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Preparation process of low-oxygen vanadium-nitrogen alloy

A preparation process, nitrogen alloy technology, applied in the field of alloy materials, can solve the problems of affecting the use effect of steel, incomplete reduction of vanadium oxide, high residual oxygen content of products, etc.

Active Publication Date: 2022-03-15
江西林力高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vanadium-nitrogen alloy is a new type of steel additive. At present, the production method of vanadium-nitrogen alloy is to compress the oxide of vanadium and carbonaceous reducing agent into a solid state, and then reduce it in a high-temperature, positive-pressure nitrogen atmosphere in a sintering furnace. , Nitriding to produce vanadium-nitrogen alloy; during the reaction process, the carbonaceous reducing agent reduces vanadium oxide to vanadium carbide, and then further nitrides to vanadium-nitrogen alloy. , leading to incomplete reduction of vanadium oxide, high residual oxygen content in the product, and affecting its use in steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation process of a low-oxygen vanadium-nitrogen alloy, the preparation process of the low-oxygen vanadium-nitrogen alloy mainly includes the following preparation steps:

[0025] (1) Grinding: Put vanadium pentoxide in a pulverizer, then add melamine with 0.8 times the mass of vanadium pentoxide and distilled water with 0.3 times the mass of vanadium pentoxide, and grind to particles at an ambient temperature of 10°C The diameter is less than 0.9mm, and the small particles of vanadium pentoxide are prepared. The pair electrons on the amino groups on the melamine, adding distilled water can make the melamine easy to diffuse and coordinate on the active sites formed by the fracture of vanadium pentoxide during the grinding process. , prevent agglomeration during the grinding process of vanadium pentoxide, and accelerate grinding;

[0026] (2) Calcination: Put small particles of vanadium pentoxide in the nitriding furnace, use a vacuum pump to pump air into the nit...

Embodiment 2

[0029] A preparation process of a low-oxygen vanadium-nitrogen alloy, the preparation process of the low-oxygen vanadium-nitrogen alloy mainly includes the following preparation steps:

[0030] (1) Grinding: Put vanadium pentoxide in a pulverizer, then add melamine with 1 times the mass of vanadium pentoxide and distilled water with 0.4 times the mass of vanadium pentoxide, and grind to particles at an ambient temperature of 20°C The diameter is less than 0.9mm, and small particles of vanadium pentoxide are produced;

[0031] (2) Calcination: Put the small particles of vanadium pentoxide in the nitriding furnace, pump the nitriding furnace with a vacuum pump to make the pressure in the nitriding furnace reach 8Pa, then inject nitrogen to make the pressure reach 0.12MPa, and repeat the pumping After 4 times of ventilation, input nitrogen to make the pressure in the furnace reach 0.4MPa, and then calcined at 120°C for 18min, 850°C for 35min, 1150°C for 3h, and 1950°C for 45min t...

Embodiment 3

[0034] A preparation process of a low-oxygen vanadium-nitrogen alloy, the preparation process of the low-oxygen vanadium-nitrogen alloy mainly includes the following preparation steps:

[0035] (1) Grinding: Put vanadium pentoxide in a pulverizer, then add melamine with 1.2 times the mass of vanadium pentoxide and distilled water with 0.4 times the mass of vanadium pentoxide, and grind at an ambient temperature of 10~30°C Until the particle diameter is less than 0.9mm, small particles of vanadium pentoxide are produced;

[0036] (2) Calcination: Put small particles of vanadium pentoxide in the nitriding furnace, use a vacuum pump to pump air into the nitriding furnace to make the pressure in the nitriding furnace reach 10Pa, then feed nitrogen gas to make the pressure reach 0.13MPa, repeat pumping After 5 times of ventilation, input nitrogen to make the pressure in the furnace reach 0.5 MPa, and then calcined at 150°C for 15 minutes, 900°C for 30 minutes, 1200°C for 3 hours, a...

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PUM

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Abstract

The invention discloses a preparation process of a low-oxygen vanadium-nitrogen alloy, and relates to the technical field of alloy materials. When the low-oxygen vanadium-nitrogen alloy is prepared, firstly, vanadium pentoxide is subjected to wet grinding, melamine is added before grinding, small vanadium pentoxide particles are prepared, the ground small vanadium pentoxide particles are placed in a calcining furnace to be subjected to multi-temperature-section calcining, nitrogen-vanadium molten slurry is prepared, finally, the nitrogen-vanadium molten slurry is sprayed, and the low-oxygen vanadium-nitrogen alloy is obtained. And the low-oxygen vanadium-nitrogen alloy is prepared by carrying out spray cooling molding and nitriding on the hedging vanadium molten slurry by using mixed gas of low-temperature carbon dioxide and nitrogen. The low-oxygen vanadium-nitrogen alloy prepared through the method is low in oxygen content, and industrial production is easy.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a preparation process of a low-oxygen vanadium-nitrogen alloy. Background technique [0002] Vanadium-nitrogen alloy is a new alloy additive that can replace ferrovanadium for the production of microalloyed steel. The addition of vanadium nitride to steel can improve the comprehensive mechanical properties of steel such as strength, toughness, ductility and thermal fatigue resistance, and make the steel have good weldability. When the same strength is achieved, the addition of vanadium nitride saves the amount of vanadium added by 30~40%, thereby reducing the cost. [0003] At present, regarding the production methods of vanadium-nitrogen alloys, there are many kinds of reports from relevant parties, and they are different in raw material ratio, preparation process, heating furnace and so on. Vanadium-nitrogen alloy is a new type of steel additive. At present, the produ...

Claims

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Application Information

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IPC IPC(8): C22C1/00B22F9/22B22F9/08C22C27/02
CPCC22C1/00B22F9/22B22F9/082C22C27/025B22F2009/0824
Inventor 余翰林杨陈波邓见超
Owner 江西林力高新材料有限公司
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