| 摘要 |
PURPOSE:To avoid the crazing and cracking in the title rare earth element permanent magnet by a method wherein the title magnet comprising R, Fe, B, Ca as the material basic components manufactured by hot working and heat treatment after molding step has R6Fe11Ga3 phase as the composing phase while containing the alloy composition in a specific composition region. CONSTITUTION:The rare earth element permanent magnet to be manufactured by hot rolling step after melting down and molding step of an alloy using R (R represents rare earth element mainly comprising Pr, Nd) Fe, B, Ga as the material basic components and further heat treatment has R6Fe11Ga3 phase as a composing phase. Furthermore, when the alloy composition is represented by RxFeyBzGa100-x-y-z in atomic ratio, the earth element is to be in the composition region of x>=15, y-14z>0, z>=4, 100-x-y-z<2. In such a constitution, the title rare earth element permanent magnet having high performances and excellent corrosion resistance can be manufactured at low cost. |
