镍基合金电解加工小直径通孔

Nickel-based superalloys have the characteristics of high strength, high toughness, high-temperature fatigue strength, etc, so that there are many limitations when using traditional methods to process small holes. In this study, photolithography and electrolytic machining were combined to process through-holes with diameters of 1~2 mm in Ni-based alloys. By comparing the properties of NaCl, NaNO3, and ammonium cerium nitrate electrolyte systems, ammonium cerium nitrate was screened out as an electrolyte system suitable for nickel-based alloy processing. The anodic dissolution process and mechanism of nickel-based alloys were analyzed. The experimental results show that nitric acid as an additive can improve the performance of the electrolyte, and the current density has a significant effect on the processing speed.