EP0605379B1 - Verfahren zum Giessen eines pastenartigen Metalles - Google Patents

Verfahren zum Giessen eines pastenartigen Metalles Download PDF

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Publication number
EP0605379B1
EP0605379B1 EP93870235A EP93870235A EP0605379B1 EP 0605379 B1 EP0605379 B1 EP 0605379B1 EP 93870235 A EP93870235 A EP 93870235A EP 93870235 A EP93870235 A EP 93870235A EP 0605379 B1 EP0605379 B1 EP 0605379B1
Authority
EP
European Patent Office
Prior art keywords
metal
finely divided
casting
cast
overheating
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 - Lifetime
Application number
EP93870235A
Other languages
English (en)
French (fr)
Other versions
EP0605379A1 (de
Inventor
Paul Naveau
Stéphan Wilmotte
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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 Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of EP0605379A1 publication Critical patent/EP0605379A1/de
Application granted granted Critical
Publication of EP0605379B1 publication Critical patent/EP0605379B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/112—Treating the molten metal by accelerated cooling

Definitions

  • the present invention relates to a method for casting a metal, in particular steel, in the pasty phase in a continuous casting ingot mold.
  • the casting of a metal in the pasty phase consists in casting this metal, for example steel, at a temperature included in its solidification interval, that is to say between its liquidus and solidus temperatures.
  • This casting technique has well-known advantages such as, in the case of steel, obtaining fine and homogeneous structures which reduce segregation in the cast products.
  • This casting method is also called low overheating casting, as opposed to conventional casting in which the metal has a clear overheating compared to its liquidus.
  • this overheating is usually of the order of 25 ° C to 35 ° C.
  • argon is blown inside the hollow jet, usually with a flow rate of 5 to 25 l / min, to prevent oxidation of the metal; the lowering of the overheating is ensured by an external cooling of the intermediate nozzle.
  • the object of the present invention is to propose a method making it possible to better control the residual overheating of the cast metal and to further improve the homogeneity of this metal in the ingot mold.
  • a process for the continuous casting of a metal in the pasty phase in which said metal is poured in a hollow jet in a nozzle located between the distributor basket and the continuous casting mold and in which the lowering of the metal overheating by external cooling of said nozzle is characterized in that the residual metal overheating is regulated by injecting, into the internal volume of said hollow jet, a finely divided metallic material suspended in a non-oxidizing gas , said finely divided material having as low an oxygen content as possible.
  • a finely divided material is injected consisting of a powder of the same metal as the cast metal, for example a steel powder inside a hollow jet of steel, it results in a refinement and an increased homogenization of the steel structure, which can lead to a disappearance of the axial segregation and to obtaining very homogeneous mechanical properties.
  • the quantity of finely divided metal thus injected does not exceed 1% of the weight of the cast metal.
  • the injected material is a powder of a metal other than the cast metal, and capable of forming therewith a predetermined alloy.
  • This variant makes it possible to manufacture metal alloys having a particularly homogeneous structure and therefore more regular mechanical properties.
  • the quantity of alloy metal injected is preferably between 0.5 and 10% of the weight of the cast metal.
  • the particle size of the finely divided material is less than 1000 ⁇ m depending on the nature of this material and the desired effect, with a preferred value of approximately 200 ⁇ m if it is steel powder injected. in a stream of steel.
  • the pressure of the gas transporting the finely divided materials in suspension will be slightly higher than atmospheric pressure, in order to avoid any entry of air by possible interstices of the casting device.
  • This pressure will however be at most equal, and preferably lower than the ferrostatic pressure which prevails at the place of arrival of the metal in the ingot mold, so as to prevent any bubbling of the gas in the metal and the risk of entry of air through the ingot mold.

Landscapes

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

Claims (4)

  1. Verfahren zum Stranggießen von Metall in halbfester Phase, bei dem man besagtes Metall als Hohlstrahl in einer zwischen dem Verteilerkorb und der Stranggußkokille angeordneten Düse gießt und bei dem man die Verringerung der Überhitzung des Metalls durch Außenkühlung der besagten Düse sicherstellt, dadurch gekennzeichnet, daß man die restliche Überhitzung des Metalls dadurch regelt, daß man einen feinverteilten, in einem nicht oxydierenden Gas suspendierten metallischen Stoff in das Innenvolumen des besagten Hohlstrahls einspritzt, wobei der besagte feinverteilte Stoff den kleinstmöglichen Sauerstoffgehalt aufweist.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß, wenn der besagte feinverteilte Stoff aus einem Pulver desselben Metalls wie das gegossene Metall besteht, man eine Menge einspritzt, die gleich oder kleiner als 1 Gew.-% des gegossenen Metalls ist.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß, wenn der besagte feinverteilte Stoff aus einem Pulver eines von dem gegossenen Metall verschiedenen Metalls besteht, man eine Menge zwischen 0,5 und 10 Gew.-% des gegossenen Metalls einspritzt.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der besagte feinverteilte Stoff eine kleinere Teilchengröße als 1000 µm aufweist.
EP93870235A 1992-12-28 1993-12-16 Verfahren zum Giessen eines pastenartigen Metalles Expired - Lifetime EP0605379B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9201158A BE1006567A6 (fr) 1992-12-28 1992-12-28 Procede de coulee d'un metal en phase pateuse.
BE9201158 1992-12-28

Publications (2)

Publication Number Publication Date
EP0605379A1 EP0605379A1 (de) 1994-07-06
EP0605379B1 true EP0605379B1 (de) 1997-07-09

Family

ID=3886617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93870235A Expired - Lifetime EP0605379B1 (de) 1992-12-28 1993-12-16 Verfahren zum Giessen eines pastenartigen Metalles

Country Status (3)

Country Link
EP (1) EP0605379B1 (de)
BE (1) BE1006567A6 (de)
DE (1) DE69312037T2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1016550A3 (fr) * 2005-03-16 2007-01-09 Ct Rech Metallurgiques Asbl Procede pour couler en continu un metal a resistance mecanique amelioree et produit obtenu par le procede.
WO2008070935A1 (fr) * 2006-12-12 2008-06-19 Centre De Recherches Metallurgiques Asbl - Centrum Voor Research In De Metallurgie Vzw Busette a jet creux pour coulee continue d'acier
WO2013144668A1 (en) 2012-03-28 2013-10-03 Arcelormittal Investigacion Y Desarrollo Sl Continuous casting process of metal
US9498822B2 (en) 2012-03-28 2016-11-22 Arcelormittal Investigacion Y Desarrollo, S.L. Continuous casting equipment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1014063A3 (fr) * 2001-03-22 2003-03-04 Ct De Rech S Metallurg Ass San Procede et dispositif pour couler en continu de l'acier presentant des oxydes fins.
US9004150B2 (en) 2005-03-16 2015-04-14 Centre de Recherches Metallurgiques ASBL—Centrum Voor Research in de Metallurgie VZW Method for continuous casting of a metal with improved mechanical strength and product obtained by said method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2150591A1 (en) * 1971-08-27 1973-04-13 Air Liquide Cooling of molten metal - by addition of particles of the same metal(s) at a considerably lower temp
IT1116425B (it) * 1977-04-18 1986-02-10 Centro Speriment Metallurg Sistema di raffreddamento e alligazione della massa fusa nella colata continua dell'acciaio
ATE71004T1 (de) * 1986-11-26 1992-01-15 Centre Rech Metallurgique Vorrichtung zum giessen eines pastenartigen metalles.

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
A.Ramacciotti et la., Increasing solidification rate in continuous casting by injection of powdered metal into the mould, Steelmaking Proceedings AIME Conference, Chicago, vol.61, 1978, pages 443-450 *
A.Spaccarotella, The FAST process for additional cooling and micro-alloying of continuously cast steel by metallic powders injection into the mould, Steelmaking Proceedings AIME Conference, Chicago vol.67, 1984, pages 53-61 *
L.Heaslip et al., Alloying of steel billets by the injection of solid particles during continuous casting, ISS-AIME 2nd Technology C.C.Conference, Chicago, Feb.1981, pages 54-63 *
L.Heaslip et al., Model studyof fluid flow and pressure distribution during SEN injection - Potential for reactive metal additions during continuous casting, Continuous Casting, AIME, vol.6, 1992, pages 99-114 *
M.A.Yur'ev et al., Possibilities of improving the quality of continuously cast billets and conventional ingots by the use of metal powders during teeming, Stal no.5, May 1968, pages 417-418 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1016550A3 (fr) * 2005-03-16 2007-01-09 Ct Rech Metallurgiques Asbl Procede pour couler en continu un metal a resistance mecanique amelioree et produit obtenu par le procede.
WO2008070935A1 (fr) * 2006-12-12 2008-06-19 Centre De Recherches Metallurgiques Asbl - Centrum Voor Research In De Metallurgie Vzw Busette a jet creux pour coulee continue d'acier
WO2013144668A1 (en) 2012-03-28 2013-10-03 Arcelormittal Investigacion Y Desarrollo Sl Continuous casting process of metal
US9498822B2 (en) 2012-03-28 2016-11-22 Arcelormittal Investigacion Y Desarrollo, S.L. Continuous casting equipment

Also Published As

Publication number Publication date
DE69312037D1 (de) 1997-08-14
BE1006567A6 (fr) 1994-10-18
EP0605379A1 (de) 1994-07-06
DE69312037T2 (de) 1998-02-12

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