-
公开(公告)号：US20160097110A1
公开(公告)日：2016-04-07
申请号：US14859579
申请日：2015-09-21
CPC分类号： C21D8/1216 , B22F1/0003 , B22F3/10 , C21D1/18 , C21D8/12 , C22C30/02 , C22F1/00 , H01F1/0557 , H01F41/0266 , H01F41/0273
摘要： 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.
摘要翻译： 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.
-
2.发明申请公开(公告)号：US20200208781A1
公开(公告)日：2020-07-02
申请号：US16672614
申请日：2019-11-04
发明人： Takaaki TAKAHASHI , Osamu YAMASHITA
摘要： An amount Y of liquid hydrogen that has passed through a first valve and has been volatilized during a predetermined time after first and second valves are opened is calculated by using a pressure P0 in an internal space of a liquid hydrogen tank measured before the two valves are opened, a pressure P1 in the internal space measured after the lapse of the predetermined time since the two valves are opened, and an amount X of the gaseous hydrogen that has passed through the second valve during the predetermined time. A fluid level H of the liquid hydrogen in the liquid hydrogen tank after the lapse of the predetermined time since the two valves are opened is calculated by using a expression showing a relationship between the H and an amount Y1 of the liquid hydrogen that passes through the first valve and drops therefrom, and the Y.
-
公开(公告)号：US20180112812A1
公开(公告)日：2018-04-26
申请号：US15722225
申请日：2017-10-02
发明人： Takaaki TAKAHASHI
IPC分类号： F16L59/065
摘要： Provided is a vacuum beat insulation structure for a heating furnace having a beating space covered by an inner cylinder serving as an inner wall, and an outer cylinder serving as an outer wall configured to cover the inner cylinder, and a vacuum space formed between the inner cylinder and the outer cylinder, the vacuum heat insulation structure including a reflective film disposed in the vacuum space and configured to prevent transfer of radiant heat from the inner cylinder to the outer cylinder in the vacuum space, and a fixing tool configured to fix the reflective film to an inner surface of the outer cylinder so as not to come in contact with an outer surface of the inner cylinder.
-
公开(公告)号：US20190060991A1
公开(公告)日：2019-02-28
申请号：US16037213
申请日：2018-07-17
发明人： Takaaki TAKAHASHI
IPC分类号： B22D41/01
摘要： A molten metal holding container 1 includes an extraction outer pipe 12, an extraction inner pipe 13 and a load receiving part 7 including a first protrusion 7a protruding from an outer circumference of the inner pipe 3 in the horizontal direction and a second protrusion 7b protruding from an inner circumference of the outer pipe 2 in the horizontal direction so as to be opposed to the first protrusion 7a in a vertical direction, the second protrusion 7b being configured to receive a load of the inner pipe 3 through the first protrusion 7a, in which a vertical position of the load receiving part 7 coincides with a vertical position of a central axis of the extraction inner pipe 13.
-
公开(公告)号：US20160104572A1
公开(公告)日：2016-04-14
申请号：US14833803
申请日：2015-08-24
CPC分类号： H01F41/0266 , B22F3/003 , B22F3/16 , B22F2998/10 , C22C2202/02 , H01F1/0576 , H01F1/0577
摘要： Provided is a method for manufacturing a rare-earth magnet capable of preventing the lubricant from flowing down during hot deformation processing, whereby friction force can be made as uniform as possible at the overall region of the sintered body, and so the rare-earth magnet manufactured can have less distribution of magnetic performance. A method for manufacturing a rare-earth magnet includes: a first step of sintering magnetic powder MF as a material of the rare-earth magnet to prepare a sintered body S; and a second step of placing the sintered body S in a cavity K of a forming die M made up of a die D and a lower punch P and/or an upper punch P sliding in the die D, and performing hot deformation processing of the sintered body S to give magnetic anisotropy to the sintered body to manufacture the rare-earth magnet C. In the second step, a lubrication sheet 10 is disposed between a side face of each of the lower and the upper punches P, P facing the cavity K and the sintered body S, the lubrication sheet including a pair of graphite sheets 11 and glass-based lubricant 12 sandwiched therebetween, and the hot deformation processing is performed while sandwiching the sintered body S between the upper and the lower lubrication sheets 10.
摘要翻译： 本发明提供一种在热变形加工中能够防止润滑剂向下流动的稀土类磁体的制造方法，能够使烧结体的整个区域的摩擦力尽可能均匀，稀土类磁铁 制造的磁性能分布较少。 稀土类磁铁的制造方法包括：将作为稀土类磁铁的材料的磁性粉末MF烧成烧结体S的第1工序; 以及第二步骤，将烧结体S放置在由模具D构成的成形模具M的空腔K和在模具D中滑动的下冲头P和/或上冲头P之间，并进行热变形处理 烧结体S对烧结体产生磁各向异性以制造稀土类磁体C.在第二步骤中，在下冲头和上冲头P，P的面向腔体的侧面之间设置润滑片10 K和烧结体S，将包含一对石墨片11和夹在其间的玻璃基润滑剂12的润滑片进行热变形处理，同时将烧结体S夹在上部和下部润滑片10之间。
-
-
-
-
搜索结果
5 条记录 (耗时 0.014 秒)