镀铬活塞环表面椭圆微坑织构激光制备工艺研究  

Research on the Processes of Elliptical Micro-pit Texture on Chrome-plated Piston Ring Surface Fabricated by Laser

作　　者：李子航 刘国东 解长鹏 刘祁文 王明珠 Li Zihang;Liu Guodong;Xie Changpeng;Liu Qiwen;Wang Mingzhu(School of Mechanical Engineering,Shanxi Provincial Key Laboratory of Advanced Manufacturing Technology,North University of China,Taiyuan,Shanxi 030051,China)

机构地区：[1]中北大学机械工程学院先进制造技术山西省重点实验室,山西太原030051

出　　处：《应用激光》2022年第1期52-59,共8页Applied Laser

基　　金：国家自然科学基金青年基金(51705479);山西省自然科学基金(201801D121182)。

摘　　要：为优化激光制备表面微坑织构工艺参数,提高缸套-活塞环摩擦副的摩擦学性能,使用纳秒脉冲激光器在镀铬活塞环表面制备椭圆形微坑织构,探究激光功率、加工次数、扫描速度与填充线间距对微坑形貌及尺寸的影响。结果表明:增大激光功率与重复加工次数、降低扫描速度与填充线间距可有效提高微坑深度;微坑长径长度随激光功率增大而减小,随加工次数的增加先增加后减小,扫描速度与填充线间距对其影响较小。当加工参数为激光功率9 W、重复扫描3次、扫描速度200 mm/s、填充线间距1μm、激光重复频率30 kHz时,可以在镀铬活塞环表面加工出长半径200μm、短半径150μm、深度为38μm的目标微坑。研究结果为激光在活塞环表面制备微坑织构及改善摩擦副摩擦学性能的实际应用提供指导。In order to optimize the process parameters of laser preparation of surface micro-pit texture and improve the tribological performance of cylinder liner-piston ring friction pair,nanosecond pulse laser was used to prepare elliptical micro-pit texture on the surface of chrome-plated piston ring,which explored the influence of laser power,processing times,scanning speed and filling line spacing on the morphology and size of the micro-pits.The results show that increasing the laser power and repetitive processing times,reducing the scanning speed and filling line spacing can effectively increase the depth of the micro-pits.The length of the micro-pit length decreases with the increase of laser power,and it first increases and then decreases with the increase of processing times.The scanning speed and the spacing of the filling lines have a low influence on the length of the micro-pit length.When the processing parameters are laser power 9 W,repeated scanning three times,scanning speed 200 mm/s,filling line spacing 1 μm,and laser repetition frequency 30 kHz,a target with a long radius of 200 μm,a short radius of 150 μm and a depth of 38 μm can be machined on the surface of the chrome-plated piston ring micro-pits.The research results provide guidance for the practical application of laser preparation of micro-pit texture on the surface of piston ring and improvement of tribological properties of friction pairs.

关 键 词：激光微加工 表面微坑 织构 工艺参数 

分 类 号：TN249[电子电信—物理电子学]