铣削工艺参数对GH4169D高温合金表面完整性的影响  

Effect of Milling Process Parameters on Surface Integrity of GH4169D High-Temperature Alloy

作　　者：姚倡锋 李欣悦 曹艺隆 谭靓 Yao Changfeng;Li Xinyue;Cao Yilong;Tan Liang(Key Laboratory of High Performance Manufacturing for Aero Engine(Northwestern Polytechnical University),Ministry of Industry and Information Technology,Xi’an Shaanxi 710072,China;Engineering Research Center of Advanced Manufacturing Technology for Aero Engine(Northwestern Polytechnical University),Ministry of Education,Xi’an Shaanxi 710072,China)

机构地区：[1]航空发动机高性能制造工业和信息化部重点实验室,西北工业大学,陕西西安710072 [2]航空发动机先进制造技术教育部工程研究中心,西北工业大学,陕西西安710072

出　　处：《硬质合金》2024年第6期477-486,共10页Cemented Carbides

基　　金：陕西省创新能力支持计划项目(2022TD-60);中国陕西省重点研发计划项目(2024PT-ZCK-63);国家自然科学基金项目(92360309,92160301)。

摘　　要：GH4169D广泛用于航空发动机叶片的制造,铣削表面完整性显著影响叶片的工作性能。本文开展GH4169D高温合金铣削加工实验,研究不同工艺参数对加工表面完整性的影响。结果表明:GH4169D高温合金铣削加工切宽方向的表面粗糙度随着铣削速度的增大,呈现先增大后减小的变化趋势。随着切削宽度的增大,切宽方向粗糙度增大。铣削速度和切削深度对显微硬度影响较大,铣削速度越大,硬化现象越不明显;切削深度越大,硬化现象越明显。GH4169D铣削加工后表面残余应力为拉应力,切削速度越大,残余拉应力越大,每齿进给量与残余拉应力的关系与之相同;铣削速度变大时,表层残余应力深度逐渐变深,残余压应力峰值变小;随着铣削宽度的变大,最大残余压应力深度变化不显著,但是峰值变化明显。切削深度ap在0.16~0.24mm时,表层残余应力变化明显,最大残余压应力的深度增加,峰值减小。塑性变形层随着铣削速度的增大而变薄,随着切削深度的增加而变厚。GH4169D has been widely used in the manufacturing of aero engine blades,and the surface integrity after milling significantly affects the working performance of the blades.The milling experiment of GH4169D high-temperature alloy was carried out to study the influence of different process parameters on the surface integrity after milling.The results show that with the increase in milling speed,the surface roughness of GH4169D high-temperature alloy during milling along width cutting direction first increases and then decreases.The roughness along the width cutting direction increases with the increase in cutting width.Milling speed and cutting depth have a greater impact on microhardness.A large milling speed indicates a weak hardening phenomenon;a larger cutting depth indicates an obvious hardening phenomenon.The residual stress on the surface of GH4169D after milling is tensile stress,and a larger cutting speed indicates a larger residual tensile stress.The same relationship is shared between the residual tensile stress and the feed per tooth.When the milling speed becomes larger,the depth of the surface residual stress gradually becomes larger,and the peak of the residual compressive stress becomes smaller.As the milling width becomes larger,the depth of the maximum residual compressive stress does not change significantly,but the peak changes significantly.ap is within 0.16-0.24 mm,and the surface residual stress changes significantly.The depth of the maximum residual compressive stress increases,and the peak value decreases.The plastically deformed layer becomes thinner with increasing milling speed and thicker with increasing cutting depth.

关 键 词：GH4169D 铣削 硬质合金刀具 高温合金 表面完整性 

分 类 号：TG5[金属学及工艺—金属切削加工及机床]