摘要
为了提高汽油机活塞环槽表面的抗磨损性能,在活塞环槽表面使用等离子体电解沉积法制备一种新型的氧化钛涂层,使用扫描电子显微镜、透射电子显微镜、粗糙度仪等检测设备对氧化钛涂层表面、截面及涂层结合处的微观形貌进行了分析,并将活塞装机进行了发动机台架试验,测量了试验后环槽的磨损情况。结果表明:氧化钛涂层活塞环槽表面成膜率达到85%以上,环槽表面的微观硬度及粗糙度较传统的阳极氧化铝涂层都有了明显提高,其显微硬度达到706.0 HV左右,表面粗糙度约为Ra 0.854μm,氧化钛涂层活塞试验前后槽宽的变化量和每缸的磨损量均小于阳极氧化铝涂层,显著改善了活塞环槽磨损情况。此研究为提高汽油机活塞环槽表面质量、改善活塞环槽在运行中的磨损提供了参考。
In order to improve the wear resistance of the gasoline piston ring groove,a new TiO2 coating was prepared on the surface of the piston ring groove by phasma electrolytic deposition. Micro-morphologies of surface,cross section and joints of the TiO2 coating were analyzed by the scanning electron microscope,the transmission electron microscopy and the roughness measuring machine. The wear properties of the piston ring groove were also measured after the engine bench test. Results showed that the film-forming ratio of the piston ring groove with the TiO2 coating could reach above 85%. The microhardness and roughness of the ring groove were improved obviously,with the surface roughness Ra of about 0.854 μm and the microhardness of about 706.0 HV. The ring groove width variation and wear loss of the TiO2 coating were less than those of the anodized coating. This research provided a reference for improving surface quality and wear of the gasoline piston ring groove.
作者
梁源昌
徐岩琨
文可
LIANG Yuan-chang;XU Yan-kun;WEN Ke(School of Navigation,Wuhan University of Technology,Wuhan 430063,China)
出处
《材料保护》
CAS
CSCD
北大核心
2020年第7期110-113,120,共5页
Materials Protection
基金
国家级大学生创新创业训练计划项目(20191049712004)资助。
关键词
汽油机活塞
环槽
涂层
等离子体电解沉积法
磨损
gasoline engine piston
ring groove
coating
plasma electrolytic deposition
wear