Title:
PISTON RING AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2015/064538
Kind Code:
A1
Abstract:
In the present invention, in order to provide a piston ring covered with an amorphous hard carbon film that has low friction characteristics and outstanding abrasion resistance and film peeling resistance in order to achieve lower fuel consumption in an automobile, the outer peripheral surface of a steel piston ring base material is covered with a non-crystalline hard carbon film with a thickness of 0.4-20 µm, with the following interposed therebetween: a base layer that comprises a CrN/Cr layered film or CrN/TiN layered film with a thickness of 10-60 µm, in which CrN-type chromium nitride and chromium metal or TiN-type titanium nitride are layered alternately; and an intermediate layer that comprises chromium metal and/or titanium metal and has a thickness of 0.05-1.0 µm.
Inventors:
SATO MASAYUKI (JP)
MURAYAMA YUUICHI (JP)
IWAMOTO YOUHEI (JP)
SEKIYA TAKUMA (JP)
MURAYAMA YUUICHI (JP)
IWAMOTO YOUHEI (JP)
SEKIYA TAKUMA (JP)
Application Number:
PCT/JP2014/078496
Publication Date:
May 07, 2015
Filing Date:
October 27, 2014
Export Citation:
Assignee:
RIKEN KK (JP)
International Classes:
F16J9/26; C23C14/06; C23C14/14; F02F5/00
Foreign References:
| JPH11335813A | 1999-12-07 | |||
| JP4839120B2 | 2011-12-21 | |||
| JP2010506082A | 2010-02-25 | |||
| JP2005060810A | 2005-03-10 | |||
| JP2013091853A | 2013-05-16 | |||
| JPH11172413A | 1999-06-29 | |||
| JP2001316800A | 2001-11-16 | |||
| JP2006250348A | 2006-09-21 | |||
| JP2007169698A | 2007-07-05 | |||
| JP2008025728A | 2008-02-07 | |||
| JP2013091853A | 2013-05-16 |
Other References:
See also references of EP 3064810A4
A. C. FERRARI ET AL., MAT. RES. SOC. SYMP. PROC., vol. 593, 2000, pages 311 - 316
ICHIMURA ET AL., SURFACE TECHNOLOGY, vol. 52, no. 1, 2001, pages 110 - 115
J. ROBERTSON, MATER. SCI. ENG., vol. R 37, 2002, pages 129 - 281
SURFACE TECHNOLOGY, vol. 41, no. 5, 1990, pages 462 - 470
A. C. FERRARI ET AL., MAT. RES. SOC. SYMP. PROC., vol. 593, 2000, pages 311 - 316
ICHIMURA ET AL., SURFACE TECHNOLOGY, vol. 52, no. 1, 2001, pages 110 - 115
J. ROBERTSON, MATER. SCI. ENG., vol. R 37, 2002, pages 129 - 281
SURFACE TECHNOLOGY, vol. 41, no. 5, 1990, pages 462 - 470
Attorney, Agent or Firm:
TAKAISHI Kitsuma (JP)
Kitsuma Takaishi (JP)
Kitsuma Takaishi (JP)
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