【作者】

Akihiro Kose

【摘要】

该论文已在赫尔辛基举行的第28届CIMAC大会上发表，论文的版权归CIMAC所有。ABSTRACT With increased awareness of environmental issues and regulations, developments for middle and high speed engines are progressing towards engines with low fuel consumption and low harmful substances such as NOx in the exhaust gas. As one of the methods to solve a problem, these engines have improved the combustion efficiency by increasing the internal cylinder pressure. Due to this improvement, middle and high speed engine bearings are required high-temperature strength by higher load and higher temperature around shaft. On the other hand, bearing alloy is requiring conformability and corrosion resistance, it becomes necessary to develop a bearing alloy having higher strength without losing conformability and corrosion resistance. Conventionally, Al-Sn-Si alloy bearing have been used in these engines. This material has both strength and conformability, its properties are contradictory. And Al-Sn-Si alloy also has corrosion resistance. Sn phase disperse in the aluminum alloy matrix, it gives not only conformability but also good sliding properties to bearing alloy. Si particles disperse same as Sn, it prevent to seizure between bearing alloy and shaft to scrape off aluminum alloy attached on the shaft. About aluminum matrix, bearing strength depends on aluminum matrix strength and its strong oxide layer prevents corrosion.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

2

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