Graphene-modified hard alloy, preparation technology and application thereof

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...

AI Technical Summary

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 carbide, And the particle size of the original carbon powder is large, which is easy to cause segregation, resulting in uneven distribution of carbon content in the final sintered body

The existing industrial route generally requires long-time ball milling to achieve uniform mixing of the two, but the cost is high and the working hours are long

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