EP0069618A1 - Verfahren zum Durchlaufkühlen dicker Bleche während des Walzens und Einrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zum Durchlaufkühlen dicker Bleche während des Walzens und Einrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0069618A1
EP0069618A1 EP82401102A EP82401102A EP0069618A1 EP 0069618 A1 EP0069618 A1 EP 0069618A1 EP 82401102 A EP82401102 A EP 82401102A EP 82401102 A EP82401102 A EP 82401102A EP 0069618 A1 EP0069618 A1 EP 0069618A1
Authority
EP
European Patent Office
Prior art keywords
blank
cooling
rolling
rollers
line
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
Application number
EP82401102A
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English (en)
French (fr)
Other versions
EP0069618B1 (de
Inventor
Claude Roger
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.)
USINOR SA
Original Assignee
USINOR SA
Union Siderurgique du Nord et de lEst de France SA USINOR
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Application filed by USINOR SA, Union Siderurgique du Nord et de lEst de France SA USINOR filed Critical USINOR SA
Publication of EP0069618A1 publication Critical patent/EP0069618A1/de
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Publication of EP0069618B1 publication Critical patent/EP0069618B1/de
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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to the cooling of blanks of heavy plate during rolling, as well as to a machine for its implementation.
  • the rolling can thus trade at a high temperature, favorable to certain metallurgical phenomena, such as the dissolution of certain components, also favorable to a rapid and economical transformation by taking advantage of the state of malleability of the metal linked to its temperature.
  • Rolling may continue in one or more other successive phases at decreasing temperatures, each adapted to phenomena such as recrystallization, transformation of the internal structure (thus for steel, part of the rolling may be carried out at a temperature close to that of the austenitic transformation) or the precipitation of various compounds.
  • this cooling is usually obtained in the open air by putting on standby in an annex station provided for this purpose, the blanks during rolling for a time necessary for this cooling or by using a fluid such as water, l air, water vapor, or mixtures thereof, this fluid being sprayed at variable pressures over the entire surface of the blank to be cooled.
  • a disadvantage of these commonly used methods, both for cooling in ambient air and by spraying a fluid, is to cause significant differences in temperature between the different parts of the product and, in particular, this cooling has the effect of further cool the edges and ends of the blanks.
  • the subject of the invention is therefore a method of cooling blanks of heavy, moving sheet metal, during rolling, which consists in cooling the central part of the surface of the blank, excluding the peripheral parts which are formed by the front and rear ends of the product, as well as by its edges.
  • the cooling of said central running part is obtained in particular by spraying a cooling fluid using ramps arranged parallel to the surface of the blank and perpendicular to the running direction of the latter, the projection not being triggered, respectively for each ramp, only after the passage of the front edge of the blank and being stopped before the passage of the rear edge of the blank, in the direction of travel, and the useful projection length of each ramp being adjusted to be less than the dimension of the blank in a direction perpendicular to the travel.
  • Cooling can be obtained by any suitable fluid such as for example water sprayed by a pressurized gas and delivered in the form of a homogeneous two-dimensional sheet from the ramps.
  • This gas can in particular be air.
  • the cooling is carried over the line roller itself of the table to a roll stand rollers.
  • the cooling is carried out laterally to the line of rollers of the rolling table of a rolling stand, by transferring the blank out of this line, in a direction perpendicular to the axis of this line.
  • the cooling station can be placed in the line of the rollers between the rolling stands.
  • the first rolling phase is carried out on the first stand, the blank then passes through the accelerated cooling station, then, after the waiting time necessary to homogenize the temperature sufficiently between the surface and the interior of the blank, is sent to the second stand for the last rolling phase.
  • a cooling station placed laterally to the line of the rolling rollers allows the temperature adjustment operation to be carried out outside the rolling line and to reintegrate the blank in the rolling line at the time necessary for the optimal sequence of operations.
  • the invention also relates to a machine allowing the implementation of the above method, this machine being remarkable in particular in that it comprises means for supporting and guiding the blank, and controlled adjustable cooling means according to the passage of the blank so as to cool the blank only on a central part of its surface, excluding the peripheral parts.
  • the cooling means consist of a set of ramps for spraying a cooling fluid, parallel to each other and to the surface of the blank and arranged perpendicular to the direction of movement of the blank, these ramps being placed above and below the blank and controlled by passage and dimension sensors of the blank.
  • the cooling fluid projection ramps are designed to deliver a jet in the form of a two-dimensional sheet which reaches the blank along the normal to its surface.
  • This sheet is thus for example constituted by a jet of water sprayed by a pressurized gas such as air.
  • An example of such a ramp consists of a hollow body having opposite the surface of the blank an elongated slot with parallel edges.
  • Fig. 1 shows a cooling machine 1 according to the invention disposed laterally to a rolling line 2 comprising a rolling stand 3 in which is engaged a blank 4.
  • the blank 4 is driven on the roller table 5 to a position shown in 4a where it is then removed from the roller table to be directed in a direction perpendicular to the axis of the line of rollers and introduced into the cooling machine 1.
  • the means for transferring the blank 4a in the direction of the machine 1 in order to allow its introduction therein are constituted in the embodiment represented by a set of fine chains 6a, 6b, 6c, 6d, etc. embracing respectively two series of chain wheels 7a, 7b, 7c, etc. and 8a, 8b, etc., which are integral with two shafts 9 and 10 mounted on a frame, not shown, which can be driven in a vertical translational movement represented by the arrow at 11.
  • the chains 6a, 6b, 6c, etc. are inserted between two rollers of the roller table 5 and, when the assembly is raised, lift the blank 4a and drive it, as indicated by the arrow 12, towards the cooling machine 1 where it is introduced.
  • This chain transfer device preferably comprises an operation in two phases, the first carrying out a rapid movement of translation of the blank 4a to evacuate it out of line 2, then the second carrying out a slow movement compatible with the speed d introduction into the machine 1.
  • This cooling machine comprises a series of lines of rollers 13 whose length is greater than the maximum dimension of the blank that is to be cooled.
  • Each line of rollers is spaced for example from 650 to 900 mm, so that there is between them, and at a lower level, lower booms 14 for spraying a cooling fluid, parallel to the lines of rollers 13.
  • Upper ramps 15 for spraying a coolant, parallel to the lines of rollers 13 are arranged in a similar manner but above the line of rollers, so as to be able to spray a coolant on the upper part of the draft.
  • Additional roller lines 16 make it possible to completely release the blank from the ramp area in order to possibly store them, or to homogenize their temperature before reintroduction on the rolling line 2.
  • roller lines 13 are perpendicular to the rollers of the table 5.
  • Rough passage detectors which may for example consist of pairs comprising a light source and a photoelectric cell 17 and 17a, 18 and 18a, 19 and 19a, trigger the operation of the respective respective ramps 14 and 15 as soon as the 'front end of the blank, in the direction of its movement, is passed and stop the operation of these ramps before the passage of the rear end of the blank.
  • the pair of detectors 19, 19a will put the corresponding lower and upper ramps into operation, as soon as the front end is passed, so that the two-dimensional layers of fluid of cooling delivered by the booms reach the surface of the blank only on a part situated below the zones immediately adjacent to the front end, while the pair of detectors 17 and 17a will interrupt the operation of the lower spray booms and corresponding upper, so that the areas adjacent to the rear end of the surface of the blank are not subjected to cooling by the plies of sprayed fluid.
  • the blank passage detectors may be constituted by pressure detectors placed on the same lines of rollers.
  • a time-delay device in order to control the triggering of the spraying of the cooling fluid only from two pairs of passage detectors placed respectively at the inlet. and at the outlet of the cooling machine, taking into account the known speed of movement of the blank.
  • Size blank detectors in a direction perpendicular to the direction of movement of the latter are placed respectively at the front and at the rear of the machine, so as to adjust the total spraying length of the booms 14 and 15 so as not to send the cooling fluid to the lateral edges of the blank 4b during cooling.
  • These dimension detectors can for example also consist of pairs of light source and photoelectric cell 20 and 20a, 21 and 21a, etc., the effective spraying length of the boom being calculated so that it is less than the dimension of the blank measured by these detectors.
  • roller lines are driven in rotation by electric motors, not shown, which make it possible to advance the blank of the rolling line 2 towards the rollers 16 or vice versa.
  • These lines of rollers can be rotated in both directions so that it is possible to subject the blank to a second pass in the cooling machine or to animate the blank 4b while cooling a movement. ' oscillation under the coolant spray booms.
  • the blank 4b is returned to the chain transfer device which takes it up by a movement of translation in the opposite direction.
  • the chain transfer device is then placed in the high position and brings the blank 4b to position 4a, then the chains are lowered to a level below the upper part of the roller table and the blank is again driven in a translational movement to position 4c for subsequent rolling operations.
  • FIG. 2 there is shown in perspective the machine described above in FIG. 1 with its upper 15 and lower 14 spraying ramps which are respectively supplied with cooling fluid by an upper collecting pipe 22 and a lower pipe 23.
  • the lower ramps 14 are disposed between lines of rollers 13 provided with electric drive motors 24.
  • the blank 4b during cooling receives a set of upper 25 and lower 26 coolant curtains on a central part which leaves to discovered a peripheral part constituted by the front and rear ends, as well as by the edges of the 4bo blank
  • FIG. 3 The sprinkling only of the central part of the blank is shown diagrammatically in FIG. 3 on which it can be seen that the surface of the blank subjected to spraying having a small dimension (a) and a large dimension (b), is less than the total surface of the blank whose small dimension is (A) and the large dimension (B).
  • the spraying of the blank according to dimension (a) is obtained by starting and stopping the spraying booms by means of the passage detectors which have been described previously.
  • the spraying according to dimension (b) is obtained by means of the dimension sensors of the blank which obscure part of the total length of the spraying booms so as to be subjected to cooling by water curtains only dimension (b).
  • the invention has been described above with reference to a cooling machine arranged laterally with respect to the rolling line, but it is also possible to place this cooling station in the line of the rollers of the rolling table.
  • cooling ramps are placed above and below the passage of the blank, between the rollers of the rolling roller table.
  • the distance between axes of the rolling rolls is generally between 700 and 1000 mm and thus allows the installation of these spraying booms for a cooling fluid.
  • each roller there is between each roller a set of upper and lower spray booms, the length of these booms being equal to that of the rollers of the roller table.
  • the blank is engaged at constant speed in the group of spray booms, the action of each of these booms being initiated a little after the passage of the front end of the blank and interrupted a little before the passage of the rear end of the blank so as to limit the temperature difference between the ends and the edges, on the one hand, and most of the rest of the blank, on the other hand.
  • the machine works on the same principle when it is arranged laterally or in the line of the rollers of the rolling roller table, the direction of movement of the blank being always perpendicular to the spraying ramps of the coolant.
  • the in-line device in the roller table avoids transferring the blank laterally, but has the disadvantage of increasing the necessary length of the roller table, which leads to correspondingly increasing the length of the rolling line.
  • the choice between the two systems is therefore to be made according to the total investment cost required. In existing installations, the choice is, moreover, conditioned by the equipment in place, in particular the number and location of the rolling stands available.

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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)
  • Metal Rolling (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP82401102A 1981-06-19 1982-06-17 Verfahren zum Durchlaufkühlen dicker Bleche während des Walzens und Einrichtung zur Durchführung des Verfahrens Expired EP0069618B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8112133 1981-06-19
FR8112133A FR2507929A1 (fr) 1981-06-19 1981-06-19 Procede de refroidissement d'ebauches de toles fortes en defilement, en cours de laminage et machine pour sa mise en oeuvre

Publications (2)

Publication Number Publication Date
EP0069618A1 true EP0069618A1 (de) 1983-01-12
EP0069618B1 EP0069618B1 (de) 1985-05-22

Family

ID=9259714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401102A Expired EP0069618B1 (de) 1981-06-19 1982-06-17 Verfahren zum Durchlaufkühlen dicker Bleche während des Walzens und Einrichtung zur Durchführung des Verfahrens

Country Status (6)

Country Link
EP (1) EP0069618B1 (de)
BR (1) BR8203623A (de)
DE (1) DE3263731D1 (de)
ES (1) ES514344A0 (de)
FR (1) FR2507929A1 (de)
MX (1) MX157015A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552780A1 (fr) * 1983-09-29 1985-04-05 Cegedur Procede de refroidissement module minimisant les deformations des produits plats metallurgiques
EP0153688A1 (de) * 1984-02-20 1985-09-04 Nippon Steel Corporation Verfahren zum Abkühlen von heissen Stahlblechen
WO1986005210A1 (fr) * 1985-03-06 1986-09-12 Bertin & Cie Installation de refroidissement par pulverisation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE890804C (de) * 1942-08-25 1953-09-21 Westfalenhuette Dortmund Ag Verfahren und Vorrichtung zum Haerten und Vergueten von Metallbaendern und -blechen
FR1109775A (fr) * 1954-10-06 1956-02-01 Schloemann Ag Installation de transport, notamment pour le transport de bandes minces de la dernière cage d'un train finisseur à un enrouleur
US3396564A (en) * 1965-11-29 1968-08-13 Bethlehem Steel Corp Apparatus for controlled cooling of metal stock
GB2011293A (en) * 1977-12-30 1979-07-11 Usinor Machine for treating sheets of variable width
US4210288A (en) * 1977-02-07 1980-07-01 Davy-Loewy Limited Cooling apparatus
FR2444514A1 (fr) * 1978-12-22 1980-07-18 Heurtey Metallurgie Procede et dispositif de refroidissement pour le traitement des metaux

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1464741A (fr) * 1965-11-15 1967-01-06 Perfectionnements apportés aux douilles, pour contacts électriques à fiches et douilles, et à leurs procédés de fabrication

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE890804C (de) * 1942-08-25 1953-09-21 Westfalenhuette Dortmund Ag Verfahren und Vorrichtung zum Haerten und Vergueten von Metallbaendern und -blechen
FR1109775A (fr) * 1954-10-06 1956-02-01 Schloemann Ag Installation de transport, notamment pour le transport de bandes minces de la dernière cage d'un train finisseur à un enrouleur
US3396564A (en) * 1965-11-29 1968-08-13 Bethlehem Steel Corp Apparatus for controlled cooling of metal stock
US4210288A (en) * 1977-02-07 1980-07-01 Davy-Loewy Limited Cooling apparatus
GB2011293A (en) * 1977-12-30 1979-07-11 Usinor Machine for treating sheets of variable width
FR2444514A1 (fr) * 1978-12-22 1980-07-18 Heurtey Metallurgie Procede et dispositif de refroidissement pour le traitement des metaux

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552780A1 (fr) * 1983-09-29 1985-04-05 Cegedur Procede de refroidissement module minimisant les deformations des produits plats metallurgiques
EP0141761A2 (de) * 1983-09-29 1985-05-15 Cegedur Societe De Transformation De L'aluminium Pechiney Selektives Abschreckverfahren zur Verringerung der Verformungen metallischer Flachprodukte
EP0141761A3 (en) * 1983-09-29 1985-06-12 Cegedur Societe De Transformation De L'aluminium Pechiney Differential quenching process for reducing the deformation of flat metal products
EP0153688A1 (de) * 1984-02-20 1985-09-04 Nippon Steel Corporation Verfahren zum Abkühlen von heissen Stahlblechen
WO1986005210A1 (fr) * 1985-03-06 1986-09-12 Bertin & Cie Installation de refroidissement par pulverisation
FR2578553A1 (fr) * 1985-03-06 1986-09-12 Bertin & Cie Installation de refroidissement par pulverisation

Also Published As

Publication number Publication date
FR2507929A1 (fr) 1982-12-24
DE3263731D1 (en) 1985-06-27
BR8203623A (pt) 1983-06-14
ES8308234A1 (es) 1983-09-01
MX157015A (es) 1988-10-19
EP0069618B1 (de) 1985-05-22
FR2507929B1 (de) 1985-04-26
ES514344A0 (es) 1983-09-01

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