EP0103220B1 - Chenal de coulée chauffé par induction - Google Patents

Chenal de coulée chauffé par induction Download PDF

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Publication number
EP0103220B1
EP0103220B1 EP83108361A EP83108361A EP0103220B1 EP 0103220 B1 EP0103220 B1 EP 0103220B1 EP 83108361 A EP83108361 A EP 83108361A EP 83108361 A EP83108361 A EP 83108361A EP 0103220 B1 EP0103220 B1 EP 0103220B1
Authority
EP
European Patent Office
Prior art keywords
channel
sleeve
runner
graphite susceptor
casting
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
EP83108361A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0103220A1 (fr
Inventor
Joel Pamart
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.)
Pont a Mousson SA
Original Assignee
Pont a Mousson 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 Pont a Mousson SA filed Critical Pont a Mousson SA
Priority to AT83108361T priority Critical patent/ATE19213T1/de
Publication of EP0103220A1 publication Critical patent/EP0103220A1/fr
Application granted granted Critical
Publication of EP0103220B1 publication Critical patent/EP0103220B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/06—Heating or cooling equipment

Definitions

  • the present invention relates to the channel or the pouring chute of a metal alloy with a high casting temperature, at least equal to 1400 ° C., in a mold.
  • a metal alloy can be a super-alloy or an alloyed or low-alloyed steel.
  • Superalloys fall into three categories: austenitic steels and alloys containing more than 20% iron, i.e. essentially composed of an austenite of iron, nickel, chromium or iron, chromium, nickel, cobalt, and alloys containing less than 20% iron, either nickel-based or cobalt-based.
  • Superalloys still contain elements capable of forming carbides or inter-metallic phases: molybdenum, tungsten, vanadium, niobium, titanium, aluminum. Their main interest is their mechanical and chemical resistance, for increasingly higher temperatures, that is to say above 900 or 1000 ° C. Their creep resistance is appreciated.
  • the pouring channel of such an alloy can be that of a melting furnace or can be connected to a casting ladle in a foundry.
  • a metal alloy with a high casting temperature solidifies quickly when the temperature drops.
  • a rotary or tilting furnace is used as a melting appliance in order to tilt and empty the chute between two successive flows by bringing the liquid metal down and into the heated enclosure of the oven.
  • an inductor in the form of a coil or solenoid embedded in the refractory lining of the pouring spout, over its entire length, in order to induce a secondary heating current in the liquid alloy when it fills the chute just before and during a casting, and thus reduce the risks of solidification of the liquid metal alloy on the path of the casting chute.
  • a chute provided with a flooded inductor is no longer heating in the absence of an alloy or of a liquid metal, between two successive flows, when the chute is raised to bring the liquid metal alloy down to the furnace. It follows that, when resumption of casting, the risk of beginning of solidification remains when the metal alloy enters the insufficiently heated casting chute.
  • Induction heating means are thus known from patent AU-B-502 023 with a straight part and a bent part raised upwards to apply to the pouring orifice of a mold. being provided throughout this runner.
  • the problem is therefore posed of eliminating the risk of cooling and solidification of a metal alloy at a casting temperature at least equal to 1400 ° C. in a pouring channel, between two successive castings of a mold, by heating the channel even when it does not contain any alloy or liquid metal.
  • induction heating is preferred to heating by electrical resistances, the inductor suitably cooled causing no problems of expansion when it is embedded in the refractory lining, and the supply of current to the inductor, therefore to the channel, despite the high power required, also not posing any problems due to the interposition between the channel and the source of electric current of an aperiodic generator receiving this electric current at high power.
  • the subject of the invention is therefore an improved casting channel with a view to solving this problem.
  • the characteristics for the solution of the indicated problem are contained in claim 1.
  • the pouring channel is heated by induction when the inductor is traversed by a primary electric current, even when the liquid metal alloy is not introduced into the channel, so that the channel can be heated in advance, even before the first casting, and of course between two successive flows at a temperature ensuring the fluidity of the metal alloy at high casting temperature when it is introduced into the channel.
  • the invention is applied to an electric melting furnace 1, of known type, rotating or tilting by means of a cradle 2 in an arc of a circle carried by rollers 3 (only one is shown), themselves mounted on a base frame 4.
  • the oven 1 is of the reverberatory type with a vault 6 which reverberates the heat.
  • tear-off is shown part of the refractory lining 7 of the furnace 1 and of the capacity of the enclosure 8.
  • tear-off is represented a part of the refractory lining 7 of the furnace 1 and of the capacity 8 which opens towards the pouring orifice of liquid metal by a conduit 9.
  • the conduit 9 is itself connected to an external pouring chute 10 with a metal box, fixed at one of its ends by a flange 11 removably to the furnace 1 proper and supported at the other end by a vertical stand A possibly adjustable in height by means not shown, for example of the screw-nut and handwheel type.
  • the chute 10 comprises, as is known, a refractory lining 12, for example made of silico-aluminous rammed earth, providing a duct or cylindrical pouring channel 13, of closed cross section connected to the duct 9.
  • the channel 13, of axis XX produced as described below, comprises a straight part whose general direction is tiltable on either side of the horizontal during the tilting of the furnace 1 and a bent part 14 rising towards the high and opening onto the upper face of the chute 10 by a pouring orifice 15.
  • a mold B represented by its outline exterior in phantom. The mold B is applied to the pouring orifice 15 by a pressure from the plate P actuated for example by a jack not shown.
  • the capacity 8 of the furnace is placed under pressure of an inert gas such as argon or nitrogen so as to ensure the displacement of the liquid metal alloy up to the pouring orifice by adjusting the pressure without risk of oxidizing the liquid metal alloy in contact with this gas.
  • an inert gas such as argon or nitrogen
  • the chute 10 (or the channel 13) is of the heating type.
  • the turns of the inductor 17 are internally cooled by a stream of water not shown, which eliminates any problem of expansion therefore of embedding of the inductor inside the refractory lining 12.
  • the ends of the turns of the inductor 17 are connected to the two terminals 18 of an aperiodic generator 19 of electric current.
  • an aperiodic generator 19 of electric current Conventionally, induction heating of the liquid metal alloy is obtained when this alloy completely fills the channel 13 and the coil 17 is supplied with electric current: the primary is the coil 17 and the secondary is the liquid metal alloy .
  • a graphite sleeve 20 coaxial with the channel 13 therefore of axis XX, this sleeve 20, said susceptor in fact constituting the secondary in the induction system of which the coil 17 is the primary.
  • the susceptor sleeve 20 is embedded or inserted, being placed with wide dimensional tolerances, on the refractory lining 12, in the vicinity of the internal wall forming the flow bed of the liquid metal alloy, but not constituting the bed d 'flow.
  • the channel 13 is finished in the form described below.
  • a sleeve 16 bent continuous and smooth, made of refractory material is applied as an inner coating of the susceptor sleeve 20, the interstices of which it covers between segments 23 opposite the contact of the sleeve 20 with the refractory lining 12.
  • the sleeve 16 therefore constitutes the precise finish of the channel 13 even if the lining 12 itself has an internal cavity produced with wide dimensional tolerances. In other words, the sleeve 16 constitutes the flow bed of the liquid metal alloy with which it is intended to be in direct contact.
  • the furnace 1 is preferably tilted or inclined so that the pouring chute 10 has its straight part in the raised position or inclined upwards in order to prevent liquid metal from entering the channel. 13.
  • the oven is therefore tilted to the maximum (Fig. 4) and the chute 10 no longer rests on the stand A.
  • the electric current supplied by the generator 19 passes through the primary coil 17 which induces the secondary heating current in the graphite susceptor tube 20. The latter in turn heats the coating sleeve 16 by contact.
  • the furnace 1 When the melting of the metallic charge of the furnace 1 is finished, the furnace 1 is tilted in the position of FIG. 1, for casting until the chute 10 is supported on the stand A.
  • the liquid metal rushes into the preheated casting channel 13, without rising to the orifice 15 on which the mold B since the neutral gas pressure above the charge of liquid metal in the furnace 1 is kept at a low value precisely adjusted so that the level of the liquid metal is lower than that of the orifice 15.
  • the metal or liquid alloy contained in the flow channel 13 or traversing it remains heated in all circumstances to a temperature almost as high as that which prevails inside the furnace 1.
  • the invention is also applicable to induction heating, in the absence of liquid metal, of a channel oven channel or an insulated channel fed by a simple ladle, neither heated nor heated.

Landscapes

  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Induction Heating (AREA)
  • Furnace Details (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Organic Insulating Materials (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
EP83108361A 1982-09-13 1983-08-25 Chenal de coulée chauffé par induction Expired EP0103220B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108361T ATE19213T1 (de) 1982-09-13 1983-08-25 Induktiv beheizter giesskanal.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8215556A FR2532866B1 (fr) 1982-09-13 1982-09-13 Chenal de coulee chauffe par induction
FR8215556 1982-09-13

Publications (2)

Publication Number Publication Date
EP0103220A1 EP0103220A1 (fr) 1984-03-21
EP0103220B1 true EP0103220B1 (fr) 1986-04-16

Family

ID=9277460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108361A Expired EP0103220B1 (fr) 1982-09-13 1983-08-25 Chenal de coulée chauffé par induction

Country Status (13)

Country Link
US (1) US4475721A (es)
EP (1) EP0103220B1 (es)
JP (1) JPS5970460A (es)
AT (1) ATE19213T1 (es)
DE (1) DE3363074D1 (es)
DK (1) DK162326C (es)
ES (1) ES8404217A1 (es)
FI (1) FI73154C (es)
FR (1) FR2532866B1 (es)
IT (2) IT1168830B (es)
NO (1) NO160058C (es)
SU (1) SU1373331A3 (es)
UA (1) UA6008A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19829191A1 (de) * 1998-06-30 2000-01-05 Be Automation Giesereitechnik Druckvergiesseinrichtung

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795139A (en) * 1987-07-13 1989-01-03 Intersteel Technology, Inc. Apparatus for tapping slag-free steel from a continuous melting furnace
DE3842690C2 (de) * 1988-12-19 1998-04-30 Didier Werke Ag Feuerfeste Verbindung sowie Induktionsspule hierfür
US5022150A (en) * 1989-10-27 1991-06-11 General Electric Company Method for producing heat transfer tube with insitu heater
JP2827126B2 (ja) * 1989-11-25 1998-11-18 住友重機械工業株式会社 溶湯・溶滓の連続排出方法及びその装置
US5202081A (en) * 1990-04-17 1993-04-13 Rolls-Royce Plc Launder system for supplying molten metal and a launder nozzle
FR2666036A1 (fr) * 1990-08-27 1992-02-28 Pont A Mousson Dispositif intermediaire pour la coulee de pieces moulees.
FR2670697B1 (fr) * 1990-12-24 1993-03-12 Pont A Mousson Chenal pour la mise en óoeuvre d'un procede de coulee sous pression d'un alliage metallique.
DE4108153A1 (de) * 1991-03-14 1992-09-17 Didier Werke Ag Feuerfestes formteil und dessen verwendung
US5339329A (en) * 1993-01-25 1994-08-16 Armco Steel Company, L.P. Induction heated meniscus coating vessel
FR2701225B1 (fr) * 1993-02-08 1995-04-21 Seva Procédé de fabrication d'un organe chauffant de transfert de métal liquide, organe chauffant, son application et son utilisation.
FR2720591B1 (fr) * 1994-02-14 1996-08-09 Seva Moyen et bâti pour le préchauffage d'un conduit de coulée de métal.
FR2727883B1 (fr) * 1994-12-09 1997-01-17 Seva Conduit de coulee de metal liquide, procede et dispositif pour l'homogeneisation du metal
US5495495A (en) * 1995-05-25 1996-02-27 Saint-Gobain/Norton Industrial Ceramics Corporation Dense lining for coreless induction furnace
DE10059744A1 (de) * 2000-12-01 2002-06-06 Km Europa Metal Ag Verfahren zum gezielten Temperieren einer Gießrinne und Gießrinne zur Durchführung des Verfahrens
US6555801B1 (en) 2002-01-23 2003-04-29 Melrose, Inc. Induction heating coil, device and method of use
CA2510506A1 (en) * 2002-12-16 2004-07-15 Irving I. Dardik Systems and methods of electromagnetic influence on electroconducting continuum
CA2619756A1 (en) * 2005-08-19 2007-03-01 Advanced Metals Technology Company, Llc Induction powered ladle bottom nozzle
US8831545B2 (en) * 2008-04-04 2014-09-09 Qualcomm Incorporated Methods and apparatus for aggregation of guide and frequency map information for multiple frequency networks using upper-level single frequency network
GB2459509B (en) 2008-04-25 2011-05-11 Goodwin Plc An apparatus for casting and a method of casting
EP4064790B1 (en) * 2021-03-22 2023-08-16 Karlsruher Institut für Technologie Heating system, use of a heating system, turbine, and method for heating

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068432B (es) * 1959-11-05
US2882570A (en) * 1956-05-22 1959-04-21 Joseph B Brennan Continuous vacuum casting
US3435992A (en) * 1966-03-11 1969-04-01 Tisdale Co Inc Pouring nozzle for continuous casting liquid metal or ordinary steel
US3604598A (en) * 1969-07-09 1971-09-14 United States Steel Corp Outlet passage construction for teeming vessels
US3623541A (en) * 1969-10-29 1971-11-30 William L Schmitz Metal casting apparatus
JPS4921331A (es) * 1972-06-17 1974-02-25
JPS5252832A (en) * 1975-10-27 1977-04-28 Mitsubishi Heavy Ind Ltd Holding device for molten metal in ladle
CA1101164A (en) * 1977-04-30 1981-05-19 Sumitomo Electric Industries, Ltd. Method and apparatus for producing fibers for optical transmission
AU502023B1 (en) * 1977-11-08 1979-07-12 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Low pressure casting
US4174462A (en) * 1978-03-30 1979-11-13 Pearce Michael L Induction furnaces for high temperature continuous melting applications
DE3025680A1 (de) * 1980-07-07 1982-02-04 Siemens AG, 1000 Berlin und 8000 München Heizkoerper fuer einen hochtemperaturofen
GB2082879A (en) * 1980-08-20 1982-03-10 Plessey Co Ltd Improvements in or relating to furnaces for producing semiconductor materials
JPS5775277A (en) * 1980-10-30 1982-05-11 Toshiba Mach Co Ltd Casting equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19829191A1 (de) * 1998-06-30 2000-01-05 Be Automation Giesereitechnik Druckvergiesseinrichtung

Also Published As

Publication number Publication date
US4475721A (en) 1984-10-09
IT8353700V0 (it) 1983-09-09
SU1373331A3 (ru) 1988-02-07
FR2532866B1 (fr) 1985-06-07
DK405483A (da) 1984-03-14
DK162326B (da) 1991-10-14
DK405483D0 (da) 1983-09-06
FR2532866A1 (fr) 1984-03-16
ES525437A0 (es) 1984-05-16
ES8404217A1 (es) 1984-05-16
IT1168830B (it) 1987-05-20
DK162326C (da) 1992-03-09
ATE19213T1 (de) 1986-05-15
IT8367935A0 (it) 1983-09-09
NO160058B (no) 1988-11-28
EP0103220A1 (fr) 1984-03-21
UA6008A1 (uk) 1994-12-29
DE3363074D1 (en) 1986-05-22
FI73154B (fi) 1987-05-29
FI833232A (fi) 1984-03-14
FI833232A0 (fi) 1983-09-09
FI73154C (fi) 1987-09-10
JPH0380578B2 (es) 1991-12-25
NO160058C (no) 1989-03-08
NO833203L (no) 1984-03-14
JPS5970460A (ja) 1984-04-20

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