DLC-coated sliding member and method for producing the same
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United States of America Patent
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Aug 27, 2013
Grant Date -
Feb 24, 2011
app pub date -
Feb 3, 2009
filing date -
Feb 6, 2008
priority date (Note) -
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Abstract
A sliding member is produced by forming hardening layers with two-layered structure on surface of a substrate metal with a Vickers hardness of not more than Hv300, such as aluminum or magnesium alloy for example, and then forming a DLC film having surface roughness defined as maximum height roughness Rz of 1 to 10 μm further on the hardening layers. The above-described hardening layers are composed of a first hardening layer dispersed with heavy metal particles, preferably made of tungsten and/or tantalum in the substrate metal, and a second hardening layer formed under the first hardening layer.
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