发明申请
US20090000701A1 RARE EARTH MAGNET ALLOY INGOT, MANUFACTURING METHOD FOR THE SAME, R-T-B TYPE MAGNET ALLOY INGOT, R-TB TYPE MAGNET, R-T-B TYPE BONDED MAGNET, R-T-B TYPE EXCHANGE SPRING MAGNET ALLOY INGOT, R-T-B TYPE EXCHANGE SPRING MAGNET, AND R-T-B TYPE EXCHANGE SPRING BONDED MAGNET
审中-公开
R-T-B型磁铁合金，R-T-B型磁铁，R-T-B型磁铁，R-T-B型交换弹簧磁铁合金，R-T-B型交换弹簧磁铁和R-T-B型交换弹簧连接磁铁
- 专利标题： RARE EARTH MAGNET ALLOY INGOT, MANUFACTURING METHOD FOR THE SAME, R-T-B TYPE MAGNET ALLOY INGOT, R-TB TYPE MAGNET, R-T-B TYPE BONDED MAGNET, R-T-B TYPE EXCHANGE SPRING MAGNET ALLOY INGOT, R-T-B TYPE EXCHANGE SPRING MAGNET, AND R-T-B TYPE EXCHANGE SPRING BONDED MAGNET
- 专利标题（中）： R-T-B型磁铁合金，R-T-B型磁铁，R-T-B型磁铁，R-T-B型交换弹簧磁铁合金，R-T-B型交换弹簧磁铁和R-T-B型交换弹簧连接磁铁
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申请号： US12201722申请日： 2008-08-29
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公开(公告)号： US20090000701A1公开(公告)日： 2009-01-01
- 发明人: Hiroshi Hasegawa , Masahide Utsunomiya , Tadanao Ito
- 申请人： Hiroshi Hasegawa , Masahide Utsunomiya , Tadanao Ito
- 申请人地址： JP Tokyo
- 专利权人： Showa Denko K.K.
- 当前专利权人： Showa Denko K.K.
- 当前专利权人地址： JP Tokyo
- 优先权： JP2001-266278 20010903; JP2002-065263 20020311; JP2002-195404 20020704
- 主分类号： C22C38/00
- IPC分类号： C22C38/00 ; H01F1/01
摘要：
An R-T-B exchange spring magnet alloy ingot is provided, wherein the R-T-B exchange spring magnet alloy ingot comprises at least one element selected from Nd, Pr, and Dy in a total amount of 1 to 12% by atom and B in an amount of 3 to 30% by atom, with a balance being T (T represents a substance predominantly comprising Fe, with a portion of Fe atoms being optionally substituted by Co, Ni, Cu, Al, Ga, Cr, and Mn). The R-T-B exchange spring magnet alloy ingot is produced through formation of a composite of crystal grains of a hard magnetic phase and crystal grains of a soft magnetic phase. The R-T-B exchange spring magnet alloy ingot contains crystal grains of a hard magnetic phase having a grain size of 1 μm or less and crystal grains of a soft magnetic phase having a grain size of 1 μm or less in a volume of at least 50% on the basis of the entire volume of the alloy.
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