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A blade tip superhard cutting coating with internal coating and preparation method thereof

A hard cutting and coating technology, applied in the coating, metal material coating process, fusion spraying, etc., can solve the problem of low bonding strength between superhard particles and bonding, achieve good wettability, improve coating bonding Strength, effect of improving wear resistance and cutting performance

Active Publication Date: 2022-02-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problem of low bonding strength between superhard particles and bonding phase in the blade tip wear-resistant coating in the prior art, the present invention proposes a blade tip superhard cutting coating with an internal coating and a preparation method thereof

Method used

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  • A blade tip superhard cutting coating with internal coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] The blade tip superhard cutting coating of the inner wrapping coating in this embodiment is a Ni71CrSi-Ni-cBN coating: the cubic boron nitride particles with an average particle size of 50 μm are exposed on the outside, and the inside is bonded by the metal nickel coating and the Ni71CrSi bonding alloy layer On the end face of the titanium alloy TC4 tip base, the Ni71CrSi bonding alloy layer forms a firm metallurgical bond with the TC4 tip base and wraps 0.5 times the height of the cubic boron nitride particles, forming sharply exposed outer edges and corners of the cubic boron nitride particles. The Ni71CrSi bonding alloy has good interface wettability and a cutting coating that is firmly bonded to the end surface of the TC4 blade tip substrate.

[0035] The specific preparation method of the blade tip superhard cutting coating of the inner wrapping coating of this embodiment includes the following steps:

[0036]1) Preparation of bonding alloy layer: decontaminate and...

Embodiment 2

[0041] The blade tip superhard cutting coating of the internal wrapping coating in this embodiment is a Ti20Zr25Cu10Ni-Ti-cBN coating: the cubic boron nitride particles with an average particle size of 80 μm are exposed on the outside, and the inside is bonded by the metal titanium coating and the Ti20Zr25Cu10Ni bonding alloy layer On the end surface of the nickel-based superalloy GH4037 tip substrate, the Ti20Zr25Cu10Ni bonding alloy layer forms a firm metallurgical bond with the GH4037 tip substrate and wraps 0.5 times the height of the cubic boron nitride particles, forming a sharp exposure of the outer corners of the cubic boron nitride particles 1. The cutting coating has good interface wettability with Ti20Zr25Cu10Ni bonding alloy and is firmly combined with the end surface of GH4037 blade tip substrate.

[0042] The specific preparation method of the blade tip superhard cutting coating of the inner wrapping coating of this embodiment includes the following steps:

[004...

Embodiment 3

[0048] The blade tip superhard cutting coating of the inner wrapping coating of this embodiment is Ni71CrSi-Ni-diamond coating: the diamond particles with an average particle diameter of 120 μm are exposed on the outside, and the inside is combined on the TC4 blade through the metal nickel coating and the Ni71CrSi bonding alloy layer. On the end surface of the tip substrate, the Ni71CrSi bonding alloy layer forms a firm metallurgical bond with the TC4 tip substrate and wraps 0.7 times the height of the diamond particles, forming sharp exposed edges and corners of the diamond particles, good wettability with the interface of the Ni71CrSi bonding alloy and The TC4 tip base end face incorporates a robust cutting coating.

[0049] The specific preparation method of the blade tip superhard cutting coating of the inner wrapping coating of this embodiment includes the following steps:

[0050] 1) Preparation of bonding alloy layer: decontaminate and degrease the surface of the tip su...

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Abstract

The invention discloses a blade tip superhard cutting coating with a coating inside and a preparation method thereof, belonging to the technical field of material surface modification and coating. The coating of the invention is composed of superhard ceramic particles and a bonding alloy layer One side of the superhard ceramic particles wraps the coating, and the other side is exposed, and one side of the superhard ceramic particles wrapping the coating is embedded in the bonding alloy layer, and is firmly bonded to the end surface of the blade tip substrate through the bonding alloy layer, It forms a blade tip superhard cutting coating with sharp outer edges and inner coatings. The outer edges and corners of the coating are sharp, which can be used to quickly cut the abradable sealing coating to prevent the sharp temperature rise of the blade tip. By preparing a layer of coating on the surface of superhard ceramic particles to make up for the difference in properties between superhard ceramic particles and binder phase materials, the bonding strength of the coating can be effectively improved without changing the good cutting effect of superhard ceramic particles.

Description

technical field [0001] The invention belongs to the technical field of material surface modification and coating, and in particular relates to a blade tip superhard cutting coating with an internal coating and a preparation method thereof. Background technique [0002] As an aircraft power plant, an aeroengine has a decisive influence on the performance of an aircraft. As the core part of the aero-engine structure, the blade determines the important performance of the engine such as working efficiency, stability, reliability and durability, and it is of great significance to ensure its working efficiency and safe rotation. [0003] Tip clearance has a significant impact on compressor and turbine efficiency, engine power and fuel consumption. Through the gap control, the operating efficiency of the engine can be improved, the fuel consumption can be reduced, and its reliability and stability can be guaranteed at the same time. If the gap is too large, it will cause a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C4/08C23C4/134C23C4/137C23C4/18C23C14/35C23C14/18C23C14/06C23C26/00
CPCC23C4/06C23C4/08C23C4/134C23C4/137C23C4/18C23C14/223C23C14/35C23C14/185C23C14/0641C23C26/00
Inventor 杨冠军石秋生刘梅军陈林李长久
Owner XI AN JIAOTONG UNIV
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