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Method for preparing submicron titanium carbide powder

A sub-micron, powder technology, applied in the field of preparation of titanium carbide powder, can solve the problems of high cost and difficult to realize industrialization, and achieve the effect of short process, easy operation and low investment

Active Publication Date: 2012-11-14
长沙伟徽高科技新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are few reports on the preparation of fine-grained TiC at home and abroad, and they mainly focus on gas-phase carbonization and the use of TiCl 4 Carrying out carbonization to prepare TiC, these methods all have the disadvantages of high cost, difficult to realize industrialization, etc.

Method used

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  • Method for preparing submicron titanium carbide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The purchased titanium dioxide (TiO 2 The content is 99.6%, ) (Fsss particle size is 0.82μm) is crushed by airflow, the airflow pressure is 0.8MPa, the airflow is cooled by a compressor, and the temperature of the airflow after cooling is 1-4°C. After several times of crushing, 50 kg of dust-collecting end materials were collected. After crushing, the particle size of titanium dioxide was 0.35 microns, and 22.3 kg of carbon was mixed. The materials were mixed for 6 hours, and the materials were discharged into a vacuum furnace. The vacuum degree is 5Pa, the temperature is 1380°C, and the high temperature holding time is 12 hours. Pass H2 to cool, and the cooling time is 12 hours. Ball mill after discharge. Its Fsss particle size was measured as 0.97 μm by sampling, and its chemical composition met the requirements. See attached table 1 for chemical indicators.

Embodiment 2

[0018] The purchased titanium dioxide (TiO 2 The content is 99.6%, ) (Fsss particle size is 0.85 μm) is air crushed, the air pressure is 0.8 MPa, after repeated crushing, the particle size of titanium dioxide is 0.32 micron. A total of 40 kg of material collected from the dust collection end, 17.8 kg of carbon is mixed, mixed for 6 hours, and the material is discharged into a vacuum furnace. The vacuum degree is 6Pa, the temperature is 1400°C, and the high temperature holding time is 11 hours. Pass H2 to cool, and the cooling time is 12 hours. Ball mill after discharge. Its Fsss particle size was measured as 0.95 μm by sampling, and its chemical composition met the requirements.

[0019] Attached Table 1 Performance Index of Submicron TiC

[0020]

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Abstract

The invention relates to a method for preparing titanium carbide powder. The invention provides a method for preparing submicron titanium carbide powder. The method comprises the following steps: crushing the titanium pigment with a grain size less than 1 micron by utilizing the airflow with a pressure being 0.5-0.8MPa and collecting the titanium pigment with the grain size being 0.2-0.5 microns;uniformly mixing the acquired titanium pigment with carbon black, wherein the ratio of carbon black to titanium pigment is (0.44-0.45):1; performing low-temperature vacuum carburization, for the purpose of preparing the submicron titanium carbide powder, namely the grain size of the submicron titanium carbide powder is less than 1 micron; and the parameter condition of the low-temperature vacuum carburization is as follows: when the vacuum carburization is ended, the vacuum degree is less than 10Pa, the temperature is 1350-1450 DEG C, and the temperature-keeping time is 7-13 hours. The methodhas the advantages that the flow is short, the operation is easily realized, the investment is less, and the like.

Description

technical field [0001] The invention relates to a method for preparing titanium carbide powder. Background technique [0002] The microhardness of TiC is 3200 kg / cm 2 , is the highest among refractory metal carbides. Due to its high microhardness, it has been widely used in cemented carbide. There are two main application areas: 1. As a hard phase, binder phase and other additives wet grinding mixed to prepare steel alloy by sintering, steel alloy is mainly used in wear-resistant parts, corrosion-resistant parts and some special tools; 2. As a solvent, tungsten, tantalum and other solute atoms are solid-solved at high temperature to form composite carbides. These composite carbides are mixed with tungsten carbide, binder and other additives for wet grinding and sintered to prepare cemented carbide blades. [0003] Due to the improvement of application requirements, the metallographic structure of cemented carbide must be more uniform and finer. In order to obtain a cemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/30
Inventor 郭伟
Owner 长沙伟徽高科技新材料有限公司