Properties: Black cubic crystalline powder
Density (g/mL,25/4℃) : 6.13
Melting point (ºC) : 2360
Resistivity (μΩ·cm) : 85
Thermal conductivity (W/(m·K)) : 11.3
Volume expansion coefficient (K-1) : 8.1× 10-6
Microhardness (kg/mm2) : 1310

Structure introduction

Vanadium nitride has two crystal structures: one is V3N, hexagonal crystal structure, extremely high hardness, microhardness of about 1900HV, melting point can not be measured; The second is VN, density 6.13, relative molecular mass 64.95. [2] face-centered cubic crystal structure, microhardness of about 1520HV, melting point of 2360 degrees. They all have high wear resistance.

Vanadium nitride, also known as vanadium nitrogen alloy, is a new alloy additive that can replace iron vanadium for the production of microalloyed steel.

The addition of vanadium nitride to steel can improve the comprehensive mechanical properties such as strength, toughness, ductility and thermal fatigue resistance, and make the steel have good weldability. At the same strength, the addition of vanadium nitride saves the amount of vanadium added by 30-40%, thus reducing the cost. Vanadium nitrogen alloy can be used in structural steel, tool steel, pipe steel, rebar and cast iron. The application of vanadium and nitrogen alloy in high strength and low alloy steel can simultaneously carry out effective vanadium and nitrogen microalloying, promote the precipitation of carbon, vanadium and nitrogen compounds in steel, and more effectively play the role of sedimentation strengthening and refining grains. Vanadium nitrogen alloy has a more effective strengthening and refining grain effect than vanadium iron using vanadium nitrogen alloy can save the amount of vanadium, vanadium nitrogen alloy under the same strength conditions compared with iron vanadium can save 20-40% of vanadium, the use of vanadium nitrogen alloy in order to stable vanadium and nitrogen yield, reduce the performance fluctuations of steel. The use of vanadium-nitrogen alloy is very convenient and the loss is low. High strength moisture-proof packaging, can be directly into the furnace. Vanadium nitride is a better steelmaking additive than 高钒铁. When vanadium nitride is used as an additive, the nitrogen component in vanadium nitride can promote the precipitation of vanadium after hot processing, and make the precipitation particles smaller, so as to better improve the weldability and formability of steel. Used as tungsten carbide raw material to produce wear-resistant and semiconductor films. It is a new and efficient vanadium alloy additive, which can be used to produce high-strength low-alloy steel products such as high-strength welded steel bars, non-tempered steel, high-speed tool steel, high-strength pipeline steel, etc. Vanadium nitrogen alloy can strengthen and refine grains more effectively than iron vanadium, save 30% ~ 50% vanadium than iron vanadium, and play a great role in improving the strength of steel and reducing the cost of steelmaking. Used as tungsten carbide raw material to produce wear-resistant and semiconductor films.

Synthesis method:

1. The stoichiometric carbon and vanadium pentoxide are fully mixed, and the reduction nitriding reaction is carried out at 1250℃ in a chlorine atmosphere to obtain vanadium nitride. It can also be prepared by reaction of nitrogen-hydrogen mixture with vanadium tetrachloride at 1400 ~ 1600℃; Or it is prepared by the reaction of ammonia (NH3) and ammonium metavanadate (NH4VO3) at 1000 ~ 1100℃.

2. Use the reduction method. Vanadium nitride can be prepared by mixing stoichiometric carbon and vanadium pentoxide in nitrogen atmosphere at 1250℃ for reduction nitriding reaction. It can also be prepared by the reaction of nitrogen  hydrogen mixture with vanadium tetrachloride at 1400 ~ 1600℃; Or it is prepared by the reaction of ammonia (NH3) and ammonium metavanadate (NH4VO3) at 1000 ~ 1100℃.