基于电子态密度变化效应的面齿轮材料飞秒激光动能量传热模型与烧蚀规律研究  

Femtosecond Laser Dynamic Energy Heat Transfer Model and Ablation Law Study of Face Gear Materials Based on Electron Density Change Effect

作　　者：吴陶 明兴祖[1] 熊良才[2] 李湾 刘海渔 Wu Tao;Ming Xingzu;Xiong Liangcai;Li Wan*;Liu Haiyu(School of Mechanical Engineering,Hunan University of Technology,Zhuzhou 412007,Hunan,China;School of Mechanical Science&Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Department of Mechanical and Electrical Engineering,Hunan Automotive Engineering Vocational College,Zhuzhou 412000,Hunan,China)

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412007 [2]华中科技大学机械科学与工程学院,湖北武汉430074 [3]湖南汽车工程职业学院机电工程学院,湖南株洲412000

出　　处：《应用激光》2024年第5期68-79,共12页Applied Laser

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优秀青年项目(22B0994);湖南省自然科学基金项目(2023JJ50207,2021JJ30214)。

摘　　要：飞秒激光精修是面齿轮精密加工的最后工序。研究飞秒激光烧蚀面齿轮材料18Cr2Ni4WA的物理过程作用机理,在基本的双温方程基础上,研究电子态密度变化效应,建立飞秒激光烧蚀面齿轮材料的动能量传热模型,仿真分析了飞秒激光烧蚀面齿轮材料的电子温度和晶格温度变化。飞秒激光烧蚀面齿轮材料试验发现,随着能量密度的增大,凹坑半径和深度都有一定的增大,且凹坑熔融物趋于增多,当能量密度为1.58 J/cm^(2)时烧蚀质量较好;随着脉宽的增大,形貌变化不大,但熔融物产生逐渐减少,凹坑趋于平整。通过研究飞秒激光烧蚀面齿轮材料18Cr2Ni4WA的烧蚀规律,为提高面齿轮的精密加工质量提供了参考。Femtosecond laser finishing can be used as the final step in the precision machining of face gears.In this paper,the mechanism of the physical process action of the femtosecond laser ablation of the face gear material 18Cr2Ni4WA is studied.Based on the basic double temperature equation,the effect of electron density of states change is investigated,the dynamic energy heat transfer model of the femtosecond laser ablation of the face gear material is established,and the changes of electron temperature and lattice temperature of the femtosecond laser ablation of the face gear material are simulated and analysed.The experiments of femtosecond laser ablated gear material are carried out,and it is found that with the increase of energy density,the radius and depth of the crater are increased,the melt of the crater tends to increase,and there is a better quality of ablation when the energy density is 1.58J/cm^(2).With the increase of pulse width,the morphological changes are not significant,but the melt production tends to decrease,and the crater tends to be flat.By studying the ablation law of the femtosecond laser ablation face gear material 18Cr2Ni4WA,it provides a reference for improving the precision machining quality of the face gear.

关 键 词：飞秒激光 面齿轮材料 电子态密度变化效应 动能量传热模型 烧蚀规律 

分 类 号：TH132.41[机械工程—机械制造及自动化] TN249[电子电信—物理电子学]