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Method for repairing worn part by utilizing spraying of two coatings

A technology for parts and coatings, applied in the field of repairing worn parts by spraying two-layer coatings, can solve the problems of high combustion flow temperature, large thermal influence on the structure and properties of the matrix alloy, poor arc spraying bonding force, etc. The effect of low flow temperature, good coating bond strength and extended service life

Inactive Publication Date: 2018-06-29
新锐咨询(辽宁)有限公司
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AI Technical Summary

Problems solved by technology

[0002] Bearing parts wear is a common problem. The commonly used thermal spraying coating methods (plasma, supersonic spraying, arc) can be used to repair the size of alloy worn parts. The thermal influence on performance and performance is large, and the bonding force of arc spraying is poor

Method used

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Embodiment Construction

[0011] A method for repairing worn parts by spraying two-layer coatings, comprising the following steps: first spraying the base layer on the worn parts, detonating spraying WC-25Co cermet coating, the process parameters are: oxygen-fuel ratio 1.5, powder feeding nitrogen flow rate 50, spraying The distance is 205mm, and the thickness of the coating is 0.12mm; then the surface layer is sprayed on the base layer, and the Ni-Cr-Mg alloy coating is sprayed by explosion spraying. , the spraying distance is 200mm, and the thickness of the coating obtained by spraying is in accordance with the design requirements.

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Abstract

The invention relates to a surface treatment method, in particular to a method for repairing a worn part by utilizing the spraying of two coatings. According to the technical scheme, the method for repairing the worn part by utilizing the spraying of the two coatings comprises the following steps: at first, spraying a substrate on the worn part, that is, forming a WC-25Co metal ceramic coating through detonation spraying, wherein the process parameters comprise the oxygen-fuel ratio of 1.5, the powder feeding nitrogen flow rate of 50, the spraying distance of 205 mm and the coating thickness of 0.09-0.12 mm; and then, spraying a surface layer on the substrate, that is, forming a Ni-Cr-Mg alloy coating through detonation spraying, wherein the process parameters comprise the powder particlesize of 25-35 micrometers, the oxygen-fuel ratio of 1.5, the powder feeding nitrogen flow rate of 30 and the spraying distance of 200 mm, and the thickness of the sprayed coating meets the design demand. By adoption of the method for repairing the worn part by utilizing the spraying of the two coatings, the service life of the worn part is prolonged and the repairing cost of the worn part is reduced.

Description

technical field [0001] The invention relates to a surface treatment method, in particular to a method for repairing worn parts by spraying two layers of coatings. Background technique [0002] Bearing parts wear is a common problem. The commonly used thermal spraying coating methods (plasma, supersonic spraying, arc) can be used to repair the size of alloy worn parts. The thermal influence on performance and performance is large, and the bonding force of arc spraying is poor. Contents of the invention [0003] The invention provides a method for repairing worn parts by spraying two layers of coating, which prolongs the service life of the parts and reduces the repair cost of the parts. [0004] Technical scheme of the present invention is as follows: [0005] A method for repairing worn parts by spraying two-layer coatings, comprising the following steps: first spraying the base layer on the worn parts, detonating spraying WC-25Co cermet coating, the process parameters a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/126C23C4/06C23C4/08
CPCC23C4/06C23C4/08
Inventor 曹玉坤
Owner 新锐咨询(辽宁)有限公司
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