| 摘要 |
PURPOSE:To simply and inexpensively manufacture an anisotropic permanent magnetic having high performance by processing an ingot made by melting and casting a material containing rare earth metal, transition metal and boron as main ingredients by means of two or more types of hot processing methods. CONSTITUTION:An alloy containing rare earth metal, transition metal and boron as basic components is melted by induction heating furnace, cast, and cut out in a suitable size. This ingot is sealed in a sheath through mold release agent, and hot processed to be finely granulated in crystalline grains at 500 deg.C or higher, and to be magnetically anisotropically and mechanically oriented. Then, the ingot is removed from the sheath, and hot processed at 400 deg.C in an argon atmosphere. Thus, nonmagnetic R-rich phase liquid state is removed from the ingot, magnetic state is improved to be concentrated, magnetically anisotropically and mechanically oriented. Accordingly, an anisotropic permanent magnet having high performance can be simply and inexpensively manufactured. |
