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通过直接快淬制备了不同淬速的Ｎｄ８Ｆｅ８５ Ｍｏ１Ｂ６ 样品．由振动样品磁强计测量的结果发现，快淬速度对样品的磁性有很大的影响．对样品进行Ｘ 射线衍射和热磁分析发现，随着淬速的增加样品中的ＴｂＣｕ７ 相增多，同时软磁相的晶粒尺寸降低，认为样品的相组成和晶粒尺寸的变化是其磁性存在差异的原因．
Nd8Fe85 Mo1B6 samples with different quenching rates were prepared by direct quenching. The result of measurement by a vibrating sample magnetometer shows that the quenching speed has a great influence on the magnetism of the sample. X-ray diffraction and thermal analysis of the sample showed that with the increasing of quenching rate, the TbCu7 phase in the sample increased while the grain size of the soft magnetic phase decreased. It was considered that the phase composition and the grain size of the sample were changed to be magnetic The reason for the difference.