The Details Of Vanadium Nitrogen Alloy

Vanadium nitrogen alloy is a new type of alloy additive, which can replace ferrovanadium in the production of microalloyed steels. Vanadium nitride is added to steel to improve the strength, toughness, ductility and thermal fatigue resistance of steel, and make the steel have good weldability. At the same strength, the addition of vanadium nitride saves 30-40% of vanadium addition, thereby reducing costs.

Vanadium nitride has two crystal structures: one is V3N, hexagonal crystal structure, extremely high hardness, microhardness of about 1900HV, melting point is unmeasurable; The second is VN, with a density of 6.13 and a relative molecular weight of 64.95. ^[2] Face-centered cubic crystal structure, microhardness of about 1520HV, melting point of 2360 degrees. All of them have high abrasion resistance.

Taking the construction industry as an example, the new tertiary steel bar produced by vanadium nitrogen alloying technology not only enhances the safety and seismic resistance of the building due to its improved strength, but also saves 10%~15% of steel compared with the use of secondary steel bar. For this alone, China can reduce the use of about 7.5 million tons of steel bars every year, about 12.4 million tons of iron ore concentrate is mined, 6.6 million tons of coal are saved, 3.3 million tons of related auxiliary raw materials are saved, and at the same time, the emission of carbon dioxide and sulfur dioxide and other waste gases is greatly reduced, and the dual benefits of resource conservation and environmental protection are obtained.

Application in High-Speed Steel

In recent years, vanadium-nitrogen alloy has also been tried to be applied in the production of high-speed steel. Studies have shown that by adopting vanadium-nitrogen alloying technology and increasing both the vanadium content and nitrogen content, it is possible to save precious alloy elements without sacrificing comprehensive performance, while maintaining comparable comprehensive performance to general high-speed steel.

Potential Applications in Other Fields

In addition to the traditional steel industry, the application of vanadium-nitrogen alloy in aerospace, automotive manufacturing, petrochemical and other fields is gradually increasing. With the improvement of environmental protection requirements, the demand for high-strength low-alloy steel is also increasing, which further promotes the development of vanadium-nitrogen alloy.

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