CN116475226A - Production method of plate and plate - Google Patents
Production method of plate and plate Download PDFInfo
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- CN116475226A CN116475226A CN202310412650.6A CN202310412650A CN116475226A CN 116475226 A CN116475226 A CN 116475226A CN 202310412650 A CN202310412650 A CN 202310412650A CN 116475226 A CN116475226 A CN 116475226A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 238000005098 hot rolling Methods 0.000 claims abstract description 32
- 238000005520 cutting process Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 58
- 238000000034 method Methods 0.000 claims description 40
- 238000005096 rolling process Methods 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 17
- 239000000110 cooling liquid Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 23
- 230000008569 process Effects 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 230000005465 channeling Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations 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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
-
- 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
- B21B2001/225—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 hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Metal Rolling (AREA)
Abstract
The application discloses a production method of a plate and the plate. The production method of the plate comprises the following steps: providing a strip to be rolled; controlling a hot rolling production line according to the target plate shape to perform hot rolling, cooling and coiling on the strip to be rolled to obtain a coiled material; and (5) cutting the coiled material into a flat shape and transversely cutting the coiled material to obtain the target plate. According to the production method of the plate, the residual stress of the plate can be reduced, and the residual stress distribution is more uniform.
Description
Technical Field
The application belongs to the technical field of steel rolling, and particularly relates to a production method of a plate and the plate.
Background
Along with the improvement of the automatic production level of engineering machinery and automobile industry, the requirement on the blanking deformation of the high-strength thin-specification plates is more and more severe, and the side bending of the plates not only affects the automatic production of the current blanking process, but also affects the automatic welding, bending and the like of the subsequent process. In the prior art, the strip is usually subjected to hot rolling, leveling and flattening and transverse cutting to obtain a plate, but the plate often has uneven residual stress, so that the plate is bent sideways in the subsequent working procedures.
Disclosure of Invention
The embodiment of the application provides a production method of a plate and the plate, which can reduce the residual stress of the plate and enable the residual stress distribution to be more uniform.
An embodiment of a first aspect of the present application provides a method for producing a sheet material, including:
providing a strip to be rolled;
controlling a hot rolling production line according to the target plate shape to perform hot rolling, cooling and coiling on the strip to be rolled to obtain a coiled material;
and (5) cutting the coiled material into a flat shape and transversely cutting the coiled material to obtain the target plate.
According to an embodiment of the first aspect of the present application, a hot rolling line includes a rolling mill apparatus, a cooling apparatus, and a coiling apparatus, and the hot rolling line is controlled to hot-roll, cool, and coil a strip to be rolled according to a target plate shape to obtain a coil, including:
rolling the strip to be rolled by controlling rolling mill equipment to obtain a hot rolled strip;
detecting the flatness of the hot rolled strip to obtain a first flatness result;
controlling cooling equipment to cool the hot rolled strip under the condition that the first flatness result meets a first preset range to obtain a cooled strip;
detecting the flatness of the cooled strip to obtain a second flatness result;
and controlling the coiling equipment to coil the cooled strip under the condition that the second flatness result meets a second preset range, so as to obtain the coiled material.
According to any of the foregoing embodiments of the first aspect of the present application, the cooling apparatus includes a liquid spray pipe, and the cooling apparatus is controlled to cool the hot rolled strip to obtain a cooled strip, including:
and controlling the spray pipe to spray cooling liquid to the surface of the hot rolled strip so as to cool the hot rolled strip and obtain a cooled strip.
According to any of the foregoing embodiments of the first aspect of the present application, the spray tube includes an upper header for spraying the cooling liquid onto the upper surface of the hot strip and a lower header for spraying the cooling liquid onto the lower surface of the hot strip.
According to any one of the foregoing embodiments of the first aspect of the present application, along a length direction of a hot rolled strip, the hot rolled strip includes a first detection area and two first non-detection areas located at both ends of the first detection area, and the detecting the flatness of the hot rolled strip to obtain a first flatness result includes:
the flatness of a first detection zone of the hot rolled strip is detected, and a first flatness result is obtained.
According to any of the foregoing embodiments of the first aspect of the present application, the first flatness result comprises a first flatness I Heat of the body The first preset range is-100.ltoreq.I Heat of the body ≤0。
According to any of the foregoing embodiments of the first aspect of the present application, along a length direction of the cooled strip, the cooled strip includes a second detection zone and two second non-detection zones located at both ends of the second detection zone, and detecting a flatness of the cooled strip to obtain a second flatness result, including:
and detecting the flatness of a second detection area of the cooled strip, and obtaining a second flatness result.
According to any of the foregoing embodiments of the first aspect of the present application, along a width direction of a cooled strip, the cooled strip includes a third detection area and two third non-detection areas located at two sides of the third detection area, an overlapping area of the second detection area and the third detection area is a target detection area, flatness of the cooled strip is detected, and a second flatness result is obtained, including:
the flatness of the target detection zone of the cooled strip is detected, and a second flatness result is obtained.
According to any of the preceding embodiments of the first aspect of the present application, the second flatness result comprises a second flatness I Cold water The second preset range is not less than 0 and not more than I Cold water ≤60。
An embodiment of a second aspect of the present application provides a sheet material prepared by the method for producing a sheet material according to any one of the embodiments of the first aspect.
The production method of the plate comprises the following steps: providing a strip to be rolled; controlling a hot rolling production line according to the target plate shape to perform hot rolling, cooling and coiling on the strip to be rolled to obtain a coiled material; and (5) cutting the coiled material into a flat shape and transversely cutting the coiled material to obtain the target plate. Compared with the production method of the plate in the prior art, the flattening process is omitted, the hot rolling process and the flat cutting process are only included, and the hot rolling production line is controlled to roll in the hot rolling process according to the target plate shape. After the flattening process is canceled, the difficulty of rough straightening and fine straightening in the transverse cutting process can be reduced, so that the residual stress of the plate after fine straightening is smaller and the distribution is more uniform.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.
FIG. 1 is a schematic flow chart of a method of producing a sheet material according to an embodiment of the first aspect of the present application;
fig. 2 is a schematic partial flow chart of a method for producing a sheet material according to an embodiment of the first aspect of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples thereof, and in the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In this context, unless otherwise indicated, the meaning of "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Moreover, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. It will be understood that when a layer, an area, or a structure is described as being "on" or "over" another layer, another area, it can be referred to as being directly on the other layer, another area, or another layer or area can be included between the layer and the other layer, another area. And if the component is turned over, that layer, one region, will be "under" or "beneath" the other layer, another region. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.
Along with the improvement of the automatic production level of engineering machinery and automobile industry, the requirement on the blanking deformation of the high-strength thin-specification plates is more and more severe, and the side bending of the plates not only affects the automatic production of the current blanking process, but also affects the automatic welding, bending and the like of the subsequent process. In the prior art, the strip is usually subjected to hot rolling, leveling and flattening and transverse cutting to obtain a plate, but the plate often has uneven residual stress, so that the plate is bent sideways in the subsequent working procedures. The flattening process can be regarded as cold rolling with extremely low rolling reduction, and when in flattening, the working roller introduces an uneven cold-pressing strain layer to the surface of the strip due to uneven wear, deflection and the like, so that the internal stress in the strip is increased, the strain layer itself contains unevenly distributed internal stress, the uniform difficulty of the subsequent straightening process on the internal stress is increased, and the internal stress of the plate obtained after the flattening and transverse cutting process is uneven, so that blanking side bending is caused.
In the prior art, the following methods are generally adopted to solve the above problems: (1) straightening for a plurality of times; (2) Selecting a strip with better performance in the middle part of the length of the steel coil; (3) tempering to improve performance and relieve residual stress. All three methods can obviously increase the production cost, and when the residual stress is larger and the uniformity is poor, the tempering treatment can not completely eliminate the stress so as to achieve the requirement of eliminating the side bending.
In order to solve the above problems, the embodiments of the present application provide a method for producing a board and a board, and a specific description will be given below of the method for producing a board provided in the embodiments of the present application with reference to the accompanying drawings.
Referring to fig. 1 in combination, an embodiment of a first aspect of the present application provides a method for producing a board, including:
s1, providing a strip to be rolled;
s2, controlling a hot rolling production line to perform hot rolling, cooling and coiling on the strip to be rolled according to the target plate shape to obtain a coiled material;
s3, cutting the coiled material into a flat shape and transversely cutting the coiled material to obtain the target plate.
The strip to be rolled can be a strip produced by continuous casting. In the hot rolling process, the strip shape is controlled by controlling the roll-running value, the roll bending value, the inclination amount and the like of the working rolls of the rolling mill equipment. The roll shifting value is the movement amount of the working roll along the axial direction of the working roll, the roll shifting of the working roll can adjust the plate shape to a certain extent, the working roll can be uniformly worn, and the excessive deflection of the working roll is reduced. The channeling of the working rolls is divided into positive channeling and negative channeling, wherein positive channeling means that the upper working roll moves towards the driving side and the lower working roll moves towards the operating side, so that the bending degree of the working rolls is increased, and the edge waves can be effectively reduced; the negative channeling means that the upper work roll moves toward the operation side and the lower work roll moves toward the driving side, so that the bending degree of the roll is reduced and the possibility of edge wave generation is increased. The bending value is the bending amount of the working roll, and the bending roll can ensure the flatness of the strip steel and can influence the shape of the strip steel. The bending rollers are divided into positive bending and negative bending, wherein the positive bending is that an upper working roller increases bending force upwards, a lower working roller increases bending force downwards, the bending degree of the working roller is increased, the rolling force is reduced, the thickness of the middle part of the strip steel can be reduced, and the thickness of the edge part is relatively increased; the negative bending is that the upper working roll increases the bending force downwards, the lower working roll increases the bending force upwards, the bending degree of the working roll is reduced, the rolling force is increased, the thickness of the middle part of the strip steel can be increased, and the thickness of the edge part is relatively reduced. And cooling and coiling the hot rolled strip to obtain the coiled material. The coil uncoiling and transverse cutting comprises the procedures of uncoiling, rough straightening, fine straightening, transverse cutting and the like.
Under the condition that the cooling process is unchanged, the shape of the hot rolled strip determines the shape of the cooled strip, namely the shape of the strip before coiling, the coiled material is subjected to continuous cooling phase change in a warehouse after coiling, and the shape of the coiled material is changed at the moment, so that the shape of a certain hot rolled strip and the shape of the cooled strip exist, the shape of the coiled material can be enabled to be flat during uncoiling after the coiled material is subjected to cooling phase change in the warehouse, and the flattening process in the prior art can be eliminated.
According to the production method of the plate, a hot rolling production line is controlled to carry out hot rolling, cooling and coiling on a strip to be rolled according to a target plate shape, so that a coiled material is obtained; and (5) cutting the coiled material into a flat shape and transversely cutting the coiled material to obtain the target plate. Compared with the production method of the plate in the prior art, the flattening process is omitted, the hot rolling process and the flat cutting process are only included, and the hot rolling production line is controlled to roll in the hot rolling process according to the target plate shape. After the flattening process is canceled, the difficulty of rough straightening and fine straightening in the transverse cutting process can be reduced, so that the residual stress after the fine straightening of the plate is smaller, the distribution is more uniform, and the plate is prevented from being bent sideways in the subsequent blanking process.
In some alternative embodiments, the hot rolling line includes rolling mill equipment, cooling equipment, and coiling equipment, S2 includes:
s201, controlling rolling mill equipment to roll a strip to be rolled to obtain a hot rolled strip;
s202, detecting the flatness of the hot rolled strip to obtain a first flatness result;
s203, controlling cooling equipment to cool the hot rolled strip to obtain a cooled strip under the condition that the first flatness result meets a first preset range;
s204, detecting the flatness of the cooled strip to obtain a second flatness result;
and S205, controlling the coiling equipment to coil the cooled strip material to obtain a coiled material under the condition that the second flatness result meets a second preset range.
The hot rolling production line comprises rolling mill equipment, cooling equipment and coiling equipment which are sequentially connected in series. The rolling mill equipment carries out hot rolling on the strip to be rolled according to the target plate shape to obtain a hot rolled strip, and the hot rolled strip is coiled through the coiling equipment after being cooled by the cooling equipment. The cooling apparatus may cool the hot rolled strip using a cooling fluid. And respectively detecting the flatness of the hot rolled strip and the flatness of the cooled strip after hot rolling and cooling, and carrying out subsequent procedures under the condition that the flatness meets the requirement. Alternatively, the flatness of the hot rolled strip is measured by a flatness gauge provided at the outlet of the rolling mill apparatus and the flatness of the cooled strip is measured by a flatness gauge provided at the inlet of the coiling apparatus. In the case that the first flatness result does not satisfy the first preset range or in the case that the second flatness result does not satisfy the second preset range, a subsequent flattening process is required to improve the flatness of the strip.
In these alternative embodiments, the flatness of the hot rolled strip and the flatness of the cooled strip are detected after hot rolling and after cooling, respectively, and the cooling apparatus and the coiling apparatus are controlled to operate based on the detected first flatness result and second flatness result, thereby further ensuring that the flatness of the produced coil meets the target sheet shape requirements.
In some alternative embodiments, the cooling apparatus includes a liquid spray tube, and S203 includes:
and controlling the spray pipe to spray cooling liquid to the surface of the hot rolled strip so as to cool the hot rolled strip and obtain a cooled strip. The cooling liquid can be cooling water, and heat of the hot rolled strip is carried through the cooling water. The spray pipes are arranged to face the surface of the hot rolled strip, and the number of the spray pipes is plural to enlarge the spray area of the cooling liquid so as to improve the cooling effect.
In these alternative embodiments, the hot rolled strip is cooled by spraying a cooling liquid onto the surface of the hot rolled strip through a liquid spray pipe, improving the cooling efficiency.
In some alternative embodiments, the spray tube includes an upper header for spraying the cooling liquid onto the upper surface of the hot strip and a lower header for spraying the cooling liquid onto the lower surface of the hot strip.
In these alternative embodiments, upper and lower headers are provided to spray cooling liquid onto the upper and lower surfaces of the hot rolled strip, respectively, to further increase the cooling efficiency of the cooling apparatus.
In some alternative embodiments, the hot rolled strip includes a first detection zone and two first non-detection zones located at both ends of the first detection zone along a length direction of the hot rolled strip, and S202 includes:
the flatness of a first detection zone of the hot rolled strip is detected, and a first flatness result is obtained.
Optionally, the hot rolled strip includes a first end and a second end along the length of the hot rolled strip, the first end and the second end passing through the cooling apparatus in sequence. The length of the first detection zone of the hot rolled strip was 200m, the length of the first non-detection zone near the first end was 10m, and the remainder was the first non-detection zone near the second end.
In these alternative embodiments, the first flatness result does not include the flatness of the first non-detection zone at both ends, as the area flatness at both ends of the hot rolled strip is poor. The length of flatness detection is reduced, and the detection difficulty is reduced.
In some alternative embodiments, the first flatness result includes a first flatness I Heat of the body The first preset range is-100.ltoreq.I Heat of the body ≤0。
Wherein, the flatness I= (DeltaL/L) x 10 5 I is the shape of strip steel, and represents flatness, and is expressed by an I unit; Δl is the longitudinal extension difference of the strip steel in mm; l is the length of the strip steel datum point, and the unit is mm.
In some alternative embodiments, the cooled strip includes a second detection zone and two second non-detection zones located at opposite ends of the second detection zone along the length of the cooled strip, S204 includes:
and detecting the flatness of a second detection area of the cooled strip, and obtaining a second flatness result.
Optionally, the cooled strip includes a third end and a fourth end along the length of the cooled strip, the third end and the fourth end passing through the coiling apparatus in sequence. The length of the second detection zone of the cooled strip is 200m, the length of the second non-detection zone near the third end is 10m, and the rest is the second non-detection zone near the fourth end.
In some alternative embodiments, along the width direction of the cooled strip, the cooled strip includes a third detection zone and two third non-detection zones located on both sides of the third detection zone, and an overlapping area of the second detection zone and the third detection zone is a target detection zone, S204 includes:
the flatness of the target detection zone of the cooled strip is detected, and a second flatness result is obtained.
Illustratively, the cooling strip includes a plurality of strips, fiber1, fiber2, fiber3 … … Fiber49, fiber50, respectively, at equal intervals along the width of the cooling strip. Wherein Fiber23, fiber24, fiber25, fiber26, fiber27 are located in a third detection zone, fiber1, fiber2, fiber3 … … Fiber21, fiber22 are located in one third non-detection zone, and Fiber28, fiber29, fiber30 … … Fiber49, fiber50 are located in another third non-detection zone. The third detection zone is in the width range of Fiber23 to Fiber27 along the width direction of the cooled strip.
Optionally, the second flatness result includes a second flatness I Cold water The second preset range is not less than 0 and not more than I Cold water ≤60。
To further illustrate the method of producing the sheet material provided in the examples of the present application, the following examples are set forth.
Providing a strip to be rolled, wherein the brand of the strip to be rolled is LG700T, the thickness is 3 mm-5 mm, the width is 1200 mm-1600 mm, and the yield strength is 700Mpa.
And controlling a hot rolling production line according to the target plate shape to perform hot rolling, cooling and coiling on the strip to be rolled to obtain a coiled material. At the outlet of the rolling mill plantFlatness of the hot rolled strip and the cooled strip is detected by a flatness meter arranged at the position of the coiling equipment and the inlet of the coiling equipment to obtain a first flatness I Heat of the body And a second flatness I Cold water . Wherein the first flatness I Heat of the body The first preset range is required to be satisfied, namely-100 is less than or equal to I Heat of the body Less than or equal to 0, and a second flatness I Cold water The second preset range is more than or equal to 0 and less than or equal to I Cold water ≤60。
In the first flatness I Heat of the body Does not satisfy the first preset range or the second flatness I Cold water And under the condition that the second preset range is not met, a leveling procedure is added subsequently, and the working rolls of the rolling equipment are adjusted to adjust the flatness of the hot rolled strip or the cooled strip.
And under the condition that the first flatness I heat meets the first preset range of-100 ℃ and is less than or equal to 0 and the second flatness I cold meets the second preset range of 0 ℃ and is less than or equal to 60, opening and transversely cutting coiled materials coiled by coiling equipment to obtain the target plate. The thickness of the produced plate is 3 mm-5 mm, the width is 250mm, the length is 10000mm, the plate has no side bending phenomenon, and the internal stress distribution is relatively uniform.
An embodiment of a second aspect of the present application provides a sheet material manufactured by the method for manufacturing a sheet material according to any one of the embodiments of the first aspect, where residual stress in the sheet material is small and distributed uniformly, and the sheet material has good performance, and is prevented from being bent sideways in a subsequent blanking process. Optionally, the plate has a thickness of 4mm, a width of 250mm, a length of 10000mm and a yield strength of 700MPa.
These examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and claimed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, which are intended to be included in the scope of the present application.
Claims (10)
1. A method of producing a sheet material, comprising:
providing a strip to be rolled;
controlling a hot rolling production line according to a target plate shape to carry out hot rolling, cooling and coiling on the strip to be rolled to obtain a coiled material;
and (5) cutting the coiled material into a flat and transverse cut to obtain the target plate.
2. The method for producing a sheet according to claim 1, wherein the hot rolling line includes a rolling mill apparatus, a cooling apparatus, and a coiling apparatus, and the controlling the hot rolling line to hot-roll, cool, and coil the strip to be rolled according to a target plate shape to obtain a coil, comprising:
controlling the rolling mill equipment to roll the strip to be rolled to obtain a hot rolled strip;
detecting the flatness of the hot rolled strip to obtain a first flatness result;
controlling the cooling equipment to cool the hot rolled strip under the condition that the first flatness result meets a first preset range to obtain a cooled strip;
detecting the flatness of the cooled strip to obtain a second flatness result;
and controlling the coiling equipment to coil the cooling strip material under the condition that the second flatness result meets a second preset range, so as to obtain the coiled material.
3. The method of producing sheet material according to claim 2, wherein the cooling apparatus includes a liquid spray pipe, and the controlling the cooling apparatus to cool the hot rolled strip to obtain a cooled strip includes:
and controlling the spray pipe to spray cooling liquid to the surface of the hot rolled strip so as to cool the hot rolled strip, thereby obtaining a cooled strip.
4. A method of producing a sheet according to claim 3, wherein the spray pipe includes an upper header for spraying the cooling liquid onto an upper surface of the hot rolled strip and a lower header for spraying the cooling liquid onto a lower surface of the hot rolled strip.
5. The method of producing a sheet according to claim 2, wherein the hot rolled strip includes a first detection zone and two first non-detection zones located at both ends of the first detection zone along a length direction of the hot rolled strip, the detecting flatness of the hot rolled strip to obtain a first flatness result, comprising:
and detecting the flatness of the first detection area of the hot rolled strip to obtain a first flatness result.
6. The method of producing a sheet material according to claim 2, wherein the first flatness result comprises a first flatness I Heat of the body The first preset range is-100 less than or equal to I Heat of the body ≤0。
7. The method of claim 2, wherein the cooled strip includes a second detection zone and two second non-detection zones located at opposite ends of the second detection zone along the length of the cooled strip, wherein detecting the flatness of the cooled strip to obtain a second flatness result comprises:
detecting the flatness of the second detection zone of the cooled strip, obtaining a second flatness result.
8. The method of claim 7, wherein the cooled strip includes a third detection zone and two third non-detection zones located on both sides of the third detection zone in a width direction of the cooled strip, an overlapping area of the second detection zone and the third detection zone is a target detection zone, and detecting flatness of the cooled strip to obtain a second flatness result includes:
and detecting the flatness of the target detection area of the cooled strip, and obtaining a second flatness result.
9. The method of producing a sheet material according to claim 8, wherein the second flatness result comprises a second flatness I Cold water The second preset range is 0 to or less than I Cold water ≤60。
10. A sheet material produced by the method for producing a sheet material according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310412650.6A CN116475226A (en) | 2023-04-17 | 2023-04-17 | Production method of plate and plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310412650.6A CN116475226A (en) | 2023-04-17 | 2023-04-17 | Production method of plate and plate |
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| Publication Number | Publication Date |
|---|---|
| CN116475226A true CN116475226A (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310412650.6A Pending CN116475226A (en) | 2023-04-17 | 2023-04-17 | Production method of plate and plate |
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| Country | Link |
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| CN (1) | CN116475226A (en) |
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2023
- 2023-04-17 CN CN202310412650.6A patent/CN116475226A/en active Pending
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