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Bilayer-structure bonding coating on surface of single crystal alloy and preparation method of bilayer-structure bonding coating

A double-layer structure and bonding layer technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the complex composition and performance regulation of bonding layer, high cost, and the influence of the interface bonding performance of the barrier diffusion layer. and other problems, to achieve good high temperature oxidation resistance, low cost, and improve the effect of high temperature oxidation resistance

Active Publication Date: 2016-09-21
CHINESE ACAD OF AGRI MECHANIZATION SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common characteristics of the above methods are high cost, complex control of the composition and performance of the bonding layer, or the influence of the diffusion barrier layer on the interface bonding performance

Method used

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  • Bilayer-structure bonding coating on surface of single crystal alloy and preparation method of bilayer-structure bonding coating
  • Bilayer-structure bonding coating on surface of single crystal alloy and preparation method of bilayer-structure bonding coating
  • Bilayer-structure bonding coating on surface of single crystal alloy and preparation method of bilayer-structure bonding coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Example 1: Preparation of double-layer structure bonding layer on the surface of DD6 single crystal alloy

[0072] Step 1: Prepare the DD6 single crystal alloy matrix material, clean it with anhydrous acetone, use a suction sandblasting machine at 0.1Mpa sandblasting gas pressure to perform sandblasting on the sprayed surface, and then use compressed air to blow away the surface residue The sand particles are cleaned again with anhydrous acetone, the substrate is installed on the tooling, and it is to be sprayed.

[0073] Step 2: Put the dried Ni26Cr4Al0.4Y (here abbreviated as 100% of total weight, 0.4% of Y, 4% of Al, 26% of Cr, the rest is Ni", the following abbreviation will be the same Method, no more details) and Ni20Co18Cr12Al0.7Y0.5Hf0.1Si bonding layer powder are put into the powder feeder respectively.

[0074] Step 3: Turn on the oxygen-kerosene supersonic flame spraying equipment, the spraying process parameters are:

[0075] Oxygen flow rate: 38m 3 / h;

[0076] Ker...

Embodiment 2

[0084] Example 2: Preparation of a double-layer structure bonding layer on the surface of IC10 single crystal alloy

[0085] The first step: prepare IC10 single crystal alloy matrix material, clean with anhydrous acetone, use suction sandblasting machine at 0.15Mpa sandblasting gas pressure to perform sandblasting roughening treatment on the sprayed surface, and then use compressed air to blow away the surface residue The sand particles are cleaned again with anhydrous acetone, the substrate is installed on the tooling, and it is to be sprayed.

[0086] Step 2: Put the dried Ni24Cr6Al0.7Y and Ni24Co15Cr13Al0.1Y0.5Hf0.5Si bonding layer powders into the powder feeder respectively.

[0087] Step 3: Turn on the oxygen-kerosene supersonic flame spraying equipment, the spraying process parameters are:

[0088] Oxygen flow rate: 45m 3 / h;

[0089] Kerosene flow rate: 20m 3 / h;

[0090] Carrier gas flow: 0.8m 3 / h;

[0091] Powder feeding rate: 80g / min;

[0092] Swing speed of spray gun: 1000mm / s...

Embodiment 3

[0097] Example 3: Preparation of double-layer structure bonding layer on the surface of IC10 single crystal alloy

[0098] The first step: prepare IC10 single crystal alloy matrix material, clean with anhydrous acetone, use suction sandblasting machine at 0.15Mpa sandblasting gas pressure to perform sandblasting roughening treatment on the sprayed surface, and then use compressed air to blow away the surface residue The sand particles are cleaned again with anhydrous acetone, the substrate is installed on the tooling, and it is to be sprayed.

[0099] Step 2: Put the dried Ni25Cr5Al0.6Y and Ni22Co16Cr11Al1Y0.1Hf0.5Si bonding layer powders into the powder feeder respectively.

[0100] Step 3: Turn on the oxygen-kerosene supersonic flame spraying equipment, the spraying process parameters are:

[0101] Oxygen flow rate: 40m 3 / h;

[0102] Kerosene flow rate: 17m 3 / h;

[0103] Carrier gas flow: 0.5m 3 / h;

[0104] Powder feeding rate: 60g / min;

[0105] Swing speed of spray gun: 800mm / s.

[0...

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Abstract

The invention discloses a bilayer-structure bonding coating on the surface of single crystal alloy and a preparation method of the bilayer-structure bonding coating. The bilayer-structure bonding coating on the surface of the single crystal alloy comprises a single crystal alloy matrix and a bilayer-structure bonding coating body. The bilayer-structure bonding coating body comprises a bonding coating bottom layer and a bonding coating top layer. The bonding coating bottom layer is formed on the surface of the single crystal alloy matrix, the thickness of the bonding coating bottom layer is 50-80 microns, the bonding coating bottom layer contains Ni, Cr, Al and Y, and the weight ratio of Al in the bonding coating bottom layer is 4%-6%. The bonding coating top layer is formed on the other surface, opposite to the single crystal alloy matrix, of the bonding coating bottom layer, the thickness of the bonding coating top layer is 50-80 microns, the bonding coating top layer contains Ni, Co, Cr, Al, Y, Hf and Si, the weight ratio of Al in the bonding coating top layer is 11%-13%, and the thickness ratio of the bonding coating bottom layer and the bonding coating top layer is 8:2-6:4. According to the bilayer-structure bonding coating on the surface of single crystal alloy and the preparation method of the bilayer-structure bonding coating, the influence of the coating on the fatigue performance of the alloy can be reduced, the high-temperature-resistant oxidation performance of the coating on the surface of the alloy is improved, and the high-temperature endurance life of the alloy is prolonged.

Description

Technical field [0001] The invention relates to a double-layer structure bonding layer on the surface of a single crystal alloy and a preparation method thereof, and more specifically a method for preparing a double-layer structure bonding layer on the surface of a single crystal alloy by a supersonic flame spraying process. Background technique [0002] Due to the pursuit of higher thermal efficiency or thrust-to-weight ratio in modern gas turbine engines, the temperature in front of the turbine continues to increase. At present, the temperature in front of the turbine of advanced gas turbine engines has reached 1400 ℃. Even if advanced cooling structure design technology is used, the surface temperature of high-pressure turbine blades exceeds that of alloys. For operating temperature, thermal barrier coating technology must be used to protect the blades. Thermal Barrier Coating (TBC) is a high-temperature structural material surface protection technology that uses the excellent...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/073C22C19/05C22C30/00
CPCC22C19/058C22C30/00
Inventor 何箐邹晗马林吕玉芬汪瑞军
Owner CHINESE ACAD OF AGRI MECHANIZATION SCI
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