Title:
シリンダとピストンリングの組合せ
Document Type and Number:
Japanese Patent JP5564099
Kind Code:
B2
Abstract:
To provide a combination of a cylinder made of a hypereutectic Al-Si alloy and a hard-carbon-coated piston ring both exhibiting excellent wear resistance, the piston ring is provided with a laminate coating at least on an outer peripheral sliding surface thereof; the laminate coating comprising a metal layer, a metal-containing, hard carbon layer, and a metal-free, hard carbon layer in this order from the substrate side; the laminate coating having Martens' hardness (indentation hardness) HMs of 5-13 GPa, indentation modulus E of 70-200 GPa, and a deformation ratio Rpe of 0.45 or less, which is expressed by a ratio (Wp/We) of plastic deformation energy Wp to elastic deformation energy We; and a ratio (Tmf/Tm) of the thickness Tmf of the metal-free, hard carbon layer to the thickness Tm of the metal-containing, hard carbon layer being 2-8.
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Inventors:
Akira Kunimoto
Masaki Moronuki
Masaki Moronuki
Application Number:
JP2012286718A
Publication Date:
July 30, 2014
Filing Date:
December 28, 2012
Export Citation:
Assignee:
Riken Co., Ltd.
International Classes:
F16J9/26; C23C14/06; C23C16/27; F02F5/00; F16J10/00
Domestic Patent References:
| JP201175065A | ||||
| JP2013501897A | ||||
| JP2007170467A | ||||
| JP2007513856A | ||||
| JP2011519394A | ||||
| JP2013529249A |
Foreign References:
| WO2011051008A1 | ||||
| WO2012100847A1 | ||||
| WO2012072483A1 | ||||
| WO2012116818A1 | ||||
| US7160616 | ||||
| US8123227 |
Attorney, Agent or Firm:
Takaishi Tachibana