Tungsten has become an ideal material for making high-specific gravity alloys due to its high density and hardness. These high-specific gravity alloys can be divided into W-Ni-Fe, W-Ni-Cu, W-Co, W-Wc-Cu, W-Ag and other series according to their composition characteristics and USES. They are often used to manufacture armor, heat sink, knife switch, circuit breaker and other contact materials due to their heavy ratio, high strength, large thermal conductivity, good electrical conductivity, superior machining performance and other characteristics.
I. Alloy field
Iron and steel
Tungsten because of the high hardness, density is very big, because can significantly increase the strength, hardness and wear resistance of steel, is one of the important alloy elements, are widely used in various kinds of steel production, common containing tungsten steel has a high speed steel, tungsten steel and tungsten cobalt magnetic steel, etc., they are mainly used for manufacturing a variety of tools, like drill bits, milling cutter, the female die and male die, etc.
Tungsten carbide cemented carbide
Tungsten carbide is often used in the production of cemented carbide because of its high wear resistance and refractory property, and its hardness is close to diamond. Tungsten carbide cemented carbide can be divided into four categories: tungsten carbide - cobalt, tungsten carbide - titanium carbide - cobalt, tungsten carbide -
tantalum (
niobium)- cobalt and steel bonded carbide, which are mainly used for manufacturing cutting tools, mining tools and wire drawing die, etc.
Second, the field of electronics
Tungsten is widely used in the electronics and power industry because of its strong plasticity, low evaporation rate, high melting point and strong electron emission ability. For example, the luminous rate of tungsten filament high, long service life, and commonly used to produce all kinds of bulb filament, such as incandescent lamp, iodine tungsten lamp, etc. In addition, tungsten wire can also be used in the manufacture of direct hot cathode and grid of 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 metallic tungsten, tungstate and tungstate, as well as in dyes, pigments, inks, electroplating, etc. Tungstate is often used as mordant and dyestuff in textile industry and catalyst for producing 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 - colored tungsten oxide was used in the painting.
Iv. Medical field
Tungsten's high hardness and density make it ideal for use in medical applications such as X-ray and radiation protection. Common medical products of tungsten alloys include X-ray anodes, scatterers, radioactive containers and syringe shielding containers.
V. Military field
Due to its non-toxic and environmentally friendly properties, tungsten products have been used to replace the previous lead and depleted uranium materials to make bullet warheads, in order to reduce the ecological environmental pollution caused by military materials. In addition, due to its strong hardness and high temperature resistance, tungsten can make the military products have better combat performance. Tungsten products in military use are: tungsten alloy bullets, kinetic energy penetrators.
Tungsten can be used in several fields above, but also in aerospace, navigation, atomic energy, shipping, automobile industry and other fields.