Double-layer structural bonding layer on the surface of single crystal alloy and its preparation method

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: 2018-12-21
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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  • Double-layer structural bonding layer on the surface of single crystal alloy and its preparation method
  • Double-layer structural bonding layer on the surface of single crystal alloy and its preparation method
  • Double-layer structural bonding layer on the surface of single crystal alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Example 1: Preparation of a double-layer structural 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 to perform sandblasting roughening on the surface to be sprayed under the pressure of 0.1Mpa sandblasting gas, and then use compressed air to blow off the residue on the surface Sand and clean it again with anhydrous acetone, install the base on the tooling, and wait for spraying.

[0073] The second step: the dry Ni26Cr4Al0.4Y (abbreviation here means: "the total weight is 100%, 0.4% of Y, 4% of Al, 26% of Cr, and the rest is Ni", and the same abbreviation is adopted in the following text way, no more details) and Ni20Co18Cr12Al0.7Y0.5Hf0.1Si bonding layer powder were put into the powder feeder.

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

[0075...

Embodiment 2

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

[0085] Step 1: Prepare the IC10 single crystal alloy substrate material, clean it with anhydrous acetone, use a suction sandblasting machine to perform sandblasting roughening on the surface to be sprayed under the pressure of 0.15Mpa sandblasting gas, and then use compressed air to blow off the residue on the surface Sand and clean it again with anhydrous acetone, install the base on the tooling, and wait for spraying.

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

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

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

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

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

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

[0092] Spray gun swing ra...

Embodiment 3

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

[0098] Step 1: Prepare the IC10 single crystal alloy substrate material, clean it with anhydrous acetone, use a suction sandblasting machine to perform sandblasting roughening on the surface to be sprayed under the pressure of 0.15Mpa sandblasting gas, and then use compressed air to blow off the residue on the surface Sand and clean it again with anhydrous acetone, install the base on the tooling, and wait for spraying.

[0099] The second step: 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, and the spraying process parameters are:

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

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

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

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

[0105] Spray gun swing spe...

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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, in particular to a method for preparing a double-layer structure bonding layer on the surface of a single crystal alloy by using a supersonic flame spraying process. Background technique [0002] Due to the pursuit of higher thermal efficiency or thrust-to-weight ratio of modern gas turbine engines, the temperature before the turbine continues to increase. At present, the temperature before the turbine of advanced gas turbine engines has reached 1400°C. Even with advanced cooling structure design technology, the surface temperature of high-pressure turbine blades exceeds that of alloy The blades must be protected with thermal barrier coating technology due to the high operating temperature. Thermal Barrier Coating (TBC) is a surface protection technology for high-temperature structural materials that utilizes the ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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