发明名称 |
METHOD FOR COATING PISTON RINGS FOR INTERNAL COMBUSTION ENGINES |
摘要 |
The invention relates to a method for coating piston rings (10) for internal combustion engines, wherein at least the bearing surface of the piston ring is provided with an anti-abrasion and anti-corrosion coating (12) by means of a PVD or electroplating process. According to said method, the anti-abrasion and anti-corrosion coating is prevented from flaking or cracking caused by strain occurring on the piston ring during the operation of the motor by means of the following steps: a) coating parameters are set; b) an uncoated piston ring (18) is pre-stressed in order to obtain a predetermined diameter (06) thereof or opening width (10); an ion coating process is carried out using coating parameters according to step a); the internal stress of the anti-abrasion or anti-corrosion coating (12) is measured in state (b); e) a new, uncoated piston ring (10) is subjected to tensile pre-stressing or compressive strain according to the measured internal tension of the coating; and f) the piston ring is coated (10) according to the coating parameters according to step a). |
申请公布号 |
WO2004050937(A2) |
申请公布日期 |
2004.06.17 |
申请号 |
WO2003DE03930 |
申请日期 |
2003.11.27 |
申请人 |
MAHLE GMBH;ISSLER, WOLFGANG |
发明人 |
ISSLER, WOLFGANG |
分类号 |
C23C14/06;C23C14/22;C25D5/00;C25D7/00;H03G3/30 |
主分类号 |
C23C14/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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