EP0515271A1 - Verfahren und Vorrichtung zum Giessen eines hohlen Stahlblockes unter Verwendung eines steuerbaren gekühlten Kerns - Google Patents

Verfahren und Vorrichtung zum Giessen eines hohlen Stahlblockes unter Verwendung eines steuerbaren gekühlten Kerns Download PDF

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Publication number
EP0515271A1
EP0515271A1 EP92401375A EP92401375A EP0515271A1 EP 0515271 A1 EP0515271 A1 EP 0515271A1 EP 92401375 A EP92401375 A EP 92401375A EP 92401375 A EP92401375 A EP 92401375A EP 0515271 A1 EP0515271 A1 EP 0515271A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
ingot
hollow
flow
central channel
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.)
Withdrawn
Application number
EP92401375A
Other languages
English (en)
French (fr)
Inventor
Daniel Martin
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
Creusot Loire Industrie SA
Original Assignee
Creusot Loire SA
Creusot Loire Industrie 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
Application filed by Creusot Loire SA, Creusot Loire Industrie SA filed Critical Creusot Loire SA
Publication of EP0515271A1 publication Critical patent/EP0515271A1/de
Withdrawn legal-status Critical Current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
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/04—Casting hollow ingots

Definitions

  • the invention relates to a method of casting a metal hollow ingot allowing to improve and regulate the cooling of a hollow core used to form the central recess of the hollow ingot.
  • the object of the invention is to make it possible to modulate significantly the efficiency of the cooling during the solidification of the ingot, which has the advantage of giving the means to adjust the position of the end of solidification front.
  • the object of the invention is a method for casting an ingot of a metal hollow ingot, in particular steel, into a mold, in which the central recess of the hollow ingot is formed using a core placed in the mold and constituted by a cylindrical metal mandrel.
  • hollow axially crossed by a central channel and an external tubular jacket placed in a coaxial arrangement around the mandrel delimiting a peripheral space around the mandrel and the core is cooled during the solidification of the ingot after pouring of liquid metal into the ingot mold by circulation of a coolant flow in the mandrel and in the peripheral space characterized in that the coolant flow cooling consists of a main flow of fluid circulated in the mandrel channel and by an additional flow of fluid injected into the main flow.
  • the first and the second cooling stream consist of at least one gas.
  • the gas is preferably air, nitrogen or carbon dioxide or a mixture of these gases.
  • the additional flow comprises at least one zone in which the second fluid circulates in supersonic regime and in which a shock wave is formed.
  • the fluid injected into the supersonic regime zone is preferably water.
  • the flow rate of the injected fluid is adjustable.
  • the invention also relates to a device for implementing the casting method according to the invention of the type comprising an ingot mold mounted on a base plate and a core comprising a hollow mandrel axially traversed by a central channel and an external jacket coaxial with the mandrel, arranged vertically in the ingot mold, in which a cooling fluid circulates;
  • the device comprises a means for injecting an additional cooling fluid into the central channel of the mandrel, constituted by an axis fixed transversely in the mandrel, so as to pass through its central channel without completely closing it and comprising a hollow central part connected to a cooling fluid supply means and an opening communicating the hollow central part with the central channel of the mandrel.
  • this opening forms a nozzle, the axis of which coincides with the longitudinal axis of the mandrel and which is oriented towards the lower part of the mandrel.
  • This nozzle successively comprises from top to bottom a converging part, a neck and a diverging part.
  • a supply of vaporizable fluid opens into the divergent part of the nozzle, upstream of the zone where a shock wave is likely to form.
  • the device represented in FIG. 1 corresponds to the example of a source casting in which an ingot mold 1 is placed on a base plate 2 provided with a source 3 and a supply channel 4 opening out through the base plate 2 by tap holes 5.
  • a core generally identified by 16 comprising a jacket 6 and a hollow mandrel 8 resting on the bottom 7 of the jacket 6, with interposition of discontinuous shims 9; a free space 13 is provided between the mandrel and the jacket.
  • the mandrel 8 is provided at its upper part with a hollow handling pin 17 which will be described in detail below.
  • a main flow of a first cooling fluid for example air, is introduced into the upper part of the mandrel and circulates from top to bottom in the central part of the latter, then comes out going up in space 13; this flow is provided by a fan not shown.
  • An additional flow of a second coolant which may also be air is introduced by the handling axis and is added to the main flow circulating in the hollow part of the mandrel.
  • the handling axis is cylindrical and passes through the mandrel perpendicular to the main axis of the latter. It also crosses the central channel 18 of the mandrel without, however, completely obstructing it.
  • the handling axis 17 comprises, along its axis, a cylindrical hole 19 which, starting from one end extends to the part which is in the channel 18.
  • the axis of handling 17 includes an opening 20 into which is inserted a nozzle 21 whose axis coincides with the axis of the channel 18 of the mandrel and which is oriented towards the lower part of the mandrel 8 and of the ingot mold 1.
  • This nozzle 21 has a converging part 22, a neck 23 and a diverging part 24. In the diverging part, a fluid inlet 25 is provided.
  • the hole 19 of the handling axis 17 is supplied, for example, with air. Passing through the convergent, this air arrives at the neck at a speed equal to the speed of sound and in the diverging part is accelerated to supersonic speeds. This forms the additional flow.
  • Another advantage is the additional flow. Indeed, at the outlet of the nozzle, this flow creates an ejector effect so that, if the fan supplying the main flow breaks down, air is drawn into the hollow part of the mandrel and the cooling of the core can continue until the end of solidification.
  • the ingot is poured at source and the core placed in the ingot mold before casting the steel.
  • the steel can also be poured into the ingot mold first and the core can then be introduced into the molten metal 15.
  • the ingot can be poured under vacuum.
  • the cooling fluids taken as an example are air for the main flow and the additional flow and water for the injected fluid. But for the main and additional flows other gases are possible; for example nitrogen, or carbon dioxide. Other vaporizable fluids than water can also be injected into the additional flow.
  • the device for supplying the additional flow is not necessarily a handling axis, it can be a device whose sole purpose is to introduce the additional flow.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP92401375A 1991-05-23 1992-05-20 Verfahren und Vorrichtung zum Giessen eines hohlen Stahlblockes unter Verwendung eines steuerbaren gekühlten Kerns Withdrawn EP0515271A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9106223 1991-05-23
FR9106223A FR2676671B1 (fr) 1991-05-23 1991-05-23 Procede et dispositif de coulee d'un lingot creux utilisant un noyau refroidi de maniere reglable.

Publications (1)

Publication Number Publication Date
EP0515271A1 true EP0515271A1 (de) 1992-11-25

Family

ID=9413052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92401375A Withdrawn EP0515271A1 (de) 1991-05-23 1992-05-20 Verfahren und Vorrichtung zum Giessen eines hohlen Stahlblockes unter Verwendung eines steuerbaren gekühlten Kerns

Country Status (3)

Country Link
EP (1) EP0515271A1 (de)
JP (1) JPH0655244A (de)
FR (1) FR2676671B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102935493A (zh) * 2012-11-20 2013-02-20 天津重型装备工程研究有限公司 一种单套筒强制冷却制造大型空心钢锭的方法
CN111136227A (zh) * 2020-02-12 2020-05-12 山东宝鼎重工实业有限公司 一种消除钢锭带状组织的冷却工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011048279A1 (fr) 2009-10-21 2011-04-28 Arcelormittal Investigacion Y Desarrollo, S.L. Procede pour fabriquer un lingot metallique comportant un alesage, lingot et dispositif de moulage associes
FR2958194B1 (fr) 2010-04-02 2012-06-15 Creusot Forge Procede et dispositif pour la fabrication d'une virole bi-materiaux, et virole ainsi realisee.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB908832A (en) * 1958-01-22 1962-10-24 Mannesmann Ag Casting apparatus
EP0246040A2 (de) * 1986-05-15 1987-11-19 Kawasaki Steel Corporation Verfahren und Vorrichtung zum Herstellen von Hohlblöcken

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5788947A (en) * 1980-11-21 1982-06-03 Kawasaki Steel Corp Casting method for thin-walled hollow steel ingot for pipe making
JPS61276744A (ja) * 1985-06-01 1986-12-06 Kawasaki Steel Corp 中空鋼塊の製造方法およびその装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB908832A (en) * 1958-01-22 1962-10-24 Mannesmann Ag Casting apparatus
EP0246040A2 (de) * 1986-05-15 1987-11-19 Kawasaki Steel Corporation Verfahren und Vorrichtung zum Herstellen von Hohlblöcken

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 140 (M-586)(2587) 8 Mai 1987 & JP-A-61 276 744 ( KAWASAKI STEEL CORP. ) 6 Décembre 1986 *
PATENT ABSTRACTS OF JAPAN vol. 6, no. 181 (M-156)(1059) 17 Septembre 1982 & JP-A-57 088 947 ( KAWASAKI SEITETSU K.K. ) 3 Juin 1982 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102935493A (zh) * 2012-11-20 2013-02-20 天津重型装备工程研究有限公司 一种单套筒强制冷却制造大型空心钢锭的方法
CN111136227A (zh) * 2020-02-12 2020-05-12 山东宝鼎重工实业有限公司 一种消除钢锭带状组织的冷却工艺
CN111136227B (zh) * 2020-02-12 2021-07-23 山东宝鼎重工实业有限公司 一种消除钢锭带状组织的冷却工艺

Also Published As

Publication number Publication date
FR2676671B1 (fr) 1994-01-14
FR2676671A1 (fr) 1992-11-27
JPH0655244A (ja) 1994-03-01

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