纳秒激光修正齿轮材料20CrMnTi的烧蚀特性  

Ablation Characteristics of Nanosecond Laser Correction Gear Material 20CrMnTi

作　　者：明兴祖[1] 金磊 申警卫 明瑞 Ming Xingzu;Jin Lei;Shen Jinwei;Ming Rui(School of Mechanical Engineering, Hunan University of Technology, Zhuzhou, Hunan, 412007, China)

机构地区：[1]湖南工业大学机械工程学院

出　　处：《激光与光电子学进展》2019年第18期181-189,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51375161);湖南省自然科学基金(2017JJ4023);湖南省研究生科研创新项目(CX2018B749)

摘　　要：激光修正技术是一种采用高能量密度激光对齿轮表面进行微加工的新型加工方法。基于傅里叶能量吸收现象,考虑能量累积、蒸发等效应,建立纳秒脉冲激光微修正的动能量热模型,通过仿真分析了纳秒激光修正齿轮材料20CrMnTi温度场的演变规律,观察了修正表面烧蚀坑的形貌,测量了烧蚀坑的深度和拉曼光谱。实验不仅证实了动能量热模型的正确性与可行性,也为纳秒脉冲激光微修正齿轮的研究提供了理论指导。Laser correction technology is a new processing method that uses high energy density lasers for conducting micromachining on gear surfaces. This study establishes a dynamic energy thermal model of nanosecond pulse laser microtrimming, and simulates and analyzes the evolution rule of surface temperature filed during the process of 20CrMnTi gear material microtrimming using a nanosecond laser based on the Fourier energy absorption phenomenon and considering various effects such as energy accumulation and evaporation. In addition, the morphologies of the ablation craters of the trimmed surface are experimentally observed, and the ablation crater depth and Raman spectrum are measured. Furthermore, the experiment results verify the accuracy and feasibility of the dynamic energy thermal model and provide theoretical guidance for gear microtrimming using a nanosecond pulse laser.

关 键 词：激光技术 脉冲激光修正 传热模型 烧蚀特性 拉曼光谱 

分 类 号：TN24[电子电信—物理电子学]