CN85104348B - 温度补偿的2-17型稀土永磁材料的制造方法 - Google Patents

温度补偿的2-17型稀土永磁材料的制造方法 Download PDF

Info

Publication number
CN85104348B
CN85104348B CN85104348A CN85104348A CN85104348B CN 85104348 B CN85104348 B CN 85104348B CN 85104348 A CN85104348 A CN 85104348A CN 85104348 A CN85104348 A CN 85104348A CN 85104348 B CN85104348 B CN 85104348B
Authority
CN
China
Prior art keywords
stove
compensation
ranges
chilled
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CN85104348A
Other languages
English (en)
Other versions
CN85104348A (zh
Inventor
王家海
常克
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baotou Institute Of Metallurgy Ministry Of Metallurgical Industry
Original Assignee
Baotou Institute Of Metallurgy Ministry Of Metallurgical Industry
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baotou Institute Of Metallurgy Ministry Of Metallurgical Industry filed Critical Baotou Institute Of Metallurgy Ministry Of Metallurgical Industry
Priority to CN85104348A priority Critical patent/CN85104348B/zh
Publication of CN85104348A publication Critical patent/CN85104348A/zh
Publication of CN85104348B publication Critical patent/CN85104348B/zh
Expired legal-status Critical Current

Links

Landscapes

  • Hard Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)

Abstract

在2-17型Sm(Co、Cu、Fe、Zr)7.4永磁合金中,添加Gd替代部分Sm,其结构式为Sm1-xGdm(Co、Cu、Fe、Zr)7.4,x=0.2-0.4,合金元素重量百分比为Co45~47%、Cu6%、Fe16-18%、Zr2-3%,余量为Sm和Gd。采用三段烧结,温度范围分别为1200~1220℃、1205~1230℃、1175~1200℃,之后空冷至室温;830℃保温12~15小时的等温处理;以及随炉冷至800℃保温30分钟,再随炉冷至600℃保温2小时,最后随炉冷至400℃出炉空冷的时效处理。磁体性能达如下指标:Br=8800-9600Gs,BHc=8000-8600Oe,JHc≥15000Oe,(BHmax=18-21MGOe。在20~120℃范围内,开路磁感应强度平均可逆温度系数为-0.007~-0.012%/℃。

Description

温度补偿的2-17型稀土永磁材料的制造方法
本发明是介绍一种具有温度补偿的低温度系数稀土永磁材料的制造方法。
低温度系数永磁材料,广泛地用于行波管、微波管、惯性导航陀螺仪、加速度表和其它高精度仪表等器件,在目前国际新技术革命和我国国防现代化建设中,具有重要意义。
自六十年代末以来,具有高磁能积、高矫顽力的稀土永磁致料得到迅速发展,但由于平均可逆温度系数较高(α=-0.035~-0.126%/℃,-60~100℃),大大限制了在某些领域的应用。为此,对某些器件不得不采用软磁材料分流补偿的办法,来消除因温度变化给器件带来的不稳定性,这种分流补偿,不仅技术复杂,而且增加了成本和器件的重量,为降低温度系数,有关学者和专家,利用组成材料各元素的固有物理特性,研制出具有温度补偿的稀土永磁体。通常以Gd或Er、Ho等重稀土元素替代部分稀土永磁体中的Sm,例如,在2-17型永磁体中添加金属Er,磁能积达15~23MGOe(K.J.Strnat,H.F.Mildaum et al,7 th Int'l,Workhop Rare Earth-Co Perm Mag.China.Sep.1983);在2-17型永磁体中添加Gd,磁能积为14MGOe(JP昭59-118846,JP昭59-35648),由于采用的制造工艺所限,不能获得高剩磁、高磁能积稀土永磁材料。
本发明的目的在于为获得具有温度补偿的高矫顽力和高磁能积的永磁材料而寻找一种特殊的工艺制度。
发明人在2-17型Sm(Co、Cu、Fe、Zr)7.4永磁体中,添加金属Gd替代部份Sm,其结构式为Sm1-xGdx(Co、Cu、Fe、Zr)7
.4=0.2~0.4;合金元素的重量百分比:Co45~47%,Cu6%,Fe16~18%,Zr2~3%,余量为Sm和Gd。
发明的要点是热处理工艺进行三段烧结,温度范围分别是1200~1220℃、1205~1230℃、1175~1200℃,之后空冷至室温;在830℃,保温12~15小时,进行等温处理;之后随炉冷至800℃,保温30分钟,再随炉冷至600℃,保温2小时,接着随炉冷至400℃出空冷。
附图为烧结和热处理工艺示意图,图中1为第一段烧结,温度1200~1220℃;2为第二段烧结,温度1205~1230℃;3为第三段烧结,温度1175~1200℃;4为等温处理,830℃保温12~15小时;5为第一段分级时效,温度800℃,保温30分钟;6为等二段分级时效,温度600℃保温2小时,随炉冷至400℃,出炉空冷。
本发明与加Er的2~17型稀土永磁体相比,添加元素Gd资源丰富,价格低廉易于推广应用;与加Gd的相比,大大提高稀土永磁体的剩磁和磁能积。三段烧结和简化的时效处理,保证了产品性能,并缩短了生产周期。
发明人在中频感应炉中用氧化铝坩埚,进行过合金冶炼(2~4公斤/炉),合金料入炉后,炉体真空度达2×10-3mmHg时,充氩气保护熔炼,合金浇注在水冷铜模中。制粉以甲苯为介质,滚动球磨,合金粉末粒度为5~7μ;样品(或产品)在12KOe直流电磁铁磁场中取向模压成型,经三段烧结(温度范围1175~1230℃)后空冷至室温,在830℃保温12小时等温处理,之后随炉冷至800℃保温30分钟,再随炉降至400℃时,出炉空冷,其磁性能为:Br=8800~9600Gs,BHC=8000~8600 Oe,jHo≥15000Oe,(BH)mas=18~21MGOe,在20~120℃范围内,平均可逆温度系数α=-0.007~-0.012%/℃(开路磁感应强度)。

Claims (6)

1、一种结构式为Sm1-xGdx(Co、Cu、Fe、Zr)7.4=0.2-0.4,合金元素重量百分比为Co45-47%、Cu6%、Fe16-18%、Zr2-3%,余量是Sm和Gd的稀土永磁材料的制造方法,其特征在于包括下列步骤:
a.进行三段烧结,温度范围分别是1200~1220℃,1205~1230,1175~1200℃,之后空冷至室温,
b.在830℃保温12~15小时,进行等温处理,
c.之后随炉冷至800℃,保温30分钟,
d.再随炉冷至600℃,保温2小时,
e.接着随炉冷至400℃,出炉空冷。
CN85104348A 1985-06-03 1985-06-03 温度补偿的2-17型稀土永磁材料的制造方法 Expired CN85104348B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN85104348A CN85104348B (zh) 1985-06-03 1985-06-03 温度补偿的2-17型稀土永磁材料的制造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN85104348A CN85104348B (zh) 1985-06-03 1985-06-03 温度补偿的2-17型稀土永磁材料的制造方法

Publications (2)

Publication Number Publication Date
CN85104348A CN85104348A (zh) 1987-05-13
CN85104348B true CN85104348B (zh) 1988-10-19

Family

ID=4793786

Family Applications (1)

Application Number Title Priority Date Filing Date
CN85104348A Expired CN85104348B (zh) 1985-06-03 1985-06-03 温度补偿的2-17型稀土永磁材料的制造方法

Country Status (1)

Country Link
CN (1) CN85104348B (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101882494A (zh) * 2010-05-17 2010-11-10 中国科学院宁波材料技术与工程研究所 一种钐钴系烧结磁体材料及其制备方法
CN105355352B (zh) * 2015-12-14 2018-06-29 成都银河磁体股份有限公司 一种低矫顽力的钐钴磁体及其制备方法

Also Published As

Publication number Publication date
CN85104348A (zh) 1987-05-13

Similar Documents

Publication Publication Date Title
Strnat et al. Rare earth-cobalt permanent magnets
US3684593A (en) Heat-aged sintered cobalt-rare earth intermetallic product and process
US3560200A (en) Permanent magnetic materials
CN113903587B (zh) 一种高温2:17型烧结钐钴磁体的制备方法
EP0650634B1 (en) Magnetic materials and method of making them
JPH06942B2 (ja) 希土類永久磁石
Satyanarayana et al. Magnetic properties of substituted Sm2Co17− xTx compounds (T= V, Ti, Zr, and Hf)
EP0453270B1 (en) Rare-earth based magnetic materials, production process and use
WO1980002297A1 (en) Process for producing permanent magnet alloy
JPH01219143A (ja) 焼結永久磁石材料とその製造方法
CN85104348B (zh) 温度补偿的2-17型稀土永磁材料的制造方法
US4854979A (en) Method for the manufacture of an anisotropic magnet material on the basis of Fe, B and a rare-earth metal
US3755007A (en) Stabilized permanent magnet comprising a sintered and quenched body of compacted cobalt-rare earth particles
Benz et al. Initial Observations: Cobalt‐Mischmetal‐Samarium Permanent Magnet Alloys
CN1025125C (zh) 铁-稀土基磁致冷材料及制备方法
Green et al. Low cobalt CrCoFe and CrCoFe-X permanent magnet alloys
Gould Permanent magnets
JP6960527B2 (ja) 永久磁石材料の処理方法
JPS60194502A (ja) 永久磁石材料の製造方法
EP0774762B1 (en) Temperature stable permanent magnet
JPS646267B2 (zh)
JPH0380508A (ja) 希土類磁石の製造方法
JPS58136757A (ja) 永久磁石合金の製造方法
JPS63234503A (ja) 永久磁石の製造方法
EP0242283B1 (en) A rare earth-based alloy for permanent magnet

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
C13 Decision
GR02 Examined patent application
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee
C17 Cessation of patent right
CX01 Expiry of patent term