Title:
PISTON RING AND SEAL RING FOR TURBOCHARGER
Document Type and Number:
WIPO Patent Application WO/2015/052761
Kind Code:
A1
Abstract:
Provided are a piston ring and a seal ring for a turbocharger that are provided with a hard covering film having superior cracking and peeling resistance. In the piston ring and the seal ring for a turbo charger, which are such that at least one surface selected from the outer peripheral surface, a first lateral surface, and a second lateral surface of a substrate is covered by a hard covering film, the hard covering film has an NaCl-type crystal structure, contains at least Ti, Al, and N, has a composition in which the atom ratio (Al/(Ti+Al)) of Al to Ti and Al is in the range of 0.10-0.63, has a void area ratio in a cross section of the hard covering film that is no greater than 2.2%, and has a ratio (I200/I111) of the diffraction peak strength in the (200) plane with respect to the diffraction peak strength in the (111) plane in an X-ray diffraction measurement of the hard covering film that is greater than 1 and no greater than 15.
Inventors:
KAWAI KIYOYUKI (JP)
TANAKA SHOJI (JP)
OHIRA MASAYUKI (JP)
TANAKA SHOJI (JP)
OHIRA MASAYUKI (JP)
Application Number:
PCT/JP2013/077293
Publication Date:
April 16, 2015
Filing Date:
October 08, 2013
Export Citation:
Assignee:
TPR CO LTD (JP)
International Classes:
F16J9/26
Foreign References:
| JPH05141534A | 1993-06-08 | |||
| JP3599628B2 | 2004-12-08 | |||
| JP2644710B2 | 1997-08-25 | |||
| JP2008307615A | 2008-12-25 | |||
| JP2009090452A | 2009-04-30 | |||
| JP2005535836A | 2005-11-24 |
Attorney, Agent or Firm:
IAT WORLD PATENT LAW FIRM (JP)
Eye アット international patent business corporation (JP)
Eye アット international patent business corporation (JP)
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