A solid lubrication coating preparing method utilizing laser thermal-mechanical coupled texturing

A technology of solid lubricating coating and thermal coupling, applied in laser welding equipment, manufacturing tools, welding equipment, etc., can solve problems such as friction and wear failure, achieve simple operation, easy industrialization, and solve lubrication and wear problems

Active Publication Date: 2018-11-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mainly used to solve the problem of friction and wear failure of oil-free lubricated parts such as aero-engine bearings. At the same time, the laser shock surface can enhance the surface mechanical properties and improve the service life of the parts

Method used

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  • A solid lubrication coating preparing method utilizing laser thermal-mechanical coupled texturing
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  • A solid lubrication coating preparing method utilizing laser thermal-mechanical coupled texturing

Examples

Experimental program
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Effect test

example example 1

[0029] 1. Polish the surface of the bearing substrate to ensure that the surface roughness Ra of the substrate is lower than 0.1 μm. The SPI nanofiber laser is used for laser microtexture treatment on the surface. The texture morphology is pits. The pit parameters are 100 μm in diameter, 20 μm in depth, and 30% in texture density. The laser parameters are power of 50W, pulse width of 500ns, and the same point is cycled multiple times for processing, and the number of repetitions is 10 times. The shape of the pit is as figure 1 shown. Use a polishing machine to post-process the substrate to remove slag and flash.

[0030] 2. Pre-coat a layer of solid lubricating powder on the surface of the substrate. The powder is Gr (nano): MoS2 (nano): CNTs mixed at 4:1:0.4. The solid lubricant covers the surface with a thickness of 100 μm. Schematic such as figure 2 shown.

[0031] 3. Apply black paint on the surface of the substrate to form an absorption layer, wrap the substrate co...

example example 2

[0035] 1. Polish the surface of the engine plunger pump substrate to ensure that the surface roughness Ra of the substrate is lower than 0.1 μm. The SPI nanofiber laser is used for laser micro-texture treatment on the surface. The texture morphology is pits. The pit parameters are 50 μm in diameter, 10 μm in depth, and 20% of the texture density. The laser parameters are 30W power, 100ns pulse width, and the same point is cycled multiple times for processing, and the number of repetitions is 5 times. Schematic such as figure 1 As shown, the shape of the pit is as figure 2 shown. Use a polishing machine to post-process the substrate to remove slag and flash.

[0036] 2. Pre-coat a layer of solid lubricating powder on the surface of the substrate. The powder is mixed with nano-indium powder and nano-nickel powder at a ratio of 1:1. The solid lubricant covers the surface with a thickness of 0.5 μm. Schematic such as image 3 shown.

[0037] 3. Apply black paint on the sur...

example example 3

[0041] 1. Polish the surface of the engine valve lifter to ensure that the surface roughness Ra of the substrate is lower than 0.1 μm. The SPI nanofiber laser is used for laser micro-texture treatment on the surface. The texture morphology is pits. The pit parameters are 200 μm in diameter, 50 μm in depth, and 50% of the texture density. The laser parameters are as follows: the power is 100W, the pulse width is 2000ns, and the same point is cycled multiple times for processing, and the number of repetitions is 15 times. Schematic such as figure 1 As shown, the shape of the pit is as figure 2 shown. Use a polishing machine to post-process the substrate to remove slag and flash.

[0042] 2. Pre-coat a layer of solid lubricating powder on the surface of the substrate, the powder is Gr (nano): MoS2 (nano): CNTs: WS 2 (Nano): Nano indium powder and nano nickel powder are mixed according to 4:1:0.4:1:1:1. The solid lubricant covers the surface with a thickness of 2mm. Schemat...

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Abstract

The invention discloses a solid lubrication coating preparing method utilizing laser thermal-mechanical coupled texturing, and relates to the technical field of lubrication and antifriction of the material surface. A micro pit texture is processed on the metal matrix surface by utilizing a laser thermal effect, the matrix is pre-coated with a layer of solid lubrication powder after the matrix is polished, then impact reinforcement processing is performed on the matrix surface by utilizing a shock wave force effect formed by laser impact, pits are filled with a solid lubricant agent, the matrixsurface is covered with a layer of a compact solid lubrication coating simultaneously, after a friction pair works for a period of time, the solid lubricant agent in the pits is transmitted between the pits, and therefore, the solid lubrication coating of the matrix surface is supplemented. The method is a novel surface coating preparing method, a surface lubrication state can be fully improved,and metal surface mechanical properties of the metal surface can be substantially improved simultaneously. The technology is simple and reliable, automatization production can be realized, and the preparing method is suitable for industrialization popularization.

Description

technical field [0001] The invention relates to the field of material surface treatment, in particular to a method for preparing a laser thermal-mechanical coupling textured solid lubricating coating, which mainly utilizes laser thermal effects and laser force effects to form a dense solid lubricating coating on the surface of a substrate to enhance surface mechanics properties and lubricating properties. Background technique [0002] With the continuous development of industrial technology, the service conditions of mechanical parts are becoming more and more severe, especially in aviation, deep sea and other fields. Bearings and other parts are in a state of no lubricating oil when they work, but the working conditions are extremely harsh, and friction is easy to occur Wear failure, so surface solid lubricant coating treatment is required. [0003] Laser surface micro-texturing technology (LST technology) is a surface topography processing technology that has developed mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08B23K26/00
CPCC23C24/08
Inventor 解玄华希俊尹必峰张培耘
Owner JIANGSU UNIV
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