DE891626C - Process for the production of magnetogram carriers - Google Patents

Process for the production of magnetogram carriers

Info

Publication number
DE891626C
DE891626C DEST3454A DEST003454A DE891626C DE 891626 C DE891626 C DE 891626C DE ST3454 A DEST3454 A DE ST3454A DE ST003454 A DEST003454 A DE ST003454A DE 891626 C DE891626 C DE 891626C
Authority
DE
Germany
Prior art keywords
production
ferritic
chromium
steels
magnetogram
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
DEST3454A
Other languages
German (de)
Inventor
Carl August Dr-Ing Duckwitz
Erwin May
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.)
STAHLWERK ERGSTE AG
Original Assignee
STAHLWERK ERGSTE 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 STAHLWERK ERGSTE AG filed Critical STAHLWERK ERGSTE AG
Priority to DEST3454A priority Critical patent/DE891626C/en
Application granted granted Critical
Publication of DE891626C publication Critical patent/DE891626C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/642—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent self supporting magnetic material, e.g. magnetisable wires

Landscapes

  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Description

Verfahren zum Herstellen von Magnetogrammträgern zum Herstellen von Magnetogrammträgern in Form von Drähten oder Bändern wird vorwiegend von Legierungen auf Basis Eisen-Chrom-Nickel und Eisen-Chrom-Mangan ausgegangen. Dabei macht man sich die Eigenschaft dieser instabil austenitischen Stähle nutzbar, daB sie nach Kaltverformung bei Raumtemperatur teilweise martensitisch und damit magnetisierbar werden. Bekannt sind auch Magnetogrammträger mit auf einem Trägerband aufgebrachten Gemischen von Eisenoxyden sowie solche aus niedriglegierten Kobalt-Magnetstählen und Eisen-Nickel-Kupfer-Legierungen.Process for the production of magnetogram carriers for the production of Magnetogram carriers in the form of wires or ribbons are predominantly made of alloys based on iron-chromium-nickel and iron-chromium-manganese. You do it The property of these unstable austenitic steels can be used because they Cold deformation at room temperature is partially martensitic and therefore magnetizable will. Magnetogram carriers with applied to a carrier tape are also known Mixtures of iron oxides and those made from low-alloy cobalt magnetic steels and iron-nickel-copper alloys.

Eingehende Versuche hatten nun das überraschende Ergebnis, daB man die Grundlage für das Herstellen von Magnetogrammträgern in Draht- oder Bandform dadurch erheblich erweitern und wirtschaftlicher gestalten kann, daB als Werkstoff für diesen zweck nichtrostende, ferritische und ferritisch-perlitische Chromstähle Verwendung finden. Diese Stähle sind bekanntlich bereits im geglühten oder entspannten zustand ferromagnetisch. Es ergab sich, daB die magnetischen Eigenschaften der Stähle durch eine starke Kaltverformung so gesteigert werden können, daB aus den ferritischen bzw. ferritisch-perlitischen Chromstählen Magnetogrammträger hergestellt werden können, deren Eigenschaften denjenigen der bisher bekannten Magnetogrammträger kaum nachstehen.Thorough experiments had the surprising result that one the basis for the production of magnetogram carriers in wire or ribbon form can thereby expand considerably and make it more economical that as a material for this purpose stainless, ferritic and ferritic-pearlitic chromium steels Find use. As is well known, these steels are already in the annealed or stress-relieved state state ferromagnetic. It was found that the magnetic properties of the steels can be increased by strong cold deformation in such a way that the ferritic or ferritic-pearlitic chromium steels magnetogram carriers are produced can, whose properties hardly match those of the previously known magnetogram carriers lag behind.

Demnach geht der Vorschlag nach dieser Erfindung dahin, zum Herstellen von Magnetogrammträgern in Draht- oder Bandform ferritische oder ferritisch-perlitische Chromstähle zu verwenden mit bis zu i0/, Kohlenstoff, bis 2,5 °% Nickel, bis 25 °/o Chrom und im Rest Eisen und die üblichen Verunreinigungen, und diese Stähle dergestalt auf Bänder oder Drähte zu verarbeiten, daB sie nach einer Kaltverformung von mindestens 50 %, vorzugsweise aber von mehr als 7o °%, auf das Fertigmaß der Magnetogrammträger gebracht werden.Accordingly, the proposal according to this invention is to use ferritic or ferritic-pearlitic chromium steels with up to 10 % carbon, up to 2.5 % nickel, up to 25 % chromium and im Remaining iron and the usual impurities, and processing these steels on strips or wires in such a way that they are brought to the finished size of the magnetogram carrier after cold deformation of at least 50%, but preferably more than 70%.

Zur Verbesserung der magnetischen Eigenschaften ist es zweckmäßig, an die Kaltverformungsstufe eine Wärmebehandlung der Drähte oder Bänder bei Temperaturen von 3oo bis 7oo° C anzuschließen.To improve the magnetic properties, it is advisable to a heat treatment of the wires or strips at temperatures after the cold forming stage from 3oo to 7oo ° C to be connected.

Claims (2)

PATENTANSPRÜCHE: _. Verfahren zum Herstellen von Magnetogrammträgern in Draht- oder Bandform, dadurch gekennzeichnet, daß ferritische oder ferritisch-perlitische Chromstähle der Zusammensetzung bis r,o 01, Kohlenstoff, bis 2,5 °/o Nickel, bis 25,o °% Chrom, Rest Eisen und die üblichen Verunreinigungen dergestalt zu Drähten oder Bändern verarbeitet werden, daß sie ihr Fertigmaß durch eine mindestens 5o %, vorzugsweise aber mehr als 7o °/a betragende Kaltverformung erhalten. PATENT CLAIMS: _. Process for the production of magnetogram carriers in wire or tape form, characterized in that ferritic or ferritic-pearlitic chromium steels of the composition up to 0.1, carbon, up to 2.5% nickel, up to 25.0% chromium, the remainder being iron and the usual impurities are processed into wires or strips in such a way that they obtain their finished size by cold deformation amounting to at least 50%, but preferably more than 70 ° / a. 2. Verfahren nach Anspruch x, dadurch gekennzeichnet, daß sich an die Kaltverformung eine Wärmebehandlung bei Temperaturen von 3oo bis 7oo° C anschließt. Angezogene Druckschriften Schweizerische Patentschrift Nr. 9,49 899. .2. Procedure according to claim x, characterized in that the cold deformation is followed by a heat treatment at temperatures of 3oo to 7oo ° C. Attracted publications Swiss U.S. Patent No. 9.49,899.
DEST3454A 1951-06-03 1951-06-03 Process for the production of magnetogram carriers Expired DE891626C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEST3454A DE891626C (en) 1951-06-03 1951-06-03 Process for the production of magnetogram carriers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST3454A DE891626C (en) 1951-06-03 1951-06-03 Process for the production of magnetogram carriers

Publications (1)

Publication Number Publication Date
DE891626C true DE891626C (en) 1953-10-01

Family

ID=7453198

Family Applications (1)

Application Number Title Priority Date Filing Date
DEST3454A Expired DE891626C (en) 1951-06-03 1951-06-03 Process for the production of magnetogram carriers

Country Status (1)

Country Link
DE (1) DE891626C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH249899A (en) * 1944-10-21 1947-07-31 Ipsophon Patentgesellschaft Ag Sound carriers for magnetic recordings.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH249899A (en) * 1944-10-21 1947-07-31 Ipsophon Patentgesellschaft Ag Sound carriers for magnetic recordings.

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