TRIBOLOGICAL PROPERTIES OF PISTON RINGS DESIGNED FOR SLIDING AGAINST COMPOSITE MATERIALS IN LUBRICATED CONTACTS
参考中译:润滑接触条件下复合材料滑动活塞环的摩擦学性能


          

刊名：Tribologia
作者：Andrzej POSMYK（Silesian University of Transport and Aviation Engineering）
刊号：780LH007
ISSN：0208-7774
出版年：2023
年卷期：2023, no.3
页码：53-61
总页数：9
分类号：TH117
关键词：Means of transport；Piston rings；Composite materials；Ceramic particles；Chromium coating
参考中译：运输工具；活塞环；复合材料；陶瓷颗粒；铬涂层
语种：eng
文摘：The paper presents basic information on the production, structure and tribological properties of a composite chromium-ceramic coating deposited electrolytically on a cast-iron piston ring for a combustion engine designed for sliding against a composite cylinder liner. The results of comparative tests of two contacts, i.e. cast-iron GJL-250/AlMC and GJL250+Cr-Al_2O_3/AlMC, are described. The deposition of the Cr-Al_2O_3 coating on the cast-iron piston ring reduces almost trifold the wear of the piston ring and about 20% the friction resistance in the contact due to the presence of aluminium oxide particles and fibres. The reinforcing phase removed from the chromium layer polishes the chromium and composite sliding surfaces. The places left by the removed particles serve as depots for oil, which reduces the friction forces and minimises oil consumption. The Al_2O_3 wear debris decreases the roughness of the surfaces in contact, which additionally reduces the friction forces according to the friction hypothesis of Ernst and Merchant.
参考中译：本文介绍了用于内燃机滑动复合气缸套的铸铁活塞环上电解沉积铬-陶瓷复合涂层的生产、结构和摩擦学性能的基本情况。介绍了GJL-250/AlMC和GJL250+Cr-Al_2O_3/AlMC两种触头的对比试验结果。在铸铁活塞环上沉积Cr-Al_2O_3涂层，由于氧化铝颗粒和纤维的存在，活塞环的磨损减少了近三倍，接触摩擦阻力降低了约20%。从铬层中去除的强化相抛光了铬和复合材料的滑动表面。被去除的颗粒留下的地方作为油库，减少了摩擦力，最大限度地减少了机油消耗。根据Ernst和Merchant的摩擦假说，Al_2O_3磨屑降低了接触表面的粗糙度，从而进一步降低了摩擦力。



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