片铸和锭铸Nd-Fe-B合金HDDR磁粉的比较及均质化处理的影响  

Comparison of strip and ingot casting Nd-Fe-B alloy HDDR magnetic powders and the effects of homogenizing treatment

作　　者：刘冬[1] 李野[1] 高俊彦[1] 刘荣明[1,2] 王倩[1] 贾立颖 滕阳民[1] 李炳山[1,2] LIU Dong;LI Ye;GAO Jun-yan;LIU Rong-ming;WANG Qian;JIA Li-ying;TENG Yang-min;LI Bing-shan(BGRIMM Magnetic Materials & Technology Co, Ltd , National Engineering Technology Research Center of Magnetic Materials, Beijing 102600, China;BGRIMM Magnetic Materials & Technology Co, Ltd (Fuyang Branch ) , Fuyang 236000, China)

机构地区：[1]北矿磁材科技有限公司国家磁性材料工程技术研究中心,北京102600 [2]北矿磁材科技有限公司(阜阳分公司),安徽阜阳236000

出　　处：《磁性材料及器件》2016年第6期27-31,共5页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(51401023)

摘　　要：以成分为Nd_(13.0)Fe_(80.1)B_(6.4)Ga_(0.3)Nb_(0.2)(at%)的速凝合金铸片为原料,采用HDDR工艺制备各向异性钕铁硼磁粉。研究了均质化热处理工艺和HDDR工艺对磁粉性能的影响。结果表明,在1000~1160℃温度范围内,随着均质化热处理温度的升高,磁粉的B_r和(BH)_(max)逐步提高;在0~20h时间范围内,随着均质化热处理时间的延长,磁粉的B_r和(BH)_(max)逐步提高;经由最佳均质化热处理(1160℃×20h)的速凝铸片制备的磁粉,其B_r为1.43T、Hcj为1.30MA/m、(BH)_(max)为352k J/m^3。在均质化热处理与HDDR工艺条件相同的情况下,使用片铸合金和传统锭铸合金制备的粘结磁体相比较,前者的B_r、(BH)_(max)分别高出后者约5%、10%。速凝铸片即使不进行均质化热处理,通过适当调整HDDR工艺参数也能制备出磁性能较佳的各向异性钕铁硼磁粉。HDDR-treated anisotropic powders were prepared from strip casting(SC)Nd13.0Fe80.1B6.4Ga0.3Nb0.2alloy flakes.Effect of homogenization heat treatment process and HDDR process on the magnetic properties were studied.The results show that in temperature range of1000to1160℃,with increasing homogenization heat treatment temperature,Br and(BH)max of the magnetic powder increase;in homogenization heat treatment time range of0to20h,with extending ghomogenization heat treatment time,both magnetic powder Br and(BH)max gradually increase;the powder obtained from the optimally annealed(1160℃×20h)alloy flakes,exhibits Br of1.43T,Hcj of1.30MA/m,and(BH)max of352kJ/m3.In the same conditions of homogenization heat treatment process and HDDR process,the Br and(BH)max of the bonded magnets from strip casting alloy are5%and10%higher than those of magnets from the traditional ingot casting alloy,respectively.Anisotropic Nd-Fe-B powders with excellent good magnetic performance can prepared from cast strip even without homogenization heat treatment by appropriately adjusting HDDR process parameters.

关 键 词：各向异性钕铁硼磁粉 片铸 锭铸 HDDR工艺 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]