热压温度及热处理对铸造-热变形Nd-Fe-B永磁合金组织的影响  

Influence of Hot-pressing Temperature and Heat Treatment on Microstructure of Hot-pressing Cast Nd-Fe-B Permanent Magnetic Alloys

作　　者：计云萍[1] 任慧平[1] 谢淼舟[2] 潘英旭 赵殿平 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]包头钢铁(集团)有限责任公司设计院,内蒙古包头014010

出　　处：《稀土》2008年第2期20-24,共5页Chinese Rare Earths

基　　金：内蒙古科技攻关项目(20020202);教育部科学技术研究重点项目(地方02031)

摘　　要：研究了热压温度和热处理对铸造-热压变形Nd-Fe-B永磁合金显微组织的影响,采用金相显微镜和扫描电镜观察显微组织。结果表明,经过固溶处理Nd-Fe-B合金由主相Nd2Fe14B和富Nd相两相组成;较低的热压温度更为适用;热压后的热处理可以改善热压变形Nd-Fe-B永磁合金的边界显微结构。为最终获得高性能的热变形Nd-Fe-B永磁体提供了理论依据。Influence of hot- pressing temperature and heat treatment on the microstructure of hot - pressing cast Nd-Fe-B permanent magnetic alloys was studied. The microstmcture was studied by ZEISS - 25CA metallographic microscope and KYKY - 1000B scanning electron microscope. The results show that Nd - Fe - B alloys is composed of Nd2Fe14B and Nd - rich phrases after solid solution annealing treatment, lower hot - pressing temperature is much more applicable and heat treatment after hot- pressing deformation can improve the boundary microstructure of hot - pressing Nd - Fe - B permanent magnetic alloys. It can probably provide theo- retical references for finally obtaining the high performance hot- deformed Nd- Fe- B permanent magnets.

关 键 词：ND-FE-B 稀土永磁 热变形 热处理 

分 类 号：TG132.272[一般工业技术—材料科学与工程]