Tungsten -3 rhenium tungsten rhenium alloy wire is mainly used for the electron gun , TCD filament , packaging and testing probe card, the alloying element rhenium uniformity and processing difficulty, 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, mainly used in electronics technology, high-temperature alloy technology and aerospace technology and other aspects :

Tube material often subject to temperature changes and strong vibration , tube filament tungsten rhenium alloy wire used , a wide composition range . Requires high -performance anti- sagging filament , generally doped tungsten -3 rhenium tungsten rhenium alloy wire , requiring good low temperature ductility filament , usually tungsten -20 -25 rhenium tungsten rhenium and tungsten rhenium alloy wire. Satellite tubes require long life, high reliability , anti- vibration , launch satellites , tubes typically are exposed to 5-8G acceleration of gravity , -3 rhenium tungsten filament material requires tungsten rhenium alloy wire as the filament in order to meet the requirements.

Medical treatment machines and industrial inspection machines accelerated electron gun filament heated tungsten rhenium alloy wire must be used , while ensuring the performance requirements , to meet the long life requirements.

Folding pressure rectifier filament choose tungsten rhenium alloy wire production, not brittle , splitting fracture , rectifier electrical parameters of good consistency.
Tungsten- rhenium alloy is also used in the X-ray tube anode target target surface , the radiation effect, electron impact resistance performance is good , focal path loss, the focus is small, reducing the anode angle , the rotation is an excellent anode material. Tungsten- rhenium alloy target having a tungsten target both high penetration ability, and a molybdenum target and good color characteristics, in practice , the use of low voltage, for different thickness of the soft tissue , light metals and nonmetal soft X radiographs , with good results ; using a high voltage , it has the same effect as the tungsten target , as a target multipurpose .

Many commonly used electrical switch contact material into a car horn contacts and ignition contacts, voltage regulator contacts , telephone contacts and so on. In operation, the friction between each pair of contacts and spark erosion and high frequency characteristics of the contact , the contact material shall satisfy the following requirements, such as materials, contact resistance, arc volt-ampere characteristics and erosion rates of small and small , tungsten- rhenium alloy contact material is used for the development of new products in recent years , its performance can be used with platinum, rhodium and other noble metal contact material comparable.

In short , tungsten rhenium alloys are widely used in resistor technology , thermal control , modern nuclear technology, astronautics technology, high temperature technology , instrumentation , power vacuum , electrical contact and wear-resistant materials.

High-performance tungsten rhenium alloy completion of the project to achieve a tungsten -3 rhenium tungsten rhenium alloy wire production, but only this one type of tungsten- rhenium wire unable to enter the high-temperature thermocouple industry , in the next phase , rhenium tungsten -3 tungsten- rhenium alloy wire preparation techniques , based on improved equipment and processes through exploration, accumulated successful experience and data , other types of tungsten alloy for late development and lay a solid technology, tungsten, rhenium and tungsten -26 -20 rhenium tungsten rhenium alloy wire production.


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High-performance tungsten rhenium alloy production must first address the element rhenium alloy homogeneous distribution, which is the production of tungsten rhenium alloy wire preparation of the core technology ; swaged , annealing and drawing process parameters and process selection is tungsten- rhenium alloy wire thermal deformation processing of key technologies.

The Innovation of This Project Is To :

A ) the introduction of the food industry used in the medical use of horizontal mixing pot doping , the use of two solid-liquid doping process , to ensure the amount of rhenium and homogeneous distribution of elements are added at the same time , ensure that potassium alloy , aluminum, sulfur content in a certain range .

2 ) tungsten- rhenium alloys with rhenium solid solution strengthening effect now , alloy hardening speed, using a small compression ratio , the corresponding annealing point selection , the successful introduction of
3.7mm tungsten rod to protect high hydrogen annealing process and protection of the filament is energized hydrogen annealing solution annealing process of oxidation caused by burning and tungsten- rhenium combustion phenomenon.

Doping the second liquid , a liquid doping - pickling process , to ensure potassium alloys , aluminum and sulfur contents of the required range of the alloy ; medical food into the pot as a dopant doped with horizontal , 30kg pickling tungsten powder and the amount of ammonium perrhenate solution was stirred until dry, combination through this process to ensure that the ammonium perrhenate crystals wrapped in each uniform surface tungsten particles precipitated , makes the material in the hydrogen reduction process occurs pre-alloyed for homogeneous distribution of rhenium tungsten rhenium alloy wire to provide an initial ingredients guaranteed.

Tungsten- rhenium alloys with rhenium solid solution strengthening effect now , alloy hardening speed, using a small compression ratio , the corresponding annealing point selection , the successful introduction of hydrogen tungsten rod 3.7mm induction annealing process and the protection of the filament is energized hydrogen annealing protection solution cause oxidation during annealing and tungsten- rhenium burning combustion phenomenon, determined from the whole of 17mm ~ 2mg/200mm tungsten thermal deformation process , a small compression ratio and 7 times the annealing process combination processing to the diameter 0.39mm tungsten single weight of not less than 2.8kg, has reached the international advanced level.


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High-performance tungsten rhenium alloy project role significance ( direct economic and social benefits )

1 ) Direct Economic Benefits : in 2008 , the production of tungsten rhenium wire 10 million meters or more, thick wire is higher than 75% of total finished goods ; sales income of 200 million yuan, profit of 500,000 yuan ; 2009 , to achieve industrialization.

2 ) Social Significance : Tungsten -3 rhenium 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 , to fill the domestic blank, rich variety of high-end products, tungsten , and promote China development of deep processing power to tungsten .

High-performance tungsten rhenium alloy project promotion prospects

The project has achieved mass production , and achieve good economic returns , the products are mainly used in the electron gun , TCD filament , packaging and testing probe cards. In recent years , China's rapid development of chip production , China's manufacturing base has become the chip packaging and testing requirements of the test probe cards is growing, packaging and testing for the project with a tungsten rhenium wire probe card provides a broad development prospects .

Tungsten- rhenium alloy excellent thermoelectric properties and a high melting point , making it the highest maximum temperature contact method of the material , measurable 2800 ℃ high temperature . As fast thermocouple, use in the metallurgical industry steel and tungsten rhenium thermocouples measure the temperature of molten iron in the chemical industry in the tungsten- rhenium thermocouples used instead of expensive platinum-rhodium thermocouple . This helps greatly reduce costs, but also for the tungsten rhenium alloy explore a wider range of ways to apply . By a combination of a tungsten rhenium alloy wire thermocouple to measure the temperature of the upper electrode is close to the melting point of the rich rhenium . Compare with other thermocouples , tungsten rhenium thermocouple output thermoelectric power maximum , the highest sensitivity , thermoelectric power increases with the rhenium content increased.

Thus, the completion of the project to achieve a tungsten -3 rhenium tungsten rhenium alloy wire production, in the next phase , the tungsten rhenium tungsten rhenium alloy wire -3 preparation techniques , based on improved equipment and processes through exploration, accumulated successful experience and data for other types of post- tungsten alloy development and lay a solid technology, tungsten, rhenium and tungsten -26 -20 rhenium tungsten rhenium alloy wire production, tungsten- rhenium alloy systematically expand the company's product range and product quality, reserves to rely on technology to improve the company's competitiveness and profitability , instead of high-end imported tungsten rhenium wire.


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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.


Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
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