EP0069618B1 - 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 PDFInfo
- 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
Links
- 238000005096 rolling process Methods 0.000 title claims description 56
- 238000001816 cooling Methods 0.000 title claims description 54
- 239000012809 cooling fluid Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 description 19
- 239000002826 coolant Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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)
- Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Claims (6)
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 EP0069618A1 (de) | 1983-01-12 |
EP0069618B1 true 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) |
Families Citing this family (3)
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)
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)
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 |
-
1981
- 1981-06-19 FR FR8112133A patent/FR2507929A1/fr active Granted
-
1982
- 1982-06-17 EP EP82401102A patent/EP0069618B1/de not_active Expired
- 1982-06-17 DE DE8282401102T patent/DE3263731D1/de not_active Expired
- 1982-06-18 MX MX19322882A patent/MX157015A/es unknown
- 1982-06-18 ES ES514344A patent/ES514344A0/es active Granted
- 1982-06-21 BR BR8203623A patent/BR8203623A/pt not_active IP Right Cessation
Patent Citations (1)
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 |
---|---|
DE3263731D1 (en) | 1985-06-27 |
EP0069618A1 (de) | 1983-01-12 |
BR8203623A (pt) | 1983-06-14 |
FR2507929B1 (de) | 1985-04-26 |
MX157015A (es) | 1988-10-19 |
ES8308234A1 (es) | 1983-09-01 |
FR2507929A1 (fr) | 1982-12-24 |
ES514344A0 (es) | 1983-09-01 |
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