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US 7,404,866 B2Granted
Sliding member and method for manufacture thereof
AssigneeKabushiki Kaisha Toyota Chuo Kenkyusho
InventorsKazuyuki Nakanishi, Hideo Tachikawa, Hiroyuki Mori, Tadashi Oshima
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Abstract
A sliding member includes a superficial portion forming a sliding surface. The superficial portion includes an oxygen-containing alloy containing at least one metallic element selected from the group consisting of molybdenum and tungsten in an amount of from 2 to 80% by weight; and oxygen in an amount of from 0.5 to 15% by weight. The sliding member sustains lubricating characteristics given to the sliding surface over a long period of time to maintain a low friction coefficient and durability.
Claims14
A sliding member comprising
- a base;
- a metallic oxygen-containing alloy on the base;
- and
- a lubricating film on the oxygen-containing alloy,
- wherein the oxygen-containing alloy consists of:
- at least one of iron, aluminum and copper;
- at least one metallic element selected from the group consisting of molybdenum and tungsten in an amount of from 15 to 80% by weight;
- oxygen in an amount of from 0.5 to 15% by weight;
- and
- optionally at least one added element selected from the group consisting of chromium, nickel, manganese, carbon, silicon, magnesium, zinc and tin,
- wherein the lubricating film comprises a disulfide of at least one of molybdenum and tungsten, and
- wherein the lubricating film is fastened firmly to the oxygen-containing alloy.
9 more elements
Dependencies are inferred from the claim text.