Tungsten heavy alloys comprising by weight from about 80 to about 100% tuten and from about 0 to about 20% of one or more heavy alloying metals are produced by introducing powders of tungsten and the alloying metals into a thermal spray plasma gun, melting the powders in the hot zone of the gun to form a molten alloy and then spraying the molten alloy in droplet form into a collecting chamber where the droplets are solidified, and the resultant alloy in powdered form is collected. The powdered alloy can be further mixed with powdered copper, iron, nickel, cobalt or tantalum and compacted by dynamic or explosive compaction to form a near full density material. Full density materials are produced by further thermomechanical processing of the compact.

Tungsten heavy alloys, which are of great value in counter weights for aircraft, in ballistics, and in other applications, are conventionally produced by liquid phase sintering of mixed elemental powders. Alloys produced by this method are generally two-phase composites consisting of rounded tungsten grains dispersed in an alloy metrix.

The mechanical properties of tungsten heavy alloys are strongly dependent upon their specific microstructural features: for example, the grain size, contiguity, dihedral angle and the volume fraction of the tungsten phase. For a given tungsten content, the optimal microstructure exhibits low contiguity, small grain size, and strong W-W grain boundary and W-matrix interface.


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Mixing tungsten with carbon creates a strong material called tungsten carbide. The material has become increasingly popular in many industries around the globe. Its uses range from construction tools to jewelry to weapons.

Facts
Tungsten's atomic number on the Periodic Table is 74; its atomic symbol is W. The element is highly resistant to bases and acids. Tungsten's melting point of 3,422 degrees Celsius is the highest of any metal. Hard by itself, tungsten becomes even more durable when combined with carbon, as well as nearly scratch resistant.

Uses
Tungsten carbide is used to make cutting tools for metalworking, drilling construction and mining. Its strength makes it a popular material for jewelry, such as rings, bracelets and necklaces. Weapons makers use tungsten carbide to produce armor-piercing ammunition.

Comparisons
Tungsten carbide is a much more versatile material than most other metals. It is four times as hard as titanium and twice as hard as steel. Tungsten carbide is much more heat resistant than both metals as well.

History
Tungsten was discovered in 1758 and first separated from wolframite in 1793. In the 20th century, tungsten carbide became best known as the material for light bulb filaments. Tungsten carbide was widely used in World War II for making weapons.

Sources
Leading producers of tungsten carbide include China and Russia. Canada, Bolivia and the United States have large reserves. Some 30,000 tons of tungsten carbine are produced annually.


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There are various kinds of tungsten heavy alloy products, like tungsten heavy alloy rod, tungsten heavy alloy plate, etc.. This article is talking about tungsten heavy alloy main applications.

Tungsten heavy alloy can be used in many fields due to its excellent properties, such as small capacity but high density. When it comes to tungsten heavy alloy main applications, tungsten heavy alloy could be widely used for different industries and countries in various fields, such as the sports, including golf, fishing, darts, racing cars and others. Tungsten heavy alloy can be used in the medical treatment, like radiation shielding, isotope container, source holder. Tungsten heavy alloy can also be used in the scientific field, like tungsten heat sinks, oil drill, mine exploration and others. Tungsten heavy alloy is also used as a substitution in some military products for Depleted Uranium.

For its high melting point, tungsten heavy alloy is usually used in high temperature fields. Tungsten heavy alloy is friendly to the environment, so tungsten heavy alloy can be produced into fishing sinker, jig and other products. Due to its special properties, tungsten heavy alloy is very popularly applied in our daily life.


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With very sharp cutting edges and slot type, the cutting force of tungsten solid carbide cutting tools is small in aluminium alloy machining, and it also include the advantages of high chip space and smooth chip removal. So gradually the solid tungsten carbide cutting tools replaces of the high speed steel cutting tools.

In addition, the elastic modulus of tungsten carbide is about 3 times of steel, which means that under the same load, the deformation of tungsten solid carbide cutting tools is only a third of indexable cutting tools. As helical tooth end mill, solid tungsten carbide end mill can smoothly cut into and out. Its chip removal is also very smoothly, all of that helps to decrease the fluctuation of cutting force to restrain the vibration trends.

Tungsten solid carbide cutting tools system can bring potential advantage for aluminum rough machining and finish machining, especially the use of 25 to 100 mm medium to large cutting tools. To be used for aluminum alloy processing, tungsten solid carbide cutting tools has better security, versatility,higher metal removal rate and unparalleled performance without grinding again. However, many cases of finish machining can't reach the required level. But now, Sandvik Coromant’s CoroMill790 can achieve this through new cutting edge, blade, blade bearing and the clamping technology.


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