Green Laser Drilling Assisted with Jet Electrochemical Machining of Nickel-based Superalloy
Laset drilling is extensively used in the aerospace and aircraft industries．The most important application is the drilling of fine cooling holes in aero turbine engine components such as nozzle guide vanes and blades．However．1aser-drilled holes are typically associated with a number of inherent defects such as recast layer and spatter．In order to solve these problems．a novel hybrid process of laser drilling assisted with iet electrochemical machining(JECM-LD)has been developed to improve the overalI quality of Iaser-drilled holes．The process based on the application of a iet electroiyte，being aligned coaxially with the focused laser beam．on the workpiece surface．The effects ofthe jet electrolyte during the process mostly consist of electro chemical reaction，effective cooling with materials and transporting debris．A pulsed Nd： YAG laselwith frequency doubling is used in the JECM-LD experiments．On the basis of a measurement of laser attenuation in electrolyte．an experimental apparatus system iS built and JECM-LD experiments are performed on 0．5mm thickness nickel-based superaUoy sheets with the systern．The optical microscope is used to detect the experimental results．It is found that the recast layer and spatter have been effectively removed during the JECM-LD compared with laser drilling in ambient atmosphere conditions．The efficiency of JECM-LD with millisecond green laser is about 70％Of laser drilling in air．
Laser drilling Jet electrochemical machining Recast layer Spatter
H.Zhang J.W.Xu J.M.Wang
College of Mechanical & Electrical Engineering,NUAA,Nanjing,Jiangsu,210016,China College of Science,NUAA,Nanjing,Jiangsu,210016,China
国际会议
常州
英文
75-80
2009-11-19（万方平台首次上网日期，不代表论文的发表时间）