| 摘要 |
The invention relates, in a general manner, to a component of an internal combustion engine and, more specifically, the invention is related to a piston ring of an internal combustion engine. The invention furthermore relates to an internal combustion engine containing such ring. According to an embodiment of the invention, the piston ring comprises between 8 and 15% by weight of chromium, in addition to other elements and inevitable impurities, having a hardness comprised between 350 and 420 HV, wherein the said ring comprises a superficial nitrided layer having a depth less than or equal to 60 ym and having an average hardness measured upon the surface exceeding 800 HV, wherein the nitride particles of the nitrided layer possess a maximum size of 5 μm and are distributed over between 4 and 8% of the area of the nitrided layer, the white layer being absent in the nitrided layer. |
