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Preparation method of graphene-reinforced cobalt-based high-temperature alloy composite

A high-temperature alloy and composite material technology, which is applied in the field of composite materials, can solve the problem that graphene is not easy to disperse, and achieve excellent high-temperature mechanical properties, good reinforcement effect, and high yield

Inactive Publication Date: 2019-02-15
北京石墨烯技术研究院有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the present invention provides a method for preparing a graphene-reinforced cobalt-based superalloy composite material, which solves the problem that graphene is not easily dispersed in cobalt-based superalloys, improves the performance of cobalt-based superalloys, and improves the cobalt-based superalloy. The anti-oxidation ability of cobalt-based superalloys and the performance of other aspects are improved and optimized, which broadens the application field of cobalt-based superalloys

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  • Preparation method of graphene-reinforced cobalt-based high-temperature alloy composite
  • Preparation method of graphene-reinforced cobalt-based high-temperature alloy composite
  • Preparation method of graphene-reinforced cobalt-based high-temperature alloy composite

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preparation example Construction

[0051] A preparation method of a graphene-reinforced cobalt-based superalloy composite material, comprising the following steps:

[0052] S1 prepares cobalt-based superalloy powder and graphene.

[0053] Preferably, the cobalt-based superalloy powder prepared in S1 contains the following components in parts by weight: the content of Co is 40.0-65.0%, the content of Cr is 18.0-24.0%, the content of Ni is 9.0-24.0%, The content of W is 12.0-17.0%, the content of C is 0.05-0.3%, the content of Si is ≤0.5%, the content of P is ≤0.05%, and the content of S is ≤0.05%. Under this condition, the comprehensive consideration of the comprehensive influence of each element in the cobalt-based superalloy on the cost and performance of the cobalt-based superalloy is conducive to the preferred orientation of graphene, which makes graphene produce better reinforcement of the cobalt-based superalloy Effect.

[0054] Wherein, the prepared cobalt-based superalloy powder is cobalt-based superal...

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Abstract

The invention discloses a preparation method of a graphene-reinforced cobalt-based high-temperature alloy composite. The preparation method of the graphene-reinforced cobalt-based high-temperature alloy composite comprises the following steps that (1) cobalt-based high-temperature alloy powder and graphene are prepared; (2) the cobalt-based high-temperature alloy powder and the graphene are mixedto obtain cobalt-based high-temperature alloy powder containing graphene; (3) the cobalt-based high-temperature alloy powder containing graphene is dispersed in absolute ethyl alcohol to prepare cobalt-based high-temperature alloy and absolute ethyl alcohol dispersing liquid; (4) the cobalt-based high-temperature alloy and absolute ethyl alcohol dispersing liquid is dried to obtain a dry powder material; (5) the powder material is ball-milled into powder; and (6) the powder obtained after ball-milling is placed into a steel capsule, the steel capsule is heated to the temperature of 500-800 DEGC, and heat preservation is conducted for 2-5 hours. By adoption of the preparation method of the graphene-reinforced cobalt-based high-temperature alloy composite, the problem that due to the largecharacteristic difference between graphene and a cobalt-based high-temperature alloy matrix, the graphene cannot be evenly dispersed in cobalt-based high-temperature alloy easily is solved, and a newdirection is pointed out for the development of cobalt-based alloy.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a graphene-reinforced cobalt-based superalloy composite material. Background technique [0002] Cobalt-based superalloys are austenitic superalloys with a cobalt content of 40-65%, and have certain high-temperature strength and good thermal corrosion resistance at 730-1100 °C. It is suitable for making guide vanes and nozzle guide vanes of aviation jet engines, industrial gas turbines, ship gas turbines and diesel engine nozzles. [0003] Cobalt-based superalloys have good thermal corrosion resistance, because the melting point of cobalt sulfide (such as Co-Co4S3 eutectic, 877 ° C) is higher than the melting point of nickel sulfide (such as Ni-Ni3S2 eutectic 645 ° C), and sulfur is in The diffusivity in cobalt is much lower than in nickel, and cobalt-based superalloys are superior to nickel-based alloys in terms of hot corrosion resistance. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C19/07C22C30/00B22F3/15B22F9/04
CPCC22C1/05B22F3/15B22F9/04B22F2009/043B22F2998/10C22C19/07C22C30/00B22F1/0003
Inventor 高冉曹振王旭东李炯利李佳惠
Owner 北京石墨烯技术研究院有限公司
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