EP0069618B1 - Procédé de refroidissement d'ébauches de tôles fortes en défilement, en cours de laminage et machine pour sa mise en oeuvre - Google Patents

Procédé de refroidissement d'ébauches de tôles fortes en défilement, en cours de laminage et machine pour sa mise en oeuvre Download PDF

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Publication number
EP0069618B1
EP0069618B1 EP82401102A EP82401102A EP0069618B1 EP 0069618 B1 EP0069618 B1 EP 0069618B1 EP 82401102 A EP82401102 A EP 82401102A EP 82401102 A EP82401102 A EP 82401102A EP 0069618 B1 EP0069618 B1 EP 0069618B1
Authority
EP
European Patent Office
Prior art keywords
blank
cooling
rolling
line
rollers
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
Application number
EP82401102A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0069618A1 (fr
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
Union Siderurgique du Nord et de lEst de France SA USINOR
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 Union Siderurgique du Nord et de lEst de France SA USINOR filed Critical Union Siderurgique du Nord et de lEst de France SA USINOR
Publication of EP0069618A1 publication Critical patent/EP0069618A1/fr
Application granted granted Critical
Publication of EP0069618B1 publication Critical patent/EP0069618B1/fr
Expired legal-status Critical Current

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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 post provided for this purpose, the blanks during rolling for a time necessary for this cooling or by using a fluid such as water, 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.
  • document DE-B2-2 235 063 describes a method and a cooling device, applied to different products (hot strips of small thickness), using ramps for spraying a cooling liquid. Means are also provided to be able to adjust the flow rate of the coolant.
  • the ramps project the liquid over the entire width of the sheet and even over a greater width and therefore does not make it possible to remedy the abovementioned drawbacks.
  • the subject of the invention is therefore a process for cooling blanks of heavy plate by running during rolling, in which certain areas of the blank are selectively cooled by spraying a cooling fluid using ramps arranged parallel to the surface of the blank and perpendicular to the direction of travel of the latter, characterized in that it consists in cooling only the central part of the surface of the blank, excluding the peripheral parts, the projection of the cooling fluid consisting of water sprayed by a pressurized gas being triggered respectively for each ramp, only after the passage of the front end of the blank and being stopped before the passage of the end rear 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.
  • the cooling is carried out on the roller line itself of the roller table of a rolling stand.
  • 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 makes it possible to carry out the operation of adjusting the temperature outside the rolling line and to reintegrate the blank in the rolling line at the time necessary for the chaining optimal operations.
  • the invention also relates to a machine allowing the implementation of the above process, comprising means for supporting and guiding the blank, as well as cooling means comprising as a set of ramps for projecting a fluid. cooling, parallel to each other and to the surface of the blank and arranged perpendicular to the direction of movement of the blank, characterized in that the spraying ramps of the coolant consisting of water sprayed by a pressurized gases, placed above and below the blank, can be concealed and controlled by passage and size detector of the blank, depending on the passage of the blank, so as not to cool the blank only on a central part of its surface, excluding peripheral parts.
  • 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 endless chains 6a, 6b, 6c, 6d, etc. embracing respectively two series of chain wheels 7a, 7b, 7c, etc. 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.
  • roller lines 13 are perpendicular to the rollers of the table 5.
  • Rough passage detectors which may for example be made up of pairs comprising a light source and a photocell 17 and 17a, 18 and 18a, 19 and 19a, trigger the operation of the respective respective ramps 14 and 15 from that the front end of the blank, in the direction of its movement, has passed and stop the operation of these ramps before the passage of the rear end of the blank.
  • 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 with a movement d oscillation under the coolant spray booms.
  • the lower ramps 14 are disposed between lines of rollers 13 provided with electric drive motors 24.
  • the preform 4b during cooling receives a set of upper 25 and lower coolant curtains 26 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 blank 4b.
  • 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.
  • 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 only subject the cooling by curtains of water to the 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.
  • 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.

Landscapes

  • 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)
  • Metal Rolling (AREA)
EP82401102A 1981-06-19 1982-06-17 Procédé de refroidissement d'ébauches de tôles fortes en défilement, en cours de laminage et machine pour sa mise en oeuvre Expired EP0069618B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
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
FR8112133 1981-06-19

Publications (2)

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

Family

ID=9259714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401102A Expired EP0069618B1 (fr) 1981-06-19 1982-06-17 Procédé de refroidissement d'ébauches de tôles fortes en défilement, en cours de laminage et machine pour sa mise en oeuvre

Country Status (6)

Country Link
EP (1) EP0069618B1 (enrdf_load_stackoverflow)
BR (1) BR8203623A (enrdf_load_stackoverflow)
DE (1) DE3263731D1 (enrdf_load_stackoverflow)
ES (1) ES8308234A1 (enrdf_load_stackoverflow)
FR (1) FR2507929A1 (enrdf_load_stackoverflow)
MX (1) MX157015A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552780B1 (fr) * 1983-09-29 1988-03-04 Cegedur Procede de refroidissement module minimisant les deformations des produits plats metallurgiques
JPS60174833A (ja) * 1984-02-20 1985-09-09 Nippon Steel Corp 熱鋼板の冷却方法
FR2578553B1 (fr) * 1985-03-06 1989-01-06 Bertin & Cie Installation de refroidissement par pulverisation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2235063B2 (de) * 1971-07-17 1976-05-06 Centro Sperimentale Metallurgico S.P.A., Rom Wasserkuehlvorrichtung fuer warmgewalzte metallbaender

Family Cites Families (7)

* 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
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
US3396564A (en) * 1965-11-29 1968-08-13 Bethlehem Steel Corp Apparatus for controlled cooling of metal stock
GB1595312A (en) * 1977-02-07 1981-08-12 Davy Loewy Ltd Cooling apparatus
FR2413140A1 (fr) * 1977-12-30 1979-07-27 Usinor Machine pour le traitement de toles de largeur variable
FR2444514A1 (fr) * 1978-12-22 1980-07-18 Heurtey Metallurgie Procede et dispositif de refroidissement pour le traitement des metaux

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2235063B2 (de) * 1971-07-17 1976-05-06 Centro Sperimentale Metallurgico S.P.A., Rom Wasserkuehlvorrichtung fuer warmgewalzte metallbaender

Also Published As

Publication number Publication date
FR2507929A1 (fr) 1982-12-24
BR8203623A (pt) 1983-06-14
ES514344A0 (es) 1983-09-01
ES8308234A1 (es) 1983-09-01
EP0069618A1 (fr) 1983-01-12
DE3263731D1 (en) 1985-06-27
MX157015A (es) 1988-10-19
FR2507929B1 (enrdf_load_stackoverflow) 1985-04-26

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