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1.发明公开R-T-B-based rare earth magnet particles, process for producing the R-T-B-based rare earth magnet particles, and bonded magnet 审中-公开颗粒的R-T-B系稀土类磁铁的R-T-B系稀土类磁铁的制造方法及粘结磁铁的粒子
公开(公告)号：EP2645381A3
公开(公告)日：2016-12-28
申请号：EP13161404.2
申请日：2013-03-27
IPC分类号： H01F1/057
摘要： The present invention relates to a process for producing R-T-B-based rare earth magnet particles by HDDR treatment which comprises a first stage HD step of heating particles of a raw material alloy having a composition comprising R in an amount of not less than 12.5 atom% and not more than 14.3 atom%, B in an amount of not less than 4.5 atom% and not more than 7.5 atom% and Co in an amount of not more than 10 atom% to a temperature range of not lower than 770°C and not higher than 820°C in an inert atmosphere or in a vacuum atmosphere and then replacing the atmosphere with a hydrogen-containing gas atmosphere in which the raw material alloy particles are held in the same temperature range; and a second stage HD step of heating a material obtained in the first stage HD step again to a temperature range of not lower than 830°C and not higher than 870°C in which the material is held in the hydrogen-containing gas atmosphere.
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2.发明公开R-T-B-based rare earth magnet particles, process for producing the R-T-B-based rare earth magnet particles, and bonded magnet 审中-公开颗粒的R-T-B系稀土类磁铁的R-T-B系稀土类磁铁的制造方法及粘结磁铁的粒子
公开(公告)号：EP2645381A2
公开(公告)日：2013-10-02
申请号：EP13161404.2
申请日：2013-03-27
IPC分类号： H01F1/057
摘要： The present invention relates to a process for producing R-T-B-based rare earth magnet particles by HDDR treatment which comprises a first stage HD step of heating particles of a raw material alloy having a composition comprising R in an amount of not less than 12.5 atom% and not more than 14.3 atom%, B in an amount of not less than 4.5 atom% and not more than 7.5 atom% and Co in an amount of not more than 10 atom% to a temperature range of not lower than 770°C and not higher than 820°C in an inert atmosphere or in a vacuum atmosphere and then replacing the atmosphere with a hydrogen-containing gas atmosphere in which the raw material alloy particles are held in the same temperature range; and a second stage HD step of heating a material obtained in the first stage HD step again to a temperature range of not lower than 830°C and not higher than 870°C in which the material is held in the hydrogen-containing gas atmosphere.
摘要翻译： 由HDDR处理，其包括具有一个组合物在不低于5.12原子％的量的并且在包含R的原料合金的加热颗粒的第一阶段HD步骤，本发明涉及一种用于生产过程RTB基稀土磁体粉末 不大于14.3原子％，B在不低于4.5原子％的量并且不超过7.5原子％和Co在不超过10原子％的量的温度范围不低于770℃，而不是 比820℃更高的惰性气氛中或在真空气氛中，然后替换与将原料合金粉末在相同的温度范围内保持的含氢气体气氛气氛; 以及加热在第一阶段HD步骤再次获得的温度范围不低于830℃和不高于870℃，其中所述材料在所述含氢气体的气氛中进行的材料制成的第二级HD步骤。
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