Vanadium carbide
Molecular formula: VC
Cas: 12070-10-9
Sexual appearance: gray black powder
Melting point: 2800°C
Density: 5.41g/cm3
Application: Good chemical stability and high temperature performance. Used in hard film, target material, welding material, spraying, cutting tools, steel industry, aerospace and other fields.
Product Application:
1. Vanadium carbide, as a grain growth inhibitor, has been widely used in the preparation of ultra-fine cemented carbide. The mechanism of action is as follows: grain growth mainly occurs in the dissolution and precipitation process of WC, WC is dissolved in the liquid phase and precipitated on the larger WC crystal, and the inhibitor changes the interfacial free energy of WC-CO, thereby restricting the dissolvation-precipitation process, reducing the dissolvation-precipitation rate, and slowing down the process of grain growth. According to reports, adding VC can increase the life of cemented carbide by 20%, but the mechanism of action is not clear. Due to the high activity of ultra-fine VC, the speed of atomic migration is fast, it is more conducive to particle diffusion, and it is easier to dissolve in the cobalt phase, thus more effectively preventing the dissolution of tungsten carbide. Therefore, ultra-fine VC is of great significance for the development of ultra-fine cemented carbide. Vanadium carbide has the general characteristics of transition metal carbides such as high hardness, melting point and high temperature strength, and has good electrical and thermal conductivity, so it is widely used in the fields of iron and steel metallurgy, cemented carbide, electronic products, catalysts and high temperature coating materials. Among them, vanadium carbide added to steel can improve the wear resistance, corrosion resistance, toughness, strength, ductility, hardness and thermal fatigue resistance of steel and other comprehensive properties, and make steel has strong weldability, and can play a role in eliminating inclusions, and can be used as a wear-resistant material in different cutting and wear-resistant tools.
2. Vanadium carbide is used in WC-Ni cemented carbide, in which a small amount of vanadium carbide can effectively reduce the Curie point of the alloy, so that the alloy is changed from ferromagnetic to paramagnetic at room temperature. The addition of VC can reduce the saturation magnetization, remanent magnetic force, coercive magnetic force, magnetic energy product, magnetic permeability and Curie temperature of WC-10%Ni cemented carbide, and produce a non-magnetic alloy. The mechanism of action is: the solid solution of VC in the bonding phase increases the atomic distance a of the Ni lattice, so that the ratio of the radius r of the unfilled electron layer of a and Ni increases, and the alloy changes from magnetic to non-magnetic.
3. The solid solution formed by vanadium carbide and other metal carbides is used as a matrix or additive in the production of tungsten-free cemented carbide. If an appropriate amount of vanadium carbide is added, the wear resistance, high temperature strength and high temperature oxidation resistance of TiB2-Fe-Mo cemented carbide can be improved.
4. Vanadium carbide can be used as an effective catalyst, because of its high activity, selectivity, stability and ability to resist catalyst poisoning in hydrocarbon reactions, as a new type of catalyst has been widely used. Like the synthesis of NH3.
5. The main reason for the excellent wear resistance and safety of high vanadium high speed steel is to increase the content of vanadium element, thereby forming a high hardness vanadium carbide. High vanadium high-speed steel, a new type of steel, used for the development direction of new wear-resistant materials, its life is 3 times that of high chromium cast iron and 10 times that of high manganese steel.
6. Vanadium carbide has good morphology (small degree of matrix cleavage) and high hardness (microhardness of vanadium carbide can reach HV2600), which can make 高钒铁 carbon alloy show excellent wear resistance.
7. Foreign countries have recently developed a new method of combining vanadium carbide thin layer with metallurgical method on the surface of the tool, and the efficiency of machining parts with this tool can be increased several times or even dozens of times. This method is to put the tool steel tool in the borate bath containing carbide elements, so that vanadium heat diffusion into the tool steel matrix, and carbon combined. Common base materials are Cr5MoLV and Cr12MoV alloy tool steel. The hardness of this coating is as high as 3200 ~ 3800HV, and it is not easy to peel off, and 20% of the coating thickness (0.014 ~ 0.0125mm) penetrates into the tool surface, so the tool life can be greatly improved.
8. It can be used as raw material for extracting metal pure vanadium.
Packaging and storage: This product is packed in inert plastic bags, sealed and stored in dry and cool environment, should not be exposed to air, prevent moisture oxidation and agglomeration, affect the dispersion performance and use effect; The quantity of packaging can be provided according to customer's request, sub-packaging.
