Preparation method of nano chromium carbide powder

A technology of nano-chromium carbide powder, which is applied in the field of production of nano-chromium carbide powder, can solve the problems of complex process, long time period, and unfavorable industrialization promotion, and achieve good dispersion effect

Inactive Publication Date: 2016-07-06
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process of this method is complex and the time period is long, which is not conducive to industrialization

Method used

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  • Preparation method of nano chromium carbide powder
  • Preparation method of nano chromium carbide powder

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Effect test

Embodiment 1

[0018] Weigh 0.025 moles of chromium nitrate, 0.1 moles of glycine, and 0.025 moles of carbon source, dissolve various raw materials in deionized water to prepare a mixed solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, the precursor powder is obtained, and the precursor powder is reacted for 3 hours at 600°C in an argon atmosphere to obtain nano-chromium carbide powder.

Embodiment 2

[0020] Weigh 0.025 mol of chromium nitrate, 0.025 mol of glycine, and 0.0125 mol of carbon source, dissolve various raw materials in deionized water, prepare a mixed solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, the precursor powder is obtained, and the precursor powder is reacted at 900 ° C for 2 hours under the conditions of argon atmosphere to obtain nano-chromium carbide powder.

Embodiment 3

[0022] Weigh 0.025 mol of chromium nitrate, 0.1 mol of glycine, and 0.0375 mol of carbon source and dissolve them in distilled water to prepare a solution, and heat the solution on a temperature-controllable electric furnace. The solution reacts after undergoing a series of processes such as volatilization, concentration, and decomposition to obtain a precursor powder. The precursor powder is reacted in a furnace at 800°C and nitrogen atmosphere for 1.5 hours to obtain nano-chromium carbide powder.

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Abstract

The invention relates to a preparation method of nano chromium carbide powder, which belongs to the technical field of nano powder preparation. The process is as follows: (1) make a solution of chromium nitrate, glycine and carbon source according to a certain ratio; (2) heat and stir, the solution is volatilized, concentrated and then decomposed to obtain the precursor powder; (3) the precursor powder is heated at 600 Within the temperature range of ~1000°C, react in a certain protective atmosphere for 0.5-3 hours. The invention has the advantages of simple process, low cost and easy industrial production, and the particle size of the obtained chromium carbide powder is less than 100nm, and the dispersibility is good.

Description

technical field [0001] The invention belongs to the technical field of nano powder preparation, and in particular relates to a production method of nano chromium carbide powder. Background technique [0002] Chromium carbide (Cr 3 C 2 ) is widely used in many industries such as powder metallurgy, electronics, catalysts, high-temperature coating materials, etc. production area. In cemented carbide production, chromium carbide is used as WC cemented carbide grain growth inhibitor. With the application of ultra-fine cemented carbide, the requirements for nano-chromium carbide are becoming more and more urgent. Chromium carbide is not only used as an additive in the production of cemented carbide to refine the hardness, but also used to prepare thermal spray powder for wear protection of high temperature components. When smelting some special steels such as high-strength low-alloy steel and high-strength wear-resistant steel, Cr 3 C 2 It can effectively promote their grai...

Claims

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Application Information

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IPC IPC(8): C01B31/32B82Y30/00C01B32/942
CPCC01P2002/72C01P2004/03C01P2004/64
Inventor 秦明礼张德印贾宝瑞曹知勤曲选辉
Owner UNIV OF SCI & TECH BEIJING
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