发明申请
- 专利标题: Method for producing sintered magnet and alloy for sintered magnet
- 专利标题(中): 烧结磁体制造方法及烧结磁体用合金
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申请号: US10990333申请日: 2004-11-16
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公开(公告)号: US20050183791A1公开(公告)日: 2005-08-25
- 发明人: Tetsuya Hidaka , Chikara Ishizaka
- 申请人: Tetsuya Hidaka , Chikara Ishizaka
- 专利权人: TDK CORPORATION
- 当前专利权人: TDK CORPORATION
- 优先权: JP2003-387672 20031118
- 主分类号: B22F3/00
- IPC分类号: B22F3/00 ; B22F3/16 ; C22C1/04 ; H01F1/053 ; H01F1/057 ; H01F1/08 ; H01F41/02
摘要:
The present invention provides a method for producing a sintered magnet, which can have a sufficient sintered density even when the magnet has a low-R composition. The method is for producing a sintered magnet comprising R (R: one or more rare-earth elements), T (T: one or more transition metal elements essentially comprising Fe, or Fe and Co) and B (boron) as the main components, wherein a starting alloy prepared by strip casting is pulverized to a given particle size to form a fine powder, where the starting alloy comprises discolored deposit 1 on the surface and the area ratio of the discolored deposit 1 is 1.5% or less, the resulting fine powder is compacted in a magnetic field to prepare a compact, and the compact is sintered.
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