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Vanadium nitrogen alloy preparing method

A vanadium-nitrogen alloy and production method technology, applied in the field of vanadium-nitrogen alloy production, can solve the problems of low apparent density of vanadium-nitrogen alloy products, complex production process, long production cycle, etc., achieve uniform temperature distribution in the furnace, shorten production The effect of cycle and easy operation

Inactive Publication Date: 2010-02-03
湖南汉瑞新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, regarding the production methods of vanadium-nitrogen alloys, there are many kinds of reports from relevant parties, and they are different in the ratio of raw materials, preparation process, heating furnace, etc., but in the production process of product blanks, all adopt Water-soluble binder, for wet billet making; the water content in the billet is large, and the billet must be pre-fired during the production process to remove the water and harmful gases in the billet. These two points are the same, so The production process of these vanadium nitrogen alloys is complicated, the production cycle is long, the efficiency is low, the cost is high, and the apparent density of the produced vanadium nitrogen alloy products is small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] According to the raw material ratio requirement of powdery vanadium oxide accounting for 76% and carbonaceous powder accounting for 24%, after mixing and stirring 2000kg powdered vanadium oxide and 640kg carbonaceous powder, apply 50Mpa pressure on the dry powder ball making machine, Carry out dry powder extrusion ball forming; then put the billet into the vacuum intermediate frequency heating reaction furnace, start to evacuate the furnace to 270Pa, and at the same time heat the furnace to the furnace temperature of 900°C for 0.9 hours; then evacuate the furnace Start to feed nitrogen, and carry out the following preparation process under the protection of nitrogen atmosphere: continue to gradually heat the furnace to 1280 ° C, and keep the vacuum in the furnace at 400 Pa, and the carbonization and nitriding reactions of the billet will occur simultaneously in the furnace. The time is 5.4 hours; then continue to increase the temperature in the furnace to 1530°C, and mai...

Embodiment 2

[0026] According to the raw material ratio requirement of ammonium metavanadate accounting for 79% and carbonaceous powder accounting for 21%, 1170kg ammonium metavanadate and 310kg carbonaceous powder are mixed and stirred evenly, and the dry powder is processed by applying 65Mpa pressure on the dry powder ball making machine. Extrusion ball molding; then put the billet into the vacuum intermediate frequency heating reaction furnace, start to evacuate the furnace to 270pa, and at the same time heat the furnace to the temperature of 900°C for 0.8 hours; then start to pass through the furnace Enter nitrogen, and carry out the following preparation process under the protection of nitrogen atmosphere: continue to gradually heat the furnace to 1330 ° C, and keep the vacuum in the furnace at 400 Pa, and the carbonization and nitriding reactions of the billet will occur simultaneously in the furnace for 5.0 Hours; then continue to raise the temperature in the furnace to 1560°C, and m...

Embodiment 3

[0028] According to the raw material ratio requirement that ammonium polyvanadate accounts for 69%, and carbonaceous powder accounts for 31%, 1000kg ammonium polyvanadate and 440kg carbonaceous powder are mixed and stirred evenly, and then on the dry powder pelletizing machine, apply a pressure of 78Mpa to carry out Dry powder extrusion ball forming; then put the billet into the vacuum intermediate frequency heating reaction furnace, start to evacuate the furnace to 270Pa, and at the same time heat the furnace to the temperature of 900°C for 0.6 hours; then start the furnace Introduce nitrogen, and carry out the following preparation process under the protection of nitrogen atmosphere: continue to gradually heat the furnace to 1390°C, and keep the vacuum in the furnace at 400Pa, and the carbonization and nitriding reactions of the billet will occur simultaneously in the furnace. 4.5 hours; then continue to raise the temperature in the furnace to 1580°C, and maintain a positive ...

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Abstract

The invention relates to a vanadium nitrogen alloy preparing method. Powdered vanadium oxide, or ammonium metavanadate or ammonium polyvanadate and carbonaceous powder are uniformly mixed and stirredaccording to the requirement of a raw material formula. After undergoing dry powder extrusion and ball formation on a dry powder balling machine, the mixture is put into a vacuum intermediate-frequency heating reacting furnace. When the furnace is vacuumized to 270 Pa and the temperature in the furnace is raised to 900 DEG C, nitrogen gas is introduced. Under the protection of the nitrogen gas, the following preparation processes are carried out: when the temperature in the furnace is gradually raised to 1000-1400 DEG C and the vacuum degree in the furnace is kept at 400 Pa, carbonization andnitrogenization reactions are carried out; when the temperature in the furnace is raised to 1500-1600 DEG C and the pressure in the furnace is kept at 0.05 MPa, further heating is conducted to improvethe apparent density of a billet; and finally the billet is cooled in a storage cabin inside the furnace to obtain a temperature lower than 100 DEG C, thereby obtaining the vanadium nitrogen alloy product, wherein V is 78-81%, N is 16-19%, C is 2-3%, si. P. L is less than or equal to 0.05%, and the apparent density is 6.3-6.8 g / cm<3>. The method is characterized in that the billet preparation eliminates the use of binder, instead, the dry powder balling machine is used for extrusion and ball formation; and the apparent density of the vanadium nitrogen alloy is great.

Description

1 Technical field [0001] The invention relates to a production method of an additive vanadium-nitrogen alloy for smelting special steel. 2 background technology [0002] At present, regarding the production methods of vanadium-nitrogen alloys, there are many kinds of reports from relevant parties, and they are different in the ratio of raw materials, preparation process, heating furnace, etc., but in the production process of product blanks, all adopt Water-soluble binder, for wet billet making; the water content in the billet is large, and the billet must be pre-fired during the production process to remove the water and harmful gases in the billet. These two points are the same, so The production process of these vanadium-nitrogen alloys is complicated, the production period is long, the efficiency is low, and the cost is high, and the apparent density of the produced vanadium-nitrogen alloy products is small. 3. Contents of the invention [0003] In order to solve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/02C22C27/02C22C35/00
Inventor 喻华
Owner 湖南汉瑞新材料科技有限公司
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