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Title:
PISTON RING
Document Type and Number:
Japanese Patent JPS6198949
Kind Code:
A
Abstract:

PURPOSE: To obtain a piston ring having sufficient wearing resistance and seizure resistance or the like even under a condition of the piston ring in severe use, by forming a coating layer of amorphous material, being composed of chrome and nitrogen, on at least one sliding surface.

CONSTITUTION: In a piston ring 1 used in a reciprocating internal-combustion engine, at least one sliding surface of the basic material 2 forms a coating layer 3 of amorphous material being composed of chrome and nitrogen. Here the coating layer 3, utilizing, for instance, the PVD method preferably the reactive ion plating method evaporating metallic chrome to be deposited in an atmosphere of pressure reduced nitrogen gas, is formed in an evaporation process of the metallic chrome as the amorphous material being composed of the metallic chrome and the nitrogen. In this way, the piston ring, enabling its sliding surface to improve corrosion resistance, seizure resistance and wearing resistance, can be applied for the internal-combustion engine using the piston ring under a severe condition of operation.


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Inventors:
TAKIGUCHI KATSUMI
Application Number:
JP1984000218588
Publication Date:
May 17, 1986
Filing Date:
October 19, 1984
Export Citation:
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Assignee:
RIKEN KK
International Classes:
F02F5/00; F16J9/26; (IPC1-7): F02F5/00
Domestic Patent References:
JPS4732846A
JPS59127858U1984-08-28