摘要
针对铝合金缸体内壁油性腐蚀环境中的摩擦工况,采用大气等离子喷涂制得了高铬铸铁涂层和316L不锈钢涂层,采用维氏显微硬度计、图像分析软件、台式扫描电子显微镜及热场发射扫描电子显微镜分别对显微硬度、孔隙率、涂层厚度及结构进行了测试和分析。采用球-盘式往复摩擦试验机对比研究了两种涂层与典型缸套材料HT200灰铸铁在大气环境、纯发动机油润滑环境和模拟发动机腐蚀性油润滑环境下的摩擦学性能。结果表明:高铬铸铁涂层在腐蚀性发动机油环境中表现出好的摩擦磨损性能。
High-chromium cast iron （HCCI） and 316L stainless steel （316LSS） coatings were developed by atmosphere plasma spraying to overcome the working conditions of high temperature and friction in the oily corrosive environment that happens in the aluminium alloy engine cylinder. Mierohardness, porosity, thickness and microstructure of the coatings were tested and analyzed by digital vickers microhardness tester, image a nalysis software, desktop scanning electron microscope, and thermal field emission scanning electron micro scope, respectively. Comparative experiment was conducted to investigate the tribology performance of the two coatings and HT200 grey cast iron that was a typical cylinder material under air, pure engine oil, and simula tive corrosive engine oil conditions. The results show that the high-chromium cast iron coating has optimal tri bology properties under corrosive condition.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2013年第5期77-82,共6页
China Surface Engineering
基金
国家自然科学基金(51202260)
宁波市自然科学基金(2012A610105)
关键词
铝合金
缸体
油性腐蚀
高铬铸铁
等离子喷涂
摩擦学性能
aluminium alloy
engine cylinder
oily corrosion
high-chromium cast iron
plasma spraying
tribological properties
