公开(公告)号：US07172659B2

公开(公告)日：2007-02-06

申请号：US10481025

申请日：2002-06-24

申请人： Hiroyuki Tomizawa ,  Koji Nakahara ,  Yuji Kaneko

发明人： Hiroyuki Tomizawa ,  Koji Nakahara ,  Yuji Kaneko

IPC分类号： H01F1/053 ,  H01F1/057 ,  H01F1/058

CPC分类号： H01F1/057 ,  H01F1/0578 ,  H01F1/058 ,  H01F41/0253

摘要： The present invention is a production method of an R-T-B—C rare earth alloy (R is at least one element selected from the group consisting of rare earth elements and yttrium, T is a transition metal including iron as a main component, B is boron, and C is carbon). An R-T-B bonded magnet containing a resin component, or an R-T-B sintered magnet with a resin film formed on the surface thereof is prepared, and a solvent alloy containing a rare earth element R and a transition metal element T is prepared. Thereafter, the R-T-B bonded magnet is molten together with the solvent alloy. In this way, a rare earth alloy can be recovered from a spent bonded magnet or a defective one generated in a production process stage, and a rapidly quenched alloy magnet can be obtained. As a result, magnet powder is recovered from the R-T-B magnet, and the recycling of a magnet including a resin component can be realized.

摘要翻译： 本发明是RTBC稀土类合金的制造方法（R为选自稀土元素和钇中的至少一种元素，T为以铁为主要成分的过渡金属，B为硼，C为 是碳）。 制备含有树脂组分的R-T-B粘结磁体或其表面上形成有树脂膜的R-T-B烧结磁体，并制备含有稀土元素R和过渡金属元素T的溶剂合金。 此后，R-T-B粘结磁体与溶剂合金一起熔融。 以这种方式，可以从废粘结磁体或在生产工艺阶段产生的缺陷合金中回收稀土合金，并且可以获得快速淬火的合金磁体。 结果，从R-T-B磁体中回收磁铁粉末，能够实现包含树脂成分的磁体的再循环。