ELECTROLYTIC POLISHING TREATMENT METHOD FOR NICKEL-BASED ALLOY WORKPIECE
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United States of America Patent
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Jun 13, 2024
app pub date -
Dec 7, 2023
filing date -
Dec 7, 2022
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Abstract
An electrolytic polishing treatment method for a nickel-based alloy workpiece made by lamination manufacturing comprises the following steps. Step (A) comprises performing a sandblasting treatment on the nickel-based alloy workpiece, followed by ultrasonic oscillation of the sandblasted nickel-based alloy workpiece in an oxalic acid solution. Step (B) comprises placing the nickel-based alloy workpiece in an electrolyte solution containing methanol, sulfuric acid, and perchloric acid and performing electrolytic polishing on the nickel-based alloy workpiece at a constant voltage after step (A). The processes of oxalic acid activation and electrolytic polishing are used to avoid the problems of residual stress and processing directionality caused by conventional mechanical processing and make the surface properties of the entire workpiece uniform.
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