| 简介 |
PROBLEM TO BE SOLVED : To provide a manufacturing method of a bond magnet which has a high magnetization property, widens an adjustment range of a magnetization property, is simplified and reduces cost.SOLUTION : A manufacturing method of a bond magnet includes : a heating step for disposing magnetic field application means for magnetization in the vicinity of the bond magnet and making a temperature of the bond magnet rise equal to or higher than its Curie point; and a magnetization step for continuously applying a magnetization magnetic field to the bond magnet by the magnetic field application means for magnetization while making the temperature of the bond magnet that reaches a temperature equal to or higher than the Curie point, fall to a temperature lower than the Curie point. A magnet powder containing Nd and Pr as rare earth elements is used for the bond magnet. When adjusting a magnetization property of the bond magnet, a conditioning temperature that is an extraction temperature during cooling is adjusted, and the magnetic field application means for magnetization includes a permanent magnet for magnetization of which the Curie point is higher than that of the bond magnet.SELECTED DRAWING : Figure 6COPYRIGHT : (C)2018, JPO&INPIT |
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