Research on Electrochemical-Assisted Micro-Milling Process on the Surface of GH4169 Superalloy
Due to the low thermal conductivity of GH4169 superalloy and its ability to maintain high strength at high temperatures,the cutting temperature and cutting force are high during milling process.Therefore,electrochemical-assisted micro-milling with an indexable double blade-double cathode milling cutter is used to process the surface of GH4169 superalloy.The changes in surface quality of electrochemi-cal-assisted micro-milling under different processing parameters are investigated,and the experimental re-sults of traditional milling and electrochemical-assisted micro-milling are compared.The results show that electrochemical-assisted micro-milling can remove defects such as tool marks,pitting,and debris on the surface of traditional milling,while corrosion pits and grain boundary corrosion defects appear.Compared with traditional milling,electrochemical-assisted micro-milling can significantly improve the surface quali-ty.The surface roughness and residual stress decrease with the increase of processing voltage.To obtain better surface quality,a higher processing voltage level should be selected.
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