Title:
A piston ring and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6139605
Kind Code:
B2
Abstract:
To provide a piston ring free from microwelding to a piston while exhibiting excellent wear resistance in side surfaces, for a long period of use in a high-temperature, high-pressure environment, and its production method, a nitride layer is formed on at least one of upper and lower side surfaces of the piston ring, and then subjected to a phosphate chemical conversion treatment, such that the nitride layer has at least one of granular and vermicular surface forms.
Inventors:
Yuji Shima
Application Number:
JP2015142692A
Publication Date:
May 31, 2017
Filing Date:
July 17, 2015
Export Citation:
Assignee:
Riken Co., Ltd.
International Classes:
F16J9/26; F02F5/00
Domestic Patent References:
| JP5078856A | ||||
| JP2015057516A |
Foreign References:
| WO2009069703A1 |
Attorney, Agent or Firm:
Takaishi Tachibana
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