Preparing method of graphene steel composite

A composite material and graphene technology, applied in the field of steel-based composite materials, can solve problems that need to be improved, and achieve the effects of avoiding excessive grain growth, eliminating component segregation, and simplifying process steps

Active Publication Date: 2019-05-03
北京石墨烯技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mechanical properties of graphene-steel composites prepared by the current process still need to be improved.

Method used

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  • Preparing method of graphene steel composite

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preparation example Construction

[0026] The embodiment of the present invention provides a kind of preparation method of graphene steel composite material, comprising:

[0027] S10, providing a mixed solution, the mixed solution including an organic solvent, graphene powder and steel powder;

[0028] S20, drying the mixed liquid to obtain a mixed powder;

[0029] S30, loading the mixed powder after the drying treatment in a bag for vacuum degassing and sealing the bag;

[0030] S40, subjecting the sealing envelope loaded with the mixed powder to hot isostatic pressing, the temperature of the hot isostatic pressing is 920° C. to 1300° C., so that the mixed powder forms a composite material green body; and

[0031] S50, separating the composite material green body from the wrapping.

[0032] In the embodiment of the present invention, a graphene-steel composite material is prepared by mechanically mixing graphene powder and steel powder, vacuum pumping and hot isostatic pressing. Compared with steel without ...

Embodiment 1

[0066] Provide powder with the following quality: in the total weight of graphene powder and steel powder, 0.3% graphene powder, 1% non-graphite carbon, 17% Cr, 0.4% Mo, no more than 0.7 % of Mn, 0.2-0.45% of Si, not more than 0.23% of Cu, not more than 0.3% of Ni, not more than 0.035% of P, not more than 0.03% of S, and the balance is iron. The particle size of the steel powder was 50 μm.

[0067] Put the graphene powder and steel powder into a V-type powder mixer for 3 hours, add absolute ethanol to form a mixed solution, dry it under mechanical stirring at 25°C until the mixed solution is semi-dry, and then transfer it to a vacuum oven. Carry out thorough drying in a dry box at a drying temperature of 90°C to obtain a mixed powder;

[0068] Low-temperature ball milling is carried out on the mixed powder after the drying treatment, the temperature of the low-temperature ball mill is -80°C, and the ball milling time is 0.5h to 4h;

[0069] The mixed powder from ball milling...

Embodiment 2

[0073] This embodiment is basically the same as that of Embodiment 1, except that the temperature of the hot isostatic pressing is 980°C.

[0074] The mechanical properties of the prepared graphene-steel composite were measured, and the results are shown in Table 1 below.

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Abstract

The invention discloses a preparing method of a graphene steel composite. The preparing method comprises the steps that mixed liquor is provided and comprises an organic solvent, graphene powder and steel powder; the mixed liquor is subjected to drying treatment to obtain mixed powder; the dried mixed powder is loaded in a sheath to be subjected to vacuum pumping degassing treatment, and the sheath is sealed; the sealed sheath loaded with the mixed powder is subjected to hot isostatic pressure treatment, the temperature of the hot isostatic pressure ranges from 920 to 1300 DEG C, and the mixedpowder forms a composite green body; and the composite green body and the sheath are separated.

Description

technical field [0001] The invention relates to the field of steel-based composite materials, in particular to a preparation method of graphene-steel composite materials. Background technique [0002] Steel is the most basic material in the manufacturing industry. The modern equipment manufacturing industry has higher and higher requirements for steel. It must have high hardness, wear resistance, contact fatigue strength, elastic limit, good impact toughness, fracture toughness, and dimensional stability. wait. Due to the limitations of traditional technology and equipment, conventionally manufactured steel is always limited by insufficient strength, insufficient toughness, and easy wear, and its service life and performance still cannot meet the processing needs of existing high-performance parts. [0003] Graphene is the nanomaterial with the highest specific strength and the hardest known in the world, and it has high toughness due to its two-dimensional structure. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/02C22C38/44C22C38/42C22C38/02C22C38/04B22F3/15
Inventor 曹振李炯利郭建强李文博王旭东
Owner 北京石墨烯技术研究院有限公司
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