DE932444C - Process for the production of permanent magnets - Google Patents

Process for the production of permanent magnets

Info

Publication number
DE932444C
DE932444C DEW2677D DEW0002677D DE932444C DE 932444 C DE932444 C DE 932444C DE W2677 D DEW2677 D DE W2677D DE W0002677 D DEW0002677 D DE W0002677D DE 932444 C DE932444 C DE 932444C
Authority
DE
Germany
Prior art keywords
permanent magnets
production
powder
aluminum
nickel
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
DEW2677D
Other languages
German (de)
Inventor
Franz Dr Skaupy
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.)
Deutsche Edelstahlwerke AG
Original Assignee
Deutsche Edelstahlwerke 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 Deutsche Edelstahlwerke AG filed Critical Deutsche Edelstahlwerke AG
Priority to DEW2677D priority Critical patent/DE932444C/en
Application granted granted Critical
Publication of DE932444C publication Critical patent/DE932444C/en
Expired 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
    • H01F1/06—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 in the form of particles, e.g. powder
    • H01F1/08—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 in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/086—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 in the form of particles, e.g. powder pressed, sintered, or bound together sintered

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Hard Magnetic Materials (AREA)

Description

Verfahren zur Herstellung von Dauermagneten Die Erfindung betrifft ein Verfahren zur Herstellung von Dauermagneten und besteht darin, daß ein Pulver aus Teilchen gesintert wird, die aus mindestens zwei konzentrischen Schichten verschiedener Metalle bestehen, z. B. innen Nickeleisen, außen Aluminium oder umgekehrt. Dabei wird man die Ausdehnungskoeffizienten so wählen, daß zwischen den beiden Schichten ein möglichst großer Unterschied besteht. Man wird z. B. innen einen Kern aus Nickeleisen mit etwa 361/o Nickelgehalt wählen, außen Aluminium, Kupfer oder Silber nehmen.Method of Making Permanent Magnets The invention relates to a method of making permanent magnets and consists in making a powder is sintered from particles composed of at least two concentric layers of different Metals exist, e.g. B. inside nickel iron, outside aluminum or vice versa. Included one will choose the expansion coefficient so that between the two layers there is as great a difference as possible. One will z. B. inside a core made of nickel iron Choose with about 361 / o nickel content, use aluminum, copper or silver on the outside.

Die Herstellung solcher konzentrisch aufgebauter Pulver kann etwa elektrisch geschehen (Verkupfern von Eisen-Nickel-Pulver) oder in der Gasphase (erhitztes Aluminiumpulver wird durch eine Mischung von Eisen- öder Nickel-Karbonyldampf fallen gelassen) u. dgl. mehr. Bei der Herstellung dieser Magnete kann auch ein weicheres Bindemetall beim Sintern zugesetzt werden, auch kann das Bindemittel selbst die äußere der konzentrischen Schichten der Pulverteilchen bilden.The production of such concentrically structured powders can for example done electrically (copper-plating of iron-nickel powder) or in the gas phase (heated Aluminum powder will fall through a mixture of iron or nickel-carbonyl vapor left) and the like more. A softer one can also be used in the manufacture of these magnets Binder metal can be added during sintering, and the binder itself can also die form outer ones of the concentric layers of the powder particles.

Sinterlegierungen der beschriebenen Art können entweder beim Sinterprozeß oder beim Abkühlen nach diesem einer Druckbeanspruchung ausgesetzt werden, beim Abkühlen auch einer Zugbeanspruchung, um die magnetischen Eigenschaften zu verbessern. Desgleichen können geeignete Wärmebehandlungen, wie Abschrecken und Anlassen, in den Herstellungsprozeß eingeschaltet werden.Sintered alloys of the type described can either be used in the sintering process or be subjected to compressive stress during cooling after this Cooling also a tensile stress in order to improve the magnetic properties. Suitable heat treatments, like quenching and tempering to be included in the manufacturing process.

Claims (1)

PATENTANSPRÜCHE: - i. Verfahren zur Herstellung von- Dauermagneten, dadurch gekennzeichnet, daß ein Pulver aus Teilchen, die aus mindestens zwei konzentrischen Schichten verschiedener Metalle bestehen, gesintert wird. z. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die verschiedenen Schichten sehr verschiedene Ausdehnungskoeffizienten besitzen. 3. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Pulverteilchen mit einem Kern aus Nickeleisen und einer Hülle aus Aluminium oder umgekehrt aufgebaut sind. q.. Verfahren nach Anspruch a, dadurch gekennzeichnet, daß die Pulverteilchen aus einem Kern aus Nickeleisen mit einem Nickelgehalt von etwa 36'/o und einer Hülle aus Aluminium oder Kupfer bestehen. 5. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Legierungen beim Sinterprozeß einer Druckbeanspruchung ausgesetzt werden. 6. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Legierungen beim Abkühlen nach dem Sinterprozeß einer Drucköder Zugbeanspruchung ausgesetzt werden.PATENT CLAIMS: - i. Process for the production of - permanent magnets, characterized in that a powder of particles consisting of at least two concentric Layers of different metals consist of sintering. z. Method according to claim i, characterized in that the various layers have very different coefficients of expansion own. 3. The method according to claim i, characterized in that the powder particles with a core made of nickel iron and a shell made of aluminum or vice versa are. q .. The method according to claim a, characterized in that the powder particles made of a core made of nickel iron with a nickel content of about 36% and a shell consist of aluminum or copper. 5. The method according to claim i, characterized in that that the alloys are exposed to compressive stress during the sintering process. 6. The method according to claim i, characterized in that the alloys on cooling subjected to compression or tensile stress after the sintering process.
DEW2677D 1943-03-10 1943-03-10 Process for the production of permanent magnets Expired DE932444C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW2677D DE932444C (en) 1943-03-10 1943-03-10 Process for the production of permanent magnets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW2677D DE932444C (en) 1943-03-10 1943-03-10 Process for the production of permanent magnets

Publications (1)

Publication Number Publication Date
DE932444C true DE932444C (en) 1955-09-01

Family

ID=7591707

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW2677D Expired DE932444C (en) 1943-03-10 1943-03-10 Process for the production of permanent magnets

Country Status (1)

Country Link
DE (1) DE932444C (en)

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