Preparation method of textured diamond-like carbon composite film for water lubrication

A composite film and texturing technology, which is applied in metal material coating process, ion implantation plating, coating, etc., to achieve long service life and reliability, reduce friction coefficient, improve stability and anti-friction and anti-wear performance Effect

Active Publication Date: 2010-06-23
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Embodiment 1

[0020] For the preparation of pit-type textured diamond-like composite films, the processed samples are stainless steel sheets, Ti6Al4V titanium alloy sheets and SiC ceramic sheets with a size of 30mm×50mm. Follow the steps below in order:

[0021] (1) Micro-modeling of laser surface pits: firstly, the sample is pretreated by polishing, degreasing and cleaning, and then the Nd-YAG solid-state laser (wavelength 1064nm, pulse width about 4ns) is used to adjust the laser energy (the total energy of the laser is 3W) ), the laser pulse frequency is controlled at 10KHz, the number of pulses is 4 times, the scanning rate is 5mm / s, and the spot diameter is 20μm, and a pit-type texture is processed on the surface of the sample. Finally, the diameter of the pits on the stainless steel surface was 50 μm, the depth was 1 μm, and the distance between centers was 60 μm; the diameter of the pits on the titanium alloy surface was 40 μm, and the depth was 8 μm; the diameter of the pits on the ...

Embodiment 2

[0024] The preparation of striped textured diamond-like composite film, the processing samples are stainless steel sheet, Ti6Al4V titanium alloy sheet and SiC ceramic sheet with the size of 30mm×50mm. Follow the steps below in order:

[0025] (1) Micro-modeling of laser surface stripes: firstly, the sample is pretreated by polishing, degreasing and cleaning, and then a Nd-YAG solid-state laser (wavelength 1064nm, pulse width about 4ns) is used to adjust the laser energy (the total energy of the laser is 3W) , the laser pulse frequency is controlled at 10KHz, the number of pulses is 1, the scanning rate is 3mm / s, the spot diameter is 20μm, and the stripe texture is processed on the surface of the sample. Finally, the stripe width obtained on the stainless steel surface is 40 μm, the depth is 2 μm, and the center spacing is 80 μm; the stripe width obtained on the titanium alloy surface is 30 μm, and the depth is 3-4 μm; the stripe width obtained on the SiC ceramic surface is 50 ...

Embodiment 3

[0028] For the preparation of orthogonal grid textured diamond-like carbon composite film, the processed sample is a stainless steel sheet with a size of 30mm×50mm. Follow the steps below in order:

[0029] (1) Orthogonal grid micromodeling of the laser surface: firstly, the sample is pretreated by polishing, degreasing and cleaning, and then a Nd:YAG solid-state laser (wavelength 1064nm, pulse width about 4ns) is used to adjust the laser energy (total laser energy 3W), the laser pulse frequency is controlled at 10KHz, the number of pulses is 1, the scanning rate is 5mm / s, the spot diameter is 20μm, and the orthogonal grid texture is processed on the surface of the sample, and the texture unit is 120μm. Orthogonal grid composed of horizontal stripes and vertical stripes with a pitch of 120 μm. After the laser processing, the conventional cleaning method is carried out. .

[0030](2) Deposition of textured titanium-doped diamond-like carbon film by magnetron sputtering: fix ...

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Abstract

The invention discloses a preparation method of a textured diamond-like carbon composite film for water lubrication. In the invention, by adopting a laser surface micro-processing technology, a microtexture appearance molding can be obtained on the surface of a workpiece, and a film can be obtained on the surface of the workpiece by plating a titanium transition layer and doping a diamond-like carbon film of titanium after the workpiece is plasma-cleaned by a magnetic control sputtering deposition technology. The film greatly enhances the stability and the antifriction and abrasion resistance performance of the conventional diamond-like carbon film under the condition of water lubrication with the friction coefficient reduction reaching up to 40 percent and the abrasion resistance enhanced by 1-3 times. The invention is suitable for surface protection and strengthening of a transmission friction pair of a mechanical sealing ring, a thrust bearing and other machines under the water-consuming environment, and the service life is prolonged.

Description

technical field [0001] The invention relates to a preparation method of a textured diamond-like composite film for water lubrication. Background technique [0002] Various ships, warships, underwater weapons, nuclear power water cooling systems, water pumps, water lubricated bearings of water turbines, dynamic seals and other transmission friction pairs will involve water lubrication problems. Water lubrication has the characteristics of no pollution, low cost of use, and easy maintenance, and has become the most promising lubricating medium. However, due to the disadvantages of low viscosity, strong cavitation, and poor lubricity of water, and the problems of easy corrosion and large wear of water-lubricated friction pairs, its application range is largely limited. Therefore, seeking friction pair materials with good wear resistance and corrosion resistance under water lubrication conditions has become one of the key issues in the development of water lubrication technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/06C23C14/02C23C14/54
Inventor 王立平胡丽天丁奇张广安薛群基
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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