DE720329C - Process for improving the permanent magnet properties of iron-nickel-aluminum alloys that can be achieved by subsequent magnetization - Google Patents

Process for improving the permanent magnet properties of iron-nickel-aluminum alloys that can be achieved by subsequent magnetization

Info

Publication number
DE720329C
DE720329C DEB170079D DEB0170079D DE720329C DE 720329 C DE720329 C DE 720329C DE B170079 D DEB170079 D DE B170079D DE B0170079 D DEB0170079 D DE B0170079D DE 720329 C DE720329 C DE 720329C
Authority
DE
Germany
Prior art keywords
permanent magnet
improving
nickel
iron
aluminum alloys
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
DEB170079D
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DEB170079D priority Critical patent/DE720329C/en
Application granted granted Critical
Publication of DE720329C publication Critical patent/DE720329C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/06—Special casting characterised by the nature of the product by its physical properties
    • 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

Description

Verfahren zur Verbesserung der durch nachfolgendes Magnetisieren erreichbaren Dauermagneteigenschaften von Eisen-Nickel-Aluminium-Legierungen Gegenstand des Hauptpatents 712 326 ist die Verwendung einer Sandform mit den eigentlichen Formenhohlraum teilweise oder ganz begrenzenden metallenen Einlagen zum Gießen von Werkstücken zum Herstellen von Dauermagneten aus den hierfür geeigneten L egierungen auf j er Grundlage Eisen-Nickel-Aluminium.A method for improving the achievable by subsequently magnetizing the permanent magnet properties of the iron-nickel-aluminum alloys subject of the main patent 712 326 is the use of a sand mold with the actual mold cavity partially or wholly limiting metal inserts for casting of workpieces for the manufacture of permanent magnets made suitable for this purpose L Alloys based on iron-nickel-aluminum.

Die vorliegende Erfindung betrifft ein solches Verfahren zur Verbesserung der durch nachfolgendes Magnetisieren erreichbaren Dauermagneteigenschaften von zu Dauermagneten verwendbaren Eisen-Nickel-Aluminium-Legierungen durch Gießen.The present invention relates to such a method of improvement the permanent magnet properties of iron-nickel-aluminum alloys that can be used for permanent magnets by casting.

Es wurde festgestellt, daß die bei Verwendung einer nach. dem Hauptpatent ausgestatteten Sandform erzielte Abkühlungsgeschwindigkeit in manchen Fällen, insbesondere bei der Herstellung von Magneten mit größeren Abmessungen, noch nicht genügend hoch ist, um das Gußstück im Zustande bester magnetischer Eigenschaften zu erhalten. In solchen Fällen soll nun gemäß der Erfindung eine Sandform verwendet werden, bei welcher die den eigentlichen Formhohlraum ganz oder teilweise begrenzenden Metalleinlagen zwecks Durchleitung eines Kühlmittels als Hohlkörper ausgebildet sind. Im allgemeinen empfiehlt es sich, diejenigen Metalleinlagen als Hohlkörper auszubilden, die einfacher Gestalt sind, z. B. Platten. Solche Hohlplatten werden zweckmäßigerweise am Boden der Gießform oder oberhalb des eigentlichen Formenhohlraumes angebracht.It has been found that when using an after. the main patent equipped sand mold achieved cooling rate in some cases, in particular in the production of magnets with larger dimensions, not yet high enough is to keep the casting in the state of the best magnetic properties. In such cases, a sand mold should now be used according to the invention which completely or partially delimits the actual mold cavity are designed as a hollow body for the purpose of passing a coolant through. In general it is advisable to design those metal inserts as hollow bodies that are simpler Are shape, e.g. B. Plates. Such hollow slabs are expediently on the ground attached to the casting mold or above the actual mold cavity.

Als Kühlmittel kann eine Flüssigkeit, z. B. Wasser, oder Preßluft verwendet werden. Wenn es erwünscht ist, kann das Durchleiten des Kühlmittels während der Erkaltung des Gußstücks unterbrochen werden.As a coolant, a liquid, e.g. B. water, or compressed air be used. If desired, coolant can be passed through during the cooling of the casting are interrupted.

Es ist bekannt, zur Herstellung von an der Oberfläche harten Werkstücken, z. B. Kaliberwalzen, metallene Gießformen zu verwenden, die als gekühlte Hohlkörper ausgebildet sind, oder zum gleichen Zweck in einer Sandform metallene Hohlkörper in geeigneter Weise anzuordnen.It is known for the production of workpieces that are hard on the surface, z. B. caliber rolls to use metal casting molds as a cooled hollow body are formed, or for the same purpose in a sand mold metal hollow body to be arranged in a suitable manner.

Bei dem Verfahren nach der Erfindung wird im Gegensatz zum Ziel dieser bekannten Oberflächenbehandlungsmethoden erstrebt und erreicht, daß die gegossenen Werkstücke bereits unmittelbar nach dem Guß, d. h. ohne zusätzliche Wärmnebehanälung, einen Zustand aufweisen, in dem sie bei nachfolgendem Magnetisieren besonders hohe Gütewerte annehmen.In the method according to the invention, in contrast to the aim, this seeks known surface treatment methods and achieved that the cast Workpieces immediately after casting, d. H. without additional heat treatment, have a state in which they are particularly high upon subsequent magnetization Accept quality values.

Claims (1)

PATENTANSPRUCH: Verfahren zur Verbesserung der durch nachfolgendes Magnetisieren erreichbaren Dauermagneteigenschaften von zu Dauermagneten verwendbaren Eisen-Nick@el-Alumit,ium-Legierungen durch Gießen gemäß Patent 71--326, dadurch gekennzeichnet. daß die den eigentlichen Formhohlraum ganz oder teilweise begrenzender, Metalleinlagen zwecks Durchleitung eines Kühlmittels als Hohlkörper ausgebildet sind.PATENT CLAIM: Process for improving the by the following Magnetizing achievable permanent magnet properties of usable to permanent magnets Eisen-Nick @ el-Alumit, ium alloys by casting according to patent 71-326, thereby marked. that the actual mold cavity completely or partially delimiting, Metal inserts designed as a hollow body for the purpose of passing a coolant through are.
DEB170079D 1935-06-15 1935-06-15 Process for improving the permanent magnet properties of iron-nickel-aluminum alloys that can be achieved by subsequent magnetization Expired DE720329C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB170079D DE720329C (en) 1935-06-15 1935-06-15 Process for improving the permanent magnet properties of iron-nickel-aluminum alloys that can be achieved by subsequent magnetization

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB170079D DE720329C (en) 1935-06-15 1935-06-15 Process for improving the permanent magnet properties of iron-nickel-aluminum alloys that can be achieved by subsequent magnetization

Publications (1)

Publication Number Publication Date
DE720329C true DE720329C (en) 1942-05-05

Family

ID=7006471

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB170079D Expired DE720329C (en) 1935-06-15 1935-06-15 Process for improving the permanent magnet properties of iron-nickel-aluminum alloys that can be achieved by subsequent magnetization

Country Status (1)

Country Link
DE (1) DE720329C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE965885C (en) * 1951-11-13 1957-06-27 Magnetfabrik Gewerkschaft Wind Process for the production of permanent magnets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE965885C (en) * 1951-11-13 1957-06-27 Magnetfabrik Gewerkschaft Wind Process for the production of permanent magnets

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