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Ｎｄ－Ｆｅ－Ｂ磁粉的各向异性是当前日益引人关注的一个问题，对Ｎｄ－Ｆｅ－Ｂ磁粉各向异性形硬化机制，本文对Ｎｄ－Ｆｅ－Ｂ－Ｃｏ－Ｍ（Ｍ＝Ｇａ，Ｎｂ）系进行了较为系统的研究，发现磁粉的Ｂｒ∥（平行于成形磁场方向）比Ｂｒ⊥（垂直于成形磁场方向）大了近１倍，说明Ｎｄ－Ｆｅ－Ｂ－Ｃｏ－Ｍ系的ＨＤＤＲ磁粉具有较强的各向异性，进一步的研究发现添加Ｇａ有助于提高ＨＤＤＲ磁粉的各向异性，此外本文还就添加元素对ＨＤＤＲ工艺条件的影响进行了研究，最后本文对ＨＤＤＲ法制备的Ｎｄ－Ｆｅ－Ｂ磁粉磁各向异性的形成机理进行了初步探讨。
The anisotropy of Nd-Fe-B magnetic powder is an issue that attracts more and more attention at present. For anisotropic hardening mechanism of Nd-Fe-B magnetic powder, Nd-Fe-B-Co- Nb) system has been studied systematically. It is found that the Br∥ (parallel to the forming magnetic field) of the magnetic powder is nearly twice as large as that of the Br⊥ (perpendicular to the forming magnetic field), indicating that Nd-Fe-B-Co-M HDDR magnetic powder with strong anisotropy, further study found that the addition of Ga helps to improve the HDDR magnetic anisotropy, in addition, this article also added elements on the HDDR process conditions were studied, and finally the preparation of HDDR Nd-Fe-B magnetic anisotropy magnetic formation mechanism was discussed.