摘要
为了研究车用发动机铝合金活塞表面强化处理效果,以ZL109材料为基体,采用等离子喷涂技术制备镍基合金涂层,并对涂层宏微观形貌、显微硬度、结合强度和孔隙率等基本特性进行了系统表征。在此基础上,模拟活塞工作载荷和频率,开展了实验室条件下常温干摩擦试验,考核涂层摩擦学性能。结果表明:铝合金材质车用发动机活塞采用等离子喷涂制备的镍基合金涂层试验中,涂层内部结构致密,力学性能优异,显微硬度为838.10 HV_(0.1),结合强度为12.27 MPa,截面孔隙率为3.82%;常温干摩擦条件下,涂层磨损失重小于铝合金磨损失重,仅为3.2 mg。因此,采用等离子喷涂制备镍基合金涂层可显著提升铝合金活塞的抗磨损性能。
In order to study the surface strengthening treatment effect on aluminum alloy piston of automobile en-gine,Ni-based alloy coating is prepared by plasma spraying using ZL109 material as matrix,and the basic prop-erties of the coating,such as macroscopic and microscopic morphology,microhardness,bonding strength and po-rosity are characterized systematically.On this basis,the working load and frequency of the piston are simulated,the dry friction tests under laboratory temperature were carried out to evaluate the tribological properties of the coating.The results show that the Ni-based alloy coating prepared by plasma spraying on aluminum alloy piston for automobile engine has dense internal structure and excellent mechanical properties,the microhardness is 838.10 HV0.1,the bonding strength is 12.27 MPa,and the cross-section porosity is 3.82%.Under the dry fric-tion condition at normal temperature,the wear weight loss of coating was less than that of aluminum alloy,which was only 3.2 mg.Therefore,the Ni-based alloy coating prepared by plasma spraying can significantly improve the wear resistance of aluminum alloy piston.
作者
韩冰源
杜伟
徐文文
高祥涵
楚佳杰
吴成
HAN Bingyuan;DU Wei;XU Wenwen;GAO Xianghan;CHU Jiajie;WU Cheng(School of Automotive and Traffic Engineering,Jiangsu University of Technology,Changzhou 213001,China)
出处
《江苏理工学院学报》
2021年第6期1-8,共8页
Journal of Jiangsu University of Technology
基金
2019年基础研究项目“增材修复智能规划与形性调控”(61400040407)
江苏省自然科学基金项目“极端苛刻服役条件下发动机损伤关键件热障涂层强化机理研究”(BK20191036)
2019年基础科研计划项目“铝合金表面低温超音速火焰喷涂与激光重熔处理镍基覆层制备及表征”(JCKY61420051911)。
关键词
发动机活塞
铝合金
等离子喷涂
镍基涂层
磨损性能
engine piston
aluminum alloy
plasma spraying
Ni-based coating
wear performance
作者简介
韩冰源,副教授,博士,主要研究方向为报废汽车绿色拆解与再制造、表面工程、热喷涂。
