The Origin And Development of Rare Earth Electrode

With the welding materials industry continues to progress and development of the reliability and stability of the electrode materials made ​​more stringent requirements. Multiple rare earth oxides with its high melting point, low electron work function , excellent thermal electron emission performance, as the main material instead of thorium tungsten and tungsten electrodes for welding small size had succeeded in replacing thoriated tungsten ; But in exchange argon arc welding arc remains poor, life is short so inadequate . In general, the composite rare earth tungsten electrode arc characteristics are superior to rare earth element tungsten electrodes , while the composite rare earth tungsten electrodes , the ternary complex sound in the binary complex .

In the late 1980s , a group of Japanese scholars in the development of new tungsten electrode materials has made some progress , especially studied a series of complexes of rare earth tungsten electrode material . Composition of the electrode design, performance comparisons and mechanism of a lot of work , find binary complex rare earth tungsten electrodes can improve the performance . Osaka University scholars composite ( binary, ternary ) rare earth tungsten electrodes have been studied , a preliminary study showed that: in terms of binary rare earth tungsten electrodes , CeO2: Y2O3 = 1:3 (W-CeO2 = 0. 5%, W-Y2O3 = 1.5%); ceria : lanthanum oxide = 1:1 ; lanthanum oxide : yttrium oxide = 1:3, the three components of the tungsten electrode performance is more prominent, especially in endurance wherein 1:3 (La2O3 + yttria ) tungsten arc 4h (180A) remain good performance , the durability performance of the arc 10h are acceptable , which is more than rare earth element to be much stronger durability of tungsten electrodes . For triad earth tungsten electrodes , the best ratio of rare earth oxides of cerium oxide : lanthanum oxide: Y = 1:1:3 , a good operational performance of this electrode sustainable 10h (180A), than other two yuan tungsten electrode and cell - lanthanum electrode (10h melting severe) ends better shape retention . Rare earth oxide in the composite tungsten electrodes , the lowest operating temperature of these electrodes , the highest emission efficiency : lowest electron work function , ie transmission is supreme , the overall performance is more prominent. Beijing University and Beijing Tungsten & Molybdenum Material Factory cooperative research binary complex rare earth tungsten electrodes , as well as ternary complexes of rare earth tungsten electrodes that composite tungsten arc welding electrodes and processes are better than single rare earth tungsten electrodes and thoriated tungsten electrodes .


Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com;sales@xiamentungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn


 

• < Prev
• Next >