| 摘要 |
PURPOSE:To eliminate need of magnetic field orientation to easily obtain a highly characteristic magnet by hot-rolling ultra-rapidly cooled Nd-Fe-B powder to be anisotropic and also orientating the anisotropic powder to be hot- compression-molded. CONSTITUTION:When an R2TM14B1 tetragonal compound {where R is a rare earth element containing at least one of Nd and Pr, and TM=Fe1-xCOx (0<=x<=0.4)} is used as a main phase to manufacture a rare earth magnet by molding anisotropic rare earth magnetic powder wherein a diameter of a crystal particle of the tetragonal compound is 1mum or below, the following steps are taken. That is, when a shape of the powder is flat while the thickness is (t) and the maximum length is (d), such powder wherein 0.1mm<=(t)<=2mm and 2<=(d)/(t)<=40 is laminate-orientated and hot-compression-molded. In addition 5 atomic percentage or below of Co is contained in this powder. The hot- compression-molding is performed with a pressure applied and heated with power supplied. |
