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Method for preparing single crystal granule tungsten carbide

A technology of single crystal particles and tungsten carbide, applied in chemical instruments and methods, single crystal growth, single crystal growth, etc., can solve problems affecting product quality, poor densification, poor thermal stability, etc., and achieve superior thermal stability , good densification and uniform carbonization

Active Publication Date: 2011-11-23
长沙伟徽高科技新材料有限公司
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Problems solved by technology

[0002] As we all know, my country is rich in mineral resources of non-ferrous metals and rare metals. For a long time, my country has been relying on imports of high-end materials and can only export primary products, mainly because of low technical level and backward production technology, especially the production and processing of tungsten carbide. , the existing tungsten carbide has defects such as poor densification, poor thermal stability, uneven structure, and insufficient grain size, which seriously affects the quality of the product

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  • Method for preparing single crystal granule tungsten carbide

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Embodiment Construction

[0023] The present invention successfully develops single crystal particle tungsten carbide through the method of using additives, using the principle of chemical exothermic reaction, and high-temperature tungsten carbide and casting tungsten carbide production technology. The product quality has reached the international advanced level, and its technical indicators are as follows :

[0024] T.C: 6.08-6.20% Specific gravity: 15.4-15.6g / cm 3

[0025] F.C: 0.10% Hall flow rate: 10.5-14.5s / 50g

[0026] SCOTT (g / cm 3 ):

[0027] WC60-80 WC80-200 WC200-400

[0028] 7.0-7.6 6.8-7.2 6.0-6.6

[0029] Impurity content (not greater than):

[0030] Fe: 0.19% Si: 0.02% Mo: 0.07%

[0031] Ti: 0.15% Ta Ta: 0.03% Nb: 0.03%

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Abstract

The invention relates to a preparation method of a single crystal particle of tungsten carbide and aims at solving the problems of bad densification degree, bad thermal stability, uneven organizational structure and undersize crystal particles of existing tungsten carbide in the current market. By adopting a method that carbon soot is firstly added into a raw material of tungsten powder and an addition agent is then added and scientifically utilizing the principle of the chemical exothermic reaction, high-temperature tungsten carbide and the casting production techniques of tungsten carbide, the preparation method develops the single crystal particle of tungsten carbide with high purity, even carbonization and good densification degree, fills a domestic gap, has the product quality that reaches advanced international standard, and changes the originally domestic situation of the main rely on the exporting of raw materials and low-end products.

Description

Technical field: [0001] The invention belongs to the technical field of non-ferrous metal materials, and in particular relates to a preparation method of single crystal particle tungsten carbide. Background technique: [0002] As we all know, my country is rich in non-ferrous metals and rare metal mineral resources. For a long time, my country has been relying on imports of high-end materials and can only export primary products, mainly because of low technical level and backward production technology, especially the production and processing of tungsten carbide. , the existing tungsten carbide has defects such as poor densification, poor thermal stability, uneven structure, and insufficient grain size, which seriously affects the quality of the product. Invention content: [0003] The purpose of the present invention is to solve the existing technical defects in the production of tungsten carbide according to the above-mentioned inadequacies, and to develop a preparation m...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/36C30B1/10
Inventor 郭伟钟晖刘昭晖
Owner 长沙伟徽高科技新材料有限公司