TC4钛合金叶片双面同时激光斜冲击强化研究  

Study of Double-Sided Simultaneous Laser Oblique Shock Peening Strengthening of TC4 Titanium Alloy Blades

作　　者：汤洋 廖一凡 李斯魏 吴小燕 张永康 TANG Yang;LIAO Yi-fan;LI Si-wei;WU Xiao-yan;ZHANG Yong-kang(School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China;AECC South Industry Co.,Ltd.,Zhuzhou 412002,China)

机构地区：[1]广东工业大学机电工程学院,广东广州510006 [2]中国航发南方工业有限公司,湖南株洲412002

出　　处：《机械工程与自动化》2024年第3期103-104,107,共3页Mechanical Engineering & Automation

摘　　要：为了提高航空发动机叶片抗外物损伤能力,采用双面同时激光斜冲击方式对叶片前缘进行强化处理,研究双面同时激光斜冲击强化对叶片表面粗糙度、显微硬度、残余应力和变形的影响。结果表明:激光冲击后,叶片表面粗糙度由Ra0.374μm增加到了Ra1.582μm;叶片表面显微硬度平均值增加了50%;叶片表面残余应力均为压应力,最大残余压应力为-354.3 MPa;叶片最大变形量位于叶背面靠近叶尖的位置,变形与双面同时激光斜冲击强化在叶片前缘引入的不均匀残余应力分布密切相关。In order to improve the resistance of aero-engine blades to external damage,the leading edge of the blade is strengthened by double-sided simultaneous laser oblique shock,and the effects of double-sided simultaneous laser oblique shock peening on the surface roughness,micro-hardness,residual stress and deformation of the blade are investigated.The results showed that after laser impact,the surface roughness of the blade increased from Ra 0.374μm to Ra 1.582μm.The mean values of micro-hardness of the blade surface increased by 50%.The residual stress on the surface of the blade was compressive stress,and the maximum residual compressive stress was around-354.3 MPa.The maximum deformation of the blade was located at the back of the blade near the tip,and the deformation is closely related to the inhomogeneous residual stress distribution at the leading edge of the blade introduced by laser oblique impact strengthening.

关 键 词：TC4钛合金 整体叶盘叶片 双面同时激光斜冲击 强化处理 

分 类 号：TH140.1[一般工业技术—材料科学与工程] V232.4[机械工程—机械制造及自动化]