WO2022230229A1 - 冷延鋼板の製造方法及び製造設備 - Google Patents
冷延鋼板の製造方法及び製造設備 Download PDFInfo
- Publication number
- WO2022230229A1 WO2022230229A1 PCT/JP2021/046317 JP2021046317W WO2022230229A1 WO 2022230229 A1 WO2022230229 A1 WO 2022230229A1 JP 2021046317 W JP2021046317 W JP 2021046317W WO 2022230229 A1 WO2022230229 A1 WO 2022230229A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heating device
- steel sheet
- steel plate
- cold
- edge
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 272
- 239000010959 steel Substances 0.000 claims abstract description 272
- 238000010438 heat treatment Methods 0.000 claims abstract description 188
- 238000005096 rolling process Methods 0.000 claims abstract description 85
- 238000005097 cold rolling Methods 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 13
- 230000006698 induction Effects 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 description 44
- 229910000976 Electrical steel Inorganic materials 0.000 description 32
- 238000002474 experimental method Methods 0.000 description 17
- 238000005452 bending Methods 0.000 description 11
- 238000005336 cracking Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 230000007613 environmental effect Effects 0.000 description 7
- 230000001629 suppression Effects 0.000 description 7
- 238000005304 joining Methods 0.000 description 6
- 239000002436 steel type Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000137 annealing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Images
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
- B21B1/28—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 cold-rolling, e.g. Steckel cold mill
-
- 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
- B21B45/004—Heating the product
-
- 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
-
- 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
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
-
- 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
-
- 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
- B21B2001/221—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 by cold-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
- B21B2261/21—Temperature profile
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- the present invention relates to a method and equipment for manufacturing cold-rolled steel sheets.
- Patent Literature 1 describes a method of heating the width direction end portion of a steel sheet so as to reach a designated target temperature on the entry side of the rolling mill.
- Patent Document 2 describes a method of uniformly heating and rolling a steel plate over its entire area.
- the present invention has been made in view of the above problems, and an object thereof is to provide a cold-rolled steel sheet manufacturing method and manufacturing equipment capable of stably rolling a silicon steel sheet with low environmental load. .
- the inventors of the present invention conducted extensive research and found that the fracture suppression temperature (steel plate temperature at which the fracture suppression effect is high) is higher at the widthwise ends than at the widthwise central portion. I found out. Therefore, the inventors combined a full-width heating device that heats the entire width of the steel plate and an edge heating device that heats the ends of the steel plate in the width direction, and appropriately control the outputs of both.
- the fracture suppression temperature steel plate temperature at which the fracture suppression effect is high
- a method for manufacturing a cold-rolled steel sheet according to the present invention includes a full width heating device that heats the steel plate over the entire width direction of the steel plate, an edge portion heating device that heats the width direction end portion of the steel plate, the full width heating device, and A method for manufacturing a cold-rolled steel sheet using a cold rolling mill that rolls the steel sheet, which is arranged on the downstream side in the rolling direction with respect to the edge heating device, wherein at the entry side of the cold rolling mill The method includes heating the steel sheet using the full-width heating device and the edge heating device such that the temperature of the widthwise end portions of the steel plate is higher than the temperature of the widthwise center portion of the steel plate.
- the temperatures of the widthwise central portion and the widthwise end portions of the steel sheet on the entrance side of the cold rolling mill change according to the Si content of the steel sheet.
- the temperatures of the widthwise central portion and the widthwise end portions of the steel sheet on the entry side of the cold rolling mill be the temperatures calculated by the following formulas (1) and (2) that vary depending on the Si content ⁇ .
- a full width heating step of heating the steel plate over the entire width direction of the steel plate by the full width heating device, an edge portion heating step of heating the width direction end portion of the steel plate by the edge portion heating device, and a steel plate by the cold rolling mill and a rolling step of rolling are preferably performed in this order.
- An edge heating step of heating the ends of the steel plate in the width direction by the edge heating device, a full width heating step of heating the steel plate over the entire width direction of the steel plate by the full width heating device, and a steel plate by the cold rolling mill. and a rolling step of rolling are preferably performed in this order.
- the cold-rolled steel sheet manufacturing equipment includes a full width heating device that heats the steel plate over the entire width direction of the steel plate, an edge portion heating device that heats the width direction end portion of the steel plate, the full width heating device, and and a cold rolling mill for rolling the steel sheet, which is arranged downstream in the rolling direction with respect to the edge heating device, wherein the full width heating device and the edge heating device are located on the entry side of the cold rolling mill.
- the steel plate is heated so that the temperature of the widthwise end portions of the steel plate is higher than the temperature of the widthwise central portion of the steel plate.
- the full-width heating device and the edge heating device change the temperature of the widthwise central portion and the widthwise end portions of the steel sheet on the entry side of the cold rolling mill according to the Si content of the steel sheet.
- the full width heating device and the edge heating device are preferably installed within 10 m from the entry side of the cold rolling mill.
- the full-width heating device is preferably a solenoid induction heating device.
- the full width heating device and the edge heating device are preferably arranged in this order from the upstream side of the cold rolling mill in the rolling direction.
- the edge heating device and the full width heating device are preferably arranged in this order from the upstream side of the cold rolling mill in the rolling direction.
- silicon steel sheets can be stably rolled with low environmental load.
- FIG. 1 is a schematic diagram showing the configuration of a cold-rolled steel sheet manufacturing facility according to an embodiment of the present invention.
- FIG. 2 is a diagram showing the results of evaluating the temperature dependence of bending crack resistance of a silicon steel sheet.
- FIG. 3 is a diagram showing estimation results of the steel sheet temperature necessary for suppressing brittle fracture according to the Si content of the steel sheet.
- FIG. 4 is a graph showing the results of evaluating the temperature dependence of edge crack resistance of a silicon steel sheet.
- FIG. 5 is a diagram showing estimation results of the steel sheet temperature necessary for suppressing edge cracking according to the Si content of the steel sheet.
- FIG. 1 is a schematic diagram showing the configuration of a cold-rolled steel sheet manufacturing facility according to one embodiment of the present invention.
- a cold-rolled steel sheet manufacturing facility (hereinafter abbreviated as "manufacturing facility") according to one embodiment of the present invention is a continuous tandem rolling line having a plurality of stands.
- Device 2 looper 3, full width heating device 4, edge heating device 5 (hereinafter referred to as “heating device 6" when referring to both full width heating device 4 and edge heating device 5), thermometer (plate temperature A measuring device) 7 , a cold tandem rolling mill 8 , a cutting machine (cutting device) 9 and a tension reel 10 are provided.
- the payoff reel 1 is a device that pays out the steel plate S.
- a manufacturing facility may have a plurality of payoff reels 1 . In this case, a plurality of payoff reels pay out different steel sheets S respectively.
- the joining device 2 forms a joined steel plate by joining the tail end of the steel plate (leading material) paid out first from the payoff reel 1 and the leading end of the steel plate (following material) paid out later from the payoff reel 1. It is a device that A laser welder is preferably used as the joining device 2 .
- the looper 3 is a device that stores the steel plate S so that cold rolling by the cold tandem rolling mill 8 can be continued until the steel plates are joined together by the joining device 2 (until joining is completed). .
- the full-width heating device 4 is a device that heats the steel plate S over the entire width direction and rolling direction (longitudinal direction) of the steel plate S.
- the full width heating device 4 is set so that the temperature of the central portion in the width direction of the steel sheet S at the entry side of the cold tandem rolling mill 8 is calculated by the following formula (1), and the temperature corresponding to the Si content of the steel sheet S It is preferable to heat the steel plate S so that it becomes TC . Thereby, the brittle fracture of the steel sheet S can be effectively suppressed.
- the edge portion heating device 5 is a device that heats the edge portion (end portion in the width direction) of the steel sheet S over the entire rolling direction.
- the temperature of the edge on the entrance side of the cold tandem rolling mill 8 is a temperature TE according to the Si content of the steel sheet S calculated by the following formula (2). It is better to heat the edge part as follows. At this time, it is also necessary to take into account the temperature of the edge portion which rises due to the heating of the steel plate S by the full-width heating device 4 . As a result, edge cracks in the steel sheet S can be effectively suppressed.
- the thermometer 7 is a device that measures the surface temperature of the steel plate S.
- the thermometer 7 is preferably installed near the entry side of the cold tandem rolling mill 8 .
- a value that compensates for the steel plate temperature that decreases between the thermometer 7 and the entry side of the cold tandem rolling mill 8 is used. By doing so, it will be put into practical use.
- the cold tandem rolling mill 8 is a device that cold-rolls the steel sheet S in order to make the thickness of the steel sheet S heated by the full-width heating device 4 and the edge heating device 5 a target thickness.
- the cold tandem rolling mill 8 has five stands, but the number of stands is not particularly limited.
- the cold tandem rolling mill 8 has a form called 4Hi having four rolls in one stand, but it is not limited to this, and other forms such as 6Hi are also applicable. can do.
- the cutting machine 9 is a device that cuts the steel plate S after cold rolling.
- the tension reel 10 is a device that winds up the steel plate S cut by the cutting machine 9 .
- the form of the tension reel 10 is not limited, and may be, for example, a carousel tension reel.
- the manufacturing facility may have a plurality of tension reels 10 . In this case, the plurality of tension reels 10 wind up the plurality of steel plates S continuously.
- the equipment provided in the manufacturing facility is not limited to the equipment described above.
- the heating device 6 (the order of the full width heating device 4 and the edge heating device 5 is not limited) and the entry side of the cold tandem rolling mill 8 are arranged in this order within 10 m (more preferably adjacently arranged). It is good if there is Therefore, the rolling mill may be a reverse rolling mill instead of a tandem rolling mill. In this case, the heating device 6 and the rolling mill are arranged in this order in the first pass. Further, the cold rolling process and the pickling process, which is the preceding process, can be performed continuously, and a pickling device for pickling the steel sheet S is arranged between the looper 3 and the cold tandem rolling mill 8. You may
- the heating device 6 which is a feature of the manufacturing method of the cold-rolled steel sheet according to one embodiment of the present invention.
- the specific heating means of the heating device 6 is not particularly limited, the case where the heating device 6 is an induction heating device will be described below as an example.
- the full-width heating device 4 may be either a solenoid type or a transverse type induction heating device.
- the heating device 6 heats at least one of the upper surface and the lower surface of the steel plate S, it is more preferable to heat both the upper surface and the lower surface.
- the heating device 6 controls the temperature of the steel sheet S measured by the thermometer 7, the target temperature of the steel sheet S on the delivery side of each of the full width heating device 4 and the edge heating device 5, and the temperature of the steel plate S.
- the target temperature of the heating device 6 is determined based on the time for S to pass through the heating device 6 (that is, the heating time) and the plate thickness of the steel plate S.
- the target temperature of the steel sheet S heated by the heating device 6 is a temperature that takes into account the distance between the thermometer 7 and the heating device 6 and the distance between the thermometer 7 and the cold tandem rolling mill 8. Must be set.
- the distance from the heating device 6 to the cold tandem rolling mill 8 is very short, there is not much problem even if the target temperature of the steel sheet S on the delivery side of the heating device 6 is set as the target temperature of the steel plate S heated by the heating device 6. do not have.
- the thermometer 7, and the cold tandem rolling mill 8 is far away, until the steel plate S reaches the entry side of the cold tandem rolling mill 8, It is necessary to set the target temperature of the steel sheet S heated by the heating device 6 in consideration of the temperature drop of .
- the amount of energy used for heating the steel sheet should be small, and the heating device 6 and the thermometer 7 should be placed as close to the cold tandem rolling mill 8 as possible.
- the inventors of the present invention investigated the fracture rate when cold rolling a silicon steel sheet using a tandem rolling mill having five stands. As a result, it was found that silicon steel sheets with a high Si content had a higher fracture rate than silicon steel sheets with a low Si content.
- breakage on the upstream side such as #1std (hereinafter, the Nth stand from the upstream side in the conveying direction of the steel plate is denoted as "#Nstd"), #2std, etc., and #4std, etc. It was found that the cause was different from the breakage on the downstream side of #5std.
- bending crack resistance was evaluated when bending strain was applied to the steel plate on a laboratory scale. This is because the resistance to bending cracking in this experiment is thought to be correlated with brittle fracture due to bending deformation at the sheet threading roll and the shape detector at the upstream stand described above.
- the plate thickness is 2 mm
- the Si content is 1.8 mass%, 2.8 mass%, 3.3 mass%, and 3.7 mass% (hereinafter referred to as a silicon steel sheet with a Si content of Mmass% is referred to as “M% Si steel”) were annealed at 800° C. (corresponding to hot-rolled sheet annealing).
- the silicon steel sheet after annealing was pickled, and a test material having a width of 24 mm and a length of 250 mm was cut out using a shearing machine. After that, both end faces were ground by 2 mm each to remove processing strain caused by shearing. This suppressed the occurrence of edge breakage.
- the 1.8% Si steel and the 2.8% Si steel are steel types in which brittle fracture is unlikely to occur.
- 3.3% Si steel and 3.7% Si steel are steel types in which brittle fracture occurs at a frequency of about several percent, especially in the upstream stand.
- the steel sheet temperature at the entry side of the rolling mill is about the same as the temperature in the factory, and is around 15°C in winter.
- the temperature dependence of the bending crack resistance of silicon steel sheets was investigated when the steel sheet temperature was in the range of 15°C to 45°C.
- a steel plate with a thickness of 2 mm was rolled at a rolling reduction of 50% to produce a steel plate with a thickness of 1 mm. This simulates #1std.
- the steel plate was passed through a roller leveler by simulating the bending deformation of the steel plate by a threading roll and a shape detector. Then, bending deformation was applied to the steel plate to evaluate bending crack resistance.
- the roller leveler has 11 upper and lower work rolls with a diameter of 50 mm, and the roll interval is 60 mm.
- the 1.8% Si steel did not break up to a tightening amount of 4.0 mm, regardless of the temperature of the steel plate (15 to 45°C).
- the 2.8% Si steel when the steel plate temperature was 15°C, breakage occurred at a tightening amount of 3.5 mm, but at 25°C or higher, breakage did not occur up to a tightening amount of 4.0 mm.
- the 3.3% Si steel fracture occurred at a tightening amount of 1.5 mm when the steel plate temperature was 15°C and at a tightening amount of 3.0 mm at 25°C. However, when the steel plate temperature was 35° C. or higher, no breakage occurred up to a tightening amount of 4.0 mm.
- FIG. 3 shows the result of estimating the steel plate temperature necessary for suppressing brittle fracture according to the Si content of the steel plate based on the results of this experiment.
- the approximation curve in the drawing is represented by the following formula (3).
- the Si content ⁇ [%] in the formula (3) is practically considered to be about ⁇ >2.
- the steel plate temperature T Cmin calculated from the formula (3) is the minimum required temperature, and from the viewpoint of suppression of breakage, this temperature or higher is sufficient. However, if the steel sheet temperature becomes too high, the steel sheet shape and lubricity are affected, so the steel sheet temperature is set to 200° C. or less. Moreover, the upper limit of 4.5% of the Si content ⁇ was set from a range in which the temperature of the steel plate edge portion, which will be described later, is 200° C. or lower.
- the steel plate was rolled on a laboratory scale to evaluate the presence or absence of edge cracks.
- the edge crack that occurred on the upstream side in the rolling direction expanded and fractured as it progressed to the stand on the downstream side in the rolling direction. If it is possible to completely suppress the cracking of the edge of the steel sheet, it is possible to suppress the breakage due to the edge cracking.
- four types of silicon steel plates 1.8% Si steel, 2.8% Si steel, 3.3% Si steel, and 3.7% Si steel, each having a thickness of 2 mm, were cut to a width of 20 mm. and 250 mm long and annealed at 800° C. (equivalent to hot-rolled sheet annealing). Then, the silicon steel sheet after annealing was pickled. It can be considered that the state of the steel plate edge portion at this time is close to the actual state at the entry side of the continuous cold rolling mill.
- Si steel is a steel type in which cracks at the steel plate edges are less likely to occur.
- 3.3% Si steel and 3.7% Si steel are steel types in which steel plate edge cracks occur at a frequency of about several percent.
- the steel sheet temperature at the entry side of the rolling mill is about the same as the temperature in the factory, and is around 15°C in winter. Therefore, the temperature dependence of the edge crack resistance of silicon steel sheets was investigated when the steel sheet temperature was in the range of 15°C to 65°C.
- FIG. 5 shows the result of estimating the temperature necessary for suppressing edge cracking of the steel sheet according to the Si content of the steel sheet based on the results of this experiment.
- the approximation curve in the drawing is represented by the following formula (4).
- the Si content ⁇ [%] in the formula (4) is practically considered to be about ⁇ >2.
- the steel plate temperature T Emin calculated from the formula (4) is the minimum required temperature, and from the viewpoint of suppression of breakage, this temperature or higher is sufficient.
- the steel sheet temperature is set to 200° C. or less.
- the upper limit of 4.5% of the Si content ⁇ was set from the range in which the temperature of the steel plate edge portion calculated from the formula (4) is 200° C. or less.
- the steel plate is heated within a range of 30 mm or more from the edge of the steel plate. This is because it is the influence range of width widening in cold rolling that affects steel plate edge cracks, and this range is said to be about 30 mm from the edge of the steel plate.
- the steel plate heating temperature required to suppress breakage from the central portion in the width direction of the steel plate and the breakage from the edge portion are different.
- the temperature required to suppress breakage from the center in the width direction is 45°C or higher
- the temperature required to suppress edge cracking is 65°C or higher.
- the temperature of the edge portion is higher than that of the center portion in the width direction even for the same steel type. It was found that it was necessary to provide a temperature gradient in the width direction of the film, and the present invention was conceived.
- the heating device 6 acquires information indicating the Si content of the preceding material and the succeeding material, and sets the target temperature based on the information. Change, decide. Further, in the present embodiment, the material to be rolled is described as a silicon steel sheet, but the type of steel sheet is not limited. Steel sheets other than silicon steel sheets to which the technique of the present invention can be preferably applied include, for example, high-strength steel sheets and high-alloy steel sheets.
- the cold-rolled steel strip manufacturing facility and manufacturing method according to the embodiment of the present invention by using the full-width heating device 4 and the edge heating device 5 together, By appropriately controlling the temperature necessary for suppressing the breakage of the steel sheet and edge cracking, the breakage of the steel sheet is suppressed. Therefore, according to the cold-rolled steel strip manufacturing facility and the cold-rolled steel strip manufacturing method according to one embodiment of the present invention, when the silicon steel sheet is cold-rolled, breakage of the steel sheet is suppressed with the minimum necessary energy. Therefore, the silicon steel sheet can be stably cold rolled with minimum environmental load.
- a full width heating device and an edge heating device are installed on the entry side of the cold rolling mill in this order from the upstream side in the rolling direction, so that the steel plate temperature on the entry side of the rolling mill can be set to an arbitrary temperature. ing. Then, it was finished to a predetermined thickness by a 5-stand cold tandem rolling mill.
- All of the steel types used in this example were silicon steel sheets, which were divided into three groups according to the Si content. Specifically, there are three groups: a group with a Si content of 1.0 mass% to 2.0 mass%, a group with a Si content of 2.0 mass% to 3.0 mass%, and a group with a Si content of 3.0 mass% to 3.5 mass%.
- Each group has a thickness of 1.8 mm to 2.4 mm before rolling and a thickness of 0.3 mm to 0.5 mm after rolling.
- care was taken so that the plate thickness was not uneven among the groups.
- the breaking rate of 200 coils was investigated in each group.
- the outside air temperature (the temperature inside the factory) was about 15°C.
- Table 1 shows the coils and conditions investigated.
- the steel plate temperature was measured using a thermometer installed at the entrance side of the rolling mill.
- the steel plate temperature at the entry side of the cold tandem rolling mill was calculated according to the Si content of the silicon steel plate from the above formulas (1) and (2), and based on this, the steel plate was heated by the full width heating device and the edge heating device.
- An example case is shown. This is the case of the configuration in which the order is the full width heating device, the edge heating device, and the cold tandem rolling mill. Also, the distance between the cold tandem rolling mill and the heating device is 10 m.
- the temperature of the edge portion is higher than that of the central portion of the width of the steel sheet.
- the rupture rate of 200 coils (width center 17° C., edge portion 18° C.) having an Si content of 1.0 mass % to 2.0 mass % was 0%.
- the fracture rate of 200 coils with Si content of 2.0 mass% to 3.0 mass% is also 0%
- 200 coils with Si content of 3.0 mass% to 3.5 mass% width
- the fracture rate at the center (45°C, edge portion 60°C) was also 0%. It was confirmed that by heating the silicon steel sheet according to the present invention, breakage of the steel sheet can be greatly reduced.
- the steel plate temperature at the entry side of the cold tandem rolling mill was calculated according to the Si content of the silicon steel plate from the above formulas (1) and (2), and based on this, the steel plate was heated by the full width heating device and the edge heating device.
- An example case is shown. This is the case of the configuration in which the order is the edge portion heating device, the full width heating device, and the cold tandem rolling mill. That is, the invention example 1 is an embodiment that differs only in the arrangement order of the full-width heating device and the edge portion heating device.
- the rupture rate of 200 coils (width center 17° C., edge portion 18° C.) having an Si content of 1.0 mass % to 2.0 mass % was 0%.
- the fracture rate of 200 coils with Si content of 2.0 mass% to 3.0 mass% is also 0%
- 200 coils with Si content of 3.0 mass% to 3.5 mass% was also 0%. It has been confirmed that when the steel plate temperature calculated by the above formulas (1) and (2) can be secured at the entry side of the cold tandem rolling mill, the steel plate breakage can be suppressed regardless of the order of the full width heating device and the edge heating device. rice field.
- the steel plate temperature at the entry side of the cold tandem rolling mill was calculated according to the Si content of the silicon steel plate from the above formulas (1) and (2), and based on this, the steel plate was heated by the full width heating device and the edge heating device.
- An example case is shown. This is the case where the heating device is installed so that the distance between the cold tandem rolling mill and the heating device is between 1 m and 1.5 m. That is, the distance between the cold tandem rolling mill and the heating device is shorter than in Invention Example 1, and the other conditions are the same as in Invention Example 1.
- the rupture rate of 200 coils (width center 17° C., edge portion 18° C.) having an Si content of 1.0 mass % to 2.0 mass % was 0%.
- the fracture rate of 200 coils with Si content of 2.0 mass% to 3.0 mass% is also 0%
- 200 coils with Si content of 3.0 mass% to 3.5 mass% was also 0%. Focusing only on the fracture rate, fracture can be suppressed up to 3.5% Si steel, which is the same as Invention Example 1, but from the viewpoint of energy consumption, it can be significantly reduced compared to Invention Example 1. , and the superiority of Invention Example 3 can be confirmed. Therefore, from the viewpoint of energy consumption reduction (environmental resistance), it was confirmed that the closer the distance between the cold tandem rolling mill and the heating device, the better.
- the steel plate temperature at the entry side of the cold tandem rolling mill was calculated according to the Si content of the silicon steel plate from the above formulas (1) and (2), and based on this, the steel plate was heated by the full width heating device and the edge heating device.
- An example case is shown.
- a transverse induction heating device is used. That is, this is an example in which, of the conditions of Example 1, the full width heating device was changed from the solenoid type induction heating device to the transverse type induction heating device.
- the rupture rate of 200 coils (width center 17° C., edge portion 18° C.) having an Si content of 1.0 mass % to 2.0 mass % was 0%.
- the fracture rate of 200 coils with Si content of 2.0 mass% to 3.0 mass% is also 0%
- 200 coils with Si content of 3.0 mass% to 3.5 mass% was also 0%. It was confirmed that the full-width heating device can obtain the same fracture suppression effect for the solenoid type and the transverse type.
- the rupture rate of 200 coils width center 30° C., edge portion 25° C.
- Si content 2.0 mass% to 3.0 mass% is 0.5%
- the breaking rate of the coil was 2%.
- the rupture rate of 200 coils (width center 40 ° C., edge portion 35 ° C.) with Si content of 2.0 mass% to 3.0 mass% is 0%
- the fracture rate at the center (70°C, edge portion 60°C) was also 0%.
- the temperature of the central portion in the width direction is heated more than necessary from the viewpoint of suppression of breakage, and it is preferable to reduce the input energy amount when considering the environmental load.
- the rupture rate of 200 coils with a Si content of 1.0 mass% to 2.0 mass% is 0%, and the Si content of 200 coils with a Si content of 2.0 mass% to 3.0 mass%
- the fracture rate at (width center 25°C, edge portion 30°C) was also 0%.
- the fracture rate of 200 coils (width center 40° C., edge portion 50° C.) of 3.0 mass % to 3.5 mass % was 1%.
- the distance between the heating device and the cold tandem rolling mill should be as short as possible. It was confirmed that when installed, the higher the Si steel, the more likely it is to break.
- the rupture rate of 200 coils (width center 30° C., edge portion 40° C.) having a Si content of 3.0 mass % to 3.5 mass % was 1.5%. It was confirmed that when the steel plate temperature is lower than the steel plate temperature calculated from the above formulas (1) and (2), the higher the Si steel, the more likely it is to break.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
まず、図1を参照して、本発明の一実施形態である冷延鋼板の製造設備の構成について説明する。
次に、本発明の一実施形態である冷延鋼板の製造方法の特徴である、加熱装置6による鋼板Sの加熱工程について説明する。なお、加熱装置6の具体的な加熱手段は特段限定されないが、以下では加熱装置6が誘導加熱装置である場合を例として説明する。また、全幅加熱装置4は、ソレノイド式又はトランスバース式の誘導加熱装置のどちらでも構わない。また、加熱装置6は鋼板Sの上面及び下面の少なくとも一方を加熱するが、上面及び下面の両方を加熱することがより好ましい。
全幅加熱装置及びエッジ部加熱装置によって鋼板を加熱しない場合、つまり、圧延機入側の鋼板温度が15℃程度になる場合の例を示している。Si含有量が1.0mass%から2.0mass%の200コイルの破断率は0%であった。一方で、Si含有量が2.0mass%から3.0mass%の200コイルの破断率は1%、3.0mass%から3.5mass%の200コイルの破断率は3%であった。
上記数式(1),(2)より珪素鋼板のSi含有量に応じた冷間タンデム圧延機入側の鋼板温度を算出し、これに基づいて全幅加熱装置及びエッジ部加熱装置により鋼板を加熱した場合の例を示している。全幅加熱装置、エッジ部加熱装置、及び冷間タンデム圧延機の順となる構成の場合である。また、冷間タンデム圧延機と加熱装置との間の距離は10mである。本発明例では、鋼板幅中央部よりエッジ部の温度の方が高い。Si含有量が1.0mass%から2.0mass%の200コイル(幅中央17℃、エッジ部18℃)の破断率は0%であった。また、Si含有量が2.0mass%から3.0mass%の200コイル(幅中央30℃、エッジ部35℃)の破断率も0%、3.0mass%から3.5mass%の200コイル(幅中央45℃、エッジ部60℃)の破断率も0%であった。本発明に基づき珪素鋼板を加熱することで鋼板の破断を大幅に低減できることが確認された。
上記数式(1),(2)より珪素鋼板のSi含有量に応じた冷間タンデム圧延機入側の鋼板温度を算出し、これに基づいて全幅加熱装置及びエッジ部加熱装置により鋼板を加熱した場合の例を示している。エッジ部加熱装置、全幅加熱装置、及び冷間タンデム圧延機の順となる構成の場合である。つまり、発明例1とは、全幅加熱装置とエッジ部加熱装置の配置順だけが異なる実施例である。Si含有量が1.0mass%から2.0mass%の200コイル(幅中央17℃、エッジ部18℃)の破断率は0%であった。また、Si含有量が2.0mass%から3.0mass%の200コイル(幅中央30℃、エッジ部35℃)の破断率も0%、3.0mass%から3.5mass%の200コイル(幅中央45℃、エッジ部60℃)の破断率も0%であった。冷間タンデム圧延機入側で上記数式(1),(2)より算出される鋼板温度を確保できる場合、全幅加熱装置とエッジ部加熱装置の順番によらず鋼板の破断を抑制できることが確認された。
上記数式(1),(2)より珪素鋼板のSi含有量に応じた冷間タンデム圧延機入側の鋼板温度を算出し、これに基づいて全幅加熱装置及びエッジ部加熱装置により鋼板を加熱した場合の例を示している。冷間タンデム圧延機と加熱装置との距離が1mから1.5mの間になるように加熱装置を設置した場合である。つまり、発明例1と比較して、冷間タンデム圧延機と加熱装置の距離が近くなっており、その他の条件は発明例1と同じである。Si含有量が1.0mass%から2.0mass%の200コイル(幅中央17℃、エッジ部18℃)の破断率は0%であった。また、Si含有量が2.0mass%から3.0mass%の200コイル(幅中央30℃、エッジ部35℃)の破断率も0%、3.0mass%から3.5mass%の200コイル(幅中央45℃、エッジ部60℃)の破断率も0%であった。破断率だけに着目すると、3.5%Si鋼まで破断を抑制できており、発明例1と同じであるが、エネルギー使用量の観点からは、発明例1と比較して大幅に低減できており、発明例3の優位性が確認できる。ゆえに、エネルギー使用量低減(耐環境性)の観点からは、冷間タンデム圧延機と加熱装置の距離は近いほどよいということが確認できた。
上記数式(1),(2)より珪素鋼板のSi含有量に応じた冷間タンデム圧延機入側の鋼板温度を算出し、これに基づいて全幅加熱装置及びエッジ部加熱装置により鋼板を加熱した場合の例を示している。ここでは、トランスバース式の誘導加熱装置を用いる。つまり、発明例1の条件のうち、全幅加熱装置をソレノイド式の誘導加熱装置からトランスバース式の誘導加熱装置に変更して実施した例である。Si含有量が1.0mass%から2.0mass%の200コイル(幅中央17℃、エッジ部18℃)の破断率は0%であった。また、Si含有量が2.0mass%から3.0mass%の200コイル(幅中央30℃、エッジ部35℃)の破断率も0%、3.0mass%から3.5mass%の200コイル(幅中央45℃、エッジ部60℃)の破断率も0%であった。全幅加熱装置はソレノイド式とトランスバース式で同等の破断抑制効果を得られることが確認できた。
エッジ部加熱装置は使用せず、全幅加熱装置のみを用いた場合の例を示している。全幅加熱装置により加熱する鋼板の温度は数式(1)より算出した。つまり、エッジ部割れの抑制に必要と考える温度は確保できず、さらに、エッジ部は幅中央部と比較して鋼板温度が低下しやすいため、エッジ部温度は幅中央部と比べて低温となっている。Si含有量が1.0mass%から2.0mass%の200コイル(幅中央17℃、エッジ部16℃)の破断率は0%であった。一方で、Si含有量が2.0mass%から3.0mass%の200コイル(幅中央30℃、エッジ部25℃)の破断率は0.5%、3.0mass%から3.5mass%の200コイル(幅中央45℃、エッジ部35℃)の破断率は2%であった。破断したコイルの破断形態を調査したところ、幅方向中央部からの破断は抑制できていたが、エッジ部割れによる破断を抑制することができていなかった。
エッジ部加熱装置は使用せず、全幅加熱装置のみを用いた場合の例を示している。全幅加熱装置により加熱する鋼板の温度は数式(2)より算出した。つまり、エッジ部割れ抑制に必要だと考える温度にエッジ部の温度がなるように幅方向全域に亘って加熱するということである。Si含有量が1.0mass%から2.0mass%の200コイル(幅中央20℃、エッジ部18℃)の破断率は0%であった。また、Si含有量が2.0mass%から3.0mass%の200コイル(幅中央40℃、エッジ部35℃)の破断率は0%、3.0mass%から3.5mass%の200コイル(幅中央70℃、エッジ部60℃)の破断率も0%であった。しかしながら、幅方向中央部の温度は、破断抑制の観点からは必要以上に加熱しており、環境負荷を考えた際には、投入エネルギー量を低減するとよい。
全幅加熱装置は使用せず、エッジ部加熱装置のみを用いた場合の例を示している。エッジ部加熱装置により加熱する鋼板エッジ部の温度は数式(2)より算出した。Si含有量が1.0mass%から2.0mass%の200コイル(幅中央15℃、エッジ部18℃)の破断率は0%であった。一方で、Si含有量が2.0mass%から3.0mass%の200コイル(幅中央15℃、エッジ部35℃)の破断率は0.5%、3.0mass%から3.5mass%の200コイル(幅中央15℃、エッジ部60℃)の破断率は2%であった。破断したコイルの破断形態を調査したところ、エッジ部割れによる破断は抑制できていたが、幅方向中央部からの破断は抑制できていなかった。
上記数式(1),(2)より珪素鋼板のSi含有量に応じた冷間タンデム圧延機入側の鋼板温度を算出し、これに基づいて全幅加熱装置及びエッジ部加熱装置により鋼板を加熱した場合の例を示している。加熱装置と冷間タンデム圧延機の距離が20mの場合である。つまり、発明例1の条件のうち、加熱装置と冷間タンデム圧延機との間の距離を長くした例である。加熱装置と冷間タンデム圧延機の距離が長いため、加熱装置の能力の上限値まで使用しても上記数式(1),(2)より算出した冷間タンデム圧延機入側の鋼板温度にすることができなかった。Si含有量が1.0mass%から2.0mass%の200コイル(幅中央15℃、エッジ部15℃)の破断率は0%、Si含有量が2.0mass%から3.0mass%の200コイル(幅中央25℃、エッジ部30℃)の破断率も0%であった。一方、3.0mass%から3.5mass%の200コイル(幅中央40℃、エッジ部50℃)の破断率は1%であった。加熱装置と冷間タンデム圧延機との間の距離は短い方がよく、加熱装置の能力の上限まで使用しても上記数式(1),(2)より算出される鋼板温度を確保できない距離に設置した場合、高Si鋼ほど破断が発生しやすくなることを確認できた。
上記数式(1),(2)より算出した珪素鋼板のSi含有量に応じた圧延機入側の鋼板温度よりも各々30%程度低温になるように、全幅加熱装置及びエッジ部加熱装置により鋼板を加熱した場合の例を示している。その他の条件は発明例1と同じである。Si含有量が1.0mass%から2.0mass%の200コイル(幅中央15℃、エッジ部15℃)の破断率は0%、2.0mass%から3.0mass%の200コイル(幅中央20℃、エッジ部25℃)の破断率も0%であった。一方、Si含有量が3.0mass%から3.5mass%の200コイル(幅中央30℃、エッジ部40℃)の破断率は1.5%であった。上記数式(1),(2)より算出される鋼板温度より低温の場合、高Si鋼ほど破断が発生しやすくなることを確認できた。
2 接合装置
3 ルーパー
4 全幅加熱装置
5 エッジ部加熱装置
6 加熱装置
7 温度計
8 冷間タンデム圧延機
9 切断機
10 テンションリール
S 鋼板
Claims (12)
- 鋼板の幅方向全域に亘って鋼板を加熱する全幅加熱装置と、前記鋼板の幅方向端部を加熱するエッジ部加熱装置と、前記全幅加熱装置及び前記エッジ部加熱装置に対して圧延方向下流側に配置された、前記鋼板を圧延する冷間圧延機と、を用いた冷延鋼板の製造方法であって、
前記冷間圧延機の入側において鋼板の幅方向中央部の温度よりも幅方向端部の温度が高くなるように、前記全幅加熱装置及び前記エッジ部加熱装置を用いて鋼板を加熱するステップを含む、冷延鋼板の製造方法。 - 前記冷間圧延機の入側における鋼板の幅方向中央部及び幅方向端部の温度が、鋼板のSi含有量に応じて変化する、請求項1に記載の冷延鋼板の製造方法。
- 前記全幅加熱装置によって鋼板の幅方向全域に亘って鋼板を加熱する全幅加熱工程と、前記エッジ部加熱装置によって鋼板の幅方向端部を加熱するエッジ部加熱工程と、前記冷間圧延機によって鋼板を圧延する圧延工程と、をこの順に行う、請求項1~3のうち、いずれか1項に記載の冷延鋼板の製造方法。
- 前記エッジ部加熱装置によって鋼板の幅方向端部を加熱するエッジ部加熱工程と、前記全幅加熱装置によって鋼板の幅方向全域に亘って鋼板を加熱する全幅加熱工程と、前記冷間圧延機によって鋼板を圧延する圧延工程と、をこの順に行う、請求項1~3のうち、いずれか1項に記載の冷延鋼板の製造方法。
- 鋼板の幅方向全域に亘って鋼板を加熱する全幅加熱装置と、
前記鋼板の幅方向端部を加熱するエッジ部加熱装置と、
前記全幅加熱装置及び前記エッジ部加熱装置に対して圧延方向下流側に配置された、前記鋼板を圧延する冷間圧延機と、を備え、
前記全幅加熱装置及びエッジ部加熱装置は、前記冷間圧延機の入側において鋼板の幅方向中央部の温度よりも幅方向端部の温度が高くなるように、鋼板を加熱する、冷延鋼板の製造設備。 - 前記全幅加熱装置及び前記エッジ部加熱装置が、鋼板のSi含有量に応じて前記冷間圧延機の入側における鋼板の幅方向中央部及び幅方向端部の温度を変化させる、請求項6に記載の冷延鋼板の製造設備。
- 前記全幅加熱装置及び前記エッジ部加熱装置は、前記冷間圧延機の入側から10m以内の位置に設置されている、請求項6~8のうち、いずれか1項に記載の冷延鋼板の製造設備。
- 前記全幅加熱装置は、ソレノイド式誘導加熱装置である、請求項6~9のうち、いずれか1項に記載の冷延鋼板の製造設備。
- 前記全幅加熱装置及び前記エッジ部加熱装置は、前記冷間圧延機の圧延方向上流側からこの順に配置されている、請求項6~10のうち、いずれか1項に記載の冷延鋼板の製造設備。
- 前記エッジ部加熱装置及び前記全幅加熱装置は、前記冷間圧延機の圧延方向上流側からこの順に配置されている、請求項6~10のうち、いずれか1項に記載の冷延鋼板の製造設備。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/283,550 US20240165683A1 (en) | 2021-04-30 | 2021-12-15 | Manufacturing method and manufacturing equipment of cold-rolled steel sheet |
CN202180096457.5A CN117098613A (zh) | 2021-04-30 | 2021-12-15 | 冷轧钢板的制造方法和制造设备 |
MX2023011359A MX2023011359A (es) | 2021-04-30 | 2021-12-15 | Metodo de fabricacion y equipo de fabricacion de lamina de acero laminada en frio. |
KR1020237031436A KR20230145449A (ko) | 2021-04-30 | 2021-12-15 | 냉연 강판의 제조 방법 및 제조 설비 |
EP21939384.0A EP4299203A1 (en) | 2021-04-30 | 2021-12-15 | Cold-rolled steel sheet manufacturing method and cold-rolled steel sheet manufacturing facility |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021-077586 | 2021-04-30 | ||
JP2021077586A JP7111217B1 (ja) | 2021-04-30 | 2021-04-30 | 冷延鋼板の製造方法及び製造設備 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022230229A1 true WO2022230229A1 (ja) | 2022-11-03 |
Family
ID=82693708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/046317 WO2022230229A1 (ja) | 2021-04-30 | 2021-12-15 | 冷延鋼板の製造方法及び製造設備 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20240165683A1 (ja) |
EP (1) | EP4299203A1 (ja) |
JP (1) | JP7111217B1 (ja) |
KR (1) | KR20230145449A (ja) |
CN (1) | CN117098613A (ja) |
MX (1) | MX2023011359A (ja) |
TW (1) | TWI797912B (ja) |
WO (1) | WO2022230229A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0523724A (ja) * | 1991-07-15 | 1993-02-02 | Nkk Corp | 鋼板の温間圧延設備 |
CN101550480A (zh) * | 2008-03-31 | 2009-10-07 | 鞍钢股份有限公司 | 一种用酸洗连轧机组生产取向硅钢的方法 |
JP2011079025A (ja) | 2009-10-08 | 2011-04-21 | Mitsubishi-Hitachi Metals Machinery Inc | 電磁鋼板用冷間圧延設備及び圧延方法 |
JP2012148310A (ja) | 2011-01-19 | 2012-08-09 | Jfe Steel Corp | 鋼板エッジ部の加熱方法 |
JP2021030239A (ja) * | 2019-08-15 | 2021-03-01 | 日本製鉄株式会社 | 冷間タンデム圧延設備及び冷間タンデム圧延方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101234431B1 (ko) * | 2008-02-13 | 2013-02-18 | 신닛테츠스미킨 카부시키카이샤 | 강판의 냉간 압연 방법 및 냉간 압연 설비 |
JP6020479B2 (ja) * | 2014-01-29 | 2016-11-02 | Jfeスチール株式会社 | 冷間圧延設備および冷間圧延方法 |
KR102032039B1 (ko) * | 2015-03-26 | 2019-10-14 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | 온도 계산 방법, 온도 계산 장치, 가열 제어 방법, 및 가열 제어 장치 |
EP3590614B1 (en) * | 2017-02-28 | 2021-06-16 | JFE Steel Corporation | Cold rolling mill and cold rolling method |
-
2021
- 2021-04-30 JP JP2021077586A patent/JP7111217B1/ja active Active
- 2021-12-15 KR KR1020237031436A patent/KR20230145449A/ko unknown
- 2021-12-15 WO PCT/JP2021/046317 patent/WO2022230229A1/ja active Application Filing
- 2021-12-15 CN CN202180096457.5A patent/CN117098613A/zh active Pending
- 2021-12-15 MX MX2023011359A patent/MX2023011359A/es unknown
- 2021-12-15 EP EP21939384.0A patent/EP4299203A1/en active Pending
- 2021-12-15 US US18/283,550 patent/US20240165683A1/en active Pending
- 2021-12-24 TW TW110148757A patent/TWI797912B/zh active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0523724A (ja) * | 1991-07-15 | 1993-02-02 | Nkk Corp | 鋼板の温間圧延設備 |
CN101550480A (zh) * | 2008-03-31 | 2009-10-07 | 鞍钢股份有限公司 | 一种用酸洗连轧机组生产取向硅钢的方法 |
JP2011079025A (ja) | 2009-10-08 | 2011-04-21 | Mitsubishi-Hitachi Metals Machinery Inc | 電磁鋼板用冷間圧延設備及び圧延方法 |
JP2012148310A (ja) | 2011-01-19 | 2012-08-09 | Jfe Steel Corp | 鋼板エッジ部の加熱方法 |
JP2021030239A (ja) * | 2019-08-15 | 2021-03-01 | 日本製鉄株式会社 | 冷間タンデム圧延設備及び冷間タンデム圧延方法 |
Also Published As
Publication number | Publication date |
---|---|
TW202243767A (zh) | 2022-11-16 |
TWI797912B (zh) | 2023-04-01 |
JP7111217B1 (ja) | 2022-08-02 |
CN117098613A (zh) | 2023-11-21 |
US20240165683A1 (en) | 2024-05-23 |
EP4299203A1 (en) | 2024-01-03 |
KR20230145449A (ko) | 2023-10-17 |
JP2022171139A (ja) | 2022-11-11 |
MX2023011359A (es) | 2023-10-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR20090115195A (ko) | 퀴리점을 가진 강 스트립의 연속 소둔 방법 및 연속 소둔 설비 | |
WO2022230230A1 (ja) | 冷延鋼板の製造方法及び製造設備 | |
JP5811051B2 (ja) | 金属板の冷間圧延方法及び金属板の製造方法 | |
JP5691231B2 (ja) | 冷間圧延方法 | |
WO2022230229A1 (ja) | 冷延鋼板の製造方法及び製造設備 | |
JP7311764B2 (ja) | 冷間タンデム圧延設備及び冷間タンデム圧延方法 | |
JP6922873B2 (ja) | 調質圧延方法、調質圧延装置および鋼板の製造方法 | |
WO2017130765A1 (ja) | 熱延鋼帯の製造設備列および熱延鋼帯の製造方法 | |
JP7192378B2 (ja) | 圧延設備及び鋼板の圧延方法 | |
WO2021205687A1 (ja) | 冷延鋼帯の製造設備および冷延鋼帯の製造方法 | |
JP6070616B2 (ja) | 熱延鋼板の製造方法 | |
JP6447836B2 (ja) | 熱延鋼帯の製造方法および熱延鋼帯の製造設備 | |
JP3793515B2 (ja) | 鋼板の熱間圧延方法及び装置 | |
JPH09262614A (ja) | 連続熱間仕上げ圧延における圧延材接合部の圧延方法 | |
JPS5827004B2 (ja) | 連続冷間圧延設備 | |
JP2001239446A (ja) | 金属帯の研削装置及び研削方法 | |
JP2005205454A (ja) | 高Ni合金鋼連続鋳造スラブの熱間圧延方法 | |
JPH09235623A (ja) | 熱延連続化プロセスによる表面性状と酸洗性の良好な熱延鋼板の製造方法 | |
JP2004050183A (ja) | 鋼板の熱間圧延方法及び装置 | |
PL237690B1 (pl) | Sposób wytwarzania taśmy z odpadowej blachy stalowej | |
JP2004122210A (ja) | 金属帯の冷間圧延方法 | |
JP2002059209A (ja) | 冷延鋼帯の板幅制御方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21939384 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20237031436 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020237031436 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18283550 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/A/2023/011359 Country of ref document: MX |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180096457.5 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2301006212 Country of ref document: TH |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2021939384 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2021939384 Country of ref document: EP Effective date: 20230928 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |