Metallic sliding member, piston for internal combustion engine, method of surface treating these, and apparatus therefor
First Claim
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1. A surface treatment method for a metallic sliding member to be used in a lubricating environment containing lubricating oil, the method comprising:
- colliding molybdenum disulfide particles entrained in compressed air of 0.5 MPa or more and at a speed of 100 m/sec or more;
against a surface of the metallic sliding member for driving and embedding the molybdenum disulfide particles within a depth of 20 μ
m from the surface of the metallic sliding member form a layer of solid molybdenum disulfide; and
, forming dimples comprising concave portions in the layer of the solid molybdenum disulfide, said dimples each having of a shape and size sufficient to hold the lubricating oil on the treated surface of the metallic sliding member.
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Abstract
A metallic sliding member which is improved in initial compatibility and significantly reduced in frictional resistance: and a process for producing the member. The process comprises causing fine particles of molybdenum disulfide to collide against the surface of a base to form a layer containing molybdenum disulfide, serving as a solid lubricant, as a surface layer having a depth not larger than 20 μm from the surface.
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Citations
8 Claims
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1. A surface treatment method for a metallic sliding member to be used in a lubricating environment containing lubricating oil, the method comprising:
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colliding molybdenum disulfide particles entrained in compressed air of 0.5 MPa or more and at a speed of 100 m/sec or more;
against a surface of the metallic sliding member for driving and embedding the molybdenum disulfide particles within a depth of 20 μ
m from the surface of the metallic sliding member form a layer of solid molybdenum disulfide; and
,forming dimples comprising concave portions in the layer of the solid molybdenum disulfide, said dimples each having of a shape and size sufficient to hold the lubricating oil on the treated surface of the metallic sliding member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification