DE767831C - Process for producing thick-walled steel pipes - Google Patents

Process for producing thick-walled steel pipes

Info

Publication number
DE767831C
DE767831C DEB196545D DEB0196545D DE767831C DE 767831 C DE767831 C DE 767831C DE B196545 D DEB196545 D DE B196545D DE B0196545 D DEB0196545 D DE B0196545D DE 767831 C DE767831 C DE 767831C
Authority
DE
Germany
Prior art keywords
mold
steel pipes
walled steel
producing thick
thick
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
DEB196545D
Other languages
German (de)
Inventor
Hermann Wehmeier
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.)
Buderus AG
Original Assignee
BuderusSche Eisenwerke 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 BuderusSche Eisenwerke AG filed Critical BuderusSche Eisenwerke AG
Priority to DEB196545D priority Critical patent/DE767831C/en
Application granted granted Critical
Publication of DE767831C publication Critical patent/DE767831C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Description

Verfahren zum Herstellen dickwandiger Stahlrohre Durch das Patent 767 722 ist ein Verfahren zum Herstellen dickwandiger Stahlrohre mit sehr kleiner Lichtweite, z. $. von Geschützrohren, durch Schleuderguß, geschützt, bei welchem zur Erzielung der möglichst kleinen. Lichtweite die durch die Schwindung des Stahles während des Eingießens und Schleuderns eintretende Volumenverminderung durch ein entsprechend langsames Eingießen des Stahles ausgeglichen wird.Method for producing thick-walled steel pipes By the patent 767 722 a method for producing thick-walled steel pipes with a very small clear width, e.g. $. by gun barrels, protected by centrifugal casting, in which to achieve the smallest possible. Clearance the reduction in volume caused by the shrinkage of the steel during pouring and spinning is compensated for by a correspondingly slow pouring of the steel.

Die vorliegende Erfindung stellt eine Weiterbildung und Verbesserung dieses Verfahrens dar, indem neben der Art des Eingießens auch noch die Regelung der Drehzahl der Kokille oder Form auf die Erzeugung der dickwandigen Stahlrohre mit kleinster Lichtweite abgestimmt wird. Demgemäß geht der Vorschlag der Erfindung dahin, da,B während des langsamen Eingießens des flüssigen Stahles die Drehzahl der Kokille oder Form von Null beginnend allmählich stufenlos ansteigend gesteigert und nach dem vollständigen Füllen der Kokille oder Form sprunghaft auf das Höchstmaß erhöht wird, so daß ein möglichst tiefreichender mittlerer Hohlraum in dem Gußblock entsteht. Während das langsame Eingießen des Stahles in der Hauptsache zu der Erzeugung kleinster Lichtweiten beiträgt, gelingt es mit der angegebenen Regelung der Drehzahl, die Rohre trotz ihrer dicken Wandstärke in einwandfreier Beschaffenheit, d. h. ohne Rißbildung und mit glatter Oberfläche, also ohne Mattschweißenbildung und Spritzer, herzustellen. Am vorteilhaftesten ist für die Durchführung des Verfahrens die senkrechte Lage der Kokille oder Form während des - Eingießens und Schleuderns, weil durch sie die ungestörte und gleichmäßige Erstarrung des Werkstoffes begünstigt wird. Damit soll aber die Erfindung nicht auf den senkrechten Schleuderguß beschränkt werden.The present invention is a development and improvement This procedure represents, in addition to the type of pouring also still the regulation the speed of the mold or mold on the production of the thick-walled steel pipes is tuned with the smallest clearance. Accordingly, the proposal of the invention goes then, because, B is the speed during the slow pouring of the liquid steel the mold or mold, starting from zero, gradually increasing and after the mold or mold has been completely filled by leaps and bounds to the maximum is increased so that as deep a central cavity as possible arises in the ingot. During the slow pouring of the steel in the main contributes to the generation of the smallest clearances, it succeeds with the specified Regulation of the speed, the pipes work perfectly in spite of their thick wall thickness Texture, d. H. without cracking and with a smooth surface, i.e. without matt welding and splashes. It is most beneficial for performing the procedure the vertical position of the mold or mold during - pouring and spinning, because it promotes the undisturbed and uniform solidification of the material will. However, this is not intended to limit the invention to vertical centrifugal casting will.

Claims (1)

PATEXT.iNiSPRUCH: Verfahren zum Herstellen dickwandiger Stahlrohre gemäß Patent 767 722, dadurch gekennzeichnet, daß während des langsamen Eingießens des flüssigen Stahles die Drehzahl der Kokille von Null beginnend allmählich stufenlos ansteigend gesteigert und nach dem vollständigen Füllen der Kokille sprunghaft auf das Höchstmaß erhöht wird, so daß ein möglichst tiefreichender mittlerer Hohlraum in dem Gußblock entsteht. Zur Abgrenzung des Erfindungsgegenstands vom Stand der Technik ist im Erteilungsverfahren folgende Druckschrift in Betracht gezogen worden: Deutsche Patentschrift Nr. 519 a37.PATEXT.iNiSPRUCH: Process for the production of thick-walled steel pipes according to patent 767 722, characterized in that during the slow pouring of the liquid steel, the rotational speed of the mold is gradually increased from zero and is increased by leaps and bounds to the maximum after the mold has been completely filled, so that as deep a central cavity as possible is created in the cast block. To distinguish the subject matter of the invention from the state of the art, the following publication was considered in the granting procedure: German Patent No. 519 a37.
DEB196545D 1941-12-28 1941-12-28 Process for producing thick-walled steel pipes Expired DE767831C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB196545D DE767831C (en) 1941-12-28 1941-12-28 Process for producing thick-walled steel pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB196545D DE767831C (en) 1941-12-28 1941-12-28 Process for producing thick-walled steel pipes

Publications (1)

Publication Number Publication Date
DE767831C true DE767831C (en) 1953-11-23

Family

ID=7011941

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB196545D Expired DE767831C (en) 1941-12-28 1941-12-28 Process for producing thick-walled steel pipes

Country Status (1)

Country Link
DE (1) DE767831C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE519237C (en) * 1928-06-16 1931-02-25 Mannesmann Ag Process for the production of hollow metal bodies by centrifugal casting

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE519237C (en) * 1928-06-16 1931-02-25 Mannesmann Ag Process for the production of hollow metal bodies by centrifugal casting

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