| 摘要 |
PURPOSE:To obtain a resin-bonded R-Fe-B permanent magnet having high performance and low cost by melting specific alloy, then quickly cooling it, pulverizing it, kneading and molding it with organic resin. CONSTITUTION:Alloy which contains 8-30 atomic % of R, 2-28 atomic % of B, 50 atomic % or less of Co, 15 atomic % of Al, the residue of iron and other impurities unavoidable in manufacture is melted, then quickly cooled, pulverized, kneaded and molded with organic resin. Then, an initial magnetization curve having an abrupt rise is provided, and the particle size to obtain suitable coercive force is 0.1-10mum. Thus, since the particle size of the main phase is reduced, even if it is pulverized, the degree of maintaining the grain boundary phase is large, and its coercive force is not so reduced. Thus, a resin- bonded rare earth iron magnet having high performance and low cost can be formed. |
