Anti-oxidation MCrAlY fine-grain protective coating material and preparation method thereof

A protective coating and anti-oxidation technology, which is applied in coating, metal material coating process, fusion spraying, etc., can solve the problem of affecting the formation and growth of oxide film, restricting the wide application of coating technology, and the coating is easy to crack or Problems such as shedding

Inactive Publication Date: 2014-05-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] MCrAlY (M is a transition metal Ni, Co, or a mixture of Ni and Co) coating is widely used in the production of gas turbine blades with high operating parameters and harsh environments due to its excellent resistance to high temperature oxidation and hot corrosion resistance Anti-oxidation protective coating and thermal barrier coating bonding layer on the coating; there are many coating preparation processes, including electron beam physical vapor deposition (EB-PVD), plasma spraying (PS), detonation spraying (DS) and high-speed Oxygen flame spraying (HVOF), etc.; Among them, plasma spraying technology has become the main preparation method of MCrAIY protective coating due to its low cost, high production efficiency, wide adjustable range of spraying thickness, and easy control of composition; but the coating prepared by plasma spraying There are more porosity and hol

Method used

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  • Anti-oxidation MCrAlY fine-grain protective coating material and preparation method thereof
  • Anti-oxidation MCrAlY fine-grain protective coating material and preparation method thereof
  • Anti-oxidation MCrAlY fine-grain protective coating material and preparation method thereof

Examples

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Embodiment 1

[0024] Example 1: In conjunction with the specific experimental process, describe in detail the implementation of the high-temperature oxidation resistance of CoCrAlY fine-grained protective coatings. Taking the same energy and different pulse times as examples, the specific steps are as follows:

[0025] (1) Preparation of CoCrAlY fine-grain protective coating

[0026] S1. The high-temperature alloy substrate, such as engine blades and other components, after pre-grinding, cleaning, and sandblasting roughening treatment, deposits a Co23Cr13Al0.5Y protective coating on the surface of the superalloy substrate by atmospheric plasma spraying, with a thickness of 200 μm; according to The technical requirements of the atmospheric plasma spraying equipment choose a voltage of 38 V, a current of 750 A, a spray gun speed of 450 mm / s, and a spraying distance of 85 mm.

[0027] S2. Fix the prepared Co23Cr13Al0.5Y protective coating on the sample stage of the high-current pulsed electron...

Embodiment 2

[0034] Example 2: In conjunction with the specific experimental process, describe in detail the implementation of the high-temperature oxidation resistance of the Co23Cr13Al0.5Y fine-grained protective coating. Taking the same number of pulses and different energies as an example, the specific steps are as follows:

[0035] (1) Preparation of Co23Cr13Al0.5Y fine-grain protective coating

[0036] S1. After the superalloy substrate (or parts such as engine blades) has been pre-grinded, cleaned, and sandblasted, a Co23Cr13Al0.5Y protective coating is deposited on the superalloy substrate by atmospheric plasma spraying, with a thickness of 200 μm; according to the atmosphere The technical requirements of the plasma spraying equipment choose a voltage of 38 V, a current of 750 A, a spray gun speed of 450 mm / s, and a spraying distance of 85 mm.

[0037] S2. Fix the prepared Co23Cr13Al0.5Y protective coating on the sample stage of the high-current pulsed electron beam (HCPEB) device,...

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Abstract

The invention relates to the technical field of coatings, and particularly relates to an anti-oxidation MCrAlY fine-grain protective coating material and a preparation method thereof. The anti-oxidation MCrAlY fine-grain protective coating material comprises a high-temperature alloy matrix, an MCrAlY protective coating, and a super-fine grain remelting layer. The invention further discloses a preparation method of the anti-oxidant MCrAlY fine-grain protective coating material, namely, an MCrAlY protective coating with a super-fine grain structure is prepared by adopting an air plasma spraying (APS) and high current pulsed electron beam (HCPEB) compounding technology. The MCrAlY protective coating with the super-fine grain structure, prepared by adopting the compounding technology, is capable of accelerating selective oxidation of an Al element, and promoting the coating to rapidly form a continuous and compact oxidation film within a short time, thereby reducing the consumption of an oxidation film generating element in the oxidation process, and further improving the anti-oxidation capacity of the coating.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an oxidation-resistant MCrAlY fine-grain protective coating material and a preparation method thereof. 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 Therefore, it is particularly urgent to measure the high temperature oxidation resistance of protective coating materials, study its oxidation and failure mechanism, and find ways to improve the high temperature oxidation performance. [0003] MCrAlY (M is a transition metal Ni, Co, or a mixture of Ni and Co) coating is widely used in the production of gas turbine blades with high operating parameters and harsh environments due to its excelle...

Claims

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Application Information

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IPC IPC(8): C23C4/08C23C4/12C23C4/18C23C4/073C23C4/134
Inventor 关庆丰蔡杰杨盛志侯秀丽王晓彤李艳
Owner JIANGSU UNIV
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