US3604234A - Temperature control system for mill runout table - Google Patents

Temperature control system for mill runout table Download PDF

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US3604234A
US3604234A US825280A US3604234DA US3604234A US 3604234 A US3604234 A US 3604234A US 825280 A US825280 A US 825280A US 3604234D A US3604234D A US 3604234DA US 3604234 A US3604234 A US 3604234A
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sprays
strip
section
temperature
runout table
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Eric N Hinrichsen
Eugene R Turk
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General Electric Co
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General Electric Co
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B21B37/76—Cooling control on the run-out table
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/27—Control of temperature characterised by the use of electric means with sensing element responsive to radiation

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  • Renner ABSTRACT individually controllable water sprays form a strip cooling zone at a runout table between the last stand of a hot strip finishing train and a coiler.
  • the times required for successive sections of the strip to traverse the runout table are calculated from a predetermined strip velocity-time profile.
  • spray patterns of varying lengths are calculated for successive sections. The spray patterns are changed to coincide with the movement of the sections across the runout taple.
  • the present invention relates generally to metal deforming and more particularly to the controlled cooling of a workpiece following a metal-deforming operation.
  • a relatively thick metal workpiece or slab having an initial temperature of approximately 2,200 F. is reduced to a relative thin, elongated metal strip as it passes through a number of mill stands arranged in tandem along a mill table.
  • heat losses caused by radiation, interstand cooling sprays and/or strip-to-roll conduction reduce the strip temperature to l,400 F. -1 ,750 F. depending upon the gage of the strip.
  • the strip Upon leaving the last stand, the strip traverses a runout table on its way to a coiler where it is coiled and the finishing train may be as high as 3,500 feet per minute, water sprays positioned above and below the runout table are usually needed to provide sufficient cooling. The amount and distribution of cooling water delivered by these sprays is con- 1 trolled to regulate the rate of cooling.
  • the water sprays are controlled manually'.
  • An operator observes the temperature of the strip by means of pyrometers located at the last stand in the finishing train and at the coiler. If predetermined temperature variations are observed, the operator tries to manipulate the distribution of cooling sprays to correct the temperature error. Instrument lag and operator response time coupled with the high speeds at which the strip traverses the runout table often keep the operator from altering the spray distribution at the time and place needed to properly correct the temperature deviation.
  • FIG. 1 is a simplified view of a hot strip mill in which the invention finds'use
  • FIG. 2 is a representative velocity-time profile for a strip traversing a runout table
  • FIG. 3 is a graph of the integral of part of the velocity-time profile of FIG. 2 with respect to time;
  • FIG. 4 is a graph of temperature curves used to calculate spray patterns at given workpiece speeds as a function of a desired temperature drop
  • FIG. 5 is a graph showing a family of pattern v. residence time curves
  • FIG. 6 is a representation of successive spray patterns for.
  • FIG. 1 shows, in greatly simplified form, the last stand R, of a roughing train along with other components in a hot strip mill.
  • the final reductions in thickness are taken in the finishing train 22 to produce a metal strip 1,000 ormore feet in length.
  • the strip traverses a cooling or runout table 24 before being wound by a coiler 26. Strip tension during the coiling operation is maintained by a pair of pinch rolls 28 and 30 located at the coiler end of the runout table 24.
  • the strip temperatures at which the coiling operation may be carried out are considerably lower than the strip temperatures at the last stand in the finishing train 22.
  • a number of in dividually controllable cooling sprays, one of which is designated by the numeral 32, are located above and below the runout table 24 to form a cooling zone 36 in which the strip is water-cooled to the proper temperature for coiling.
  • the cooling zone 36 is typically on the order of 300 feet long and is made up of 20 to sprays located above the runout table 24 and approximately the same number located below the runout table 24.
  • the speed of a strip emerging from the finishing train 22 is not constant but may vary as the finishing train 22 is accelerated and decelerated to increase productivity or to maintain a constant finishing train temperature whenever possible while remaining within safe operating limits.
  • the amount of cooling water that is applied to the strip in the cooling zone 36 is adjusted by regulating the number of sprays that are turned on at a particular time. According to a preferred embodiment, the length of the spray pattern is varied while the volume of water delivered by each spray remains constant whenever that spray IS on.
  • the temperature of the strip is monitored by three different pyrometers.
  • the first pyrometer 42 is located at the exit side of the last stand R in the roughing train.
  • the second' pyrometer 44 is located between the penultimate stand F4 and thelast stand F5 in the finishing train 22 whereas the third pyrometer 46 is located at the entry to the coiler 26.
  • the temperature sensed by the pyrometer 42 is one factor in determining the initial spray pattern.
  • the temperature feedbacks from the pyrometers 44 and 46 may be used to modify spray patterns for a strip currently being cooled and to adapt stored data to improve the control of cooling of subsequent strips.
  • the ends of a strip are detected by a metal sensor 48 located above the mill table 20, a load sensor 50 located in stand FI and a thickness gage 52 located between the stand F5 and the cooling zone 36. Detecting the ends of the strip are secondary functions for the load sensor 50 and the thickness gage 52,
  • a first pulse tachometer 54 mechanically coupled to one of the rolls in stand F monitors the velocity of and elapsed distance traveled by the strip as it emerges from the finishing train 22.
  • a second pulse tachometer 56 mechanically coupled to pinch roll 28 may be used to monitor the travel and velocity of the strip after the tail end of the strip leaves the stand F5 so that the pulse tachometer 54 is no longer effective.
  • Outputs from the described sensors are applied to a computer 40 which has an auxiliary input 41 and an output to the sprays in cooling zone 36.
  • the speeds at which the finishing train 22 operates determine the strip velocities until the tail end of the strip leaves stand F5. At that time, strip velocity control passes to the coiler 26. In either situation, the speeds are determined by the properties of the strip according to predetermined relationships which, taken in chronological sequence, establish a velocity-time profile of the type illustrated in FIG. 2.
  • the relationships between the strip properties and the mill speeds are stored in computer 40. Based upon information supplied through the described sensors and through auxiliary input 41, computer 40 establishes the breakpoints and acceleration rates for the profile.
  • computer 40 establishes the breakpoints and acceleration rates for the profile.
  • FIG. 2 when the head end of a strip emerges from finishing train 22 and reaches the runout table 24 at a time t it moves at a lower base speed V equal to the thread speed of the finishing train 22.
  • the thread speed is established as a function of the strip temperature and gage at the entry to the finishing train 22.
  • the strip traverses the runout table 24 at the velocity V L until the head end reaches the coiler 26 at time t,.
  • the finishing train 22 and the coiler 26 are accelerated at a rate established by computer 40 as a function of the finished gage of the strip.
  • the velocity of a sufficiently long strip may exceed an upper base speed V,, at time t and reach a maximum speed V which is set by computer 40 as a function of the entry gage, width, and temperature of the strip to assure, that the mill operates within power and torque limits.
  • the speed V may be set as a fixed percentage of V which will permit temperature readings to be completed at V,, before the strip reaches V Assuming that V is reached at a time t the finishing train 22 operates at that velocity until the tail end of the strip leaves the stand F1 in the finishing train 22 at a time 1 After a delay proportional to strip dimensions and velocity, the finishing train 22 is decelerated at a fixed rate to a velocity V at which it is safe for the tail end of the strip to leave the stand F5. Like the acceleration rate for the strip, the value of velocity V is a function of the final gage of the strip.
  • the tail end of the strip must be moving at the velocity V,, or less as it leaves stand F5 since the sudden release of strip tension at tail end exit velocities greater than V, may cause the strip to whip along the runout table 24.
  • the finishing train 22 has decelerated to the velocity V at a time the strip velocity is held constant until the tail end actually leaves stand F5.
  • the speed of the strip is reduced further starting at a time t to reduce the strip velocity to a safe pickup velocity V, (preferably established by a mill operator) by a time t when the tail end reaches the coiler 26.
  • the length of spray patterns are controlled as functions of (l the time required for strip sections to traverse the runout table (residence times) and (2 the instantaneous location of those sections in the cooling zone 36. Both residence times and locations for the sections may be derived through integration of the strip velocity-time profile with respect to time.
  • FIG. 3 illustrates the integral of the velocity-time profile of FIG. 2 between the times t and t;.
  • the vertical axis of the integral curve represents the elapsed distance traveled by the strip after the head end reaches the runout table at 0 elapsed distance and a base time t
  • the horizontal axis represents the time in seconds for a point on the strip to travel any set distance from the beginning of the runout table.
  • the length of the runout table is represented by a fixed distance L along the elapsed distance axis.
  • the distance L is traveled by the head end of the strip in a residence time t,z,,.
  • the residence time for any other point on the strip is established as the time required (measured horizontally) for, the point to move a distance L (measured vertically) along the integral curve. Assuming that a particular pointreaches the beginning of the runout table at a time t it may be seen from FIG. 3 that it will travel the distance L and thus remain on the runout table until a time t,.
  • each section is located relative to the head end of the strip by pulse tachometer 54 and a suitable digital counter (not shown) once the head end is sensed by thickness gage 52.
  • the number of pulses produced by the pulse tachometer 54 is directly proportional to the elapsed distance traveled by the head end of the strip. Knowing the number of pulses produced by pulse tachometer 54 per foot of strip movement and the distance in feet between a particular section and the head end, the section can be identified as being at the beginning of the runout table when the accumulated count equals the product of the two.
  • the pulse tachometer 54 produces 2 pulses per foot of strip movement and a section is known to be 300 feet behind the head end of the strip, that section is identified as being at stand F5 when the accumulated count equals 2 pulses/foot X 300 feet or 600 pulses.
  • the time in seconds required for a section to reach any point on the runout table after leaving the stand F5 may also be established using the integral curve of FIG. 3.
  • the elapsed distance traveled by the strip head end is known from the accumulated count, thus fixing the head end location on the integral curve.
  • the time required for the element to move a known elapsed distance D to a particular point or spray S on the runout table is seen to be equal to t,t,-.
  • residence times are calculated for contiguous, equally long sections of a strip.
  • the pulses which tachometer 54 begins to generate are applied to a preset countdown counter (not shown) having an initial count equivalent to the section length. Movement of the strip across the runout table causes the counter to count down to zero repeatedly.
  • Conventional circuits are used to generate a sampling pulse whenever a zero count is detected and to reset the counter to its preset condition. Each sampling pulse initiates a residence time calculation.
  • curve 58 represents a range of finishing mill temperatures and curve 60 represents a range of coiling temperatures would be valid only for a particular type of steel having a gage within a particular gage range and moving at a particular speed, either the lower or the upper base speed.
  • the intercepts of the temperature levels T, and T, with the curves 58 and 60 respectively from one of a family of curves are established.
  • the T -curve 58 intercept fixes a first number of sprays N1.
  • the T -curve 60 intercept fixes a second number of sprays N2.
  • the total number of sprays or 1 spray pattern needed to reduce the temperature from T, to T is established as the difference between N1 and N1.
  • the number of sprays N L needed to bring about the specified temperature drop at the lower base speed V establishes a minimum of sprays.
  • the number of sprays N needed to bring about the same temperature drop at the upper base speed V is calculated in the same manner. However, since the upper base speed V is made less than the maximum speed V to permit feedback of temperature data before mill slowdown is initiated, additional calculations are needed to determine the maximum number of sprays which might be needed. Since V is a fixed percentage of V,,,,,, the fixed ratio V lv serves as a multiplier which, when taken times N yields the maximum number of sprays N needed at velocity V,,,,,,,,.
  • the number of sprays N, and N expressed as functions of residence times form the end points for a curve which expresses the number of sprays required for sections having intermediate residence times.
  • the curve may be linear, concave, or convex depending upon the characteristics and dimensions of the strip being cooled.
  • the number of sprays N, needed for a strip having a residence time t may be determined as the mathematical solution to the equation where N, number of sprays for an element traversing the runout table in a residence time 1,; N, number of sprays for an element traversing the runout table at the lower base speed; N, number of sprays for an element traversing the runout table at the upper base speed;
  • each section of the strip is subjected to the required numberof sprays.
  • the sprays are controlled in sequence to track the section across the runout table. This is illustrated in FIG. 6 for two successive sections of the same strip.
  • the strip velocities and temperatures are at levels which require a pattern length of 10 sprays for the first sectionand ll sprays for the second section.
  • each section is considered to be 60 feet long, spanning (for typical spray spacing) l0 sprays.
  • the end sprays in the spray pattern which exists at a particular time are represented by a short vertical bar for the spray patterns for the first section and by a small circle for the spray patterns for the second section. Sprays located directly beneath these end point symbols or beneath the horizontal linesjoining the symbols are to be considered on" or delivering cooling water.
  • the head end of the first section reaches the area beneath spray Slat a time t,,.
  • spray S1 turns on and remains on as the head end passes beyond the area.
  • sprays S2 through S10 are added to the pattern in sequence as the head end of first section reaches and passes beyond each of them.
  • the head end reaches the spray S10.
  • the second section the head end of which corresponds to the tail end of the first section.
  • the spray patterns for this second section are established in the same manner as the spray patterns for the first section. That is, sprays are added to a pattern in sequence to track the head end of the section and are removed in sequence to track the tail end of the section.
  • sprays 81 through S10 are already on when the head end of the second section reaches them, these sprays merely remain on continuously.
  • the required eleventh spray S11 is added just before the head end of the second section reaches it at a time t At that time,
  • the required eleven sprays are on but remain on only until the tail end of the second section passes beyond spray S1.
  • the sprays S1 through S11 are then removed in sequence to track the tail end of the second section across the runout table until all eleven sprays are off again. Although only part of the spray removal sequence for the second section has been shown, it should be understood that the removal sequence does continue until every spray in the pattern at time t,, is off again.
  • the times required for the head and tail ends of a section to reach particular sprays after leaving the last stand are determined from the integral of the velocity-time profile as was described in connection with FIG. 3.
  • the control signals which are used to control values in the spray system are generated in accordance with these required times and in accordance with the known response times of the spray valves. For example, it may be known from the velocity-time integral that the head end of a section takes X seconds to travel from the last stand to a spray to be added to the pattern and that the spray itself requires Y seconds to go from its off to its on state. Consequently, the control signal for that spray would be generated (X-Y) seconds after the head end leaves the last stand. The same type of calculation would be made where the spray is to be turned off. However, the valve turnoff time may not be the same as its turn on time thus making it necessary to use a different quantity for the Y-term when removing sprays than when adding them.
  • the cooling of a strip is described with reference to FIG. 1.
  • the composition, entry gage, width, predicted final gage and temperature of the strip are supplied to computer 40 through auxiliary input 41 and pyrometer 42 before the strip enters the finishing train 22.
  • computer 40 can determine the lower base speed V,,, the acceleration rate, the maximum speed V,,,,,,.,., and the last stand exit speed V,
  • the spray L N and N, required at the lower and upper base speeds are determined from stored data of the type depicted in FIG. 4 using the finishing train temperature and the desired coiling temperature. Since the initial spray pattern is partially a function of finishing train temperature, but must be calculated before the strip reaches the finishing train pyrometer 44, the
  • strip temperature is measured by pyrometer 42 and, based on known thermal conditions, is projected through the finishing train 22 to establish a predicted finishing mill temperature.
  • the desired coiling temperature can be established by means of an operator input through auxiliary input 41. In the alternative, coiling temperatures may be stored in the memory of computer 40 as a function of final gage.
  • the timing of action signals needed to establish the initial spray pattern is not established until the head end is sensed by the load sensor 50 at stand F1 in the finishing train 22. By delaying the calculation of action signals in this manner, timing errors due to unexpected delays between stands R and F1 are avoided.
  • the pulse tachometer 54 begins to monitor both strip velocity and the elapsed distance traveled by the strip head end. Spray pattern and timing calculations are initiated for the remainder of the strip when the head end is sensed by thickness gage 52. As the head end of each succeeding section of the strip is identified at stand F5 by the pulse tachometer 54 acting on the preloaded counter, the residence time of that section is predicted from the extant velocity-time profile. The length of the spray pattern and the timing of the action signals are calculated for the section at stand F5, based on the velocity profile of the strip as it then exists.
  • the tail end of the strip is detected at the first stand Fl of the finishing train 22 by the loss in rolling load monitored by the load sensor 50.
  • the detection of the tail end initiates a mill slowdown procedure which causes the strip to slow to a safe exit velocity by the time the tail end reaches the last stand F5 of the finishing train 22.
  • Final turnoff times for the sprays which have been on for the last strip section are calculated at this same time.
  • the optional pulse tachometer 56 may begin to monitor the strip velocity as the tail end traverses the runout table 24.
  • the present invention is predictive in nature. That is, spray pattern lengths and the timing of action signals are initially predicted as functions of predicted velocities, predicted temperatures, and predicted relationships between spray patterns and their effects on strip temperature. To provide a check on system performance while a strip is being cooled and to refine the predictive approach, adaptive feedbacks are provided by pyrometers 44 and 46.
  • FIG. 7 is similar to FIG. 4 in depicting finishing train temperatures and coiling temperatures versus the number of sprays at a specific constant speed.
  • the number of sprays needed at the constant speed is determined before the strip reaches the runout table by establishing (l a first number of sprays N3 defined by the intercept of the desired coiling temperature T and a coiling temperature curve 74 and (2 a second number of sprays N defined by the intercept of the predicted finishing train temperature T; and a finishing train temperature curve 76.
  • the number of sprays is equal to the difference between N and N If, however, the measured finishing train temperature of a strip section deviates from the predicted finishing train temperature T, by an amount A T, the incremental number of sprays A N to be added or subtracted is determined from the intercept of the measured finishing train temperature (T l-AT) and the finishing train temperature curve 76. Since the shape of the finishing train temperature curve valid at one base speed probably will not be the same as the shape for the other base speed, the term AN may be different for the lower and upper base speeds.
  • FIG. 8 The effect of the section-to-section adaptive process on pattern length calculations is shown in FIG. 8 wherein line 62 represents the originally calculated relationship between the numbers of sprays and the residence times. Assuming that the finishing mill temperature which is measured at any particular section exceeds the predicted temperature, new values for N and N, for that section are calculated by the above-described procedure. The coordinates of the curve are changed at residence times t and mo establish a new curve 64. Assuming that the particular section for which the recalculationsare made has a residence time t, the number of sprays which will be applied to the section are increased from the number N, based on the predicted finishing train temperature (curve 62) to a number N,, based on the measured finishing train temperature (curve 64).
  • the adaptive process is simplified by noting the slope of the finishing train temperature curve 76 at predicted temperature T, when original calculations are made. After that, incremental changes in the number of sprays to account for temperature deviations may be calculated as the product of the temperature deviation and the inverse of the slope.
  • the finishing train temperature curve 76 is linear, which it isnt. However, for temperature deviations on the order of F. or less, curve 76 is sufficiently linear to permit the simplification without introducing significant error. In the unlikely event the actual temperature deviation exceeds 100 F., the noted deviation may be limited to 100 F. during the adaptive calculations.
  • the coiling temperatures at the lower and upper base speeds are monitored by pyrometer 46.
  • the stored coordinates of the appropriate FIG. 4 curve are altered. Referring to FIG. 9, the alteration is effected by shifting the original coiling temperature curve 68 horizontally. If the monitored coiling temperatures exceed the desired coiling temperature, the curve could be shifted to the left to a new position 70, thereby increasing the pattern length from L to L at the particular base speed for which FIG. 9 is valid.
  • the curve could be shifted to the right to a new position 72 reducing the pattern length from L to L
  • Another type of adaptation involves the measured finishing mill temperature and the rate at which the strip is accelerated once it is threaded. It is a known practice to control mill acceleration in accordance with measured finishing mill temperatures. If the strip temperature varies, the mill is accelerated to reduce heat losses or decelerated to increase heat losses to attempt to maintain a constant finishing mill temperature. The acceleration rate needed to maintain a constant temperature for a strip of a particular gage is recorded. The next time a strip of that gage is rolled, the new acceleration rate is used in place of the old.
  • the method of cooling a strip as the strip traverses the runout table at varying velocities comprising the steps of:
  • the method of cooling a strip as the strip traverses the runout table at varying velocities comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
US825280A 1969-05-16 1969-05-16 Temperature control system for mill runout table Expired - Lifetime US3604234A (en)

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US (1) US3604234A (enrdf_load_stackoverflow)
JP (1) JPS5028885B1 (enrdf_load_stackoverflow)
DE (1) DE2023799C3 (enrdf_load_stackoverflow)
FR (1) FR2047828A5 (enrdf_load_stackoverflow)
GB (1) GB1290837A (enrdf_load_stackoverflow)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779054A (en) * 1972-03-02 1973-12-18 Wean United Inc Coolant control for hot strip mill
US3880358A (en) * 1973-08-15 1975-04-29 Edward J Schaming Coolant distribution and control system for metal rolling mills and the like
US3905216A (en) * 1973-12-11 1975-09-16 Gen Electric Strip temperature control system
US4280857A (en) * 1979-11-05 1981-07-28 Aluminum Company Of America Continuous draw anneal system
US4440583A (en) * 1982-01-11 1984-04-03 Nippon Steel Corporation Method of controlled cooling for steel strip
US4497180A (en) * 1984-03-29 1985-02-05 National Steel Corporation Method and apparatus useful in cooling hot strip
US4569023A (en) * 1982-01-19 1986-02-04 Mitsubishi Denki Kabushiki Kaisha Apparatus for controlling the temperature of rods in a continuous rolling mill
US4720310A (en) * 1981-11-26 1988-01-19 Union Siderurgique Du Nord Et De L'est De La France (Usinor) Process for effecting the controlled cooling of metal sheets
US4745786A (en) * 1985-10-14 1988-05-24 Nippon Steel Corporation Hot rolling method and apparatus for hot rolling
US4785646A (en) * 1985-12-28 1988-11-22 Nippon Steel Corporation Method of cooling hot-rolled steel plate
US5235840A (en) * 1991-12-23 1993-08-17 Hot Rolling Consultants, Ltd. Process to control scale growth and minimize roll wear
US5284327A (en) * 1992-04-29 1994-02-08 Aluminum Company Of America Extrusion quenching apparatus and related method
US6220067B1 (en) * 1999-01-21 2001-04-24 Kabushiki Kaisha Toshiba Rolled material temperature control method and rolled material temperature control equipment of delivery side of rolling mill
US6237385B1 (en) * 1999-04-20 2001-05-29 Sms Schloemann-Siemeg Ag Method of cooling a rolled stock and a cooling bed for effecting the method
CN102380514A (zh) * 2011-11-13 2012-03-21 首钢总公司 一种提高热轧钢板控制冷却温度均匀性的方法
CN102596440A (zh) * 2009-11-24 2012-07-18 住友金属工业株式会社 热轧钢板的制造方法和热轧钢板的制造装置
CN102581044A (zh) * 2012-02-10 2012-07-18 山西太钢不锈钢股份有限公司 铁素体不锈钢的特殊冷却方法
EP2465620A4 (en) * 2009-12-16 2012-10-03 Nippon Steel Corp COOLING METHOD OF HOT ROLLED STEEL SHEET
CN105499281A (zh) * 2015-12-07 2016-04-20 武汉钢铁(集团)公司 用于热轧带钢的层流冷却u型控制方法及系统
US20220213570A1 (en) * 2019-04-18 2022-07-07 Sms Group Gmbh Cooling device for seamless steel pipes

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1028535A (en) * 1973-11-15 1978-03-28 Bethlehem Steel Corporation Method for controlling the temperature of steel during hot-rolling on a continuous hot-rolling mill
DE3518925A1 (de) * 1985-05-25 1986-11-27 Kocks Technik Gmbh & Co, 4010 Hilden Verfahren zum kontrollierten stab- und drahtwalzen legierter staehle
DD249202A1 (de) * 1986-05-20 1987-09-02 Thaelmann Schwermaschbau Veb Verfahren zum kuehlen von walzgut in walzbloecken und gerueststaffeln
AT408197B (de) * 1993-05-24 2001-09-25 Voest Alpine Ind Anlagen Verfahren zum stranggiessen eines metallstranges
DE19854675C2 (de) * 1998-11-26 2002-09-26 Thyssenkrupp Stahl Ag Vorrichtung zum Kühlen eines Metallbandes, insbesondere eies Warmbreitbandes
CN102834193B (zh) 2010-07-22 2014-12-17 新日铁住金株式会社 钢板的冷却装置和钢板的冷却方法
AT519995B1 (de) * 2017-05-29 2021-04-15 Andritz Ag Maschf Verfahren zur Regelung der Aufwickeltemperatur eines Metallbandes
DE102019203088A1 (de) 2019-03-06 2020-09-10 Sms Group Gmbh Verfahren zur Herstellung eines metallischen Bandes oder Blechs

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851042A (en) * 1955-10-11 1958-09-09 British Thomson Houston Co Ltd Cooling equipment
US3289449A (en) * 1963-06-04 1966-12-06 United Eng Foundry Co Method and apparatus for cooling strip
US3300198A (en) * 1963-12-27 1967-01-24 Olin Mathieson Apparatus for quenching metal
US3364713A (en) * 1963-08-27 1968-01-23 Yawata Iron & Steel Co Method for controlling operations for the cooling of steel plate in accordance with formulae obtained by theoretical analysis
US3514984A (en) * 1968-01-16 1970-06-02 Westinghouse Electric Corp Apparatus for controlling the flow of a cooling medium onto workpieces
US3533261A (en) * 1967-06-15 1970-10-13 Frans Hollander Method and a device for cooling hot-rolled metal strip on a run-out table after being rolled

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE636442A (enrdf_load_stackoverflow) * 1962-08-24

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851042A (en) * 1955-10-11 1958-09-09 British Thomson Houston Co Ltd Cooling equipment
US3289449A (en) * 1963-06-04 1966-12-06 United Eng Foundry Co Method and apparatus for cooling strip
US3364713A (en) * 1963-08-27 1968-01-23 Yawata Iron & Steel Co Method for controlling operations for the cooling of steel plate in accordance with formulae obtained by theoretical analysis
US3300198A (en) * 1963-12-27 1967-01-24 Olin Mathieson Apparatus for quenching metal
US3533261A (en) * 1967-06-15 1970-10-13 Frans Hollander Method and a device for cooling hot-rolled metal strip on a run-out table after being rolled
US3514984A (en) * 1968-01-16 1970-06-02 Westinghouse Electric Corp Apparatus for controlling the flow of a cooling medium onto workpieces

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779054A (en) * 1972-03-02 1973-12-18 Wean United Inc Coolant control for hot strip mill
US3880358A (en) * 1973-08-15 1975-04-29 Edward J Schaming Coolant distribution and control system for metal rolling mills and the like
US3905216A (en) * 1973-12-11 1975-09-16 Gen Electric Strip temperature control system
US4280857A (en) * 1979-11-05 1981-07-28 Aluminum Company Of America Continuous draw anneal system
US4720310A (en) * 1981-11-26 1988-01-19 Union Siderurgique Du Nord Et De L'est De La France (Usinor) Process for effecting the controlled cooling of metal sheets
US4440583A (en) * 1982-01-11 1984-04-03 Nippon Steel Corporation Method of controlled cooling for steel strip
US4569023A (en) * 1982-01-19 1986-02-04 Mitsubishi Denki Kabushiki Kaisha Apparatus for controlling the temperature of rods in a continuous rolling mill
US4497180A (en) * 1984-03-29 1985-02-05 National Steel Corporation Method and apparatus useful in cooling hot strip
US4745786A (en) * 1985-10-14 1988-05-24 Nippon Steel Corporation Hot rolling method and apparatus for hot rolling
US4785646A (en) * 1985-12-28 1988-11-22 Nippon Steel Corporation Method of cooling hot-rolled steel plate
US5235840A (en) * 1991-12-23 1993-08-17 Hot Rolling Consultants, Ltd. Process to control scale growth and minimize roll wear
US5447583A (en) * 1992-04-29 1995-09-05 Aluminum Company Of America Extrusion quenching apparatus and related method
US5284327A (en) * 1992-04-29 1994-02-08 Aluminum Company Of America Extrusion quenching apparatus and related method
US6220067B1 (en) * 1999-01-21 2001-04-24 Kabushiki Kaisha Toshiba Rolled material temperature control method and rolled material temperature control equipment of delivery side of rolling mill
US6237385B1 (en) * 1999-04-20 2001-05-29 Sms Schloemann-Siemeg Ag Method of cooling a rolled stock and a cooling bed for effecting the method
CN102596440A (zh) * 2009-11-24 2012-07-18 住友金属工业株式会社 热轧钢板的制造方法和热轧钢板的制造装置
CN102596440B (zh) * 2009-11-24 2014-11-05 新日铁住金株式会社 热轧钢板的制造方法和热轧钢板的制造装置
US8359894B2 (en) 2009-12-16 2013-01-29 Nippon Steel Corporation Method for cooling hot-rolled steel strip
EP2465620A4 (en) * 2009-12-16 2012-10-03 Nippon Steel Corp COOLING METHOD OF HOT ROLLED STEEL SHEET
CN102380514A (zh) * 2011-11-13 2012-03-21 首钢总公司 一种提高热轧钢板控制冷却温度均匀性的方法
CN102380514B (zh) * 2011-11-13 2013-05-22 首钢总公司 一种提高热轧钢板控制冷却温度均匀性的方法
CN102581044B (zh) * 2012-02-10 2014-01-22 山西太钢不锈钢股份有限公司 铁素体不锈钢的特殊冷却方法
CN102581044A (zh) * 2012-02-10 2012-07-18 山西太钢不锈钢股份有限公司 铁素体不锈钢的特殊冷却方法
CN105499281A (zh) * 2015-12-07 2016-04-20 武汉钢铁(集团)公司 用于热轧带钢的层流冷却u型控制方法及系统
CN105499281B (zh) * 2015-12-07 2017-12-05 武汉钢铁有限公司 用于热轧带钢的层流冷却u型控制系统
US20220213570A1 (en) * 2019-04-18 2022-07-07 Sms Group Gmbh Cooling device for seamless steel pipes
US11873538B2 (en) * 2019-04-18 2024-01-16 Sms Group Gmbh Cooling device for seamless steel pipes

Also Published As

Publication number Publication date
JPS5028885B1 (enrdf_load_stackoverflow) 1975-09-19
DE2023799A1 (de) 1970-11-19
NL156069B (nl) 1978-03-15
NL7007135A (enrdf_load_stackoverflow) 1970-11-18
DE2023799C3 (de) 1983-11-03
GB1290837A (enrdf_load_stackoverflow) 1972-09-27
DE2023799B2 (de) 1980-01-10
FR2047828A5 (enrdf_load_stackoverflow) 1971-03-12

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