EP0822733A1 - Dispositif de chauffage par induction et installation de traitement thermique en continu comportant un tel dispositif - Google Patents
Dispositif de chauffage par induction et installation de traitement thermique en continu comportant un tel dispositif Download PDFInfo
- Publication number
- EP0822733A1 EP0822733A1 EP97401866A EP97401866A EP0822733A1 EP 0822733 A1 EP0822733 A1 EP 0822733A1 EP 97401866 A EP97401866 A EP 97401866A EP 97401866 A EP97401866 A EP 97401866A EP 0822733 A1 EP0822733 A1 EP 0822733A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- induction
- product
- heating device
- enclosure
- accordance
- 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.)
- Granted
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
Definitions
- the present invention relates to a device for induction heating of a moving metal product continuously under a protective atmosphere.
- It also relates to an installation of continuous heat treatment of a moving product comprising such a device.
- This invention is particularly applicable heat treatment under a protective atmosphere such as than realized in hot coating lines for galvanizing, aluminizing, etc ... and the lines of continuous heat treatments such as continuous annealing for steel sheets or patent lines for a steel wire.
- space heaters induction to heat metallic materials scrolling has been known for a long time.
- a heating device by induction comprising a turn traversed by current, arranged in a plane parallel to the surface of the scrolling product so that the magnetic flux, transverse, is perpendicular to the surface of the product.
- induction heating must be done under protective atmosphere, such as a mixture of nitrogen and of hydrogen, and the enclosure of the heater induction must be completely airtight so avoid any oxidation of the product.
- the moving product to be treated must necessarily be cut in the absence of having provided an opening in the means of induction surrounding this moving product.
- Conductive parts of the enclosure may thus be the seat of electric current induced by the induction flow returning to the induction means.
- the object of the present invention is to remedy the disadvantages mentioned above and to propose a device for induction heating of a moving metal product in a protective atmosphere, guaranteeing at best the air and gas tightness around this product scrolling, allowing easier intervention on means of induction and limiting any overheating of the device.
- the present invention relates to a device for induction heating of a moving metal product continuously under a protective atmosphere, including induction means, a sealing enclosure, insulating thermally and electrically and gas tight, arranged around the moving product, between this product and the means of induction, the means of induction comprising at least one turn of conductive material connected to a high frequency current generator and extending around the product moving in a plane perpendicular to the direction of travel of the product, the sealing enclosure being arranged inside or turns of the induction means.
- This device is characterized in that the sealing enclosure extends in the direction of scrolling, upstream and downstream of the induction means, enough distance to create an area flow through the return induction flow.
- This sealing enclosure creates a zone in which the induction flow returns to induction means without heating any metallic part.
- the seal is not more performed around the means of induction but simply between these means of induction and the products scrolling.
- a continuous heat treatment plant of a moving product such as steel tape or wire, under protective atmosphere, includes several successive heat treatment.
- this installation comprises an induction heating section comprising a heating device according to the invention, a transfer tunnel in which the moving product performs a single pass connecting the induction heating to said treatment chambers.
- the induction heater warms up the steel strip or wire in a section of oven in which this strip or wire makes only one pass through the tunnel transfer, so as to have access to the entire periphery of the air induction heater ambient.
- the induction heater will be described below in a processing application continuous thermal of a moving product, such as a strip 1, under a protective atmosphere.
- This type of heat treatment can also apply to a moving steel wire.
- the protective atmosphere is generally composed of a mixture of nitrogen and hydrogen and allows avoid any oxidation of the product during treatment.
- an installation can successively include a heating chamber of strip 1 at a temperature of 600 to 900 ° C, a temperature maintenance chamber, a slow cooling, a cooling chamber fast, an induction reheating section, a intermediate temperature holding chamber, and finally a final cooling chamber.
- strip 1 comes out, on the left of the figure, of a rapid cooling chamber, passes through a transfer tunnel 3 and a section of induction heating before being introduced into a intermediate temperature holding chamber 2.
- the different heat treatment chambers are surrounded by sealing means allowing keep inside each of these rooms a protective atmosphere of reducing gas composed of a nitrogen / hydrogen mixture with low dew point and very low residual oxygen content.
- the strip 1 traverses these treatment chambers 2 in one or more vertical paths separated by deflection rollers.
- the induction heating includes induction means 4 and a sealing enclosure 7, non-metallic and gas-tight, which is arranged around the moving product 1, between this product 1 and the induction means 4.
- the sealing enclosure 7 is thermally and electrically insulating, allowing thus surrounding the moving product with a non-conductive enclosure.
- the induction means 4 comprise at least one turn of conductive material connected to a generator 45 of high frequency current and extending around the moving product 1, in a plane perpendicular to the scroll direction F of this product.
- the sealing enclosure is thus arranged at inside the coil of the induction means 4.
- the sealing enclosure 7 extends parallel to the direction of travel F, upstream and downstream of induction means 4, over a distance sufficient to create an area crossed by the induction flow of return.
- This distance is at least 200 mm, and preferably 300 mm.
- the sealing enclosure being non-conductive, it is not the seat of any current induced by the flow return induction.
- This induction heating device being intended to be placed upstream or between chambers of treatment of the product moving under an atmosphere protective, the sealing enclosure 7 is connected sealingly to these processing chambers.
- the sealing enclosure 7 is constituted in this example of a flexible sleeve 7 comprising one or several layers 7a of thermally insulating fabric and electrically coated on the outside with a film 7b of gas-tight and temperature-resistant material at least 100 ° C.
- the flexible sleeve 7 consists of seven layers 7a of glass fiber fabric covered on the outside with a waterproof film 7b formed of 'a piece of polytetrafluoroethylene.
- the insulating fabric 7a of the sleeve could also consist of ceramic fibers.
- the flexible sleeve 7 is thus kept in tension between the fixing flanges 8 at each end and is pressed against the interior walls of the induction means 4 by the pressure prevailing inside the oven. This pressure is of the order of 1 to 2. 10 2 Pa.
- the sealing enclosure 7 may further comprise a muffle 11 of refractory material which is not gas-tight, externally lined with the sleeve.
- the or the inductors 4 consist of a single turn of rectangular section surrounding the moving product 1 and comprising three metal sheets 42, 43, 44, on which are welded water coils 41 for cooling the induction means 4.
- the metal sheets 42, 43, 44 are assembled removably to each other and, possibly to the current generator 45.
- inductor 4 includes five copper sheets: two sheets 43 connected to the generator current 45, two sheets 42 extending face to face and forming the sides of the turn parallel to the strip scrolling 1, and a sheet 44 closing the opposite side of the turns on the current generator 45. These sheets are closely related to each other, to ensure a perfect electrical contact, by fixing means removable 46, such as bolts 46.
- This structure of the inductors 4 allows in particular by dismantling the plate attachments, to intervene on the inductors 4 without cutting the strip 1 and break the sealing enclosure 7.
- the entire space comprising the induction means 4 and the enclosure 7 is surrounded by a body of protection 9 not waterproof and avoiding any circuit continuous electric around the inductor.
- stabilizer rollers 10 are capable of inflicting a slight deflection at band 1, so as to reduce, if necessary, the camber of band 1 and position it at the center of the induction means 4.
- All the sheets 42, 43, 44 and serpentines 41 is generally made of copper.
- a transfer tunnel 3 in which the product scrolling 1 makes a single pass, connects the induction heater to the chamber rapid cooling (not shown) and in the chamber of intermediate temperature 2.
- the induction heating is installed in a section of the oven in which the strip performs only one pass so as to have access to its entire circumference in the air ambient.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Induction Heating (AREA)
- Furnace Details (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
- la figure 1 est une vue schématique illustrant une partie d'une installation de traitement thermique comprenant une section de chauffage par induction suivie d'une chambre de maintien à température intermédiaire;
- la figure 2 est une vue schématique d'un dispositif de chauffage par induction conforme à l'invention;
- la figure 3 est une vue en élévation d'un dispositif de chauffage par induction conforme à l'invention; et
- la figure 3A est une vue agrandie du détail A de la figure 3.
Claims (12)
- Dispositif de chauffage par induction d'un produit métallique (1) défilant en continu sous atmosphère protectrice, comprenant des moyens d'induction (4), et une enceinte d'étanchéité (3), isolante thermiquement et électriquement et étanche aux gaz, disposée autour du produit défilant (1), entre ledit produit (1) et les moyens d'induction (4), les moyens d'induction (4) comprenant au moins une spire en matériau conducteur connectée à un générateur (45) de courant haute fréquence et s'étendant autour du produit défilant (1) dans un plan perpendiculaire à une direction de défilement (F) dudit produit (1), ladite enceinte d'étanchéité (7) étant disposée à l'intérieur de la ou des spires des moyens d'induction (4), caractérisé en ce que l'enceinte d'étanchéité (7) s'étend dans la direction de défilement (F), en amont et en aval des moyens d'induction (4), sur une distance suffisante pour créer une zone traversée par le flux d'induction de retour.
- Dispositif de chauffage conforme à la revendication 1, caractérisé en ce que ladite distance est au moins égale à 200 mm, de préférence à 300 mm.
- Dispositif de chauffage conforme à l'une des revendications 1 à 2, disposé entre ou en amont de chambres de traitement (2) du produit défilant (1) sous atmosphère protectrice, caractérisé en ce que l'enceinte d'étanchéité (7) est raccordée de manière étanche auxdites chambres de traitement (2).
- Dispositif de chauffage conforme à l'une des revendications 1 à 3, caractérisé en ce que l'enceinte d'étanchéité (7) est constituée d'un manchon souple (7) comprenant une ou plusieurs couches de tissu (7a) isolant thermiquement et électriquement, revêtu extérieurement d'un film (7b) de matière étanche aux gaz et résistant à une température d'au moins 100°C.
- Dispositif de chauffage conforme à la revendication 4, caractérisé en ce que le tissu isolant (7a) du manchon (7) est un tissu de fibres de verre ou de fibres de céramiques.
- Dispositif de chauffage conforme à l'une des revendications 4 ou 5, caractérisé en ce que ledit film (7b) est composé de polytétrafluoroéthylène.
- Dispositif de chauffage conforme à l'une des revendications 4 à 6, caractérisé en ce que l'enceinte d'étanchéité comprend en outre un moufle (11) en matière réfractaire doublé extérieurement du manchon (7).
- Dispositif de chauffage conforme à l'une des revendications 1 à 3, caractérisé en ce que l'enceinte d'étanchéité (7) est une gaine en céramique étanche.
- Dispositif de chauffage conforme à l'une des revendications 1 à 8, caractérisé en ce que les moyens d'induction (4) comprennent au moins un inducteur constitué d'une spire unique de section rectangulaire entourant le produit défilant (1) et comprenant au moins trois tôles métalliques (42, 43, 44) assemblées de manière démontable les unes aux autres et à un générateur de courant (45).
- Installation de traitement thermique en continu d'un produit défilant (1), tel qu'une bande ou fil d'acier, sous atmosphère protectrice, comprenant plusieurs chambres (2) de traitement thermique successives, caractérisée en ce qu'elle comprend une section de chauffage par induction comprenant un dispositif de chauffage conforme à l'une des revendications 1 à 9, un tunnel de transfert dans lequel le produit défilant effectue un unique passage reliant le dispositif de chauffage par induction auxdites chambres de traitement (2).
- Installation de traitement thermique conforme à la revendication 10, caractérisée en ce que la totalité de l'espace comprenant les moyens d'induction (4) et l'enceinte d'étanchéité (9) est entourée d'une carrosserie de protection (9) non étanche et évitant tout circuit électrique continu autour des moyens d'induction (4).
- Installation de traitement thermique conforme à l'une des revendications 10 ou 11, caractérisée en ce que des rouleaux stabilisateurs (10) sont disposés de part et d'autre de la section de chauffage à induction et sont adaptés à infliger une légère déflexion à la bande (1), de manière à réduire la cambrure de la bande (1) et à positionner ladite bande (1) au centre des moyens d'induction (4).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9609823A FR2752134B1 (fr) | 1996-08-02 | 1996-08-02 | Dispositif de chauffage par induction et installation de traitement thermique en continu comportant un tel dispositif |
FR9609823 | 1996-08-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0822733A1 true EP0822733A1 (fr) | 1998-02-04 |
EP0822733B1 EP0822733B1 (fr) | 2003-10-29 |
Family
ID=9494793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97401866A Expired - Lifetime EP0822733B1 (fr) | 1996-08-02 | 1997-08-01 | Dispositif de chauffage par induction et installation de traitement thermique en continu comportant un tel dispositif |
Country Status (6)
Country | Link |
---|---|
US (1) | US5895599A (fr) |
EP (1) | EP0822733B1 (fr) |
JP (1) | JP4011158B2 (fr) |
AT (1) | ATE253289T1 (fr) |
DE (2) | DE69725792T2 (fr) |
FR (1) | FR2752134B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000052965A2 (fr) * | 1999-03-01 | 2000-09-08 | Avestapolarit Aktiebolag (Publ) | Procede permettant de chauffer une bande metallique et appareil correspondant |
US6693264B2 (en) | 2001-03-06 | 2004-02-17 | Celes | Vacuum and gas tight enclosure for induction heating system |
EP2216418A1 (fr) * | 2007-09-27 | 2010-08-11 | Nippon Steel Corporation | Structure d'isolation d'une bobine de chauffage par induction |
Families Citing this family (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6570141B2 (en) | 2001-03-26 | 2003-05-27 | Nicholas V. Ross | Transverse flux induction heating of conductive strip |
FR2846261B1 (fr) * | 2002-10-25 | 2005-01-21 | Myriad | Procede de sechage d'un revetement de bande metallique |
US7323666B2 (en) | 2003-12-08 | 2008-01-29 | Saint-Gobain Performance Plastics Corporation | Inductively heatable components |
WO2007081918A2 (fr) * | 2006-01-09 | 2007-07-19 | Inductotherm Corp. | Appareil de chauffage par induction à blindage électromagnétique |
US8671658B2 (en) | 2007-10-23 | 2014-03-18 | Ener-Core Power, Inc. | Oxidizing fuel |
US8393160B2 (en) | 2007-10-23 | 2013-03-12 | Flex Power Generation, Inc. | Managing leaks in a gas turbine system |
DE102008015658A1 (de) * | 2008-03-25 | 2009-11-12 | Gesellschaft für aero- und thermodynamische Verfahrenstechnik mbH | Vorrichtung und Verfahren zur Erwärmung von Metallbändern |
US8701413B2 (en) * | 2008-12-08 | 2014-04-22 | Ener-Core Power, Inc. | Oxidizing fuel in multiple operating modes |
US8621869B2 (en) | 2009-05-01 | 2014-01-07 | Ener-Core Power, Inc. | Heating a reaction chamber |
US20100275611A1 (en) * | 2009-05-01 | 2010-11-04 | Edan Prabhu | Distributing Fuel Flow in a Reaction Chamber |
US8893468B2 (en) | 2010-03-15 | 2014-11-25 | Ener-Core Power, Inc. | Processing fuel and water |
US9057028B2 (en) | 2011-05-25 | 2015-06-16 | Ener-Core Power, Inc. | Gasifier power plant and management of wastes |
US9273606B2 (en) | 2011-11-04 | 2016-03-01 | Ener-Core Power, Inc. | Controls for multi-combustor turbine |
US9279364B2 (en) | 2011-11-04 | 2016-03-08 | Ener-Core Power, Inc. | Multi-combustor turbine |
US9017618B2 (en) | 2012-03-09 | 2015-04-28 | Ener-Core Power, Inc. | Gradual oxidation with heat exchange media |
US9328660B2 (en) | 2012-03-09 | 2016-05-03 | Ener-Core Power, Inc. | Gradual oxidation and multiple flow paths |
US8807989B2 (en) | 2012-03-09 | 2014-08-19 | Ener-Core Power, Inc. | Staged gradual oxidation |
US9567903B2 (en) | 2012-03-09 | 2017-02-14 | Ener-Core Power, Inc. | Gradual oxidation with heat transfer |
US9534780B2 (en) | 2012-03-09 | 2017-01-03 | Ener-Core Power, Inc. | Hybrid gradual oxidation |
US9353946B2 (en) | 2012-03-09 | 2016-05-31 | Ener-Core Power, Inc. | Gradual oxidation with heat transfer |
US9206980B2 (en) | 2012-03-09 | 2015-12-08 | Ener-Core Power, Inc. | Gradual oxidation and autoignition temperature controls |
US8980192B2 (en) | 2012-03-09 | 2015-03-17 | Ener-Core Power, Inc. | Gradual oxidation below flameout temperature |
US9726374B2 (en) | 2012-03-09 | 2017-08-08 | Ener-Core Power, Inc. | Gradual oxidation with flue gas |
US8844473B2 (en) | 2012-03-09 | 2014-09-30 | Ener-Core Power, Inc. | Gradual oxidation with reciprocating engine |
US9347664B2 (en) | 2012-03-09 | 2016-05-24 | Ener-Core Power, Inc. | Gradual oxidation with heat control |
US8671917B2 (en) | 2012-03-09 | 2014-03-18 | Ener-Core Power, Inc. | Gradual oxidation with reciprocating engine |
US9359948B2 (en) | 2012-03-09 | 2016-06-07 | Ener-Core Power, Inc. | Gradual oxidation with heat control |
US8926917B2 (en) | 2012-03-09 | 2015-01-06 | Ener-Core Power, Inc. | Gradual oxidation with adiabatic temperature above flameout temperature |
US9381484B2 (en) | 2012-03-09 | 2016-07-05 | Ener-Core Power, Inc. | Gradual oxidation with adiabatic temperature above flameout temperature |
US9359947B2 (en) | 2012-03-09 | 2016-06-07 | Ener-Core Power, Inc. | Gradual oxidation with heat control |
US8980193B2 (en) | 2012-03-09 | 2015-03-17 | Ener-Core Power, Inc. | Gradual oxidation and multiple flow paths |
US9273608B2 (en) | 2012-03-09 | 2016-03-01 | Ener-Core Power, Inc. | Gradual oxidation and autoignition temperature controls |
US9371993B2 (en) | 2012-03-09 | 2016-06-21 | Ener-Core Power, Inc. | Gradual oxidation below flameout temperature |
US9267432B2 (en) | 2012-03-09 | 2016-02-23 | Ener-Core Power, Inc. | Staged gradual oxidation |
US9328916B2 (en) | 2012-03-09 | 2016-05-03 | Ener-Core Power, Inc. | Gradual oxidation with heat control |
US9234660B2 (en) | 2012-03-09 | 2016-01-12 | Ener-Core Power, Inc. | Gradual oxidation with heat transfer |
EP2708609A1 (fr) * | 2012-09-17 | 2014-03-19 | Linde Aktiengesellschaft | Système et procédé de traitement par induction de métaux |
JP5939106B2 (ja) * | 2012-09-24 | 2016-06-22 | 株式会社明電舎 | 誘導加熱装置 |
WO2014085512A1 (fr) * | 2012-11-29 | 2014-06-05 | Glasslined Technologies, Inc. | Procédés permettant de préparer et de réparer des revêtements chimiquement résistants |
US9675999B1 (en) | 2014-05-15 | 2017-06-13 | Glasslined Technologies, Inc. | Facile chemically-resistant coatings |
WO2018147761A1 (fr) * | 2017-02-08 | 2018-08-16 | Лев Захарович ДУДАРЕВ | Unité de chauffage torique par induction de liquides |
JP7277985B2 (ja) * | 2017-04-28 | 2023-05-19 | マイクロコントロールシステムズ株式会社 | 加工装置又は加工システム用の発電装置及び発電システム、並びに当該加工装置又は加工システム |
Citations (3)
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US1749700A (en) * | 1925-12-29 | 1930-03-04 | Fourment Marcel | Apparatus for the continuous treatment of metal bodies |
JPS5719336A (en) * | 1980-07-11 | 1982-02-01 | Nippon Kokan Kk <Nkk> | Continuous annealing furnace having induction heating part |
GB2155740A (en) * | 1984-02-23 | 1985-09-25 | Davy Mckee | Transverse flux induction heaters |
Family Cites Families (9)
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US1749770A (en) * | 1927-09-24 | 1930-03-11 | Leon A Kamradt | Mold and core for line-casting machines |
US2453019A (en) * | 1947-04-30 | 1948-11-02 | Linde Air Prod Co | Metal surface conditioning process |
US2881297A (en) * | 1957-07-29 | 1959-04-07 | Nat Machinery Co | Metal working apparatus |
US3860737A (en) * | 1974-01-11 | 1975-01-14 | Gte Sylvania Inc | Furnace and method for induction heating moving quantities of material |
US4227061A (en) * | 1976-11-19 | 1980-10-07 | Copperweld Corporation | Method and apparatus for cladding a metal rod with another metal |
US4370357A (en) * | 1981-03-11 | 1983-01-25 | Cleveland Gear Company | Process of continuous metal coating |
GB2100641B (en) * | 1981-06-11 | 1985-10-09 | Kawasaki Steel Co | A method of manufacturing bimetallic tubes. |
US5412185A (en) * | 1993-11-29 | 1995-05-02 | General Electric Company | Induction heating of polymer matrix composites in an autoclave |
JP3180603B2 (ja) * | 1995-02-07 | 2001-06-25 | 信越化学工業株式会社 | 金属窒化物製造用流動層反応装置 |
-
1996
- 1996-08-02 FR FR9609823A patent/FR2752134B1/fr not_active Expired - Lifetime
-
1997
- 1997-08-01 DE DE69725792T patent/DE69725792T2/de not_active Expired - Lifetime
- 1997-08-01 EP EP97401866A patent/EP0822733B1/fr not_active Expired - Lifetime
- 1997-08-01 US US08/905,088 patent/US5895599A/en not_active Expired - Lifetime
- 1997-08-01 AT AT97401866T patent/ATE253289T1/de active
- 1997-08-01 DE DE0822733T patent/DE822733T1/de active Pending
- 1997-08-04 JP JP22190197A patent/JP4011158B2/ja not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1749700A (en) * | 1925-12-29 | 1930-03-04 | Fourment Marcel | Apparatus for the continuous treatment of metal bodies |
JPS5719336A (en) * | 1980-07-11 | 1982-02-01 | Nippon Kokan Kk <Nkk> | Continuous annealing furnace having induction heating part |
GB2155740A (en) * | 1984-02-23 | 1985-09-25 | Davy Mckee | Transverse flux induction heaters |
Non-Patent Citations (1)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 006, no. 090 (C - 104) 27 May 1982 (1982-05-27) * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000052965A2 (fr) * | 1999-03-01 | 2000-09-08 | Avestapolarit Aktiebolag (Publ) | Procede permettant de chauffer une bande metallique et appareil correspondant |
WO2000052965A3 (fr) * | 1999-03-01 | 2000-12-28 | Avesta Sheffield Aktiebolag Pu | Procede permettant de chauffer une bande metallique et appareil correspondant |
US6608290B1 (en) | 1999-03-01 | 2003-08-19 | Avesta Sheffield Aktiebolag | Method of heating metal strip and apparatus thereof |
US6693264B2 (en) | 2001-03-06 | 2004-02-17 | Celes | Vacuum and gas tight enclosure for induction heating system |
EP2216418A1 (fr) * | 2007-09-27 | 2010-08-11 | Nippon Steel Corporation | Structure d'isolation d'une bobine de chauffage par induction |
EP2216418A4 (fr) * | 2007-09-27 | 2013-05-29 | Nippon Steel & Sumitomo Metal Corp | Structure d'isolation d'une bobine de chauffage par induction |
US10080261B2 (en) | 2007-09-27 | 2018-09-18 | Nippon Steel & Sumitomo Metal Corporation | Insulated structure of induction heating coil |
Also Published As
Publication number | Publication date |
---|---|
JPH10116680A (ja) | 1998-05-06 |
DE69725792D1 (de) | 2003-12-04 |
JP4011158B2 (ja) | 2007-11-21 |
DE69725792T2 (de) | 2004-05-13 |
FR2752134A1 (fr) | 1998-02-06 |
DE822733T1 (de) | 1998-11-12 |
ATE253289T1 (de) | 2003-11-15 |
US5895599A (en) | 1999-04-20 |
EP0822733B1 (fr) | 2003-10-29 |
FR2752134B1 (fr) | 2003-12-26 |
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