MANUFACTURING METHOD OF RARE EARTH-BASED PERMANENT MAGNET HAVING DEPOSITION FILM ON SURFACE

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a rare earth-based permanent magnet for forming a uniform deposition film as a corrosion-resistant film having excellent coherency on the surface stably, without generating cracks and cutout during manufacture and deteriorating magnetic characteristics. SOLUTION: The manufacturing method should include a process for forming a deposition film on the surface of an aging treatment body, by performing deposition treatment to an aging treatment body after a rare earth-based permanent magnet sintering body having a desired composition is subjected to cutting machining and/or grinding machining, and an obtained machining body is washed for carrying out aging treatment.