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Preparation method of wear-resistant and anti-locking ni-agpd composite coating on the surface of aviation bolts

A composite coating, anti-locking technology, applied in the direction of coating, superimposed layer plating, metal material coating process, etc., can solve problems such as incompatibility, achieve strong adhesion, good thread seizure, flight life prolonged effect

Active Publication Date: 2019-11-12
西安赛福斯材料防护有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is not suitable for treatment with lubricants

Method used

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  • Preparation method of wear-resistant and anti-locking ni-agpd composite coating on the surface of aviation bolts
  • Preparation method of wear-resistant and anti-locking ni-agpd composite coating on the surface of aviation bolts
  • Preparation method of wear-resistant and anti-locking ni-agpd composite coating on the surface of aviation bolts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the present embodiment comprises the following steps:

[0028] Step 1. Bolt polishing and cleaning: Use a vibration polishing machine to vibrate and polish the bolts. The time of vibration polishing is 15 minutes, and then use industrial degreasing agent, absolute ethanol and deionized water to perform ultrasonic cleaning in sequence. The time of each cleaning is the same. During the ultrasonic cleaning process, the temperature is controlled at 15°C to 40°C; during vibration polishing, add polishing liquid and white corundum balls with a diameter of 0.5mm to the vibratory polishing machine. The polishing liquid matches the threaded surface of the polished bolt, and the polishing liquid is an alumina polishing liquid; the time of vibration polishing is 15 minutes; the mass ratio of the white corundum ball to the alumina polishing liquid is 10:1; the bolt is for aviation TC4 titanium alloy bolts; the industrial degreaser is a common commercially ...

Embodiment 2

[0035] The preparation method of the present embodiment comprises the following steps:

[0036] Step 1. Bolt polishing and cleaning: Use a vibration polishing machine to perform vibration polishing on the bolts. The vibration polishing time is 20 minutes, and then use industrial degreasing agent, absolute ethanol and deionized water to perform ultrasonic cleaning in sequence. During the ultrasonic cleaning process, the temperature is controlled at 15°C to 40°C; when vibrating polishing, add polishing liquid and white corundum balls with a diameter of 3mm to the vibrating polishing machine. Liquid cooperates the threaded surface of polishing bolt, and described polishing liquid is diamond polishing liquid; The mass ratio of described white corundum ball and diamond polishing liquid is 10:1; Described bolt is aviation TC11 titanium alloy bolt; The industrial degreasing The degreaser is a common commercially available degreaser;

[0037] Step 2, thread sandblasting: perform sand...

Embodiment 3

[0051] The preparation method of the present embodiment comprises the following steps:

[0052] Step 1. Bolt polishing and cleaning: Use a vibration polishing machine to vibrate and polish the bolts. The time of vibration polishing is 30 minutes, and then use industrial degreasing agent, absolute ethanol and deionized water to perform ultrasonic cleaning in sequence. The time of each cleaning is the same. During the ultrasonic cleaning process, the temperature is controlled to be 15°C to 40°C; when vibrating polishing, add polishing liquid and white corundum balls with a diameter of 5mm to the vibrating polishing machine, and the white corundum balls are used as the abrasive material of the vibrating machine. Polishing fluid matches the threaded surface of the polished bolt, and the polishing fluid is an alumina polishing fluid; the mass ratio of the white corundum ball and the alumina polishing fluid is 10:1; the bolt is a 316 stainless steel bolt for aviation; the industrial ...

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Abstract

The invention discloses a method for preparing a wear-resistant and anti-locking Ni-AgPd composite coating on the surface of aviation bolts. The method includes: 1. polishing and cleaning the bolts; 2. sandblasting the bolts; 3. Put the bolts into the vacuum chamber, install the Ni target and the AgPd target on the cathode target position of the arc ion plating respectively, start the cathode Ni target arc to bombard the bolt, and remove the passivation layer on the thread surface by sputtering cleaning; 4. Start the cathode Ni target Depositing a Ni transition layer; 5. Turn on the AgPd target arc to bombard the bolt to deposit the AgPd coating, and finally obtain the Ni-AgPd composite coating on the thread surface of the bolt. The invention utilizes the arc ion plating technology to prepare a uniform and compact Ni-AgPd composite coating on the surface of the stainless steel / titanium alloy bolt used in aviation, and has a good anti-friction effect. The AgPd coating is guaranteed by adjusting the degree of vacuum, the magnitude of the arc current and the coating time The content of Pd in ​​the medium is stable at 18% to 23%, so that the anti-locking performance of the Ni-AgPd coating can be optimized.

Description

technical field [0001] The invention belongs to the technical field of coating preparation, in particular to a method for preparing a wear-resistant and anti-locking Ni-AgPd composite coating on the surface of aviation bolts. Background technique [0002] With the rapid development of aerospace technology, a large number of new aircraft have been continuously developed, and the fasteners used in aircraft have also ushered in a new era of development. Among them, threaded connections are the most widely used. Bolts and nuts of various sizes and shapes can be found everywhere in aircraft engines and large component assemblies. There are more than 400,000 bolt fasteners on an ordinary passenger plane. During the routine repair and maintenance of the aircraft, detachable bolts and screws need to be installed repeatedly, and the stainless steel / titanium alloy threaded connection is prone to locking during repeated disassembly and assembly. Relevant studies have shown that the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/34C23C14/16C23C14/02C23C14/54C23C28/02
CPCC23C14/021C23C14/028C23C14/165C23C14/34C23C14/548C23C28/021
Inventor 呼丹高广睿王宝云屈静李超众颜学柏李争显
Owner 西安赛福斯材料防护有限责任公司
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