FIELD: process engineering.
SUBSTANCE: set of inventions relates to production of piston rings whereat metal body has radially outer working surface, radially inner peripheral surface and top and bottom side surfaces extending there between. Zone shaped approximately to cylindrical surface is provided with definite taper. At least working surface is covered with one wear-resistant ply. Section making the scraping edge of at least one wear-proof ply is at least partially removed, mainly, in cylindrical manner to make a preset width web. Cover PVD-ply is applied on working surface. Note here that the available cover PVD-ply is removed up to the main material of working surface to make the web.
EFFECT: higher reliability of piston ring.
8 cl, 3 dwg
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