DE698011C - Muffle for hardening steel - Google Patents
Muffle for hardening steelInfo
- Publication number
- DE698011C DE698011C DE1937ST056960 DEST056960D DE698011C DE 698011 C DE698011 C DE 698011C DE 1937ST056960 DE1937ST056960 DE 1937ST056960 DE ST056960 D DEST056960 D DE ST056960D DE 698011 C DE698011 C DE 698011C
- Authority
- DE
- Germany
- Prior art keywords
- muffle
- hardened
- furnace
- hardening steel
- heated
- 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
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0043—Muffle furnaces; Retort furnaces
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)
- Muffle Furnaces And Rotary Kilns (AREA)
Description
Muffel zum Härten von Stählen Bekanntlich bereitet die Verzunderung -beim Härten von Werkzeugen beim Anwärmen und bei der Entnahme der Werkzeuge aus dem Ofen auf dem Weg zur Abschreckung - besondere Schwierigkeiten. Man hat bereits vorgeschlagen, das Anwärmen des Härtegutes unter Anwendung eines Schutzgases durchzuführen. Hierbei ist das Härtegut zwar im Ofen mehr oder weniger vor Verzunderung geschützt; es ist aber auf dem Weg zur Abschreckung dem Luftsauerstoff ausgesetzt. Es ist ferner bekannt, die zu härtenden Gegenstände in Schutzmittel, wie beispielsweise Koksasche, unter Zusatz von Holzkohlenpulver o. dgl., in verschlossenen Kästen im Ofen auf Temperatur zu bringen. Hierbei tritt der Übelstand auf, daß der Temperaturverlauf am Härtegut selbst nicht beobachtet werden kann und daß durch das umständliche Ein- und Auspacken das Härtegut einer starken Verschmutzung ausgesetzt wird. Es wurde nun gefunden, daß die nachstehend beschriebene Muffel es ohne Anwendung irgendwelcher Schutzmaßnahmen ermöglicht, das Glühgut in der Muffel vom Ofen zur Abschreckvorrichtung zu bringen, ohne daß hierbei eine Verzunderung des Glühgutes eintritt. Die Muffel ist erfindungsgemäß zwecks Wärmespeicherungserhöhung an ihrem offenen Vorderteil mit einer verstärkten Muffelwand ausgebildet.Muffle for hardening steels It is well known that scaling is the cause -when tools are hardened, when they are heated and when the tools are removed the furnace on the way to deterrence - special difficulties. One already has suggested that the hardened material be heated using a protective gas. Here the hardened material is more or less protected from scaling in the furnace; however, it is exposed to atmospheric oxygen on the way to deterrence. It is further known to put the objects to be hardened in protective agents, such as coke ash, with the addition of charcoal powder or the like, in closed boxes in the oven Bring temperature. Here the disadvantage occurs that the temperature profile cannot be observed on the hardened material itself and that the laborious and unpacking the material to be hardened is exposed to severe pollution. It was now found that the muffle described below can do it without applying any Protective measures enable the annealing material in the muffle from the furnace to the quenching device without any scaling of the material to be annealed. The grouch is according to the invention for the purpose of increasing heat storage at its open front part formed with a reinforced muffle wall.
Zwei beispielsweise Anwendungsformen der Muffel zeigen die -Abb. z und ?- In Abb. z bedeuten: a Horizontalofen, b Ofentür, e Muffel, d verstärkter Hals der Muffel, e Aufsetznase, f Ösen.Two examples of application forms of the muffle are shown in Fig. z and ? - In Fig. z: a horizontal furnace, b furnace door, e muffle, d reinforced neck of the muffle, e contact nose, f eyelets.
In. Abb. 2 bedeuten: a Ofendeckel, b Vertikalofen (Schachtofen), c Heizung, d Muffel, e verstärkter Hals der Muffel, f Ösen an der Muffel, zum Transport derselben, g Traverse zum Aufhängen der zu härtenden Werkstücke.In. Fig. 2 mean: a furnace cover, b vertical furnace (shaft furnace), c heating, d muffle, e reinforced neck of the muffle, f eyelets on the muffle for transporting the same, g traverse for hanging up the workpieces to be hardened.
Die Muffel eignet sich für horizontale und vertikale brennsto_ff- oder elektrisch beheizte Öfen. Das Härtegut kann während des Aufheizens genau beobachtet werden und verbleibt bis zum Augenblick des Abschreckens in der auf Temperatur befindlichen Muffel.The muffle is suitable for horizontal and vertical fuel or electrically heated ovens. The material to be hardened can be observed closely while it is being heated and remains at that temperature until the moment of quenching Grouch.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1937ST056960 DE698011C (en) | 1937-12-29 | 1937-12-29 | Muffle for hardening steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1937ST056960 DE698011C (en) | 1937-12-29 | 1937-12-29 | Muffle for hardening steel |
Publications (1)
Publication Number | Publication Date |
---|---|
DE698011C true DE698011C (en) | 1940-10-30 |
Family
ID=7467595
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1937ST056960 Expired DE698011C (en) | 1937-12-29 | 1937-12-29 | Muffle for hardening steel |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE698011C (en) |
-
1937
- 1937-12-29 DE DE1937ST056960 patent/DE698011C/en not_active Expired
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