| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a principal phase-based alloy containing a small quantity of formed α-Fe, by substituting Pr for Nd, which is advantageous for the cost, and improves an anisotropic magnetic field, in a principal phase-based alloy for a rare earth magnet consisting of an R-T-B alloy, which is used in a two- alloys method. <P>SOLUTION: This method for manufacturing the principal phase-based alloy is characterized by greatly restraining precipitation of α-Fe, through improving heat transfer between the molten alloy and the roller, by changing casting conditions, particularly the surface conditions of the rotation roller, when casting the principal phase-based alloy for the rare earth magnet by an SC (strip casting) method. Thereby, the method can substitute a large quantity of Pr for Nd, in the principal phase-based alloy containing little TRE (Total Rare Earth content) used for the two-alloys method. <P>COPYRIGHT: (C)2003,JPO |
