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Carbon tungsten cobalt composite material and preparation method and application thereof

A composite material, tungsten-cobalt technology, used in other manufacturing equipment/tools, turbines, engine components, etc., can solve the problems of undeveloped high-end tool materials and narrow application range, and achieve increased surface/interface energy, fine and uniform organization , the effect of excellent high temperature wear resistance

Active Publication Date: 2019-01-25
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of tool preparation, although the initial application of turning tools has expanded to other tools such as milling cutters, the scope of application is still narrow, and high-end tool materials have not yet been developed.

Method used

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  • Carbon tungsten cobalt composite material and preparation method and application thereof
  • Carbon tungsten cobalt composite material and preparation method and application thereof
  • Carbon tungsten cobalt composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) In a glove box filled with argon protection, 30% tungsten powder, 55% cobalt powder and 15% graphite powder are mixed by mole percentage to obtain a mixed powder, tungsten powder, cobalt powder and graphite The purity of the powder was 99.9%, 99.8% and 99.5% respectively; the mixed powder was placed in a high-energy ball mill, the mass ratio of the ball and the mixed powder was controlled to be 5:1, the rotation frequency of the high-energy ball mill fixture was 17Hz, and the rotating speed was 1725r / min, high energy ball milling 15h;

[0058] (2) Put the powder obtained after high-energy ball milling in step (1) into a graphite grinding tool, put it into a discharge plasma sintering furnace, and heat it up to 900°C at a rate of 60°C / min for 5 minutes under 40MPa, and the sintering is completed After cooling with the furnace, a bulk carbon-tungsten-cobalt composite material is obtained.

[0059] figure 1 This is the appearance diagram of the carbon-tungsten-cobal...

Embodiment 2

[0062] (1) In a glove box filled with argon protection, 35% tungsten powder, 50% cobalt powder and 15% graphite powder are mixed by mole percentage to obtain a mixed powder, tungsten powder, cobalt powder and graphite The purity of the powder was 99.9%, 99.8% and 99.5% respectively; the mixed powder was placed in a high-energy ball mill, the mass ratio of the ball and the mixed powder was controlled to be 4:1, the rotating frequency of the high-energy ball mill fixture was 18Hz, and the rotating speed was 1650r / min, high energy ball milling 9h;

[0063] (2) Put the powder obtained after high-energy ball milling in step (1) into a graphite grinding tool, put it into a discharge plasma sintering furnace, and heat it up to 800°C at a rate of 100°C / min for 30 minutes under 60MPa, and the sintering is completed After cooling in the furnace, a carbon-tungsten-cobalt composite material is obtained.

[0064] In the carbon-tungsten-cobalt composite material prepared in this example, ...

Embodiment 3

[0066] (1) In a glove box filled with argon protection, 25% tungsten powder, 65% cobalt powder and 10% graphite powder are mixed by mole percentage to obtain a mixed powder, tungsten powder, cobalt powder and graphite The purity of the powder was 99.9%, 99.8% and 99.5% respectively; the mixed powder was placed in a high-energy ball mill, the mass ratio of the ball and the mixed powder was controlled to be 10:1, the rotation frequency of the high-energy ball mill fixture was 15Hz, and the rotating speed was 1600r / min, high energy ball milling 20h;

[0067] (2) Put the powder obtained after high-energy ball milling in step (1) into a graphite grinding tool, put it into a discharge plasma sintering furnace, and heat it up to 1200°C at a rate of 50°C / min for 1min under 10MPa, and the sintering is completed After cooling with the furnace, a carbon-tungsten-cobalt composite material is obtained.

[0068] In the carbon-tungsten-cobalt composite material prepared in this example, th...

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Abstract

The invention relates to a carbon tungsten cobalt composite material and a preparation method and an application thereof. The carbon tungsten cobalt composite material is a ternary composite materialcomposed of tungsten carbide, tungsten cobalt carbide and cobalt in three phases and comprises the following components by molar percentage: 20-35% of tungsten, 50-65% of cobalt, and 1-30% of carbon.The ternary composite material is obtained by high-energy ball milling mechanical alloying and the spark plasma sintering technology combined with in-situ reaction sintering. The prepared bulk carbontungsten cobalt composite material has high hardness and toughness, and has excellent wear resistance at room temperature and high temperature environment. The Vickers hardness is 8.0-11.0GPa, the fracture toughness is 10.0-15.0MPa m1 / 2, and the wear rate is 0.5-4.0*10^6mm3 / (N m). The composite material can be used as a novel high-end tool material with good application prospects.

Description

technical field [0001] The invention relates to the field of hard alloy preparation, in particular to a carbon-tungsten-cobalt composite material and a preparation method and application thereof. Background technique [0002] Tungsten carbide cemented carbide material occupies an important position in the cemented carbide system, and is known as the title of "modern industrial monosodium glutamate". The material has excellent physical properties such as high hardness, high bending strength, chemical stability and strong wear resistance under high temperature environment. It plays an irreplaceable role in the development of global modern industry and has been widely used in All fields of national economy, social life and national defense construction have greatly promoted social progress and economic development. [0003] In order to further apply tungsten carbide-based cemented carbide to the field of high-speed ultra-precision machining instruments, it is imminent to impro...

Claims

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Application Information

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IPC IPC(8): C22C29/06C22C1/05B22F3/105B22F5/00
CPCB22F3/105B22F5/00B22F2003/1051B22F2005/001B22F2009/041B22F2998/10C22C1/051C22C29/06B22F2009/043
Inventor 任富增李小强赵璨璨赵予生
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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