基于三维双温模型的飞秒激光烧蚀面齿轮材料形貌研究  

Study on Material Morphology of Femtosecond Laser Ablated Surface Gear Based on 3D Two-Temperature Model

作　　者：袁磊 明兴祖[1] 李湾 刘海渔 周静[1] 颜敏 YUAN Lei;MING Xingzu;LI Wan;LIU Haiyu;ZHOU Jing;YAN Min(College of Mechanical Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China;Department of Mechanical and Electrical Engineering,Hunan Automotive Engineering Vocational College,Zhuzhou Hunan 412000,China)

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412007 [2]湖南汽车工程职业学院机电工程学院,湖南株洲412000

出　　处：《包装学报》2023年第6期73-82,共10页Packaging Journal

基　　金：湖南省教育厅科学研究基金资助优秀青年项目(22B0994)。

摘　　要：在传统双温模型基础上,建立考虑变离焦量效应和随电子温度变化的动态吸收率效应的三维双温模型。分析烧蚀过程中电子、晶格温度的变化情况和烧蚀凹坑的形貌。对面齿轮材料18Cr2Ni4WA进行飞秒激光烧蚀实验结果表明:随着单脉冲飞秒激光能量密度的增大,电子的峰值温度升高,烧蚀凹坑的深度和直径增大;单脉冲飞秒激光的脉宽对烧蚀形貌的影响并不显著;烧蚀凹坑的直径和深度不会随脉冲数目一直增大,脉冲数目存在阈值,超过该阈值对于烧蚀凹坑的形貌影响反而不利。On the basis of traditional two-temperature model,a three-dimensional two-temperature model considering the variable defocus effect and the dynamic absorptivity effect with electron temperature was established.The changes of electron and lattice temperatures and the morphology of the pits during ablation were analyzed.The results of femtosecond laser ablation experiment on the surface gear material 18Cr2Ni4WA showed that with the increase of single pulse femtosecond laser energy density,the peak electron temperature increased,and the depth and diameter of the ablation pits increased continuously.The pulse width of single pulse femtosecond laser had no significant effect on the ablation morphology.The diameter and depth of ablative pits did not increase with the number of pulses,and the number of pulses had a threshold,beyond which the morphology of pits was adversely affected.

关 键 词：飞秒激光 三维双温模型 动态吸收率 烧蚀形貌 

分 类 号：TN249[电子电信—物理电子学]