PISTON RING WITH A MULTILAYER ASSEMBLY, AND A METHOD FOR THE PRODUCTION THEREOF

摘要

The present invention relates to a piston ring with improved running-in and wear properties and to a method for the production thereof. According to a first embodiment, the piston ring comprises a torus(2), a layer of coupling agent (4) of a nickel alloy which is applied on the bearing surface of the torus (2) by thermal spraying, an anti-abrasive layer (6) of a molybdenum alloy with CrC, WC, and MoC which is applied by thermal spraying on the layer of coupling agent (4), and a running-in layer (8) which is applied on the anti-abrasion layer (6) by thermal spraying and which comprises an AlCu alloy or a nickel-graphite alloy. According to a second embodiment, the piston ring comprises a torus, an anti-abrasion layer which is applied on the bearing surface of the torus, and a running-in layer which is applied on the anti-abrasion layer and which comprises nickel graphite.