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Method for improving anti-stripping performance of high-temperature alloy oxidation film

A high-temperature alloy, oxide film technology, applied in anodizing, metal material coating process, coating and other directions, can solve the problem of unhindered oxide film crystals such as coarse columnar crystals, etc., to improve anti-stripping performance, wide adaptability, delay The effect of peeling time

Pending Publication Date: 2022-07-29
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the present invention still has the following problems: the invention directly anodizes the raw material (TiAl alloy) to obtain a protective oxide film, and this technology is only effective for alloys with high Al content; in addition, the invention is prepared on the surface of the metal substrate The protective oxide film can improve the oxidation resistance, but it cannot hinder the epitaxial growth of oxide film crystals to form coarse columnar crystals.

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  • Method for improving anti-stripping performance of high-temperature alloy oxidation film

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Embodiment Construction

[0021] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0022] An embodiment of the present invention provides a method for improving the peeling resistance of an oxide film of a superalloy. The method includes: forming a metal film on the surface of the superalloy after service; performing oxidation treatment on the metal film, and forming a porous oxide on the surface of the superalloy after service membrane, the structure of the porous oxide film is as figure 1 It can be seen that the porous oxide film formed on the surface of the superalloy ...

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Abstract

The invention provides a method for improving the anti-stripping performance of a high-temperature alloy oxidation film. The method comprises the steps that a metal film is formed on the surface of a served high-temperature alloy; and the metal film is subjected to oxidation treatment, and a porous oxidation film is formed on the surface of the serving high-temperature alloy. The method has the characteristics of low cost and wide adaptability, and can block the epitaxial growth of thick columnar oxide grains and reform fine oxide grains on the surface of the oxide film, so that the method adapts to the stress in the oxide film, delays the stripping time of the oxide film and improves the anti-stripping performance of the oxide film.

Description

technical field [0001] The present invention relates to the technical field of superalloys, in particular to a method for improving the anti-peeling performance of oxide films of superalloys. Background technique [0002] During the service process of the superalloy, metal atoms continue to diffuse and react with oxygen to form oxide particles. Oxide grains tend to form columnar grains in the form of epitaxial growth, and the columnar grains gradually become coarser with the prolongation of oxidation time. At the same time, the stress in the oxide film gradually accumulates and increases with the growth of the oxide film, and the coarse columnar crystals will be difficult to adapt to the stress, which will cause the oxide film composed of columnar crystals to be broken and peeled off under the action of high stress, and loss of protection. [0003] After searching, it is found that the Chinese invention patent application publication number CN106086981A discloses a preparat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D11/08C25D11/10C25D11/26C25D11/30C23C2/12C23C2/26
CPCC25D11/04C25D11/08C25D11/10C25D11/26C25D11/30C25D11/026C23C2/12C23C2/26
Inventor 董安平何林杜大帆熊良华孙宝德
Owner SHANGHAI JIAO TONG UNIV
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