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A kind of titanium alloy composite coating for engine blade and preparation method thereof

A technology for engine blades and composite coatings, applied in metal material coating processes, coatings, heating inorganic powder coatings, etc. The effect of controllable thickness and wide application prospects

Active Publication Date: 2022-03-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention aims to solve the problem that the bonding strength between the coating and the substrate is weak, and it is easy to fall off when subjected to external impact, and provides a coating with high bonding strength with the substrate, which is not easy to fall off when subjected to strong external impact

Method used

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  • A kind of titanium alloy composite coating for engine blade and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, the base material is selected as carbon fiber reinforced polyetheretherketone with a thickness of about 20mm×20mm×2mm, and a tin coating with a thickness of 100-200 μm and a titanium alloy coating with a thickness of 400-800 μm are successively deposited on the surface of the base. The specific preparation process is as follows:

[0034] 1. Screen the metal powder raw material with a 350-mesh filter sieve to ensure that the particle size is uniform and meet the requirements for cold spraying. After drying at 120°C for 1 hour, a dry powder that can be sprayed is obtained.

[0035] 2. The carbon fiber reinforced composite matrix is ​​ultrasonically cleaned in acetone for 5 to 10 minutes, and then dried to obtain a matrix with a clean surface.

[0036] 3. Spray tin powder on the surface of the substrate in advance to prepare the bonding layer. The spraying method is cold spraying. The specific process parameters are: the spraying gas is nitrogen, the main ...

Embodiment 2

[0040] In this example, the base material is carbon fiber reinforced epoxy resin with a thickness of about 20mm×20mm×2mm, and an aluminum coating with a thickness of 100-200 μm and a titanium alloy coating with a thickness of 400-800 μm are successively deposited on the surface of the base. The preparation process is as follows:

[0041] 1. Screen the metal powder raw material with a 300-mesh filter sieve to ensure that the particle size is uniform to meet the requirements of cold spraying, and dry it at 120°C for 1 hour to obtain a dry powder that can be sprayed.

[0042] 2. Place the carbon fiber reinforced epoxy substrate in acetone for ultrasonic cleaning for 5-10 minutes, and dry it to obtain a substrate with a clean surface.

[0043] 3. Spray aluminum powder on the surface of the coating in advance to prepare the bonding layer. The spraying method is cold spraying. The specific process parameters are: the spraying gas is nitrogen, the main gas pressure of cold spraying i...

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Abstract

The invention relates to the technical field of functional coatings, and discloses a titanium alloy composite coating for engine blades and a preparation method thereof. The coating sequentially includes an adhesive layer and a titanium alloy layer on the surface of a substrate, and is stretched and bonded with the substrate. The strength is 25-30MPa; it is formed by spraying aluminum powder, tin powder or zinc powder; the titanium alloy layer is formed by spraying titanium powder. The preparation method of the titanium alloy composite coating comprises the steps of: (1) cleaning the substrate; (2) preparing an adhesive layer on the surface of the substrate by using a cold spraying process; (3) preparing a titanium alloy layer by spraying on the adhesive layer by using a cold spraying process. The invention utilizes the "cold" characteristic of cold spraying, and the particles hitting the surface of the substrate will not ablate the substrate with a low melting point due to high temperature, thereby destroying the deposition quality of the coating. The coating preparation method of the present invention is energy-saving, environmentally friendly, Stable and reliable and suitable for industrialization and other advantages, it has a wide application prospect in the field of aerospace engineering.

Description

technical field [0001] The invention relates to the technical field of functional coatings, in particular to a titanium alloy composite coating for engine blades and a preparation method thereof. Background technique [0002] Lightweight is the focus of aircraft structure design. Only by controlling the structural quality factor below 30% can there be room for fuel and payload, which not only reduces the flight cost, but also improves the endurance and service life of the aircraft. At present, the amount of composite materials used in the Boeing 787 "Dreamliner" has reached half of the aircraft's structural quality, saving more than 20% of fuel; The use ratio of body composite materials has also exceeded 50%, and it is mainly carbon fiber reinforced polyether ether ketone. Carbon fiber reinforced composite materials have the characteristics of high specific strength and specific stiffness, light weight, small thermal expansion coefficient, strong fatigue resistance and dam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08
CPCC23C24/087C23C24/085
Inventor 所新坤黄群周平秦加浩凤晓华刘奕李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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