| 摘要 |
PURPOSE: To provide a manufacturing method of a highly efficient R-Fe-B rare earth magnet, which is in specific compositional region and has the R-Fe- Ga-Al phase as a constituent phase, and a rare earth magnet which is formed by conducting hot rolling a cast ingot and also by conducting a heat treatment. CONSTITUTION: The subject manufacturing method contains the method for manufacture of rare earth magnet consisting of Pr, Fe, B, Ca and Al, containing Pr of 15.0 to 17.5atom%, Ga of 0.1 to 0.8atom%, B of 4.8atom% or more, and the remaining Fe quantity of positive value and having a Pr-Fe-Ga-Al phase, a rare earth magnet on which Nd and Dy are partially substituted, and a magnet formed by conducting a hot rolling method. In the magnet having the above- mentioned composition and compositional phase, high magnetic characteristics, especially high coercive force, can be obtained. Accordingly, the advantages of the rare earth magnet formed by a hot rolling method, in which excellent mechanical strength can be obtained, can be promoted. |
