航空发动机叶片气膜孔加工方法及其演变分析  

Investigation of Processing Methods and Development of Gas Holes of Engine Blade

作　　者：刘新灵[1,2,3] 陶春虎[1,2,3] 刘春江[1,2,3] 胡春燕[1,2,3] 陈星[1,2,3] 

机构地区：[1]北京航空材料研究院,北京100095 [2]航空材料检测与评价北京市重点实验室,北京100095 [3]中航(试金石)检测科技有限公司,北京102200

出　　处：《材料导报》2013年第21期117-120,共4页Materials Reports

基　　金：航空基金(2010ZF21007)

摘　　要：系统分析了航空发动机叶片气膜孔加工的主要方法及其特点,分析了纳秒激光加工和电火花加工不可避免产生再铸层和微裂纹的原因与机理,以及再铸层和微裂纹对叶片疲劳性能的影响。介绍了飞秒激光及其加工特性,对比分析了飞秒激光加工各向同性等轴晶材料及定向高温合金和单晶高温合金的效果及其原因,指出充分研究飞秒激光对定向高温合金和单晶高温合金的损伤机理才能有效加工航空发动机叶片气膜孔。Processing and characteristics of gas holes of engine blade are investigated. The causes and mecha- nics of recast layer and microcracks induced by nanosecond laser machining and electric spark processing are analyzed. Fatigue performance is usually affected by recast layer and microcracks. The machining mechanics and characteristics of femtosecond laser are introduced, the causes of processing effect by femtosecond laser to isotropic material with equiaxed crystal and anisotropy material of directionally solidified and single crystal superalloys are analyzed using ana- lytical comparision. Femtosecond laser would be effectively used to machine gas holes of engine blade at the condition of sufficient researches of damage mechanics between femtosecond laser machining and directionally solidified and sin- gle crystal superalloys.

关 键 词：叶片气膜孔 纳秒激光加工 电火花加工 电液束加工 飞秒激光加工 

分 类 号：V26[航空宇航科学与技术—航空宇航制造工程]