| 摘要 |
The invention relates to a method for producing a piston ring composed of cast iron or cast steel by producing a piston ring main body which, viewed over the circumference, is coated with at least one PVD layer of variable layer thickness in such a way that, in the region of the ring gap ends, the layer thickness is elevated in comparison with the remaining circumferential region of the main body, wherein the piston ring main body is worked in such a way that, in the non-motorised cold operating state, a radial pressure distribution in the piston ring main body is such that the ring gap ends exert almost no radial pressure over a defined circumferential angle, and the variable layer thickness of the PVD layer is set in such a way that, at a piston ring temperature above 150°C, the radial pressure distribution is nearly uniform over the entire ring circumference of the piston ring. |
