| 摘要 |
PURPOSE:To easily manufacture powder for a rare earth metal bond magnet excellent in a magnetic characteristic by executing dehydrogen treatment in reduced pressure, after executing hydrogen occluding and pulverizing treatment to R-T-M series sintering magnet material at the specific temp. and heat treatment in a hydrogen atmosphere. CONSTITUTION:The hydrogen occluding and pulverizing treatment is executed to R-T-M series sintering magnet material (wherein, R: one or more kinds among the rare earth metal elements containing Y, T: one or more kinds of transition metal elements, in which Fe is indispensable component and a part of Fe can be replaced with Co, M: one or more kinds of metalloids) in the temp. range of -200 - 600 deg.C. Successively, the heat treatment is executed in the hydrogen atmosphere at the temp. range of 600 - 900 deg.C. Thereafter, the dehydrogen treatment is executed in reduced pressure at the temp. range of 650 - 1,000 deg.C. By this method, reutilization of the expensive raw material is attained. |
