DE881671C - Process for improving the initial permeability of iron-silicon, iron-aluminum and iron-silicon-aluminum alloys - Google Patents

Process for improving the initial permeability of iron-silicon, iron-aluminum and iron-silicon-aluminum alloys

Info

Publication number
DE881671C
DE881671C DEA7315D DEA0007315D DE881671C DE 881671 C DE881671 C DE 881671C DE A7315 D DEA7315 D DE A7315D DE A0007315 D DEA0007315 D DE A0007315D DE 881671 C DE881671 C DE 881671C
Authority
DE
Germany
Prior art keywords
iron
silicon
aluminum
improving
initial permeability
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
DEA7315D
Other languages
German (de)
Inventor
Franz Dr-Ing Pawlek
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.)
AEG AG
Original Assignee
AEG 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 AEG AG filed Critical AEG AG
Priority to DEA7315D priority Critical patent/DE881671C/en
Application granted granted Critical
Publication of DE881671C publication Critical patent/DE881671C/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Silicon Compounds (AREA)

Description

Verfahren zur Verbesserung der Anfangspermeabilität von Eisen-Silizium-, Eisen-Aluminium- und Eisen-Silizium-Aluminium-Legierungen Es istbereits bekannt, Eisen-Silizium-Legierungen zur Erzeugung guter Permeabilitätswerte mehrere Stunden in Wasserstoff bei 80o bis 130o° C zu glühen. Gemäß einem neueren Vorschlag wird die Anfangspermeabilität der Eisen-Silizium-Legierungen dadurch verbessert, daß der bei der Glühung zur Anwendung kommende Wasserstoff sehr rein ist, insbesondere weniger als o, i % Stickstoff und gegebenenfalls weniger als 0,o1 g Wasser pro Kubikmeter enthält. Dieses Verfahren läßt sich gemäß einem weiteren Vorschlag mit Vorteil auch auf Eisen-Aluminium- und Eisen-Silizium-Aluminium-Legierungen anwenden.Process for improving the initial permeability of iron-silicon, Iron-aluminum and iron-silicon-aluminum alloys It is already known Iron-silicon alloys to generate good permeability values for several hours to glow in hydrogen at 80o to 130o ° C. According to a recent proposal, improves the initial permeability of the iron-silicon alloys in that the hydrogen used for annealing is very pure, especially less than 0.1% nitrogen and optionally less than 0.1 g water per cubic meter contains. According to a further proposal, this method can also advantageously be used apply to iron-aluminum and iron-silicon-aluminum alloys.

Es wurde nun gefunden, daß eine Verringerung der Glühzeit und eine raschere Wegführung der Verunreinigungen oder eine Einsparung von Wasserstoff erzielt werden kann, wenn die Glühung in reinstem Wasserstoff mit einer Vakuumglühung kombiniert wird. Dabei kann die Vakuumglühung vor der Wasserstoffglühung oder zwischen zwei Wasserstoffglühungen durchgeführt werden.It has now been found that a reduction in the glow time and a faster removal of the impurities or a saving of hydrogen achieved can be achieved if the annealing in the purest hydrogen is combined with a vacuum annealing will. The vacuum annealing can be done before the hydrogen annealing or between two Hydrogen annealing can be carried out.

Auch bei dieser Glühweise ist es von Vorteil, den Feuchtigkeitsgehalt des Wasserstoffes unter o,1 g Wasser pro Kubikmeter zu halten.Even with this annealing method, it is advantageous to check the moisture content of hydrogen to keep below 0.1 g of water per cubic meter.

Claims (1)

PATENTANSPRÜCHE: 1. Verfahren zur Verbesserung der Anfangspermeabilität von Eisen-Silizium-, Eisen-Aluminium - und Eisen-Silizium-Aluminium-Legierungen durch. eine Wärmebehandlung bei vorzugsweise goo bis 1400° C, dadurch gekennzeichnet, daß die Wärmebehandlung zunächst im Vakuum und dann in einer reinen Wasserstoffatmosphäre mit weniger als o, i °/o Stickstoff und zweckmäßig weniger als o,oi g Wasser pro Kubikmeter durchgeführt wird. z. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Wärmebehandlung im Vakuum zwischen zwei Wärmebehandlungen in reinem Wasserstoff vorgenommen wird. PATENT CLAIMS: 1. Process for improving the initial permeability of iron-silicon, iron-aluminum and iron-silicon-aluminum alloys by. a heat treatment at preferably goo to 1400 ° C, characterized in that the heat treatment is carried out first in a vacuum and then in a pure hydrogen atmosphere with less than o, i ° / o nitrogen and expediently less than o, oi g water per cubic meter. z. Process according to Claim i, characterized in that the heat treatment is carried out in a vacuum between two heat treatments in pure hydrogen.
DEA7315D 1942-01-27 1942-01-27 Process for improving the initial permeability of iron-silicon, iron-aluminum and iron-silicon-aluminum alloys Expired DE881671C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA7315D DE881671C (en) 1942-01-27 1942-01-27 Process for improving the initial permeability of iron-silicon, iron-aluminum and iron-silicon-aluminum alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA7315D DE881671C (en) 1942-01-27 1942-01-27 Process for improving the initial permeability of iron-silicon, iron-aluminum and iron-silicon-aluminum alloys

Publications (1)

Publication Number Publication Date
DE881671C true DE881671C (en) 1953-07-02

Family

ID=6921203

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA7315D Expired DE881671C (en) 1942-01-27 1942-01-27 Process for improving the initial permeability of iron-silicon, iron-aluminum and iron-silicon-aluminum alloys

Country Status (1)

Country Link
DE (1) DE881671C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069651B (en) * 1959-11-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069651B (en) * 1959-11-26

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