摘要
为了研究不同喷涂方式下镍铝涂层的显微组织与力学性能,通过大气等离子喷涂和超音速火焰喷涂两种方式分别制备了镍铝涂层,对涂层显微组织、显微硬度、结合强度进行了比较分析。结果表明:大气等离子喷涂的镍铝涂层组织均匀,孔隙率低,无裂纹,含有一定的氧化物,等离子焰流能使Ni5Al粉末充分熔化,致使涂层具有较高的显微硬度和结合强度;超音速火焰喷涂的镍铝涂层组织存在大量未熔颗粒,显微硬度和结合强度均低于大气等离子喷涂的镍铝涂层。
In order to study the microstructure and mechanical properties of the nickel-aluminum coating under different spraying methods,nickel-aluminum coating was prepared by atmospheric plasma spraying and supersonic flame spraying,respectively,and the microstructure,microhardness and bonding strength of the coating was compared and analyzed.The results show that the nickel-aluminum coating sprayed by atmospheric plasma has uniform microstructure,low porosity,no cracks,and contains certain oxides.Plasma flame flow can fully melt the Ni5Al powder,resulting in higher microhardness and bonding strength of the coating.The microstructure of the nickel-aluminum coating sprayed by supersonic flame contains a large number of unmelted particles,and its microhardness and bonding strength are lower than those of the coating sprayed by atmospheric plasma.
作者
所彭帮
邱雯乐
龙金
成信虎
王泰铭
施念
陈翠英
SUO Pengbang;QIU Wenyue;LONG Jin;CHENG Xinhu;WANG Taiming;SHI Nian;CHEN Cuiying
出处
《现代机械》
2025年第1期98-101,共4页
Modern Machinery
关键词
镍铝涂层
显微组织
结合强度
显微硬度
nickel-aluminum coating
microstructure
bonding strength
microhardness
