摘要
通过同步超声振动和无超声振动两种方式对Ni25进行激光熔覆,分析了两种方式下的熔覆层在外观、组织及硬度方面的区别,进而得出:同步超声振动可显著改善熔覆层外观,熔覆层高度降低,熔池深度和熔覆层宽度增加;超声振动的空化效应使熔覆层显微组织得到了细化,合金元素中的强化相分布更加均匀,使晶界增加,进而提高了熔覆层的显微硬度。
The laser cladding of Ni25 is carried out by synchronous ultrasonic vibration and non-ultrasonic vibration.The difference of appearance,microstructure and hardness of the cladding layer under two modes is analyzed.It is concluded that synchronous ultrasonic vibration can significantly improve cladding.The appearance of the layer increases the height of the cladding layer,the depth of the molten pool and the width of the cladding layer.The cavitation effect of the ultrasonic vibration refines the microstructure of the cladding layer and increases the grain boundary,thereby increasing the appearance of the cladding layer micro hardness.
作者
姚芳萍
YAO Fangping(School of Mechanical Engineering and Automation,Liaoning University of Technology,Jinzhou 121001,CHN)
出处
《制造技术与机床》
北大核心
2020年第10期9-11,16,共4页
Manufacturing Technology & Machine Tool
基金
辽宁省教育厅项目“失效模具激光耦合仿生修复技术研究”(L2015231)
辽宁省科技厅项目“激光仿生非光滑表面热作模具的抗热疲劳性能与机理研究”(201602371)。
关键词
超声振动
Ni25
熔覆层外观
显微组织
晶界
显微硬度
ultrasonic vibration
Ni25
appearance of cladding layer microstructure
grain boundary
microhardness
