EP3420112A1 - Dispositif et procédé pour le traitement thermique d'un produit plat - Google Patents

Dispositif et procédé pour le traitement thermique d'un produit plat

Info

Publication number
EP3420112A1
EP3420112A1 EP17705604.1A EP17705604A EP3420112A1 EP 3420112 A1 EP3420112 A1 EP 3420112A1 EP 17705604 A EP17705604 A EP 17705604A EP 3420112 A1 EP3420112 A1 EP 3420112A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
zones
gas
flat product
gas outlet
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.)
Pending
Application number
EP17705604.1A
Other languages
German (de)
English (en)
Inventor
Christian Wuppermann
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.)
LOI Thermprocess GmbH
Original Assignee
LOI Thermprocess GmbH
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 LOI Thermprocess GmbH filed Critical LOI Thermprocess GmbH
Publication of EP3420112A1 publication Critical patent/EP3420112A1/fr
Pending legal-status Critical Current

Links

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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • 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
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling

Definitions

  • the invention relates to a device and a method for heat treatment of a flat product, in particular strip-shaped metal sheet, with a nozzle device having a first nozzle system and a second nozzle system, each nozzle system having at least one gas outlet opening, wherein the gas outlet opening in the first nozzle system the front side of the flat product and the gas outlet opening in the second nozzle system are directed towards the rear side of the flat product, with conveying means for guiding the flat product during the heat treatment by the nozzle device in the forward direction.
  • Flat product is understood to mean sheet material which may consist of any material, in particular of metal, which is usually heat-treated in a continuous process. Heat treatment is understood to mean the cooling or heating.
  • a band-shaped sheet metal is conveyed continuously in the direction of passage through the nozzle device by means of conveying means, generally pairs of rolls, between which the sheet is guided.
  • the heat treatment of sheet metal for the purpose of cooling is preceded by heating, in particular in annealing processes for the titration of defined material properties.
  • Industrial furnace plants are used for annealing sheet metal or steel strip.
  • the sheets are heated in an industrial furnace and then rapidly quenched in the continuous cooling direction.
  • the rapid cool down ⁇ len is used to generate a particular microstructure or the transformation of the microstructure of the sheet structure.
  • liquid coolant usually water, used under elevated pressure.
  • cooling rollers or water spray cooling are used in practice.
  • the disadvantage here is the contamination of the sheet metal surface due to the mechanical contact of the sheet with the cooling rollers or the undesirable contamination of the sheet surface with the liquid cooling medium.
  • the convective heat treatment of sheets with technical gases in a continuous process by means of nozzles, gas nozzle systems or nozzle fields. which are directed to the front and the back of the sheet is known in practice.
  • the nozzle system may have a slot-shaped outlet opening for the gas, which extends over the entire width of the nozzle system.
  • nozzle systems with a plurality of nozzle outlet openings are also known.
  • the heat transfer coefficient increases as a function of the nozzle exit velocity. Rapid cooling of sheets, for example with high heat transfer air, can be achieved by means of intense impingement flow from nozzles directed at the sheet surface.
  • the object of the invention is accordingly to provide a device and a ⁇ Ver drive of the type mentioned for heat treatment of flat products, In particular of thin metal sheets to improve so that the aforementioned problems are avoided, so that, in particular at high nozzle exit speeds optimum stability of the flat product is ensured during the passage.
  • the object is achieved by a device according to claim 1.
  • each nozzle system has at least three zones transverse to the passage direction, that a first zone is located between second zones, that each zone has a gas supply, that the gas supply and the at least one gas outlet opening in the first Are arranged for the exit of the gas with a maximum flow, that the second zones extending from the longitudinal edges of the flat product in the direction of the first zone and that the gas supply or the at least one gas outlet opening in the second zones is set up for an adjustable volume flow or ., so that during the heat treatment, the volumetric flow of the gas in the second zones is adjustable such that vibrations or vibrations of the flat product during the heat treatment are avoided or minimized.
  • the middle of the flat product is subjected to a maximum gas volume flow in the first zone, so that in the first zone a maximum heat transfer is achieved.
  • the volume flow is reduced compared to the maximum gas volume flow with which the center of the flat product is acted upon.
  • the device according to the invention in the context of an annealing process for thin sheets, since these, compared to sheets with larger sheet thickness, can be excited with lower nozzle exit speeds to vibra ⁇ tions with high amplitudes.
  • each nozzle system has at least five zones transverse to the direction of passage, that third zones are located next to the second zones, that the third zones extend from the longitudinal edges of the flat product next to the flat product and that the gas supply or the at least one gas outlet opening in the third zones is at least partially closed.
  • the belt stability is further improved if the gas supply in the third zones is partially closed or preferably interrupted.
  • the gas supply or the at least one gas outlet opening in the second zones and / or third zones by means of at least one adjustment, preferably controlled or regulated, at least partially closed.
  • the adjusting member can be actuated by means of a, in particular mechanical, electrical or pneumatic drive.
  • the gas supply in the second zones can be partially closed with an adjusting member, so that the volume flow of the gas is adjustable or variable.
  • the gas outlet openings in the second zones can be partially closed by means of an adjusting member or a plurality of adjusting members, so that the volume flow is adjustable.
  • the free passage cross section of the at least one gas outlet opening is variable.
  • the gas supply in the third zones is preferably completely closable.
  • the gas outlet openings in the third zones can preferably be completely closed by means of an adjusting member or by means of a plurality of adjusting members.
  • An adjusting or more Verstellor ⁇ organs can be used per zone.
  • the adjusting member in the gas supply of the second zone may be formed as a flap or as a valve.
  • the adjustment member may be formed so that upon an adjustment of the free fürtnttsquerrough is at least one gas from ⁇ opening reduced in the second zones.
  • the free passage cross section for the gas is variable.
  • the Verstellor ⁇ gan in the gas supply is preferably designed as a shut-off.
  • each nozzle system has a slot-shaped gas outlet opening, in particular a slot nozzle, which extends over the width of the nozzle system.
  • each nozzle system may have a multiplicity of "gas outlet openings which extend across the width of the nozzle system.
  • a particularly advantageous development of the invention is "" which is connected to a gas source that each nozzle system comprises a nozzle box, that a plurality of nozzle bars are connected to each nozzle box, the horruiten over the length in the travel direction and spaced transversely to the direction of passage are arranged each other in that the nozzle bars extend from the nozzle box in the direction of the flat product, so that outflow channels are formed between the nozzle bars and that each nozzle bar has at least one gas outlet opening.
  • each nozzle bar tapers in the direction of the flat product.
  • the passage cross section for the gas is thus trapezoidal. This embodiment ensures that the gas after the heat exchange on the flat product can flow out particularly well perpendicularly between the nozzle bars.
  • a preferred embodiment is characterized in that each nozzle bar over its length in the direction of passage has the same size gas outlet openings, which are preferably circular and in at least one row behind the other, preferably at equal distances from each other, are distributed over the nozzle bar.
  • the gas which emerges from the gas outlet openings is preferably directed perpendicular to the flat product.
  • a development consists in that the at least one gas outlet opening is formed at the gas outlet end of a nozzle body, which extends in the direction of the flat product.
  • each nozzle bar which is located in the second zones and / or the third zones, depending on an adjusting member, with each of which all gas outlet openings in a nozzle bar parallel at least partially closed.
  • each nozzle system or nozzle box is in the direction of the flat product, preferably continuously, displaceable.
  • the nozzle systems are preferably aligned parallel to the flat product.
  • the invention further includes a method for vorme accompaniment a flat product, in particular a strip-shaped metal sheet, in a nozzle nozzle having a first nozzle system and a second nozzle system, emerges from each nozzle system at least one gas jet from at least one gas outlet opening, wherein the gas jet which emerges from the gas outlet opening in the first nozzle system, is directed to the front side of the flat product, and the gas jet emerging from the gas outlet opening in the second nozzle system is directed towards the rear side of the flat product and wherein the flat product during the heat treatment by means of conveying through the Nozzle device is guided in the direction of passage, characterized in that each nozzle system transversely to the direction of passage has at least three zones, that is a first zone between the second zones, wherein in the first zone of the gas jet from the G As a result, the second zone
  • the gas volume flow in the second zones is less than the maximum gas volume flow in the first zone.
  • each nozzle system transversely to the direction of passage has at least five zones, that in addition to the second zones in each case third zones are that the third zones extending from the longitudinal edges of the flat product next to the flat product and the volume flow of the gas in the third zones is interrupted during the heat treatment.
  • the invention offers the advantageous possibility that the width of the flat product is measured and, in each case, the width of the second zones and / or the third zones is / are determined as a function of the measurement result.
  • the width of the second zones should be as narrow as possible and be selected so that the gas jet (s) act on the longitudinal edge of the flat product.
  • the flat product is formed as a band-shaped metal sheet, which is heated to annealing temperature before entering the nozzle device and in the nozzle device, in particular to a predetermined temperature. is cooled. Consequently, the nozzle device is designed as a cooling zone, which is preceded by a heating zone.
  • Figure 1 is a schematic representation of a plan view of a nozzle system of a device according to the invention.
  • Fig. 2 is a schematic diagram of the cross section of a first embodiment of
  • Fig. 2 is a schematic diagram of the cross section of a second embodiment of the device according to the invention.
  • Fig. 1 is a schematic plan view of a nozzle system 1 of a device according to the invention is shown.
  • it is a device for cooling thin sheets of steel with a cooling gas, here air.
  • a plate 2 ' which is to be annealed is heated in an unillustrated industrial furnace to a predetermined temperature and maintained during a holding phase at a temperature.
  • the sheet 2 passes through the device according to the invention vertically by means of conveying means, not shown, which are formed as two spaced roller pairs, in the direction of passage D.
  • the sheet 2 is cooled in the device according to the invention during a cooling phase to ambient temperature.
  • the sheet is centered with its middle between the nozzle system 1 and the not shown identically constructed second nozzle system.
  • Each nozzle system is continuously displaceable in the direction of the sheet 2.
  • the nozzle system 1 has, transversely to the direction of passage, a first zone 3, second zones 4a and 4b and third zones 5a and 5b.
  • the first zone 3 runs in the middle.
  • Two second zones 4a and 4b extend from the longitudinal edges 6a and 6b of the sheet 2 in the direction of the first zone 3.
  • the two second zones 4a and 4b are followed by the third zones 5a and 5b.
  • the two third zones 5a and 5b extending from the longitudinal edges 6a, 6b of the sheet 2 adjacent to the sheet.
  • each zone there are a plurality of gas outlet openings, not shown in FIG. Fig. 2 shows a schematic diagram of the cross section of a first embodiment of the device according to the invention.
  • a nozzle box 7 is connected to a gas source 8 in the form of a fan.
  • the gas outlet openings, not shown in FIG. 2, in the first zone 3 are connected to the nozzle box 7 by means of a gas feed 9.
  • the gas outlet openings in the first zone 3 are set up for the outlet of the cooling air with a maximum volume flow.
  • the gas outlet openings are connected to the nozzle box 7 by means of the gas supply lines 10a and 10b.
  • a respective adjusting member 12a, 12b in the gas feeds 10a and 10b By means of a respective adjusting member 12a, 12b in the gas feeds 10a and 10b, the volume flow of the gas during the heat treatment in the second zones 4a, 4b is reduced such that vibrations of the sheet, in particular in the direction of the gas outlet, during the heat treatment avoided or be minimized.
  • the volume flow of the cooling air which acts directly on the sheet longitudinal edges 6a, 6b, lower than the maximum volume flow, which acts in the first zone 3, the center of the sheet 2.
  • the width of the second zones 4a, 4b is selected such that the reduced cooling gas volume flow exiting from the gas outlet opening 21a, 21b in the second zones 4a, 4b still fully loads the sheet longitudinal edges 6a, 6b.
  • FIG. 3 shows a schematic diagram of the cross section of a second embodiment of the device according to the invention.
  • FIG. 3 schematically shows that nozzle bars 14-16 extend across the entire width of the nozzle system transversely to the passage direction D of the sheet 2.
  • the first zone 3 is formed by a plurality of nozzle bars, of which only one nozzle bar 14 is shown.
  • Gas outlet openings 20 in the nozzle bars 14 in the first zone 3 are set up for the outlet of the cooling air with a maximum volume flow.
  • each gas outlet opening 20 - 22 has the same distance from the flat product 2. From all gas outlet openings, the gas exits substantially perpendicularly in the direction of the flat product.
  • the second zones 4a " 4b are each formed by a dowel bar 15a, 15b.
  • the third zones 5a, 5b can be formed by one or more nozzle bars.
  • a measuring device 19 is shown, with which the width of the sheet 2 is measured. Depending on the measurement result, the width of the second zones and the third zones is determined.
  • the nozzle bars 14-18 have the same width across the width of the nozzle system i.
  • the nozzle bars 14-16 extend from a nozzle box 7 in the direction of the sheet 2 and are embodied in the embodiment illustrated here with a trapezoidal cross-section. This embodiment ensures that the air heated at the sheet metal surface can flow out particularly well perpendicularly from the sheet metal surface between the nozzle bars.
  • Each nozzle bar 14-16 has over its length in the direction of passage on the same size gas outlet openings, which are circular and in a row one after another with equal distances from each other, are distributed over the nozzle bar.
  • the passage cross sections of all the gas outlet openings 21a, 21b in the nozzle bars 15a, 15b in the second zones can be changed in parallel by means of adjusting members 17a, 17b in order to reduce the volume flow of the gas during the heat treatment in the second zones 4a, 4b such that vibrations or vibrations of the sheet, in particular in the direction of the gas outlet openings during the heat treatment can be avoided or minimized.
  • Fig. 3 it is shown that each nozzle bar 16a, 16b, which is located in the third zones 5a, 5b, each having an adjusting member 18a, 18b, with each of all gas outlet openings 22a, 22b are closed in parallel in this nozzle bar.
  • nozzle bars In the direction of passage, several nozzle bars can be arranged one behind the other.
  • another suitable technical gas can be used instead of air.
  • the adjusting members can each be actuated by means of one, in particular mechanical, electric or pneumatic drive.
  • the gas outlet openings can not only be made round, but can also have any other geometry, for example angular or slot-shaped. Also, any variants of shapes are possible.
  • the at least one gas outlet opening may be formed at the gas outlet end of a nozzle body, wherein the nozzle body extends in the direction of the flat product.
  • tubular nozzles can be used.

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)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

L'invention concerne un dispositif et un procédé pour le traitement thermique d'un produit plat, en particulier d'une tôle sous forme de bande en métal, présentant un dispositif à buses, qui présente un premier système de buse et un deuxième système de buse, chaque système de buse présentant au moins une ouverture de sortie de gaz, l'ouverture de sortie de gaz dans le premier système de buse étant orientée sur la face avant du produit plat et l'ouverture de sortie de gaz dans le deuxième système de buse étant orientée sur la face arrière du produit plat, et des moyens de transport pour guider le produit plat pendant le traitement thermique à travers le dispositif à buses dans le sens du passage (D). Selon l'invention, chaque système de buse (1) présente, transversalement par rapport au sens du passage (D), au moins trois zones (3, 4a, 4b), une première zone (3) se trouvant entre les deuxièmes zones (4a, 4b). Chaque zone présente une alimentation en gaz (9, 10a, 10b), l'alimentation en gaz (9) et ladite au moins une ouverture (20) de sortie de gaz dans la première zone (3) étant conçues pour la sortie du gaz à un flux volumique maximal. Les deuxièmes zones (4a, 4b) s'étendent, partant des côtés longitudinaux (6a, 6b) du produit plat (2), vers la première zone (3). Les alimentations en gaz (10a, 10b) ou ladite au moins une ouverture (21a, 21b) de sortie des gaz dans les deuxième zones (4a, 4b) sont conçues pour un flux volumique réglable de manière telle que pendant le traitement thermique, le flux volumique du gaz dans les deuxièmes zones (4a, 4b) peut être réglé de sorte que les oscillations de la tôle pendant le traitement thermique sont évitées ou minimalisées.
EP17705604.1A 2016-02-22 2017-02-14 Dispositif et procédé pour le traitement thermique d'un produit plat Pending EP3420112A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016103079.1A DE102016103079A1 (de) 2016-02-22 2016-02-22 Einrichtung und Verfahren zur Wärmebehandlung eines Flacherzeugnisses
PCT/EP2017/053333 WO2017144315A1 (fr) 2016-02-22 2017-02-14 Dispositif et procédé pour le traitement thermique d'un produit plat

Publications (1)

Publication Number Publication Date
EP3420112A1 true EP3420112A1 (fr) 2019-01-02

Family

ID=58054122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17705604.1A Pending EP3420112A1 (fr) 2016-02-22 2017-02-14 Dispositif et procédé pour le traitement thermique d'un produit plat

Country Status (3)

Country Link
EP (1) EP3420112A1 (fr)
DE (1) DE102016103079A1 (fr)
WO (1) WO2017144315A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210084433A (ko) * 2018-10-30 2021-07-07 타타 스틸 이즈무이덴 베.뷔. 강철 스트립을 위한 어닐링 라인
DE102021212523A1 (de) 2021-05-31 2022-12-01 Sms Group Gmbh Forcierte Luftkühlung zur Kühlung von Langstahlerzeugnissen
CN115101444B (zh) * 2022-06-22 2023-07-14 北京北方华创微电子装备有限公司 承载装置及半导体工艺设备

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US5182074A (en) * 1990-07-31 1993-01-26 Nkk Corporation Apparatus for continuously cooling metal strip
GB2352731A (en) * 1999-07-29 2001-02-07 British Steel Plc Strip cooling apparatus

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DE1097942B (de) * 1958-05-24 1961-01-26 Krantz Soehne H Duesenanordnung zur schwebenden Fuehrung von Warenbahnen in Duesentrocknern
DD252227A1 (de) * 1986-08-29 1987-12-09 Textima Veb K Vorrichtung zur waermebehandlung einer warenbahn, insbesondere textilbahn
DE3811620A1 (de) * 1988-04-07 1989-10-26 Vits Maschinenbau Gmbh Verfahren und vorrichtung zur waermebehandlung und/oder trocknung einer materialbahn im durchlauf
US5201132A (en) * 1991-04-26 1993-04-13 Busch Co. Strip cooling, heating or drying apparatus and associated method
FR2796139B1 (fr) * 1999-07-06 2001-11-09 Stein Heurtey Procede et dispositif de suppression de la vibration des bandes dans des zones de soufflage de gaz, notamment des zones de refroidissement
PL2100673T3 (pl) * 2008-03-14 2011-06-30 Arcelormittal France Sposób i urządzenie do nadmuchiwania gazu na przemieszczającą się taśmę
FR2931165B1 (fr) * 2008-05-13 2010-11-26 Cmi Thermline Services Dispositif de soufflage de gaz sur une face d'un materiau en bande en defilement
DE102011056823A1 (de) * 2011-12-21 2013-06-27 Thyssen Krupp Steel Europe AG Düseneinrichtung für einen Ofen zum Wärmebehandeln eines Stahlflachprodukts und mit einer solchen Düseneinrichtung ausgestatteter Ofen

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Publication number Priority date Publication date Assignee Title
US5182074A (en) * 1990-07-31 1993-01-26 Nkk Corporation Apparatus for continuously cooling metal strip
GB2352731A (en) * 1999-07-29 2001-02-07 British Steel Plc Strip cooling apparatus

Non-Patent Citations (1)

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Title
See also references of WO2017144315A1 *

Also Published As

Publication number Publication date
DE102016103079A1 (de) 2017-08-24
WO2017144315A1 (fr) 2017-08-31

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