High temperature resistance bonding coating used for surface of nickel base alloy fastener and preparation method thereof

A nickel-based alloy and bonding coating technology, which is applied in metal material coating process, coating, ion implantation plating, etc., can solve the uncertainty of coating thickness uniformity and anti-seizing effect, and increase installation and fastening Problems such as eliminating the parts process and reducing the efficiency of assembly work, to achieve the effect of increasing convenience and reliability, small thickness, and convenient assembly

Inactive Publication Date: 2014-05-28
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oxidation of the above materials under oxygen conditions will easily lead to the decline or failure of the anti-adhesive performance, so the anti-adhesive parts must be in low-oxygen or oxygen-free conditions to exert a good effect
At the same time, the process of applying anti-seize agent also increases the process of installing fasteners and reduces assembly work efficiency; the artificial coating process also brings uncertainty to the uniformity of coating thickness and anti-seize effect

Method used

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  • High temperature resistance bonding coating used for surface of nickel base alloy fastener and preparation method thereof
  • High temperature resistance bonding coating used for surface of nickel base alloy fastener and preparation method thereof
  • High temperature resistance bonding coating used for surface of nickel base alloy fastener and preparation method thereof

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preparation example Construction

[0022] The above-mentioned preparation method for the high-temperature-resistant bonding coating on the surface of nickel-based alloy fasteners comprises the following steps:

[0023] The first step: cleaning the substrate: first degrease, remove dust and remove the insulating layer from the nickel-based fastener substrate, then place the nickel-based fastener substrate in a vacuum chamber to generate plasma, induce ion generation and bombard nickel The surface of the base fastener substrate, the bombardment time is 5-20 minutes.

[0024] The second step: Deposit the intermediate coating: use the vapor deposition method to deposit the intermediate coating on the surface of the nickel-based fastener substrate cleaned in the first step. When the intermediate coating is a Cr layer, pure Cr is used as the target or evaporation source A Cr layer is deposited on the surface of the nickel-based fastener substrate by magnetron sputtering or ion plating, and the thickness of the middle...

Embodiment 1

[0031] The base of the nickel-based fastener is an M6 bolt / nut whose material grade is G4169 (bolt / nut means a bolt and a nut). Deposition of high temperature bond resistant coatings on bolt / nut surfaces. The intermediate coating is a Cr layer with a thickness of 0.2um. The surface coating is composed of CrN phase and Ag phase, and the atomic percentage of Ag atoms in the surface coating is 3%.

[0032] Preparation process: first, surface cleaning treatment is performed on the M6 ​​bolt / nut whose material grade is G4169. The cleaning treatment includes conventional degreasing, dust removal and insulation removal. Then the bolt / nut is placed in a vacuum chamber, and Ar gas with a pressure of 1Pa is introduced to make the bolt / nut in a negative bias state of 1000V. The negative bias voltage triggers plasma generation, and the ion bombards the surface of the bolt / nut. The bombardment time is 5-20 minutes; deposit a Cr layer on the surface of the bolt / nut by magnetron sputtering...

Embodiment 2

[0034] The base of nickel-based fasteners is M24 bolt / nut whose material grade is Incon718. Deposition of high temperature bond resistant coatings on bolt / nut surfaces. Intermediate coating is Ni 1-x Cr x Concentration gradient layer with a thickness of 0.5um. The surface coating is composed of CrN phase and Ag phase, and the atomic percentage of Ag atoms in the surface coating is 6%.

[0035] Preparation process: First, the surface cleaning treatment is performed on the M24 bolt / nut whose material grade is Incon718. The cleaning treatment includes conventional degreasing, dust removal and insulation removal. Then the bolt / nut is placed in a vacuum chamber, and Ar gas with a pressure of 1Pa is introduced to make the bolt / nut in a negative bias state of 1000V. The negative bias voltage triggers plasma generation, and the ion bombards the surface of the bolt / nut. The bombardment time is 5-20 minutes. Ni was then deposited by double-target sputtering co-deposition 1-x Cr x...

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Abstract

The invention discloses a high temperature resistance bonding coating used for the surface of a nickel base alloy fastener, which comprises a middle coating and a surface coating, wherein the middle coating is bonded between the surface coating and the base of the nickel base alloy fastener, the middle coating is a Cr layer or an Ni1-xCrx layer, wherein X is larger than or equal to 0 and smaller than or equal to 1; the surface coating consists of Crn phase and Ag phase, the atomic percentage content of Ag atoms in the surface coating is 1%-10%, the atomic percentage content of Cr atoms in the surface coating is 45%-66%, and the atomic percentage content of N atoms in the surface coating is 30-49%. Simultaneously, the preparation method of the high temperature resistance bonding coating is further disclosed, and comprises the following steps: firstly, cleaning the base; secondly, depositing the middle coating; and thirdly, depositing the surface coating. After the high temperature resistance bonding coating is deposited on the surface of the nickel base alloy fastener, the nickel base alloy fastener can be prevented from being bitten under high temperature static conditions so that the nickel base alloy fastener is easy to disassemble.

Description

technical field [0001] The invention relates to a coating and a preparation method thereof, in particular to a high-temperature-resistant adhesive coating for the surface of a nickel-based alloy fastener and a preparation method thereof. Background technique [0002] Nickel-based superalloy fasteners are widely used in the connection of components under high temperature conditions due to their ability to withstand certain stress at high temperatures of 600-1200 ° C and have oxidation resistance or corrosion resistance. However, under high temperature and high stress coupling conditions, nickel-based superalloy fasteners will be severely bonded (or seized), making disassembly difficult. Removing fasteners by destructive methods, such as cutting, is time-consuming and labor-intensive, and can damage the connected components. For working conditions that require frequent disassembly (such as high-temperature equipment research and development), the bonding problem of fasteners ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06
Inventor 张旭海巫亮仇月东蒋建清
Owner SOUTHEAST UNIV
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