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Metallic sliding member, piston for internal combustion engine, method of surface treating these, and apparatus therefor

  • US 6,863,922 B2
  • Filed: 11/16/2001
  • Issued: 03/08/2005
  • Est. Priority Date: 11/16/2000
  • Status: Expired due to Term
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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