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研究了Ｃｏ和Ｚｒ对ＮｄＦｅＢ合金ＨＤＤＲ粉显微组织和磁各向异性的影响。磁测量结果表明，Ｎｄ１３Ｆｅ８０．４Ｚｒ０．１Ｂ６．５基本上是磁各向同性的，而Ｎｄ１５Ｆｅ６６．９Ｃｏ１１Ｚｒ０．１Ｂ７合金粉末则具有较强的磁各向异性，显微组织观察发现，退火后ＮｄＦｅＢ合金中存在一些富Ｚｒ的新相，并且这些新相在ＨＤＤＲ处理过程中并不发生变化，而Ｃｏ在一定程度上抑制了这些新相的出现，不仅减小了该相的体积份数而且降低了其中的Ｚｒ含量。分析表明，对ＮｄＦｅＢ合金化学成分进行优化以保证硬磁相内溶有一定量的合金元素（例如Ｚｒ）是获得各向异性ＨＤＤＲ粉的关键所在。
The effect of Co and Zr on the microstructure and magnetic anisotropy of Nd-FeB alloy HDDR powder was studied. Magnetic measurements show that, Nd13Fe80.4Zr0.1B6.5 is essentially magnetic isotropic, and Nd15Fe66.9Co11Zr0.1B7 alloy powder has a strong magnetic anisotropy, the microstructure was observed after annealing Nd Fe Some new Zr-rich phases exist in B alloy, and these new phases do not change during the HDDR treatment. Co, to a certain extent, inhibits the appearance of these new phases, not only reduces the volume fraction of this phase But also reduce the Zr content therein. The analysis shows that optimizing the chemical composition of the Nd-Fe-B alloy to ensure that a certain amount of alloying elements (such as Zr) are dissolved in the hard magnetic phase is the key to obtain the anisotropic HDDR powder.