Title:
RARE-EARTH BOND MAGNET MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2012/118001
Kind Code:
A1
Abstract:
This method for manufacturing a rare-earth bond magnet comprises: a step of preparing rare-earth rapid-quenching alloy magnetic powder; a step of preparing a solution of a resin that is solid at room temperature dissolved using an organic solvent; a step of fabricating a rare-earth bond magnet compound by kneading the rare-earth rapid-quenching alloy magnetic powder and the solution and causing the organic solvent to be activated, whereby magnetic powder particles constituting the rare-earth rapid-quenching alloy magnetic powder are coated with the resin; a step for compressing the rare-earth bond magnet compound at a pressure of no less than 1000 MPa and no more than 2500 MPa to fabricate a compact; and a step for heat treating the compact. The solution contains a resin of no less than 0.4% by mass to no more than 1.0% by mass and an organic solvent of no less than 1.2% by mass and not more than 20% by mass, taking the kneaded rare-earth rapid-quenching alloy magnetic powder to be 100% by mass.
Inventors:
TAKAYAMA KAZUHIRO (JP)
MIYOSHI TOSHIO (JP)
MIYOSHI TOSHIO (JP)
Application Number:
PCT/JP2012/054735
Publication Date:
September 07, 2012
Filing Date:
February 27, 2012
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
TAKAYAMA KAZUHIRO (JP)
MIYOSHI TOSHIO (JP)
TAKAYAMA KAZUHIRO (JP)
MIYOSHI TOSHIO (JP)
International Classes:
H01F41/02; B22F1/102; B22F3/00; B22F3/02; H01F1/055; H01F1/08
Foreign References:
| JP2010232468A | 2010-10-14 | |||
| JP2008108784A | 2008-05-08 | |||
| JPH09205013A | 1997-08-05 |
Attorney, Agent or Firm:
OKUDA SEIJI (JP)
Seiji Okuda (JP)
Seiji Okuda (JP)
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Claims:
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