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A kind of graphene-enhanced 20crmnti alloy steel and preparation method thereof

A technology of graphene and alloy steel, which is applied in the field of graphene-enhanced 20CrMnTi alloy steel and its preparation, which can solve the problems of easy agglomeration of graphene, uneven dispersion, and high cost of graphene preparation, and achieve enhanced wear resistance and excellent comprehensive performance , Improve the effect of reunion phenomenon

Active Publication Date: 2022-08-02
BEIJING NAT INNOVATION INST OF LIGHTWEIGHT LTD +1
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Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a graphene-reinforced 20CrMnTi alloy steel and its preparation method to solve the problem of high cost of graphene preparation in the prior art, easy agglomeration and uneven dispersion of graphene in the metal matrix The problem

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  • A kind of graphene-enhanced 20crmnti alloy steel and preparation method thereof
  • A kind of graphene-enhanced 20crmnti alloy steel and preparation method thereof
  • A kind of graphene-enhanced 20crmnti alloy steel and preparation method thereof

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preparation example Construction

[0037] On the other hand, the present invention discloses a preparation method of graphene / 20CrMnTi alloy steel, comprising the following steps:

[0038] S1: Microwave heating of expandable graphite to obtain vermicular expanded graphite;

[0039] S2: ultrasonically exfoliating and homogenizing the expanded graphite in anhydrous ethanol, and assisting mechanical stirring during the ultrasonic exfoliation to obtain a graphene suspension;

[0040] S3: In a fume hood, the graphene suspension is subjected to acid-base neutralization treatment, the pH value is adjusted to 6-8, and centrifugal cleaning is performed for several times, and finally dried;

[0041] S4: use a planetary ball mill to perform high-energy ball milling on the dried graphene and 20CrMnTi powder in step S3 to obtain a mixed powder;

[0042] S5: Put the mixed powder obtained in step S4 into a graphite mold, place the mold in a hot-pressing furnace, perform hot-pressing sintering under an argon atmosphere, and t...

Embodiment 1

[0057] The present embodiment provides a method for preparing a graphene reinforced alloy steel, and the graphene / 20CrMnTi composite material is prepared by using the method, and the specific details are as follows:

[0058] S1: Using a household microwave oven with a power of 900W to microwave expandable graphite (80 mesh, 99.9% purity) for 30 seconds to prepare expanded graphite.

[0059] S2: Weigh 49.85 grams of 20CrMnTi metal powder and 0.15 grams of expanded graphite (the corresponding mass fraction is 0.3%). The above-mentioned expanded graphite was placed in 500 ml of anhydrous ethanol solution for ultrasonic peeling for 40 min, and mechanical stirring was assisted to form a graphene suspension.

[0060] S3: The pH value of the above-mentioned graphene suspension is 4~5, and it is subjected to acid washing and alkali washing treatment to adjust the pH. The acid washing reagent is dilute nitric acid with a concentration of 5 wt.%, and the alkali washing reagent is ammon...

Embodiment 2

[0066] The present embodiment provides a method for preparing a graphene reinforced alloy steel, and the graphene / 20CrMnTi composite material is prepared by using the method, and the specific details are as follows:

[0067] S1: Using a household microwave oven with a power of 900W to microwave expandable graphite (80 mesh, 99.9% purity) for 30 seconds to prepare expanded graphite.

[0068] S2: Weigh 49.75 g of 20CrMnTi metal powder and 0.25 g of expanded graphite (the corresponding mass fraction is 0.5%). The above-mentioned expanded graphite was placed in 500 ml of anhydrous ethanol solution for ultrasonic peeling for 40 min, and mechanical stirring was assisted to form a graphene suspension.

[0069] S3: The pH value of the above-mentioned graphene suspension is 4~5, and it is subjected to acid washing and alkali washing treatment to adjust the pH. The acid washing reagent is dilute nitric acid with a concentration of 5 wt.%, and the alkali washing reagent is ammonia water...

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Abstract

The invention relates to a preparation method of graphene reinforced 20CrMnTi alloy steel, belongs to the technical field of metal matrix composite materials, and solves the problems of high preparation cost of graphene and easy agglomeration of graphene in a metal matrix in the prior art. The method for preparing graphene / 20CrMnTi composite material: using cheap expandable graphite and 20CrMnTi powder as raw materials, heating expandable graphite to obtain worm-like expanded graphite; ultrasonically exfoliating in absolute ethanol to obtain graphene suspension, neutralized by acid and alkali Process and centrifugally clean for many times; the centrifuged product is dried and then milled with 20CrMnTi powder to obtain a mixed powder; the graphene / 20CrMnTi dense block material is prepared by a two-step hot pressing sintering method. The graphene of the invention has low preparation cost, simple process, and the graphene is uniformly dispersed in the matrix, can be applied to various steel-based composite materials, and has great significance for promoting the industrial application of the graphene-based steel-based composite material.

Description

technical field [0001] The invention relates to the technical field of metal matrix composite materials, in particular to a graphene-reinforced 20CrMnTi alloy steel and a preparation method thereof. Background technique [0002] Graphene, a two-dimensional nanomaterial formed by periodic arrangement of carbon atoms in a hexagonal shape, is the basic structural unit of carbon materials in other dimensions. Due to its extremely high mechanical properties, excellent electrical and thermal conductivity, and unique single-atom layer structural characteristics, it is considered as an ideal reinforcement phase, and is often used to improve the properties of composite materials. [0003] At present, the research on graphene-reinforced metal matrix composites mainly focuses on graphene-reinforced aluminum-based, copper-based, magnesium-based and other metal materials with low density, while the research on graphene-reinforced alloy steel is still in its infancy. SUMMARY OF THE INVE...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/02B22F9/04B22F3/14
CPCC22C33/0207B22F9/04B22F3/14
Inventor 陆晓刚李永胜潘鹏陈蕴博左玲立胡树郡张宝燕王浩琦陈茹
Owner BEIJING NAT INNOVATION INST OF LIGHTWEIGHT LTD
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