Uses and applications of tungsten
Tungsten is a kind of rare metal, similar to steel, because of its high melting point, high hardness, excellent corrosion resistance, good conductivity and thermal conductivity, and has become one of the most important functional materials in modern industry, national defense and high-tech applications. So what are the applications of tungsten?

First, alloy field

Iron and steel

Tungsten is an important alloying element due to its high hardness and density, which can significantly improve the strength, hardness and wear resistance of steel. It is widely used in the production of various steels. Common tungsten-containing steels include high-speed steel, tungsten steel and tungsten-cobalt magnetic steel, which are mainly used to manufacture various tools, such as drill, milling cutter, negative and positive die.

Tungsten carbide base carbide

Tungsten carbide has high wear resistance and refractory, and its hardness is close to diamond, so it is often used in the production of hard alloy. Tungsten-carbide cemented carbides can be generally divided into four categories: tungsten-cobalt carbide, tungsten-titanium carbide, tungsten-titanium carbide, tantalum carbide (niobium) -cobalt and steel bonded cemented carbides, which are mainly used in the manufacture of cutting tools, mining tools and wire drawing die.
To produce high-strength parts such as rocket nozzles and engines.

High gravity alloy

Because of its high density and high hardness, tungsten has become an ideal material for manufacturing high gravity alloy. According to the composition characteristics and use of different, these high specific gravity alloy can be divided into W-Ni-Fe, W-Ni-Cu, W-Co, W-WC-Cu, W-Ag series, they have a large specific ratio, high strength, high thermal conductivity, good electrical conductivity, superior processing performance and other characteristics, Often used to manufacture armor, heat sink, knife switch, circuit breaker and other contact materials.

Second, electronic field

Tungsten is widely used in electronics and power industry because of its strong plasticity, low evaporation rate, high melting point and strong electron emission ability. For example, tungsten filament has high luminous rate and long service life, and is commonly used to manufacture a variety of light bulb filament, such as incandescent lamp, iodine tungsten lamp and so on. In addition, tungsten wire can be used in the manufacture of directly heated cathodes and grids for electronic oscillating tubes and cathode heaters in various electronic instruments.

3. Chemical industry

Tungsten compounds are commonly used to produce certain types of paints, pigments, inks, lubricants, and catalysts. For example, sodium tungstate is often used in the manufacture of metal tungsten, tungstate acid and tungstate, as well as dyes, pigments, ink, electroplating and other aspects; Tungstic acid is often used as mordant and dye in textile industry and catalyst for making high octane gasoline in chemical industry. Tungsten disulfide is often used in organic synthesis, such as in the preparation of synthetic gasoline as a solid lubricant and catalyst; Bronze tungsten oxide is used in painting.

4. Medical care

Tungsten's hardness and density make it ideal for medical applications such as X-rays and radiation protection. Common medical products of tungsten alloy include X-ray anodes, anti-scattering plates, radioactive containers and syringe shielding containers.

5. Military field

Due to its non-toxic and environmental protection properties, tungsten products have been used to replace lead and depleted uranium materials to manufacture bullet warheads, so as to reduce the pollution of military materials to the ecological environment. In addition, tungsten, because of its strong hardness and good high temperature resistance, can make the combat performance of the prepared military products better. The main tungsten products used in the military are: tungsten alloy bullets, kinetic energy piercing bullets.

In addition to the above applications, tungsten can also be used in aerospace, navigation, atomic energy, shipbuilding, automotive industry and other fields.