飞秒激光烧蚀面齿轮材料的齿面表层形态研究  

Study on Tooth Surface Layer Morphology of Femtosecond Laser Ablation of Face Gear Material

作　　者：徐海军 李湾 米承继[1] 吴陶 李楚莹 明兴祖[1] XU Haijun;LI Wan;MI Chengji;WU Tao;LI Chuying;MING Xingzu(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2期34-41,49,共9页Packaging Journal

基　　金：国家自然科学基金资助项目(51975192);湖南省教育厅科学研究基金资助优秀青年项目(22B0994);湖南省自然科学基金资助项目(2021JJ30214、2021JJ50042);湖北省高等学校优秀中青年科技创新团队项目(T201919)。

摘　　要：针对面齿轮材料18Cr2Ni4WA,研究飞秒激光辐照面齿轮材料的热力效应,建立飞秒激光烧蚀面齿轮温度-应力耦合模型,分析多脉冲时不同能量密度下电子温度、晶格温度以及热应力的变化过程。结果表明:电子温度、晶格温度以及热应力随激光能量密度的增大而增大。实验和仿真的对比结果说明,烧蚀齿面表层为残余压应力,烧蚀深度和凹坑直径随激光能量密度的增加而增大,较大的激光能量密度会产生较多的熔融物,降低飞秒激光加工质量,当能量密度为1.78 J/cm^(2)时,齿面表层形态较好。本文为提高飞秒激光精微烧蚀面齿轮质量提供了研究基础。The thermal effect of femtosecond laser irradiation on the face gear material 18Cr2Ni4WA is studied,and the temperature-stress coupling model of femtosecond laser ablation of face gear is established.The changing process of electron temperature,lattice temperature and thermal stress under different energy densities with multiple pulses is analyzed.The results show that the electron temperature,lattice temperature and thermal stress increase with the increase of laser energy density.Through the comparative analysis of experiment and simulation,the results show that the surface of the ablation tooth surface is residual compressive stress.The ablation depth and pit diameter increase with the increase of laser energy density.The larger laser energy density produces more melt and reduces the quality of femtosecond laser processing.When the energy density is 1.78 J/cm^(2),the surface morphology of the tooth surface is better.The study could provide a research basis for improving the quality of femtosecond laser micro-ablation face gear.

关 键 词：飞秒激光 面齿轮 表层形态 残余应力 能量密度 

分 类 号：TG619[金属学及工艺—金属切削加工及机床]