| 简介 |
PROBLEM TO BE SOLVED : To provide a method for produce a rare-earth-Fe-Co-B magnet having a superior magnetic characteristic without providing a demagnetizing step. SOLUTION : An R-Fe-Co-B alloy powder with a weak coersive force and residual hydrogen (R : at least one kind of rare-earth element including Y) which has a residual hydrogen of 0.01 to 0.5 wt.% and a coersive force of 0.01 to 8 kOe is oriented in a magnetic field, and it is molded by a press to form a green compact. Then the green compact is dehydrogenized at 700 to 900 deg.C in a vacuum atmosphere of 1 Torr or lower, and it is hot-pressed to form a rare-earth-Fe-Co-B magnet. |
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