EP2111309B1 - Procédé et appareil pour roulement contrôlé thermo-mécaniquement des plaques et bandes métalliques - Google Patents

Procédé et appareil pour roulement contrôlé thermo-mécaniquement des plaques et bandes métalliques Download PDF

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Publication number
EP2111309B1
EP2111309B1 EP08707621A EP08707621A EP2111309B1 EP 2111309 B1 EP2111309 B1 EP 2111309B1 EP 08707621 A EP08707621 A EP 08707621A EP 08707621 A EP08707621 A EP 08707621A EP 2111309 B1 EP2111309 B1 EP 2111309B1
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EP
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Prior art keywords
rolling
phase
phases
duration
sum
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EP08707621A
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German (de)
English (en)
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EP2111309A1 (fr
Inventor
Nick Champion
Michael Trevor Clark
Birger Schmidt
Michael Mick Steeper
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Primetals Asset Management UK Ltd
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Siemens VAI Metals Technologies Ltd
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Priority to PL08707621T priority patent/PL2111309T3/pl
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/004—Transverse moving
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/06—Thermomechanical rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/12—Arrangement or installation of roller tables in relation to a roll stand
    • 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
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates

Definitions

  • the invention relates to the general field of thermo-mechanical controlled rolling of metal slabs to plates or strips in a rolling mill, in particular to a technique known as interleaving and an apparatus for performing that technique.
  • Document GB 139694 A A discloses a method according to the preamble of claim 1.
  • Thermo-mechanical controlled rolling involves the rolling of metal-slabs, plates or strips at specific temperatures in order to achieve specific metallurgical microstructures and mechanical properties. It typically involves two or more rolling phases. Between two successive rolling phases the plates or strips are allowed to cool down during a cooling phase to the specific temperature which is desired for the next rolling phase. For example, when two rolling phases are performed first a number of passes are rolled at a high temperature during the first rolling phase, and then the obtained plate or strip is allowed to cool down to a specific temperature in a cooling phase before the second rolling phase starts. Analogously, in three phase rolling two cooling phases take place, a first one between rolling phase 1 and rolling phase 2, and a second one between rolling phase 2 and rolling phase 3.
  • the interleaving technique is employed. It consists in concurrently processing more than one metal slab, plate or strip in the rolling mill.
  • the interleave depth is a characteristic parameter for thermo-mechanical controlled rolling according to interleaving technique.
  • a special rolling pattern is applied on each slab of the batch to be processed.
  • the rolling pattern is the sequence and duration of all rolling phases and cooling phases which are applied when processing a slab to a plate or strip.
  • Such a rolling pattern comprises at least two rolling phases, and cooling phases between successive rolling phases.
  • interleave depth is defined as the integer number obtained by rounding the smallest value from the group of values consisting of the quotients of the durations of the cooling phases and the duration of the longest rolling phase down to a whole number.
  • interleave depth is defined as the integer number of the obtained by rounding the smallest value from the group of values consisting of the quotients of the durations of the cooling phases and the duration of a rolling phase down to a whole number.
  • the smallest value is 1.95.
  • 1.95 rounded down to a whole number is 1.
  • the interleave depth is 1. If the smallest value is a whole number the integer number defining the interleave depth is equal to that whole number.
  • the interleave depth is defined as the integer number which is the quotient of the duration of the cooling phase and the duration of a rolling phase rounded down to a whole number.
  • FIGs 1- 6 Such a technique is illustrated in Figures 1- 6 for two phase rolling of plates with an interleave depth of two on a simplified plan view of a single stand rolling mill.
  • a first slab to be rolled is heated in the furnace 1 and then discharged onto the roller table 2 and transported to the rolling mill stand 3 where a number of reversing rolling passes are carried out until its rolling phase 1 is completed.
  • the thereby obtained plate 5 is then moved down the roller table 4 to a storage position 6 where plate 5 is stored during its cooling phase.
  • Figure 1 shows plate 5 in storage position 6.
  • Figure 5 illustrates the situation after the penultimate rolling pass of rolling phase 2 of plate 5.
  • Figure 6 illustrates the situation after the last pass of plate 5.
  • a disadvantage of storing plates during their cooling phases on the same roller tables that are used for rolling is the additional length of the roller tables, and of the building housing the roller tables, that is required in comparison to thermo-mechanical rolling without interleaving technique.
  • the interleave depth is two and the roller table 2 on the entry side of the rolling mill stand 3 needs to have at least a length which is equal to twice the length of plates after rolling phase 1 plus the length of a plate after the penultimate pass of rolling phase 2.
  • the roller table 4 on the exit side of the rolling mill stand 3 needs to have a length which is at least equal to the larger one of the two following two values: three times the length of plates after rolling phase 1, length of plates after rolling phase 2.
  • interleave depth can be up to twelve or even more.
  • the roller table on the entry side of a rolling mill stand would need to have at least a length which is equal to twelve times the length of the plates after rolling phase 1 plus the length of the plate on the penultimate pass of rolling phase 2.
  • GB1396946 discloses side-shift roller table sections which can be moved transversely out of the rolling line.
  • a plate is positioned on one of the side-shift roller tables and then moved transversely off-line into a storage position.
  • This transverse movement of the side-shift roller table either brings a cooled plate ready for the next rolling phase into the rolling line or it brings an empty side-shift roller table back into the rolling line. Since the plates are not stored in a row but side by side, the required length of roller tables and building is significantly reduced. However, to cope with an interleave depth of twelve would require twelve side-shifting roller tables which would take up a very large transverse area that would not fit into a standard rolling mill building.
  • Another known solution to the problem of storing large numbers of plates during their cooling phases is to use one or more storing roller tables which run parallel with the mill line roller tables and moving-equipment to move plates between the mill line and the holding line. After rolling phase 1 is finished a moving-equipment moves the plates onto the storing roller tables. When the cooling period is finished the plate is moved back into the mill line for rolling phase 2.
  • a storing roller table parallel to the mill-line roller table would still need to be around 120 metres long.
  • To use two or more storing tables with moving-equipment in order to shorten the required length of each individual additional table would increase the complexity of the equipment and need more transverse space.
  • Figure 7 schematically shows the timing diagram of the rolling pattern of an example of a two phase rolling prior art interleaving method with interleave depth two and equal duration of the rolling phases, the cooling phase being twice as long as a rolling phase, on a rolling mill with one rolling mill stand.
  • a timing diagram depicts the chronological relation of the rolling phases and cooling phases applied on different slabs and the plates or strips derived from these slabs.
  • the processed batch contains 6 slabs which yield plates 1-6.
  • rolling phase 1 starts within a period of time equal to twice the duration of a rolling phase.
  • a period of time which is the sum of the durations of rolling phase 1, of the cooling phase, and of rolling phase 2, elapses until rolling phase 1 of the fourth slab starts.
  • the furnace discharge pattern of Figure 7 consists of three discharges at intervals of the duration of a rolling phase followed by a gap of the duration of four rolling phases during which no slabs are discharged and then another three slab discharges at intervals of the duration of a rolling phase.
  • the furnace discharge pattern would consist of thirteen slab discharges at intervals of the duration of a rolling phase followed by a gap of the duration of fourteen rolling phases.
  • the object of the present invention is to provide a method and an apparatus for thermo-mechanical controlled rolling by interleaving technique which permit the application of a more even furnace discharge pattern and require less space and equipment than the prior art.
  • thermo-mechanical controlled rolling a batch of metal slabs to plates or strips on a rolling mill comprising at least one rolling mill stand according to a rolling pattern comprising at least two rolling phases of at least one rolling pass and cooling phases between successive rolling phases, which rolling pattern is applied on each slab of the batch, characterized in that , during rolling the batch, on at least one rolling mill stand it occurs several times that a rolling phase applied to one slab or plate or strip is succeeded by a different rolling phase applied on another slab or plate or strip, and that for two successively rolled slabs the time gap between the starts of their rolling phases 1 is always smaller than the sum of the duration of all rolling phases and all cooling phases of the rolling pattern.
  • This method permits the application of a furnace discharge pattern that is more even than in the prior art.
  • the time gap between the starts of rolling phases 1 of two consecutively rolled slabs is at least once equal to the sum of the duration of all rolling phases and all cooling phases of the rolling pattern when batches larger than the rolling pattern's interleave depth are processed. Since the time gap between starts of rolling phases 1 for consecutively rolled slabs governs the discharge of slabs from the furnace, a smaller time gap permits a more even furnace discharge pattern.
  • the interleave depth of the method's rolling pattern being defined for rolling patterns with unequal durations of the rolling phases as the integer number obtained by rounding the smallest value from the group of values consisting of the quotients of the durations of the cooling phases and the duration of the longest rolling phase down to a whole number, and for rolling patterns with equal durations of the rolling phases as the integer number obtained by rounding the smallest value from the group of values consisting of the quotients of the durations of the cooling phases and the duration of a rolling phase down to a whole number.
  • the number of rolling phases is two, namely rolling phase 1 and rolling phase 2, which are separated by one cooling phase.
  • thermo-mechanical controlled rolling methods with rolling patterns with an even numbered interleave depth and equal durations of the rolling phases where the duration of the cooling phase is equal to the sum of
  • thermo-mechanical controlled rolling methods with rolling patterns with an even numbered interleave depth and unequal durations of the rolling phases, where the duration of the cooling phase is equal to the sum of
  • thermo-mechanical controlled rolling methods with rolling patterns with an uneven numbered interleave depth and equal durations of the rolling phases, where the duration of the cooling phase is equal to the sum of
  • thermo-mechanical controlled rolling methods with rolling patterns with an uneven numbered interleave depth and unequal durations of the rolling phases, where the duration of the cooling phase is equal to the sum of
  • thermo-mechanical controlled rolling methods with rolling patterns with equal durations of the rolling phases, where the duration of the cooling phase is equal to the sum of
  • the whole number is the integer of the quotient of cooling phase duration and duration of one rolling phase.
  • the whole number is the integer of the quotient of cooling phase duration and duration of the longest rolling phase.
  • thermo-mechanical controlled rolling methods with rolling patterns with unequal durations of the rolling phases and a duration of the cooling phase that is equal to or longer than the sum of the durations of both rolling phases, or a whole number times that sum
  • rolling phase 1 is performed as often as rolling phase 2.
  • the whole number is the integer of the quotient of cooling phase duration and the sum of the durations of both rolling phases, i.e. in mathematical terms
  • thermo-mechanical controlled rolling methods with rolling patterns with unequal durations of the rolling phases and a duration of the cooling phase that is equal to or longer than the sum of
  • the amount of rolling phases 1 performed is equal to the amount of rolling phases 2 performed plus 1 or minus 1.
  • the whole number is the integer of the quotient of cooling phase duration and the sum of the durations of both rolling phases and the duration of either rolling phase 1 or rolling phase 2, i.e. in mathematical terms
  • the number of rolling phases is three, namely rolling phase 1, rolling phase 2 and rolling phase 3, rolling phase 1 and rolling phase 2 being separated by cooling phase 1, and rolling phase 2 and rolling phase 3 being separated by cooling phase 2.
  • thermo-mechanical controlled rolling methods with rolling patterns where the duration of cooling phase 1 is equal to the sum of
  • the maximum time gap between the starts of their rolling phases 1 is up to the sum of the durations of the three rolling phases plus the greater of remainder time 1 and remainder time 2.
  • the whole number A is the integer of the quotient of the duration of cooling phase 1 and the sum of the durations of all three rolling phases
  • the whole number B is the integer of the quotient of the duration of cooling phase 2 and the sum of the durations of all three rolling phases.
  • thermo-mechanical controlled rolling methods with rolling patterns where the duration of cooling phase 1 is equal to the sum of
  • the whole number C is the integer of the quotient of the duration of cooling phase 1 and the sum of the durations of all three rolling phase plus the duration of rolling phase 3
  • the whole number D is the integer of the quotient of the duration of cooling phase 2 and the sum of the durations of all three rolling phases plus the duration of rolling phase 1.
  • thermo-mechanical controlled rolling methods that during rolling the batch, from after completion of rolling the first plate or strip of the batch until the beginning of rolling phase 3 of the last plate or strip of the batch, a rolling phase 1 is always succeeded by a rolling phase 2, and a rolling phase 2 is always succeeded by a rolling phase 3, and a rolling phase 3 is always succeeded by a rolling phase 1.
  • This pattern makes a very even furnace discharge pattern possible.
  • thermo-mechanical controlled rolling methods that during rolling the batch, from after completion of rolling the first plate or strip of the batch until the beginning of rolling phase 3 of the last plate or strip of the batch, a rolling phase 1 is always succeeded by a rolling phase 3, and a rolling phase 3 is always succeeded by a rolling phase 2, and a rolling phase 2 is always succeeded by a rolling phase 1.
  • This pattern makes a very even furnace discharge pattern possible.
  • thermo-mechanical controlled rolling methods that during a period of time equal to the duration of a cooling phase 1 rolling phase 1, rolling phase 2 and rolling phase 3 are performed equally often.
  • rolling phase 2 and rolling phase 3 are performed unequally often. More preferably, during a period of time equal to the duration of a cooling phase 1 the number of rolling phases 3 performed is greater than the number of rolling phases 1 performed and greater than the number of rolling phases 2 performed, and during a period of time equal to the duration of cooling phase 2 the number of rolling phases 1 performed is greater than the number of rolling phases 2 performed and greater than the number of rolling phases 3 performed.
  • the resulting plates or strips are transferred from a rolling line of the rolling mill to a storage position outside the rolling line by at least one moving-equipment, and afterwards are transferred from the storage position to the rolling line after completion of the cooling phase by the moving equipment.
  • the batch during rolling the batch it occurs at least once that while one plate or strip is transferred to its storage position or to the rolling line another plate or strip is simultaneously transferred to the rolling line or to its storage position by the same moving-equipment.
  • an apparatus for thermo-mechanical controlled rolling comprising at least one rolling mill stand, a rolling line, storage positions outside the rolling line, and at least one moving-equipment for moving plates or strips from the rolling line to the storage positions, characterized in that the number of storage positions is half of the interleave depth of the performed rolling pattern rounded up to a whole number.
  • the moving-equipment may be for example a side-shift roller table, lifting roller tables or cranes.
  • the storage positions may be situated for example on one or more side-shift roller tables, lifting roller tables, or storing roller tables which may be parallel to the rolling line. In case of several parallel storing roller tables these may be staggered.
  • At least one moving-equipment can simultaneously transfer one plate or strip to the rolling line or to a storage position and another plate or strip to a storage position or the rolling line.
  • Figure 7 shows two rolling phases and one cooling phase.
  • the sequence of rolling phase 1 and rolling phase 2 is 1-1-1-2-2-2-1-1-1-2-2-2.
  • the time gap between the starts of the rolling phases 1 of two successively rolled slabs is not always smaller than the sum of the duration of all rolling phases and all cooling phases of the rolling pattern.
  • the time gap is equal to the sum of the duration of the two rolling phases and the cooling phase of the rolling pattern.
  • Figure 8 shows a simplified plan view of a rolling mill apparatus for thermo-mechanical controlled rolling with one rolling mill stand 3, a rolling line consisting of the roller tables 2 and 4, a furnace 1 for heating the slabs prior to rolling, and two side-shift roller tables 10 and 11 which are located on the exit side of the rolling mill stand 3 in roller table 4.
  • Each side-shift roller table can moved between two positions.
  • Figure 8 shows the moment when the first slab of the batch to be processed has finished rolling phase 1 and the resulting plate 12 is transported onto side-shift roller table 10 which is in its down position. After that, side-shift roller table 10 is moved into its up position, thereby removing plate 12 from the rolling line and transferring it into its storage position.
  • Figure 9 shows plate 12 in its storage position.
  • side-shift roller table 11 is moved into its up position, thereby removing plate 13 from the rolling line and transferring it into its storage position.
  • Figure 11 shows plate 12 in its storage position.
  • Figure 12 shows plate 14 on side-shift roller table 10 in its up position.
  • side-shift roller table 10 is moved in its down position, thereby removing plate 14 from the rolling line and transferring it into its storage position, and simultaneously transferring plate 12 from its storage position to the rolling line.
  • Figure 13 shows plates 12 and 14 on side-shift roller table 10 in its down position.
  • FIG 14 shows plate 12 after completion of its rolling phase 2.
  • plate 12 clears the rolling mill rolling phase 1 starts for a fourth slab 15, which is also shown in Figure 14 , resulting in plate 16.
  • plate 16 completes phase 1 rolling it is moved to side-shift roller table 11 which is in its up position.
  • Figure 15 shows plate 16 on side-shift roller table 11 in its up position.
  • side-shift roller table 11 is moved in its down position, thereby removing plate 16 from the rolling line and transferring it into its storage position, and simultaneously transferring plate 13 from its storage position to the rolling line.
  • Figure 16 shows plates 13 and 16 on side-shift roller table 11 in its down position. Then, rolling phase 2 begins for plate 13.
  • Figure 17 shows the timing diagram of the rolling pattern described in Figures 8 - 16 .
  • Figure 18 shows the timing diagram of a prior art rolling pattern for an interleave depth of four .
  • Figure 17 shows two rolling phases and one cooling phase.
  • the sequence of rolling phase 1 and rolling phase 2 is 1-1-1-2-1-2-1-2-1-2-2-2. Hence, it occurs 7 times that one type of rolling phase is succeeded by another type of rolling phase.
  • the time gap between the starts of the rolling phases 1 of two successively rolled slabs is always smaller than the sum of the duration of rolling phase 1, rolling phase 2 and the cooling phase of the rolling pattern.
  • Figure 18 shows two rolling phases and one cooling phase.
  • the sequence of rolling phase 1 and rolling phase 2 is 1-1-1-1-1-2-2-2-2-2-1.
  • the time gap between the starts of the rolling phases 1 of two successively rolled slabs is not always smaller than the sum of the duration of all rolling phases and all cooling phases of the rolling pattern.
  • the time gap is equal to the sum of the duration of the two rolling phases and the cooling phase of the rolling pattern.
  • the invention as outlined in Figures 8 - 17 allows a more even furnace discharge pattern, since after the completion, i.e. the end, of a rolling phase 1 of one slab a new slab starts its rolling phase 1 always after a period of time which is equal to the duration of one rolling phase.
  • the furnace discharge pattern can be even, too.
  • the first five rolling phases 1 start one after another without time gap between the end of rolling phase 1 of one slab and the start of rolling phase 1 of the successively rolled slab, followed by a long time gap between start of rolling phase 1 of the fifth slab and start of rolling phase 1 of the sixth slab. That long time gap lasts for a time period which is equal to the sum of the durations of all rolling phases and the cooling phase.
  • the advantage of the present invention is that compared to the prior art it provides a possibility to use more even furnace discharge patterns, to reduce the number of storage positions needed, and to reduce the number of movements of the moving-equipment which transfers plates from the rolling line to storage positions and back.
  • Figures 8 - 17 refer to a two phase rolling pattern on a rolling mill with one mill stand with interleave depth four
  • the abovementioned advantages can also be achieved for rolling patterns with more rolling phases, and for rolling patterns with different interleave depths, and for rolling mills with more than one mill stand.
  • An inventive two phase rolling pattern with an interleave depth of 3 and rolling phases of equal length is illustrated in the timing diagram of Figure 19 .
  • the maximum time gap between starts of successive rolling phases 1 is a time period equal to the duration of three rolling phases, whereas in the interleaving pattern of the prior art for an interleave depth of 3 the maximum time gap would be equal to equal to the duration of five rolling phases.
  • two side shift table would suffice whereas for a prior art rolling pattern three side shift tables would be necessary.
  • Figure 20 shows a prior art timing diagram for a two phase rolling pattern with different durations of the rolling phases and interleave depth 1. In that rolling pattern it takes a period of time equal to eight times the duration of rolling phase 1 to produce 2 plates, and during that time the mill is only rolling for a period of time equal to six times the duration of rolling phase 1.
  • Figure 21 shows a timing diagram for an inventive rolling pattern with the same durations of the rolling phases and the cooling phase, and thereby the same interleave depth, as the prior art rolling pattern of Figure 20 .
  • inventive pattern of Figure 21 after rolling phase 2 of the first plate has been completed, the mill is operating without pause and 1 plate is produced after thrice the duration of rolling phase 1. The throughput is therefore 33% greater than is achieved by the pattern shown in Figure 20 .
  • FIG. 22 and 23 A similar improvement in throughput is illustrated by Figures 22 and 23 for a two phase rolling pattern with interleave depth 3.
  • the duration of the cooling phase is 6 times the duration of rolling phase 1 and the duration of rolling phase 2 is twice the duration of rolling phase 1.
  • the prior art rolling pattern illustrated in Figure 22 four plates are produced in a period of time equal to 15 times the duration of rolling phase 1, and during that time the mill is operating for a period of time equal to 12 times the duration of rolling phase 1.
  • the inventive rolling pattern illustrated in Figure 23 the mill operates continuously after the first two plates and one plate is produced after thrice the duration of rolling phase 1.
  • Figure 24 shows a three phase rolling pattern with equal durations of the rolling phases, different durations of the cooling phases and interleave depth 2.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
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Claims (25)

  1. Procédé de laminage thermomécanique régulé d'un lot de brames métalliques en tôles ou bandes sur un train de laminoir comprenant au moins une cage de laminoir, selon un modèle de laminage comprenant au moins deux phases de laminage d'au moins une passe de laminage et des phases de refroidissement entre des phases de laminage successives, lequel modèle de laminage est appliqué sur chaque brame du lot,
    caractérisé
    en ce que, pendant le laminage du lot, sur au moins une cage de laminoir, il arrive plusieurs fois qu'une phase de laminage appliquée à une brame ou tôle ou bande soit suivie d'une phase de laminage différente appliquée à une autre brame ou tôle ou bande sur ladite cage de laminoir, et
    en ce que, pour deux brames laminées successivement, l'intervalle de temps entre les débuts de leurs phases de laminage 1 est toujours inférieur à la somme de la durée de toutes les phases de laminage et de toutes les phases de refroidissement du modèle de laminage.
  2. Procédé selon la revendication 1, caractérisé en ce que, après que la première phase de laminage de la première brame du lot a été achevée et jusqu'au début de la dernière phase de laminage de la dernière tôle ou bande, il y a toujours au moins une autre tôle ou bande dans sa phase de refroidissement.
  3. Procédé selon la revendication 1 ou 2, la profondeur d'entrelacement du modèle de laminage selon le procédé étant définie,
    pour des motifs de laminage à durées inégales des phases de laminage, comme le nombre entier obtenu en arrondissant la plus petite valeur du groupe de valeurs consistant en les quotients des durées des phases de refroidissement et de la durée de la plus longue phase de laminage, à un nombre entier inférieur, et,
    pour des motifs de laminage à durées égales des phases de laminage, comme le nombre entier obtenu en arrondissant la plus petite valeur du groupe de valeurs consistant en les quotients des durées des phases de refroidissement et de la durée d'une phase de laminage, à un nombre entier inférieur, caractérisé
    en ce que, pour les lots plus grands que la profondeur d'entrelacement plus un, après que la première phase de laminage de la première brame du lot a été achevée et jusqu'au début de la dernière phase de laminage de la dernière tôle ou bande, il y a toujours au moins une autre tôle ou bande dans sa phase de refroidissement.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé
    en ce que le nombre de phases de laminage est de deux, en l'occurrence la phase de laminage 1 et la phase de laminage 2, lesquelles sont séparées par une phase de refroidissement.
  5. Procédé selon la revendication 4, caractérisé en ce que, pour des motifs de laminage à profondeur d'entrelacement de nombre pair et à durées égales des phases de laminage,
    la durée de la phase de refroidissement étant égale à la somme :
    - d'un nombre entier fois la durée d'une phase de laminage et
    - d'un temps restant,
    pour des brames laminées successivement, l'intervalle de temps maximal entre les débuts de leurs phases de laminage 1 est inférieur ou égal à la somme de deux fois la durée d'une phase de laminage et du temps restant.
  6. Procédé selon la revendication 4, caractérisé en ce que, pour des motifs de laminage à profondeur d'entrelacement de nombre pair et à durées inégales des phases de laminage,
    la durée de la phase de refroidissement étant égale à la somme :
    - d'un nombre entier fois la durée de la plus longue phase de laminage et
    - d'un temps restant,
    pour des brames laminées successivement, l'intervalle de temps maximal entre les débuts de leurs phases de laminage 1 est inférieur ou égal à la somme de deux fois la durée de la plus longue phase de laminage et du temps restant.
  7. Procédé selon la revendication 4, caractérisé en ce que, pour des motifs de laminage à profondeur d'entrelacement de nombre impair et à durées égales des phases de laminage,
    la durée de la phase de refroidissement étant égale à la somme :
    - d'un nombre entier fois la durée d'une phase de laminage et
    - d'un temps restant,
    pour des brames laminées successivement, l'intervalle de temps maximal entre les débuts de leurs phases de laminage 1 est inférieur ou égal à la somme de trois fois la durée d'une phase de laminage et du temps restant.
  8. Procédé selon la revendication 4, caractérisé en ce que, pour des motifs de laminage à profondeur d'entrelacement de nombre impair et à durées inégales des phases de laminage,
    la durée de la phase de refroidissement étant égale à la somme :
    - d'un nombre entier fois la durée de la plus longue phase de laminage et
    - d'un temps restant,
    pour des brames laminées successivement, l'intervalle de temps maximal entre les débuts de leurs phases de laminage 1 est inférieur ou égal à la somme de trois fois la durée de la plus longue phase de laminage et du temps restant.
  9. Procédé selon l'une quelconque des revendications 4, 5 ou 7, caractérisé
    en ce que, après l'achèvement du laminage de la première tôle ou bande du lot,
    pour des motifs de laminage à durées égales des phases de laminage,
    la durée de la phase de refroidissement étant égale à la somme :
    - d'un nombre entier fois la durée d'une phase de laminage et
    - d'un temps restant,
    la phase de laminage 1 alterne avec la phase de laminage 2 pendant le laminage du lot suivant un intervalle qui est inférieur ou égal à la somme de la profondeur d'entrelacement fois la durée d'une phase de laminage et du temps restant.
  10. Procédé selon l'une quelconque des revendications 4, 6 et 8, caractérisé
    en ce que, après l'achèvement du laminage de la première tôle ou bande du lot,
    pour des motifs de laminage à durées inégales des phases de laminage,
    la durée de la phase de refroidissement étant égale à la somme :
    - d'un nombre entier fois la durée de la plus longue phase de laminage et
    - d'un temps restant,
    la phase de laminage 1 alterne avec la phase de laminage 2 pendant le laminage du lot suivant un intervalle qui est inférieur ou égal à la somme de la profondeur d'entrelacement fois la durée de la plus longue phase de laminage et du temps restant.
  11. Procédé selon l'une quelconque des revendications 4, 6, 8 et 10, caractérisé
    en ce que, pour des motifs de laminage à durées inégales des phases de laminage et à durée de phase de refroidissement égale ou supérieure à la somme des durées des deux phases de laminage, ou à un nombre entier fois cette somme,
    après l'achèvement du laminage de la première tôle ou bande du lot,
    pendant un laps de temps égal à la durée de la phase de refroidissement,
    la phase de laminage 1 est exécutée aussi souvent que la phase de laminage 2.
  12. Procédé selon l'une quelconque des revendications 4, 6, 8 et 10, caractérisé
    en ce que, pour des motifs de laminage à durées inégales des phases de laminage et à durée de phase de refroidissement égale ou supérieure à la somme :
    - des durées des deux phases de laminage,
    - et de la durée soit de la phase de laminage 1, soit de la phase de laminage 2,
    ou à un nombre entier fois cette somme,
    pendant la durée de la phase de refroidissement, la quantité de phases de laminage 1 exécutées est égale à la quantité de phases de laminage 2 exécutées plus 1 ou moins 1.
  13. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé
    en ce que le nombre de phases de laminage est de trois, en l'occurrence une phase de laminage 1, une phase de laminage 2 et une phase de laminage 3, la phase de laminage 1 et la phase de laminage 2 étant séparées par une phase de refroidissement 1 et la phase de laminage 2 et la phase de laminage 3 étant séparées par une phase de refroidissement 2.
  14. Procédé selon la revendication 13, caractérisé en ce que, pour des motifs de laminage où la durée de la phase de refroidissement 1 est égale à la somme :
    - d'un nombre entier A fois la somme des durées des trois phases de laminage, et
    - d'un temps restant 1,
    et où la durée de la phase de refroidissement 2 est égale à la somme :
    - d'un nombre entier B fois la somme des durées des trois phases de laminage, et
    - d'un temps restant 2,
    pour des brames laminées successivement, l'intervalle de temps maximal entre les débuts de leurs phases de laminage 1 est inférieur ou égal à la somme des durées des trois phases de laminage plus le plus grand des temps restants 1 et 2.
  15. Procédé selon la revendication 13, caractérisé en ce que,
    pour des motifs de laminage où la durée de la phase de refroidissement 1 est égale à la somme :
    - d'un nombre entier C fois la somme des durées des trois phases de laminage et de la durée de la phase de laminage 3,
    et
    - d'un temps restant 3,
    et où la durée de la phase de refroidissement 2 est égale à la somme :
    - d'un nombre entier D fois la somme des durées des trois phases de laminage et de la durée de la phase de laminage 1,
    et
    - d'un temps restant 4,
    pour des brames laminées successivement, l'intervalle de temps maximal entre les débuts de leurs phases de laminage 1 est inférieur ou égal à la somme des durées des trois phases de laminage plus le plus grand des temps restants 3 et 4.
  16. Procédé selon l'une quelconque des revendications 13 à 14, caractérisé en ce que, pendant le laminage du lot,
    depuis après l'achèvement du laminage de la première tôle ou bande du lot jusqu'au début de la phase de laminage 3 de la dernière tôle ou bande du lot,
    une phase de laminage 1 est toujours suivie d'une phase de laminage 2, une phase de laminage 2 est toujours suivie d'une phase de laminage 3 et une phase de laminage 3 est toujours suivie d'une phase de laminage 1.
  17. Procédé selon la revendication 13 ou 15, caractérisé en ce que, pendant le laminage du lot,
    depuis après l'achèvement du laminage de la première tôle ou bande du lot jusqu'au début de la phase de laminage 3 de la dernière tôle ou bande du lot,
    une phase de laminage 1 est toujours suivie d'une phase de laminage 3, une phase de laminage 3 est toujours suivie d'une phase de laminage 2 et une phase de laminage 2 est toujours suivie d'une phase de laminage 1.
  18. Procédé selon la revendication 14 ou 16, caractérisé en ce que, pendant un laps de temps égal à la durée d'une phase de refroidissement 1,
    la phase de laminage 1, la phase de laminage 2 et la phase de laminage 3 sont exécutées aussi souvent l'une que l'autre.
  19. Procédé selon l'une quelconque des revendications 15 ou 17, caractérisé
    en ce que, pendant un laps de temps égal à la durée d'une phase de refroidissement 1,
    la phase de laminage 1, la phase de laminage 2 et la phase de laminage 3 ne sont pas exécutées aussi souvent l'une que l'autre.
  20. Procédé selon la revendication 19, caractérisé en ce que, pendant un laps de temps égal à la durée d'une phase de refroidissement 1, le nombre de phases de laminage 3 exécutées est plus grand que le nombre de phases de laminage 1 exécutées et plus grand que le nombre de phases de laminage 2 exécutées, et
    en ce que, pendant un laps de temps égal à la durée de la phase de refroidissement 2, le nombre de phases de laminage 1 exécutées est plus grand que le nombre de phases de laminage 2 exécutées et plus grand que le nombre de phases de laminage 3 exécutées.
  21. Procédé selon l'une quelconque des revendications 1 à 20, caractérisé
    en ce que, après l'achèvement d'une phase de laminage qui est suivie d'une phase de refroidissement, les tôles ou bandes résultantes sont transférées d'une ligne de laminage du train de laminoir à une position de stockage à l'extérieur de la ligne de laminage par au moins un équipement mobile, après quoi elles sont transférées de la position de stockage à la ligne de laminage par l'équipement mobile après l'achèvement de la phase de refroidissement.
  22. Procédé selon la revendication 21, caractérisé en ce que, pendant le laminage du lot, il arrive au moins une fois que, pendant qu'une tôle ou bande est transférée jusqu'à sa position de stockage ou jusqu'à la ligne de laminage, une autre tôle ou bande soit transférée simultanément jusqu'à la ligne de laminage ou jusqu'à sa position de stockage par le même équipement mobile.
  23. Appareil de laminage thermomécanique régulé conforme à un procédé selon les revendications 1 à 22,
    comprenant au moins une cage de laminoir (3), une ligne de laminage, des positions de stockage (6, 8) à l'extérieur de la ligne de laminage et au moins un équipement mobile pour déplacer les tôles ou les bandes de la ligne de laminage jusqu'aux positions de stockage (6, 8),
    la profondeur d'entrelacement du modèle de laminage selon le procédé étant définie,
    pour des motifs de laminage à durées inégales des phases de laminage, comme le nombre entier obtenu en arrondissant la plus petite valeur du groupe de valeurs consistant en les quotients des durées des phases de refroidissement et de la durée de la plus longue phase de laminage, à un nombre entier inférieur, et,
    pour des motifs de laminage à durées égales des phases de laminage, comme le nombre entier obtenu en arrondissant la plus petite valeur du groupe de valeurs consistant en les quotients des durées des phases de refroidissement et de la durée d'une phase de laminage, à un nombre entier inférieur, caractérisé
    en ce que le nombre de positions de stockage (6, 8) est égal à la moitié de la profondeur d'entrelacement du modèle de laminage exécuté arrondi à un nombre entier supérieur.
  24. Appareil selon la revendication 23, caractérisé en ce qu'au moins un équipement mobile peut transférer simultanément une tôle ou bande jusqu'à la ligne de laminage ou jusqu'à une position de stockage (6, 8) et une autre tôle ou bande jusqu'à une position de stockage (6, 8) ou jusqu'à la ligne de laminage.
  25. Utilisation d'un procédé selon l'une quelconque des revendications 1-22 pour le laminage thermomécanique régulé d'un lot de brames métalliques en tôles ou bandes sur un train de laminoir comprenant au moins une cage de laminoir.
EP08707621A 2007-02-16 2008-02-08 Procédé et appareil pour roulement contrôlé thermo-mécaniquement des plaques et bandes métalliques Revoked EP2111309B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08707621A EP2111309B1 (fr) 2007-02-16 2008-02-08 Procédé et appareil pour roulement contrôlé thermo-mécaniquement des plaques et bandes métalliques
PL08707621T PL2111309T3 (pl) 2007-02-16 2008-02-08 Sposób oraz urządzenie do termomechanicznego, kontrolowanego walcowania metalowych płyt oraz taśm

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07270012A EP1958711A1 (fr) 2007-02-16 2007-02-16 Procédé et appareil pour roulement contrôlé thermo-mécaniquement des plaques et bandes métalliques
EP08707621A EP2111309B1 (fr) 2007-02-16 2008-02-08 Procédé et appareil pour roulement contrôlé thermo-mécaniquement des plaques et bandes métalliques
PCT/EP2008/000976 WO2008098709A1 (fr) 2007-02-16 2008-02-08 Procédé et appareil de laminage thermomécanique contrôlé de brames et de bandes métalliques

Publications (2)

Publication Number Publication Date
EP2111309A1 EP2111309A1 (fr) 2009-10-28
EP2111309B1 true EP2111309B1 (fr) 2011-11-16

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EP07270012A Withdrawn EP1958711A1 (fr) 2007-02-16 2007-02-16 Procédé et appareil pour roulement contrôlé thermo-mécaniquement des plaques et bandes métalliques
EP08707621A Revoked EP2111309B1 (fr) 2007-02-16 2008-02-08 Procédé et appareil pour roulement contrôlé thermo-mécaniquement des plaques et bandes métalliques

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US (1) US20100077823A1 (fr)
EP (2) EP1958711A1 (fr)
JP (1) JP2010517787A (fr)
KR (1) KR101178348B1 (fr)
AT (1) ATE533573T1 (fr)
BR (1) BRPI0807923A2 (fr)
DK (1) DK2111309T3 (fr)
PL (1) PL2111309T3 (fr)
RU (1) RU2434699C2 (fr)
WO (1) WO2008098709A1 (fr)

Cited By (1)

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WO2013160162A1 (fr) 2012-04-26 2013-10-31 Siemens Aktiengesellschaft Laminage thermomécanique d'une plaque d'aluminium

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CN104718170A (zh) 2012-09-04 2015-06-17 Ocv智识资本有限责任公司 碳强化的增强纤维在含水或非水介质内的分散
AT514079B1 (de) 2013-05-21 2014-10-15 Siemens Vai Metals Tech Gmbh Verfahren und Vorrichtung zum schnellen Ausfördern von Grobblechen aus einem Walzwerk
ITUD20130127A1 (it) * 2013-10-04 2015-04-05 Danieli Off Mecc Impianto siderurgico per la produzione di prodotti metallici lunghi e relativo metodo di produzione
CN112387791B (zh) * 2020-12-03 2022-11-18 北京首钢自动化信息技术有限公司 冷轧带钢的轧制温度确定方法及确定系统
CN115090669A (zh) * 2022-05-07 2022-09-23 江苏沙钢集团淮钢特钢股份有限公司 高效棒材控轧方法

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WO2013160162A1 (fr) 2012-04-26 2013-10-31 Siemens Aktiengesellschaft Laminage thermomécanique d'une plaque d'aluminium
US10131979B2 (en) 2012-04-26 2018-11-20 Primetals Technologies Germany Gmbh Thermomechanical rolling of an aluminum plate

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Publication number Publication date
BRPI0807923A2 (pt) 2014-06-24
RU2434699C2 (ru) 2011-11-27
EP2111309A1 (fr) 2009-10-28
KR101178348B1 (ko) 2012-08-29
PL2111309T3 (pl) 2012-03-30
ATE533573T1 (de) 2011-12-15
JP2010517787A (ja) 2010-05-27
WO2008098709A1 (fr) 2008-08-21
US20100077823A1 (en) 2010-04-01
RU2009134523A (ru) 2011-03-27
DK2111309T3 (da) 2012-03-05
EP1958711A1 (fr) 2008-08-20
KR20090111348A (ko) 2009-10-26

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