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A kind of preparation method of single crystal turbine blade tip nano particle reinforced wear-resistant coating

A technology of turbine blades and wear-resistant coatings, applied in coatings, metal material coating processes, etc., can solve problems affecting engine performance and achieve the effect of improving performance

Active Publication Date: 2020-01-03
INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the gradual improvement of the performance of aero-engines, the inlet temperature is getting higher and higher, and the use of single crystal superalloy turbine blades is also increasing. , corrosion and other problems, and the ZrO 2 MCrAlY-based and MCrAlY-based abradable coatings have high hardness. During the working process of the engine, the blade tip is often shortened or the blade material and the abradable coating material are transferred to each other, which affects the performance of the engine.

Method used

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  • A kind of preparation method of single crystal turbine blade tip nano particle reinforced wear-resistant coating
  • A kind of preparation method of single crystal turbine blade tip nano particle reinforced wear-resistant coating
  • A kind of preparation method of single crystal turbine blade tip nano particle reinforced wear-resistant coating

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Experimental program
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Effect test

Embodiment 1

[0032] Nano Y with a nominal particle size of 50nm 2 o 3 The powder is added to the NiCoCrAlY anti-oxidation powder at a weight ratio of 3%. After ball milling in a planetary ball mill at a speed of 400r / min for 4 hours, it is placed in a hot isostatic pressing device with a heating temperature of 1250 oC , the pressure is 100MPa, and the alloy composite material block with a density of 90% is formed after holding the pressure for 1 hour, and then an alloy electrode rod with a diameter of 4mm is prepared by wire cutting. Using high-energy micro-arc spark deposition equipment, the DD26 single crystal superalloy turbine blade was polished with 1000# sandpaper on the crystal surface of the blade tip, and then cleaned and dried with acetone and then connected to the negative electrode as the base material, nano-Y 2 o 3 The particle-reinforced NiCoCrAlY alloy rod is connected to the positive electrode, and the nano-Y 2 o 3 Particle-reinforced NiCoCrAlY wear-resistant sealing c...

Embodiment 2

[0034] Add nano-TaC powder with a nominal particle size of 100nm to NiCoCrAlTaY anti-oxidation powder at a weight ratio of 4%. After ball milling in a planetary ball mill at a speed of 500r / min for 2 hours, put it into a hot isostatic pressing device and heat it to a temperature of 1300 oC, the pressure is 150MPa, and after holding the pressure for 1.5 hours, an alloy composite material block with a density of 95% is formed, and then an alloy electrode rod with a diameter of 6mm is prepared by wire cutting. Using high-energy micro-arc spark deposition equipment, the PWA1484 turbine blade was polished with 1500# sandpaper on the crystal surface of the blade tip, then cleaned and dried with acetone, and then connected to the negative electrode as the base material, NiCoCrAlTaY alloy rod reinforced with nano-TaC particles Connected to the positive electrode, under the process parameters of voltage 80V, capacitance 350μf, pulse frequency 400Hz, inclination angle 60°, and relative...

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Abstract

The invention discloses a preparation method of a nanparticle reinforced wear-resistant coating layer on a blade top of a single-crystal turbine blade. The preparation method is characterized by taking a single-crystal high-temperature alloy turbine blade as a base material and a nano ceramic particle-doped reinforced anti-oxidation alloy composite material as a coating material, and by adopting ahigh-energy micro-arc spark deposition technology, thus preparing a nano ceramic particle reinforced wear-resistant coating layer in oriented epitaxial growth with a structure of the base material. According to the preparation method disclosed by the invention, by virtue of a high-temperature gradient formed during a high-energy micro-arc spark deposition process, a high cooling speed and a condition close to one-dimensional rapid solidification, nano ceramic particles are uniformly distributed in a coating layer, and the oriented epitaxial growth of the microstructure of the coating layer iskept, so that good high-temperature wear resistance is obtained; meanwhile, due to extremely high energy density, the width of a heat affected zone in an interface between the coating layer and the single-crystal turbine blade is extremely wide, and change of the microstructure of a single-crystal matrix and generation of heat cracks are avoided.

Description

technical field [0001] The invention relates to a method for preparing a single-crystal turbine blade tip nano particle enhanced wear-resistant coating, which belongs to the technical field of metal surface coating preparation. Background technique [0002] In order to improve the working efficiency of aero-engines and reduce fuel consumption and cost, it is crucial to establish a sealing coating system between the high-speed rotating rotor blades and stator components. The sealing coating system generally consists of two parts, namely the abradable sealing coating applied on the stator parts and the wear-resistant coating applied on the rotor parts such as compressors and turbine blades. With the gradual improvement of the performance of aero-engines, the inlet temperature is getting higher and higher, and the use of single crystal superalloy turbine blades is also increasing. , corrosion and other problems, and the ZrO 2 The hardness of the MCrAlY-based and MCrAlY-based ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C26/02
CPCC23C26/02
Inventor 王德谢玉江王文琴王明生陈新贵迟长泰陆德平
Owner INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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