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Method for coating asbestos-graphite seal coating on surface of titanium alloy parts

A technology of sealing coating and titanium alloy, which is applied in the direction of surface coating liquid devices, coatings, special surfaces, etc., can solve problems such as low bonding strength and affecting product delivery cycle

Inactive Publication Date: 2017-04-26
HARBIN DONGAN ENGINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the asbestos graphite sealing coating prepared on the surface of the titanium alloy gas sealing ring by this process has a low bonding strength with the titanium alloy surface, and the coating often peels off and needs to be recoated during subsequent machining, which is serious. impact on product lead times

Method used

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  • Method for coating asbestos-graphite seal coating on surface of titanium alloy parts
  • Method for coating asbestos-graphite seal coating on surface of titanium alloy parts
  • Method for coating asbestos-graphite seal coating on surface of titanium alloy parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] The surface of an aero-engine titanium alloy gas seal ring is sealed with hand-coated graphite coating. The drawing requires the coating thickness to be 1.1mm, and the bonding strength of the asbestos-graphite sealing coating is required to be above 1MPa, which is well bonded to the surface of the titanium alloy.

[0052] Implementation process

[0053] (1) Coating formula

[0054]

[0055]

[0056] (2) preparation

[0057] Put the graphite mixture and acicular asbestos into a clean container and mix well; put W61-55 epoxy silicone heat-resistant drying varnish, H61-1 epoxy silicone polyamide heat-resistant paint and xylene into another In a container, stir evenly, then slowly pour into the dry mixture of graphite mixture and acicular asbestos, mix thoroughly with a scraper to make a coating, add xylene during the mixing process to dilute to a suitable consistency, then mechanically stir for 15 minutes and then , in a closed container, park for more than 4 hour...

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Abstract

The invention relates to a method for coating an asbestos graphite seal coating on the surface of a titanium alloy parts. Through the steps of protecting, coating, heating curing and the like, asbestos and graphite are coated on the surface of the titanium alloy parts in a sealing way, wherein a coating material has an anti-high-low temperature cycle performance and favorable heat resistance, and can enable the coating to be more spongy. According to the method for coating the asbestos graphite seal coating on the surface of the titanium alloy parts provided by the invention, the bonding strength of the seal coating can be higher than or equal to 1MPa; and after the coating is coated on the surface of a titanium alloy gas-sealing ring, a disbonding phenomenon is avoided during subsequent processing.

Description

technical field [0001] The invention relates to a coating method of an asbestos graphite sealing coating, in particular to a coating method of an asbestos graphite sealing coating on the surface of a titanium alloy part. Background technique [0002] During the design process of the engine, an abradable sealing coating is used to increase the engine power, reduce energy consumption, simplify the design of the gas path sealing structure and prolong the service life. The abradable sealing coating is mostly prepared by thermal spraying, but due to the structure and working conditions of individual parts, thermal spraying technology cannot be used to prepare sealing coating, and sealing coating can only be prepared by manual coating method. In the past, the manual coating of asbestos graphite sealing layer on the surface of titanium alloy parts was prepared as follows: [0003] (1) Coating formula [0004] Bottom recipe: [0005] 2 grams of artificial graphite of 80 mesh to 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D7/14B05D7/16B05D7/24B05D3/02B05D3/10C09D183/04C09D177/00C09D7/12
CPCB05D3/0272B05D3/102B05D5/00B05D7/14B05D7/16B05D7/24B05D2202/35B05D2501/00B05D2504/00B05D2518/12B05D2601/20C08L2201/08C09D5/18C09D183/04C09D7/61C09D7/70B05D2401/10C08L77/00C08K7/12C08K7/00C08K3/04
Inventor 宋丙红王忠明周锴师玉英杨旭
Owner HARBIN DONGAN ENGINE GRP
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