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A quick overview of molybdenum carbide

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Update time : 2021-08-11 10:03:27
Molybdenum carbide properties
The chemical formula of molybdenum carbide is MoC and the molecular weight is 107.95.
It has the characteristics of high melting point and hardness, good thermal and mechanical stability, and good corrosion resistance. Its melting point is 2692°C. Insoluble in water and lye, slightly soluble in nitric acid, sulfuric acid and hydrofluoric acid.
The main catalytic reaction types of molybdenum carbide:
1. Hydrogenation reaction;
2. Hydrodesulfurization HDS and hydrodenitrogenation HDN reaction;
3. Isomerization reaction;
4. Hydrocarbon conversion and synthesis reaction;
5. Application in ammonia synthesis
Preparation of molybdenum carbide
Preparation principle: Mo+C→MoC
The two elements are directly combined or prepared by the reaction of molybdenum oxide and molybdate in a reducing atmosphere at about 800°C.


Application of Molybdenum Carbide
From the perspective of the global consumption structure, molybdenum is indeed an ally of iron. 80% of the demand for molybdenum in western developed countries comes from steel, stainless steel absorbs 30% of molybdenum, low-alloy steel absorbs 30%, drill bits and cutting tools account for 10%, and cast steel accounts for 10%. Another 20% of molybdenum consumption is in molybdenum chemicals, molybdenum-based lubricants and petroleum refining. Quite typically, the proportion of molybdenum consumption in steel production in the United States in 1998 was 75%.
In addition, molybdenum-based alloys are increasingly used in electronics, metal processing and aerospace industries.
1. Molybdenum alloy
TZM alloy has excellent high strength and comprehensive properties, and is the most widely used molybdenum alloy. The United States uses TZM alloy to make turbine disks for engines, and the amount of molybdenum used accounts for 15% of the total amount of molybdenum. my country's production of molybdenum materials including TZM molybdenum alloy is no less than 22 grades. In the early 1990s, the output of molybdenum and molybdenum products in my country was nearly 200 tons.
The high mechanical properties of TZM and TZC molybdenum alloys are better than those of pure molybdenum, and they are widely used in the manufacture of high-tech, molds and various structural parts. As early as the 20th century, our country has successfully made them into the hot perforated plugs of various seamless steel pipes. This kind of sintered molybdenum plug manufactured by powder smelting technology reduces the consumption of raw materials (50% of the as-cast state), and the average service life is increased by 1.5 to 2 times.
The seamless tube made of molybdenum rhenium alloy (containing 50% Re) has excellent high performance and can be used at a temperature close to its melting point. It can be used as the bracket, ring, grid and other parts of the thermowell and the cathode of the electron tube.
Molybdenum and molybdenum alloys not only have high strength, good electrical and thermal conductivity, and low thermal expansion coefficient (similar to that of electron tube glass), but also have the advantage of being easier to process than tungsten. Therefore, plates, strips, foils, etc. produced by conventional processing methods Tubes, rods, wires and profiles, etc. are used in electronic tubes (grid and anode), electric light source (support material) parts, metal processing tools (die-casting and extrusion dies, forging dies, perforated plugs, liquid metal filter screens) and turbine discs, etc. Widely used in components.
2. Alloying elements of steel
As an ally of steel, molybdenum, together with nickel and chromium, as an alloying element can reduce the embrittlement that often occurs in alloy steels during heat treatment. Using molybdenum instead of tungsten in high-speed steel to solve the shortage of tungsten resources, the United States has taken the lead. According to calculations, molybdenum has twice the "capacity" of tungsten. In this way, the steel containing 18% tungsten can be replaced by the steel containing 9% molybdenum (chromium and vanadium are added at the same time), which greatly reduces the production cost of steel. The role of molybdenum in stainless steel is to improve corrosion resistance, increase high strength and improve weldability. It can be seen that molybdenum plays an extraordinary role in the steel industry.
3. other uses
Molybdenum has a very low vapor pressure under the working temperature and pressure of the vacuum furnace. Therefore, the molybdenum parts have the least pollution to the workpieces or working substances in the furnace, and the evaporation loss will certainly not restrict the service life of high molybdenum parts such as heating elements and thermal insulation encapsulation.
The high strength of molybdenum in the manufacture of glass products makes it the most ideal electrode and processing and processing equipment during rapid heating. Molybdenum is chemically compatible with most glass components, and will not cause harmful color effects due to a small amount of molybdenum dissolved in the glass melting tank. As a heating electrode in a glass melting furnace, its life span can be as long as 3 to 5 years.
TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years’ experience in providing super high-quality chemicals and Nanomaterials. The molybdenum carbide produced by our company has high purity, fine particle size and impurity content. Please contact us if necessary.

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