DE673877C - Manufacture of permanent magnets - Google Patents

Manufacture of permanent magnets

Info

Publication number
DE673877C
DE673877C DEA67263D DEA0067263D DE673877C DE 673877 C DE673877 C DE 673877C DE A67263 D DEA67263 D DE A67263D DE A0067263 D DEA0067263 D DE A0067263D DE 673877 C DE673877 C DE 673877C
Authority
DE
Germany
Prior art keywords
manufacture
permanent magnets
alloys
cobalt
tungsten
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
DEA67263D
Other languages
German (de)
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.)
AEG AG
Original Assignee
AEG AG
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 AEG AG filed Critical AEG AG
Application granted granted Critical
Publication of DE673877C publication Critical patent/DE673877C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Hard Magnetic Materials (AREA)

Description

Herstellung von Dauermagneten Die Erfindung betrifft die Verwendung von Eisen-Kobalt-Wolfram/Molybdän-Sinterlegierungen für die Herstellung von Dauermagneten.Manufacture of Permanent Magnets The invention relates to the use of iron-cobalt-tungsten / molybdenum sintered alloys for the production of permanent magnets.

Eisen-Kobalt-Molybdän und Wolfram enthaltende Legierungen sind bereits bekannt, und zwar auch in den später beschriebenen Zusammnensetzungen. Für die Legierungszusammensetzung selbst wird daher kein Schutz beansprucht.Iron-cobalt-molybdenum and tungsten containing alloys are already there known, also in the compositions described later. For the alloy composition therefore no protection is claimed.

Derartige Legierungen, z. B. mit der Zusammensetzung 7 5 bis 8 o % Eisen, Io % Kobalt und I o bis i 5 % Wolfram oder Molybdän, hat mann bisher zu Stromeinführungsdrähten für Glasgefäße verwendet. Auch hat man schon erkannt, daß diese Legierungen ausscheidungshärtefähig sind und sich für die Herstellung von harten Schneidwerkzeugen oder verschleißfesten Werkzeugen eignen. Um die besten Gütewerte zu erzielen, hat man schließlich schon vorgeschlagen, die 2 bis 40 0/0 Wolfram und 2 bis 40% Kobalt, Nickel oder Mangan enthaltenden Eisenlegierungen auf Temperaturen über 9oo° C zu erhitzen, rasch abzukühlen und bei 4oo bis 8oo° C anzulassen. Auch für diese Wärmebehandlung wird daher kein Schutz beansprucht.Such alloys, e.g. B. with the composition 7 5 to 8 o% Iron, Io% cobalt and I o to I 5% tungsten or molybdenum have been used to make current feed wires used for glass vessels. It has also already been recognized that these alloys are precipitation hardenable are and are dedicated to the manufacture of hard cutting tools or wear-resistant Tools. After all, in order to achieve the best quality values, one already has suggested the 2 to 40 0/0 tungsten and 2 to 40% cobalt, nickel or manganese to heat containing iron alloys to temperatures above 900 ° C, to cool quickly and to be tempered at 4oo to 8oo ° C. There is therefore no for this heat treatment either Protection claimed.

Es wurde nun gefunden, daß die bekannten Legierungen, vorzugsweise solche der folgenden Zusammensetzungen 4o bis 6o%, insbesondere 47% Eisen, 20 - 30%, - 3o% Wolfram und/oder Molybdän und 2o - 3o%, insbesondere 23%o Kobalt nach der an sich bekannten Wärmebehandlung, die vorzugsweise in folgenden Stufen besteht: I- bis 2stündiges Sintern des aus den gepulverten Ausgangsstoffen gepreßten Formlings in einer reduzierenden Atmosphäre bei etwa i ¢oo bis i 5oo° C, Abschrecken und anschließendes, mindestens istündig:es Anlassen zwischen 6oo bis 700'C, Legierungen mit guten Dauermagiieteigenschaften ergeben,It has now been found that the known alloys, preferably those of the following compositions 4o to 6o%, especially 47% iron, 20 - 30%, - 3o% tungsten and / or molybdenum and 2o - 3o%, especially 23% o cobalt after the heat treatment known per se, which preferably consists of the following stages: sintering for 1 to 2 hours of the molding pressed from the powdered starting materials in a reducing atmosphere at about i oo to i 500 ° C., quenching and then, at least one hour: tempering between 600 to 700'C, result in alloys with good permanent magic properties,

Claims (1)

PATENTANSPRUCH: Die Verwendung ausscheidungshartefähiger Legierungen mit 40 bis 6o %, vorzugsweise 47% Eisen, 20 - 30 %, - 30 % Wolfram und/oder Molybdän, 2o - 3ö%, vorzugsweise 23 % Kobalt, die durch t- bis 2stündiges Sintern von aus gepulverten Ausgangsstoffen gepreßten, Formlingen in einer reduzierenden Atmosphäre bei I40o bis I500° C, Abschrecken und anschließendes, mindestens istündiges Anlassen auf 6oö bis 7000C erhalten wurden, für die Herstellung von Dauermagneten.PATENT CLAIM: The use of precipitation-hard alloys with 40 to 60%, preferably 47% iron, 20 - 30%, - 30% tungsten and / or molybdenum, 2o - 30%, preferably 23% cobalt, obtained by sintering for t to 2 hours powdered raw materials pressed, moldings in a reducing atmosphere at 140 ° to 1500 ° C, quenching and subsequent tempering for at least one hour at 600 to 7000 C for the manufacture of permanent magnets.
DEA67263D 1931-09-30 1932-09-28 Manufacture of permanent magnets Expired DE673877C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US673877XA 1931-09-30 1931-09-30

Publications (1)

Publication Number Publication Date
DE673877C true DE673877C (en) 1939-03-30

Family

ID=22075671

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA67263D Expired DE673877C (en) 1931-09-30 1932-09-28 Manufacture of permanent magnets

Country Status (1)

Country Link
DE (1) DE673877C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764858C (en) * 1939-09-06 1953-03-16 Hartmetallwerkzeugfabrik Meuts Process for the production of permanent magnets from iron-aluminum-nickel alloys

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764858C (en) * 1939-09-06 1953-03-16 Hartmetallwerkzeugfabrik Meuts Process for the production of permanent magnets from iron-aluminum-nickel alloys

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