EP0195793B1 - Procede de reglage du niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale continue - Google Patents

Procede de reglage du niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale continue Download PDF

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Publication number
EP0195793B1
EP0195793B1 EP85904639A EP85904639A EP0195793B1 EP 0195793 B1 EP0195793 B1 EP 0195793B1 EP 85904639 A EP85904639 A EP 85904639A EP 85904639 A EP85904639 A EP 85904639A EP 0195793 B1 EP0195793 B1 EP 0195793B1
Authority
EP
European Patent Office
Prior art keywords
level
field
metal
mould
strength
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
EP85904639A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0195793A1 (fr
Inventor
Charles Vives
Bernard Forest
Jean-Pierre Riquet
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.)
Cegedur Societe de Transformation de lAluminium Pechiney SA
Original Assignee
Cegedur Societe de Transformation de lAluminium Pechiney 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.)
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Publication date
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Application filed by Cegedur Societe de Transformation de lAluminium Pechiney SA filed Critical Cegedur Societe de Transformation de lAluminium Pechiney SA
Priority to AT85904639T priority Critical patent/ATE30218T1/de
Publication of EP0195793A1 publication Critical patent/EP0195793A1/fr
Application granted granted Critical
Publication of EP0195793B1 publication Critical patent/EP0195793B1/fr
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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
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/02—Use of electric or magnetic effects
    • 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
    • B22D11/114—Treating the molten metal by using agitating or vibrating means
    • B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
    • 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
    • B22D11/16—Controlling or regulating processes or operations

Definitions

  • the invention relates to a method for adjusting the level of the contact line of the free surface of the metal with an ingot mold in a vertical casting.
  • French patent 1,398,526 teaches the use of a strip of fiberfrax bonded to the ingot mold so as to reduce the height of metal in contact with the ingot mold, and therefore to reduce the effects due to indirect cooling.
  • this reduction in height cannot be fixed once and for all, since it depends in particular on the speed of casting.
  • Another solution consists in using molds with a striated interior surface by means of which the thickness of the cortical layer is reduced by more than 30% when aluminum 1050 is poured for example.
  • molds with a striated interior surface by means of which the thickness of the cortical layer is reduced by more than 30% when aluminum 1050 is poured for example.
  • HAT TOP loaded casting with enhancement
  • French patent 2,417,357 has claimed a process in which the axial length of the part of the ingot mold in contact with the liquid metal is varied by using a cuff sliding on the inner wall of the ingot mold.
  • Such a system has the disadvantage during untimely solidification of the metal that it leads to adhesion between the ingot mold and the cuff, thus causing the parts present to be torn off when the sliding movement is carried out.
  • This means consists, according to the invention, in applying to the liquid metal in the course of solidification a periodic electromagnetic field of variable intensity and direction substantially parallel to the axis of the ingot mold and in adapting its intensity as a function of the desired level.
  • the advantage of such a method is therefore to allow the metal-ingot contact height and consequently the thickness of the cortical layer to be reduced at will simply with a coil supplied by a current of industrial frequency 50 or 60 Hz knowing that any electrical failure will only have the effect of varying the height of metal in the mold, that is to say that any risk of leakage of liquid metal will be eliminated which is not the case in electromagnetic casting .
  • the presence of an ingot mold while limiting the possibility of oxidation of the liquid metal at the meniscus, prevents, by the contact it has with the metal, any displacement of the oxide film towards the side wall. and therefore any risk of tingling on the surface of the semi-finished product.
  • the field applied to the metal also has the effect of creating forces inside the liquid which homogenize the cooling and tend to cause a refinement of the pouring grain.
  • the coil which creates the magnetic field preferably has a shape symmetrical to that of the mold, so that it creates a direction field substantially parallel to the axis of the mold. It is arranged along this axis so that the zone where the field exerts a maximum action is located at a level of the mold between half and a third of its height from the base.
  • Such a method makes it possible, during a casting operation, to carry out a normal start-up under the best possible conditions, that is to say with a high height of metal in the ingot mold. For that, one decreases the intensity of the field until possibly canceling it so as to remove any modification of the normal level of the metal. Subsequently, to switch to cruising mode, the intensity of the field is increased until reaching a minimum height leading to a minimum thickness of the cortical layer. The maximum value of the admissible field is easily detected by the appearance, when it is exceeded, of deformation of the surface of the cast product.
  • This value generally corresponds to the moment when the level reached by the contact line corresponds to the level at which the line of intersection between the solidification front due to indirect cooling and the solidification front due to direct cooling in conventional casting takes place.
  • the contact height is then practically reduced to a circular line and the cortical layer nonexistent.
  • the method according to the invention makes it possible to modify the intensity of the field to adapt it to variations in speed and to determine as previously the maximum value of the admissible intensity for each of these speeds.
  • an aluminum alloy of the type 2214 was poured according to the standards of the Aluminum Association, at the speed of 60 mm / minute. The float adjusted the metal level halfway up the ingot mold and the coolant came into contact with the skin of the cast billet approximately 1 cm below the base of the ingot mold.
  • the application of the method according to the invention leads to a progressive reduction in the thickness of the cortical layer as the electric voltage at the terminals of the coil is increased in proportions such that this thickness becomes zero for a voltage of 180 volts.
  • the grain size decreases so that, from a metal which has grains of 500 ⁇ m in conventional casting, grains of 180 ⁇ m on average are obtained according to the invention.
  • the present invention finds its application in the casting of metallurgical semi-products, in particular aluminum and its alloys such as, for example, lithium alloys and in which it is desired to obtain both a cortical zone of practically zero thickness, a grain end without prior addition of refining agents such as ATSB and the absence of pins.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Continuous Casting (AREA)
  • Valve Housings (AREA)
  • Glass Compositions (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Pinball Game Machines (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Electronic Switches (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Finishing Walls (AREA)
  • Mold Materials And Core Materials (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
  • Contacts (AREA)
  • Conductive Materials (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP85904639A 1984-09-19 1985-09-18 Procede de reglage du niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale continue Expired EP0195793B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85904639T ATE30218T1 (de) 1984-09-19 1985-09-18 Verfahren zum einstellen der beruehrungslinie der freien metalloberflaeche mit der giessform beim senkrechtstranggiessen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8414740A FR2570304B1 (fr) 1984-09-19 1984-09-19 Procede de reglage du niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale
FR8414740 1984-09-19

Publications (2)

Publication Number Publication Date
EP0195793A1 EP0195793A1 (fr) 1986-10-01
EP0195793B1 true EP0195793B1 (fr) 1987-10-14

Family

ID=9308070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85904639A Expired EP0195793B1 (fr) 1984-09-19 1985-09-18 Procede de reglage du niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale continue

Country Status (25)

Country Link
US (1) US4807694A (fi)
EP (1) EP0195793B1 (fi)
JP (1) JPS61502108A (fi)
KR (1) KR900002038B1 (fi)
AT (1) ATE30218T1 (fi)
AU (1) AU572700B2 (fi)
BR (1) BR8506926A (fi)
CA (1) CA1256669A (fi)
DD (1) DD239546A5 (fi)
DE (1) DE3560766D1 (fi)
DK (1) DK227986A (fi)
ES (1) ES8608963A1 (fi)
FI (1) FI862091A (fi)
FR (1) FR2570304B1 (fi)
GB (1) GB2164280B (fi)
GR (1) GR852251B (fi)
IL (1) IL76406A0 (fi)
IS (1) IS1336B6 (fi)
NO (1) NO165581C (fi)
NZ (1) NZ213486A (fi)
PT (1) PT81155B (fi)
SG (1) SG2388G (fi)
SU (1) SU1473700A3 (fi)
UA (1) UA5582A1 (fi)
WO (1) WO1986001756A1 (fi)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609656B1 (fr) * 1987-01-15 1989-03-24 Cegedur Procede de reglage au niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale de produits de section quelconque
US4796687A (en) * 1987-07-10 1989-01-10 Olin Corporation Liquid/solid interface monitoring during direct chill casting
FR2664618B1 (fr) * 1990-07-10 1993-10-08 Pechiney Aluminium Procede de fabrication de cathodes pour pulverisation cathodique a base d'aluminium de tres haute purete.
FR2664513A1 (fr) * 1990-07-16 1992-01-17 Siderurgie Fse Inst Rech Procede et dispositif de controle de l'epaisseur en coulee continue de bande mince de materiau electroconducteur.
US6577118B2 (en) * 2001-02-02 2003-06-10 B.D.H. Industries Inc. System and method for measuring liquid metal levels or the like
US6604570B1 (en) 2002-05-10 2003-08-12 Fiber Tech Co., Ltd. Apparatus and method for manufacturing metal filaments
US20090062457A1 (en) * 2007-09-04 2009-03-05 Kraton Polymers U.S. Llc Styrenic block copolymers and compositions containing the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232824A (en) * 1975-09-09 1977-03-12 Nippon Steel Corp Method of casting metal melts
NO790471L (no) * 1978-02-18 1979-08-21 British Aluminium Co Ltd Stoepemetaller.
GB2034216B (en) * 1978-11-02 1982-09-22 Olin Corp Mouldless casting
DE3009189B1 (de) * 1980-03-11 1981-08-20 Mannesmann Demag Ag, 4100 Duisburg Verfahren zum Horizontalstranggiessen von fluessigen Metallen,insbesondere von Stahl,und Einrichtung dazu
FR2509207A1 (fr) * 1981-07-09 1983-01-14 Pechiney Aluminium Procede de coulee continue verticale a grande vitesse de l'aluminium et de ses alliages
FR2530511B1 (fr) * 1982-07-23 1985-07-05 Cegedur Procede de coulee de metaux dans lequel on fait agir des champs magnetiques
FR2530510B1 (fr) * 1982-07-23 1985-07-05 Cegedur Procede de coulee electromagnetique de metaux dans lequel on fait agir au moins un champ magnetique different du champ de confinement
JP3107445B2 (ja) * 1992-02-24 2000-11-06 富士通株式会社 画像記録装置

Also Published As

Publication number Publication date
JPS6339337B2 (fi) 1988-08-04
UA5582A1 (uk) 1994-12-28
NO861808L (no) 1986-05-06
FR2570304A1 (fr) 1986-03-21
PT81155A (fr) 1985-10-01
NZ213486A (en) 1988-04-29
FI862091A0 (fi) 1986-05-19
GR852251B (fi) 1985-12-12
KR900002038B1 (ko) 1990-03-31
AU572700B2 (en) 1988-05-12
IS1336B6 (is) 1989-01-13
JPS61502108A (ja) 1986-09-25
DE3560766D1 (en) 1987-11-19
SU1473700A3 (ru) 1989-04-15
ES8608963A1 (es) 1986-07-16
AU4860485A (en) 1986-04-08
PT81155B (pt) 1992-05-29
GB8522940D0 (en) 1985-10-23
EP0195793A1 (fr) 1986-10-01
GB2164280A (en) 1986-03-19
ATE30218T1 (de) 1987-10-15
FR2570304B1 (fr) 1986-11-14
WO1986001756A1 (fr) 1986-03-27
NO165581B (no) 1990-11-26
KR860002326A (ko) 1986-04-24
SG2388G (en) 1988-06-17
US4807694A (en) 1989-02-28
GB2164280B (en) 1987-09-23
NO165581C (no) 1991-03-06
CA1256669A (fr) 1989-07-04
IS3042A7 (is) 1986-03-20
DK227986D0 (da) 1986-05-16
DD239546A5 (de) 1986-10-01
BR8506926A (pt) 1986-12-23
ES547082A0 (es) 1986-07-16
IL76406A0 (en) 1986-01-31
DK227986A (da) 1986-05-16
FI862091A (fi) 1986-05-19

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