WO2023007932A1 - 焼入れ装置、焼入れ方法、冷延鋼板の製造方法及びめっき鋼板の製造方法 - Google Patents

焼入れ装置、焼入れ方法、冷延鋼板の製造方法及びめっき鋼板の製造方法 Download PDF

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Publication number
WO2023007932A1
WO2023007932A1 PCT/JP2022/021485 JP2022021485W WO2023007932A1 WO 2023007932 A1 WO2023007932 A1 WO 2023007932A1 JP 2022021485 W JP2022021485 W JP 2022021485W WO 2023007932 A1 WO2023007932 A1 WO 2023007932A1
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Prior art keywords
metal plate
quenching
roll
steel sheet
rolls
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PCT/JP2022/021485
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English (en)
French (fr)
Japanese (ja)
Inventor
宗司 吉本
Original Assignee
Ｊｆｅスチール株式会社
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Application filed by Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to KR1020247001271A priority Critical patent/KR20240021278A/ko
Priority to CN202280049238.6A priority patent/CN117642517A/zh
Priority to EP22849011.6A priority patent/EP4345177A4/en
Priority to MX2024000939A priority patent/MX2024000939A/es
Priority to JP2022545354A priority patent/JP7424499B2/ja
Priority to US18/580,482 priority patent/US20240318272A1/en
Publication of WO2023007932A1 publication Critical patent/WO2023007932A1/ja

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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
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath quenching
    • 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
    • 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
    • C21D1/56—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
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D8/0236—Cold 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
    • 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
    • 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
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5735—Details
    • C21D9/5737—Rolls; Drums; Roll arrangements
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/22—Electroplating: Baths therefor from solutions of zinc

Definitions

  • the present invention relates to a quenching apparatus, a quenching method, a method for manufacturing a cold-rolled steel sheet, and a method for manufacturing a galvanized steel sheet.
  • the present invention relates to a quenching apparatus that facilitates switching between conditions for performing quenching and conditions for not performing quenching in order to increase the degree of hardening.
  • metal sheet products In the manufacture of steel sheets and other metal sheets (metal sheet products), in continuous annealing equipment that anneals metal sheets while they are continuously passed, the metal sheets are heated and then cooled to cause phase transformation. The material is built in.
  • cooling water injection nozzles are provided in multiple stages in immersion water for water-cooling a heated strip, and the headers of these nozzles are individually independent and arranged away from each other in the strip traveling direction. As a result, gaps are created between the nozzle headers, and a jet of cooling water collided with the surface to be cooled of the strip flows out behind the headers through the gaps between the headers.
  • a cooling device has been proposed that prevents lateral flow and provides uniformity in sheet width direction cooling.
  • Patent Document 2 a reflecting plate made of a metal plate or a heat insulating material is provided between the water injection nozzle and the steel strip to suppress radiation and heat conduction from the steel strip, and the steel strip is cooled by the water injection nozzle.
  • the cooling gas is supplied from the cooling gas supply unit to the water injection nozzle to cool the steel strip after quenching.
  • the present invention has been made to solve such problems.
  • the inventors of the present invention have obtained the following knowledge and ideas as a result of earnest studies to solve such problems.
  • a quenching device for cooling a metal plate a tank containing a cooling medium in which the metal plate is immersed; At least one pair arranged in the tank so as to sandwich the metal plate running in the tank, the distance from the metal plate being changeable, and rotating at a peripheral speed equal to or higher than the running speed of the metal plate and a quenching device.
  • the hardening apparatus according to [1] wherein the roll rotates in a direction opposite to the running direction of the metal plate.
  • a quenching method for cooling a metal plate using a quenching apparatus having a tank containing a cooling medium in which the metal plate is immersed When performing quenching by immersing a metal plate in a cooling medium, The metal plate is caused to travel in a tank containing a cooling medium, and at least one pair of rolls arranged to sandwich the metal plate traveling in the tank is adjusted to the traveling speed of the metal plate. The metal plate is cooled by rotating at a peripheral speed of above, If the metal plate is not quenched by immersing it in a cooling medium, A quenching method, wherein the metal plate is run in a bath containing no cooling medium, and the at least one pair of rolls is arranged farther from the metal plate than the arrangement when the quenching is performed.
  • [6] A method for producing a cold-rolled steel sheet, wherein the metal sheet is a cold-rolled steel sheet, and the annealed cold-rolled steel sheet is quenched by the quenching method according to [4] or [5].
  • [7] A method for producing a plated steel sheet, wherein the steel sheet obtained by the method for producing a cold-rolled steel sheet according to the above [6] is plated.
  • the plating treatment is one selected from electro-galvanizing treatment, hot-dip galvanizing treatment, and alloying hot-dip galvanizing treatment.
  • the cooling effect of the metal plate is excellent, and when quenching by immersing it in the cooling medium is not performed. Therefore, it is possible to provide a quenching device that can prevent thermal deformation of the device and that can easily switch between conditions for performing quenching and conditions for not performing quenching.
  • a metal plate for example, a steel plate heated in a continuous annealing facility that performs annealing while continuously threading is switched between conditions for performing quenching and conditions for not performing quenching.
  • a metal plate for example, a steel plate heated in a continuous annealing facility that performs annealing while continuously threading is switched between conditions for performing quenching and conditions for not performing quenching.
  • remove the members placed in the tank of the quenching apparatus in order to prevent thermal deformation caused by heat radiation from the metal plate, and prevent the thermal deformation in the tank
  • the work of installing the reflector is not necessary, and the switching is easy. Therefore, both a metal plate that requires quenching and a metal plate that does not require quenching can be manufactured with a single quenching apparatus with high productivity. Furthermore, thermal deformation caused by heat radiation from the metal plate can be suppressed.
  • FIGS. 1 and 2 are diagrams (side views) respectively showing a quenching device 11 according to an embodiment of the present invention
  • FIG. 1 is a diagram showing the state of the quenching device 11 under conditions for performing quenching
  • FIG. 2 is a diagram showing the state of the quenching device 11 under conditions in which quenching is not performed.
  • This quenching apparatus 11 can be applied, for example, to a cooling facility installed on the delivery side of a soaking furnace of a continuous annealing apparatus.
  • the quenching apparatus 11 includes a tank (tank) 5 containing a cooling medium (liquid, water in this embodiment) 2, and sink rolls 3 for changing the running direction of the metal plate 1. , with a roll (stirring roll) 4 rotating at high speed.
  • the rolls 4 are operated in pairs (rolls 4 a and 4 b ), and at least one pair is arranged in the tank 5 .
  • the roll 4 agitates and removes a vapor film generated on the surface of the metal plate 1 during quenching in which the metal plate 1 is immersed in a cooling medium. That is, in the prior art, the steam film on the metal surface was removed by spraying a cooling medium (water) from a nozzle, but in the present invention, the same cooling effect is obtained by removing it by roll agitation.
  • the rolls 4 are arranged to sandwich the metal plate 1 running in the tank 5 (in the cooling medium 2). , they are arranged at positions facing each other with the metal plate 1 interposed therebetween.
  • the quenching apparatus 11 shown in FIG. 1 six pairs of rolls are arranged along the traveling direction of the metal plate 1 from above to below the bath 5 at predetermined intervals.
  • the arrows attached to the rolls 4 indicate the rotation direction of the rolls 4.
  • An arrow along the metal plate 1 indicates the running direction of the metal plate 1 .
  • the rolls 4 are arranged at positions where the effect of removing the vapor film generated on the surface of the metal plate 1 during rapid cooling of the metal plate 1 can be obtained.
  • quenching refers to a process of cooling the metal plate 1 that has been heated by annealing or the like by immersing it in a cooling medium (liquid, water in this embodiment).
  • the rolls 4a and 4b are arranged within a distance of 50 mm from the metal plate 1 from the position where the outer circumferences of the rolls come into contact with the metal plate 1.
  • the roll 4 (roll 4a, roll 4b) is arranged at a position where the outer circumference of the roll is in contact with the metal plate 1 to obtain the most remarkable effect.
  • the rolls 4 rotate at a peripheral speed equal to or higher than the running speed of the metal plate. More specifically, the peripheral speed of the roll 4 is preferably a relative speed of 1.0 times or more the running speed of the metal plate 1 . If the peripheral speed of the roll 4 is less than 1.0 times relative to the running speed of the metal plate 1, the stirring performance is lowered, and the effect of removing the vapor film on the surface of the metal plate 1 cannot be sufficiently obtained. , the cooling effect of the metal plate 1 cannot be sufficiently obtained. Moreover, it is preferable that the peripheral speed of the roll 4 is a relative speed of 3.0 times or less of the running speed of the metal plate 1 . When the peripheral speed of the roll 4 is 3.0 times or less relative to the running speed of the metal plate 1 , it becomes easier to suppress the generation of flaws on the surface of the metal plate 1 .
  • the direction of rotation of the rolls 4 is not limited, but in order to improve the stirring performance of the steam film on the surface of the metal plate 1 more efficiently, the rolls 4 are rotated over the metal plate 1. It is preferable to rotate in the direction opposite to the running direction (see FIG. 1).
  • the maximum height roughness Rz of the surface of the roll 4 is preferably 10 ⁇ m or more. When the maximum height roughness Rz of the roll surface is 10 ⁇ m or more, the stirring performance is enhanced, the effect of removing the vapor film on the surface of the metal plate 1 is enhanced, and a superior cooling effect is likely to be obtained.
  • the maximum height roughness Rz of the surface of the roll 4 is preferably 50 ⁇ m or less.
  • the maximum height roughness Rz of the roll surface is defined in JIS B 0601 (2001) and may be measured by the measurement method described in JIS B 0633.
  • the measuring method may be a stylus type or a non-contact type.
  • the hardening device 11 may include a control device (not shown) that controls the rotation speed and rotation direction of the rolls 4 (rolls 4a and 4b) as described above. Then, the rotation speed and rotation direction of the roll 4 may be controlled via the spindle 44 by controlling the output of the main motor 45 (see FIG. 3) that drives the roll 4 to rotate using the control device.
  • the roll diameter of the rolls 4 is preferably 50 mm or more. If the roll diameter is less than 50 mm, the reaction force from the metal plate 1 tends to bend the roll 4 . Moreover, it is preferable that the roll diameter of the roll 4 (roll 4a, roll 4b) is 250 mm or less. When the roll diameter is 250 mm or less, the stirring performance is enhanced, the effect of removing the vapor film on the surface of the metal plate 1 is enhanced, and a more excellent cooling effect is likely to be obtained.
  • the number of rolls to be arranged in the bath 5 is not limited, it is necessary to arrange at least one pair of rolls so as to sandwich the metal plate 1 therebetween. Furthermore, preferably, a plurality of rolls are arranged on each of the front side and the back side of the metal plate 1, so that the vapor film can be removed more uniformly and reliably, and a stable cooling performance can be obtained. . In order to obtain the same cooling capacity on the front and back surfaces of the metal plate 1, it is desirable to arrange the same number of rolls on the front surface side and the back surface side of the metal plate 1 and to arrange them in pairs. The number of rolls arranged is preferably three pairs or more.
  • the number of rolls arranged is three pairs or more, the vapor film on the surface of the metal plate 1 can be more uniformly and reliably removed, and stable cooling performance can be easily obtained.
  • the upper limit of the number of rolls 4 to be arranged is not particularly set, the number of rolls to be arranged is preferably 10 pairs or less. It is preferable from the viewpoint of cost that the number of rolls arranged is 10 pairs or less. Also, the rolls may or may not be in contact with each other.
  • the cooling medium liquid
  • the rolls is stirred by the rolls, thereby obtaining the effect of removing the vapor film on the surface of the metal plate and obtaining an excellent cooling effect on the metal plate. There is no need to install cooling water injection nozzles in the bath.
  • the material of the rolls 4 should be formed of a material having strength enough to withstand the reaction force of the metal plate 1.
  • a material having strength enough to withstand the reaction force of the metal plate 1. For example, SUS304, SUS310, ceramics, etc. are mentioned.
  • FIG. 2 is a diagram showing the state of the quenching device 11 under conditions in which quenching is not performed. 1 and 2 differ only in the state of the quenching device 11 (the state in which quenching is performed and the state in which quenching is not performed), and the basic configuration of the quenching device 11 is the same. The same reference numerals are attached to the components corresponding to , and detailed description thereof will be omitted.
  • the cooling medium (liquid (water)) 2 contained in the tank 5 in the state shown in FIG. 1 is removed, and the tank 5 is emptied.
  • the cooling medium contained in the tank 5 may be completely removed from the tank 5, or may remain in the tank 5 to such an extent that the metal plate 1 is not immersed.
  • the rolls 4 when quenching is not performed, the positions of the rolls 4 (rolls 4a and 4b) are positioned farther away from the metal plate 1 than when quenching is performed (in other words, the rolls 4a and roll 4b). That is, the roll 4 of this embodiment can change the distance from the metal plate 1 . Therefore, the roll 4 has a drive mechanism (motor) that moves the roll 4 to a position away from the metal plate 1 . Any method can be used as long as the roll 4 can be moved as described above, but an electric type is more preferable in consideration of responsiveness. As an example, FIG. 3 shows a moving mechanism for the rolls 4 (rolls 4a and 4b). FIG. 3(a) is a bird's-eye view of the moving mechanism from above, and FIG.
  • 3(b) is a side view of part of the moving mechanism.
  • a mechanism that changes the distance between the roll 4 (roll 4a, roll 4b) and the metal plate 1 by installing (an arm with a linear guide) 6 and moving the arm 6 in the horizontal direction by an electric jack 7 can be mentioned.
  • the roll 4 By installing the arm 6 on each of the rolls 4 (roll 4a, roll 4b) on the front side and the back side of the metal plate 1 and moving it in the horizontal direction, the roll 4 can be moved in the horizontal direction (roll 4a, roll 4b).
  • opening and closing of the interval between A seal mechanism 42 (mechanical seal) can be appropriately installed in the connection area between the rotating shaft 41 of the roll 4 and the tank 5 so that the cooling medium does not leak from the tank 5 .
  • the rolls 4 should be separated from the metal plate 1 in order to reduce heat radiation from the metal plate 1.
  • the distances between the rolls 4a and 4b and the metal plate 1 are preferably 200 mm or more.
  • the distance between the rolls 4a and 4b and the metal plate 1 is 200 mm or more in the horizontal direction.
  • the quenching apparatus 11 of the present embodiment performs the quenching conditions (FIG. 1) and the non-quenching conditions (FIG. 2). distance can be changed.
  • the rolls 4 are brought close to the metal plate 1, and the steam film on the metal plate 1 is removed by stirring with the rolls 4 to cool the metal plate 1, thereby ensuring a sufficient cooling capacity. Accordingly, in the present invention, installation of nozzles for cooling the metal plate 1 can be made unnecessary.
  • the roll 4 is moved away from the metal plate 1 to suppress thermal deformation of the roll 4 due to heat radiation from the metal plate 1, and consideration is given to installation of a reflector and deformation of the nozzle in the tank. no longer need to.
  • the metal plate 1 heated in a continuous annealing facility can be switched between quenching conditions and non-quenching conditions.
  • the furnace of the continuous annealing equipment is opened, and in order to prevent thermal deformation caused by heat radiation from the metal plate 1, members such as cooling water injection nozzles arranged in the tank of the quenching device are removed, There is no need to install a reflecting plate or the like for preventing thermal deformation in the tank, and the switching is easy. Therefore, both a metal plate that requires quenching and a metal plate that does not require quenching can be manufactured with a single quenching apparatus with high productivity.
  • the present invention is preferably applied to a method for manufacturing a steel plate.
  • the quenching apparatus of the present invention is installed on the delivery side of a soaking furnace of a continuous annealing facility through which steel sheets of different steel grades are continuously passed, it can be used more effectively. It is also possible to adjust the installation position of the rolls and the positional relationship with the metal plate running in the tank of the quenching device, and use the quenching device to correct the shape of the metal plate.
  • the above steel sheets include cold-rolled steel sheets, and surface-treated hot-dip galvanized steel sheets, electro-galvanized steel sheets, alloyed hot-dip galvanized steel sheets, and the like.
  • INDUSTRIAL APPLICABILITY The present invention is preferably applied to a method of manufacturing a cold-rolled steel sheet by quenching a cold-rolled steel sheet after annealing, and further to a method of manufacturing a plated steel sheet by plating the cold-rolled steel sheet.
  • the plating treatment one or more selected from an electrogalvanizing treatment, a hot-dip galvanizing treatment, an alloyed hot-dip galvanizing treatment, and the like can be mentioned.
  • the embodiment of the present invention is not limited to the example of manufacturing a steel plate, and can be applied to the manufacturing of metal plates in general other than steel plates.
  • the cooling device was changed after the high-strength steel sheet with a thickness of 0.8 to 2.3 mm was processed by the continuous annealing equipment.
  • a quenching device is installed on the exit side of the continuous annealing equipment, and after the high-tensile steel plate is annealed in the continuous annealing equipment, a steel plate (coil) with a target tensile strength of 780 MPa to 1470 MPa, An example of producing a steel plate (coil) with a tensile strength target of 340 MPa to 590 MPa using the same quenching apparatus is shown.
  • the quenching apparatus described in Patent Document 2 was installed on the delivery side of the continuous annealing equipment.
  • quenching water quenching
  • 200 coils with a target tensile strength target of 340 MPa to 590 MPa were produced.
  • water quenching was unnecessary, water was drained from the water tank of the quenching apparatus, and a reflecting plate for protection was installed on the water injection nozzle installed in the water tank.
  • ⁇ Comparative example> As a comparative example, the quenching device 11 described above (however, the rolls 4 (rolls 4a and 4b) were forcibly fixed so as not to rotate) was installed on the delivery side of the continuous annealing equipment. Rapid cooling (water quenching) is necessary to obtain the mechanical properties of the steel sheet with a tensile strength target of 780 MPa to 1470 MPa. Therefore, as shown in FIG. 1, water was put into the water tank 5 and cooling was performed without rotating the rolls 4 . At this time, the rolls 4 (rolls 4a and 4b) were positioned so as to be in contact with the steel plate running in the water tank 5 .
  • the quenching device 11 described above was installed on the delivery side of the continuous annealing facility. Rapid cooling (water quenching) is necessary to obtain the mechanical properties of the steel sheet with a tensile strength target of 780 MPa to 1470 MPa. Therefore, as shown in FIG. 1, water was put into the water tank 5 and the rolls 4 (rolls 4a and 4b) were rotated to cool the steel plate. At this time, the rolls 4 (rolls 4a and 4b) were positioned so as to be in contact with the steel plate running in the water tank 5 .
  • the maximum height roughness Rz of the surface of the roll 4 was set to 20 ⁇ m, and the roll diameter of the roll 4 was set to 150 mm.
  • Example 1 In Example 1, the rotation direction of the steel plate and the roll 4 (roll 4a, roll 4b) is the same, and the peripheral speed is 2.0 times the running speed of the steel plate (if the steel plate is 1000 mm / s, the roll peripheral speed is 2000 mm / s and the peripheral speed of the roll was 2.0 times relative to the running speed of the metal plate 1). Under these conditions, 200 coils with a tensile strength target of 780 MPa to 1470 MPa were produced, and an excellent cooling effect was obtained, and all the coils achieved the target strength. Subsequently, as shown in FIG.
  • the roll 4 (roll 4a, roll 4b) is horizontally separated from the steel plate by 500 mm, and with water removed from the water tank 5, a coil with a target tensile strength of 340 MPa to 590 MPa. 200 coils were produced. As a result, it was confirmed that there was no damage such as thermal deformation due to the heat effect from the steel plate, and that the target tensile strength was obtained.
  • Example 1 when switching between the conditions for performing quenching and the conditions for not performing quenching, the members in the water tank 5 of the quenching apparatus 11 were not removed, and no reflecting plate was installed in the water tank 5 . Therefore, the switching was easy, and both steel sheets requiring quenching and steel sheets not requiring quenching could be manufactured with high productivity with one quenching apparatus.
  • Example 2 In Example 2, the rotation directions of the steel plate and the roll 4 (roll 4a, roll 4b) were reversed, and the roll 4 was rotated at the same peripheral speed as the steel plate traveling speed (if the steel plate is 1000 mm / s, the roll peripheral speed 1000 mm/s, and the peripheral speed of the roll 4 is 2.0 times the relative speed of the running speed of the metal plate 1). Under these conditions, 200 coils with a tensile strength target of 780 MPa to 1470 MPa were produced, and an excellent cooling effect was obtained, and all the coils achieved the target strength. Subsequently, as shown in FIG.
  • the roll 4 (roll 4a, roll 4b) is horizontally separated from the steel plate by 500 mm, and with water removed from the water tank 5, a coil with a target tensile strength of 340 MPa to 590 MPa. 200 coils were produced. As a result, it was confirmed that there was no damage such as thermal deformation due to the heat effect from the steel plate, and that the target tensile strength was obtained.
  • Example 2 when switching between the conditions for performing quenching and the conditions for not performing quenching, the members in the water tank 5 of the quenching apparatus 11 were not removed, and no reflecting plate was installed in the water tank 5 . Therefore, the switching was easy, and both steel sheets requiring quenching and steel sheets not requiring quenching could be manufactured with high productivity with one quenching apparatus. This confirmed the effectiveness of the present invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
PCT/JP2022/021485 2021-07-30 2022-05-26 焼入れ装置、焼入れ方法、冷延鋼板の製造方法及びめっき鋼板の製造方法 WO2023007932A1 (ja)

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KR1020247001271A KR20240021278A (ko) 2021-07-30 2022-05-26 ??칭 장치, ??칭 방법, 냉연 강판의 제조 방법 및 도금 강판의 제조 방법
CN202280049238.6A CN117642517A (zh) 2021-07-30 2022-05-26 淬火装置、淬火方法、冷轧钢板的制造方法及镀覆钢板的制造方法
EP22849011.6A EP4345177A4 (en) 2021-07-30 2022-05-26 QUENCHING DEVICE, QUENCHING METHOD, METHOD FOR MANUFACTURING COLD-ROLLED STEEL SHEET, AND METHOD FOR MANUFACTURING PLATED STEEL SHEET
MX2024000939A MX2024000939A (es) 2021-07-30 2022-05-26 Aparato de enfriamiento, metodo para enfriar, metodo para fabricar chapa de acero laminada en frio y metodo para fabricar chapa de acero recubierta.
JP2022545354A JP7424499B2 (ja) 2021-07-30 2022-05-26 焼入れ装置、焼入れ方法、冷延鋼板の製造方法及びめっき鋼板の製造方法
US18/580,482 US20240318272A1 (en) 2021-07-30 2022-05-26 Quenching apparatus, method for quenching, method for manufacturing cold rolled steel sheet, and method for manufacturing coated steel sheet

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JP2021125060 2021-07-30

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS565932A (en) * 1979-06-29 1981-01-22 Nippon Kokan Kk <Nkk> Continuous annealing apparatus
JPS5794528A (en) * 1980-12-04 1982-06-12 Nippon Kokan Kk <Nkk> Continous annealing facility
JPS59153843A (ja) 1983-02-18 1984-09-01 Nippon Kokan Kk <Nkk> ストリップの冷却装置
JP2013185182A (ja) 2012-03-06 2013-09-19 Jfe Steel Corp 鋼帯の製造装置および鋼帯の製造方法
WO2017115742A1 (ja) * 2015-12-28 2017-07-06 Ｊｆｅスチール株式会社 急冷焼入れ装置及び急冷焼入れ方法
WO2021085335A1 (ja) * 2019-10-31 2021-05-06 Ｊｆｅスチール株式会社 鋼板、部材及びそれらの製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5937335B2 (ja) * 1979-06-28 1984-09-08 日本鋼管株式会社 連続焼鈍における鋼帯冷却装置
JP3299076B2 (ja) * 1995-04-28 2002-07-08 川崎製鉄株式会社 鋼板の冷却方法および装置
JP6308287B2 (ja) * 2015-12-28 2018-04-11 Ｊｆｅスチール株式会社 急冷焼入れ装置及び急冷焼入れ方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS565932A (en) * 1979-06-29 1981-01-22 Nippon Kokan Kk <Nkk> Continuous annealing apparatus
JPS5794528A (en) * 1980-12-04 1982-06-12 Nippon Kokan Kk <Nkk> Continous annealing facility
JPS59153843A (ja) 1983-02-18 1984-09-01 Nippon Kokan Kk <Nkk> ストリップの冷却装置
JP2013185182A (ja) 2012-03-06 2013-09-19 Jfe Steel Corp 鋼帯の製造装置および鋼帯の製造方法
WO2017115742A1 (ja) * 2015-12-28 2017-07-06 Ｊｆｅスチール株式会社 急冷焼入れ装置及び急冷焼入れ方法
WO2021085335A1 (ja) * 2019-10-31 2021-05-06 Ｊｆｅスチール株式会社 鋼板、部材及びそれらの製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4345177A4

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US20240318272A1 (en) 2024-09-26
MX2024000939A (es) 2024-02-08
CN117642517A (zh) 2024-03-01
EP4345177A4 (en) 2024-10-02
JPWO2023007932A1 (enrdf_load_stackoverflow) 2023-02-02
JP7424499B2 (ja) 2024-01-30
KR20240021278A (ko) 2024-02-16

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