公开(公告)号：US06352597B1

公开(公告)日：2002-03-05

申请号：US09554841

申请日：2000-07-14

申请人： Oliver Gutfleisch ,  Michael Kubis ,  Axel Handstein ,  Bernhard Gebel ,  Karl-Hartmut Mueller ,  Ivor Harris ,  Ludwig Schultz

发明人： Oliver Gutfleisch ,  Michael Kubis ,  Axel Handstein ,  Bernhard Gebel ,  Karl-Hartmut Mueller ,  Ivor Harris ,  Ludwig Schultz

IPC分类号： H01F106

CPC分类号： H01F1/0553 ,  B22F9/023 ,  B22F9/04 ,  B22F2999/00 ,  B22F2201/013 ,  B22F1/0085

摘要： A method is disclosed enabling a technologically controllable and economical production of a hard-magnetic powder composed of a samarium-cobalt base alloy for highly coercive permanent magnets. The method is based on a HDDR treatment in which a starting powder is subjected to hydrogenation with disproportionation of the alloy in a first method step under hydrogen and, in a subsequent, second method step under vacuum conditions, a hydrogen desorption with recombination of the alloy. A starting powder containing samarium and cobalt is treated in the first method step either at a high temperature in the range of 500° C. to 900° C. and with a high hydrogen pressure of >0.5 MPa or by applying an intensive fine grinding at a low temperature in the range of 50° C. to 500° C. and with a hydrogen pressure of >0.15 MPa. By means of the method of the invention, magnetic alloy powders can be produced from samarium-cobalt base alloys; highly coercive permanent magnets can be produced from these magnetic alloy powders, particularly by hot compacting or plastic bonding.

摘要翻译： 公开了一种能够技术上可控和经济地生产由用于高矫顽永磁体的钐 - 钴基合金组成的硬磁粉末的方法。 该方法基于HDDR处理，其中起始粉末在第一方法步骤中在氢气下以合金的歧化进行氢化，并且在随后的第二方法步骤中，在真空条件下，通过合金的复合氢解吸 。 在第一方法步骤中，在500℃至900℃的高温和> 0.5MPa的高氢气压力下或通过在 在50℃至500℃的范围内的低温和> 0.15MPa的氢气压力。 通过本发明的方法，可以由钐钴基合金制备磁性合金粉末; 可以通过这些磁性合金粉末，特别是通过热压实或塑性粘合来制造高矫顽永久磁铁。