Hybrid face coating for piston ring

Details Hybrid face coating for piston ring Hybrid face coating for piston ring

1995-06-02

1997-02-25

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

277235A, 277DIG6, 428212, 428182, 428179, 428336, 428469, 428698, F16J 926

Patent

active

056057415

ABSTRACT:
A base body of a piston ring has an electroplated chrome or gas nitrided sub-layer formed on its outer peripheral face. The sub-layer is face-lapped, roughened through grit blasting, and then oil lapped to remove the asperities. The resulting plateau-reservoir surface has a smooth plateau and a number of reservoirs. A metallic nitride face coating is applied to the sub-layer. The reservoirs provide additional surface area to promote the bonding between the metallic nitride and the sub-layer. The coating does not eliminate the reservoirs, however. Thus, the reservoirs provide the additional function of storing lubricating oil which may be used during piston ring operation to eliminated unwanted wear.

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Wang et al "The Morphology and Orientation of G-N films deposited by reactive ion plating" Thin Solid Films 185(1990) Mar., No. 2 pp. 219-230.
English Translation of Japanese Application No. 4-64.
English Translation of Japanese Application No. 64-41650.

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