Preparation method of wear-resistant and anti-friction coating with highly dispersed lubricating phase

A dispersion distribution and anti-friction coating technology, which is applied in the coating, metal material coating process, fusion spraying, etc., can solve the problem of low coating strength and bonding strength, which cannot meet the requirements of turbomachinery. Affect the anti-friction and wear resistance of the coating, etc., to achieve the effect of optimizing the anti-friction performance, excellent bonding strength, and improving the bonding strength

Active Publication Date: 2020-08-28
XI AN JIAOTONG UNIV +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle jet density of these traditional thermal spraying technologies is low, resulting in low strength and bonding strength of the prepared coating, high porosity, and general performance of the coating.
Although the late supersonic flame spraying (HVOF) technology has improved the performance of the anti-friction and wear-resistant coating, there are still a few unmelted particles in the coating, which affects the anti-friction and wear resistance of the coating to a certain extent. , can not well meet the requirements of the use of turbomachinery

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of wear-resistant and anti-friction coating with highly dispersed lubricating phase
  • Preparation method of wear-resistant and anti-friction coating with highly dispersed lubricating phase
  • Preparation method of wear-resistant and anti-friction coating with highly dispersed lubricating phase

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of the wear-resistant anti-friction coating with highly dispersed lubricating phase of the present invention includes the following steps:

[0032] 1) Pre-treat the surface of the substrate before spraying.

[0033] 2) Pre-heat treatment of the pre-treated substrate.

[0034] 3) Adopting internal powder feeding high-energy plasma spraying method to spray raw materials on the surface of the preheated substrate to prepare anti-friction and wear-resistant coating.

[0035] 4) Machining and polishing the surface of the metal parts after spraying.

[0036] The specific process of the pre-treatment in the step 1) is: firstly perform degreasing and decontamination and grinding and rust removal, then use acetone ultrasonic cleaning, after cleaning, put it in a drying box for drying, and finally use white corundum (#24) Sandblasting.

[0037] In the step 2), the spray gun is used for preheating, and the temperature is controlled at about 80-100°C.

[0038] The proces...

Embodiment 1

[0041] This embodiment uses Q235 carbon structural steel as the matrix, the size is 45×20×5mm, and the mass percentage is: ≤0.22% of C, ≤1.0% of Si, ≤1.4% of Mn, ≤0.044% of P, ≤0.35 % Si, ≤0.05% S, and the balance is Fe.

[0042] The coating is a high wear-resistant coating with a thickness of 1.6mm on the substrate surface, and the coating material is nickel-coated graphite powder.

[0043] The particle size of the Ni-C powder (nickel-coated graphite powder) ranges from 30 to 150 μm; in terms of weight percentage, the Ni content is 75 wt%, and the C content is 25 wt%.

[0044] The specific implementation steps for preparing a wear-resistant anti-friction coating with a highly dispersed lubricating phase are as follows:

[0045] 1) Pretreatment of substrate surface

[0046] The surface of the Q235 carbon structural steel used as the base material is first degreasing, decontamination, sanding and rust removal, and then ultrasonically cleaned with acetone. After cleaning, it is placed in...

Embodiment 2

[0052] This embodiment uses Q235 carbon structural steel as the matrix, the size is 45×20×5mm, and the mass percentage is: ≤0.22% of C, ≤1.0% of Si, ≤1.4% of Mn, ≤0.044% of P, ≤0.35 % Si, ≤0.05% S, and the balance is Fe.

[0053] The coating is a high wear-resistant coating with a thickness of 1.8mm on the substrate surface, and the coating material is AlSi and polyphenylene resin composite powder.

[0054] The particle size of the AlSi and polyphenylene resin composite powder (AlSi-polyphenylene resin powder) ranges from 20 to 100 μm; in terms of weight percentage, the AlSi content is 60wt%, and the polyphenylene resin content is 40wt%.

[0055] The specific implementation steps for preparing a wear-resistant anti-friction coating with a highly dispersed lubricating phase are as follows:

[0056] 1) Pretreatment of substrate surface

[0057] The surface of the Q235 carbon structural steel sheet as the base material is first degreasing, decontamination and grinding and derusting, and t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of a wear-resistant anti-friction coating with a highly dispersed and distributed lubricating phase. According to the preparation method, powder such as Ni-C, AlSi-polyphenyl ester and NiCr-BN-MoS2 which have the self-lubricating property is used as a raw material, and an internal powder feeding high-energy plasma spraying method is adopted for formingthe wear-resistant anti-friction coating on a metal substrate. According to the preparation method, through reasonable thermal spraying process parameters, the spraying technological process is strictly controlled, the porosity of the coating is reduced, the hardness and the bonding force are improved, the comprehensive mechanical properties are greatly improved, the wear-resisting anti-frictionperformance is obviously optimized, and the work service life of turbomachinery is effectively prolonged.

Description

Technical field [0001] The invention belongs to the field of metal surface modification, and specifically relates to a preparation method of a wear-resistant anti-friction coating with a highly dispersed lubricating phase. Background technique [0002] Turbine machinery is a kind of dynamic fluid machinery that generates force interaction between fluid and blades through the high-speed rotation of blades to realize energy conversion. It is widely used in the manufacture of steam turbines, engines and other equipment. However, due to factors such as assembly tolerance, thermal expansion, centrifugal strain, and vibration displacement in the production and service of turbomachinery, there is a large or small gap between the blade and the casing, which reduces the efficiency of the equipment and the service life. Significantly shortened. In recent years, spraying technology has been widely used in the turbomachinery industry due to its advantages such as good sealing effect, simple...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/06
CPCC23C4/06C23C4/134
Inventor 白宇丁飞郭文勇韩增福柳琪
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap