Tungsten carbide powder is the main raw material for the production of cemented carbide, and its chemical formula is WC. Called Wolfram Carbide, also translated as tungsten carbide black six square crystals, with metallic luster, hardness and diamond are similar, as are good conductors of electricity and heat. Melting point is 2870 ℃, and boiling point is 6000 ℃, with the relative density of 15.63 (18 ℃). Tungsten carbide is insoluble in water, hydrochloric acid and sulfuric acid, mixed acid soluble in nitric acid and hydrofluoric acid. Tungsten carbide is pure, if the incorporation of a small amount of titanium and cobalt can reduce the brittleness. The tungsten steel cutting tools are often add titanium carbide, tantalum carbide or their mixture to improve the anti explosion capacity. Chemical properties of tungsten carbide are stable.

1 . Main Properties

Tungsten carbide powder is dark grey powder, which can dissolve in a variety of carbide, especially in titanium carbide solubility in large, formation of TiC-WC solid solution. Another compound, tungsten and carbon as ditungsten carbide, chemical formula W2C,which melting point is 2860 ℃ and boiling point is 6000 ℃,with the relative density of 17.15. Ditungsten carbide’s the properties, preparation method and use is the same as tungsten carbide.

2 . Main Use

Tungsten carbide powder is mainly used in the production of cemented carbide. The tungsten carbide, tungsten metal lattice interstitial carbon atoms embedded, does not destroy the original metal lattice, the formation of interstitial solid solution, so also called interstitial (or insert) compounds. Tungsten carbide by high temperature heating a mixture of tungsten and carbon, hydrogen or the presence of hydrocarbons can speed up the reaction. If the oxygen compounds containing tungsten prepared products must eventually be vacuum treatment at 1500 ℃, to remove the carbon oxygen compound. Tungsten carbide is suitable for machining at high temperature and make cutting tools, the structure of the furnace material, the jet engine, gas turbine and nozzle.

3. Place of Production

The main production enterprises in China are Zhuzhou, Zigong, Nanchang, Lushun hard alloy factory. Tungsten carbide powder annual production mainly for domestic use, some are exported to Japan, the United States, Germany, Italy, France, Sweden and other countries.

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Density of the materials is a key factor in the impact kinetic energy penetrators penetrating force, from the viewpoint of economic feasibility, of heavy metals may be used only depleted uranium penetrator material alloys and tungsten alloys. There are somes differences between depleted uranium alloys and tungsten alloys :

1: Mechanical properties and yield strength. Under quasi-static conditions, the traditional mechanical properties of depleted uranium alloy tungsten alloy is almost equal, and the yield strength of tungsten alloy high 25% to 30% over the depleted uranium alloys.

2: Safety and environmental protection. Depleted uranium is radioactive contamination, which can cause environmental and political issues, with the development of promising more narrow.

3: Adiabatic shear sensitivity. Tungsten alloy with adiabatic shear sensitivity, but the effect is not good depleted uranium alloy, so to improve its "self-sharpening" effect has become a hot spot, you need to intensify research.
 

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Nowadays, tungsten alloy is increasingly used in some field relevant to gold substitution or platinum substitution, such as gold plated tungsten jewelry. Meantime, tungsten is also used for tungsten golden bars making, which is a popular gold substitution. Also, it is widely adopted in making faking coins, such as memorial crown.

Since tungsten alloy bears a special property of longevity and high durability, when it is utilized to make jewelry, it always implicate the love between lovers or couple could be everlasting. Its hardness makes it ideal for rings that will resist scratching, are hypoallergenic, and will not need polishing, which is especially useful in designs with a brushed finish.



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In theory, as its density is 19.1g/cm3, which is approximately 70% denser than lead, uranium could be the good gold substitution, used as material of making fake coin. However, uranium is weakly radioactive and not as dense as gold, so it does not appear to be a practical method.

Then people have discovered that tungsten is environmental-friendly, durable and hardness, the most important is that its density of 19.25g/cm3 is just about the same density as gold (19.3g/cm3), which bears the similar specific gravity. These advantages make tungsten enjoys the superiority to be the best gold substitution for the costly metal of gold or platinum.


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