| 摘要 |
PURPOSE:To enhance both saturation magnetization and residual magnetic flux density of rare earth magnet material, and to improve its magnetic characteristics by a method wherein, to the rare earth-iron-boron hard magnetic powder formed by a super-quenching method, hard magnetic material, containing iron of specific quantity or more and having the saturation magnetization higher than the above-mentioned hard magnetic powder, is added. CONSTITUTION:An alloy in the composition of Nd11.9Fe82.6B5.5 is formed by a high frequency melting furnace, the obtained alloy is formed into a quenched ribbon by a single rolling method, and it is pulverized. After the pulverized powder is hot-pressed, hot-formed and heat-treated, the bulk magnet is pulverized and anisotropic hard magnetic powder is obtained. To this anisotropic hard magnetic powder of 60 to 99.5vol.%, hard magnetic powder, containing iron of 40atom% and having the saturation magnetization larger than the above- mentioned anisotropic hard magnetic powder, is added and uniformly mixed. As a result, the saturation magnetization and the residual magnetic flux density of the rare earth magnet material can be enhanced. |
