Today, let us learn about tungsten supply in the world.

There is plenty of tungsten in the ground. But some of the biggest tungsten deposits are different to access.

Over the last few years, sources of tungsten supply have changed dramatically. In 1986, the USSR was the largest tungsten consumer in the world. By 1992, the reformed CIS was exporting tungsten and by 1996, the CIS became the second largest tungsten supplier in the world.

Today, other main tungsten producing countries are China, Austria, Bolivia, Peru and Portugal. Whilst in the last decade, tungsten mines have closed in Australia, Brazil, Canada, France, Japan, South Korea, Sweden, Thailand and the USA.

Not only have the sources of tungsten supply altered but also have the tungsten compounds traded.

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Tungsten, once thought to be an environmentally friendly metal, may not be as safe as believed, researchers said. Today, we will talk about tungsten safety.

Tungsten is widely used in products ranging from bullets to light bulbs to jewellery. Scientists strongly held that tungsten is relatively insoluble in water and nontoxic.
In mid-1990s, the U.S. military adopts the so-called green bullets that contain tungsten as a more environmentally friendly substitude to lead-based ammunition.

While, new studies have shown that tungsten, which is also used in welding, metal cutting, is not as safe as thought. For example, exposure to tungsten would stunt the growth of plants, cause

reproductive problems in earthworms and trigger premature death in certain aquatic animals.
Both the U.S. Department of Defense and the Environmental Protection Agency have classfied tungsten as an emerging contaminant.
Although scientists think that tungsten seems less toxic, they do not know its exact healthy and environmental effects.
Whether or not tungsten would cause chronic health effects in human and our mechanism, it needs further study.
All information are about tungsten safety.

 

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Aerospace applications of tungsten alloys include mass balances in satellites and helicopter rotor blades and in gyroscopic controls for missiles and avionics. In contrast to their vibration damping applications, these materials are also utilized, in the cockpit, to exaggerate the required vibrations in stall-warning shakers for control columns. Similarly, the advent of fly-by-wire controls has introduced small quantities of tungsten alloys into flight control joysticks, in order to increase stick inertia and therefore reintroduce some of the “feel” that is present in traditional controls, which use mechanical linkages to the elevators and ailerons.

Tungsten alloys contribute to aircraft fabrication and repair operations. To deaden the vibration caused by rivet guns, tungsten alloy bucking bars (“riveting dollies” or “hand anvils”) are used to absorb the force. The vibration can result in damage to nerves, muscles and bones in operators' hands causing Carpel Tunnel Syndrome (Vibration White Finger). Many aerospace companies now reduce the effects of vibration by using tungsten alloy bucking bars.

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Crankshaft is the part of an engine, which translates reciprocating linear piston motion into rotation.

In the engine, It is a necessary to use the counterweights to keep the balance of the reciprocating motion of each piston and connecting rod, as the parts of crankshafts usually. Tungsten heavy alloy is certainly considered as the most appropriate crankshaft material for its properties.

Therefore, tungsten heavy alloy parts can be used as counterweight in machines and vessels as well as aircraft, ships, yachts, space shuttles and anywhere need much heavy but little space, the tungsten heavy alloy crankshaft is widely used in high-performance engines (automobile, racing car, motor, fan, diesel, truck, yacht, jet, fan etc.)

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