Title:
ピストンリングおよびその製造方法
Document Type and Number:
Japanese Patent JP6578491
Kind Code:
B2
Abstract:
Provided is a piston ring having excellent low-friction properties and abrasion resistance manufactured without the need for precision control using an ordinary film formation device that does not have a special function. A piston ring obtained by coating an amorphous carbon film on the surface of a ring-shaped substrate, the piston ring being configured so that the amorphous carbon film is formed by CVD, an increase region, in which the ratio sp2/sp3 of the sp2 bond to the sp3 bond continuously increases from the substrate surface toward the film surface, and a decrease region, in which the ratio sp2/sp3 continuously decreases, are formed in alternating fashion, a soft film in which the ratio sp2/sp3 is low and a hard film in which the ratio sp2/sp3 is high are formed so as to be layered in alternating fashion by continuous variation of the ratio sp2/sp3 in the boundary between the increase region and the decrease region, and the decrease regions are formed in equal number to or with one region less than the number of increase regions.
Inventors:
Takehiko Oshiro
Koji Miyake
Masanori Tsujioka
Satoshi Yoshida
Koji Miyake
Masanori Tsujioka
Satoshi Yoshida
Application Number:
JP2017534065A
Publication Date:
September 25, 2019
Filing Date:
August 10, 2015
Export Citation:
Assignee:
Japan ITF Co., Ltd.
Honda motor industry stock company
Honda motor industry stock company
International Classes:
F16J9/26; C23C16/26; F02F5/00
Domestic Patent References:
| JP2012527583A | ||||
| JP2012527581A | ||||
| JP2012202522A | ||||
| JP2008286354A |
Foreign References:
| WO2015115601A1 | ||||
| WO2015045745A1 | ||||
| WO2014133095A1 | ||||
| WO2014068040A1 |
Attorney, Agent or Firm:
Tetsuji Kamidai
Naomi Kamino
Satoshi Shimizu
Naomi Kamino
Satoshi Shimizu