Ceramic slurry for aluminizing protection and preparation method and application of ceramic slurry

A ceramic slurry and aluminizing technology, which is applied in transportation and packaging, metal processing equipment, metal material coating technology, etc., can solve the problems of high toxicity, cumbersome operation, and increased cost

Pending Publication Date: 2021-05-28
成都航宇超合金技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The protective coating uses lacquer as a binder, which makes the operation cumbersome, long drying time, high toxicity, and the volume component of lacquer in the ingredients accounts for a large proportion. It can be cleaned after sintering, but it will cause serious oxidation on the surface of the substrate, such as parts. The surface is yellow and black
And the turbine blade parts made by the aluminized protective ceramic slurry will increase the process, such as polishing, which will reduce the production efficiency and increase the cost

Method used

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  • Ceramic slurry for aluminizing protection and preparation method and application of ceramic slurry
  • Ceramic slurry for aluminizing protection and preparation method and application of ceramic slurry
  • Ceramic slurry for aluminizing protection and preparation method and application of ceramic slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Slurry configuration

[0043] The mass ratio of zirconia, binder and metal is 2.5:1:1. The binder is prepared by dissolving 3g of polyvinyl acetate in 20mL of acetone, and the metal is pure nickel powder with a purity ≥ 99.2% and a particle size ≤ 150 μm. The preparation method of the above-mentioned ceramic slurry for aluminizing protection is as follows: firstly mix zirconia powder and binder in a mass ratio of 2.5:1, then add metallic nickel powder and stir evenly to obtain the ceramic slurry for aluminizing protection.

[0044] (2) Slurry coating

[0045] The prepared ceramic slurry for aluminizing protection is directly coated on the tenon of the turbine blade, and a total of 3 layers are coated. The specific steps of coating are: coating the first layer and then drying, and then coating the second layer; After one layer dries, the next layer can be applied. In order to prevent delamination of ceramic slurry for aluminizing protection, constant stirring is r...

Embodiment 2

[0050] (1) Slurry configuration

[0051] The mass ratio of zirconia, binder and metal powder is 2.5:1:1. The binder is prepared by dissolving 3g of polyvinyl acetate in 20mL of acetone, and the metal is pure chromium powder with a purity ≥ 99.5% and a particle size ≤ 150 μm. The preparation method of the above-mentioned ceramic slurry for aluminizing protection is as follows: firstly mix zirconia powder and binder at a mass ratio of 2.5:1, then add metal chromium powder and stir evenly to obtain the ceramic slurry for aluminizing protection.

[0052] (2) Slurry coating

[0053] The prepared ceramic slurry for aluminizing protection is directly coated on the tenon of the turbine blade, and a total of 5 layers are coated. The specific steps of coating are: coating the first layer and then drying, and then coating the second layer; After one layer dries, the next layer can be applied. In order to prevent delamination of the ceramic slurry for aluminizing protection, the coatin...

Embodiment 3

[0058] (1) Slurry configuration:

[0059] The mass ratio of zirconia, binder and metal powder is 2.5:1:1. The binder is prepared by dissolving 3 g of polyvinyl acetate in 20 mL of acetone, and the metal is pure Fe powder with a purity ≥ 99.8% and a particle size ≤ 150 μm. The preparation method of the above-mentioned ceramic slurry for aluminizing protection is as follows: firstly mix zirconia powder and binder at a mass ratio of 2.5:1, then add metallic iron powder and stir evenly to obtain the ceramic slurry for aluminizing protection.

[0060] (2) Slurry coating:

[0061] The prepared ceramic slurry for aluminizing protection is directly coated on the tenon of the turbine blade, and a total of 7 layers are coated. The specific steps of coating are: coating the first layer and then drying, and then coating the second layer; After one layer dries, the next layer can be applied. In order to prevent delamination of the ceramic slurry for aluminizing protection, the coating n...

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Abstract

The invention belongs to the field of chemical heat treatment, and particularly relates to ceramic slurry for aluminizing protection and a preparation method and application of the ceramic slurry. According to the ceramic slurry for aluminizing protection and the preparation method and application of the ceramic slurry, the ceramic slurry for aluminizing protection forms a stable and non-falling aluminizing protective layer after being sintered, has a good shielding effect, and does not react with a matrix. The ceramic slurry for aluminizing protection comprises the following components of zirconium oxide, a binder and metal, wherein the mass ratio of the zirconium oxide to the binder to the metal is (0.8-3): (0.5-1.5): (0.8-1.5). According to the ceramic slurry for aluminizing protection, zirconium oxide powder, the binder and metal powder are mixed and then coat a tenon of a turbine blade, and the ceramic slurry is used for protection during aluminizing of solid powder at the aluminizing temperature of 600-1,100 DEG C.

Description

technical field [0001] The invention belongs to the field of chemical heat treatment, and in particular relates to a ceramic slurry for aluminizing protection and a preparation method and application thereof. Background technique [0002] With the development of the modern aviation industry, the temperature requirements for the turbine blades of aeroengines are also getting higher and higher. In order to meet the requirements of high temperature, high speed, high pressure, long life and high stability, aero-engine turbine blades are widely treated with aluminizing. After the surface of the aluminized part is oxidized by high-temperature air circulation, a uniform and dense Al is formed. 2 o 3 The oxide film can effectively prevent oxygen from diffusing to the blade substrate and prevent further oxidation failure of the blade. [0003] Solid powder aluminizing is a method of covering parts in powdered aluminizing agent and heating and diffusing to form an aluminized layer ...

Claims

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Application Information

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IPC IPC(8): C23C26/00B22F1/00
CPCC23C26/00B22F1/107
Inventor 韩帮强张星宇张国云亢杰
Owner 成都航宇超合金技术有限公司
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