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2023年03月

Copper Tungsten Rod Definition

Copper tungsten rod (WCu) is the composite of tungsten and copper which own excellent performance of tungsten and copper. It is used widely in such industries as engine, electric power, electron, metallurgy, spaceflight and aviation.

Tungsten copper rod is a kind of round rod. Tungsten copper rod is a kind of composite material, which is manufactured by carbide turning inserts high-purity tungsten powder and high conductivity copper powder with the production process of isostatic pressing, sintering temperature and copper infiltrated

The manufacturing process is as follows: press the refractory metal, sinter the pressed compact at a high temperature, and infiltrate it with copper. All this is done under very closely controlled conditions. The result is a relatively hard material with superior arc and wear resistance, high physical Properties: at elevated temperatures, and good electrical and thermal conductivity.

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Tungsten Copper Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-copper.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.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

Sodium Tungstate Preparing Pyrochlore Type Tungsten Oxide

The chemical formula of pyrochlore type tungsten oxide is  H2W2O7. Pyrochlore type tungsten oxide has recently found its wide applications in many different areas such as photoelectron-chemistry, functional material and sensing. In addition, pyrochlore type tungsten oxide can be used as intermediate product for the industrial production of WO3. There are many kinds of synthesis methods of the pyrochlore type tungsten oxide. And there are two main types: Aurivillius type compound as precursor, pyrochlore type tungsten oxide is obtained by acid treatment. The second method is hydrothermal synthesis method, namely sodium tungstate solution acidification to a certain pH range and it can be threading Inserts obtained by hydrothermal reaction for a certain time. The hydrothermal method that has overwhelming superiorities than others also has its own sets of flaws such as high cost, long reaction time and low quality product. Therefore, how to intensify the preparation process of H2W2O7 to obtain high quality product with low cost has become an urgent problem.

How to Test for Real or Fake Gold

Buying gold can be a great long-term investment, as long as you're buying real gold. Gold is a valuable commodity, which attracts people who wish to make some money through counterfeiting. The best way to determine whether your gold is fake is to go to a jewelry store and have it tested, however this may cost you some money. Alternatively, before you venture out to go buy gold, learn a few simple ways of determining whether the gold you're looking at is real or fake.

1.Put the magnet next to the gold. Real gold will not be attracted by the magnet, however fake gold or gold-plated metal will be attracted.

2.Rub the gold with a jewelry cleaning cloth. If the gold is fake, a few hard rubs will remove the plating.
3.Place the gold into sterling silver cleaning solution. After a day, real gold will not oxidize, however plated brass will.

4.Rub face powder onto your arm using a powder pad. Rub the gold against the powder on your skin. If it makes a black mark, it is real gold or gold-plated.

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Gold plated Tungsten Product Manufacturer & Supplier: Chinatungsten Online tungsten carbide inserts - http://paper-weight.cn/
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.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

Tungsten Carbide Button Microelement

Tungsten carbide buttons are widely applied in geological prospecting, coal mining and oil well boring. Because of its wear resistance and hardness, tungsten carbide button is ideally suited for wear parts, other machine parts and dies which are subject to severe service conditions, such as high temperatures, corrosion and abrasion.

Some manufactures in China and from abroad add a trace of TaC into tungsten carbide button in order to improve tungsten carbide button binder structure, promote its wear resistance, resistance to heat shocks and thermal plastic deformation. But TaC can reduce tungsten carbide button hardness and toughness, increase the producing cost.

Some other researchers add Ta and Mo into tungsten carbide button and it turns out the button is of high tenacity and high hardness. This is because of a complex layer formed in the tungsten carbide grain with Ta and Mo. Thus tungsten carbide button performs a great impact toughness and high wear resistance.

 
 Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 Tel.: 86 592 5129696; Fax: 86 592 5129797
 Email:  sales@chinatungsten.com
drilling inserts suppliers  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

Operating Procedure of Tungsten Heater for Aluminum Plating Machine - Power Control

Tungsten heater is used as a heating element in aluminum plating machine for aluminum film. Aluminum machine operation begins with the power supply.

Firstly, cemented carbide inserts open power supply, turn on each cycle valve, cooling vacuum system, and open the maintain pump to pre-vacuum pumping for diffusion pump for 30 minutes, heated diffusion pump about 1 hour and vacuum aluminizing.

Cleaning up the operation vehicle, and then placing tungsten heater, molybdenum wire magnesium fluoride, two tin board, and put aluminum workpieces. Put the operation vehicle into the room, close the door, and open mechanical pump. 5-7 seconds later, open the pre-pumping valve F2, open composite vacuum gauges, there are two screens of high and low vacuum, on the vacuum gauge. When the low vacuum gauge displays 4.0E-0, close pre-pumping valve F2, pre-opening valve F3, and open the high vacuum valve F1. When the high vacuum valve shows 4.0E-2, open the work vehicle, and adjust the voltage in the 50V-70V. After the rotation is normal, open FK3 valve flow indicator, turn off a high vacuum flapper valve, and control high vacuum table. When it shows 4.0E-0, open bombardment power and adjust voltage between 800V-1200V to clean ion for 5 minutes. Turn off the bombardment power and rotated power, FK3 valve. Close flow indicator, open high vacuum baffle valve for creation of vacuum. After high vacuum table shows 2.0E-2, it is time to vacuum aluminizing.

If the time for vacuum aluminizing stay for too long, it would cause that the tungsten wire would direct baked aluminum layer of tungsten surface, and then it would be oxidation and become yellow. The quality of aluminum film also influenced by the quality of vacuum, the stable process parameters, subsidiary materials for aluminizing, the storage time of aluminizing workpiece. If the cleaning of coated article is not complete, its surface would have residual cleaning agents and water.

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