Tungsten is an important alloying element in the iron and steel industry, which can improve the strength, hardness and corrosion resistance of the steel. Tungsten carbide (tungsten carbide), high hardness, wear resistance, corrosion and heat-resistant, used in the manufacture of drill bits, Tungsten Metals knives and high-temperature-resistant parts. Tungsten-Copper (or tungsten-silver) alloys containing 60%-90% tungsten 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 shields for alpha and gamma rays. In a rocket engine, Non-cooled nozzles made of tungsten and tungsten-infiltrated copper (silver) are capable of 3,127 Shan high temperature and pressure bearing pressures, high-temperature stress. The high-density tungsten alloy is an important material for sabot piercing, which is also used in bowling, Tungsten Metals javelin and other sports apparatus. A light-emitting material emitting electrode and an X-ray cathode target are used in illumination and electronic industry. 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 Shan. Two selenium tungsten can be used as lubricant for self-lubricating bearings, Tungsten Metals The range of lubrication temperature is 217-350 Shan. The pigments of tungsten are durable. The pure tungsten can be used to make the cathode of the lamp and the Roentgen line. Because of the high temperature resistance of tungsten metal and not deformation, so to make high-speed steel, for industrial use of high-speed cutting tools and important military essential materials. Sodium tungstate can be used as a mordant for silk fabrics, as a fire retardant for cotton fabrics, and as a colorant on glass and pottery; Used to make various alloy drills. 2. The scheelite color is white, also has the yellow brown, the green and the light red and so on. Adamantine Luster. It belongs to the square crystalline system,Tungsten Metals which forms a double cone-shaped false eight-body or a plate-like crystal, and sometimes a diagonal stripe is visible on the crystal surface. Among them, the inserted double crystal is more common, and some crystals are skin shell, kidney-like, granular and dense block. Hardness 4.5-5; The 5.2.2 is brittle, shell-shaped or staggered. Light blue can be emitted by cathode rays
The chemical property of tungsten is stable, even in the case of heating, it does not work with hydrochloric acid and sulfuric acid, Tungsten Metals and even in Aqua Regia will not be dissolved. Tungsten extremely high temperature, known as the most difficult to melt metal, melting point of up to 3,410 Shan; the hardness of tungsten in the top of the metal, only heated to a very high temperature, can be processed pressure.
Tungsten has many unique uses, such as tungsten hardness high, can make tungsten steel. With tungsten steel manufacturing tools, the strength of a few times or even dozens of times times higher than the common tool; Tungsten Metals with tungsten carbide to make a barrel, gun barrel, in the continuous shooting, even if the barrel body by the projectile friction hot, still can maintain good elasticity and mechanical strength. Tungsten Metals In the metal cutting machine tool, with tungsten steel knife, the temperature of up to 1000 Shan still can be hard as before. The tungsten-chromium-cobalt alloy steel containing tungsten 3% to 15% is sprayed or surfacing to the surface of ordinary steel parts, which is equal to the hard "armor" of the parts, which can withstand the pressure of temperature, resist corrosion, reduce wear and prolong the service life by dozens of times times. Because of its superior properties and broad use, tungsten, which is produced annually worldwide, is used to make tungsten steel for 90%.
Tungsten has a strong plasticity. A 1-kilogram tungsten rod that can be pulled up about 400 km and a diameter of only 1% millimeters of filament. This filament in 3,000 Shan high-temperature environment, still has a certain intensity, and the luminous rate is high, the service life is long, Tungsten Metals is the manufacture all kinds of bulb filament the good material. Incandescent lamps, tungsten, and even the world's most innovative bulbs, lamps, are made of tungsten.
The United States used a new type of solid fuel to make the rocket gas temperature more than 3,000 Shan. In this case, the most difficult to melt tungsten nozzle is also difficult to parry. Scientists have studied and manufactured a new type of tungsten alloy, "self-cooled porous silver porous tungsten alloy". When a rocket is flying at high speed in the air, a high-temperature high-pressure nozzle made of this new alloy will spray the flames continuously. The silver that infiltrates on the nozzle surface evaporates first at high temperatures and absorbs heat at the same time as evaporation. In this way, to achieve automatic cooling and prevent the high temperature rise, so that the 3,000 Shan high-temperature baking nozzle, still able to maintain the original character.