航空材料学报2025，Vol.45Issue(1)：62-69,8.DOI:10.11868/j.issn.1005-5053.2023.000212
激光冲击强化加工路径对齿轮钢表面力学性能影响规律研究
Influence of multi-point laser shock peening process on surficial mechanical properties in gear steels
摘要
Abstract
For the gears of aero-engine accessory system,the complex working environment requires high fatigue resistance and wear resistance on the gear surface.Laser shock peening technology introduces residual compressive stress and high micro-hardness by severe plastic deformation on the material surface.A more uniform residual stress field and hardness distribution are crucial to improve the fatigue life and wear resistance of the parts.Thus,it is an important topic to investigate how to obtain a uniform residual stress field and hardness distribution by optimizing the technical parameters of laser shock peening.In this paper,a four-layer overlapping laser shock peening path scheme is proposed,and the spatial distribution characteristics of residual stress and micro-hardness after laser shock peening are analyzed by the finite element numerical simulation and experiment.Using finite element numerical simulation method,the spatial homogeneous distribution of the residual stress field after the multi-point laser shock peening is studied.The effects of laser energy and impact times on the residual stress and micro-hardness of gear steel are experimentally investigated.The results show that the proposed four-layer overlapping laser shock peening path scheme can obtain a more uniform surface residual compressive stress field.With the increase of laser energy and impact times,the surface residual stress and micro-hardness also increase,but the increase magnitude will decrease,showing a certain saturation trend.关键词
激光冲击强化/有限元法/残余应力/多点冲击Key words
laser shock peening/finite element method/residual stress/multi-points shock分类
航空航天引用本文复制引用
薛成,雷敦财,颜雪源,臧顺来,董红涛,游志伟..激光冲击强化加工路径对齿轮钢表面力学性能影响规律研究[J].航空材料学报,2025,45(1):62-69,8.基金项目
两机重大专项 （）
