EP1626822B1 - Procede et dispositif pour refroidir ou tremper des brames et des toles avec de l'eau dans un bassin de refroidissement - Google Patents

Procede et dispositif pour refroidir ou tremper des brames et des toles avec de l'eau dans un bassin de refroidissement Download PDF

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Publication number
EP1626822B1
EP1626822B1 EP04731341A EP04731341A EP1626822B1 EP 1626822 B1 EP1626822 B1 EP 1626822B1 EP 04731341 A EP04731341 A EP 04731341A EP 04731341 A EP04731341 A EP 04731341A EP 1626822 B1 EP1626822 B1 EP 1626822B1
Authority
EP
European Patent Office
Prior art keywords
cooling
water
slabs
sheets
slab
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 - Lifetime
Application number
EP04731341A
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German (de)
English (en)
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EP1626822A1 (fr
Inventor
Dirk Schmidt
Harald Wehage
Frank Werner
Guenther Thues
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Ilsenburger Grobblech 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 SMS Demag AG, Ilsenburger Grobblech GmbH filed Critical SMS Demag AG
Priority claimed from DE102004023031A external-priority patent/DE102004023031A1/de
Publication of EP1626822A1 publication Critical patent/EP1626822A1/fr
Application granted granted Critical
Publication of EP1626822B1 publication Critical patent/EP1626822B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath quenching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/023—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes by immersion in a bath
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • 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
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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

Definitions

  • the invention relates to a method and apparatus for cooling or quenching of slabs and sheets with water in a cooling basin, in which the previously vertically erected by a tilting device slabs and sheets are lowered in a vertical position and temporarily adjusted.
  • a cooling device which consists of a cooling basin for receiving cooling water and a professional in the cooling basin adjustment framework for the vertical adjustment of the slabs by means of a movable over or along the cooling tank crane vehicle. This detects the slabs in a vertical position with suitable gripping devices, sets the slabs in the setting frame and lifts them after cooling back out.
  • a tilting device is arranged at the front end of the cooling bucket. Two independent tilting devices are also located in the area of supply and discharge roller tables for upending and depositing slabs.
  • the invention has for its object to provide a method and an apparatus of the type mentioned, with which can avoid the disadvantages mentioned and can achieve quenching with better quality.
  • This object is achieved by a method according to the invention in that the slabs and sheets are irradiated on both sides with cooling water.
  • a preferred embodiment of the invention provides that the slabs and sheets are completely immersed in a water-filled cooling tank and additionally irradiated with cooling water in the water bath of the cooling pool. It can be done here a kind of whirlpool deterrent or cooling.
  • An alternative embodiment provides that the water level is lowered in the cooling pool, the slabs and sheets protrude above the water level and are irradiated with cooling water.
  • One and the same system thus makes it possible, depending on e.g. the quality of the material to change the cooling process and on the same cooling system without other or additional facilities to carry out the cooling process either as jet operation or in Whirlpool operation, taking into account still different fresh water demand and temperature and water temperature, each starting from a start and a final temperature, which also vary can.
  • the cooling system can advantageously be based on a physical-mathematical cooling model that describes the transient time-temperature behavior of the sheet / slab with the boundary conditions of the temperature-dependent physical properties and the heat transfer coefficient, which depends on the local surface temperature of the slab / sheet Using the finite element method and the Fourier equation of thermal conductivity as well as the disassembly of the slab / sheet into individual layers, the temperature distribution over the cooling material thickness is calculated.
  • a fundamental problem in accelerated cooling is the exact description of the time course of the temperature fields within the rolling stock.
  • the calculation using mathematical models is a suitable tool for planning, controlling and optimizing the process.
  • the material characteristics are determined according to the alloy constituents or the material characteristic class for each good to be cooled. The corresponding calculations are then carried out using these temperature-dependent material characteristics.
  • the cooling model it is also possible to simulate calculations offline. Thereby, e.g. the different cooling rates for different amounts of water are compared to optimize the cooling process. These offline calculations can be triggered by the dialog described above. Thus, it is possible to return a protocol with the most important parameters and operating results to the PLS system. Also included are parameters and coefficients for material and constraints, e.g. in the temperature model.
  • the cooling basin on both sides of the lowered slabs / sheets with alignment on the broadside surfaces arranged nozzle means which are connected to a cooling water circuit the means for lowering the water filling of a maximum , Upper water level has a lower, lower water level.
  • the additional cooling water directly at the scene after adjusting the slab or sheet, blast onto it.
  • a constant over the entire surface nozzle spacing is maintained; depending on the requirement profile, this can be between 10 and 500 mm.
  • the sheet or the slab can be aligned accordingly by means of a hydraulically operated pressing device.
  • a preferred embodiment of the invention provides that the cooling pool is formed with raceways for a slab or a sheet receiving, lifting and lowering carriage. Carriage insertion and removal can be carried out very quickly.
  • the residence time for quenching slabs or sheets in the cooling basin is greater than 30 minutes.
  • the carriage is connected to a cable drive.
  • This preferably has guided on the carriage rope drums guided ropes, the rope drums are mechanically coupled to a frequency controlled three-phase motor.
  • the vertical lowering and lifting can be done with the cable drive in the shortest time interval; the time interval for the complete immersion of a slab / sheet is less than 10 seconds.
  • the good running ability of the carriage is favored here, when it is guided over rollers / wheels on the raceways.
  • a cooling system 20 shown in Fig. 1 consists of a cooling tank 1 and a pump reservoir tank 14 adjacent thereto.
  • the two basins 1 and 14 are connected by flow connections in the form of a lower and an upper overflow 15a and 15b with each other.
  • the refrigerator 20 e.g. after austenitizing, the hot slabs / sheets 2 on a coming from a heating oven hearth carriage 16 lying positioned via a transfer stage 17 supplied.
  • a hydraulically actuated tilting device 18 By means of a hydraulically actuated tilting device 18, the hot slab / sheet 2 is lifted from the bogie 16 and erect in upright position one handed over in the cooling basin 1 and lowered carriage 3.
  • the front, right cooling or quenching tank 1 associated tilting device 18 has a rotatably mounted shaft 19, are mounted on the Abhebearme 21, which are located to take over the slab / sheet 2 in a horizontal position and with the resting slab / sheet 2 of the bogie 16 are traversable.
  • the lift arms 21 are moved by hydraulic cylinders 22 from the horizontal position by 90 ° in the transfer position, in which the slab / sheet 2 is upright, rotated or pivoted.
  • the slab / sheet 2 is supported on the lower edge of pawls 23, which can be acted upon by hydraulic cylinders 24.
  • the position detection is carried out via a position sensor, not shown, wherein the raising of the supplied slabs / sheets 2 is carried out after manual release in automatic sequence.
  • the carriage 3 is raised slightly, whereby the slab / sheet 2 is released from the pawls 23, which can thus be pivoted away.
  • the carriage 3 is then lowered very quickly for cooling the slab / sheet 2.
  • the removal of the slab / sheet 2 proceeds in the reverse manner as described above for the setting in the automatic mode.
  • the cooled slab / the sheet 2 is then either against on the bogie 16 or can be transported away with the hall crane, including the transfer crane 17 must be moved laterally in the hall crane Abstransport.
  • the carriage 3 For lifting and lowering the carriage 3 with the slab 2 in the cooling basin 1, the carriage 3 is connected to a cable drive 4, the has guided on the slide 3 cable drums 5 guided and previously on pulleys 6 running ropes 7.
  • a not-shown, frequency-controlled three-phase motor with reduction gear acts mechanically coupled via cardan shafts on the cable drums 5.
  • the carriage 3 runs out with rollers or wheels 8 provided in the cooling tank 1 raceways 9.
  • the lowered completely with the slab 2 in the cooling tank 1 Position of carriage 3 and slab 2 is illustrated in Fig. 3 by dotted lines.
  • the slabs / sheets 2 set as described above are arranged in thedebekken 1 between the raceways 9 with alignment of nozzles 10 on each of the broad side surfaces of the slab / sheet 2 nozzle bars 11a, 11b (see Figures 4 and 5) associated. These are connected to a cooling water circuit 12, as it can be seen closer to Fig. 2.
  • the slab / sheet 2 is irradiated by the nozzle bars 11a, 11b with cooling water.
  • the here maximum, low water level 13a in quenching tank 1 - as well as the adjacent pump reservoir tank 14 - is below the lower edge of the slab / sheet 2 during the cooling process.
  • the cooling water is drawn from the Pumpenvorlagebekken 14 by the pumps 25a, 25b and conveyed through a filter 26 to the nozzle bars 11a, 11b.
  • a speed control for the pumps 25a, 25b allows depending on the sheet size and strength defined exposures to cooling water.
  • the function of the filter 26 is to retain scale particles which are larger than the nozzle openings and thus to avoid blockages. It is rinsed with own medium after each cooling process. The rinse water is guided to a sintering channel 27 and thereby supports the lowering of the water level after the cooling process. The majority of the scale settles on the bottom of the cooling pool 1, so that the pool bottom is cleaned from time to time.
  • the Absenkmenge and amount of fresh water are dependent on the final temperature of the last process and the start temperature of the next cooling program.
  • the basin 1 can be additionally lowered via a bypass 31 (see FIG. 2).
  • the slab / sheet 2 is submerged in the tank 1 filled with high water level 13b and simultaneously charged with water from the cooling beams 11a, 11b.
  • the water is through the nozzles 10 for Forced convection - from a free convection is a forced convection, which allows a better heat transfer from the slab / sheet 2 to the water as a simple dip.
  • a higher cooling start temperature is possible because of the larger storage volume in the whirlpool mode or it can be at low cooling start temperature several cooling down to reach the allowable water temperature limit.
  • cooling in the same cooling system 20 can optionally also be carried out by dive operation without jet irradiation.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Articles (AREA)

Claims (12)

  1. Procédé pour refroidir ou tremper des brames et des tôles (2) avec de l'eau dans un bassin de refroidissement (1, 14), dans lequel les brames et tôles redressées à la verticale au préalable dans un dispositif de basculement (18) sont abaissées et placées temporairement en se trouvant sur chant, caractérisé en ce que les brames et tôles (2) sont aspergées d'eau de refroidissement des deux côtés.
  2. Procédé selon la revendication 1, caractérisé en ce que les brames et tôles (2) sont complètement immergées dans un bassin de refroidissement (1) rempli d'eau et sont en outre aspergées d'eau de refroidissement dans le bain d'eau du bassin de refroidissement (1).
  3. Procédé selon la revendication 1, caractérisé en ce que le niveau d'eau dans le bassin de refroidissement (1, 14) est abaissé, les brames et tôles (2) dépassent du niveau d'eau (13a) et sont aspergées par de l'eau de refroidissement.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le système de refroidissement est basé sur un modèle de refroidissement physico-mathématique, qui décrit le comportement temps-température non stationnaire de la tôle/brame avec les conditions limites des conditions physiques dépendant de la température et le coefficient de transmission de chaleur, qui dépend de la température superficielle locale de la brame/tôle, en calculant, à l'aide de la méthode des éléments finis et l'équation de conductibilité thermique de Fourier ainsi que de la décomposition de la brame/tôle en différentes couches, la répartition de la température sur l'épaisseur du produit à refroidir.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'on règle la pression d'eau et/ou le flux volumique d'aspersion par l'eau de refroidissement.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'on règle la distance entre les dispositifs d'aspersion (10, 11a, 11b) et la surface des brames et tôles (2).
  7. Dispositif pour refroidir ou tremper des brames et des tôles (2) avec de l'eau dans un bassin de refroidissement (1, 14), dans lequel des brames et des tôles (2) redressées à la verticale au préalable par un dispositif de basculement (18) sont abaissées et placées temporairement en se trouvant sur chant, en particulier pour réaliser le procédé selon la revendication 1, caractérisé en ce que le bassin de refroidissement (1) présente des deux côtés des brames/tôles (2) abaissées des dispositifs à gicleur (10, 11a, 11b) orientés vers leurs surfaces larges, qui sont raccordés à un circuit d'eau de refroidissement (12), qui présente des moyens (25a, 25b, 29) pour abaisser le remplissage d'eau à partir d'un niveau d'eau maximal supérieur (13b) vers un niveau d'eau bas inférieur (13a).
  8. Dispositif selon la revendication 7, caractérisé en ce que le bassin de refroidissement (1) est relié hydrauliquement avec un bassin collecteur à pompe (14).
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que le bassin de refroidissement (1) est pourvu de voies de roulement (9) pour un coulisseau (3) pouvant être soulevé et abaissé, destiné à recevoir une brame ou une tôle (2).
  10. Dispositif selon la revendication 9, caractérisé en ce que le coulisseau (3) est raccordé à dispositif de commande à câble (4).
  11. Dispositif selon la revendication 10, caractérisé en ce que le dispositif de commande à câble (4) présente des câbles (7) guidés sur des tambours à câble (5) fixés sur le coulisseau (3) et les tambours à câble (5) sont reliés mécaniquement avec un moteur à courant triphasé régulé en fréquence.
  12. Dispositif selon l'une quelconque des revendications 9 à 11, caractérisé en ce que le coulisseau (3) est guidé au moyen de rouleaux/roues (8) sur les voies de roulement (9).
EP04731341A 2003-05-07 2004-05-06 Procede et dispositif pour refroidir ou tremper des brames et des toles avec de l'eau dans un bassin de refroidissement Expired - Lifetime EP1626822B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10320651 2003-05-07
DE102004023031A DE102004023031A1 (de) 2003-05-07 2004-05-06 Verfahren und Vorrichtung zum Kühlen bzw. Abschrecken von Brammen und Blechen mit Wasser in einem Kühlbecken
PCT/EP2004/004830 WO2004098804A1 (fr) 2003-05-07 2004-05-06 Procede et dispositif pour refroidir ou tremper des brames et des toles avec de l'eau dans un bassin de refroidissement

Publications (2)

Publication Number Publication Date
EP1626822A1 EP1626822A1 (fr) 2006-02-22
EP1626822B1 true EP1626822B1 (fr) 2006-10-25

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EP04731341A Expired - Lifetime EP1626822B1 (fr) 2003-05-07 2004-05-06 Procede et dispositif pour refroidir ou tremper des brames et des toles avec de l'eau dans un bassin de refroidissement

Country Status (9)

Country Link
US (1) US8043086B2 (fr)
EP (1) EP1626822B1 (fr)
AT (1) ATE343438T1 (fr)
BR (1) BRPI0410088A (fr)
CA (1) CA2532719C (fr)
DE (1) DE502004001860D1 (fr)
ES (1) ES2274451T3 (fr)
RU (1) RU2353673C2 (fr)
WO (1) WO2004098804A1 (fr)

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JP5121039B2 (ja) * 2005-01-19 2013-01-16 新日鐵住金株式会社 鋼片の水冷方法
ITMI20111072A1 (it) * 2011-06-14 2012-12-15 Eagle Tech S R L Dispositivo atto a consentire il raffreddamento controllato di billette metalliche da estrudere a caldo e metodo di trattamento relativo.
CN107388694A (zh) * 2017-08-31 2017-11-24 盛红梅 一种工件冷却系统
US11203492B2 (en) * 2019-12-11 2021-12-21 Symbotic Canada, Ulc Case reorientation system and method

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Also Published As

Publication number Publication date
BRPI0410088A (pt) 2006-05-16
DE502004001860D1 (de) 2006-12-07
RU2353673C2 (ru) 2009-04-27
CA2532719A1 (fr) 2004-11-18
WO2004098804A1 (fr) 2004-11-18
ATE343438T1 (de) 2006-11-15
EP1626822A1 (fr) 2006-02-22
RU2005138038A (ru) 2006-05-10
ES2274451T3 (es) 2007-05-16
CA2532719C (fr) 2010-10-19
US20060292513A1 (en) 2006-12-28
US8043086B2 (en) 2011-10-25

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