SC铸片热处理条件对HDDR Nd-Fe—B磁粉性能的影响  

Effect of Heat Treatment Conditions of Strip Casting Ribbon on the Magnetic Properties of HDDR Nd-Fe-B Magnetic Powders

作　　者：杨武[1] 刘敏[1] 韩广兵[1] 孙艳[2] 高汝伟[1] 

机构地区：[1]山东大学物理学院,济南250100 [2]山东理工大学物理与光电信息技术学院,淄博255049

出　　处：《金属材料研究》2008年第3期1-4,共4页Research on Metallic Materials

基　　金：国家自然科学基金资助项目（50671055）

摘　　要：采用优化的SC＋HDDR工艺制备了Nd15Fe78B7磁粉，分别研究了SC铸片的热处理温度及时间对HDDR磁粉性能的影响。研究结果表明，在热处理时间一定时，磁粉的矫顽力He和剩磁Br均随热处理温度的升高先增大后减小。热处理温度一定时，He和Br均随热处理时间的增加先增大后减小。当热处理温度及时间分别为1050℃和3h时，磁粉的矫顽力He和剩磁Br均达到最大值890kA／m和1．1T，其最大磁能积为241kJ／m^3。The effects of heat treatment temperature and time on magnetic properties of HDDR Nd15Fe78B7 magnetic powders prepared by SC＋HDDR modified process were studied. The results showed that for a determined heat treatment time, both the coercivity Ho and the remanence Br increase first, reach the maximum and then decrease with the increasing of heat treatment temperature. When the heat treatment temperature is determined, both Ho and Br increase first, reach the maximum and then decrease with the increasing of heat treatment time. He and Br of magnetic powders reach the maximum 890 kA/m and 1.1 T, and the maximum magnetic energy product achieves 241 kJ/m^3 while the heat treatment tem- perature and time are 1 050 ℃ and 3 h respectively.

关 键 词：SC+HDDR工艺 SC铸片 HDDR磁粉 剩磁 矫顽力 

分 类 号：TM273[一般工业技术—材料科学与工程] TL639[电气工程—电工理论与新技术]