DE624268C - Device for bright annealing of metal goods in airtight, closed annealing pots - Google Patents

Device for bright annealing of metal goods in airtight, closed annealing pots

Info

Publication number
DE624268C
DE624268C DE1930624268D DE624268DD DE624268C DE 624268 C DE624268 C DE 624268C DE 1930624268 D DE1930624268 D DE 1930624268D DE 624268D D DE624268D D DE 624268DD DE 624268 C DE624268 C DE 624268C
Authority
DE
Germany
Prior art keywords
annealing
airtight
pots
metal
closed
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
DE1930624268D
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.)
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri France SA
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 BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
Application granted granted Critical
Publication of DE624268C publication Critical patent/DE624268C/en
Expired legal-status Critical Current

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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)
  • Furnace Charging Or Discharging (AREA)

Description

Einrichtung zum Blankglühen von Metallwaren in luftdicht geschlossenen Glühtöpfen Beim Blankglühen von Metallwaren in geschlossenen Glühtöpfen ohne besonderes Schutzgas hat es sich gezeigt, daß die äußeren Schichten des Glühgutes leicht etwas anlaufen, was auf einen Angriff durch Reste von Sauerstoff im Innern des Glühtopfes schließen läßt. Es ist nun bekanntgeworden, zur Verhütung einer derartigen Oxydation der äußeren Glühgutschichten den Glühtopf innen mit Aluminium oder Kupfer auszukleiden. Dadurch sollte erreicht werden, daß der im Topf noch vorhandene Sauerstoff an diese Auskleidung gebunden wird, weil sie sich beim Anheizen des Topfes naturgemäß zuerst, vor dem Topfinhalt, erhitzt, indem die Hitze von außen durch die Topfwandung in das Topfinnere gelangt; auf diese Weise soll der Sauerstoff also bereits gebunden werden, bevor die Glühbitze zum Glühgut gelangt ist. Diese Maßnahme hat jedoch in manchen Fällen versagt, vor allem dann, wenn das Glühgut einen gewissen Abstand von der Topfwandung besitzt, wie es z. B. beim Glühen von Draht- oder Bandringen meist der Fall ist.Device for bright annealing of metal goods in airtight closed Incandescent pots With the bright annealing of metal goods in closed incandescent pots without special Protective gas, it has been shown that the outer layers of the material to be annealed slightly start up, suggesting an attack by residues of oxygen inside the glow pot lets close. It has now become known to prevent such oxidation of the outer layers of annealing material, line the inside of the annealing pot with aluminum or copper. This should ensure that the oxygen still present in the pot is transferred to this Lining is tied because naturally when the pot is heated it is first in front of the contents of the pot, heated by applying the heat from the outside through the wall of the pot the inside of the pot gets; in this way the oxygen should already be bound before the lightbulb has reached the material to be annealed. However, this measure has in In some cases it fails, especially when the material to be annealed has a certain distance possesses from the pot wall, as it is, for. B. when annealing wire or band rings mostly the case.

Hier setzt die Erfindung ein, gemäß welcher in den Raum zwischen der Innenwand des Glühtopfes und dem Glühgut ein herausnehmbarer fester Schutzmantel aus einem Metall eingefügt wird, das leichter oder mindestens ebenso leicht oxydiert wird wie das Glühgut. Es hat sich gezeigt, daß ein solcher Mantel imstande ist, den Sauerstoff vollständig an sich zu ziehen, besonders dann, wenn seine Oberfläche künstlich vergrößert ist, z. B. durch Anbringung von Durchbrechungen, also durch gelochte oder gitterförmige Ausbildung des Mantels. Der Mantel kann nach seinem Verbrauch leichtausgewechselt werden. Er kann, da, wie erwähnt, die Hitze an ihn zuerst gelangt, aus dem gleichen Metall bestehen wie das Glühgut, man kann ihn aber auch aus leichter oxydierendem Metall machen, beim Blankglühen von Kupfer etwa aus Eisen oder Aluminium.This is where the invention begins, according to which in the space between the Inner wall of the annealing pot and the annealing material have a removable, solid protective jacket is inserted from a metal that oxidizes more easily or at least as easily becomes like the glowing material. It has been shown that such a coat is capable of to draw the oxygen completely into itself, especially when its surface is artificially enlarged, e.g. B. by making openings, so through perforated or grid-shaped design of the jacket. The coat can be after his Consumption can be easily replaced. As mentioned, he can put the heat on him first come, consist of the same metal as the annealing material, but you can do it can also be made from more easily oxidizing metal, for example when bright annealing copper Iron or aluminum.

Claims (2)

PATENTANSPRÜCHE: i. Einrichtung zum Blankglühen von Metallwaren in luftdicht geschlossenen Glühtöpfen aus hitzebeständigem, schwer oxydierendem Metall ohne besonderes Schutzgas, dadurch gekennzeichnet, daß in den Raum zwischen der Innenwand des Glühtopfes und dem Glühgut ein herausnehmbarer fester Schutzmantel aus einem Metall eingefügt ist, das leichter oder mindestens ebenso leicht oxydiert wird wie das Glühgut. PATENT CLAIMS: i. Device for bright annealing of metal goods in Airtight, sealed glow pots made of heat-resistant, hard-to-oxidize metal without special protective gas, characterized in that in the space between the Inner wall of the annealing pot and the annealing material have a removable, solid protective jacket is inserted from a metal that oxidizes more easily or at least as easily becomes like the glowing material. 2. Einrichtung nach Anspruch i, dadurch gekennzeichnet, daß die Oberfläche des Mantels, z. B. durch Durchbrechungen, vergrößert ist.2. Device according to claim i, characterized in that the surface of the jacket, e.g. B. is enlarged by perforations.
DE1930624268D 1930-05-04 1930-05-04 Device for bright annealing of metal goods in airtight, closed annealing pots Expired DE624268C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE624268T 1930-05-04

Publications (1)

Publication Number Publication Date
DE624268C true DE624268C (en) 1936-01-16

Family

ID=6577969

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930624268D Expired DE624268C (en) 1930-05-04 1930-05-04 Device for bright annealing of metal goods in airtight, closed annealing pots

Country Status (1)

Country Link
DE (1) DE624268C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543708A (en) * 1947-05-29 1951-02-27 Comstock & Wescott Heat-treating furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543708A (en) * 1947-05-29 1951-02-27 Comstock & Wescott Heat-treating furnace

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