Graphene-modified hard alloy, preparation technology and application thereof

A graphene modification and cemented carbide technology, applied in the field of cemented carbide and its preparation technology, can solve the problem of large difference in density between carbon powder and cemented carbide, uneven distribution of carbon content in sintered body, large particle size of original carbon powder, etc. problems, to achieve uniform carbon content, overcoming poor uniformity of addition, ultra-high mechanical strength and flexibility

Active Publication Date: 2012-10-10
SUZHOU OUMEIKE CARBIDE TOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the carbon content in cemented carbide is mainly mixed directly into cemented carbide powder in the form of direct carbon powder addition, and good mixing and dispersion with cemented carbide powder can be achieved through ball milling. However, due to the large difference in density between carbon powder and cemented carb...

Method used

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  • Graphene-modified hard alloy, preparation technology and application thereof
  • Graphene-modified hard alloy, preparation technology and application thereof
  • Graphene-modified hard alloy, preparation technology and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Example 1: Graphene oxide, which accounts for 0.5% of the weight of the cemented carbide powder, is dispersed in ethanol by ultrasonic, then the YG8 cemented carbide powder is added and mixed, ball milled in a planetary ball mill at 200 rpm for 24 hours, then vacuum-dried and mixed with 3wt % polyvinyl alcohol binder granulation, 350 MPa compression molding, 0.5 ℃ / min heating to 350 ℃ degreasing for 3 hours, 1350 ℃ vacuum sintering densification, obtained graphene modified cemented carbide, its structure and mechanical properties see performance figure 2 and Table 1.

Embodiment 2

[0037] Example 2: The difference between this embodiment and embodiment 1 is that the amount of graphene oxide added is 0.25% of the weight of the cemented carbide powder, and its structure and mechanical properties refer to image 3 and Table 1.

Embodiment 3

[0038] Example 3: The difference between this example and Example 1 is that the amount of graphene oxide added is 0.75% of the weight of the cemented carbide powder, and its mechanical properties are shown in Table 1.

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Abstract

The invention discloses a grapheme-modified hard alloy, a preparation technology and an application thereof. The preparation technology comprises the steps of: uniformly dispersing a graphene material, especially uniformly dispersing graphene oxide into an inorganic solvent and/or organic solvent to form graphene dispersing liquid, and then mixing with hard alloy powder, and ball-milling, drying, pelleting, pressing and molding, degreasing and sintering in sequence to prepare a target product. The graphene oxide has good dispersibility in the solvent, so that the graphene oxide can be well wrapped on the surface of the hard alloy powder due to a huge surface area, and can be well dispersed and combined with the hard alloy in the subsequent molding process; meanwhile, the carbon content of the hard alloy can be adjusted by adding the high-activity graphene oxide, and mechanical enhancement of the graphene oxide on the hard alloy can be achieved. The preparation technology disclosed by the invention can be integrated with the conventional industrial preparation route of the hard alloy and is suitable for industrial production, and the overall performance of the hard alloy is obviously improved.

Description

technical field [0001] The invention relates to a cemented carbide and a preparation process thereof, in particular to a graphene-modified cemented carbide and a preparation method and application thereof. Background technique [0002] Cemented carbide is known as "industrial teeth". It is a cermet composite material sintered from carbide hard phase and metal bonding phase. It has excellent characteristics such as high hardness, high strength, good wear resistance, and high red hardness. Key materials in machining, mining drilling, industrial equipment and other fields. At present, the carbon content in cemented carbide is mainly mixed directly into cemented carbide powder in the form of direct carbon powder addition, and good mixing and dispersion with cemented carbide powder can be achieved through ball milling. However, due to the large difference in density between carbon powder and cemented carbide, Moreover, the particle size of the original carbon powder is large, wh...

Claims

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Application Information

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IPC IPC(8): C22C29/00C22C1/05C22C1/10
Inventor 王永富陈名海
Owner SUZHOU OUMEIKE CARBIDE TOOL
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