Cobalt-based spray powder used for aero-engine abrasion-resistant parts and preparation method thereof

An aero-engine and powder-spraying technology, applied in the field of wear-resistant coating materials, can solve the problems of poor grinding and polishing performance, weak adhesion of ultra-fine powder coatings, prone to cracks and delamination, and achieve excellent resistance to Abrasive wear, good coating grinding and polishing performance, surface smoothing effect

Inactive Publication Date: 2017-07-25
TIANJIN CHENGLI AVIATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing ultra-fine powder coatings for plasma spraying have defects such as weak adhesion, easy cracks and delamination, poor grinding and polishing performance, so it is necessary to develop and design a new one suitable for aero-engine wear-resistant parts spray powder

Method used

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  • Cobalt-based spray powder used for aero-engine abrasion-resistant parts and preparation method thereof
  • Cobalt-based spray powder used for aero-engine abrasion-resistant parts and preparation method thereof
  • Cobalt-based spray powder used for aero-engine abrasion-resistant parts and preparation method thereof

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Embodiment Construction

[0025] In order to further understand the content of the invention, characteristics and effects of the present invention, the following examples are described in detail as follows:

[0026] In the present embodiment, the composition and weight percentage of the spray powder are respectively:

[0027] Chromium: 25.5%

[0028] Nickel: 10.5%

[0029] Tungsten: 7.5%

[0030] Carbon: 0.5%

[0031] Cobalt: 56%.

[0032] The particle size range of spray powder is 5μm~45μm.

[0033] The preparation method of the above-mentioned spraying powder comprises the following steps: a, batching: batching the components of chromium, nickel, tungsten, carbon, and cobalt according to the weight ratio, and fully mixing the components; b, smelting: mixing the above The raw materials are heated and melted in the crucible, and the melting temperature is 1280 ° C ~ 1320 ° C. The molten alloy liquid flows out from the guide tube at the bottom of the crucible and enters the atomization chamber; c. ...

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Abstract

The invention belongs to the technical field of wear-resistant coating materials, and in particular relates to a cobalt-based spraying powder for aero-engine wear-resistant parts, and also relates to a method for preparing the above-mentioned spraying powder. The composition and weight percentage of the spray powder are: chromium: 20%~30%; nickel: 7%~15%; tungsten: 5%~12%; carbon: 0.1%~1%; cobalt: 45%~65% %; the particle size range of the above spray powder is 5 μm to 45 μm; the coating obtained by using the spray powder is suitable for working at high temperature, and has excellent anti-abrasive wear, hard surface wear, fretting wear and particle erosion wear performance ;After spraying, the bonding strength is high, and it is not easy to fall off; after spraying, the coating has a uniform texture, smooth surface, no delamination and cracks; at the same time, the cobalt content in the material determines that the coating is an excellent anti-oxidation coating; in addition , the powder coating also has good coating grinding and polishing properties and high coating hardness, and can be widely used in the application of engine parts.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant coating materials, and in particular relates to a cobalt-based spraying powder for aero-engine wear-resistant parts, and also relates to a method for preparing the above-mentioned spraying powder. Background technique [0002] Due to high temperature, corrosion, friction and wear on the surface of some parts of the aero-engine turbine and the combustion chamber, the mechanical parts will be worn out and the service life of the parts will be shortened. Therefore, it is necessary to improve the wear resistance, oxidation resistance and corrosion resistance of aero-engine parts to adapt to their long-term work in harsh environments such as high temperature and high load, to solve the problems of wear and corrosion of metal parts, and to extend the life of metal parts. service life. [0003] In the 1960s and 1970s in my country, a simple process of using a welding torch as a tool to coat molte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C22C30/00C22C19/07C23C4/06C23C4/134
CPCB22F1/0003C22C19/07C22C30/00C23C4/06
Inventor 郑鑫郑惠金任金茹王鹏王德伟但盼亮
Owner TIANJIN CHENGLI AVIATION TECH CO LTD
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