Pure tungsten electrode is the earliest electrode used in arc welding technology.
TIG technology refers to the welding method under the function of protective gas-argon gas, that is to say, it is a technology that inlet the argon gas as a protective gas around the arc welding, isolate the air outside the welding areas to prevent the oxidation of welding material, which is also known as argon arc welding, can be used to weld metal hardware, stainless steel and other materials.

Arc welding refers to the process that using the heat generated by arc combustion (i.e., arc discharge) to make welding electrode (or welding wire) smelting with workpiece and condensation, then it will form the weld, and then a solid workpiece can be obtained, in industrial production, this method has the most wide application.

Pure tungsten electrode owns good conductivity, small thermal expansion coefficient, low resistance, low vapor pressure and high elastic modulus and other excellent performance.
Today, with the economic development, the world annual demand for the tungsten electrode is still in a growing trend. China's annual output of tungsten electrode has been growing steadily, accounting for about 3/4 of the world production of tungsten electrodes.



 

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Pure tungsten electrode is one species of tungsten electrode, the species of tungsten electrode and its application

Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
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The content of tungsten in pure tungsten electrode is higher than 99.5%, and there are no other alloying elements existing. Compared to other tungsten alloy electrode, such as, tungsten copper electrode, silver tungsten electrode and tungsten nickel electrode, etc., because pure tungsten has high electronic work function, so its arc is more difficult than tungsten alloy electrode, and it is also difficult to maintain the stability of the arc beam. It’s the tip temperature of the electrode is relatively high, it will make the grain easy to grow, and the arc beam will be instable, leading to harder arcing, and shorter service life (improvement method: adding rare earth oxides). Therefore, tungsten is only used for AC welding.

Arc, as the name suggests, it is the process that the welding material (welding wires, welding rods, etc.) ignite the arc process.

Basic index of pure tungsten electrode

Electronic work function refers to the electronic break the bound of the nucleus, the minimum energy needed to escape from the surface of the material.



 

Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
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Compared with common nozzle, tungsten carbide pulsed nozzle can accelerate 10%-77% at speed in drilling and deepen 10%-48% in depth of drilling, which definitely improves oil field drilling and brings about financial benefits. Because the chamber of pulsed nozzle is bigger than the entrance and exit, using traditional methods can not suppress sintering powder metallurgy so that we should take advantage of powder metallurgy principle, no needs welding processing, and the product as a whole, duration will be highly improved.

Its principle is the flow runs into chamber and via two upper and lower reflecting surfaces , the upper surface reflecting pressure wave is equal to the lower movement of the pressure wave phase, and comes into addition of waveforms. And the circle shearing stress is forming water bombs in vacuum, where generated in the high-pressure, high velocity water bombs discharged form a discontinuous flow of the water ejection, continuous power to overcome the shortcomings of the existing continuous small-jet nozzle, and improve the instantaneous impact force of the jet spray distance and the effective energy of the flow reaches the bottom of well.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
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