Title:
RARE EARTH ALLOY, ITS MANUFACTURING METHOD AND METHOD FOR MANUFACTURING RARE EARTH SINTERED MAGNET
Document Type and Number:
Japanese Patent JP3726888
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a rare earth alloy to which uniform treatment is possible in a short time in heat treatment for a thin strip ingot and its manufacturing method, and to provide a method for manufacturing a rare earth sintered magnet having excellent magnetic properties.
SOLUTION: An alloy essentially consisting of, by weight, 20 to 30% R (wherein, R is Sm or two or more kinds of rare earth elements including Sm by ≥50%), 10 to 45% Fe, 1 to 10% Cu and 0.5 to 5% Zr, and the balance Co is melted and is thereafter rapidly cooled by a strip casting method to obtain the rare earth alloy. The alloy contains isometric crystals with a grain size of 1 to 200 μm by ≥20 vol.% and has a sheet thickness of 0.05 to 3 mm. In this way, excellent magnetic properties can be obtained.
Inventors:
Koji Sato
Kazuaki Sakaki
Takahiro Hashimoto
Minowa Takehisa
Kazuaki Sakaki
Takahiro Hashimoto
Minowa Takehisa
Application Number:
JP2001271673A
Publication Date:
December 14, 2005
Filing Date:
September 07, 2001
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
B22F1/00; B22F3/02; B22F9/04; C22C1/02; C22C1/04; C22C19/07; C22C38/00; C22C38/16; H01F1/053; H01F1/055; H01F41/02; (IPC1-7): C22C19/07; B22F1/00; B22F9/04; C22C1/02; C22C1/04; C22C38/00; H01F1/053; H01F41/02
Domestic Patent References:
| JP3247737A | ||||
| JP3247729A | ||||
| JP5311271A | ||||
| JP5271881A | ||||
| JP8269643A | ||||
| JP63005501A | ||||
| JP59118827A | ||||
| JP56116844A |
Attorney, Agent or Firm:
Takashi Kojima
Yuko Nishikawa
Yuko Nishikawa