2013年8月14日星期三

Molybdenum plate, etc. The main purpose of rare metals

 Ji Rui rare limited liability company Reads Tungsten plate, molybdenum plates, tungsten rods, molybdenum rods, tungsten carbide inserts tube, molybdenum tube, tungsten crucible, molybdenum crucibles and other rare metals products, they are about the world molybdenum consumption 6% of the total consumption. Molybdenum melting point, boiling point, high temperature strength, anti-friction, corrosion resistance, thermal conductivity, thermal expansion coefficient, good hardenability, etc., to make it in the aerospace, weapons, electronics, chemical and other fields widely used.
Recycling satellite re-entry, it must overcome the hot air scour. Therefore able to withstand vibration, shock, vacuum, radiation and temperature environment of alternating molybdenum-based alloys used to produce stable satellite recovery tank dress skinning. TZM Molybdenum tube alloy is also used to make space rocket or space shuttle solid rocket motor nozzle, rocket nose cones, the leading edge of aircraft, rudder, heat shield, honeycomb structure.
Not only with the weapons industry molybdenum steel for tank armor, but also use TZM and TZC molybdenum alloy corrosion resistance characteristics, overall turbine impeller as cruise missiles, also used as a high-temperature gas-cooled reactor difficult helium atom turbine impeller.
The electronics industry often use molybdenum melting point, low expansion coefficient and a low rate of secondary electron emission, it is widely used for various tube gate, anode and high electrical power source such as lead. Present study suggests that, to add a small amount of molybdenum silicon, aluminum, potassium allow it to the secondary crystallization temperature is higher than that of pure molybdenum, 700 ℃, up to 1800 ~ 1900 ℃, widely used as a heating element, heat screens.

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