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Surface micro-pit self-lubricating coating and preparation method thereof

A technology of self-lubricating coating and micro-pit, which is applied in coating, metal material coating process, etc., can solve the problems of anti-friction performance and structural wear of cladding layer, and achieve excellent lubricating performance, high bonding strength and good effect The effect of aging

Pending Publication Date: 2021-09-28
XIAN TECHNOLOGICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the lack of anti-friction performance of the cladding layer in the prior art and the problem of structural wear caused by the reduction of the actual contact area due to the texture, the present invention provides a self-lubricating coating with micro-pit surface with high wear resistance and long service life and its preparation method

Method used

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  • Surface micro-pit self-lubricating coating and preparation method thereof
  • Surface micro-pit self-lubricating coating and preparation method thereof
  • Surface micro-pit self-lubricating coating and preparation method thereof

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Embodiment 1

[0026] Example 1, see figure 1 and figure 2 , the preparation of a surface micropit self-lubricating coating, comprising the following steps:

[0027] (1) Preparation of coating:

[0028] 1) Substrate 3 is 42CrMo steel, the surface of which is roughened and the surface of the sample is cleaned.

[0029] 2) The powder is made of Stellite Ni60 alloy powder, mixed evenly in a ball mill, and dried. The chemical composition and mass percentage of each element of the powder are: C: 0.76%, Cr: 15.99%, B: 3.02%, Si: 3.98%, Fe : 14.42%, Ni: balance, powder particle size 53-150um.

[0030] 3) Laser cladding coating on the surface of the alloy, the alloy powder is blown to the surface of the alloy steel by coaxial powder feeding method and using the protective gas as the powder carrier gas.

[0031] 4) The coating is prepared by laser cladding, the laser power is 1800w, the laser scanning rate is 600mm / min, the powder feeding rate is 25g / min, the laser spot is 5*5mm, and the coating...

Embodiment 2

[0051] The difference between embodiment 2 and embodiment 1 lies in that: in step (2), electric discharge drilling technology is used to process micropits on the surface of the coating, and the size of the micropits array is 200um in diameter, 50um in depth, and 500um in spacing. Others are with embodiment 1.

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Abstract

The invention discloses a surface micro-pit self-lubricating coating and a preparation method thereof. The self-lubricating coating comprises that a nickel-based coating is arranged on a base material surface in a laser cladding mode; a micro-pit texture is machined on the surface of the nickel-based coating through electric spark machining; and a solid lubricant and resin are mixed and then are filled into the micro-pit texture. According to the surface micro-pit self-lubricating coating and the preparation method thereof, three antifriction wear-resistant methods, namely the high hardness performance of the nickel-based coating, the antifriction performance of the surface micro-pit texture and the lubricating performance of the lubricant, are combined, so that the obtained coating has better acting time efficiency, the service life is also prolonged, and the coating has excellent lubricating performance, wear resistance, self-repairability and stability; and according to the structure, the surface friction resisting and antifriction performance is improved, meanwhile, surface self-lubrication is achieved, and the use requirements of parts under harsh working conditions are met.

Description

technical field [0001] The invention belongs to the field of surface engineering, and in particular relates to a micropit self-lubricating coating on the surface and a preparation method thereof. Background technique [0002] During the service process of mechanical parts, the friction and wear behavior between the contacting surface interfaces directly affects the service life, working efficiency, bearing capacity and safety factor of the entire equipment. Therefore, how to improve its surface wear resistance has always been the focus of research. The study found that the use of surface modification technology can further enhance its anti-wear and anti-friction performance on the basis of maintaining the original advantages of the substrate. As an advanced surface modification technology, laser cladding utilizes the characteristics of extremely high focusing energy of high-energy laser beams to instantly completely melt the powder preset on the surface of the substrate or ...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 刘锡尧李宾张君安刘波卢志伟肖强董皓赵晓龙王亚娟
Owner XIAN TECHNOLOGICAL UNIV
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