tungsten is an oxidized lanthanum doped tungsten alloy, categorized as oxidized rare earth tungsten (W-REO). When dispersed lanthanum oxide is added, lanthanated tungsten displays enhanced heat resistance, thermal conductivity, creep resistance, and a high recrystallization temperature. These outstanding properties help lanthanated tungsten electrodes achieve exceptional performance in arc starting ability, arc erosion resistance, and arc stability and controllability.
Properties
Rare earth oxide doped tungsten electrodes, such as W-La2O3 and W-CeO2, possess many superior welding characteristics. Rare earth oxide doped tungsten electrodes represent the best properties among electrodes for Gas Tungsten Arc Welding (GTAW), which is also known as Tungsten Inert Gas (TIG) welding and Plasma Arc Welding (PAW). The oxides added to tungsten increased the recrystallization temperature and, at the same time, promoted the emission level by lowering the electron work function of the tungsten
| Oxide Rare Earth Properties And Composition In Tungsten Alloy | ||||
| Type of oxides | ThO2 | La2O3 | CeO2 | Y2O3 |
| Melting point oC | 3050(Th: 1755) | 2217(La: 920) | 2600(Ce: 798) | 2435(Y: 1526) |
| Heat of decomposition. Kj | 1227.6 | 1244.7 | (523.4) | 1271.1 |
| Type of oxides after sintering | ThO2 | La2O3 | CeO2(1690)oC | Y2O3 |
| Reaction with tungsten | Reduction of ThO2by W occurs.forming pure Th. | Forming tungstateand oxytungstate | Forming tungstate | Forming tungstate |
| Stability of oxides | Lower stability | Higher stability | Reasonable stability atthe electrode edgebut lower stabilityat the tip | High stability |
| Oxide weight % | 0.5 - 3 | 1 - 3 | 1 - 3 | 1 - 3 |
Features
Our lanthanated tungsten products include WLa10 (La2O3 1-1.2 wt.%), WLa15 (La2O3 1.5-1.7 wt.%), and WLa20 (La2O3 2.0-2.3 wt.%).Our lanthanated tungsten rods and machined parts meet various specifications and standards for a wide range of applications. We offer lanthanated tungsten electrodes for Tungsten Inert Gas (TIG) welding, resistant welding, and plasma spraying. We also provide large diameter WLa rods for use in semiconductor components and high-temperature furnaces.
Applications
WLa TIG welding electrodes are easily arc initiated and highly durable. WLa plasma spray electrodes exhibit excellent resistance to both arc erosion and high temperature and possess superior heat conductivity. WLa resistance welding electrodes have a high melting point and offer outstanding operational stability.
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