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Micro-nano tungsten/molybdenum/tantalum carbide solid-solution composite powder and preparation method thereof

A technology of composite powder and tungsten carbide, which is applied in the field of powder metallurgy, can solve the problems of affecting the structure of ceramic body, heavy metal segregation, failure to achieve solid solution strengthening, etc., and achieve the effect of uniform distribution

Active Publication Date: 2016-04-13
重庆金锐新材料技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dispersive addition of the second type of metal carbide will easily make the elements in the cermet disperse unevenly, resulting in heavy metal segregation, thereby affecting the structure of the overall ceramic body, and failing to achieve the purpose of solid solution strengthening

Method used

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  • Micro-nano tungsten/molybdenum/tantalum carbide solid-solution composite powder and preparation method thereof
  • Micro-nano tungsten/molybdenum/tantalum carbide solid-solution composite powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Ingredients: Weigh 850g of tungsten powder, 420g of molybdenum powder, 420g of tantalum powder and 150g of graphite powder, and add 75g of cerium oxide powder; the purity of tungsten powder, molybdenum powder, tantalum powder and graphite powder is >99.9%, and the average particle size 20~100μm; the average particle size of cerium oxide powder is less than 20μm;

[0029] (2) High-energy ball milling solid phase reaction: Put the raw materials prepared in step (1) together with tungsten carbide balls into a stainless steel vacuum ball mill tank for high-energy ball milling. The ball-material ratio is 10:1, and the ball milling speed is 300 rpm. The time is 36h, and the mixed powder of (Mo, Ta)C solid solution powder and W+C+(W, Mo, Ta)C is obtained;

[0030] (3) Thermal combination reaction: put the reaction product obtained in step (2) into a high-temperature atmosphere furnace, and carry out a thermal combination reaction at 800°C for 60 minutes in a nitrogen-hydro...

Embodiment 2

[0033] (1) Ingredients: Weigh 1050g of tungsten powder, 410g of molybdenum powder, 510g of tantalum powder and 130g of graphite powder, and add 90g of cerium oxide powder; the purity of tungsten powder, molybdenum powder, tantalum powder and graphite powder is >99.9%, and the average particle size 20~100μm; the average particle size of cerium oxide powder is less than 20μm;

[0034] (2) High-energy ball milling solid phase reaction: Put the raw materials prepared in step (1) together with tungsten carbide balls into a stainless steel vacuum ball mill tank for high-energy ball milling. The ball-material ratio is 6:1, and the ball milling speed is 200 rpm. The time is 24h to obtain (Mo, Ta)C solid solution powder and W+C+(W, Mo, Ta)C mixed powder;

[0035] (3) Thermal combination reaction: put the reaction product obtained in step (2) into a high-temperature atmosphere furnace, and carry out a thermal combination reaction at 900°C for 120 minutes under a nitrogen-hydrogen mixed ...

Embodiment 3

[0037] (1) Ingredients: Weigh 1150g of tungsten powder, 360g of molybdenum powder, 450g of tantalum powder and 140g of graphite powder, and add 90g of cerium oxide powder; the purity of tungsten powder, molybdenum powder, tantalum powder and graphite powder is >99.9%, and the average particle size 20~100μm; the average particle size of cerium oxide powder is less than 20μm;

[0038] (2) High-energy ball milling solid phase reaction: Put the raw materials prepared in step (1) together with tungsten carbide balls into a stainless steel vacuum ball milling tank for high-energy ball milling. The ball-material ratio is 9:1, and the ball milling speed is 300 rpm. The time is 36h, and the mixed powder of (Mo, Ta)C solid solution powder and W+C+(W, Mo, Ta)C is obtained;

[0039](3) Thermal combination reaction: put the reaction product obtained in step (2) into a high-temperature atmosphere furnace, and carry out a thermal combination reaction at 850°C for 90 minutes in a nitrogen-hyd...

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Abstract

The invention discloses micro-nano tungsten / molybdenum / tantalum carbide solid-solution composite powder and a preparation method thereof. The micro-nano tungsten / molybdenum / tantalum carbide solid-solution composite powder is a (W, Mo, Ta) C solid solution body formed by chemically combining tungsten, molybdenum, tantalum and carbon and performing solid solution. The preparation method of the micro-nano tungsten / molybdenum / tantalum carbide solid-solution composite powder comprises the steps of material preparation, high-energy ball milling solid-phase reaction, thermal chemical combination reaction and the like. The micro-nano tungsten / molybdenum / tantalum carbide solid-solution composite powder prepared by means of the preparation method is micro-nano-scale powder and is uniform in distribution.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a micronano tungsten carbide / molybdenum / tantalum solid solution composite powder and a preparation method thereof. Background technique [0002] Metal carbide has a high melting point, hardness, good corrosion resistance and thermal stability, and has been widely used in various fields of industry, especially as processing materials in modern manufacturing industries. [0003] With the rapid development of modern industry, high processing technology requirements such as "precision, high efficiency, flexibility, intelligence, and environmental protection" have been put forward for modern manufacturing. Therefore, high-speed cutting with high efficiency, high precision and high surface quality as the basic characteristics Technology has become an inevitable choice for modern digital high-end manufacturing, and has been more and more widely used. Ti(C,N))-based cermet mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/06C22C29/08C22C1/05
CPCC22C1/055C22C1/058C22C29/06C22C29/08
Inventor 邓莹邓玲张艳华姜中涛姜山于泓涂铭旌
Owner 重庆金锐新材料技术研究院有限公司