Lanthanum tungsten electrode is a hundred years European countries have introduced a class of products , the purpose is expected to replace with radioactive thorium tungsten electrode . Once launched , lanthanum tungsten electrode will by the international community praised the welding , and its export volume has considerable tungsten electrodes with thorium . Lanthanum tungsten electrode is characterized by conductive properties closest to 2% thoriated tungsten electrodes , durable high burning rate of the current minimum .

Lanthanum oxide, lanthanum component comprising tungsten oxide, lanthanum into 2 %, 1.5% , 1%, three levels . Lanthanum is a rare earth, and no radioactive , it is known as lanthanum tungsten electrodes substituted products thoriated tungsten electrode . Lanthanum tungsten electrode is mainly used for DC welding, AC welding can also play a good effect . 1.5% lanthanum tungsten electrode , low current, easy arc starting and stable low current arc . 2% lanthanum tungsten thorium tungsten electrode life longer than 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.

Lanthanum tungsten electrode welding performance is to add 1-2 % tungsten lanthanum oxide electrodes , electron work function at the 2.7-2.8ev, thorium tungsten electrode has the most similar properties. When used in the small current arc resistance and burning performance than thoriated tungsten electrodes have improved .

Lanthanum tungsten electrode due to non-radioactive and become a more promising alternative to thoriated tungsten electrodes . Another advantage is its high durability and burning rate of the current minimum , so lanthanum tungsten electrodes by Asia, Europe , America and Japan and other countries clients.


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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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Lanthanum tungsten electrode welding performance and conductive properties closest to 2% thoriated tungsten electrodes, and no radiological hazards, welders welding operation without changing any program can use this convenient alternative thorium tungsten electrode is an electrode, so lanthanum tungsten electrode become the most popular in Europe and Japan 2% thoriated tungsten electrodes alternatives. Lanthanum tungsten electrode is mainly used for DC welding, but for AC welding also performed well.

Lanthanum tungsten electrode manufacturing method relates to a method mainly used for TIG (tungsten inert gas welding) and PLASMA (plasma) technology for metal welding, cutting, spray coating, a melting method for manufacturing the tungsten electrode.

(1) using lanthanum acetate and including APT, WO3, and W powder of solid material made from a slurry of water mixed to prepare a lanthanum tungsten-coated powder;

(2) lanthanum lanthanum tungsten-coated powder decomposition of hydrogen atmosphere in the reduction process and simultaneously, a reduction temperature is controlled at 600 ~ 700 ℃, time is 2 to 3 hours, the second reduction temperature control 800 - 970 ℃, the hydrogen flow rate during the 0.5-2.0m3 / h.

10 / plastic box, the length is 150mm or 175mm, 1000  per carton.

Lanthanum tungsten electrode welding because of its good performance in the international welding industry concern. Lanthanum tungsten electrode conductivity closest WT20 thorium tungsten electrode. Therefore, welders welding operation without changing any program can use this convenient alternative thorium tungsten electrode electrode. This shift, whether in exchange conditions or under DC conditions are easier. Another advantage of lanthanum tungsten electrode performance at its current high durability and burning the minimum rate.


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characteristics as tungsten , makes it very suitable for TIG welding and other similar electrode material such work . In adding rare earth oxides of tungsten to stimulate its electronic work function , making the tungsten electrode welding performance can be improved : electrode arc better performance, higher stability of the arc column electrode burning rate is smaller. Usual additives earth oxide, cerium oxide , thorium oxide, lanthanum oxide, zirconium oxide and yttrium .

thoriated tungsten electrode : tungsten thorium oxide is added .

Thoriated tungsten electrode has the following advantages : lower electronic features , the higher the crystallization temperature , better conductivity , mechanical cutting properties

Thoriated tungsten electrode is a tungsten electrode material commonly used , it is also superior than that of pure tungsten welding performance , which is widely used in DC welding field . Thoriated tungsten electrode is simple , even when the overload current of the operation can be very good , there are still many companies use of this material , it is seen as a part of high quality welding . Thorium tungsten electrode during use , energy-saving effect is obvious, from the arc current 20-50% relative decline , the welding current is low , the process of using less prone to splashing , very easy to change the first round , the electrode life is longer. In the use of thorium tungsten electrode welding must maintain good ventilation , waste welding head to properly handle .

Thoriated tungsten electrode is a widely used additive oxide electrode , it is other than that of pure tungsten electrode and the oxide electrode is also advantageous to add the comprehensive welding performance in long-term use , it is the other oxide electrode irreplaceable . Thorium tungsten electrode is simple, current load, easy arc starting , stable arc, breaking the arc gap, low loss , long life, higher recrystallization temperature , conductivity better mechanical cutting performance. Thorium tungsten electrode is widely used in steel, stainless steel , nickel alloys and titanium welding, is a high- quality welding material of choice.


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