| 摘要 |
<p>In the present invention, when forming a lubricating coating film by coating a solid lubricant onto the surface of a piston skirt section, the solid lubricant (lubricating coating film) is strongly bonded to the surface of the skirt section. This internal combustion engine piston (10) is provided with: a plurality of dimples (19) provided in order to increase the surface area of the surface of the skirt section (12) of the piston (10), which is configured from aluminum or an aluminum alloy; a boehmite coating film (20) formed at the surface of the skirt section (12) to which the plurality of dimples (19) have been provided; and a lubricating coating film (18) that is provided to the surface of the boehmite coating film (20) and that is formed by coating a solid lubricant onto the surface of the boehmite coating film (20).</p> |
