Piston ring with hard chromium layer and improved running-in behaviour

A piston ring, comprising:

• a base body having an inner circumferential surface, a first flank surface, a second flank surface and an outer circumferential surface and a first hard chromium layer with a crack network is to the outer circumferential surface, wherein the crack network of the first hard chromium layer has a crack density of 10-250 cracks per mm and solid particles having an average particle size of 0.01-10 μm are embedded in the cracks of the first hard chromium layer, a second hard chromium layer having a crack network is applied on the first hard chromium layer, the crack density of the crack network of the second hard chromium layer being 10-250 cracks per mm, wherein no solid particles are embedded in the cracks of the second hard chromium layer, the cracks on the surface of the second hard chromium layer have an average width of 1-15 μm, the cracks on the surface of the second hard chromium layer are electrolytically expanded and the surface proportion of the cracks on the surface of the second hard chromium layer is 3-25%, based on a total surface of the second hard chromium layer.