摘要
为解决铝合金发动机缸体耐磨性差的问题,采用等离子喷涂技术在铝合金表面制备了不同Mo含量的铁基涂层(XPT-512-Mo),研究了Mo元素对涂层组织结构及摩擦磨损性能的影响。结果表明:XPT-512-Mo铁基涂层主要由铁素体(F)和Mo相组成,其截面形貌呈现典型的热喷涂层状结构。摩擦磨损性能表明:在干摩擦/油润滑工况下,随着金属Mo的加入,XPT-512-Mo系涂层的磨损率均有所降低,尤其以低Mo含量的XPT-512-30Mo涂层的摩擦磨损性能最为优异,其原因在于涂层磨损表面形成了MoO_(3)和Fe_(3)O_(4)的复合氧化物膜层,促进了氧化物的协同润滑作用,发挥了显著的润滑及减摩作用。
In order to solve the problem of poor wear resistance of aluminum alloy engine body,iron-based coating(XPT-512-Mo)with different Mo content was prepared on the surface of aluminum alloy by plasma spraying technology.The effects of Mo element on the microstructure and tribological properties of coating were studied.The results show that XPT-512-Mo iron-based coating is mainly composed of ferrite(F)and Mo phase and its cross-section morphology presents a typical thermal spraying coating structure.The tribological properties indicate that the wear rate of XPT-512-Mo coating decreases with the addition of metal Mo under dry friction or oil lubrication condition.The coating with low Mo content like XPT-512-30Mo hence has the optimal wear performance.The composite oxide film of MoO_(3)and Fe_(3)O_(4)has formed on the worn surface of coating,which acts as the role of collaborative lubrication and plays a significant role in lubrication and antifriction.
作者
张海瑜
王芙蓉
王志东
杜双明
刘二勇
ZHANG Haiyu;WANG Furong;WANG Zhidong;DU Shuangming;LIU Eryong(Xi an University of Science and Technology,Xi'an 710054,China;Xi an Reshipment Tongchuan Coal Mine Machinery Co.,Ltd.,Tongchuan 727000,China;Material Supply Department of PetroChina Changqing Oilfield Company,Xi'an 710016,China)
出处
《车用发动机》
北大核心
2021年第4期57-63,共7页
Vehicle Engine
基金
国家自然科学基金(51705415)
中科院海洋新材料与应用技术重点实验室开放课题(2018K01)
陕西省重点研发计划项(2020GY-115)。
关键词
等离子喷涂
铁基涂层
摩擦
磨损
协同润滑
plasma spraying
iron-based coating
friction
wear
collaborative lubrication
