Tungsten alloy green bullets, also known as environmental green bullets.tungsten alloy  has the characteristics of hardness, wear resistance, high density, high temperature strength, chemical stability, corrosion resistance and other significant advantages. Tungsten alloy not only can replace lead bulletsas the main raw material , and tungsten alloy bullet performance is also better than the lead head bullets, its intensity should head over lead bullets. United States military has completed a "clean" development work bullets, and now this has been replaced by lead bullet head bullet, but this green bullet tungsten alloy head than lead bullets cost is slightly higher.

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Tungsten alloy warhead including 500 pounds, 1000 pounds and 2000 pounds of fixed charge of anti-blast warhead and penetration warhead. In order to destroy the six major types of moderate protection objectives, the United States developed a 2000 pounds, the new high-strength concrete penetrating warhead penetration 1000 pounds and 500 pounds, and as a supplement to existing warhead.

According AUP-3 program, Lockheed - Martin developed the 2000 pounds of BLU-116 / B penetrating warhead for aviation equipment GBU-24,31-guided bombs and AGM-86D air-launched cruise missiles. Furthermore naval aviation developed BLU-110 / B penetrating warhead for GBU-32 guided bombs, reducing the amount of explosives, increasing the cartridge case body wall thickness.

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Tungsten alloy deformation strengthening is to improve the mechanical properties, particularly effective means of strength. The methods are:

1: By the tungsten particles and the binder phase deformation strengthening tungsten particles, so that the tungsten military alloy swaging rod will be strengthened

2: When the rotary forging billet surface and center stress and deformation in different ways, the role of the surface by additional bending deformation and friction to strengthen the Ministry of degree higher than the heart, strengthen showed heterogeneity.


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Tungsten alloy radiation protection products  is based on  tungsten  (W content of 85-99%), and adding an alloy Ni, Cu, Co, Mo, Cr and other elements. Composition according to the characteristics and uses a tungsten alloy can be divided into W-Ni-Fe, W-Ni-Cu, W-Co, W-WC-Cu, W-Ag other major series, the density up to 16 .5-19.0g / cm3 . Advantages of high density tungsten alloy to produce radiation protection products are:

1: The ability to absorb rays (30-40% higher than lead)

2: No harm to the environment and health

3: The specific gravity (16.5 ~ 18.75g / cm3)

4: High intensity (700-1000Mpa)

5: Good conductivity

6: Large thermal conductivity (5 times mold steel)

7: Corrosion

8: Thermal expansion coefficient

9: Good weldability, machinability

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The study found that radiation protection related to its density of the material goods, the greater the density shielding performance better. Tungsten alloy has great density, which prompted its high shielding performance, and tungsten alloy products are environmentally friendly products, there are fewer products than lead hazards. Tungsten alloy products easy processing and non-toxic, is the best material shield.

Due to the high density tungsten alloy, strong ability to absorb radiation, it can replace lead used to make nuclear fuel reservoir and radiation shielding materials, tungsten alloy radiation shielding products mainly include: radioactive source in full bloom, a gamma radiation shielding, shielding block , oil drilling equipment, X-ray collimator, tungsten alloy PET shield, cancer treatment equipment shielding, tungsten alloy (heavy alloy) multi-leaf collimator leaf MLC, tungsten collimator, tungsten alloy protective tank, tungsten alloy shielding the needle, tungsten alloy memory, collimators, tungsten alloy container, gamma camera collimator tungsten alloy, tungsten alloy system detects container collimator, geological Survey shielded gamma-ray collimator tungsten alloy, tungsten alloy pipe inspection quasi-ray shielding straight, industrial flaw detection of gamma rays shielding tungsten collimator.


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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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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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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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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.


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Tungsten alloy chemically stable, non-toxic and environmentally friendly, at room temperature and atmospheric pressure does not react with acid and alkali, sweat is not easily disseminated and corrosion, making it the sword of production has a profound effect. Tungsten alloy counterweight so that the overall weight of the hilt of the sword to reach an equilibrium level of use, increased use of comfort, while the difference between its counterweight methods are:

1:Surround handle method. Adding tungsten alloy that is on the sword handle counterweight. Since the diameter of the handle of the sword is longer, operate more simple and beautiful, and therefore the use of this approach to the hilt with heavy tungsten alloy is more common.

2:Handle end counterweight method. This hilt with heavy tungsten alloy counterweight law allows the tip to maximize away, according to the lever principle, which can be more effective in reducing the balance.

3:Hollow core material law. Upcoming sword handle join hollow core material. This method does not affect the appearance, the operation is relatively easy, the feasibility is strong. The disadvantage is that it is difficult to precisely control a custom length.


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