H - Electricity – 01 – F
Patent
H - Electricity
01
F
31/129, 148/5
H01F 1/12 (2006.01) B22F 3/14 (2006.01) C22C 1/04 (2006.01) H01F 1/057 (2006.01) H02K 1/02 (2006.01) H02K 15/03 (2006.01)
Patent
CA 1310821
ABSTRACT OF THE DISCLOSURE In a magnetically anisotropic magnet for use in a motor, comprising at least one rare earth element (R), Fe and boron (B), said magnet having fine crystal grains, the improvement comprising Ga added in the magnet so that the magnet has a surface magnifica- tion of not less than 6, a residual magnetic flux density in the direction of easy magnetization of not less than 11 kG and a coercive force of not less than 12 kOe. The invention also provides a method of producing the magnetically anisotropic magnet for use in a motor, comprising the steps of: forming flakes by rapid quenching a molten alloy consisting of at least one rare earth element (R), Fe, boron (B) and an optical metal element (M); compacting the flakes to provide a green compact; and warm plastic working the green compact at a temperature between 600°C and 800°C at a strain rate of 0.0001 to 0.1 per second with a plastic working ratio (ho/h) of not less than 2.
576754
Iwasaki Katsunori
Nozawa Yasuto
Tanigawa Shigeho
Gowling Lafleur Henderson Llp
Hitachi Metals Ltd.
Iwasaki Katsunori
Nozawa Yasuto
Tanigawa Shigeho
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