东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2003, Vol. 24 ›› Issue (1): 64-67.DOI: -

• 论著 • 上一篇    下一篇

速凝铸造工艺制造高性能烧结Nd-Fe-B磁体

裴文利;连法增;周桂琴;付猛   

  1. 东北大学材料与冶金学院 ;东北大学材料与冶金学院 ;东北大学材料与冶金学院 ;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2003-01-15 发布日期:2013-06-23
  • 通讯作者: Pei, W.-L.
  • 作者简介:-
  • 基金资助:
    国家"十五"重点攻关项目(2002BA315A 6 5)·

Sintered Nd-Fe-B magnet produced by the strip casting technology

Pei, Wen-Li (1); Liang, Fa-Zeng (1); Zhou, Gui-Qin (1); Fu, Men (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2003-01-15 Published:2013-06-23
  • Contact: Pei, W.-L.
  • About author:-
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摘要： 研究了用速凝铸造工艺制造高性能烧结Nd Fe B磁体·同传统的铸锭工艺相比,速凝铸造工艺细化柱状晶,阻止α Fe枝晶相的产生,改善了铸态合金的微观结构·柱状晶宽度基本在5～25μm之间,尺寸较均匀;在制粉过程中容易得到粒度分布较好的磁粉;富Nd相分布较好,所以在较低烧结温度下可得到较高密度的磁体;由于具有细小均匀的微结构,利用速凝铸带工艺烧结出的磁体具有更高的Br,Hci和(BH)max·

关键词: 烧结Nd-Fe-B, 速凝铸造工艺, 晶粒尺寸, α-Fe相, 富Nd相, 粒度分布

Abstract: High performance Nd-Fe-B magnet produced by the strip casting (SC) was investigated. Compared with traditional ingot casting technology, the SC processing refines and homogenizes the columnar structures and suppresses the formation of α-Fe dendrites so that it greatly improves the microstructure in the as-casted alloy. It was found that the Nd-rich phase distributes uniformly along the grain boundaries of fine columnar matrix phase in the speed cooled strip. The columnar grains are about 5-25 μm in mean width. Using the cast strips for powder production, the fine powder with a good particle size distribution can be obtained easily. Due to the optimum distribution of Nd-rich phase, the magnets made from the cast strip shows high density even at a lower sintering temperature. The magnets made by SC technology showed a higher Br,Hci and (BH)max than that made by traditional ingot technology.

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