公开(公告)号：US20160097110A1

公开(公告)日：2016-04-07

申请号：US14859579

申请日：2015-09-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Daisuke ICHIGOZAKI ,  Kensuke KOMORI ,  Daisuke SAKUMA ,  Takaaki TAKAHASHI

IPC: C21D8/12 ,  C22C30/02 ,  H01F1/055 ,  C22F1/00 ,  B22F3/10 ,  B22F1/00 ,  C21D1/18

CPC classification number: C21D8/1216 ,  B22F1/0003 ,  B22F3/10 ,  C21D1/18 ,  C21D8/12 ,  C22C30/02 ,  C22F1/00 ,  H01F1/0557 ,  H01F41/0266 ,  H01F41/0273

Abstract: Provided is a method for manufacturing a rare-earth magnet capable of manufacturing a rare-earth magnet having excellent magnetic characteristics from magnetic powder that is prepared by liquid rapid-quenching and including both of nano-crystalline substance and amorphous substance as well. A method for manufacturing a rare-earth magnet includes: a first step of rapidly quenching of molten metal that is represented by a composition formula of (R1)x(Rh)yTzBsMt (R1 denotes one type or more of light rare-earth element containing Y, Rh denotes a heavy rare-earth element containing at least one type of Dy and Tb, T denotes transition metal containing at least one type of Fe, Ni and Co, B denotes boron, M denotes at least one type of Ga, Al and Cu, and 27≦x≦44, 0≦y≦10, z=100-x-y-s-t, 0.75≦s≦3.4, 0≦t≦3 all in terms of percent by mass) to prepare magnetic powder MF including mixture of nano-crystalline magnetic powder having an average crystalline grain size of 500 nm or less and amorphous magnetic powder; and a second step of sintering the magnetic powder MF including the mixture of nano-crystalline magnetic powder and the amorphous magnetic powder to prepare a sintered body S, and performing hot deformation processing of the sintered body S to manufacture the rare-earth magnet C.

Abstract translation: 本发明提供一种制造稀土磁铁的方法，该稀土类磁铁具有通过液体快速淬火制备并且包括纳米结晶物质和无定形物质两者的磁粉的磁特性优异的稀土类磁铁。 稀土类磁体的制造方法包括：以（R1）×（Rh）yTzBsMt的组成式表示的熔融金属快速淬火的第一工序（R1表示含有 Y，Rh表示含有至少一种Dy和Tb的重稀土元素，T表示含有至少一种Fe，Ni和Co的过渡金属，B表示硼，M表示至少一种类型的Ga，Al 和Cu，以及27和nlE; x＆nlE; 44,0和nlE; y＆nlE; 10，z = 100-xyst，0.75＆nlE; s＆nlE; 3.4,0和nlE; t＆nlE; 3以质量百分比表示），以制备磁粉MF， 平均晶粒尺寸为500nm以下的纳米晶磁性粉末和无定形磁性粉末; 以及烧结包括纳米晶磁性粉末和非晶磁性粉末的混合物的磁性粉末MF以制备烧结体S的第二步骤，并进行烧结体S的热变形处理以制造稀土类磁体C.