【摘要】 介绍了 NF40 H牌号 Nd Fe B永磁材料的研制过程。通过组合调配添加成分和采取一定的防氧化措施 ,用粉末冶金法生产出 Br=1 .2 98T,Hc B =963k A/ m,Hc J=1 4 0 8k A/ m,(BH ) m ax =31 8k J/ m3 的高性能 Nd Fe B永磁材料 ;对生产过程中材料的氧化机理作了初步探讨 ;通过背散射成象图对 Nd Fe B永磁材料的微观结构进行了分析 ;找到了一种适用的防氧化剂更多还原

【Abstract】 The process for producing NF40H grade NdFeB magnet materials is described in this paper. NdFeB magnet materials with B r =1.298 T ,H cB =963 kA/m ,H cJ =1408 kA/m , and (BH) max =318 kJ/m 3 have been manufactured by using composite additives and antioxidant. The oxidation mechanism during the process is analyzed initially. Microstructure analysis is performed on the samples by SEM back diffraction imaging. An applicable antioxidant is found for sinterecl NdFeB magnets.更多还原