公开(公告)号：EP1386681B1

公开(公告)日：2007-01-17

申请号：EP02708697.4

申请日：2002-03-27

申请人： Neomax Co., Ltd.

发明人： KUNIYOSHI, Futoshi c/o SUMITO.SPEC.METALS CO.LTD. ,  KANEKO, Yuji c/o SUMITOMO SPECIAL METALS CO. LTD. ,  TSUJIMOTO, Akihito c/o SUMITO.SPEC.METALS CO.LTD. ,  SHIMAUCHI, Kazunari c/o SUMITO.SPEC.METAL.CO.LTD. ,  TANAKA, Kazuo c/o PALACE CHEMICAL CO., LTD. ,  MORI, Shizuo c/o PALACE CHEMICAL CO., LTD. ,  SUZUKI, Kiyofumi c/o PALACE CHEMICAL CO., LTD.

IPC分类号： B22F3/02 ,  H01F41/02 ,  H01F1/08 ,  B22F1/00 ,  C22C1/04 ,  H01F1/057

CPC分类号： B22F1/0059 ,  B22F1/0096 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/0441 ,  H01F1/0571 ,  H01F1/0577 ,  H01F1/0578 ,  B22F3/02 ,  B22F3/1021 ,  B22F2202/05

摘要： A method for producing a granulated powder of a R-Fe-B type alloy which comprises a step of preparing a powder of the R-Fe-B type alloy and a step of granulating the above powder by the use of at least one granulating agent selected from among a normal paraffin, iso-paraffin and an oligomer obtained by depolymerization, to thereby prepare the granulated powder. The granulated powder of a R-Fe-B type alloy produced by the method is excellent in fluidity and press formability, and also excellent in easiness in the removal of a binder.