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Tungsten plate, molybdenum plate, tungsten rod, tungsten crucible, molybdenum crucible uses |
They account for about 6% of the world total molybdenum consumption. Molybdenum has many advantages, such as high melting point and boiling point, good high temperature strength, anti-friction and corrosion resistance, high thermal conductivity, small thermal expansion coefficient and good hardenability, which make it widely used in aerospace, weapons, electronics, chemical industry and other fields. Thermal scour must be overcome when a recovered satellite reenters the atmosphere. Therefore, it is required to withstand the environment of vibration, impact, vacuum, radiation and temperature alternation. Molybdenum alloy is commonly used to make the skin of the stabilized skirt of satellite recovery module. TZM molybdenum alloy is also used in the production of space rocket or space shuttle solid fuel rocket engine nozzle, rocket nose cone, aircraft leading edge, rudder, heat shield, honeycomb structure and so on. In the ordnance industry, not only molybdenum steel is used as tank armor, but also TZM and TZC molybdenum alloy are used as integral turbine impeller of cruise missile and helium turbine impeller which is difficult to react with high temperature air cooled atom. Tungsten plate, molybdenum plate, tungsten rod, molybdenum rod, tungsten tube, molybdenum tube, tungsten crucible, molybdenum crucible In the electronic industry, molybdenum is widely used as the gate and screen of various electronic tubes and the power outlet line of advanced electric light source due to its high melting point, low expansion coefficient and low secondary electron emissivity. It is believed that adding a small amount of silicon, aluminum and potassium to molybdenum can make its secondary crystallization temperature 700℃ higher than pure molybdenum, up to 1800~1900℃, widely used as heating element, heat insulation screen and so on. The corrosion resistance of molybdenum is often exploited by the chemical industry. Molten glass corrodes most metals, except molybdenum and platinum. Platinum is so expensive that molybdenum or molybdenum alloys containing 30% tungsten are often used instead as electrodes in glass furnaces. Melting, full melting liquid metal: 1059 ℃ lead, 1430℃ bismuth, 999℃ lithium, 599℃ mercury, 899℃ potassium and sodium, 850℃ zinc, at this time, molybdenum corrosion resistance and high temperature strength and other advantages determine that it is the best material choice, and has been widely used. Molybdenum and molybdenum base alloys are widely used in the manufacture of sulphuric acid heat exchangers and valves. Molybdenum is more widely used in the processing industry. The die used at high temperature is heated and the mechanical alternating stress results in the material fatigue crack. By using molybdenum or molybdenum base alloy with low thermal expansion coefficient, high thermal conductivity and high temperature strength, the die life can be greatly extended. When G.K.N company of Britain die-casting hand watch case and other exquisite parts, the life can reach 5000 times, generally 3000 times, the bearing production using molybdenum alloy mold than the original high speed steel, bearing steel mold life increased 15 times. The mould of molybdenum alloy can be used at 1200℃ when isothermal forging refractory superalloy. Because of its high hardness and high resistance to cold and hot fatigue strength, molybdenum base alloy is often used as the head and mold of seamless pipe punch, and its life is hundreds of times higher than that of 3Cr2W8V die steel. Tungsten plate, molybdenum plate, tungsten rod, molybdenum rod, tungsten tube, molybdenum tube, tungsten crucible, molybdenum crucible Abroad, the annual consumption of molybdenum for automobile piston rings and cylinder walls has reached more than 600 t. Molybdenum has a high reflectivity to laser, so it is not easy to be damaged by laser, the United States is using it to develop the diameter of 2.5m, the thickness of 13mm laser mirror. According to R.M. Jones (Jouns), molybdenum and quartz are so close to each other in thermal conductivity and expansion that they are ideal for making envelopes for silicon chips, the heart of giant computers. Molybdenum is also a good spraying material, which can greatly improve the corrosion resistance and prolong the life of parts sprayed. Tungsten plate, molybdenum plate, tungsten rod, molybdenum rod, tungsten tube, molybdenum tube, tungsten crucible, molybdenum crucible http://www.youyouwudao.com |