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A kind of preparation method of high temperature protective coating

A protective coating and high temperature technology, applied in coating, metal material coating process, vacuum evaporation plating, etc., can solve the problems of increasing the surface roughness of the coating, consuming the Al content of the coating, etc., and achieve the removal of surface roughness , optimize the distribution of coating elements, and improve the effect of high temperature service performance

Active Publication Date: 2020-06-26
苏州金航纳米技术研究有限公司
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Problems solved by technology

However, the above method not only increases the surface roughness of the coating during pulsed electron beam remelting, but also forms a large amount of Al during the preparation of APS 2 o 3 , which consumes the Al content inside the coating to a certain extent, so the improvement of high temperature oxidation resistance and hot corrosion resistance is limited

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  • A kind of preparation method of high temperature protective coating
  • A kind of preparation method of high temperature protective coating
  • A kind of preparation method of high temperature protective coating

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Embodiment Construction

[0024] The following is an example of the coating prepared by the composite technology of arc ion plating and pulsed electron beam, and the specific preparation method of the composite technology is described in detail in conjunction with the accompanying drawings.

[0025] S1. After the superalloy substrate is pre-grinded, cleaned, and sandblasted, use arc ion plating technology to deposit NiCoCrAlYX (X=Hf+Si, Co 20%, Cr 28%, Al 10%, Y0 .8%, Si0.08%, Hf0.15%, Ni Bal.) high-temperature protective coating, the thickness is 30μm; choose according to the technical requirements of arc ion plating equipment: vacuum -3 Pa, arc current 60A, arc voltage 20V, pulse bias -300V;

[0026] S2. Carry out vacuum heat treatment (900°C, 4h) to the prepared NiCoCrAlYX coating, and the vacuum degree of the vacuum heat treatment furnace is 1×10 -3 Pa, the heating rate is controlled at 5°C·min -1 ;

[0027] S3. Perform HCPEB bombardment treatment on the NiCoCrAlYX coating after vacuum heat treat...

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Abstract

The invention relates to the technical field of coatings, in particular to a preparation method of a high-temperature protective coating with a novel surface structure. By the adoption of the technology combining arc ion plating (AIP) and high current pulsed electron beam (HCPEB), the surface of the high-temperature protective coating prepared through the method is of the smooth and dense mirror structure, the phase structure is simplex and is only composed of a gamma / gamma' phase, the content of an Al element and rare earth elements on the surface layer is greatly improved, and distribution is quite uniform. In addition, a large number of ultra-fine grain structures are further evenly distributed on the surface, and the high temperature oxidation resistance and hot corrosion resistance ofthe coating can be substantially improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a method for preparing a high-temperature protective coating, and is particularly suitable for the preparation of a high-temperature protective coating on a high-temperature oxidation-resistant and thermal-corrosion-resistant superalloy surface. Background technique [0002] In the fields of modern energy and aviation and aerospace industries, in order to improve the performance index of the power system, higher and higher requirements are put forward for the performance of superalloys and their protective coating materials; in practical applications, superalloys mainly bear loads role, while the protective coating plays a role in resisting high temperature oxidation. High temperature protective coating has excellent resistance to high temperature oxidation and thermal corrosion, and its coating composition can be selected according to different working conditions. It can be use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/32C23C14/02C23C14/16C23C14/58
CPCC23C14/021C23C14/16C23C14/325C23C14/5806C23C14/584
Inventor 蔡杰李国君高承钻李晨吕鹏关庆丰鲁金忠
Owner 苏州金航纳米技术研究有限公司
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