EP1490524B2 - Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la surface d'une piece - Google Patents

Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la surface d'une piece Download PDF

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Publication number
EP1490524B2
EP1490524B2 EP03717150A EP03717150A EP1490524B2 EP 1490524 B2 EP1490524 B2 EP 1490524B2 EP 03717150 A EP03717150 A EP 03717150A EP 03717150 A EP03717150 A EP 03717150A EP 1490524 B2 EP1490524 B2 EP 1490524B2
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EP
European Patent Office
Prior art keywords
heat transfer
nozzle
transfer medium
coil
faces
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Expired - Lifetime
Application number
EP03717150A
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German (de)
English (en)
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EP1490524B1 (fr
EP1490524A2 (fr
Inventor
Rolf-Josef Schwartz
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SCHWARTZ, EVA
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Individual
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Priority claimed from DE10227499A external-priority patent/DE10227499A1/de
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    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • 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

Definitions

  • the invention relates to a method for convective heat transfer between a heat transfer medium and the end faces of a wound metal strip in the form of a coil, wherein the end faces of the metal strip are acted upon by means of at least one rotatable nozzle wall with the heat transfer medium.
  • the invention further relates to an apparatus for carrying out the method for convective heat transfer between a heat transfer medium and the end faces of a wound metal strip.
  • German Patent 35 03 089 C2 is a device for uniform loading of a flat surface of a workpiece with a gas known.
  • the surface of the workpiece is in particular the end face of a cylindrical band collar.
  • the admission of the gas takes place via slot-shaped nozzle openings in a nozzle bottom, wherein the nozzle openings are at an angle to the surface of the band.
  • German Patent 196 50 965 C1 is a device for uniformly applying a flat surface of a workpiece with a fluid known.
  • the surface of the workpiece is preferably also the end face of a cylindrical band collar.
  • the nozzle bottom for the application of the fluid is designed such that at the nozzle openings means for deflecting the nozzle jets are provided in a direction which forms an angle with the perpendicular to the nozzle bottom or at a substantially plane nozzle bottom with its planar reference surface.
  • the object of the invention is therefore to provide a method for convective heat transfer between a heat transfer medium and a surface, in particular the front side of a metal strip in the form of a wound cylindrical coil, through which the most uniform and high heat transfer is realized, without causing adverse effects Workpiece comes.
  • the object of the invention is also to provide a device for carrying out the method.
  • this object is achieved in that in the convective heat transfer between a heat transfer medium and the end faces of a wound metal strip in the form of a coil both end faces of the metal strip are acted upon by the heat transfer means by means of a respective rotatable nozzle wall with the heat transfer medium, wherein the heat transfer medium through a plurality of nozzle openings Nozzle wall flows and move during the heat treatment both nozzle walls and the end faces of the metal strip to each other.
  • a generic device for convective heat transfer between a heat transfer medium and the end faces of a wound metal strip in the form of a coil means for acting on the end faces of the metal strip are provided with the heat transfer means by means of at least one rotatable nozzle wall, wherein on both end sides a rotatable nozzle wall is arranged in each case of the metal strip, and a nozzle wall has a plurality of nozzle openings, and both nozzle walls and the end faces of the metal strip are movable relative to one another during the heat treatment.
  • the nozzle walls are movable while the coil is fixed, or a design includes both movable nozzle walls and moving coils.
  • a design has been selected in which the nozzle walls are movable during the heat treatment and the coil is fixed.
  • a chamber furnace of known design is equipped so that at the two end faces of an inserted cylindrical coil each have a nozzle wall which is rotatable about an axis of rotation, wherein the axis of rotation preferably corresponds to the major axis of the cylindrical coil or substantially parallel to this.
  • the term "substantially” includes angles of the order of 0 ° and 10 °.
  • the rotatable nozzle walls are provided with a plurality of nozzles whose arrangement and design is suitable for the purpose selected. For example, known hole, tube, slot and / or twist nozzles can be used.
  • a gas is conveyed as a heat transfer medium via a pressure box in the nozzle walls and flows through the nozzles on the end faces of the coil to be heated or cooled. Due to the rotation of the nozzle walls, the two end faces are uniformly charged with the gas, so that a very good heat transfer is ensured on the surface. Furthermore, due to the uniform application, there are no local temperature peaks or sinks at which areas of the workpiece to be treated are overheated or undercooled.
  • FIG. 1 is a section through a particularly preferred embodiment of a device for convective heat transfer between a heat transfer medium and a surface, in particular the end face of a wound metal strip in the form of a cylindrical coil shown.
  • a heat transfer medium a fluid or a gas may be used.
  • a gas is used for heat transfer.
  • the device comprises a pressure box 20 into which the coil 30 to be heated or cooled is introduced.
  • the coil is a cylindrically wound metal band.
  • the metal strip shown is wound around an axis 70, which runs horizontally in the figure, so that plane surfaces result on the end faces 31 and 32 of the coil.
  • a nozzle wall 10 and 11 is located substantially parallel to these end faces of the coil.
  • the mobility of the nozzle walls and the end faces of the coil to each other is achieved in the illustrated embodiment by movable nozzle walls, while the coil is fixed during the heat treatment.
  • the nozzle walls 10 and 11 are rotatable about a rotation axis 71, which preferably corresponds to the main axis 70 of the cylindrical coil 30 or extends substantially parallel thereto.
  • the rotation of the nozzle walls via a drive 40, the in Fig. 1 is not shown in detail, but is characterized by ellipsoid motion arrows.
  • the gas for heating or cooling of the coils are introduced into the pressure box 20.
  • the gas may be different types of gas suitable for the particular application.
  • N 2 , N 2 H 2 , air, water vapor, inert gas, hydrogen, exogas, or endogas can be used.
  • the flow of the gas within the pressure box is indicated graphically by arrows.
  • the gas flows through the nozzle walls 10 and 11 on each one end side of the coil.
  • the nozzle walls have for this purpose a plurality of openings, which may be formed differently.
  • slot nozzles 50 were selected, as shown in the figure Fig. 2 can be seen.
  • the gas flows out of the nozzle openings and bounces on the front sides of the coil, where the heat transfer takes place. This applies both to the heating and to the cooling of the coil material.
  • the seal can be adapted to the requirements in various ways.
  • the sealing gap can be low or the seal can be designed as a labyrinth or contact seal.
  • Fig. 2 is a plan to refer to a pressure chamber 20 with a circular nozzle wall 10.
  • the rotating nozzle wall is designed in this embodiment with slot nozzles 50.
  • other types of nozzles such as perforated, tubular or swirl nozzles can be used.
  • Pipe nozzles may be provided, for example, with an inner swirl body, as in Fig. 4 is shown.
  • FIG. 3 In the picture in Fig. 3 is a particularly preferred embodiment of a chamber furnace with integrated erfindunmonuxer device for heat transfer shown.
  • the pressure box 20 is located within the furnace and a coil 30 to be heated or cooled is positioned between the two nozzle walls 10 and 11.
  • the charging of the furnace with a coil takes place in this embodiment from below, which is shown graphically below the chamber of the furnace by dashed lines.
  • the control of the chamber furnace preferably takes place via control means with a program which expediently controls and regulates at least the temperature and the speed of the heat transfer medium in such a way that the best possible heat transfer is achieved. If an embodiment is selected with nozzle walls that are movable along their axis of rotation, the distance between the nozzle wall and end face of the coil can also be controlled and regulated so that the best possible flow adjusts.
  • FIG. 4 A preferred embodiment of one of the nozzles arranged in the nozzle walls 10, 11 is shown in the form of a pipe nozzle 81 with a swirl body 82 arranged therein.
  • the inventive design of a device with nozzle walls which are designed to be movable to the end faces of the coils to be heated or cooled, has various advantages.
  • uniformly charging the coil with the gas there are no temperature peaks or sinks, which could lead to a deterioration of the coil material.
  • the uniform loading of the coil with the heat transfer medium also leads to a better heat transfer than in conventional systems, whereby the residence time of the workpieces can be lowered in the ovens. This allows energy savings and a reduction in throughput times.
  • the installation of a separating nozzle box additionally improves the degree of utilization of the system.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (13)

  1. Procédé de transmission thermique par convection entre un agent de transmission thermique et les faces frontales d'une bande métallique enroulée en forme de bobine, les faces frontales de la bande métallique étant soumises à l'agent de transmission thermique au moyen d'au moins une paroi rotative à buses, caractérisé en ce que les deux faces frontales de la bande métallique sont chacune soumises à l'agent de transmission thermique au moyen de respectivement une paroi rotative à buses (10; 11), l'agent de transmission thermique passant par plusieurs orifices de buses d'une paroi à buses (10; 11), et les deux parois à buses (10; 11) et les faces frontales de la bande métallique se déplaçant les unes relativement aux autres pendant le traitement thermique.
  2. Dispositif de transmission thermique par convection entre un agent de transmission thermique et les faces frontales d'une bande métallique enroulée en forme de bobine, le dispositif prévoyant des moyens pour soumettre les faces frontales de la bande métallique à l'agent de transmission thermique au moyen d'au moins une paroi rotative à buses, caractérisé en ce qu'une paroi rotative à buses (10; 11) est située de chacun des deux côtés frontaux de la bande métallique, une paroi à buses (10; 11) comportant plusieurs orifices de buses, et les deux parois à buses (10; 11) et les faces frontales de la bande métallique étant déplaçables les unes relativement aux autres pendant le traitement thermique.
  3. Dispositif selon la revendication 2, caractérisé en ce que les parois à buses (10; 11) sont rotatives autour d'un axe de rotation (71) qui correspond à l'axe principal (70) d'une bobine (30) ou est sensiblement parallèle à celui-ci, les parois à buses (10; 11) étant sensiblement parallèles aux faces frontales (31; 32) de la bobine.
  4. Dispositif selon l'une ou plusieurs des revendications précédentes 2 et 3, caractérisé en ce que l'agent de transmission thermique est un fluide ou un gaz.
  5. Dispositif selon l'une ou plusieurs des revendications 2 à 4, caractérisé en ce que le dispositif comprend au moins une boîte sous pression (20) dans laquelle sont disposées au moins une bobine (30) et deux parois à buses (10; 11), les parois à buses étant situées des côtés frontaux (31; 32) de la bobine (30).
  6. Dispositif selon la revendication 5, caractérisé en ce qu'un agent de transmission thermique peut être amené sur les faces frontales (31; 32) de la bobine (30) via la boîte sous pression (20) et les parois à buses (10; 11).
  7. Dispositif selon la revendication 6, caractérisé en ce qu'un ventilateur souffle un gaz dans et/ou au travers de la boîte sous pression (20).
  8. Dispositif selon l'une ou plusieurs des revendications 2 à 7, caractérisé en ce que les parois à buses (10; 11) comportent des buses fendues, tubulaires, percées et/ou à turbulence (50).
  9. Dispositif selon la revendication 8, caractérisé en ce que les parois à buses comportent des buses tubulaires (81) qui sont respectivement pourvues d'un corps de turbulence intérieur (82).
  10. Dispositif selon l'une ou plusieurs des revendications 5 à 9, caractérisé en ce que le joint entre les parois à buses (10; 11) et la boîte sous pression (20) se présente sous la forme d'un joint labyrinthe ou de contact.
  11. Dispositif selon l'une ou plusieurs des revendications 2 à 10, caractérisé en ce que le dispositif comporte des moyens de commande qui commandent au moins la température et la vitesse de l'agent de transmission thermique.
  12. Dispositif selon la revendication 11, caractérisé en ce que les moyens de commande incluent un programme de commande et de réglage qui commande au moins la température et la vitesse de l'agent de transmission thermique.
  13. Installation de four, caractérisée en ce qu'elle comporte au moins un dispositif permettant la transmission thermique par convection par un agent de transmission thermique sur une surface, le dispositif étant décrit par l'une ou plusieurs des revendications 2 à 13.
EP03717150A 2002-03-15 2003-03-17 Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la surface d'une piece Expired - Lifetime EP1490524B2 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10211749 2002-03-15
DE10211749 2002-03-15
DE10227499A DE10227499A1 (de) 2002-03-15 2002-06-19 Verfahren und Vorrichtung zur konvektiven Wärmeübertragung zwischen einem Wärmeübertragungsmittel und der Oberfläche eines Werkstückes
DE10227499 2002-06-19
PCT/DE2003/000864 WO2003078665A2 (fr) 2002-03-15 2003-03-17 Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la surface d'une piece

Publications (3)

Publication Number Publication Date
EP1490524A2 EP1490524A2 (fr) 2004-12-29
EP1490524B1 EP1490524B1 (fr) 2005-08-24
EP1490524B2 true EP1490524B2 (fr) 2009-01-21

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EP03717150A Expired - Lifetime EP1490524B2 (fr) 2002-03-15 2003-03-17 Procede et un dispositif pour transmettre la chaleur par convection entre un support de transmission thermique et la surface d'une piece

Country Status (4)

Country Link
EP (1) EP1490524B2 (fr)
AT (1) ATE302858T1 (fr)
AU (1) AU2003221601A1 (fr)
WO (1) WO2003078665A2 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3503089A1 (de) † 1985-01-30 1986-07-31 Carl Prof. Dr.-Ing. 5100 Aachen Kramer Vorrichtung zur gleichmaessigen beaufschlagung einer planen flaeche mit einem gas
EP0796920A1 (fr) † 1996-02-21 1997-09-24 Ipsen International GmbH Dispositif de trempe de pièces métalliques
DE19650965C1 (de) † 1996-12-07 1998-08-13 Kramer Carl Vorrichtung zur gleichmäßigen Beaufschlagung einer planen Oberfläche eines Werkstückes mit einem Fluid

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05177240A (ja) * 1992-01-07 1993-07-20 Nippon Steel Corp 熱延コイルの冷却方法
JP3370562B2 (ja) * 1997-03-31 2003-01-27 川崎製鉄株式会社 熱延コイルの冷却方法およびその装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3503089A1 (de) † 1985-01-30 1986-07-31 Carl Prof. Dr.-Ing. 5100 Aachen Kramer Vorrichtung zur gleichmaessigen beaufschlagung einer planen flaeche mit einem gas
EP0796920A1 (fr) † 1996-02-21 1997-09-24 Ipsen International GmbH Dispositif de trempe de pièces métalliques
DE19650965C1 (de) † 1996-12-07 1998-08-13 Kramer Carl Vorrichtung zur gleichmäßigen Beaufschlagung einer planen Oberfläche eines Werkstückes mit einem Fluid

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
BOUWMAN J.W.: "Einsatz von Vakuum-Öfen für das Härten von Werkzeugen", FACHBERICHTE HÜTTENPRAXIS METALLWEITERVERARBEITUNG, vol. HEFT 4, 1984, pages 1 - 7 †
BOUWMAN J.W.: "High-Pressure Gas-Quenching in vacuum furnaces - ...", METALLURGIA, vol. 52, no. 2, February 1985 (1985-02-01), pages 52 - 53 †
CONYBEAR J.A.: "Vacuum Hardening of H-13 Die Steels : ...", INDUSTRIAL HEATING, August 1993 (1993-08-01), pages 45 - 48 †
EDENHOFER B.; BOUWMAN J.W.: "Progress in Design and Use of Vacuum Furnaces with High Pressure Gas Quench Systems", INDUSTRIAL HEATING, February 1988 (1988-02-01), ENGLAND, pages 12 - 16 †

Also Published As

Publication number Publication date
WO2003078665A2 (fr) 2003-09-25
AU2003221601A1 (en) 2003-09-29
AU2003221601A8 (en) 2003-09-29
WO2003078665A3 (fr) 2003-12-18
EP1490524B1 (fr) 2005-08-24
ATE302858T1 (de) 2005-09-15
EP1490524A2 (fr) 2004-12-29

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