Electrochemical machining characteristics and resulting surface quality of the nickel-base single-crystalline material LEK94

摘要: Abstract Nickel-base single-crystalline materials such as LEK94 possess excellent thermo-mechanical properties at high temperatures combined with low density compared to similar used in aero engines. Since the components of engines have fulfil demanding safety standards, machining material for these must result a geometrical accuracy addition surface quality. These requirements can be achieved by electrochemical and precise (ECM/PECM). In order identify proper parameters PECM characteristics dependent on microstructure chemical homogeneity are investigated this contribution. The current was found major parameter affecting quality LEK94. It depends size machining-gap, applied voltage electrical conductivity electrolyte used. Low densities yield inhomogeneous dissolution different microstructural areas lead rough surfaces. High qualities employing homogenous dissolution, which undertaken densities. Furthermore, special electrode developed improvement side-gap machined