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研究了NdFeB铸锭中显微组织的分布情况,观察到铸锭中Nd2Fe14B相、富Nd相以及αFe等显微组织的不均匀分布所造成的铸锭的不同部位的脆性不一样,使得在随后的气流磨制粉过程中磁粉不能以均匀的成分制出,导致烧结NdFeB磁体磁性能的严重不一致。
The distribution of the microstructure in the NdFeB ingot was studied. It was observed that the brittleness of different parts of the ingot caused by the uneven distribution of the Nd2Fe14B phase, the Nd-rich phase and the αFe microstructure in the ingot was different, Of the air milling process powder can not be made of uniform composition of the powder, resulting in a serious inconsistency of the magnetic properties of sintered NdFeB magnets.