EP2490842B1 - Verfahren zur herstellung eines metallblocks mit einer bohrung sowie entsprechender metallblock und pressform - Google Patents

Verfahren zur herstellung eines metallblocks mit einer bohrung sowie entsprechender metallblock und pressform Download PDF

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Publication number
EP2490842B1
EP2490842B1 EP09768538.2A EP09768538A EP2490842B1 EP 2490842 B1 EP2490842 B1 EP 2490842B1 EP 09768538 A EP09768538 A EP 09768538A EP 2490842 B1 EP2490842 B1 EP 2490842B1
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EP
European Patent Office
Prior art keywords
liquid metal
ingot
metal
liquid
steel
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.)
Active
Application number
EP09768538.2A
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English (en)
French (fr)
Other versions
EP2490842A1 (de
Inventor
Thierry Faudan
Jean-Luc Dabin
Gilbert Lacagne
Maxime Leroy
Bruno Savalli
Franck Braconnier
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.)
ArcelorMittal Investigacion y Desarrollo SL
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ArcelorMittal Investigacion y Desarrollo SL
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Application filed by ArcelorMittal Investigacion y Desarrollo SL filed Critical ArcelorMittal Investigacion y Desarrollo SL
Priority to PL09768538T priority Critical patent/PL2490842T3/pl
Priority to SI200930846T priority patent/SI2490842T1/sl
Publication of EP2490842A1 publication Critical patent/EP2490842A1/de
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Publication of EP2490842B1 publication Critical patent/EP2490842B1/de
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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
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/06—Ingot moulds or their manufacture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
    • 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 a metal ingot having a longitudinal bore and in particular a steel ingot for producing forged annular parts.
  • An object of the present invention is to overcome these disadvantages by providing a means for obtaining forging ingots having a longitudinal bore, while having a sufficiently low hydrogen content from the beginning, in order to be able to guarantee conditions of hydrogen content. low on the finished parts, without many thermal degassing treatments being necessary.
  • the invention further relates to a steel ingot comprising a longitudinal bore has been obtained by vacuum casting.
  • the ingot may for example have a generally rotational shape.
  • the ingot may have a hydrogen content of less than 1.2 ppm, preferably less than or equal to 1 ppm and more preferably less than or equal to 0.8 ppm.
  • FIG. 1 there is shown an installation for vacuum casting a metal ingot, and in particular a steel ingot, generally of revolution shape and having a longitudinal central bore.
  • the mold 1 rests on a wedge 17 whose height is adapted so that the mold is completely disposed inside the vacuum casting chamber 5, which vacuum casting chamber 5 rests under the ground 16.
  • the mold 1 comprises a bottom marked generally by 27 comprising a wedging means 18 and a cast iron counterplate 20.
  • the bottom is adapted to obtain the desired ingot height.
  • the wedging means is for example cast iron.
  • the space between the wedging means and the side wall of the mold is filled with dry sand 19.
  • the mold 2, the core 4 and the bottom 27 define a generally annular mold cavity 3A intended to receive the liquid metal.
  • a means 11A for receiving and distributing the liquid steel which is introduced into the vacuum chamber is disposed at the upper part of the mold.
  • This means 11A for receiving and distributing the liquids is constituted by a cup-shaped distributor 12 consisting of tabular alumina, which comprises at its periphery channels 13 opening vertically above the molding cavity 3A.
  • the channels 13 are intended to drive the liquid steel which is contained inside the distributor 12 in the molding cavity 3A.
  • These channels 13. are of refractory material and are contained in housings 14 filled with sand. They rest on a support plate 15 which bears on the upper part of the vertical core 4 and on the upper face of the mold 2.
  • the distributor 12 comprises an inner bowl 121 from which four channels 13 which are contained in four holding boxes containing sand 14 and which are supported by the arms 122 of the support plate 15. These arms 122, which are arranged in a cross, rest on the top of the mold 2.
  • the mold 1 comprises massaging plates 22 which surround a on the other hand, the mold 2.
  • massing plates 22 are known in themselves to those skilled in the art.
  • the vacuum casting chamber 5 is evacuated by pumping through the pipe 7 using a vacuum pumping installation known in itself. Even of the skilled person. Thus, the pressure of the atmosphere within the vacuum chamber 5 is lowered to a value that can fall below 0.5 Torr, and better below 0.2 Torr, and better still below 0.1 Torr.
  • the vacuum is achieved in the enclosure, there is a steel pocket above the intermediate pocket 10, it pours liquid steel in the pocket intermediate 10.
  • the drawer nozzle 11 is opened, which makes it possible to introduce liquid steel inside the vacuum enclosure 5.
  • This liquid steel forms a first jet 50 which forms a reserve 51 of liquid steel in the bowl 121 of the distributor 12.
  • the reserve 51 of liquid steel then flows through the channels 13 to form secondary jets 52 which introduce liquid steel inside the molding cavity 3A and which gradually fill this molding cavity 3 forming a volume of liquid steel 53 inside the molding cavity 3A.
  • it may, however, from a liquid steel having a hydrogen content greater than 1.5 ppm, while still obtaining an ingot whose hydrogen content will be substantially less than 0.8 ppm.
  • the molding cavity 3A filled with liquid steel it proceeds in a known manner by allowing the ingot to solidify inside the vacuum casting chamber 5.
  • a metal ingot in particular a steel ingot, and in particular low alloy steel, having high metal properties, which can be used to manufacture forgings for heavy equipment, such as plant vessels, is obtained.
  • the ingot has a very low hydrogen content, which can be guaranteed less than 1, 2 ppm and even less than 1 ppm, and better still, possibly lower than 0.8 ppm.
  • the means 11A for receiving and distributing the liquid metal consists of a distributor 12 comprising a bowl and which bears on the central core 4.
  • the essential is to achieve at least the formation of two successive streams of liquid metal, under vacuum, which can burst to ensure two successive degassing operations.
  • FIG 3 another alternative embodiment is shown in which the mold 2 is surmounted by a receiving and distributing means 11 'of the jet 50 of liquid metal which is introduced into the vacuum casting chamber.
  • This means 11 ' is constituted by a cone 110 bearing on the central core 4.
  • the liquid metal which comes from the jet 50 flows on an area 51' which is on the outer periphery of the cone 110, then opens into the cavity of molding 3A forming jets 52 'which are exploded and which can ensure a very good degassing.
  • the cone 110 of the liquid steel receiving and distributing means is shown, which is completed by a U-shaped jumper 111 which is intended to hold the cone 110.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (13)

  1. Verfahren zum Herstellen eines eine Längsbohrung aufweisenden Gussblocks durch Gießen eines flüssigen Metalls in eine Form (1), die einen im Ganzen gesehen ringförmigen Formhohlraum (3A) aufweist, der von einer Kokille (2), die sich senkrecht über einem Träger (17) erstreckt, wobei die Kokille einen nach oben offenen Hohlraum (3) umfasst, von einem senkrecht im Inneren des Hohlraums (3) angeordneten Kern (4) und von einem Boden (27) begrenzt wird,
    dadurch gekennzeichnet, dass:
    - die Form (1) im Inneren einer unter Vakuum stehenden Gießumhüllung (5) angeordnet wird, die in ihrem oberen Bereich ein Mittel (9) zum Einführen von flüssigem Metall aufweist;
    - ein Mittel (11A, 11') zur Aufnahme und zur Verteilung von flüssigem Metall, das angepasst ist, den in die unter Vakuum stehende Gießumhüllung (5) eingeführten flüssigen Stahl aufzunehmen und das flüssige Metall in dem Formhohlraum (3A) wieder zu verteilen, wobei das Mittel zur Aufnahme und zur Verteilung im oberen Bereich des Formhohlraums (3A) angeordnet ist,
    und dass
    - das flüssige Metall in die unter Vakuum stehende Gießumhüllung (5) eingeführt wird, derart, dass ein erster Strom (50) von flüssigem Stahl unter Vakuum gebildet wird, um das flüssige Metall auf das Mittel (11A, 11') zur Aufnahme und zur Verteilung zu leiten und dass mindestens ein zweiter Strom von flüssigem Stahl (52) unter Vakuum gebildet wird, der von dem Mittel (11A, 11') zur Aufnahme und Verteilung herkommt und in dem Formhohlraum (3A) endet, um den Formhohlraum (3A) mit flüssigem Metall zu füllen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Mittel (11A) zur Aufnahme und zur Verteilung des flüssigen Metalls ein Verteiler (12) in Form einer Wanne ist, der mindestens einen in den Formhohlraum (3A) mündenden Entleerungskanal (13) aufweist.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Mittel (11') zur Aufnahme und Verteilung des flüssigen Metalls ein Kegel (110) aus hitzebeständigem Material ist, dessen Spitze ausgebildet ist, um den ersten Strom von flüssigem Stahl aufzunehmen.
  4. Verfahren nach einem beliebigen der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Mittel (11A, 11') zur Aufnahme und Verteilung des flüssigen Metalls auf dem oberen Ende des Kerns (4) abgestützt wird.
  5. Verfahren nach einem beliebigen der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Kern (4) aus einem im Wesentlichen zylindrischen Körper (41) aus hitzebeständigem Material gebildet wird, der eine axiale metallische Armierung (42) aufweist.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die Armierung des Kerns ein Metallrohr (42), beispielsweise aus Stahl ist, dessen Wand eine Vielzahl von Löchern aufweist.
  7. Verfahren nach einem beliebigen der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Form im Wesentlichen eine Rotationsform ist.
  8. Verfahren nach einem beliebigen der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das flüssige Metall flüssiger Stahl ist.
  9. Verfahren nach einem beliebigen der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Druck in der unter Vakuum stehenden Formumhüllung (5) kleiner als 0,5 Torr ist.
  10. Stahlgussblock, eine Längsbohrung umfassend, dadurch gekennzeichnet, dass er durch Gießen unter Vakuum erhalten wird und dass er einen Gehalt an Wasserstoff kleiner als 1,2 ppm aufweist.
  11. Vorrichtung (1) zum Gießen unter Vakuum des Metallgussblocks, der eine Längsbohrung aufweist, dadurch gekennzeichnet, dass sie umfasst:
    - eine Form (1), die einen Formhohlraum (3A) aufweist, der von
    - einer Kokille (2);
    - einem armierten Kern (4) aus hitzeständigem Material, der in der Kokille (2) angeordnet ist; und
    - einem Boden (27)
    begrenzt ist;
    - und ein Mittel (11A, 11') zur Aufnahme und zur Verteilung von flüssigem Metall, das in Abstützung auf dem oberen Ende des Kerns angeordnet ist.
  12. Vorrichtung zum Gießen nach Anspruch 11, dadurch gekennzeichnet, dass das Mittel (11A) zur Aufnahme und zur Verteilung des flüssigen Metalls ein Verteiler (12) in Form einer Wanne ist, der mindestens einen in den Formhohlraum (3A) mündenden Entleerungskanal (13) aufweist.
  13. Vorrichtung zum Gießen (1) nach Anspruch 11, dadurch gekennzeichnet, dass das Mittel (11') zur Aufnahme und zur Verteilung des flüssigen Metalls ein Kegel (110) aus hitzebeständigem Material ist, dessen Spitze ausgebildet ist, um den ersten Strom von flüssigem Stahl aufzunehmen.
EP09768538.2A 2009-10-21 2009-10-21 Verfahren zur herstellung eines metallblocks mit einer bohrung sowie entsprechender metallblock und pressform Active EP2490842B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL09768538T PL2490842T3 (pl) 2009-10-21 2009-10-21 Sposób wytwarzania metalowego wlewka zawierającego otwór, odpowiedni wlewek i urządzenie do odlewania
SI200930846T SI2490842T1 (sl) 2009-10-21 2009-10-21 Postopek izdelave kovinskega ingota, obsegajočega luknjo, tovrsten ingot in livarska priprava za izdelavo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2009/052014 WO2011048279A1 (fr) 2009-10-21 2009-10-21 Procede pour fabriquer un lingot metallique comportant un alesage, lingot et dispositif de moulage associes

Publications (2)

Publication Number Publication Date
EP2490842A1 EP2490842A1 (de) 2012-08-29
EP2490842B1 true EP2490842B1 (de) 2013-12-11

Family

ID=42497515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09768538.2A Active EP2490842B1 (de) 2009-10-21 2009-10-21 Verfahren zur herstellung eines metallblocks mit einer bohrung sowie entsprechender metallblock und pressform

Country Status (13)

Country Link
US (2) US8875776B2 (de)
EP (1) EP2490842B1 (de)
JP (1) JP5552170B2 (de)
KR (1) KR101443469B1 (de)
CN (1) CN102655965B (de)
BR (1) BR112012009542A2 (de)
CA (1) CA2778193C (de)
ES (1) ES2448547T3 (de)
PL (1) PL2490842T3 (de)
RU (1) RU2526649C2 (de)
SI (1) SI2490842T1 (de)
UA (1) UA104222C2 (de)
WO (1) WO2011048279A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2526649C2 (ru) * 2009-10-21 2014-08-27 Арселормитталь Инвестигасьон И Десарролло С.Л. Способ изготовления металлического слитка, содержащего отверстие, соответствующие слиток и устройство литья
CN104275450B (zh) * 2014-10-11 2016-05-18 清华大学 一种底注式浇注铸锭的方法及专用装置
CN104785757B (zh) * 2015-03-27 2016-11-30 辽宁科技大学 一种多芯还原多包共浇复合浇铸大型钢锭的方法及装置

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US3310850A (en) 1963-12-13 1967-03-28 Rheinstahl Huettenwerke Ag Method and apparatus for degassing and casting metals in a vacuum
JPS5028898B1 (de) * 1970-01-20 1975-09-19
JPS5638295B2 (de) * 1974-05-01 1981-09-05
JPS54134034A (en) 1978-04-11 1979-10-18 Kawasaki Steel Co Production of hollow steel block
US4278124A (en) 1978-04-11 1981-07-14 Kawasaki Steel Corporation Method of producing hollow steel ingot and apparatus therefor
JPS54143703A (en) 1978-04-28 1979-11-09 Kobe Steel Ltd Vacuum induction melting apparauts
JPS5633164A (en) * 1979-08-22 1981-04-03 Mitsubishi Steel Mfg Co Ltd Manufacture of steel ingot by remelting
SU1088868A1 (ru) 1983-02-14 1984-04-30 Предприятие П/Я А-3681 Способ получени полого слитка
SU1359062A1 (ru) 1986-05-05 1987-12-15 Волгоградский Политехнический Институт Устройство дл получени полых слитков
US5052469A (en) * 1988-09-20 1991-10-01 Showa Denko Kabushiki Kaisha Method for continuous casting of a hollow metallic ingot and apparatus therefor
FR2676670B1 (fr) 1991-05-23 1996-01-05 Creusot Loire Procede et dispositif de coulee d'un lingot creux metallique.
FR2676671B1 (fr) 1991-05-23 1994-01-14 Creusot Loire Industrie Procede et dispositif de coulee d'un lingot creux utilisant un noyau refroidi de maniere reglable.
JPH05318027A (ja) 1992-05-25 1993-12-03 Kobe Steel Ltd 鋳造方法
JPH06190538A (ja) * 1992-12-24 1994-07-12 Hitachi Ltd 低水素鋼塊の製造方法
JP4427439B2 (ja) * 2004-12-02 2010-03-10 株式会社神戸製鋼所 中空状の鍛造用鋼材の製法および筒状鍛造品の製法
JP4443430B2 (ja) * 2005-01-25 2010-03-31 東邦チタニウム株式会社 電子ビーム溶解装置
RU2526649C2 (ru) * 2009-10-21 2014-08-27 Арселормитталь Инвестигасьон И Десарролло С.Л. Способ изготовления металлического слитка, содержащего отверстие, соответствующие слиток и устройство литья

Also Published As

Publication number Publication date
CN102655965A (zh) 2012-09-05
WO2011048279A1 (fr) 2011-04-28
UA104222C2 (ru) 2014-01-10
JP2013508162A (ja) 2013-03-07
KR20120080637A (ko) 2012-07-17
JP5552170B2 (ja) 2014-07-16
RU2526649C2 (ru) 2014-08-27
PL2490842T3 (pl) 2014-05-30
US9586258B2 (en) 2017-03-07
BR112012009542A2 (pt) 2020-08-18
US8875776B2 (en) 2014-11-04
KR101443469B1 (ko) 2014-10-14
ES2448547T3 (es) 2014-03-14
US20150013931A1 (en) 2015-01-15
US20120269672A1 (en) 2012-10-25
CA2778193A1 (fr) 2011-04-28
EP2490842A1 (de) 2012-08-29
RU2012120723A (ru) 2013-11-27
CA2778193C (fr) 2014-10-14
SI2490842T1 (sl) 2014-03-31
CN102655965B (zh) 2016-02-24

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