EP0092477B1 - Verfahren und Vorrichtung zur Herstellung von Hohlblöcken aus Stahl - Google Patents

Verfahren und Vorrichtung zur Herstellung von Hohlblöcken aus Stahl Download PDF

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Publication number
EP0092477B1
EP0092477B1 EP83400746A EP83400746A EP0092477B1 EP 0092477 B1 EP0092477 B1 EP 0092477B1 EP 83400746 A EP83400746 A EP 83400746A EP 83400746 A EP83400746 A EP 83400746A EP 0092477 B1 EP0092477 B1 EP 0092477B1
Authority
EP
European Patent Office
Prior art keywords
ingot
core
mist
hollow
ingot mould
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
EP83400746A
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English (en)
French (fr)
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EP0092477A1 (de
Inventor
Philippe Dor
Daniel Martin
Jean-Claude Saint-Ignan
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.)
Creusot Loire SA
Original Assignee
Creusot Loire 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
Priority claimed from FR8206475A external-priority patent/FR2525131A1/fr
Priority claimed from FR8304718A external-priority patent/FR2543031B2/fr
Application filed by Creusot Loire SA filed Critical Creusot Loire SA
Priority to AT83400746T priority Critical patent/ATE16362T1/de
Publication of EP0092477A1 publication Critical patent/EP0092477A1/de
Application granted granted Critical
Publication of EP0092477B1 publication Critical patent/EP0092477B1/de
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/04—Casting hollow ingots

Definitions

  • the present invention relates to the manufacture of hollow steel ingots, and is particularly advantageous for casting large hollow ingots then used as blanks for forging large hollow parts.
  • the traditional technique for making hollow forgings such as ferrules, tubes, containers intended to be pressurized, etc., consists in subjecting a conventional ingot, therefore full, the following successive operations: blooming, crushing , drilling, drawing on mandrel, waxing.
  • the object of the present invention is to be able to produce a hollow ingot ensuring an energetic evacuation of the heat by the core during the solidification of the ingot, and avoiding the drawbacks mentioned above in a and b.
  • the present invention firstly relates to a method for manufacturing a hollow steel ingot, traditionally using an ingot mold placed on a source casting base, supplied by at least one source output, and further comprising, in the center of the mold, the installation of a vertical cylindrical core, comprising an outer cylindrical sheet metal jacket and a hollow inner mandrel, separated from each other by a regular interval continuously traversed by a cooling current constituted by a gas, or by a mist, or by the mixture of a gas and a mist, descending along the axis of the hollow mandrel and rising along the jacket in said regular interval, the temperature of l steel measured in a ladle just before it is poured into an ingot mold being at most equal to 1590 ° C., this method being characterized both in that said vertical cylindrical core is entirely metallic, in that the speed of supply of the ingot mold in ac ier liquid, at each source exit, is at most equal to 20 (twenty) cm / s, in that the ascending speed of
  • the optimum temperature for casting the steel is chosen according to the liquid of the grade of steel to be cast.
  • the source exit and rise speeds of the steel in the ingot mold are chosen taking into account the geometry of the assembly formed by the ingot mold and by the core.
  • the invention excludes the use of any liquid, but not that of droplets constituting a mist or a suspension in a gas.
  • the cooling element of the core is preferably chosen, but not necessarily, from the following bodies: ordinary air, carbon dioxide, water vapor, water mist.
  • the invention presents a possibility of modulating the flow rate and the nature of the cooling element, with a view to achieving variable, more or less vigorous cooling, which is optimal at each instant of the solidification of the ingot, for example decreasing during solidification of the ingot according to a very precise variation law for each type of ingot.
  • the invention thus gives complete control of the position, in the thickness of the ingot, of the end of solidification front.
  • the core is placed in the mold before introducing the molten metal, and this is then poured from bottom to top between the core and the mold.
  • the method according to the invention can also be applied under vacuum, if necessary.
  • the invention also relates to a device for manufacturing a hollow steel ingot, applying the process mentioned above with the features of claim 4.
  • the thickness of the cylindrical sheet liner is between 5 and 12 mm.
  • the previous device according to the invention may include exothermic or insulating plates forming weights, arranged at the upper level of the liquid metal, and attached, on the one hand, to the internal wall of the ingot mold and, on the other hand, to the jacket cylindrical of the nucleus.
  • One of the main advantages of the method and of the device according to the invention is constituted by the significant evacuation of heat through the core, during the entire solidification of the ingot, because the cylindrical jacket of the core is only one metal sheet, good conductor of heat, the internal face of which is in direct contact with the cooling current, and that the core has no refractory part, therefore no insulating part opposing the transfer of heat.
  • Another notable advantage of the invention is its flexibility and speed of response. Indeed, thanks to the small thickness of the cylindrical jacket, it is possible to quickly vary the rate of heat dissipation by the core by varying either the flow rate of the cooling current or its nature, for example by adding water mist to a pre-existing compressed air stream.
  • the flow rate of the cooling current or its nature for example by adding water mist to a pre-existing compressed air stream.
  • the modulation of the cooling rate for the core thanks to the invention, makes it possible to carry out a program for cooling the ingot according to its nature and according to its dimensions, ensuring optimal cooling at all times of the solidification of the
  • Another advantage of the process according to the invention is that the casting conditions are such that the cylindrical sheet liner incurs no risk of breakthrough.
  • An advantage of the device according to the invention is that, if the sheet metal jacket is to be renewed at each pouring, the central mandrel, solid and well cooled on its two faces, internal and external, can be reused a certain number of times.
  • Another advantage of the device according to the invention is that, at the end of solidification, while the sheet liner remains adherent to the solidified ingot, the central mandrel can be extracted without any difficulty, since a regular free interval separates it from the liner over its entire height.
  • an advantage of gas or mist cooling is that it does not present any risk of explosion, cn.ntrement water cooling.
  • the single figure represents a vertical section; by the axis of the entire device and the ingot.
  • the ingot mold 1 is placed on the source base 2, through which the liquid metal will arrive, coming from the casting mother 3 not shown, by a channel 4 and two orifices such as 5, 180 mm in diameter.
  • the ingot mold 1 is made of cast iron; it has a taper of about 40 mm / m relative to the vertical axis, and its large section is located at the top.
  • the jacket 6 is placed in mild steel sheet 10 mm thick and 1080 mm inside diameter, provided at its lower part with a metal bottom 7 of the same thickness, through which it rests in the middle of base 2.
  • the hollow mandrel 8 has an outside diameter of 980 mm and an inside diameter of 360 mm. It is significantly higher than the jacket 6. It is 50 mm apart. It is made of mild steel. It rests on shims such as 9, themselves placed on the bottom 7 of the jacket 6, and leaving between them free spaces, not visible in the figure.
  • the mandrel 8 must be well centered with respect to the sleeve 6, so that the interval of 50 mm is respected all around the mandrel.
  • a pipe 11 introduces compressed air, with or without water mist.
  • This compressed cooling air travels throughout the interior 12 of the mandrel 8, passes between the shims such as 9, and rises in the gap 13 existing between the jacket 6 and the mandrel 8, to exit in the open air annularly at 14 .
  • the compressed air flow introduced in 10 is nor 125 Nm 3 / min. This air flow rate is here kept constant throughout the duration of the solidification of the ingot, since this adjustment has been determined so that the end of solidification is located at mid-thickness of the hollow ingot. If you want to change the position of the end of solidification front, you just have to adjust the cooling air flow, or even add a little water vapor or water mist to the air.
  • exothermic plates 17, 18 form a counterweight for the head of the ingot 15.
  • the part immersed in the steel of the exothermic plates 17, 18 has a height of 400 mm.
  • the speed of exit of the liquid steel through the two source exits 5, on entering the ingot mold 1, is approximately 11 cm / s.
  • the rising speed of the ingot mold steel is maintained around 9 cm / min.
  • the duration of the source casting of this 86 t ingot is slightly more than 35 min.

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

Claims (6)

1. Verfahren zur Herstellung eines Hohlblocks (15) aus Stahl unter herkömmlicher Verwendung einer Kokille (1), die auf einer Gussbasis (2) für steigenden Guss bzw. Gespanngussbasis abgestellt bzw. aufgesetzt ist, die von wenigstens einem Gespanngussauslass (5) gespeist wird und die unter anderem im Zentrum der Kokille (1) den Einbau eines vertikalen zylindrischen Kernes umfasst, der einen zylindrischen Aussenmantel (6) aus Blech und einem inneren hohlen Dorn (8) aufweist, die voneinander durch einen regelmässigen Zwischenraum (13) getrennt sind, der permanent von einem Kühlstrom durchströmt wird, der aus einem Gas, einem Nebel oder aus einer Mischung aus einem Gas und einem Nebel besteht und entlang der Achse des hohlen Dornes (8) absteigt und entlang dem Mantel (6) in dem genannten regelmässigen Zwischenraum (13) wieder aufsteigt, wobei die Temperatur des Stahls gemessen in der Giesspfanne knapp vor dem Vergiessen in die Kokille höchstens 1590° C beträgt und dieses Verfahren gleichzeitig dadurch gekennzeichnet ist, dass der genannten zylindrische Kern ganz aus Metall besteht, dass die Zufuhrgeschwindigkeit zur Kokille (1) an flüssigem Stahl an jedem Gespanngussauslass (5) höchstens 20 cm/s beträgt, dass die aufsteigende Geschwindigkeit des Stahls in der Kokille höchstens 14 cm/min beträgt und dass der Dorn (8) nach dem Erstarren des Blocks (15) unversehrt herausgezogen werden kann, während der Mantel (6) am Block (15) haften bleibt und an diesen nicht angeschweisst ist.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Kühlelement des Kernes unter folgenden Grundstoffen bzw. Körpern gewählt wird: gewöhnliche Luft, Kohlendioxid, Wasserdampf und Wassernebel.
3. Verfahren nach einem der Ansprüche 1 und 2, unter Anwendung des steigenden Gusses bzw. Gespanngusses, dadurch gekennzeichnet, dass der Kern (6,7,8,9) in der Kokille vor dem Einbringen des geschmolzenen Metalls angeordnet wird und dass das Metall darauf von unten nach oben zwischen dem Kern und der Kokille (1 ) vergossen wird.
4. Vorrichtung zur Herstellung eines Stahlhohlblocks unter Anwendung eines der Verfahren nach einem der Ansprüche 1 bis 3, mit einer Kokille (1), die auf eine Gussbasis (2) für steigenden Guss bzw. Gespanngussbasis aufgesetzt ist und von wenigstens einem Gespanngussauslass (5) gespeist wird und ausserdem einen vertikalen zylindrischen Kern umfasst, der im Zentrum der Kokille angeordnet ist und einen zylindrischen Aussenmantel (6) aus Blech und einen inneren hohlen Dorn (8) aufweist, die voneinander durch einen regelmässigen Zwischenraum (13) getrennt sind, der permanent von einem Kühlstrom durchströmt wird, der aus einem Gas, einem Nebel oder einer Mischung aus einem Gas und einem Nebel besteht, der entlang der Achse des hohlen Dornes (8) absteigt und entlang dem Mantel (6) entlang dem genannten regelmässigen Zwischenraum (13) aufsteigt, wobei die Vorrichtung dadurch gekennzeichnet ist, dass der genannte vertikale zylindrische Kern ganz aus Metall besteht und aus einem verbrauchbaren zylindrischen Blechmantel (6) besteht, der eine Dicke von 4-20 mm besitzt, an seinem unteren Ende durch einen Metallboden (7) verschlossen ist, der auf der Basis (2) aufruht, und dass der hohle Metalldorn (8) wiederverwendbar ist und auf genannten Metallboden (7) unter Zwischenschaltung von Unterlegkeilen bzw. -klötzen (9) aufruht, die zwischen sich freie Durchlässe für den genannten Kühlstrom aus Gas, Nebel oder einer Mischung aus einem Gas und einem Nebel freilassen.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Dicke des zylindrischen Mantels (6) 5-12 mm beträgt.
6. Vorrichtung nach einem der Ansprüche 4 und 5, dadurch gekennzeichnet, dass exotherme oder isolierende Platten (17, 18), die verlorene obere Giessköpfe bilden, auf dem oberen Niveau (16) des flüssigen Metalls angeordnet und einerseits (17) an die Innenwand der Kokille (1) und anderseits (18) an den zylindrischen Mantel (6) des Kernes angebaut bzw. angelehnt sind.
EP83400746A 1982-04-15 1983-04-15 Verfahren und Vorrichtung zur Herstellung von Hohlblöcken aus Stahl Expired EP0092477B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83400746T ATE16362T1 (de) 1982-04-15 1983-04-15 Verfahren und vorrichtung zur herstellung von hohlbloecken aus stahl.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8206475A FR2525131A1 (fr) 1982-04-15 1982-04-15 Procede et dispositif de fabrication d'un lingot d'acier creux
FR8206475 1982-04-15
FR8304718 1983-03-23
FR8304718A FR2543031B2 (fr) 1983-03-23 1983-03-23 Procede et dispositif de fabrication d'un lingot d'acier creux

Publications (2)

Publication Number Publication Date
EP0092477A1 EP0092477A1 (de) 1983-10-26
EP0092477B1 true EP0092477B1 (de) 1985-11-06

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EP83400746A Expired EP0092477B1 (de) 1982-04-15 1983-04-15 Verfahren und Vorrichtung zur Herstellung von Hohlblöcken aus Stahl

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EP (1) EP0092477B1 (de)
KR (1) KR840004375A (de)
DE (1) DE3361154D1 (de)
ES (2) ES8402188A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043748B4 (de) * 2000-09-05 2004-01-15 W. C. Heraeus Gmbh & Co. Kg Zylinderförmiges Sputtertarget, Verfahren zu seiner Herstellung und Verwendung

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2557820B1 (fr) * 1984-01-10 1987-05-07 Pont A Mousson Dispositif d'alimentation en metal liquide pour installation de coulee continue verticale d'un tube metallique, notamment en fonte
JPS6163342A (ja) * 1984-09-03 1986-04-01 Kawasaki Steel Corp 中空鋼塊の製造方法およびその装置
US4759399A (en) * 1986-05-15 1988-07-26 Kawasaki Steel Corporation Method and apparatus for producing hollow metal ingots
GB2193914B (en) * 1986-08-19 1990-08-15 Metal Castings Casting
FR2676670B1 (fr) * 1991-05-23 1996-01-05 Creusot Loire Procede et dispositif de coulee d'un lingot creux metallique.
US5702628A (en) * 1992-07-30 1997-12-30 Nemoto; Masaru Method of fabricating article by using non-sand core and article produced thereby, and core structure
GB2269773B (en) * 1992-07-30 1996-05-22 Masaru Nemoto Core for mould
DE10063383C1 (de) * 2000-12-19 2002-03-14 Heraeus Gmbh W C Verfahren zur Herstellung eines Rohrtargets und Verwendung
DE10253319B3 (de) * 2002-11-14 2004-05-27 W. C. Heraeus Gmbh & Co. Kg Verfahren zum Herstellen eines Sputtertargets aus einer Si-Basislegierung, sowie die Verwendung des Sputtertargets
ATE343403T1 (de) 2003-02-10 2006-11-15 Heraeus Gmbh W C Verbesserte metalllegierung für medizinische geräte und implantate
KR101311580B1 (ko) * 2009-03-27 2013-09-26 티타늄 메탈스 코포레이션 중공 주괴의 반연속 주조 방법 및 장치
WO2013003458A1 (en) 2011-06-27 2013-01-03 Soleras Ltd. Sputtering target
US11001529B2 (en) * 2018-05-24 2021-05-11 Silfex, Inc. Crucible for casting near-net shape (NNS) silicon

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE571778C (de) * 1930-07-30 1933-03-04 Osnabruecker Kupfer Und Drahtw Verfahren zum Giessen von Hohlbloecken
GB1301922A (de) * 1969-02-18 1973-01-04
DE1944149A1 (de) * 1969-08-30 1971-03-04 Kocks Gmbh Friedrich Verfahren und Vorrichtung zum Giessen von Hohlbloecken
US4278124A (en) * 1978-04-11 1981-07-14 Kawasaki Steel Corporation Method of producing hollow steel ingot and apparatus therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043748B4 (de) * 2000-09-05 2004-01-15 W. C. Heraeus Gmbh & Co. Kg Zylinderförmiges Sputtertarget, Verfahren zu seiner Herstellung und Verwendung

Also Published As

Publication number Publication date
KR840004375A (ko) 1984-10-15
EP0092477A1 (de) 1983-10-26
ES8403762A1 (es) 1984-04-01
ES521441A0 (es) 1984-01-16
DE3361154D1 (en) 1985-12-12
ES523506A0 (es) 1984-04-01
ES8402188A1 (es) 1984-01-16

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