WO2019124241A1 - 厚鋼板の冷却装置および冷却方法ならびに厚鋼板の製造設備および製造方法 - Google Patents
厚鋼板の冷却装置および冷却方法ならびに厚鋼板の製造設備および製造方法 Download PDFInfo
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- WO2019124241A1 WO2019124241A1 PCT/JP2018/046067 JP2018046067W WO2019124241A1 WO 2019124241 A1 WO2019124241 A1 WO 2019124241A1 JP 2018046067 W JP2018046067 W JP 2018046067W WO 2019124241 A1 WO2019124241 A1 WO 2019124241A1
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- spray nozzle
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- 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
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- 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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
-
- 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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
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- 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
- C21D9/5735—Details
- C21D9/5737—Rolls; Drums; Roll arrangements
-
- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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- 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
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Definitions
- the present invention when cooling steel plates cooled to room temperature after controlled cooling or hot rolling after hot rolling in a production line for thick steel plates, is controlled from the conventional cooling rate while controlling the shape.
- the invention also relates to a cooling device and a cooling method which make it possible to adjust in a wide range. Further, the present invention relates to a manufacturing facility of a thick steel plate using this cooling device and a method of manufacturing a thick steel plate using this cooling method.
- this is a method of obtaining a composite structure such as ferrite + bainite or ferrite + martensite by setting the condition of relatively slow cooling rate at the early or late stage of cooling.
- This composite organization can lower the yield ratio, which is, for example, the ratio of the yield strength to the tensile strength, and there is a possibility that a steel plate or the like excellent in earthquake resistance can be manufactured.
- Patent Document 1 discloses a technique for arranging a spray nozzle installed in a water tank and a water tank and changing the liquid level of the water tank to widely change the cooling capacity with respect to the cooling header on the lower surface.
- the liquid level of the water tank is raised, the nozzle tip is submerged, and the water in the water tank is associated with the spray water by adding to the cooling water of the spray. It is possible to allow the steel plate to be flooded with an amount of water greater than the injection flow rate. Also, when lowering the cooling capacity, lower the liquid level in the water tank so that the tip of the spray nozzle is not submerged, and a small amount of water can be applied to the steel plate by not generating the accompanying flow described above. Can.
- Patent document 2 is a technique which adjusts a flow volume by supplying water from an independent system
- group the nozzle adjacent to a plurality of nozzles attached in the width direction
- the adjustment amount of the flow rate can only be adjusted about 50% with respect to the maximum cooling rate.
- the rapid cooling device and the slow cooling device provided with the rod-like cooling water nozzle from which the characteristic of a flow differs are arranged back and front, and the rapid cooling device is one cooling area.
- the technique which adjusts a cooling rate in a wide range by switching and injecting a slow cooling device is described.
- roller quench In cooling of thick steel plates, particularly in off-line heat treatment, so-called roller quench is often employed in which steel plates are passed while being restricted by rolls and cooled. This type is widely used because the steel sheet is cooled while being restrained by rolls, so that the flatness of the steel sheet after cooling is good and the shape correction processing thereafter can be reduced.
- roller quenching uses rolls with relatively large diameter and restrains the steel plate with narrow roll pitch in order to improve the cooling shape, it secures a large space for the cooling device installed between the rolls I can not do it. Therefore, it is difficult to apply the technology of Patent Document 3 to a roller quench type cooling device.
- the present invention has been made in view of the above circumstances, and in cooling the thick steel plate, the cooling rate can be adjusted in a wide range by adjusting the amount of cooling water in a wide range while controlling the shape. It is an object of the present invention to provide a cooling device and a cooling method effective for a narrow cooling space in a roller quench type cooling device in which a cooling device is installed between rolls for restraining thick steel plates. Moreover, this invention aims at providing the manufacturing equipment of the thick steel plate using this cooling device, and the manufacturing method of the thick steel plate using this cooling method.
- the present inventors control the shape of the steel plate by setting the ratio P / D of the constraining roll pitch P to the constraining roll diameter D within a predetermined range, and use cooling spray nozzles having different flow density. It has been found that the cooling rate can be adjusted over a wide range.
- the gist of the present invention is as follows. [1] In a cooling device in which a plurality of constraining rolls are installed in the steel plate conveyance direction, and a plurality of cooling headers are disposed between the constraining rolls, The ratio P / D between the constraining roll pitch P and the constraining roll diameter D is set to 2.5 or less, Each cooling header is connected to one of two or more cooling water supply systems, Each cooling water supply system is equipped with a control valve so that water supply on / off and flow control can be performed independently.
- Each cooling header has a plurality of cooling spray nozzles attached in the width direction of the steel plate,
- the cooling spray nozzles adjacent in the steel plate width direction are connected to cooling headers of different cooling water supply systems, and
- the flow density of the cooling water injected from the cooling spray nozzles adjacent to the steel plate in the width direction is different flow density, and from the cooling spray nozzle which sprays the cooling water with the maximum flow density for the same injection pressure, It is possible to inject three times more flow density of cooling water from the cooling spray nozzle that injects the flow density of cooling water,
- a cooling system for thick steel plate comprising a control mechanism that controls each cooling water supply system individually and controls it using a control valve so as to inject cooling water from a cooling spray nozzle.
- each cooling spray nozzle is any one or more of a flat spray nozzle, a full cone spray nozzle, a square spray spray nozzle, and an elliptical spray spray nozzle, and cooling when cooling water is sprayed from each cooling spray nozzle
- Each cooling header has a plurality of cooling spray nozzles attached in the width direction of the steel plate,
- the cooling spray nozzles adjacent in the steel plate width direction are connected to cooling headers of different cooling water supply systems, and
- the flow density of the cooling water injected from the cooling spray nozzles adjacent to the steel plate in the width direction is different flow density, and from the cooling spray nozzle which sprays the cooling water with the maximum flow density for the same injection pressure, It is possible to inject three times more flow density of cooling water from the cooling spray nozzle that injects the flow density of cooling water,
- a method of cooling a thick steel plate wherein each cooling water supply system is individually selected and controlled using a control valve so as to inject the cooling water from a cooling spray nozzle.
- each cooling spray nozzle is any one or more of a flat spray nozzle, a full cone spray nozzle, a square spray spray nozzle, and an elliptical spray spray nozzle, and cooling when cooling water is sprayed from each cooling spray nozzle
- Manufacturing equipment for thick steel plate provided with the cooling device according to any one of [1] to [3].
- a method for producing a thick steel plate comprising the step of cooling by the cooling method according to any one of [4] to [6].
- FIG. 1 is a schematic view of an off-line heat treatment facility for thick steel plate using the cooling device of the present invention.
- FIG. 2 is a schematic view showing an embodiment of the cooling device of the present invention.
- FIG. 3 is a view for explaining the positional relationship between the cooling spray nozzle and the restraining roll of the present invention.
- FIG. 4 is a view showing an injection angle of the cooling water (spray water) injected from the cooling spray nozzle.
- FIG. 5 is a schematic view of the cooling device of the present invention as viewed from above, and FIG. 5 (a) is a view showing the structure of a cooling header, and FIGS. 5 (b) and 5 (c) are sprays sprayed from a cooling spray nozzle. It is a figure which shows the appearance of water.
- FIG. 6 is a view showing the arrangement of the cooling header and the cooling spray nozzle in the case where the number of cooling header systems is increased (four systems).
- FIG. 7 is a top view showing how spray water of a small flow rate cooling spray nozzle collides with a thick steel plate when spraying cooling water from two cooling headers, and FIG. 7 (a) is a flat spray When using a nozzle, FIG. 7 (b) uses an oval spray nozzle, FIG. 7 (c) uses a full cone spray nozzle, and FIG. 7 (d) uses a square spray nozzle. is there.
- FIG. 8 is a schematic view of the large flow rate cooling spray nozzle and the small flow rate cooling spray nozzle, in which the nozzle pitch is different, and FIG.
- FIG. 8 (a) is a view showing the structure of the cooling header
- FIG. 8 (b) These are figures which show the mode of the spraying water of a large flow rate cooling spray nozzle
- FIG.8 (c) is a figure which shows the mode of spraying water of a small flow rate cooling spray nozzle.
- FIG. 9 is a schematic view of a cooling treatment facility for thick steel plate using the cooling device of the present invention.
- FIG. 10 is a graph showing the relationship between the injection pressure and the flow density in the large flow rate cooling spray nozzle and the small flow rate cooling spray nozzle.
- FIG. 11 is a graph showing the relationship between the cooling rate and the flow density until reaching 800 ° C. to 400 ° C. at the center in the thickness direction when the steel plate is cooled.
- FIG. 1 is a view for explaining a case where the cooling device of the present invention is applied to off-line heat treatment of a thick steel plate.
- the thick steel plate S is previously processed to a predetermined thickness (for example, 40 mm) and width (for example, 2500 mm) by a rolling facility, conveyed to the heat treatment line, and then heated to a predetermined temperature (for example, 920 ° C.) by the heating furnace 1 After that, it is cooled by the cooling device 2 installed on the outlet side of the heating furnace 1.
- the cooling device 2 includes a table roll 3 for conveying the thick steel plate S, a constraining roll 4 for holding the thick steel plate S, and cooling headers 5 provided on the upper and lower surfaces of the thick steel plate S.
- FIG. 2 The details of the cooling device 2 according to an embodiment of the present invention are shown in FIG.
- FIG. 2 there are a plurality of table rolls 3 for transporting thick steel plate S and a plurality of constraining rolls 4 for constraining thick steel plate S, and high flow rate cooling is performed on the upper surface and the lower surface (between table rolls 3) between the constraining rollers 4
- a plurality of headers 51 and small flow rate cooling headers 52 are installed.
- the flow rate of the cooling water supplied to the cooling header is measured by the flow meter 6, and the flow control valve 7 is installed so that the flow rate can be adjusted to a predetermined flow rate based on the measured result.
- the flow rate adjustment valve 7 is connected to a control mechanism (not shown) so that on / off (water supply / shutoff) of the cooling water can be set individually.
- a plurality of cooling spray nozzles 53 (54) are attached to each cooling header. The details of the cooling spray nozzle 53 (54) will be described later.
- the positional relationship between the cooling header (cooling spray nozzle) and the restraining roll 4 on the upper surface of the thick steel plate will be described.
- the pitch of the table roll 3 and the restraint roll 4 is the same. Therefore, the positional relationship between the cooling header (cooling spray nozzle) and the table roll 3 on the lower surface of the thick steel plate is similar to the positional relationship between the cooling header (cooling spray nozzle) and the restraining roll 4 on the upper surface of the thick steel plate.
- FIG. 3 is a view for explaining the positional relationship between the cooling spray nozzle and the restraining roll of the present invention.
- application to a thick steel plate is mainly considered, and it is an important issue to prevent the out-of-plane deformation that occurs when the thick steel plate is cooled. Therefore, in order to prevent out-of-plane deformation, cooling is performed while restraining the thick steel plate S with the restraining roll 4 and the table roll 3. At that time, it is advantageous that the installation pitch (restraint roll pitch P) in the transport direction of the constraining roll 4 be as narrow as possible from the viewpoint of preventing the out-of-plane deformation of the steel plate.
- the constraining roll diameter D be as large as possible in order to reduce the deflection of the constraining roll 4 even if a large load is applied.
- the constraining roll pitch P of the constraining roll 4 is narrower, the inter-roll gap G becomes narrower, so the space for installing the cooling device 2 becomes smaller. For this reason, installation of the cooling device like this invention is impossible in the nozzle which requires a big cooling header especially as described in patent document 3.
- FIG. 1 is a big cooling header especially as described in patent document 3.
- the spray length L when the cooling spray nozzle 53 (or the cooling spray nozzle 54) is viewed from the side It is preferable that the cooling water be applied to the thick steel plate S so as to be wider than the gap G and to a region under the restraining roll 4. From such a point of view as well, a method capable of spraying cooling water over a wide range such as spray cooling is preferable.
- the ratio P / D of the constraining roll pitch P to the constraining roll diameter D of the constraining roll 4 is in the range of 2.5 or less.
- P / D is 1.0
- the restraining roll pitch and the restraining roll diameter are the same, and there is no gap between the restraining rolls that run back and forth, and the cooling spray nozzle can not be installed. Therefore, P / D is preferably more than 1.0, and the gap (P ⁇ D) of the restraining rolls that run back and forth can be secured at least 50 mm or more. Therefore, in terms of operation, P / D is more preferably 1.17 or more. Further, P / D is preferably as small as possible in view of shape control, so P / D is preferably 2.0 or less.
- the roll diameter of the table roll 3 and the restraining roll diameter D do not necessarily have to be the same diameter.
- the ratio P / D may satisfy 2.5 or less.
- the ratio of the roll pitch of the table roll 3 and the table roll diameter on the lower surface of the thick steel plate may be 2.5 or less.
- the spray length L of the cooling spray nozzle 53 (54) in the transport direction between the restraining rolls 4 decreases as much as possible the uncooled portion between the restraining rolls 4 as close to the restraining roll pitch P as possible. Cooling is possible. For this reason, it is preferable that at least the spray length L be larger than the inter-roll gap G. On the other hand, in order to increase the spray length L, it is necessary to increase the injection angle ⁇ of the cooling spray nozzle 53 (54) shown in FIG.
- the injection angle ⁇ of the cooling spray nozzle 53 (54) is made too large, or the central axis of the nozzle of the cooling spray nozzle 53 (54)
- the spray water 55 (56) from the cooling spray nozzle 53 (54) collides with the restraining roll 4 before colliding with the thick steel plate S. There is a possibility that the thick steel plate S can not be cooled efficiently.
- the nozzle central axis of the cooling spray nozzle 53 (54) is within ⁇ 10 mm from the center position between the restraining rolls 4 with respect to the transport direction (left and right direction in the drawing) It is preferable to arrange the nozzle central axis of the cooling spray nozzle 53 (54), and a substantially central position between the restraining rolls 4 is most preferable.
- Fig.5 (a) is the schematic diagram which looked at the cooling device 2 of this invention from the top, and is a figure explaining the structure of a cooling header.
- a plurality of large flow rate cooling spray nozzles 53 are attached to the large flow rate cooling header 51 in the steel plate width direction.
- a plurality of small flow rate cooling spray nozzles 54 are attached to the small flow rate cooling header 52 in the steel plate width direction.
- the cooling spray nozzles are arranged such that cooling spray nozzles having different unit areas and flow rates per unit time are arranged.
- per unit area and per unit time here are made into the flow volume of the cooling water injected to the range of space
- the unit area and the flow rate per unit time are hereinafter referred to as flow density (unit: L / (min ⁇ m 2 )).
- the large flow rate cooling header 51 is attached with a cooling spray nozzle with a large flow rate density, and the small flow rate cooling header 52 with a small flow rate cooling spray nozzle. Cooling spray nozzles adjacent in direction are connected to cooling headers of different systems.
- cooling spray nozzles having different flow density are disposed adjacent to each other in the width direction.
- the large flow rate cooling spray nozzles 53 and the small flow rate cooling spray nozzles 54 may be arranged at a predetermined pitch in a row in the width direction of the thick steel plate S.
- the flow control valve 7 shuts off the water supply to the small flow rate cooling header 52 so that the cooling water is not injected from the small flow rate cooling spray nozzle 54. Cooling water is sprayed from the nozzle 53.
- the flow rate adjusting valve 7 shuts off the water supply to the large flow rate cooling header 51 so that the cooling water is not injected from the large flow rate cooling spray nozzle 53 by the flow rate adjusting valve 7. Cooling water is injected from the cooling spray nozzle 54. That is, in the present invention, by individually selecting each cooling water supply system and injecting the cooling water, the flow rate can be adjusted in a wide range, and the cooling rate can be adjusted in a wide range.
- the flow rate of the cooling water is proportional to the 0.5 power of the injection pressure, so the flow rate changes even if the injection pressure is lowered. There are few, and it is quite difficult to make a large change in the cooling rate.
- the cooling rate is said to be proportional to the flow density to the power of about 0.7.
- the cooling rate is proportional to about 0.35 power of the injection pressure.
- the cooling pressure is substantially limited at most to a adjustment of about 50 to 100%.
- the injection flow rate is proportional to the injection pressure to the 0.5 power, the injection flow rate is 31.6 to 100%, considering that the injection pressure can be adjusted in the range of about 10 to 100% as described above. Adjustment in the range is the limit. Therefore, in the present invention, by arranging cooling spray nozzles having different flow density between the constraining rolls 4, it is possible to adjust a wide range of cooling rates.
- the flow rate density of the cooling water injected from the cooling spray nozzles adjacent in the steel plate width direction is different flow density, and the cooling spray nozzle which sprays the cooling water of the maximum flow density for the same injection pressure. From this, it is possible to inject three times or more flow density of cooling water from the cooling spray nozzle that injects the cooling water of minimum flow density.
- the flow density of the large flow rate cooling spray nozzle 53 disposed at an interval of the pitch P ′ is at least three times higher than the small flow rate cooling spray nozzle 54 for the same injection pressure. It becomes a density.
- the flow density of the large flow rate cooling spray nozzle 53 is 1500 L / (min M 2 )
- the flow density of the small flow rate cooling spray nozzle 54 is selected to be 500 L / (min ⁇ m 2 ).
- the flow rate density of the large flow rate cooling spray nozzle 53 is 500 L / (min ⁇ m 2 ) (1/3 of the rating)
- the small flow rate cooling spray nozzle The flow density of 54 can be adjusted up to 167 L / (min ⁇ m 2 ) (1/3 of the rating). Therefore, the maximum flow density 1500L / (min ⁇ m 2 ) of the large flow rate cooling spray nozzle and the minimum flow density 167L / (min ⁇ m 2 ) of the small flow rate cooling spray nozzle are continuous by switching the flow rate control and the cooling spray nozzle. It is possible to adjust the flow rate.
- the maximum of the small flow rate cooling spray nozzle 54 The flow density does not have to be the same flow density as the minimum flow density of the large flow cooling spray nozzle 53, for example, the maximum flow density of the large flow cooling spray nozzle 53 is 1500 L / (min ⁇ m 2 ), the small flow cooling spray nozzle The maximum flow density of 54 may be selected as 50 L / (min ⁇ m 2 ).
- the cooling spray nozzles having different flow density are disposed adjacent to each other and only one of them is jetted, the disposition thereof is, for example, fan-like spraying as shown in FIG. 5 (b) and FIG. 5 (c). If it demonstrates in the example of a flat spray shape, injection angle (theta) that the width end part of the spray water 55 injected from the large flow rate cooling spray nozzle 53 of FIG.5 (b) becomes substantially the same position as the adjacent spray water 55. (See FIG. 4) and twist angle ⁇ (see FIG. 5 (c)) produce a portion where the cooling water does not collide with the steel plate across the width direction seen from the steel plate side when the steel plate passes through and cools It is possible to cool the steel plate uniformly without.
- the injection angle ⁇ (see FIG. 5) is such that the width end of the spray water 56 sprayed from the small flow rate cooling spray nozzle 54 becomes substantially the same position as the adjacent spray water 56. 4) and the torsion angle ⁇ (see FIG. 5 (c)), so that when the steel sheet passes through and cools, it does not produce a portion where the cooling water does not collide with the steel sheet across the width direction seen from the steel sheet side , Can uniformly cool the steel plate.
- the spray angle ⁇ of the cooling spray nozzle (the large flow rate cooling spray nozzle 53 or the small flow rate cooling spray nozzle 54), a cooling spray nozzle is installed between the narrow restraining rolls 4 and the sprayed cooling water does not collide with the restraining rolls 4 Since it is preferable that the steel sheet be covered with water, it is preferable that the steel sheet can be sprayed at the widest possible angle.
- the spray angle ⁇ (see FIG. 4) of the cooling spray nozzle is preferably at least 60 to 120 °. If the injection angle ⁇ is less than 60 °, the cooling water is not dispersed over a wide area, so there is a concern about temperature unevenness due to the non-collision part of the cooling water. On the other hand, when the injection angle is larger than 120 °, the distance between the spray water and the steel plate changes significantly depending on the distance between the bottom of the nozzle and the distance to the other places. Is difficult to secure.
- tip of a cooling spray nozzle to a steel plate is demonstrated using FIG.
- the distance between the cooling spray nozzle (the large flow rate cooling spray nozzle 53 or the small flow rate cooling spray nozzle 54) and the thick steel plate S is close to that of the steel plate in view of the collision between the restraining roll 4 and the spray water. Even if the injection is performed at a wide injection angle ⁇ , the cooling water hardly collides with the restraining roll 4.
- the distance between the cooling spray nozzle and the thick steel plate S is larger than half the restraining roll diameter D at which the gap between the restraining rolls 4 is the narrowest, the minimum gap between the restraining rolls 4 causes the cooling spray nozzle to Spray water is likely to collide with the restraining roll 4. Therefore, it is preferable that the distance between the cooling spray nozzle and the thick steel plate S be as low as possible near the half (radius) of the constraining roll diameter D.
- the spray water must be jetted at a wide angle, and there is a risk that the jet angle ⁇ shown above exceeds 120 °.
- the tip of the steel plate in the sheet passing and the tip of the cooling spray nozzle may collide with each other.
- the distance H from the tip of each cooling spray nozzle to the steel plate is the center of the constraining rolls on the upstream and downstream sides of the spray nozzle in the steel plate transport direction. It is preferable to dispose the tip of the spray nozzle within ⁇ 50 mm with respect to the height of the constraining roll central axis which is the distance from the shaft to the steel plate.
- the present invention can be applied to two or more lines.
- the number of cooling header systems can be increased (four systems) to adjust the cooling rate to a wider range.
- a large flow rate cooling header 51 having a plurality of large flow rate cooling spray nozzles 53 attached in the steel plate width direction
- another small flow rate cooling header 52 having a plurality of small flow rate cooling spray nozzles 54 attached in the steel plate width direction.
- the medium flow rate cooling headers 57, 58 are disposed.
- a plurality of medium flow rate cooling spray nozzles 59, 60 are attached to the medium flow rate cooling headers 57, 58 in the width direction of the steel plate, respectively.
- the flow density of the large flow rate cooling spray nozzle 53 the 1500L / (min ⁇ m 2)
- the flow density of the cooling spray nozzle 54 is selected as 10 L / (min ⁇ m 2 ).
- each cooling spray nozzle is preferably any one or more of a flat spray nozzle, a full cone spray nozzle, an angular spray nozzle, and an elliptical spray nozzle.
- each cooling spray nozzle means an angle at which the spray angle is the widest in each direction when the spray jet water is viewed from the side.
- FIG. 7 is a top view of the spray water 55 (56) of the cooling spray nozzle 53 (54) colliding with the thick steel plate.
- FIG. 7 (a) shows an example of a flat spray nozzle which is jetted substantially in a fan shape, the collision surface has a thin thickness (about 20 mm) and a wide width
- FIG. 7 (b) is an example of an oval spray nozzle where the collision surface is elliptical. As shown in FIGS.
- FIG. 8 (a) is a diagram showing the configuration of a cooling header in the case where the mounting pitch of the small flow cooling spray nozzle 54 is doubled with respect to the mounting pitch of the large flow cooling spray nozzle 53 in the width direction; 8 shows a state of the spray water of the large flow rate spray nozzle 53, and FIG. 8 (c) shows a state of the spray water of the small flow rate cooling spray nozzle 54.
- FIG.8 (b) (c) it is a case where all spray nozzles use a flat spray nozzle.
- low-flow cooling spray nozzles 54 are as 375L / (min ⁇ m 2) .
- the large flow rate cooling spray nozzle 53 and the small flow rate cooling spray nozzle 54 may have different spray types.
- the cooling device of the present invention can be suitably used for thick steel plates having a plate thickness of 4.0 mm or more and a plate width of 100 mm or more.
- the manufacturing equipment of the thick steel plate provided with the cooling device of the present invention since the cooling rate can be adjusted in a wide range while controlling the shape of the thick steel plate, it is possible to manufacture thick steel plates having various strengths. It is. Further, according to the cooling method of the present invention, since the thick steel plate can be cooled at a wide range of cooling rates while controlling the shape of the thick steel plate, the manufacturing method includes the step of cooling the thick steel plate by the cooling method of the present invention. If so, thick steel plates having various strengths can be manufactured.
- a thick steel plate was manufactured using the off-line heat treatment equipment for thick steel plate shown in FIG. After heating a steel plate of a steel plate (thickness 25 mm, plate width 3500 mm, steel plate length 7 m) at room temperature to 920 ° C. in the heating furnace 1, the steel plate temperature is 100 in the cooling device 2 located 2.5 m behind the heating furnace 1. The sheet passing speed was adjusted and cooled to be ° C.
- the configuration of the cooling device 2 is the same as that of FIG.
- the cooling spray nozzles 53 and 54 and the restraining roll 4 were installed 15 sets (cooling device 2 length 9.0 m) with respect to the steel plate conveyance direction.
- the arrangement of the cooling spray nozzles 53 and 54 is the same as in FIG. 3, and the distance between the cooling spray nozzle and the steel plate is 200 mm.
- the large flow rate cooling spray nozzle 53 is a flat spray nozzle that is jetted at 150 L / min at a jet pressure of 0.4 MPa.
- the injection angle ⁇ of the large flow rate cooling spray nozzle 53 is 100 °
- the width direction pitch P 'of the large flow rate cooling spray nozzles 53 adjacent to each other is 160 mm
- the twist angle ⁇ is 48 ° in the steel sheet traveling direction.
- the flow density of the large flow rate cooling spray nozzle 53 is 1563 L / (min ⁇ m 2 ) when the injection pressure is 0.4 MPa.
- the small flow rate cooling spray nozzle 54 is a flat spray nozzle that is jetted at 40 L / min at a jetting pressure of 0.4 MPa.
- the injection angle ⁇ of the small flow rate cooling spray nozzle 54 is 100 °
- the width direction pitch P ′ of the adjacent small flow rate cooling spray nozzles 54 is 160 mm
- the twist angle ⁇ is 48 ° in the steel sheet advancing direction.
- the flow density of the small flow rate cooling spray nozzle 54 is 417 L / (min ⁇ m 2 ).
- FIG. 10 is a graph showing the relationship between the injection pressure and the flow density in the large flow rate cooling spray nozzle 53 and the small flow rate cooling spray nozzle 54.
- water is supplied to the large flow rate cooling header 51, and the injection pressure in the large flow rate cooling spray nozzle 53 is gradually reduced from 0.4 MPa.
- the injection pressure can be adjusted by the flow rate adjusting valve 7 until the injection pressure is about 0.04 MPa.
- the pressure if the pressure is lower than this, the pressure largely fluctuates due to a slight difference in the degree of opening of the flow control valve 7, so that the pressure can not be stably adjusted.
- the flow density at an injection pressure of 0.4 MPa in the small flow rate cooling spray nozzle 54 is 417 L / (min ⁇ m 2 ), and cooling water having a flow density substantially equal to the lower limit water volume of the large flow rate cooling spray nozzle 53 can be injected. I understand.
- the pressure of the small flow rate cooling spray nozzle 54 was gradually decreased from 0.4 MPa, the pressure could be adjusted by the flow rate adjusting valve 7 until the injection pressure was about 0.04 MPa, but if the pressure is lowered than this Due to the slight difference in the degree of opening of the flow control valve 7, the pressure largely fluctuates and the pressure can not be stably adjusted.
- the flow density of the small flow rate cooling spray nozzle 54 was 132 L / (min ⁇ m 2 ) when the injection pressure was 0.04 MPa.
- FIG. 11 shows the relationship between the cooling rate and the flow density until the steel plate is actually cooled and reaches 800 ° C. to 400 ° C. at the center in the plate thickness direction.
- Each cooling spray nozzle had the same configuration as that of FIG.
- a scanning radiation thermometer (not shown) is installed on the inlet side and outlet side of the cooling device, and the surface temperature of the steel plate is measured across the plate width direction and the longitudinal direction. Based on the information of the inlet and outlet thermometers, the average temperature in the thickness direction of the steel plate was calculated by heat transfer calculation, and the cooling rate during water cooling was calculated. The cooling rate was taken as the cooling rate at the center of the steel plate at the center of the plate width and in the longitudinal direction of the steel plate.
- the cooling rate can be adjusted in the range of about 20 to 30 ° C./s by cooling with the large flow rate cooling spray nozzle 53, and by cooling with the small flow rate cooling spray nozzle 54. It has been found that the cooling rate can be adjusted in the range of 7 to 20 ° C./s, and it is possible to adjust the cooling rate in a wider range than when each cooling spray nozzle is used alone.
- the temperature deviation in the width direction was measured with a scanning radiation thermometer at a pitch of 20 mm in the width direction and at a pitch of 100 mm in the longitudinal direction, and the value at the central portion in the longitudinal direction of the steel plate was taken as the temperature deviation in the width direction.
- the configuration of the cooling device 2 is the same as in FIG. 2, and the diameters of the table roll 3 and the constraining roll 4 are as shown in Table 1. Further, each of the large flow rate spray nozzle 53 and the small flow rate spray nozzle 54 was a flat spray nozzle, and the injection angle ⁇ , the pitch P ′ in the width direction, and the twist angle ⁇ were as shown in Table 1, respectively. In addition, the length of the cooling device 2 was 9.0 m, and the number of installed restraining rolls 4 and the cooling spray nozzle 53 (54) was as shown in Table 1.
- the cooling rate can be adjusted in the range of about 20 to 30 ° C./s by cooling with the large flow rate cooling spray nozzle 53, and by cooling with the small flow rate cooling spray nozzle 54
- the cooling rate could be adjusted in the range of 7 to 20 ° C./s.
- the temperature deviation of the board width direction at this time was all less than 15 degreeC. Later, the strength of the cooling material was measured, etc., but it was at a level at which there was no problem with the quality.
- the cooling rate can be adjusted in the range of about 20 to 30 ° C./s by cooling with the large flow rate cooling spray nozzle 53, and by cooling with the small flow rate cooling spray nozzle 54
- the cooling rate could be adjusted in the range of 7 to 20 ° C./s.
- the temperature deviation of the board width direction at this time was less than 20 degreeC. Although the temperature deviation was slightly larger than when P / D was 2.0, the strength of the cooling material was measured later, and there was no particular problem with the quality.
- Comparative Examples 1 to 8 are examples in which the restraining roll pitch P is larger than those of Examples 1 to 8.
- P / D is 3.0 and is outside the scope of the present invention.
- the cooling rate may be adjusted in the range of about 20 to 30 ° C./s by cooling by the large flow rate cooling spray nozzle 53 and in the range of about 7 to 20 ° C./s by cooling the small flow rate cooling spray nozzle 54. did it.
- the steel plate was deformed in the shape of a wave.
- Comparative Examples 9 to 16 are examples in which the roll diameter D is smaller than those of Examples 1 to 8 of the present invention.
- P / D is 2.7 and is outside the scope of the present invention.
- the cooling rate may be adjusted in the range of about 20 to 30 ° C./s by cooling by the large flow rate cooling spray nozzle 53 and in the range of about 7 to 20 ° C./s by cooling the small flow rate cooling spray nozzle 54. did it.
- the steel plate was deformed in the shape of a wave.
- visual observation of the constraining roll on the cooling device intrusion side showed that there was a gap between the constraining roll and the steel plate, and the cooling water leaked from the gap to a part in the width direction to cool the steel plate.
- the temperature deviation in the plate width direction at this time varies in the range of 35 to 60 ° C.
- the strength of the cooling material is measured later, the hardness of the steel plate at the portion where leaked water was raised becomes high. There was a problem above.
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Abstract
Description
[1]鋼板搬送方向に拘束ロールを複数設置し、各拘束ロール間に複数の冷却ヘッダを配置した冷却装置において、
拘束ロールピッチPと拘束ロール径Dとの比率P/Dを2.5以下とし、
それぞれの冷却ヘッダは、2つ以上の冷却水供給系統のいずれかに接続され、
各冷却水供給系統には給水のオンオフ及び流量制御が独立して可能なように調整弁が取り付けられており、
各冷却ヘッダには、鋼板幅方向に複数の冷却スプレーノズルが取り付けられており、
鋼板幅方向に隣り合う冷却スプレーノズルはそれぞれ異なる冷却水供給系統の冷却ヘッダに接続されるとともに、
鋼板幅方向に隣り合う冷却スプレーノズルから噴射される冷却水の流量密度は相異なる流量密度とし、同一の噴射圧力に対して、最大の流量密度の冷却水を噴射する冷却スプレーノズルからは、最小の流量密度の冷却水を噴射する冷却スプレーノズルからの3倍以上の流量密度の冷却水を噴射可能であり、
各冷却水供給系統を個別に選択して冷却スプレーノズルから冷却水を噴射するように調整弁を用いて制御する制御機構
を備える厚鋼板の冷却装置。
[2]各冷却スプレーノズルの先端から鋼板までの距離は、拘束ロール中心軸高さに対して±50mm以下の範囲の位置になるように設置されてなる[1]に記載の厚鋼板の冷却装置。
[3]各冷却スプレーノズルは、フラットスプレーノズル、フルコーンスプレーノズル、角吹きスプレーノズル、楕円吹きスプレーノズルのいずれか1種以上であり、各冷却スプレーノズルから冷却水が噴射される際の冷却水の噴射角度は60~120゜の範囲である[1]または[2]に記載の厚鋼板の冷却装置。
[4]鋼板搬送方向に拘束ロールを複数設置し、各拘束ロール間に複数の冷却ヘッダを配置した冷却装置を用いる厚鋼板の冷却方法において、
拘束ロールピッチPと拘束ロール径Dとの比率P/Dを2.5以下とし、
それぞれの冷却ヘッダは、2つ以上の冷却水供給系統のいずれかに接続され、
各冷却水供給系統には給水のオンオフ及び流量制御が独立して可能なように調整弁が取り付けられており、
各冷却ヘッダには、鋼板幅方向に複数の冷却スプレーノズルが取り付けられており、
鋼板幅方向に隣り合う冷却スプレーノズルはそれぞれ異なる冷却水供給系統の冷却ヘッダに接続されるとともに、
鋼板幅方向に隣り合う冷却スプレーノズルから噴射される冷却水の流量密度は相異なる流量密度とし、同一の噴射圧力に対して、最大の流量密度の冷却水を噴射する冷却スプレーノズルからは、最小の流量密度の冷却水を噴射する冷却スプレーノズルからの3倍以上の流量密度の冷却水を噴射可能であり、
各冷却水供給系統を個別に選択して冷却スプレーノズルから冷却水を噴射するように調整弁を用いて制御する
厚鋼板の冷却方法。
[5]各冷却スプレーノズルの先端から鋼板までの距離は、拘束ロール中心軸高さに対して、±50mm以下の範囲の位置になるように設置されてなる[4]に記載の厚鋼板の冷却方法。
[6]各冷却スプレーノズルは、フラットスプレーノズル、フルコーンスプレーノズル、角吹きスプレーノズル、楕円吹きスプレーノズルのいずれか1種以上であり、各冷却スプレーノズルから冷却水が噴射される際の冷却水の噴射角度は60~120゜の範囲である[4]または[5]に記載の厚鋼板の冷却方法。
[7][1]~[3]のいずれかに記載の冷却装置を備えた厚鋼板の製造設備。
[8][4]~[6]のいずれかに記載の冷却方法で冷却する工程を有する厚鋼板の製造方法。
2 冷却装置
3 テーブルロール
4 拘束ロール
5 冷却ヘッダ
51 大流量冷却ヘッダ
52 小流量冷却ヘッダ
53 大流量冷却スプレーノズル
54 小流量冷却スプレーノズル
55 噴霧水
56 噴霧水
57 中流量冷却ヘッダ
58 中流量冷却ヘッダ
59 中流量冷却スプレーノズル
60 中流量冷却スプレーノズル
6 流量計
7 流量調整弁
8 圧延機
9 熱間矯正機
S 厚鋼板
P 拘束ロールピッチ
D 拘束ロール径
G ロール間ギャップ
L 噴霧長さ
H ノズル高さ
P´ (幅方向の)ピッチ
θ 噴射角度
α 捩り角度
Claims (8)
- 鋼板搬送方向に拘束ロールを複数設置し、各拘束ロール間に複数の冷却ヘッダを配置した冷却装置において、
拘束ロールピッチPと拘束ロール径Dとの比率P/Dを2.5以下とし、
それぞれの冷却ヘッダは、2つ以上の冷却水供給系統のいずれかに接続され、
各冷却水供給系統には給水のオンオフ及び流量制御が独立して可能なように調整弁が取り付けられており、
各冷却ヘッダには、鋼板幅方向に複数の冷却スプレーノズルが取り付けられており、
鋼板幅方向に隣り合う冷却スプレーノズルはそれぞれ異なる冷却水供給系統の冷却ヘッダに接続されるとともに、
鋼板幅方向に隣り合う冷却スプレーノズルから噴射される冷却水の流量密度は相異なる流量密度とし、同一の噴射圧力に対して、最大の流量密度の冷却水を噴射する冷却スプレーノズルからは、最小の流量密度の冷却水を噴射する冷却スプレーノズルからの3倍以上の流量密度の冷却水を噴射可能であり、
各冷却水供給系統を個別に選択して冷却スプレーノズルから冷却水を噴射するように調整弁を用いて制御する制御機構
を備える厚鋼板の冷却装置。 - 各冷却スプレーノズルの先端から鋼板までの距離は、拘束ロール中心軸高さに対して±50mm以下の範囲の位置になるように設置されてなる請求項1に記載の厚鋼板の冷却装置。
- 各冷却スプレーノズルは、フラットスプレーノズル、フルコーンスプレーノズル、角吹きスプレーノズル、楕円吹きスプレーノズルのいずれか1種以上であり、各冷却スプレーノズルから冷却水が噴射される際の冷却水の噴射角度は60~120゜の範囲である請求項1または2に記載の厚鋼板の冷却装置。
- 鋼板搬送方向に拘束ロールを複数設置し、各拘束ロール間に複数の冷却ヘッダを配置した冷却装置を用いる厚鋼板の冷却方法において、
拘束ロールピッチPと拘束ロール径Dとの比率P/Dを2.5以下とし、
それぞれの冷却ヘッダは、2つ以上の冷却水供給系統のいずれかに接続され、
各冷却水供給系統には給水のオンオフ及び流量制御が独立して可能なように調整弁が取り付けられており、
各冷却ヘッダには、鋼板幅方向に複数の冷却スプレーノズルが取り付けられており、
鋼板幅方向に隣り合う冷却スプレーノズルはそれぞれ異なる冷却水供給系統の冷却ヘッダに接続されるとともに、
鋼板幅方向に隣り合う冷却スプレーノズルから噴射される冷却水の流量密度は相異なる流量密度とし、同一の噴射圧力に対して、最大の流量密度の冷却水を噴射する冷却スプレーノズルからは、最小の流量密度の冷却水を噴射する冷却スプレーノズルからの3倍以上の流量密度の冷却水を噴射可能であり、
各冷却水供給系統を個別に選択して冷却スプレーノズルから冷却水を噴射するように調整弁を用いて制御する
厚鋼板の冷却方法。 - 各冷却スプレーノズルの先端から鋼板までの距離は、拘束ロール中心軸高さに対して、±50mm以下の範囲の位置になるように設置されてなる請求項4に記載の厚鋼板の冷却方法。
- 各冷却スプレーノズルは、フラットスプレーノズル、フルコーンスプレーノズル、角吹きスプレーノズル、楕円吹きスプレーノズルのいずれか1種以上であり、各冷却スプレーノズルから冷却水が噴射される際の冷却水の噴射角度は60~120゜の範囲である請求項4または5に記載の厚鋼板の冷却方法。
- 請求項1~3のいずれかに記載の冷却装置を備えた厚鋼板の製造設備。
- 請求項4~6のいずれかに記載の冷却方法で冷却する工程を有する厚鋼板の製造方法。
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EP18891282.8A EP3730633A4 (en) | 2017-12-20 | 2018-12-14 | COOLING DEVICE AND METHOD FOR THICK STEEL SHEET, AND MANUFACTURING EQUIPMENT AND METHOD FOR THICK STEEL SHEET |
CN201880081519.3A CN111492071A (zh) | 2017-12-20 | 2018-12-14 | 厚钢板的冷却装置及冷却方法以及厚钢板的制造设备及制造方法 |
CN202210684880.3A CN115156314A (zh) | 2017-12-20 | 2018-12-14 | 厚钢板的冷却装置及冷却方法以及厚钢板的制造设备及制造方法 |
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PCT/JP2018/046067 WO2019124241A1 (ja) | 2017-12-20 | 2018-12-14 | 厚鋼板の冷却装置および冷却方法ならびに厚鋼板の製造設備および製造方法 |
Country Status (5)
Country | Link |
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EP (1) | EP3730633A4 (ja) |
JP (1) | JP6569843B1 (ja) |
KR (1) | KR102430390B1 (ja) |
CN (2) | CN111492071A (ja) |
WO (1) | WO2019124241A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114592112A (zh) * | 2022-02-25 | 2022-06-07 | 东北大学 | 一种钢板回火后柔性冷却装置 |
CN114635017A (zh) * | 2022-05-19 | 2022-06-17 | 北京煜鼎增材制造研究院有限公司 | 大型金属构件喷淋式热处理装置及热处理方法 |
CN114728320A (zh) * | 2019-11-25 | 2022-07-08 | 杰富意钢铁株式会社 | 钢板的制造设备及制造方法 |
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- 2018-12-14 CN CN201880081519.3A patent/CN111492071A/zh active Pending
- 2018-12-14 EP EP18891282.8A patent/EP3730633A4/en active Pending
- 2018-12-14 JP JP2019520653A patent/JP6569843B1/ja active Active
- 2018-12-14 CN CN202210684880.3A patent/CN115156314A/zh active Pending
- 2018-12-14 KR KR1020207017647A patent/KR102430390B1/ko active IP Right Grant
- 2018-12-14 WO PCT/JP2018/046067 patent/WO2019124241A1/ja unknown
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JPS5337510A (en) * | 1976-09-20 | 1978-04-06 | Ishikawajima Harima Heavy Ind Co Ltd | Steel sheet cooling equipment |
JPS5947010A (ja) | 1982-09-11 | 1984-03-16 | Kobe Steel Ltd | 鋼板下面冷却装置 |
JPS62130222A (ja) * | 1985-12-03 | 1987-06-12 | Nippon Steel Corp | 熱鋼板の冷却方法及び装置 |
JPS642718A (en) * | 1987-06-26 | 1989-01-06 | Nippon Steel Corp | Cooling method for thick steel plate |
JP2005118838A (ja) * | 2003-10-17 | 2005-05-12 | Nippon Steel Corp | 熱間圧延鋼板の冷却装置および冷却方法 |
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JP2011167759A (ja) | 2009-03-30 | 2011-09-01 | Jfe Steel Corp | 熱延鋼板の冷却装置 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114728320A (zh) * | 2019-11-25 | 2022-07-08 | 杰富意钢铁株式会社 | 钢板的制造设备及制造方法 |
CN114592112A (zh) * | 2022-02-25 | 2022-06-07 | 东北大学 | 一种钢板回火后柔性冷却装置 |
CN114635017A (zh) * | 2022-05-19 | 2022-06-17 | 北京煜鼎增材制造研究院有限公司 | 大型金属构件喷淋式热处理装置及热处理方法 |
Also Published As
Publication number | Publication date |
---|---|
EP3730633A1 (en) | 2020-10-28 |
CN111492071A (zh) | 2020-08-04 |
KR102430390B1 (ko) | 2022-08-05 |
JPWO2019124241A1 (ja) | 2019-12-19 |
EP3730633A4 (en) | 2020-12-02 |
JP6569843B1 (ja) | 2019-09-04 |
KR20200085880A (ko) | 2020-07-15 |
CN115156314A (zh) | 2022-10-11 |
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