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Nitrided ferrovanadium alloy and preparation method thereof

A technology for nitriding vanadium ferrous alloys and compounds, which is applied in the field of vanadium nitride ferroalloy and its preparation, can solve the problems of low nitrogen content, complicated process, no mention of the purity of ferrovanadium nitride, etc., and achieves improved purity and simple process. , the effect of reducing the content

Inactive Publication Date: 2021-02-05
HUNAN ZHONGXIN NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also has problems such as complex process and low nitrogen content.
CN109182887A discloses a preparation method of vanadium-iron nitride alloy, the nitrogen content of the obtained vanadium-iron alloy is relatively high, but it does not mention the purity of the obtained vanadium-iron nitride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the vanadium-iron alloy of the present embodiment comprises the following steps:

[0033] (1) Add vanadium pentoxide, ferric oxide, and oxalic acid into deionized water, and stir to obtain a mixed solution; wherein, the molar ratio of vanadium, iron, and reducing agent is 4:1:0.7;

[0034] The concentration of vanadium ions in the mixed solution is 0.3mol / L; if the concentration is too low, the output will be reduced, and if the concentration is too high, the formation of gel will be unfavorable; the stirring rate is 500rpm / min.

[0035] (2) Add citric acid to the obtained mixed solution, carry out ultrasonic stirring reaction for 2 hours, and obtain a uniform sol;

[0036] The ratio of the amount of citric acid to the amount of metal ions in the mixed solution in the step (2) is 3:1.

[0037] A uniform mixed material can be obtained by using the solution-gel method, which can significantly improve the stability of the mixed material and incre...

Embodiment 2

[0044] The preparation method of the vanadium-iron alloy of the present embodiment comprises the following steps:

[0045] (1) Add ammonium metavanadate, ferric oxide, and oxalic acid into deionized water, and stir to obtain a mixed solution; wherein, the molar ratio of vanadium element, iron element, and reducing agent is 4:1.1:0.8;

[0046] The concentration of vanadium ions in the mixed solution is 0.4mol / L; if the concentration is too low, the output will be reduced, and if the concentration is too high, the formation of gel will be unfavorable; the stirring speed is 800rpm / min.

[0047] (2) Add citric acid to the obtained mixed solution, carry out ultrasonic stirring reaction for 3 hours, and obtain a uniform sol;

[0048] The ratio of the amount of citric acid to the amount of metal ions in the mixed solution in the step (2) is 2:1.

[0049] A uniform mixed material can be obtained by using the solution-gel method, which can significantly improve the stability of the mi...

Embodiment 3

[0056] (1) Add vanadium dioxide, ferric oxide, and formic acid into deionized water, and stir to obtain a mixed solution; wherein, the molar ratio of vanadium element, iron element, and reducing agent is 4:1.1:0.7;

[0057] The concentration of vanadium ions in the mixed solution is 0.4mol / L; if the concentration is too low, the output will be reduced, and if the concentration is too high, the formation of gel will be unfavorable; the stirring speed is 800rpm / min.

[0058] (2) Add citric acid to the obtained mixed solution, carry out ultrasonic stirring reaction for 3 hours, and obtain a uniform sol;

[0059] The ratio of the amount of citric acid to the amount of metal ions in the mixed solution in the step (2) is 3:1.

[0060] A uniform mixed material can be obtained by using the solution-gel method, which can significantly improve the stability of the mixed material and increase the nitrogen content.

[0061] Ultrasonic frequency is 22KHz.

[0062] (3) drying the sol obta...

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PUM

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Abstract

The invention discloses a nitrided ferrovanadium alloy and a preparation method thereof. The preparation method of the nitrided ferrovanadium alloy comprises the following steps that (1), a vanadium source compound, an iron source compound and a reducing agent are added into deionized water, and stirring is carried out to obtain a mixed solution; (2), citric acid is added into the obtained mixed solution, and ultrasonic stirring reaction is carried out to obtain uniform sol; (3), the obtained sol is dried to obtain dry gel, and the dry gel is ground into powder to obtain solid powder; and (4),graphene is added into the obtained solid powder, the solid powder is roasted for more than 6 hours at the temperature of 350-380 DEG C in a nitrogen atmosphere, and quenched to room temperature to obtain the nitrided ferrovanadium alloy. According to the nitrided ferrovanadium alloy and the preparation method thereof, in the obtained nitrided ferrovanadium alloy, the weight percentage of a vanadium element is 69.0-72.0%, and the weight percentage of a nitrogen element is 17.5-18.0%; and the balance is iron and inevitable impurities, and the purity of the alloy is greater than 99.0%.

Description

technical field [0001] The invention relates to the field of alloy preparation, in particular to a ferrovanadium nitride alloy and a preparation method thereof. Background technique [0002] Nitrogen has an excellent strengthening effect on the precipitation of carbonitrides in microalloyed steels. Adding nitrogen in steel has the following effects: (1) can significantly improve the toughness and plasticity of steel, (2) can improve the thermal strength and creep resistance of steel, (3) can change the interphase distribution of vanadium, (4) can improve The lasting strength of steel. At present, the methods of nitriding in steel mainly include adding ferrovanadium nitride, vanadium nitride, ferrovanadium, nitrogen-enriched ferromanganese, ferrosilicon nitride and so on. [0003] Ferrovanadium nitride is a new vanadium-nitrogen alloy additive with better performance than ferrovanadium and vanadium nitride. It is widely used in high-strength threaded steel bars, high-streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/16C22C35/00C22C1/10
CPCC22C1/1026C22C29/16C22C35/00
Inventor 张春雨
Owner HUNAN ZHONGXIN NEW MATERIALS TECH