AT63307B - Method for cementing objects made of iron, steel or steel alloys by means of a gas and granular coal. - Google Patents

Method for cementing objects made of iron, steel or steel alloys by means of a gas and granular coal.

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Publication number
AT63307B
AT63307B AT63307DA AT63307B AT 63307 B AT63307 B AT 63307B AT 63307D A AT63307D A AT 63307DA AT 63307 B AT63307 B AT 63307B
Authority
AT
Austria
Prior art keywords
steel
cementing
granular coal
gas
iron
Prior art date
Application number
Other languages
German (de)
Original Assignee
Anonima Italiana Gio Ansaldo A
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 Anonima Italiana Gio Ansaldo A filed Critical Anonima Italiana Gio Ansaldo A
Application granted granted Critical
Publication of AT63307B publication Critical patent/AT63307B/en

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  • Manufacture And Refinement Of Metals (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



    Verfahren zum Zementieren von Gegenständen aus Eisen, Stahl oder Stahllegierungen mittels eines Gases und körniger Kohle.   
 EMI1.1 
 

 <Desc/Clms Page number 2> 

 
 EMI2.1 
    Bodenverschluss der Zementierungskammer. Die   körnige Kohle gleitet dann aus der Kammer leicht heraus und wird in einem Behälter gesammelt, um darauf in bekannter Weise in   einer anderen Zemontierungskammer weitere Verwendung zu finden. 



  In vielen Fällen (und gerade dann, wenn man sehr tiefe zementierte Zonen erhalten   will, ohne dass die Konzentration des   Kolilenstoffgehaltes   beträchtliche Werte erreicht) entleert man, ebenso wie bei dem Verfahren nach der   französischen   Patentschrift Nr.   415985,   zweckmässig die   Zementiernngskammer   nicht vollständig von der körnigen Kohle, sondern nur bis zur notwendigen Menge, um die Oberfläche der zu zementierenden Stücke freizulegen, und setzt das Erhitzen und Zirkulierenlassen des Luftstromes in Gegenwart der noch vorhandenen Kohle fort. 



   Die aus der Zementierungskammer entweichenden Gase können in bekannter Weise in einem Behälter für weitere Zementierungsarbeiten aufgefangen werden Man vermeidet so, eine kleine Menge körniger Kohle zu verbrennen, was selbstverständlich eintritt wenn man die Luft unvermittelt anwendet. Derselbe Zweck kann erreicht werden, wenn man im Anfang die Luft durch Holzkohle, die auf 1000 bis   11000 C in   einem besonderen Ofen erhitzt worden ist, vor ihrem Eintritt in die   Zementierungskammer   streichen   lässt.   



   Wenn man in der zementierten Zone einen höheren Gehalt an Kohlenstoff haben will, braucht man nur in bekannter Weise mehr oder minder grosse   Mengen fassiger   oder gas- förmiger Kohlenwasserstoffe in die Gegend der Zementiernngskammer einzuleiten, wo die
Luft bereits eine Schicht körniger Kohle von mindestens 10 cm Dicke durchstrichen hat. 



   Falls man eine sehr grosse   Gleichmässigkeit   der zementierten Zone auf der ganzen
Oberfläche der Stahlgegenstände erreichen will, braucht man nur die Zementierungskammer während der Operation langsam zu   drehen,   oder besser, man kann die Stahlgegenstände, die alle in körniger Kohle eingebettet liegen, an einer drehbaren Welle, weiche durch die dichte Wand der Zementierungskammer hindurchgeht, befestigen.



   <Desc / Clms Page number 1>
 



    Method for cementing objects made of iron, steel or steel alloys by means of a gas and granular coal.
 EMI1.1
 

 <Desc / Clms Page number 2>

 
 EMI2.1
    Bottom closure of the cementation chamber. The granular coal then easily slides out of the chamber and is collected in a container in order to then find further use in a known manner in another demounting chamber.



  In many cases (and especially when you want to obtain very deep cemented zones without the concentration of the colilant content reaching considerable values), as with the method according to French patent specification No. 415985, it is advisable not to empty the cementing chamber completely from the granular coal, but only to the extent necessary to expose the surface of the pieces to be cemented, and continues heating and circulating the air flow in the presence of the remaining coal.



   The gases escaping from the cementing chamber can be collected in a known manner in a container for further cementing work. This avoids burning a small amount of granular coal, which of course occurs when the air is used suddenly. The same purpose can be achieved by initially passing the air through charcoal heated to 1000 to 11000 C in a special oven before it enters the cementing chamber.



   If one wants to have a higher content of carbon in the cemented zone, one only needs to introduce more or less large amounts of solid or gaseous hydrocarbons into the area of the cementing chamber, where the
Air has already passed through a layer of granular coal at least 10 cm thick.



   If you have a very great evenness of the cemented area on the whole
To reach the surface of the steel objects, one only needs to rotate the cementing chamber slowly during the operation, or rather, one can attach the steel objects, which are all embedded in granular coal, to a rotatable shaft that passes through the sealed wall of the cementing chamber.

 

Claims (1)

EMI2.2 Verfahren zum Zementieren von Gegenständen aus Eisen, Stahl oder Stahllegierungen mittels eines Gases und körniger Kohle, in welche Gegenstande eingebettet werden, dadurch gekennzeichnet, dass zwecks Bildung eines kohlend wirkenden Gases in dem Zementierungs- beha ! ter seibat ein Luftstrom durch die körnige Kohlenmasse hindorchgeftthrt wird. EMI2.2 Method for cementing objects made of iron, steel or steel alloys by means of a gas and granular coal, in which objects are embedded, characterized in that for the purpose of forming a carbonic gas in the cementing agent! ter seibat a stream of air is guided through the granular coal mass.
AT63307D 1910-10-17 1911-10-05 Method for cementing objects made of iron, steel or steel alloys by means of a gas and granular coal. AT63307B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT63307X 1910-10-17

Publications (1)

Publication Number Publication Date
AT63307B true AT63307B (en) 1914-02-10

Family

ID=11121008

Family Applications (1)

Application Number Title Priority Date Filing Date
AT63307D AT63307B (en) 1910-10-17 1911-10-05 Method for cementing objects made of iron, steel or steel alloys by means of a gas and granular coal.

Country Status (1)

Country Link
AT (1) AT63307B (en)

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