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DE641478C - Process for improving the properties, e.g. B. the magnetic properties of sheets or tapes - Google Patents

Process for improving the properties, e.g. B. the magnetic properties of sheets or tapes

Info

Publication number
DE641478C
DE641478C DEM129225D DEM0129225D DE641478C DE 641478 C DE641478 C DE 641478C DE M129225 D DEM129225 D DE M129225D DE M0129225 D DEM0129225 D DE M0129225D DE 641478 C DE641478 C DE 641478C
Authority
DE
Germany
Prior art keywords
properties
sheets
hydrogen
improving
hydride
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
DEM129225D
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Priority to DEM129225D priority Critical patent/DE641478C/en
Application granted granted Critical
Publication of DE641478C publication Critical patent/DE641478C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1277Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
    • C21D8/1283Application of a separating or insulating coating
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1255Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Description

-Verfahren zur Verbesserung der .Eigenschaften, z. B. der magnetischen Eigenschaften, von Blechen oder Bändern Es ist bekannt, daß die verschiedensten Eigenschaften, z. B. die magnetischen Eigenschaften und die Tiefziehfähigkeit, von Metallen - und Metallegierungen durch Behandeln mit Wasserstoff wesentlich verbessert werden können. Die Wirkung des Wasserstoffes beruht anscheinend darauf, daß er auf Grund seiner großen Diffusionsfähigkeit in die -Werkstoffe eindringt und die schädlichen Verunreinigungen zu gasförmigen Verbindungen reduziert, die nunmehr durch Diffusion entweichen oder an den Korngrenzen austreten können. Die Behandlung geschieht durch Glühen in einer Wasserstoffatmosphäre.-Process to improve the .Properties, z. B. the magnetic Properties of sheets or strips It is known that the most varied Properties, e.g. B. the magnetic properties and deep drawability, of Metals and metal alloys significantly improved by treatment with hydrogen can be. The effect of the hydrogen is apparently based on the fact that it is on Because of its great diffusivity it penetrates into the materials and the harmful ones Impurities are reduced to gaseous compounds, now by diffusion escape or emerge at the grain boundaries. The treatment happens through Glow in a hydrogen atmosphere.

Die: Erfindung beruht auf der an sich bekannten Erkenntnis, daß atomarer Wasserstoff üi statu nascendi -wesentlich reaktionsfähiger ist als der bei dem bekannten Verfahren einwirkende molekulare Wasserstoff H2. Sie besteht darin, daß Metallhydride zwischen gestapelten Blechen und Bändern, z. B. Dynamoblechen, geschichtet und anschließend so hohen Temperaturen ausgesetzt werden, daß das Hydrid zerlegt wird und der Wasserstoff im Entstehungszustande auf den metallischen Werkstoff einwirkt.The: Invention is based on the per se known knowledge that atomic Hydrogen üi statu nascendi - is much more reactive than that of the known Process acting molecular hydrogen H2. It consists in the fact that metal hydrides between stacked sheets and strips, e.g. B. Dynamo sheets, layered and then exposed to such high temperatures that the hydride is decomposed and the hydrogen acts on the metallic material in the state of origin.

Die Ausführung des Verfahrens sei beispielsweise an der Behandlung von Transformatorenblechen zwecks Entfernung von Verunreinigungen, die die Wattverluste herabsetzen, erläutert. Die Bleche werden in einem Glühkasten oder einem gut verschließbaren Ofen übereinandergeschichtet, wobei zwischen die Bleche durch Aufstreuen oder Aufstreichen ein Metallhydrid gegeben wird. Es kann auch zugleich mit dem Hydrid ein indifferenter Stoff, der z. B. Calcium- oder Magnesiumoxyd enthalten kann, zugegeben werden, um ein Verkleben der Bleche zu verhindern. In den meisten Fällen dürfte sich jedoch eine Zugabe eines indifferenten Stoffes, der bekanntlich die austretenden Reaktionsprodukte teilweise aufnimmt und daher sehr vorteilhaft ist, erübrigen, da der Sauerstoffgehalt der Werkstoffe groß genug ist, um die Hydride über das Metall hinaus bis zum Oxyd zu oxydieren. Werden nunmehr die so aufgeschichteten Bleche erhitzt, so geben die Hydride bei einer bestimmten Temperatur, _ für Calciumhydrid etwa 5oo°, den Wasserstoff ab, und die oben geschilderte Wirkung des Wasserstoffes tritt ein.The execution of the procedure is, for example, in the treatment of transformer sheets for the purpose of removing impurities that cause watt losses reduce, explained. The sheets are in an annealing box or a well closable one Oven stacked, with between the trays by sprinkling or brushing a metal hydride is given. It can also be indifferent at the same time as the hydride Substance that z. B. calcium or magnesium oxide may be added to to prevent the sheets from sticking together. In most cases, however, it is likely to an addition of an inert substance, which is known to be the exiting reaction products partially absorbs and is therefore very beneficial, because the oxygen content the material is large enough to move the hydrides beyond the metal to the oxide to oxidize. If the sheets stacked in this way are now heated, they give Hydrides at a certain temperature, _ for calcium hydride about 500 °, the hydrogen from, and the above-described effect of the hydrogen occurs.

Die Vorteile dieses Verfahrens gehen deutlich aus diesem Beispiel hervor: Der Wasserstoff im statu nascendi ist besonders wirksam. Darüber hinaus wird durch die Anwendung fester Hydride noch erreicht, daß die Bleche gleichmäßig, also- auch im Mittelpunkt des Stapels, mit Wasserstoff in Berührung kommen. Die Menge des zugegebenen Wasserstoffes kann durch einfache Wägung des Hydrids leicht geregelt werden. Ein großer Vorteil des Verfahrens liegt noch darin, daß zur Ausführung einfache Glühkästen oder auch abschließbare Öfen benutzt werden können, die nur eine zusätzliche Vorrichtpng zum Ablassen der entstehenden Gase enthalten.-Für die Ausführung des Verfahrens sind grundsätzlich alle Hydride geeignet, die den Wasserstoff bei geeigneten Temperaturen abgeben. Besonders vorteilhaft sind die salzartigen Hydride der Alkalien und Erdalkalien, die Wasserstoff als Ion enthalten.The advantages of this procedure are clear from this example out: The hydrogen in the statu nascendi is particularly effective. Furthermore the use of solid hydrides also ensures that the sheets are uniform, So - also in the center of the stack, come into contact with hydrogen. the The amount of hydrogen added can easily be determined by simply weighing the hydride be managed. Another great advantage of the method is that it can be carried out simple annealing boxes or also lockable ovens are used can that only an additional Vorrichtpng for venting the resulting gases - In principle, all hydrides are suitable for carrying out the process, which release the hydrogen at suitable temperatures. Are particularly advantageous the salt-like hydrides of alkalis and alkaline earths, which contain hydrogen as an ion.

Claims (1)

PATENTANSPRÜCHE: i. Verfahren zur Verbesserung der Eigenschaften, z. B. der magnetischen Eigenschaften, von Blechen oder Bänden, dadurch gekennzeichnet, daß Metallhydride zwischen den gestapelten Blechen oder Bändern, z. B. Dynamoblechen, geschichtet und anschließend so hohen Temperaturen ausgesetzt werden, daß das Hydrid zerlegt wird und der Wasserstoff desselben auf den metaDfischen Werkstoff einwirkt. a. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß verschiedene Hydride gleichzeitig zur Anwendung gebracht werden. 3. Verfahren nach Anspruch i und a, dadurch gekennzeichnet, daß mit dem Hydrid gleichzeitig solche indifferente Stoffe in Berührung gebracht werden, die, durch die Wasserstoffbehandlung des Metalls entstehenden Stoffe adsorbieren oder, chemisch binden.PATENT CLAIMS: i. Process for improving the properties, z. B. the magnetic properties of sheet metal or strips, characterized in that metal hydrides between the stacked sheets or strips, e.g. B. Dynamo sheets, layered and then exposed to such high temperatures that the hydride is decomposed and the hydrogen of the same acts on the meta-fish material. a. Process according to claim i, characterized in that different hydrides are used simultaneously can be applied. 3. The method according to claim i and a, characterized in that that such inert substances were brought into contact with the hydride at the same time adsorb the substances produced by the hydrogen treatment of the metal or, chemically bind.
DEM129225D 1934-11-18 1934-11-18 Process for improving the properties, e.g. B. the magnetic properties of sheets or tapes Expired DE641478C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM129225D DE641478C (en) 1934-11-18 1934-11-18 Process for improving the properties, e.g. B. the magnetic properties of sheets or tapes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM129225D DE641478C (en) 1934-11-18 1934-11-18 Process for improving the properties, e.g. B. the magnetic properties of sheets or tapes

Publications (1)

Publication Number Publication Date
DE641478C true DE641478C (en) 1937-02-01

Family

ID=7331686

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM129225D Expired DE641478C (en) 1934-11-18 1934-11-18 Process for improving the properties, e.g. B. the magnetic properties of sheets or tapes

Country Status (1)

Country Link
DE (1) DE641478C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE931411C (en) * 1940-10-09 1955-08-08 Armco Int Corp Process to increase the cold formability with low core losses of Si steel sheets
DE1205573B (en) * 1960-07-06 1965-11-25 Mannesmann Ag Process for annealing electrical steel sheets or strips
DE1210799B (en) * 1960-03-31 1966-02-17 Continental Oil Co Process for the production of vinyl fluoride

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE931411C (en) * 1940-10-09 1955-08-08 Armco Int Corp Process to increase the cold formability with low core losses of Si steel sheets
DE1210799B (en) * 1960-03-31 1966-02-17 Continental Oil Co Process for the production of vinyl fluoride
DE1205573B (en) * 1960-07-06 1965-11-25 Mannesmann Ag Process for annealing electrical steel sheets or strips

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