铸造－热变形Pr－Fe－B永磁合金组织的研究  

Study On Microstructure of Casting Hot-Deforming Pr-Fe-B Permanent Magnet

作　　者：李国俊[1] 杨贤金[1] 赵乃勤[1] 姚家鑫[1] 

机构地区：[1]天津大学

出　　处：《金属热处理学报》1995年第1期25-30,共6页

摘　　要：对铸造Ｐｒ－Ｆｅ－Ｂ磁体进行了退火／热压和热压／退火两种工艺实验。研究了磁体在不同状态下的组织与磁性的关系。结果表明，Ｐｒ－Ｆｅ－Ｂ永磁合金的磁性能和微观组织结构有密切关系。细小、均匀的主相晶粒、平直的晶界、晶粒被非磁性相包围以及晶粒的Ｃ轴择尤取向可以获得高的磁性能。选用热压／退火工艺和适当的工艺参数可获得高磁性所要求的微观组织。Two kinds of experiment have been performed on a casting Pr-Fe-B alloy,an nealing followed by subsquent hot-pressing; and hot-pressing then annealing.The relation between the magnetic properties and microstructures has been investigated.The reSult shows that the magnetic properties of hot-pressed Pr-Fe-B permanent magnets are sensitive to the microstructures, Fine and homogeneous matrix grains ,straight boundary,the non-magnetic phases on boundaries surrounding grains and highly preferred C-axies orientation all are helpful to obtain the poxrfect magnetic properties.The optimum magnetic properties and related microstructures can be attained by hot-presSing as-east ingot and regutating technique paremeter.

关 键 词：永磁合金 铸造 热压 镨铁硼合金 显微组织 

分 类 号：TG132.27[一般工业技术—材料科学与工程]