| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an internal combustion engine component having a sliding surface excellent in retaining capability of lubricating oil, and its manufacturing method. <P>SOLUTION: An internal combustion engine component is composed of an aluminum alloy containing silicon, and includes a plurality of silicon crystal grains 1, 2 on a sliding surface 101. The sliding surface 101 has a ten point-average roughness Rz<SB POS="POST">JIS</SB>of 0.54 μm or higher, and a load length ratio Rmr (30) at a cut level of 30% of the sliding surface 101 is 20% or more. The plurality of silicon crystal grains 1, 2 include a plurality of primary crystal silicon grains 1 and a plurality of eutectic silicon grains 2. The plurality of primary crystal silicon grains 1 and the plurality of eutectic silicon grains 2 protrude from a matrix 3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
