Tungsten-Rhenium Alloy Wire Applications and Technical Principles

Since the late 1950s , tungsten rhenium alloy has been successfully in many fields of applications, such as high technology , electric vacuum industry, lamp industry, nuclear industry, analysis of technical, medical and chemical . Rhenium content with other tungsten rhenium wire compared to alloy wire doped W-3Re unique properties , high strength, good plasticity, doped W-3Re has the highest recrystallization temperature , 2500 ℃, coupled with a melting point of 3360 ℃, high temperature technology, electric vacuum industry, lamp industry, nuclear industry, analysis of technical, medical and chemical industries widely used, is a rare , hard to replace high-temperature materials.

But today, many areas of our country used W-3Re alloy wire is still dependent on imports, such as CRT electron gun , gas chromatograph thermal conductivity detector , vacuum tube industry , electronics assembly and test probe card of tungsten rhenium wire . W-3Re alloy wire localization without bulk main reasons: one , tungsten rhenium wire in the process , quick hardening , annealing must be timely and difficult process ; Second, China's tungsten industry processing means rich enough , invested more than R & D funding , limiting the development speed . As China's tungsten industry leading enterprises, Hong Lu Xiamen postdoctoral workstation by the company and the National Engineering Research Center of tungsten tungsten rhenium wire proposed R & D project topics , research and development of high-performance tungsten- rhenium alloy wire , in order to meet the needs of domestic users , reduce business risk , enriching the company tungsten product categories.

Application areas and technical principles

Application: tungsten rhenium alloy wire is mainly used for the electron gun , TCD filament , packaging and testing probe cards , etc., as rhenium alloy element distribution uniformity and processing difficulty is high, products are mostly dependent on imports , the project by improving the level of technology and equipment level, successfully prepared tungsten rhenium alloy wire , and to achieve mass production, downstream manufacturers to meet domestic requirements , to replace imported tungsten rhenium wire.

Technical principle: tungsten rhenium alloy can be prepared by a variety of ingredients , tungsten rhenium alloy compared with pure tungsten , rhenium alloy elements added during deformation , is conducive to the formation of twin crystals , reducing the deformation process of stacking fault energy , reducing the grain boundary movement of dislocations impedance ( Pearce - Nabarro stress ) , resulting in increased mobility of dislocations , the alloy exhibits a high ductility. Tungsten- rhenium alloy uneven good plasticity and strength , high hardness, which is usually called " rhenium effect ." Since rhenium effect , tungsten rhenium alloy has a series of excellent performance , high melting point, high hardness, high strength, high ductility, high resistivity , high values ​​of thermoelectric power , high recrystallization temperature , low vapor pressure , low electron work function and low ductile-brittle transition temperature. Tungsten- rhenium alloy is an excellent high-temperature structural materials technology in electronics , thermal control , modern nuclear technology and Space Technology , temperature field , instrumentation , electrical , and other cutting-edge technology have been widely used.


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