| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method of an R-Fe-B-based sintered magnet on the surface of which an anticorrosive coating, e.g. a metal coating or a resin coating, having excellent corrosion resistivity and excellent adhesion can be formed and in which a part of RL is substituted with RH.SOLUTION: After performing step A of externally introducing RH by diffusion to an R-Fe-B-based sintered magnet to be processed, step B of heat treatment is performed at 200-500°C in an atmosphere where the oxygen partial pressure is 1×10-1×10Pa and the steam partial pressure is less than 1000 Pa, and the ratio of oxygen partial pressure and steam partial pressure (oxygen partial pressure/steam partial pressure) is 1-20000. |
