摘要
以PVD方法在不锈钢渗氮活塞环基体上沉积了厚约 30μm的CrN涂层。采用 2种GF-3等级的全配方发动机油作为润滑剂,在SRV试验机上,对比了具有 /没有CrN涂层的不锈钢渗氮活塞环的摩擦学性能。试验结果表明,CrN涂层能使摩擦因数数较快的稳定且数值较低,同时活塞环及其对磨缸套的磨损量也大大降低,对磨缸套的磨损量减少了80%以上。SEM分析结果表明,由于CrN涂层具有较高的硬度和较低的表面粗糙度,可以降低磨粒磨损,且能使对磨的缸套试样较快地与之适配,从而促进了摩擦反应膜的形成和扩展,是摩擦因数和磨损量降低的主要原因。
Chromium nitrided coating was deposited on the stainless steel nitrided piston ring by PVD.The thickness of the film is about 30 μm.The tribological performances of piston rings with and without CrN coating,when lubricated with two kinds of GF-3 category full-formulated engine oils,were investigated on a SRV tribotester.The results indicate that the CrN coating can lead to a faster stabilization and lower values of friction coefficient.It also can greatly reduce the wear volume of both piston ring and cylinder bore.The wear volume of the encountering cylinder bore decreased more than 80%.The SEM analysis results explain that with the higher hardness and the lower surface roughness of the CrN coating,the abrasive wear could be prevented, the encountering cylinder bore could be mated with the piston ring much faster and the formation and development of the tribo-reaction film could be hastened,which is the main reason for the reduction of friction coefficients and wear volumes.
出处
《润滑与密封》
EI
CAS
CSCD
北大核心
2005年第2期59-62,66,共5页
Lubrication Engineering
