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A high-temperature self-lubricating wear-resistant powder coating

A high-temperature self-lubricating, powder coating technology, applied in powder coatings, coatings, etc., can solve the problems of friction pair material wear, limited coating application, high friction coefficient, and achieve excellent anti-friction and wear resistance, fine structure, combined with high intensity effect

Inactive Publication Date: 2011-12-14
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as thermal spraying, PVD and laser cladding to prepare various ceramic-based composite coatings, which have high hardness and high friction coefficient during the sliding process, and the wear of the friction pair material is serious, which greatly limits the coating. Application on high-speed running machinery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation steps of this embodiment are as described above, wherein:

[0020] The high-temperature self-lubricating wear-resistant powder coating of this embodiment is made up of raw material by mass percentage: nickel powder 20%, titanium carbide powder 60%, silver powder 20%; Wherein the particle diameter of nickel powder is 200 orders, and the particle diameter of titanium carbide powder is 200 mesh, the particle size of the silver powder is 600 mesh.

[0021] Laser cladding parameters during preparation and coating in this embodiment: laser power is 2.0 KW, scanning speed is 4.1 m / min, and spot diameter is 2 mm.

[0022] The laser cladding coating obtained after coating with the powder coating prepared in this example has good uniformity and compactness after testing, and the cladding layer and the substrate form a metallurgical diffusion bond; the surface hardness of the cladding coating HV>1550, has good Excellent wear resistance; the cladding coating has ex...

Embodiment 2

[0024] The preparation steps of this embodiment are as described above, wherein:

[0025] The high-temperature self-lubricating wear-resistant powder coating of this embodiment is made up of raw material by mass percentage: 30% of nickel powder, 60% of titanium carbide powder, 10% of silver powder; Wherein the particle diameter of nickel powder is 300 orders, and the particle diameter of titanium carbide powder is 300 mesh, the particle size of the silver powder is 700 mesh.

[0026] Laser cladding parameters during coating preparation in this embodiment: laser power is 2.4KW, scanning speed is 6.2m / min, and spot diameter is 3mm.

[0027] The laser cladding coating obtained after coating with the powder coating prepared in this example has good uniformity and compactness in the test, and the cladding layer and the substrate form a metallurgical diffusion bond; the surface hardness of the cladding coating HV>1450, has good Excellent wear resistance; the cladding coating has ex...

Embodiment 3

[0029] The preparation steps of this embodiment are as described above, wherein:

[0030] The high-temperature self-lubricating wear-resistant powder coating of this embodiment is made up of raw material by mass percentage: nickel powder 30%, titanium nitride powder 50%, silver powder 20%; Wherein the particle diameter of nickel powder is 400 orders, the particle diameter of titanium nitride powder It is 400 mesh, and the particle size of silver powder is 800 mesh.

[0031] Laser cladding parameters during preparation and coating in this embodiment: laser power is 2.4KW, scanning speed is 8.2m / min, and spot diameter is 4mm.

[0032] The laser cladding coating obtained after coating with the powder coating prepared in this example has good uniformity and compactness after testing, and the cladding layer and the substrate form a metallurgical diffusion bond; the surface hardness of the cladding coating HV>1500, has good Excellent wear resistance; the cladding coating has excell...

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Abstract

A high-temperature self-lubricating and wear-resistant powder coating, the raw materials of which are composed of 20-30% of nickel powder, 50-60% of titanium carbide powder or titanium nitride powder, and 10-20% of silver powder according to mass percentage. Use the powder coating of the present invention to spray on the metal substrate after sandblasting and roughening according to the process parameters of laser cladding in the prior art. The material is metallurgically combined and has high bonding strength. The hardness HV is ≥ 1500. The high-temperature self-lubricating wear-resistant coating has excellent anti-friction and wear-resisting properties. The high-temperature friction test temperature is 400-450°C, and its friction coefficient is 0.20- 0.30, with good wear resistance.

Description

1. Technical field [0001] The invention relates to a powder coating clad on the surface of carbon steel, in particular to a high-temperature self-lubricating wear-resistant powder coating. 2. Background technology [0002] High-temperature corrosion and wear of metal materials has become one of the main failure modes of components, and the economic losses caused are astonishing. In order to improve the surface properties of parts, it is an economical and very effective way to prepare high-performance coatings on the surface of metal substrates. With the development of wear-resistant and anti-friction technology, the research and application of composite coatings are becoming more and more extensive. Such as thermal spraying, PVD and laser cladding to prepare various ceramic-based composite coatings, which have high hardness and high friction coefficient during the sliding process, and the wear of the friction pair material is serious, which greatly limits the coating. Appl...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/03
Inventor 罗来马吴玉程程继贵
Owner HEFEI UNIV OF TECH
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