Method for preparing silicon vanadium nitride

A technology of silicon vanadium nitride and vanadium pentoxide, applied in the field of alloy smelting, can solve the problems of high production cost, high residual oxygen content, incomplete reaction, etc., achieve short production time, good alloying effect, and low equipment requirements Effect

Active Publication Date: 2019-06-07
UNIV OF SCI & TECH BEIJING
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  • Application Information

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Problems solved by technology

Chinese patent ZL201110000948.3 discloses a production method of ferrosilicon nitride. The raw material is vanadium oxide or ferrovanadium; vanadium oxide and ferrosilicon are calcined together to obtain ferrosilicon nitride products, but there is insufficient nitrogen enrichment and the reaction is not complete. , high residual oxygen content and other problems; ferrosilicon reacts with ferrosilicon to improve product quality, but the production cost is too high

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  • Method for preparing silicon vanadium nitride
  • Method for preparing silicon vanadium nitride

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Take vanadium pentoxide 20g, silicon dioxide 0.5g, carbon black 5.4g, mix and briquette;

[0037] (2) Put the pressed sample in step (1) into a high-temperature furnace, heat to 1400° C. under a nitrogen atmosphere, and keep it warm for 5 hours; the product silicon vanadium nitride is obtained after the reaction is completed.

[0038] The test results show that the vanadium content in the product is 76.1%, the silicon content is 1.4%, and the nitrogen content is 17.6%.

Embodiment 2

[0040] (1) Take vanadium pentoxide 20g, silicon dioxide 3g, carbon black 6.3g, mix and briquette;

[0041] (2) Put the materials in the step (1) into a high-temperature furnace, heat to 1500° C. under a nitrogen atmosphere, and keep the temperature for 4 hours; after the reaction, the product silicon vanadium nitride is obtained.

[0042] The test results show that the vanadium content in the product is 67.3%, the silicon content is 8.2%, and the nitrogen content is 20.8%.

[0043] figure 1 It is the XRD pattern of the silicon nitride vanadium product obtained in embodiment 2, as can be seen from the figure, the main composition of product is VN and Si 3 N 4 , silicon to Si 3 N 4 Exist in the form of , greatly improve the nitrogen content of the product.

Embodiment 3

[0045] (1) Take vanadium pentoxide 20g, silicon dioxide 4g, carbon black 6.8g, mix and briquette;

[0046] (2) Put the materials in the step (1) into a high-temperature furnace, heat to 1600° C. under a nitrogen atmosphere, and keep the temperature for 3 hours; after the reaction, the product silicon vanadium nitride is obtained.

[0047] The test results show that the vanadium content in the product is 64.3%, the silicon content is 10.6%, and the nitrogen content is 22.6%.

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Abstract

The invention provides a method for preparing silicon vanadium nitride, and relates to the technical field of alloy smelting. The method has the advantages of low raw material cost, simple process route, short production time, and low equipment requirement, and can obtain silicon vanadium nitride products with higher nitrogen content and better alloying effects. The method comprises the followingsteps: S1, uniformly mixing a vanadium source, a silicon source and carbon powder for later use; and S2, calcining the mixed material obtained in S1 in a nitrogen atmosphere to obtain silicon vanadiumnitride. The technical solution provided by the invention is applicable to a preparation process of silicon nitride vanadium.

Description

【Technical field】 [0001] The invention relates to the technical field of alloy smelting, in particular to a method for preparing silicon vanadium nitride. 【Background technique】 [0002] In vanadium-containing microalloy steel, nitrogen is a beneficial element. The strengthening effect of vanadium on steel is realized by forming vanadium carbonitride. Nitrogen in steel can promote the precipitation of vanadium, and the precipitated vanadium nitride can inhibit The grain grows, which has the effect of precipitation strengthening and fine grain strengthening. It can improve the strength and toughness of steel and optimize the performance of steel. Compared with the addition of ferrovanadium, the addition of nitrogen-vanadium alloy can save a lot of vanadium consumption and reduce the cost of alloying. [0003] The commonly used method for increasing nitrogen in steel is to add nitrides into molten steel when tapping the steel. The theoretical mass percentage of nitrogen in s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/622
Inventor 张国华周英聪徐瑞
Owner UNIV OF SCI & TECH BEIJING
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