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Method for preparing aluminum-based amorphous layer by jointly adopting hot spraying and electron beam remelting technologies

An amorphous layer, thermal spraying technology, applied in the direction of coating, metal material coating process, melt spraying, etc., can solve the problems of limiting the corrosion resistance of the coating, unable to prepare the coating, etc., to achieve short processing time, eliminate the Defect structure, the effect of strong amorphous forming ability

Active Publication Date: 2019-10-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0005] The above-mentioned prior art all discloses thermal spraying technology, however, no matter what kind of thermal spraying technology adopts at present, all comprises a certain amount of crystal phase, oxide phase, typical lamellar and pore structure in the coating, this greatly limits Corrosion resistance of the coating
In addition, due to the limitation of the cooling rate of the coating material in the thermal spraying process and the microstructure of the thermal sprayed coating itself, the thermal spraying technology cannot prepare a coating with a completely amorphous composition.

Method used

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  • Method for preparing aluminum-based amorphous layer by jointly adopting hot spraying and electron beam remelting technologies
  • Method for preparing aluminum-based amorphous layer by jointly adopting hot spraying and electron beam remelting technologies
  • Method for preparing aluminum-based amorphous layer by jointly adopting hot spraying and electron beam remelting technologies

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Embodiment 1

[0032] The HOPE-I high-current pulsed electron beam device was used to remelt the thermal sprayed AlCoCe coating to prepare the amorphous alloy treatment layer. The testing process is as follows:

[0033] (1) Prepare Al by vacuum induction melting furnace 86 co 7.6 Ce 6.4 Alloy, and use gas atomization technology to prepare alloy powder in vacuum metal atomization powder making furnace, vacuum degree ≤ 1.0×10 -3 Pa, the melting temperature is 1350°C, the atomizing gas is argon, and the pressure is 4MPa;

[0034] (2) Use acetone and absolute ethanol to clean the surface of the Q235 steel substrate to remove oil stains; then remove the attachments and oxide scales on the surface of the Q235 steel substrate by sandblasting, and the surface derusting level reaches Sa 2.5. After the end, dry the surface with dry gas blow off;

[0035] (3) Using supersonic flame thermal spraying equipment to deposit alloy powder on the surface of Q235 steel substrate to form Al 86 co 7.6 Ce ...

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Abstract

The invention discloses a method for preparing an aluminum-based amorphous layer by jointly adopting hot spraying and electron beam remelting technologies, and relates to the technical field of preparation of an aluminum-based amorphous coating. The method comprises the steps of preparing an Al-Co-Ce alloy, carrying out a gas atomization process on the alloy so as to powder, then utilizing a supersonic speed flame for hot-spraying a substrate surface so as to prepare an Al-Co-Ce alloy protection coating, and finally adopting a high-current pulse electron-beam for carrying out surface modification on the prepared Al-Co-Ce alloy protection coating, wherein the Al-Co-Ce alloy is prepared from 4.0 to 8.0 at percent of Co, 6.0 to 8.0 at percent of Ce and the balance Al. According to the methodfor preparing the aluminum-based amorphous layer by jointly adopting the hot spraying and electron beam remelting technologies provided by the invention, surface modification is carried out on the surface of a hot-spraying coating, so that the amorphous alloy layer with a flat surface and a compact structure is generated, and the corrosion resistance of the hot-spraying coating is improved.

Description

technical field [0001] The invention relates to the technical field of preparation of aluminum-based amorphous coatings, in particular to a method for preparing aluminum-based amorphous layers using thermal spraying and electron beam remelting composite technology, and is especially suitable for coating protection of metal substrates in marine and other environments . Background technique [0002] Amorphous alloys have been proven to have better corrosion resistance than crystalline phase materials with the same composition. Among them, aluminum-based amorphous alloys have attracted the attention of a large number of researchers due to their low price, high specific strength, and good plasticity. A large number of studies have shown that the amorphous alloy coating prepared by thermal spraying technology has better corrosion protection performance than the traditional aluminum clad layer, and this technology can also be applied to on-site repair. [0003] For example, the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/129C23C4/08C23C4/18C22C21/00B22F9/08
CPCB22F9/082C22C21/00C23C4/08C23C4/18C23C4/129
Inventor 李春玲王洪博孙霜青胡松青王秀民王志坤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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