Application of molybdenum and molybdenum alloy
The high melting point of molybdenum has become one of the main technical problems in the production of molybdenum. However, for the rapidly developing industry in the 20th century, it is the high melting point that attracts people. Almost every technological leap has something to do with the application of molybdenum. In the 10-20's of the 20th century, when electricity has been applied in industry, molybdenum has always been one of the main metals used in incandescent bulb and other vacuum and gas filled electronic devices. These applications need molybdenum wire, molybdenum sheet, molybdenum strip and molybdenum foil.
In the 1940s and 1950s, a new stage of the scientific and technological revolution emerged, such as supersonic aircraft, rockets and atomic energy, which needed materials to work at 1000-2000 ℃. So molybdenum, tungsten, niobium and tantalum stand out from refractory metals as the most promising four metal structural materials.
In the 1950s and 1960s, the main characteristics of the research work may be to actively explore the composition of heat-resistant molybdenum based alloys, study the alloy properties and formulate the production process.
Since the 1970s, the production of molybdenum and molybdenum based alloys has been carried out either by vacuum melting in electric arc furnace or electron beam furnace or by powder metallurgy. These methods have their own advantages and disadvantages. With the development of various large-scale industrial semi-finished products of molybdenum and molybdenum alloys, such alloys have appeared, which can be used in chemical and petroleum processing industries, die casting machines, high-temperature industrial furnaces and other industrial sectors. In addition, they can also be used as tool materials for pressure processing of steel and alloy.
In aviation and aerospace industry, molybdenum and molybdenum alloy can be used as high temperature resistant parts. Gas turbine blades, guide vanes, nozzles, nose cones, impact engine nozzles, rocket guides and combustion chambers are used in the range of 1000-1650 ℃. It can also be used as high temperature resistant parts of spacecraft such as skin, nozzle, flame baffle and wing surface. Aerospace rocket engineering has become one of the main consumption areas of molybdenum based structural alloys.
ODS Mo, ODS-ZHM and ODS-MHC alloys with high strength and room temperature ductility, and Mo and W alloys with low zinc content (3% mass fraction) will be widely used in industry.
