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Laser micro-texturing self-lubricating treatment method for friction pairs

A treatment method and friction pair technology, applied in the field of friction pair self-lubrication, can solve problems such as increasing process difficulty and cost, affecting lubrication effect, and limiting machining accuracy

Inactive Publication Date: 2013-09-25
JIANGSU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The whole layer coating and sintering method is adopted, and the thickness of the lubricating coating reaches 0.5-2.5 mm, which affects the matching accuracy and support rigidity of the bearing.
The patent application number 200810235590.0 published in 2009 discloses a three-layer self-lubricating sliding bearing structure. Due to the addition of a porous copper powder sintered layer, the difficulty and cost of the process are greatly improved, and the improvement of machining accuracy is also limited.
This patent uses laser micromachining small holes to form silver diffusion channels, but there is no pre-embedded lubricant in the channels, which will affect the lubrication effect
The patent application number 200910033454.8 published in 2009 proposed a laser surface bionic structure and impact strengthening method, but did not involve surface self-lubricating treatment
The above-mentioned published patent documents have no record on the secondary hot pressing molding method of embedding the solid lubricating material on the micro-modelling surface of the friction pair

Method used

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  • Laser micro-texturing self-lubricating treatment method for friction pairs
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  • Laser micro-texturing self-lubricating treatment method for friction pairs

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with specific examples.

[0024] The laser texturing equipment adopts diode-pumped Nd:YAG laser processing system, the laser wavelength is 532nm, the current is 16-17A, the frequency is 1600Hz, the number of pulses is 8-9 times, nitrogen is used as the auxiliary gas, and the gas pressure is 0.15Mpa. After GCr15 steel was textured, the surface of the sample was polished with metallographic sandpaper until the slag around the micro pits disappeared, and the measured surface hardness was still about 62-64HRC. Using the WYKO-NT1100 three-dimensional measuring instrument for surface micro-geometric topography produced by Veeco, the diameter of a single micro-pit in the sample is measured to be about 110 μm, and the depth is about 18 μm.

[0025] Weigh the polyimide and molybdenum disulfide according to the mass ratio of 1:4, then fully mix them at room temperature, spread them evenly on the surface of the s...

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Abstract

The invention discloses a laser micro-texturing self-lubricating treatment method for friction pairs, which relates to a friction pair self-lubricating technology. According to the invention, the surface of a friction pair is subjected to laser micro-texturing treatment, the diameter of a micro pit is 45-130 microns, the depth of the micro pit is 10-80 microns, the area-occupied rate of the micro pit is 20-38%, the distance between the micro pits is 110-300 microns, and a self-lubricating composite material is embedded in the surface of the friction pair by using a secondary thermal pressurizing method, so that the surface friction coefficient of the obtained friction pair is low, thereby reducing friction and abrasion and improving the antifriction and wear-resistance combination properties of the friction pair.

Description

technical field [0001] The invention relates to a friction pair self-lubricating technology, in particular to a laser micro-modeling self-lubricating treatment method for a friction pair, which is used to solve the self-lubrication problem of the friction pair. Background technique [0002] At present, in the fields of aerospace, metal processing and forming, engineering machinery, rolling stock, water (wind) power generation and nuclear industry, there is a great demand for new self-lubricating technology of friction pairs. Solid self-lubrication breaks through the limit of oil film lubrication, and has become an important development direction of lubrication technology. Therefore, it is particularly urgent and important to research and develop self-lubricating technology that meets the requirements of various complex and special working conditions. [0003] The patent application No. 98122341.9 disclosed in 1999 was drilled or grooved on the metal substrate and embedded w...

Claims

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Application Information

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IPC IPC(8): F16C33/02F16C33/66B23K26/36
Inventor 张培耘华希俊符永宏王浩刘明刘凯王蓉
Owner JIANGSU UNIV
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