DE847467C - Permanent magnet made of steel powder and process for its manufacture - Google Patents

Permanent magnet made of steel powder and process for its manufacture

Info

Publication number
DE847467C
DE847467C DEK8667A DEK0008667A DE847467C DE 847467 C DE847467 C DE 847467C DE K8667 A DEK8667 A DE K8667A DE K0008667 A DEK0008667 A DE K0008667A DE 847467 C DE847467 C DE 847467C
Authority
DE
Germany
Prior art keywords
permanent magnet
powder
steel
steel powder
permanent 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.)
Expired
Application number
DEK8667A
Other languages
German (de)
Inventor
Eduard Dr-Ing Houdremont
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.)
Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Original Assignee
Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
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 Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie filed Critical Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Priority to DEK8667A priority Critical patent/DE847467C/en
Application granted granted Critical
Publication of DE847467C publication Critical patent/DE847467C/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

Description

Dauermagnet aus Stahlpulver und Verfahren zu seiner Herstellung Vs ist bekannt, I )muTutagnetr aus Reineisett- I@u@ver odrr einer Inlverförmigen Fisen-Kobalt- I.c9iCrutt9 ttlit 30010 Kobalt herzustellen. Diese Dauermagnete zeigen beachtliche Gütewerte, ins- dann, wenn Pulver mit einer Korngrüße von weniger als t p verwendet wird. I )ctt Gegenstand der Mündung Bildet ein Dauer utagnet. cler aus im niartunsitischen Zustand betind- lichcnt fcink@@rnigem Stahlpulver besteht, das, z. B. durch Pressen. in die gewünschte Form gebracht w@>r@lett ist. Die magnetischen Eigenschaften dieses 1 >auerniagttets sind tutclt Kesser als die der aus Rehe oder oder eitler Indverförmigen Eisen-Kohalt- Legteruttg hergestellten Daucrtnagnete. Die Erh<i- Itttttg der Kouurzitivkräfte ist eine Folge der \'adAstruktur des \Iartensits, der die Formani- sotropie der Pulverkörner in magnetisch günstiger Weise ct-li<ilit. 1>ie Hernelltmg des Mahlpulvers, das z. Il aus <-hier Fiseu-Koldenstoff-Legierung mit etwa o,i bis i °/o Kohlenstoff bestehen kann und vorzugsweise eine Korngröße von weniger als i ic aufweist, kann in au sich helmnmer Mleise erfolgen. Beispielsweise kann die sogenannte Raneymethode artgewandt wer den. die auch für die Herstellung des eingangs er- w;ilutten feinstkörnigen Eisenpulvers vorgeschlagen worden ist und die darin besteht, aus einer Eisen- Alunlinium-Legierung das Aluminium atlsztllatlgc#tl. Zur l Irrstellung von Stahlpulver für Dauermagnete nach der l,.t-ftidting geht man dabei von einer kohl:ti- stoffhaltigen Eisen-Altuniniuni-Legierung aus. llan kann aber auch Stahlpulver für Dauermagnete nach der Erfindung in der Weise herstellen, daß man dünnste Drähte oder Bänder, vorzugsweise in Stärken unter i Al herstellt, diese durch Härten in den martensitischen "Zustand bringt und alsdann mechanisch zerkleinert. Die Drähte oder Bänder können aus Stahl oder Weicheisen hergestellt werden: ini letzteren Fall werden sie in bekannter Weise im festen Zustand bei erhöhter Temperatur aufgekohl t.Permanent magnet made of steel powder and its method of manufacture Vs is known, I) muTutagnetr from Reineisett- I @ u @ ver odrr an inlver-shaped fisen-cobalt I.c9iCrutt9 ttlit 30010 cobalt manufacture. These Permanent magnets show considerable quality values, especially then if powder with a grain size of less than tp is used. I) ctt object of the mouth Forms a duration utagnet. from being betind- lichcnt fcink @@ granular steel powder that, e.g. B. by pressing. brought into the desired shape w @> r @ lett is. The magnetic properties of this 1> Auerniagttets are tutclt kesser than those from deer or or vain indveriform iron-carbon Permanent magnets manufactured by Legteruttg. The increase Itttttg the kouurzitive forces is a consequence of the \ 'adA structure of \ Iartensit, which the formani sotropy of the powder grains in magnetically more favorable Way ct-li <ilit. 1> The Hernelltmg of the grinding powder, the z. Il out <- here Fiseu-Koldenstoff alloy with about o, i to i ° / o may and preferably consist of carbon has a grain size of less than i ic, can take place in a helmnmer Mleise. For example the so-called Raney method can be applied the. which are also used for the production of the entrance w; ilutten fine-grained iron powder is suggested and which consists of an iron Alunlinium alloy the aluminum atlsztllatlgc # tl. For misleading steel powder for permanent magnets according to the l, .t-ftidting, one assumes a kohl: ti- material-containing iron-Altuniniuni alloy. But Ilan can also produce steel powder for permanent magnets according to the invention in such a way that the thinnest wires or bands, preferably in thicknesses below i Al, are made, brought into the martensitic state by hardening and then mechanically comminuted. The wires or bands can be made from Steel or soft iron are produced: in the latter case they are carburized in a known manner in the solid state at elevated temperature.

Die Formgebung der Dauermagnete nach der I?rhndung kann so erfolgen. daß das Pulver mit (der ohne Verwendung eines Bindeinittcls in die gewiinschte Forin gepreßt wird.The permanent magnets can be shaped in this way after the rounding. that the powder with (without the use of a binder in the desired shape is pressed.

Claims (1)

PATENTANSPRÜCHE: Aus feinkörnigem Pulver bestehender Dauermagnet, dadurch gekennzeichnet, daß er aus im martensitischen Zustand befindlichem Stahlpulver besteht, das: z. 13. durch Pressen. in die gewünschte Form gebracht worden ist. ?. Dauermagnet nach Anspruch i, dadurch gekemmeichnet. daß die hliriigröße des Stahl lndvers kleiner ist als t i(. 3. X-erfaliren zur Herstellung eines Dauer- magnets nach Anspruch t und 2. dadurch ge- kennzeichnet, daß einer kilhlenstottlialtigen Eisen-Aluminiutii-Legierung durch Auslaugen das Aluminium entzogen iuld aus dein eiltste- henden Stahlpulver der I>auermagnetkörpei- geformt wird. Wrfahren zur 1Terstellung eines Dauer- magnets nach Anspruch i und 2, dadurch ge- kennzeichnet, . daß dünne Stahldrähte oder -häuder, vorzugsweise solche niit eüwr Dicke von weniger als i ie, durch Härten in den niarten- sitischen Zustand übergeführt und mechanisch zerkleinert werden und daß aus dem so her- gestellten Pulver der Dauermagnetkörper ge- formt wird. \-erfahren nach Anspruch .l, dadurch ge- kennzeiclmet, daß die Stahldrähte oder -händer aus Weicheisen hergestellt und auffekohlt werden.
PATENT CLAIMS: A permanent magnet consisting of fine-grain powder, characterized in that it consists of steel powder in the martensitic state, which: z. 13. by pressing. has been brought into the desired shape. ?. Permanent magnet according to claim i, characterized clamped. that the size of the steel lndvers is smaller than ti (. 3. X successes to create a permanent magnets according to claim t and 2. indicates that a kilhlenstottlialtigen Iron-aluminum alloy by leaching the aluminum withdrawn from your hurried existing steel powder of the non-magnetic body is shaped. Procedure for 1 creation of a permanent magnets according to claim i and 2, characterized indicates. that thin steel wires or -houses, preferably those with a thickness of less than i ie, by hardening in the niarten- physical state and mechanically are crushed and that from the so- powder made of the permanent magnet body is formed. -experienced according to claim .l, thereby mark that the steel wires or hands made of soft iron and carburized will.
DEK8667A 1951-01-16 1951-01-16 Permanent magnet made of steel powder and process for its manufacture Expired DE847467C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK8667A DE847467C (en) 1951-01-16 1951-01-16 Permanent magnet made of steel powder and process for its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK8667A DE847467C (en) 1951-01-16 1951-01-16 Permanent magnet made of steel powder and process for its manufacture

Publications (1)

Publication Number Publication Date
DE847467C true DE847467C (en) 1952-08-25

Family

ID=7212064

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK8667A Expired DE847467C (en) 1951-01-16 1951-01-16 Permanent magnet made of steel powder and process for its manufacture

Country Status (1)

Country Link
DE (1) DE847467C (en)

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