PISTON RING WITH CHROMIUM NITRIDE COATING FOR INTERNAL COMBUSTION ENGINES
摘要
<p>The invention relates to a piston ring for internal combustion engines, the piston ring comprises a steel or cast iron base material with a coating of chromium nitride deposited by a physical vapor deposition process on a sliding surface of the piston ring, wherein the coating is composed of a columnar crystal structure of CrN with the following features: (a) an oxygen content in solid solution of 0.5 to 2.5 wt %; (b) a content of uniformly dispersed micro-pores of less than 10% in volume of the coating; and (c) an X-ray diffraction intensity ratio of (111) planes to (200) planes parallel to the surface in the range of 0.80 to 1.20.</p>
申请公布号
EP2162649(B1)
申请公布日期
2012.05.16
申请号
EP20070785824
申请日期
2007.06.16
申请人
MAHLE INTERNATIONAL GMBH;MAHLE METAL LEVE S.A.
发明人
ARAUJO, JULIANO, AVELAR;MARQUES, GISELA, ABLAS;SARABANDA, JOSE, VALENTIM, LIMA;BANFIELD, ROBERT, RICHARD