WO1991014272A1 - Verfahren zum herstellen von se-dauermagneten - Google Patents

Verfahren zum herstellen von se-dauermagneten

Info

Publication number
WO1991014272A1
WO1991014272A1 PCT/DE1991/000174 DE9100174W WO9114272A1 WO 1991014272 A1 WO1991014272 A1 WO 1991014272A1 DE 9100174 W DE9100174 W DE 9100174W WO 9114272 A1 WO9114272 A1 WO 9114272A1
Authority
WO
WIPO (PCT)
Prior art keywords
wet
blanks
magnetic field
pressed
magnets
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.)
Ceased
Application number
PCT/DE1991/000174
Other languages
German (de)
English (en)
French (fr)
Inventor
Sevi Gaiffi
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.)
Magnetfabrik Schramberg & Co GmbH
Original Assignee
Magnetfabrik Schramberg & Co GmbH
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 Magnetfabrik Schramberg & Co GmbH filed Critical Magnetfabrik Schramberg & Co GmbH
Priority to JP91504183A priority Critical patent/JPH05506750A/ja
Publication of WO1991014272A1 publication Critical patent/WO1991014272A1/de
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0576—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together pressed, e.g. hot working
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling

Definitions

  • the invention relates to a process for the manufacture of SE permanent magnets, in which the ground constituents of the underlying alloy are wet-ground in solvents, in which the wet-ground stillage is dried and pressed into blanks with alignment in a magnetic field, in which the blanks are closed
  • Raw magnets are sintered and the permanent magnets made from the raw magnets are magnetized.
  • Such a method is known from EP 0 126 802 B1 and EP 0 177 371 A1.
  • the wet stillage is dried in a drying press in a separate drying process before pressing.
  • a high pressing pressure of about 1 t / cm 2 to 3 t / cm 2 must be applied and the alignment requires a magnetic field of about 0.8 to 1.4 Tesla.
  • the high press pressure requires expensive press devices and dies.
  • the aligned or aligned particles are damaged, for example bent, during pressing, which leads to a deterioration in the magnetic properties.
  • REPLACEMENT LEAF Press pressure and a strong magnetic field are used, which correspond to the above values in the manufacture of SE permanent magnets in the dry pressing process.
  • This object is achieved according to the invention in that the stillage is pressed into blanks in a wet press with alignment in the magnetic field, the pressing pressure being approximately half the pressing pressure required for dry pressing and the magnetic field for aligning approximately 50 to 60% of that for the alignment of dry-pressed blanks used magnetic field, and that the wet pressed and aligned blanks are sintered into raw magnets.
  • 0.2 to 0.3% by weight of distilled water can be added to the mixed constituents of the alloy.
  • the new process has proven itself in SEFeB permanent magnets that use Nd and / or Pr as SE and can also contain cobalt (Co) as an additional component.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Hard Magnetic Materials (AREA)
PCT/DE1991/000174 1990-03-09 1991-02-28 Verfahren zum herstellen von se-dauermagneten Ceased WO1991014272A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP91504183A JPH05506750A (ja) 1990-03-09 1991-02-28 Ｓｅ―永久磁石の製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4007534.6 1990-03-09
DE19904007534 DE4007534C1 (https=) 1990-03-09 1990-03-09

Publications (1)

Publication Number Publication Date
WO1991014272A1 true WO1991014272A1 (de) 1991-09-19

Family

ID=6401822

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1991/000174 Ceased WO1991014272A1 (de) 1990-03-09 1991-02-28 Verfahren zum herstellen von se-dauermagneten

Country Status (4)

Country Link
EP (1) EP0518890A1 (https=)
JP (1) JPH05506750A (https=)
DE (1) DE4007534C1 (https=)
WO (1) WO1991014272A1 (https=)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61114505A (ja) * 1984-11-09 1986-06-02 Hitachi Metals Ltd 永久磁石の製造方法
JPS61208808A (ja) * 1985-03-13 1986-09-17 Hitachi Metals Ltd 焼結磁石の製造方法
EP0386472A2 (en) * 1989-02-08 1990-09-12 SPS TECHNOLOGIES, Inc. Process for producing rare earth-iron-boron-type permanent magnets

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601875A (en) * 1983-05-25 1986-07-22 Sumitomo Special Metals Co., Ltd. Process for producing magnetic materials
JPS6187825A (ja) * 1984-10-05 1986-05-06 Hitachi Metals Ltd 永久磁石材料の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61114505A (ja) * 1984-11-09 1986-06-02 Hitachi Metals Ltd 永久磁石の製造方法
JPS61208808A (ja) * 1985-03-13 1986-09-17 Hitachi Metals Ltd 焼結磁石の製造方法
EP0386472A2 (en) * 1989-02-08 1990-09-12 SPS TECHNOLOGIES, Inc. Process for producing rare earth-iron-boron-type permanent magnets

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
E.P.WOHLFARTH ET AL.: "FERROMAGNETIC MATERIALS" VOL4" 1988, ELSEVIER, NL,AMSTERDAM,NORTH HOLLAND siehe Seite 76, Absatz 3 *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 297 (E-444)(2353) 09 Oktober 1986, & JP-A-61 114505 (HITACHI METALS LTD) 02 Juni 1986, siehe das ganze Dokument *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 46 (E-479)(2493) 12 Februar 1987, & JP-A-61 208808 (HITACHI METALS LTD) 17 September 1986, siehe das ganze Dokument *

Also Published As

Publication number Publication date
DE4007534C1 (https=) 1991-08-29
JPH05506750A (ja) 1993-09-30
EP0518890A1 (de) 1992-12-23

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