氮化前显微组织对SmFeN合金磁性能的影响  

Effect of Microstructure Before Nitrogenation on Magnetic Properties of SmFeN Alloys

作　　者：马建勋[1] 严密[1] 赵传礼[1] 肖洪博[1] 文玉华[1] 杨德仁[1] 

机构地区：[1]浙江大学硅材料国家重点实验室,浙江杭州310027

出　　处：《材料科学与工程学报》2005年第2期244-247,251,共5页Journal of Materials Science and Engineering

摘　　要：本文研究了Sm含量 ,凝固速度及Nb和Zr元素的添加对Sm Fe合金微观组织及氮化后Sm2 Fe1 7Nx 合金磁性能的影响。研究结果表明 :采用真空感应炉熔炼Sm Fe合金 ,当Sm的补偿量大于 10wt%时 ,合金铸锭组织中出现大量的富Sm相 ,这将导致氮化后磁体磁性能的恶化 ;提高铸锭的冷却速度及添加Nb和Zr等元素可以有效地细化铸锭中α Fe相的晶粒 ,减少均匀化退火后α Fe相的数量 ,提高磁性能。Effects of Sm content, cooling velocity and the additions of Nb and Zr on the microstructure before nitrogenation and magnetic properties of SmFeN were studied. The results show that when the compensation of Sm is more than 10wt%, there exist lots of Sm-rich phase in the SmFe casting prepared through induction furnace, deteriorating the magnetic properties of SmFeN after nitrogenation. The increase of the cooling velocity and the additions of Nb and Zr can refine the α-Fe dendrites in SmFe casting and reduce the amount of α-Fe phase in annealed alloys. After nitrogenation, the magnetic properties can be improved because of the reduction of α-Fe phase.

关 键 词：微观组织 Sm2Fei7Nx 磁性能 

分 类 号：TB34[一般工业技术—材料科学与工程]