EP3216881A1 - Procédé et dispositif de fabrication de tôle d'acier - Google Patents

Procédé et dispositif de fabrication de tôle d'acier Download PDF

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Publication number
EP3216881A1
EP3216881A1 EP15856843.6A EP15856843A EP3216881A1 EP 3216881 A1 EP3216881 A1 EP 3216881A1 EP 15856843 A EP15856843 A EP 15856843A EP 3216881 A1 EP3216881 A1 EP 3216881A1
Authority
EP
European Patent Office
Prior art keywords
strip
hot
width
cooling
hot strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15856843.6A
Other languages
German (de)
English (en)
Other versions
EP3216881A4 (fr
EP3216881B1 (fr
Inventor
Tooru Akashi
Masaki Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel and Sumitomo Metal Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel and Sumitomo Metal Corp filed Critical Nippon Steel and Sumitomo Metal Corp
Publication of EP3216881A1 publication Critical patent/EP3216881A1/fr
Publication of EP3216881A4 publication Critical patent/EP3216881A4/fr
Application granted granted Critical
Publication of EP3216881B1 publication Critical patent/EP3216881B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • 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
    • 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
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling

Definitions

  • the present invention relates to a method of manufacturing a strip and a device for manufacturing a strip.
  • strips have a strip thickness of 0.4 to 6 mm, and are used widely as materials of automobiles, electrical machines, construction materials, and the like.
  • a hot strip (a hot rolled coil) of a predetermined thickness is obtained by a hot rolling step of hot rolling a cast slab, and this hot strip (hot rolled coil) is shipped-out as is as a product, or there are those that are manufactured by further carrying out a cold rolling step or a heat treatment step on this hot strip (hot rolled coil).
  • the strip width of the hot strip is set to be wider than the strip width of the product, in consideration of the aforementioned fluctuations in the strip width.
  • strip width end portions are removed in an after-process.
  • the strip width is set to be wider than needed, the manufacturing yield deteriorates.
  • the strip width of the hot strip is set to be narrow in order to improve the manufacturing yield, there is the concern that the strip width will be insufficient at the final product due to fluctuations in the strip width.
  • JP-A Japanese Patent Application Laid-Open
  • H08-132104 Japanese Patent Application Laid-Open
  • JP-A No. 08-132104 by carrying out rolling by a flat roller and a rolling roller in which plural groove portions are formed and that has a convex and concave cross-sectional shape, a strip in which both plural unrolled portions and rolled portions exist in the strip width direction is obtained, and, by carrying out rolling by flat rollers on this strip, only the unrolled portions of the strip are rolled, and further, the entire width of the strip is rolled by using flat rollers.
  • JP-A No. H08-132104 because a rolling roller, in which plural groove portions are formed and that has a convex and concave cross-sectional shape, is used, there is the problem that costs are involved in maintaining the cross-sectional shape of the rolling roller. Further, it is difficult to accurately control the strip width over the entire length of the rolled material. Moreover, even in a case in which the strip width is enlarged by the above-described rolling, because there is the need to ensure a strip width at which a final product of a predetermined strip width can be obtained, the strip width after the enlargement is set in consideration of fluctuations in the strip width, and there is still the problem that the manufacturing yield deteriorates.
  • An object of embodiments of the present specification is to provide a method of manufacturing a strip and a device for manufacturing a strip that can manufacture a strip inexpensively and at a good yield.
  • a method of manufacturing a strip comprising a step of selectively enlarging a place, at which a strip width is smaller than a predetermined width, of a hot strip that is formed from a steel.
  • a device for manufacturing a strip comprising enlarging means for selectively enlarging a place, at which a strip width is smaller than a predetermined width, of a hot strip that is formed from a steel.
  • a method of manufacturing a strip comprising a step of selectively enlarging a place, at which a strip width is smaller than a predetermined width, of a hot strip that is formed from a steel.
  • a place, at which the strip width is smaller than a predetermined width, of the hot strip is selectively enlarged, the strip width of the hot strip that is needed in order to make the final product be a predetermined strip width can be set to be small.
  • an improvement in the manufacturing yield can be devised, and a strip can be manufactured inexpensively.
  • the strip thickness decreases in accordance with the enlarging of the strip width due to plastic strain.
  • fluctuations in the strip width, fluctuations in the strip thickness, and fluctuations in shape such as a wave shape (displacement in the strip thickness direction) and meandering (displacement in the strip width direction) and the like, can be corrected locally, and a strip having excellent accuracy of shape can be manufactured.
  • the hot strip may be wound by a coiler at a hot rolling line, and the place at which the strip width is smaller than the predetermined width may be a distal end portion of a hot strip at which the strip width has become small due to excessive tension that arises at a time when tension is initially applied by the coiler to the hot strip that is to be wound by the coiler.
  • the step of selectively enlarging the strip width of the place at which the strip width is smaller than the predetermined width may include a cooling step of cooling the place, at which the strip width is smaller than the predetermined width, of the hot strip in a state in which displacement of the hot strip in a strip thickness direction is restrained, at greater than or equal to a lower critical cooling speed at which martensitic transformation occurs, from an austenite temperature range at which single-phase austenite exists to less than a martensite transformation start temperature.
  • the austenite temperature range, the martensite transformation start temperature, and the lower critical cooling speed at which the martensitic transformation occurs are specified from the CCT diagram (continuous cooling transformation diagram) of the steel that structures the hot strip.
  • the hot strip is cooled at a cooling speed that is greater than or equal to the lower critical cooling speed at which martensitic transformation occurs, from the austenite temperature range at which single-phase austenite exists to less than the martensite transformation start temperature. Therefore, the austenite phase phase-transforms to the martensite phase, and transformation expansion arises due thereto. Because the hot strip is cooled in a state in which displacement in the strip thickness direction is restrained, plastic strain arises in the strip width direction due to the aforementioned transformation expansion, and the strip width of the hot strip can be enlarged. Accordingly, there is no need to make the strip width of the hot strip greater than needed in order to make the final product be a predetermined strip width, and an improvement in the manufacturing yield can be devised.
  • cooling step it is preferable for cooling to be carried out from the austenite temperature region, at which single-phase austenite exists, to less than the martensite transformation finish temperature, and it is preferable that the cooling speed be made to be greater than or equal to the upper critical cooling speed at which the entire hot strip becomes martensite.
  • the strip passing speed of the hot strip at a restraining/cooling device is V m/sec
  • cooling may be carried out at a cooling speed of greater than or equal to 140°C/sec in a state in which displacement of the hot strip in the strip thickness direction is restrained over greater than or equal to (5V/14) m in a length direction of the hot strip.
  • the method of manufacturing a strip of the embodiments of the present specification may be structured so as to have a finishing rolling step that manufactures the hot strip, and such that the temperature of the hot strip after this finishing rolling step is made to be in the austenite temperature range, and the cooling step is carried out in continuation with the finishing rolling step.
  • displacement of the hot strip in the strip thickness direction may be restrained by, in a state in which tension is applied to the hot strip in a length direction of the hot strip, protruding the place, at which the strip width is smaller than the predetermined width, of the hot strip toward at least one direction side in the strip thickness direction of the hot strip from a plane that is parallel to a strip passing direction of the hot strip, over a strip width of the hot strip.
  • a roller may be used as the member that protrudes the hot strip toward at least one direction side in the strip thickness direction of the hot strip from a plane that is parallel to a strip passing direction of the hot strip, over the strip width of the hot strip.
  • the method of manufacturing a strip of the embodiments of the present specification may further comprise a heating step of selectively heating the place, at which the strip width is smaller than the predetermined width, of the hot strip until the austenite temperature range, wherein the cooling step may be carried out in continuation with the heating step.
  • the method has the heating step that heats the hot strip to the austenite temperature range, the temperature of the hot strip before cooling can be set relatively freely, and the conditions of the cooling step can be optimized, and fluctuations in the strip width, fluctuations in the strip thickness, and fluctuations in the shape such as a wave shape, meandering and the like can be corrected precisely.
  • the cooling step may be carried out repeatedly a plurality of times.
  • the plastic strain in the strip width direction becomes large, and the strip width can be enlarged further.
  • the strip thickness also decreases accompanying the enlargement of the strip width, fluctuations in the strip width, fluctuations in strip thickness, and fluctuations in the shape such as a wave shape, meandering and the like can be reliably corrected by utilizing this enlargement in the strip width and decrease in the strip thickness.
  • the method of manufacturing a strip of the embodiments of the present specification may further comprise a step of, in a length direction of the hot strip, measuring a strip width.
  • a device for manufacturing a strip comprising enlarging means for selectively enlarging a place, at which a strip width is smaller than a predetermined width, of a hot strip that is formed from a steel.
  • the strip thickness decreases in accordance with the enlarging of the strip width due to plastic strain.
  • the hot strip may be wound by a coiler at a hot rolling line, and the place at which the strip width is smaller than the predetermined width may be a distal end portion of a hot strip at which the strip width has become small due to excessive tension that arises at a time when tension is initially applied by the coiler to the hot strip that is to be wound by the coiler.
  • the enlarging means of the device for manufacturing a strip includes the restraining means for restraining deformation of the hot strip in the strip thickness direction, the cooling means for cooling the hot strip, and the control means for controlling the restraining means and the cooling means.
  • the restraining means and the cooling means are controlled such that cooling is carried out in a state in which displacement of the hot strip in the strip thickness direction is restrained, at greater than or equal to a lower critical cooling speed at which martensitic transformation occurs, from the austenite temperature range single-phase austenite exists to less than the martensite transformation start temperature. Therefore, plastic strain can be brought about in the strip width direction at the hot strip, and the strip width can be enlarged. Further, by utilizing the aforementioned plastic strain, fluctuations in the strip width, fluctuations in the strip thickness, and fluctuations in shape such as a wave shape, meandering and the like can be corrected.
  • the device for manufacturing a strip of the embodiments of the present specification may further include strip width measuring means for measuring a strip width of the hot strip in the length direction of the hot strip, wherein, on the basis of data relating to the strip width in the length direction of the hot strip from the strip width measuring means, the control means may control the restraining means and the cooling means to carry out the cooling.
  • the strip width can be enlarged locally, and the strip can be manufactured at a good yield.
  • the device for manufacturing a strip of the embodiments of the present specification may comprise restraining means for restraining deformation of the hot strip in the strip thickness direction, cooling means for cooling the hot strip, control means for controlling the restraining means and the cooling means, and shape measuring means for measuring, in a length direction of the hot strip, at least one sheet shape information selected from strip width, strip thickness, a wave shape and an amount of meandering, wherein the control means may control the restraining means and the cooling means on the basis of the measured data measured by the shape measuring means, and may carry out cooling of the hot strip.
  • the strip width is enlarged, the strip thickness is decreased, the strip width, the strip thickness, the wave shape, and the amount of meandering can be corrected locally, and a high-quality strip can be manufactured at a good yield.
  • the device for manufacturing a strip of the embodiments of the present specification may further comprise heating means for heating the hot strip to the austenite temperature range, wherein the control means is control means that also controls the heating means, and, on the basis of data relating to the strip width in the length direction of the hot strip, the control means may control the restraining means and the cooling means and the heating means so as to selectively heat the place, at which the strip width is smaller than the predetermined width, of the hot strip to the austenite temperature range, and to carry out the cooling in continuation with the heating.
  • the control means is control means that also controls the heating means, and, on the basis of data relating to the strip width in the length direction of the hot strip, the control means may control the restraining means and the cooling means and the heating means so as to selectively heat the place, at which the strip width is smaller than the predetermined width, of the hot strip to the austenite temperature range, and to carry out the cooling in continuation with the heating.
  • the temperature of the hot strip before cooling can be set relatively freely by the heating means, and the conditions of the cooling can be optimized, and fluctuations in the strip width, fluctuations in the strip thickness, and fluctuations in the shape such as a wave shape, meandering and the like can be corrected precisely.
  • the restraining means may include: tension applying means for applying tension to the hot strip in the length direction of the hot strip; and protruding means for protruding the hot strip toward at least one direction side in the strip thickness direction of the hot strip from a plane that is parallel to a strip passing direction of the hot strip, over a strip width of the hot strip.
  • a roller may be used as a protruding member that protrudes the hot strip toward at least one direction side in the strip thickness direction of the hot strip from a plane that is parallel to the strip passing direction of the hot strip, over the strip width of the hot strip.
  • the protruding means may be a roller having an internal cooling mechanism.
  • the hot strip can be cooled, and can be reliably cooled at greater than or equal to the cooling speed at which the martensitic transformation occurs.
  • the rollers may be structured so as to be disposed alternately in the strip passing direction at the one surface and the other surface of the hot strip.
  • displacement in the strip thickness direction can be reliably suppressed by the rollers that are disposed alternately in the strip passing direction at the one surface and the other surface of the hot strip, and plastic strain in the strip width direction can be reliably brought about due to transformation expansion.
  • the rollers have a large diameter roller and presser rollers that are positioned at strip passing direction both sides of the large diameter roller, and displacement of the hot strip in the strip thickness direction is restrained due to the hot strip being pressed-against the outer peripheral surface of the large diameter roller by the presser rollers.
  • displacement of the hot strip in the strip thickness direction can be suppressed due to the hot strip being pressed-against the outer peripheral surface of the large diameter roller so as to run therealong by the presser rollers that are positioned at the strip passing direction both sides of the large diameter roller. Accordingly, plastic strain can be reliably brought about in the strip width direction by the transformation expansion.
  • the roller may have projections at the roller surface.
  • the contact of the hot strip with the roller is made uniform, and displacement of the hot strip in the strip thickness direction can be suppressed reliably.
  • a strip which is formed from carbon steel and that phase-transforms from the austenite phase to the martensite phase in a cooling step, is manufactured.
  • a strip strip thickness: 0.4 to 6 mm
  • a hot strip 5 that is manufactured by using the hot rolling line shown in Fig. 1 .
  • a hot rolling line 10 shown in Fig. 1 has a heating furnace 11 that heats a slab 1, a roughing mill 12 that rough-rolls the heated slab 1 and makes it into a rough-rolled material 3, a finishing mill 13 that rolls the rough-rolled material 3 and manufactures the hot strip 5 that has a predetermined thickness (in the present embodiment, 1.2 to 6 mm), and a cooling device 14 that cools the hot strip 5 after the finishing rolling to a predetermined temperature.
  • a first coiler 15 is disposed at the stage before the cooling device 14, and a second coiler 16 is disposed at the stage after the cooling device 14, respectively.
  • the finishing mill 13 has plural rolling stands 13a.
  • a strip width meter 17, which measures the strip width of the hot strip 5, and a thermometer 18, which measures the temperature of the hot strip 5, are disposed at the exit side of the finishing mill 13.
  • Strip width data and temperature data that are measured by the strip width meter 17 and the thermometer 18 are transferred to a computer 19. Due thereto, strip width data per longitudinal direction position of the hot strip 5 is stored in the computer 19.
  • the hot strip 5 that is manufactured at this hot rolling line 10 is wound by the first coiler 15 after the rolling at the finishing mill 13, or is wound by the second coiler 16 after being cooled to a predetermined temperature by the cooling device 14.
  • the hot strip 5 that is wound by the first coiler 15 or the second coiler 16 in this way (the hot rolled coil) is conveyed to a restraining/cooling device 20 shown in Fig. 2 by a coil car (not illustrated) or a crane (not illustrated) or the like.
  • the restraining/cooling device 20 has an uncoiler 21 to which the coil of the hot strip 5 is mounted, a heating section 22 that heats the hot strip 5, a restraining/cooling section 30 that restrains and cools the heated hot strip 5, and a coiler 23 that winds-up the hot strip 5 that has been restrained and cooled.
  • this is a structure in which the hot strip 5 is conveyed to the heating section 22 and the restraining/cooling section 30 by the coiler 23 and the uncoiler 21.
  • Tension is applied to the hot strip 5 in a length direction 51 of the hot strip 5 by the coiler 23 and the uncoiler 21.
  • the coiler 23 and the uncoiler 21 are examples of the tension applying means.
  • the hot strip 5 is conveyed in a strip passing direction 52 by the coiler 23 and the uncoiler 21.
  • thermometers 26a, 26b are disposed at the entrance side and the exit side of the heating section 22, and a strip width meter 27 and a thermometer 28 are disposed at the exit side of the restraining/cooling section 30.
  • the restraining/cooling section 30 has restraining rollers 31 that restrain displacement of the hot strip 5 in the strip thickness direction, and cooling members 37 that cool the hot strip 5 that is restrained.
  • the restraining rollers 31 have a large diameter roller 32, and presser rollers 35 that are positioned at the strip passing direction both sides of this large diameter roller 32.
  • Tension is applied to the hot strip 5 in the length direction 51 of the hot strip 5 by the coiler 23 and the uncoiler 21.
  • displacement of the hot strip 5 in the strip thickness direction is restrained over the strip width of the hot strip 5, due to the hot strip 5 being protruded by the large diameter roller 32 toward a one direction (in the present embodiment, the upper surface direction of the hot strip 5 (the upper side direction in the drawing)) side in a strip thickness direction 53 of the hot strip 5 from a plane that is parallel to the strip passing direction 52 of the hot strip 5.
  • the large diameter roller 32 is an example of the protruding means.
  • an internal cooling mechanism 33 is provided at the large diameter roller 32, and there is a structure in which a coolant (cooling water in the present embodiment) is sprayed onto the hot strip 5 that is pressed-against the outer peripheral surface, and the hot strip 5 can be cooled.
  • a coolant cooling water in the present embodiment
  • plural projections are formed at the outer peripheral surface of the large diameter roller 32 in order to make the contact with the hot strip 5 uniform.
  • a plurality of the cooling members 37 are disposed at the outer peripheral side of the large diameter roller 32, and have cooling nozzles that spray a coolant (cooling water in the present embodiment) onto the hot strip 5 that is pressed-against the large diameter roller 32.
  • the restraining/cooling device 20 of the present embodiment has a control section 24 that controls operations of the uncoiler 21, the coiler 23, the heating section 22, the restraining rollers 31 and the cooling means 37, and adjusts the conveying speed of the hot strip 5, the state of heating by the heating section 22, and the state of restraining and the state of cooling at the restraining/cooling section 30.
  • This control section 24 is structured so as to control the operations of the uncoiler 21, the coiler 23, the heating section 22, the restraining rollers 31 and the cooling means 37 on the basis of strip width data per length direction position of the hot strip 5 that is stored in the computer 19 of the above-described hot rolling line 10.
  • a method of manufacturing a strip which is the present embodiment and which uses the above-described hot rolling line 10 and restraining/cooling device 20, is described next.
  • the strip that is manufactured in the present embodiment is structured by carbon steel that phase-transforms from the austenite phase to the martensite phase.
  • Fig. 4 shows an example of a continuous cooling transformation diagram (CCT diagram) of carbon steel that structures the strip (the hot strip 5) in the present embodiment.
  • CCT diagram continuous cooling transformation diagram
  • the austenite temperature region in which single-phase austenite exists is greater than or equal to 800°C.
  • the martensite transformation start temperature (Ms point) is 220°C.
  • the austenite temperature region, the martensite transformation start temperature (Ms point), the martensite transformation finish temperature (Mf point), the lower critical cooling speed and the upper critical cooling speed differ in accordance with the component composition of the steel that structures the strip that is to be manufactured. Therefore, the cooling temperature band and the cooling speed in the restraining/cooling treatment of the hot strip 5 are set on the basis of the CCT diagram and in accordance with the component composition of the steel that structures the strip that is to be manufactured.
  • the hot strip 5 of a predetermined thickness is obtained by the finishing mill 13 of the hot rolling line 10.
  • the strip width and temperature are measured per length direction position of the hot strip 5 by the strip width meter 17 and the thermometer 18 that are set at the exit side of the finishing mill 13, and these results of measurement are transferred to the computer 19.
  • the computer 19 computes the strip width per length direction position of the hot strip 5, and specifies the length direction positions of the hot strip 5 at which the strip width is insufficient with respect to the target strip width size of the product (hereinafter called insufficient strip width positions), and the amounts of insufficiency of the strip width.
  • the hot strip 5 that has been rolled at the finishing mill 13 is wound onto and is made into a rolled coil at the first coiler 15 or, after having passed-through the cooling device 14, the second coiler 16, and is conveyed by a coil car (not illustrated) or a crane (not illustrated) or the like, and is mounted to the uncoiler 21 of the restraining/cooling device 20 shown in Fig. 2 .
  • the hot rolled coil that is mounted to the uncoiler 21 is unrolled, and is conveyed to the heating section 22 of the restraining/cooling device 20.
  • the control section 24 operates the heating section 22, and locally (selectively) heats the insufficient strip width position of the hot strip 5.
  • the heating temperature is in the austenite temperature region, and, in the present embodiment, is set to greater than or equal to 800°C and less than or equal to 950°C. Note that, in the present embodiment, because the thermometer 26a is disposed at the entrance side of the heating section 22, heating is carried out on the basis of this temperature data such that the temperature of the insufficient strip width position becomes greater than or equal to 800°C and less than or equal to 950°C.
  • the hot strip 5 that has passed-through the heating section 22 is conveyed to the restraining/cooling section 30.
  • the control section 24 gives commands to the restraining rollers 31 and the cooling means 37 to execute restraining/cooling treatment of the hot strip 5.
  • the hot strip 5 is pressed-against the surface of the large diameter roller 32 by the presser rollers 35 and is set in a state in which displacement of the hot strip 5 in the strip thickness direction is suppressed, and cooling of the hot strip 5 is carried out by the cooling means 37 and the internal cooling mechanism 33 of the large diameter roller 32.
  • the contact length of the hot strip 5 with the large diameter roller 32 be greater than or equal to (5V/14)m (where V is the strip passing speed (m/sec) of the hot strip at the restraining/cooling device 20).
  • the martensitic transformation starts at the point in time when the temperature of the hot strip 5 becomes the MS point, and ends at the point in time when the temperature of the hot strip 5 becomes the MF point.
  • the difference between the MS point and the MF point is usually around 50°C, and the cooling speed during this time is desirably greater than or equal to 140°C/sec as shown in Fig. 4 .
  • plastic strain arises in the strip width direction due to the transformation expansion at the time when the austenite phase transforms to the martensite phase, and the strip width of the hot strip 5 can be enlarged.
  • the strip width of the insufficient strip width position of the hot strip 5 can be enlarged selectively.
  • the cooling speed is made to be greater than or equal to the lower critical cooling speed at which the martensitic transformation occurs, and, in the present embodiment, is greater than or equal to 25°C/sec., and is preferably in a range of greater than or equal to 25°C/sec. and less than 250°C/sec.
  • the reason for less than 250°C/sec. is because it is difficult to make the cooling speed be a cooling speed of greater than or equal to that when carrying out water cooling.
  • the cooling speed at the cooling means 37 is preferably made to be greater than or equal to the upper critical cooling speed (greater than or equal to 140°C/sec in Fig. 4 ) at which the entire hot strip 5 becomes a martensite structure.
  • the hot strip 5 that has passed-through the restraining/cooling section 30 is wound-up by the coiler 23.
  • the strip width and temperature per length direction position of the hot strip 5 are measured by the strip width meter 27 and the thermometer 28 that are set at the exit side of the restraining/cooling section 30, and these results of measurement are transferred to a computer 29.
  • the computer 29 calculates the strip width per length direction position of the hot strip 5, and judges whether or not there are places where the strip width is insufficient with respect to the target strip width size of the product, and, in a case in which the strip width is insufficient, specifies the length direction position of the hot strip 5 at which the strip width is insufficient (the insufficient strip width position) and the amount of insufficiency of the strip width.
  • the hot rolled coil that was wound on the coiler 23 is again mounted to the uncoiler 21, and the above-described restraining/cooling treatment is executed repeatedly plural times until a predetermined strip width is obtained at the entire length of the hot strip 5.
  • the hot strip 5 is cooled at a cooling speed (greater than or equal to 25°C/sec. in the present embodiment) that is greater than or equal to the lower critical cooling speed at which the martensitic transformation occurs. Therefore, in the cooling step, transformation expansion occurs due to the austenite phase phase-transforming to the martensite phase.
  • the strip widths of the insufficient strip width positions of the hot strip 5 can be enlarged selectively, and, as a result, the strip can be manufactured inexpensively.
  • the hot strip 5 is wound by the coiler 15 or the coiler 16 at the hot rolling line 10 shown in Fig. 1 . It is easy for insufficiency in the strip width to arise at the hot strip distal end portions due to excessive tension that arises at the time when tension is first applied by the coiler 15 or the coiler 16 to the hot strip 5 that is to be wound by the coiler 15 or the coiler 16. Therefore, it is preferable to selectively restrain/cool at least the insufficient strip width positions that arise in this way.
  • the hot strip 5 is heated in the austenite temperature range (greater than or equal to 800°C and less than or equal to 950°C) by the heating section 22 of the restraining/cooling device 20. Therefore, the conditions of the restraining/cooling treatment can be optimized, and the strip width can be corrected precisely. Further, if the insufficient strip width positions of the hot strip 5 are heated selectively, the strip can be manufactured inexpensively.
  • the method of manufacturing a strip and the restraining/cooling device 20 of the present embodiment there is a structure in which the measured data of the strip width meter 17 and the thermometer 18 that are disposed at the exit side of the finishing mill 13 are transferred to the computer 19, and, at the computer 19, due to the measured strip width data being corrected by the temperature data, the insufficient strip width positions of the hot strip 5 and the amounts of insufficiency of the strip width are specified, and, at the restraining/cooling device 20, these insufficient strip width positions are heated and restrained/cooled. Therefore, at the insufficient strip width positions of the hot strip 5, the strip width can be reliably enlarged, and the strip width of the hot strip 5 that is needed in order to make the final product be a predetermined strip width can be made to be small.
  • the strip width and the temperature are measured per length direction position of the hot strip 5 by the strip width meter 27 and the thermometer 28 that are set at the exit side of the restraining/cooling section 30, and the strip width per length direction position of the hot strip 5 is computed from these measured data, and, in a case in which there is a place at which the strip width is insufficient with respect to the target strip width size of the product, the restraining/cooling treatment is repeatedly executed plural times. Therefore, a predetermined strip width can be obtained at the entire length of the hot strip 5, and the strip width of the hot strip 5 that is needed in order to make the final product be a predetermined strip width can be made to be even smaller.
  • the restraining rollers 31 that are provided at the restraining/cooling section 30 are structured by the large diameter roller 32, and the presser rollers 35 that are positioned at the strip passing direction both sides of the large diameter roller 32. Therefore, due to the hot strip 5 being pressed-against the outer peripheral surface of the large diameter roller 32 so as to run therealong by the presser rollers 35 that are positioned at the strip passing direction both sides of the large diameter roller 32, displacement of the hot strip 5 in the strip thickness direction can be suppressed, and plastic strain is reliably brought about in the strip width direction due to the transformation expansion, and the strip width can be enlarged.
  • the hot strip 5 which is pressed-against the outer peripheral surface of the large diameter roller 32 so as to run therealong, can be heated at greater than or equal to the lower critical cooling speed at which the martensitic transformation occurs, and plastic strain is reliably brought about in the strip width direction by the transformation expansion, and the strip width can be enlarged.
  • the plural projections are formed at the outer peripheral surface of the large diameter roller 32, contact of the large diameter roller 32 and the hot strip 5 is made uniform, and displacement of the hot strip 5 in the strip thickness direction can be reliably suppressed.
  • a method of manufacturing a strip and a restraining/cooling device that are a second embodiment are described next.
  • the method of manufacturing a strip that is the second embodiment manufactures a strip that is formed from carbon steel that phase-transforms from the austenite phase to the martensite phase in a cooling step.
  • a strip strip thickness: 0.4 to 6 mm
  • a hot rolling line 110 shown in Fig. 5 .
  • the hot rolling line 110 shown in Fig. 5 has a heating furnace 111 that heats the slab 1, a roughing mill 112 that rough-rolls the heated slab 1 and makes it into the rough-rolled material 3, a finishing mill 113 that rolls the rough-rolled material 3 and manufactures the hot strip 5 that has a predetermined thickness (in the present embodiment, 1.2 to 6 mm), a restraining/cooling device 120 that carries out restraining/cooling treatment on the hot strip 5 after the finishing rolling, and a coiler 116 that is disposed at the stage after the restraining/cooling device 120.
  • a heating furnace 111 that heats the slab 1
  • a roughing mill 112 that rough-rolls the heated slab 1 and makes it into the rough-rolled material 3
  • a finishing mill 113 that rolls the rough-rolled material 3 and manufactures the hot strip 5 that has a predetermined thickness (in the present embodiment, 1.2 to 6 mm)
  • a restraining/cooling device 120 that carries out re
  • the restraining/cooling device 120 has restraining rollers 131 that suppress displacement of the hot strip 5 in the strip thickness direction, and cooling means 137 that cool the hot strip 5.
  • the restraining rollers 131 are disposed alternately in the strip passing direction at the one surface and the other surface of the hot strip 5, and are disposed in a so-called staggered form.
  • the cooling means 137 is cooling nozzles that are disposed between the restraining rollers 131, and cools the hot strip 5 by spraying a coolant (cooling water in the present embodiment) onto the hot strip 5.
  • a method of manufacturing a strip which is the present embodiment and that uses the hot rolling line 110 and the restraining/cooling device 120 that have the above-described structures, is described next.
  • the strip that is manufactured in the present embodiment is structured from carbon steel that phase-transforms from the austenite phase to the martensite phase, and has the continuous cooling transformation diagram (CCT diagram) shown in Fig. 4 .
  • the hot strip 5 of a predetermined thickness is obtained by finishing rolling by the finishing mill 113 of the hot rolling line 110.
  • the temperature of the hot strip 5 that is conveyed-out from the finishing mill 113 is in the austenite temperature range at which single-phase austenite exists (in the present embodiment, greater than or equal to 800°C and less than or equal to 950°C).
  • the hot strip 5 that has been rolled at the finishing mill 113 is conveyed to the restraining/cooling device 120.
  • the restraining/cooling device 120 due to the one surface and the other surface of the hot strip 5 that is passing-through being supported by the restraining rollers 131, there is a state in which displacement of the hot strip 5 in the strip thickness direction is suppressed, and cooling of the hot strip 5 by the cooling means 137 is carried out. In this case, displacement of the strip (the hot strip 5) in the strip thickness direction from the first restraining roller 131 to the last restraining roller 131 is restrained.
  • the cooling speed of the hot strip 5 is made to be greater than or equal to the lower critical cooling speed at which the martensitic transformation occurs, and, in the present embodiment, is greater than or equal to 25°C/sec., and is preferably in a range of greater than or equal to 25°C/sec. and less than 250°C/sec..
  • the reason for less than 250°C/sec is because it is difficult to make the cooling speed be a cooling speed of greater than or equal to that when carrying out water cooling.
  • the cooling speed at the cooling means 137 be made to be greater than or equal to the upper critical cooling speed at which the entire hot strip 5 becomes a martensite structure.
  • the hot strip 5 that has passed-through the restraining/cooling device 120 is wound-up by the coiler 116.
  • a state is set in which displacement of the hot strip 5 in the strip thickness direction is restrained, and cooling is carried out at a cooling speed (greater than or equal to 25°C/sec. in the present embodiment) that is greater than or equal to the lower critical cooling speed at which the martensitic transformation occurs. Therefore, plastic strain is brought about in the strip width direction due to the transformation expansion that accompanies the transformation to the martensite phase, and the strip width of the hot strip 5 can be enlarged.
  • the strip width can be enlarged over the entire length of the hot strip 5.
  • the temperature of the hot strip 5 that has been rolled by the finishing mill 113 is made to be in the austenite temperature range (in the present embodiment, greater than or equal to 800°C and less than or equal to 950°C), and the restraining/cooling treatment is carried out by the restraining/cooling device 120 that is set at the stage after the finishing mill 113 of the heat rolling line 110. Therefore, there is no need to re-heat the hot strip 5, and reduction in the amount of energy that is consumed can be devised, and the manufacturing cost of the strip can be reduced. Further, because the finishing rolling step and the restraining/cooling treatment are carried out in continuation, the production efficiency can be improved.
  • the object being carbon steel that has the continuous cooling transformation diagram (CCT diagram) shown in Fig. 4 , but embodiments of the present specification is not limited to this, and the object may be another steel that phase-transforms from the austenite phase to the martensite phase.
  • CCT diagram continuous cooling transformation diagram
  • the austenite temperature range the martensite transformation start temperature (Ms), the martensite transformation finish temperature (Mf), the lower critical cooling speed at which the martensitic transformation occurs, the upper critical cooling speed at which the entire hot strip 5 becomes a martensite structure, and the like, and to prescribe the cooling start temperature, the cooling end temperature and the cooling speed of the hot strip, by using the continuous cooling transformation diagram (CCT diagram) of the steel that is the object.
  • Ms martensite transformation start temperature
  • Mf martensite transformation finish temperature
  • CCT diagram continuous cooling transformation diagram
  • embodiments of the present specification is not limited to this, and may be structured such that a hot strip is manufactured by using a hot rolling line of another structure, and restraining/cooling treatment is carried out on this hot strip.
  • S45 (C: 0.45 mass%, Mn: 0.5 mass%, P: 0.025 mass%, S: 0.025 mass%) was used as the type of steel. Note that the austenite temperature range of this S45 is greater than or equal to 900°C, the martensite transformation start temperature (Ms) is 420°C, and the martensite transformation finish temperature (Mf) is 270°C. Further, the lower critical cooling speed at which the martensitic transformation occurs is 100°C/sec., and the upper critical cooling speed at which the entire hot strip becomes a martensite structure is 250°C/sec.
  • a hot strip of a size of a strip thickness of 1.2 to 6 mm and a strip width of 550 to 2500 mm was manufactured at a strip passing speed of 100 to 1200 mpm, and the relationship between the strip thickness and the enlargement ratio of the strip width due to the restraining/cooling treatment was confirmed.
  • the contact length of the hot strip 5 with the large diameter roller in this case was made to be 8 m.
  • the enlargement ratio of the strip width was determined by (amount of enlargement of strip width) / (strip width before restraining/cooling treatment). The results are shown in Fig. 7 .
  • the strip width was enlarged in a range of 0.3 to 0.5%.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Control Of Metal Rolling (AREA)
EP15856843.6A 2014-11-05 2015-10-22 Procédé et dispositif de fabrication de tôle d'acier Active EP3216881B1 (fr)

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PCT/JP2015/079873 WO2016072285A1 (fr) 2014-11-05 2015-10-22 Procédé et dispositif de fabrication de tôle d'acier

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111167866A (zh) * 2020-01-04 2020-05-19 鞍钢股份有限公司 一种厚规格x80m级别管线弯管用钢板硬度控制方法
WO2020160898A1 (fr) * 2019-02-07 2020-08-13 thyssenkrupp Hohenlimburg GmbH Procédé de production d'une pièce à usiner en métal

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Publication number Priority date Publication date Assignee Title
JP7052512B2 (ja) * 2018-04-13 2022-04-12 日本製鉄株式会社 熱処理鋼板の製造方法及び鋼板冷却装置

Family Cites Families (7)

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JPS60221101A (ja) * 1984-04-17 1985-11-05 Hitachi Ltd 薄板材の板幅調整方法及び装置
JPS629711A (ja) * 1985-07-09 1987-01-17 Kawasaki Steel Corp 薄板熱間圧延ラインの板幅制御方法
ATE133591T1 (de) * 1988-12-22 1996-02-15 Preussag Stahl Ag Verfahren und vorrichtung zum regeln der bandbreite beim warmbandwalzen
JP2713012B2 (ja) * 1992-03-26 1998-02-16 日本鋼管株式会社 金属帯のロール冷却方法
JP3709028B2 (ja) * 1996-11-11 2005-10-19 新日本製鐵株式会社 冷間タンデム圧延方法および冷間タンデム圧延機
JPH10263671A (ja) * 1997-03-25 1998-10-06 Sumitomo Metal Ind Ltd 熱間圧延鋼板の冷却方法
JP3193343B2 (ja) * 1998-06-08 2001-07-30 川崎製鉄株式会社 ストリップの巻取方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020160898A1 (fr) * 2019-02-07 2020-08-13 thyssenkrupp Hohenlimburg GmbH Procédé de production d'une pièce à usiner en métal
CN111167866A (zh) * 2020-01-04 2020-05-19 鞍钢股份有限公司 一种厚规格x80m级别管线弯管用钢板硬度控制方法

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EP3216881A4 (fr) 2018-07-11
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JPWO2016072285A1 (ja) 2017-09-21
JP6237928B2 (ja) 2017-11-29

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