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Tungsten The Use Of
Aug 11, 2017

Tungsten, a metallic element. Atomic number 74, atomic weight 183.84. Steel gray or silvery-white, high hardness, high melting point. Tungsten is used for the manufacture of filament and high-speed cutting alloy steel, superhard molds, but also for optical instruments, Tungsten chemical instruments.

Tungsten is a kind of nonferrous metals. The metal is usually divided into two categories according to the color and nature of metals: ferrous and non-ferrous Metals. Ferrous metal mainly refers to iron, Tungsten manganese, chromium and its alloys, such as steel, pig iron, ferroalloy, cast iron and so on. Ferrous metals are known as non-ferrous metals. Tungsten belongs to the category of nonferrous metals. The strength and hardness of nonferrous alloys are generally higher than pure metal, the resistivity is larger than pure metal, and the resistance temperature coefficient is small, which has good comprehensive mechanical properties. Tungsten Therefore, as a non-ferrous metal, Tungsten tungsten strength and hardness is very high. Because of this characteristic, tungsten carbide with high hardness and strong abrasion resistance is widely used in cutting tools and mining tools.

Tungsten is a strategic metal.Tungsten is an important part of modern High-tech new materials, a series of electronic optical materials, special alloys, new functional materials and organic metal compounds are required to use unique properties of tungsten. Although the dosage is not big, but it is essential. Tungsten It is widely used in modern communication technology, electronic computer, aerospace development, medical and health, photosensitive material, optoelectronic materials, energy materials and catalyst materials.

Tungsten is an important alloying element in iron and steel industry, which can improve the strength, hardness and corrosion resistance of steel. Tungsten carbide (tungsten carbide), Tungsten large hardness, wear resistance, corrosion and heat, used in the manufacture of drill bits, knives and high-temperature-resistant parts. Tungsten-Copper (or tungsten-silver) alloys containing tungsten 60%-90% are excellent contact materials and can be used as keys, knife-shaped switches, circuit breakers and spot welding electrodes. Tungsten-nickel-copper alloys can be used as protective screens for Alpha and gamma rays. In the rocket engine, the non cooled nozzle made of tungsten and tungsten infiltrated copper (silver) is capable of 3,127 ℃ high temperature and pressure and high heat stress. Tungsten High density tungsten alloy is an important material of sabot, and it is also used in bowling, javelin and other sports apparatus. Emitting electrodes and X-ray cathode targets for light-emitting materials in lighting and electronics. Also can be used as high-temperature resistance furnace heating body. The thermocouple of tungsten and tungsten rhenium (26%) alloy can measure the temperature range from room temperature to 2,835 ℃. Tungsten selenide can be used as lubricant of self-lubricating bearing, Tungsten and its lubricating temperature range is 217-350 ℃. The pigments of the tungsten compound are durable.

The pure tungsten can be used to make the cathode of the lamp wire and the Roentgen line tube. Because the tungsten metal is resistant to high temperature and does not deform, Tungsten it is used to make high-speed steel, for industrial use of high-speed cutting tools and military essential material. Sodium tungstate can be used as a mordant for silk fabrics, as a fire retardant for cotton fabrics, as well as as a colorant on glass and earthenware, and as a kind of alloy made of cobalt-chromium-tungsten alloys and other metals for making various alloy bits. 2. The scheelite color is white, also has the yellow brown, the green and the light red and so on. Tungsten Diamond Luster. It is a square crystal system, the formation of double cone-like false eight-body or plate-like crystals, crystal surface sometimes visible oblique stripes, Tungsten which inserted double crystal is more common; Tungsten Hardness 4.5-5; 5.9-6.2. Brittle, shell-shaped or jagged fracture.

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