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A kind of preparation method of vanadium nitride alloy

A technology of vanadium nitride alloy and vanadium nitride, applied in metal material coating process, coating, solid-state diffusion coating and other directions, can solve the problems of complex production process, high equipment requirements, long production cycle, etc. The effect of high density, low reaction temperature and low production cost

Inactive Publication Date: 2015-07-29
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation methods of the above-mentioned vanadium nitride alloys have complex production processes, long production cycles, high equipment requirements, relatively high reaction temperatures, and high energy consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing a vanadium nitride alloy. Using powdered vanadium pentoxide and carbon black as raw materials, mix powdered vanadium pentoxide and carbon black according to the mass ratio of 1: (0.33~0.34), add 4~5wt% water of raw materials, mix well, and press to produce Self-reducing balls, put the self-reducing balls into an electric heating furnace, raise the temperature to 620~640°C in a nitrogen atmosphere, and keep it for 2.0~2.5 hours; then raise the temperature to 1250~1280°C, keep it for 2.5~3.0 hours, and cool to room temperature with the furnace Baked at ~100°C. Finally, crush the vanadium nitride out of the furnace, add 2.5-3.0wt% polyvinyl alcohol aqueous solution with a concentration of 4% of the raw material after crushing, stir and mix, and press into balls with a powerful ball press to obtain a vanadium nitride alloy.

[0017] The pressure for pressing into balls is 12-13 MPa, and the pressing is repeated 3 times.

Embodiment 2

[0019] A method for preparing a vanadium nitride alloy. Using powdered vanadium pentoxide and carbon black as raw materials, mix powdered vanadium pentoxide and carbon black according to the mass ratio of 1: (0.34~0.35), then add 5~6wt% water of raw materials, mix well, and press to produce Self-reducing balls, put the self-reducing balls into an electric heating furnace, raise the temperature to 630~650°C in a nitrogen atmosphere, and keep it for 1.5~2.0 hours; then raise the temperature to 1270~1300°C, keep it for 2.0~2.5 hours, and cool to room temperature with the furnace Baked at ~100°C. Finally, crush the vanadium nitride out of the furnace, add 2.0-2.5wt% of the raw material to a 4% polyvinyl alcohol aqueous solution, stir and mix, and press into balls with a powerful ball press to obtain a vanadium nitride alloy.

[0020]The pressure for pressing into balls is 13-14 MPa, and the pressing is repeated twice.

[0021] In this specific embodiment, the vanadium nitride al...

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Abstract

The invention relates to a preparation method of vanadium nitride alloy. Its technical scheme is: use powdery vanadium pentoxide and carbon black as raw materials, mix powdery vanadium pentoxide and carbon black according to the mass ratio of 1: (0.33~0.35), and then add 4~6wt% water of raw materials, Mix well, press into self-reducing balls, put the self-reducing balls into an electric heating furnace, raise the temperature to 620~650°C in a nitrogen atmosphere, and keep it for 1.5~2.5 hours; then raise the temperature to 1250~1300°C, keep it for 2~3 hours, Cool with the furnace; finally crush the vanadium nitride after being released from the furnace, add 2~3wt% of the raw material to a 4% polyvinyl alcohol aqueous solution after the crushing, stir and mix, and press into balls with a strong ball press to obtain vanadium nitride alloy. The pressure for pressing into balls is 12-14 MPa, and the pressing is repeated 2-3 times. The invention has the characteristics of simple process, strong operability, short production period, low energy consumption and low production cost, and the prepared vanadium nitride alloy has stable quality, high nitrogen content and high apparent density.

Description

technical field [0001] The invention belongs to the technical field of metallurgy. Specifically relates to a preparation method of vanadium nitride alloy. Background technique [0002] At present, 80-90% of vanadium nitride alloys are used in the iron and steel industry. High-purity vanadium nitride alloys are mainly used in micro-alloyed steels such as alloy steels, wear-resistant steels, and construction steels. The vanadium added to the steel reacts with carbon and nitrogen to precipitate nitride, carbide and carbonitride second-phase particles at a lower temperature, which can refine the grain and precipitate strengthening of the steel, and improve the wear resistance of the steel Comprehensive mechanical properties such as toughness, toughness, strength, ductility and fatigue resistance. Compared with vanadium iron, vanadium nitride alloy can strengthen and refine the grain more effectively, and the nitrogen brought into the steel by vanadium nitride alloy can promot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/10C22B34/22C23C8/24
Inventor 董江余岳蒋跃东薛正良
Owner WUHAN UNIV OF SCI & TECH