| Customization: | Available |
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| Application: | Aviation, Electronics, Industrial, Medical, Chemical |
| Standard: | ASTM |
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The melting point of tungsten-Mo alloy increases with the increase of tungsten content. When the tungsten content increases to 25%, the melting point of the alloy increases by about 200ºC compared with that of pure molybdenum. Therefore, the corresponding alloy composition can be selected in the range of 2620~3410ºC according to the service temperature and the required melting point of the alloy. This advantage is also one of the advantages that molybdenum - tungsten alloy can be widely used. The lattice constant and density of molybdenum-tungsten alloy increase linearly with the increase of tungsten content. The hardness and strength of W - Mo alloy also increase with the increase of W content. The highest room temperature hardness of the alloy is between 90% and 100% tungsten content, and its Vickers hardness is up to 3530~3860MPa, which is more than twice as high as that of pure molybdenum. Its highest high temperature hardness is between 70% and 85% tungsten content. When the tungsten content increases from 0 to 40%, the tensile strength of processed molybdenum-tungsten alloy at room temperature increases from 617MPa to 900MPa. The common nominals of molybdenum-tungsten alloys are Mo-30W, Mo-50W and Mo-85W, etc.
Editor of Introduction
Molybdenum-tungsten alloys have been discovered for a long time that iron and aluminum oxides can be bound to soil and sediments, and this process may determine the decomposition of molybdenum-tungsten alloys, but few studies have been done to quantify this process. There are also possible indications that Mo and W are bound to organics. The objective of this project is to quantify the molybdenum - tungsten alloy bound iron (an oxide of iron) and organic matter. This will allow a better assessment of the mobility of molybdenum and tungsten in the environment.
Use editing broadcast
Molybdenum and metal alloys play an important role in weapon manufacturing, as well as in cutting-edge fields such as missiles and rockets. In addition, tungsten is used to make filament, heating element of high temperature electric furnace. Molybdenum metal is easy to process into wire, tape, sheet, bar, etc., has a wide range of applications in the electronics industry. Molybdenum wire is used to support the small hook of the heating wire in the light bulb, the gate of the electron tube, etc. Molybdenum, tungsten boat (for vacuum coating)
Editing by nature
Tungsten and molybdenum elements in the same column of the periodic table. They also exhibit the same properties. Two elements with an average crustal concentration of 1.5 parts per million. Molybdenum is an essential nutrient for plants and animals. At high concentrations, molybdenum can cause poisoning which is sometimes the case from alkaline ash leachate. Tungsten is an important strategic metal that is used in a variety of industrial applications. It is usually mined from scheelite, powder CaWO4, optical channel wolframite (iron, manganese) WO4. Tungsten is released into the environment, for example through its use in winter tires and ammunition. In general, the environmental behavior of tungsten is not well known.
Application Editing
Tungsten molybdenum alloy containing 30%(mass) tungsten has excellent resistance to the corrosion of liquid zinc and is used in the manufacture of agitators, pipe and container linings and other components in the zinc refining industry. Due to its high temperature strength, similar performance and smaller proportion than tungsten, tungsten molybdenum alloy can be used as high temperature components of rockets and missiles, tube filaments, parts and other high temperature materials under the corresponding high temperature conditions.
New technology of steel making with scheelite molybdenum oxide
In order to save energy and purify the environment, scheerrite or molybdenum oxide has been used to replace ferrotungsten and ferromolybdenum as additives in direct steelmaking since the early 1980s, and remarkable economic benefits have been achieved. In addition to refining low alloy steel, it can also be used in high alloy steel such as high speed tool steel, die steel, wear resistant steel and other steels. Every use of a ton of scheelite or molybdenum oxide instead of ferro - tungsten or Mo, can reduce the cost of steelmaking 3000 to 4000 yuan, and can save electricity, aluminum metal, improve the working environment. At the same time, the theoretical research of physicochemical process is also carried out, which provides a scientific basis for the further development of direct steelmaking with metal oxides as additives.
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