FIELD: machine building.
SUBSTANCE: invention relates to piston ring and method of its production. On outer surface of piston ring housing at least on working surface there is a diamond-like carbon coating as functional coating. Protective layer is applied on the functional coating on at least some sections of the working surface of the piston ring. Protective layer consists of material which differs from material of functional coating and has higher heat resistance than material of functional coating. Protective layer has the shape of surface inclusions arranged in depressions of functional coating.
EFFECT: method includes manufacturing of housing of piston ring, application of diamond-like carbon coating as functional coating at least on working surface of housing of piston ring, application of protective layer on functional coating, partial removal of protective layer with provision of inclusions only in depressions of surface of functional coating.
18 cl
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