low friction sliding mechanism
A technology of sliding mechanism and sliding components, which is applied in the direction of mechanical equipment, lubricating composition, anti-centrifugal force rotating parts, etc. It can solve the problems of low friction characteristics and small friction reduction effect, and achieve excellent anti-occlusion effect
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Embodiment 1
[0080] The materials of the flat plate test piece and the pin test piece used in this example are as follows.
[0081] ·Plate test piece 1: Copper plate (thickness 7mm×length 60mm×width 40mm)
[0082] Surface roughness of sliding surface Ra 0.4μm
[0083] ・Pin test piece 1: DLC-coated kamaboko-shaped member (Japanese: (Kamaboko)) (curvature R300×30mm long)
[0084] Surface roughness of sliding surface Ra 0.03μm
[0085] Here, the DLC-coated kamaboko member used as the above-mentioned pin test piece 1 was formed by coating the sliding surface of chromium steel (SCr420) with a DLC film by PVD arc ion plating. It should be noted that the hydrogen content in the DLC film was 0.5 at%. In addition, as lubricating oil, MoDTC-containing oil (Mo content 700 mass ppm, SAE viscosity 0W20) was used.
[0086] Regarding the results of the reciprocating motion test, in Example 1, the frictional force of the sliding part did not exceed 130N until the stopper stopped by the load capacity o...
Embodiment 2
[0090] In Example 2, it carried out by the same reciprocating motion test method as Example 1 except having used MoDTP-containing oil instead of MoDTC-containing oil as lubricating oil. In Example 2, the frictional force of the sliding part did not exceed 130N until the limiter stopped due to the load capacity of the testing machine at 1900N.
[0091]
[0092] After the reciprocating test, the sliding portion of the pin test piece 2 was observed with a cross-sectional scanning electron microscope (SEM), and it was observed that a large number of independent spots were scattered on the surface of the DLC film. These spots were measured by elemental analysis by the combustion method, and as a result, it was confirmed that the copper film was mainly composed of copper. The dotted copper film occupies an area ratio of 8% in the DLC film serving as the sliding portion, and its thickness is 0.5 μm.
Embodiment 3
[0094] In Example 3, the same reciprocation test method as in Example 1 was performed except that MoDTC-containing oil (Mo content: 800 mass ppm) was used instead of MoDTC-containing oil (Mo content: 700 mass ppm) as lubricating oil. In Example 3, the limiter stopped when the load capacity of the testing machine reached 1900N, but the frictional force of the sliding part did not exceed 130N at this time.
[0095]
[0096] After the reciprocating test, the sliding portion of the pin test piece 3 was observed with a cross-sectional scanning electron microscope (SEM), and it was observed that a large number of independent spots were scattered on the surface of the DLC film. These spots were measured by elemental analysis by the combustion method, and as a result, it was confirmed that the copper film was mainly composed of copper. In addition, the dotted copper film occupies 5% of the area ratio of the DLC film which is a sliding part, and its thickness is 0.3 micrometers.
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Abstract
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