CN116689507A - Control method for reducing warping degree of hot-rolled strip steel - Google Patents
Control method for reducing warping degree of hot-rolled strip steel Download PDFInfo
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- CN116689507A CN116689507A CN202310752649.8A CN202310752649A CN116689507A CN 116689507 A CN116689507 A CN 116689507A CN 202310752649 A CN202310752649 A CN 202310752649A CN 116689507 A CN116689507 A CN 116689507A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 92
- 239000010959 steel Substances 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims abstract description 24
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 238000012821 model calculation Methods 0.000 claims abstract description 6
- 238000004364 calculation method Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 238000013000 roll bending Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 11
- 239000002253 acid Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000033764 rhythmic process Effects 0.000 abstract description 3
- 238000005097 cold rolling Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 230000037303 wrinkles Effects 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- 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
- 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of 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
- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a control method for reducing the warping degree of hot rolled strip steel, which comprises the steps of firstly, calculating by a formula; setting convexity of the plate; step three, model calculation: step four, coiling degree adjustment; step five, convexity debugging; step six, adjusting the water spraying proportion; and step seven, changing the flatness. The invention improves the phenomenon of overlarge uncoiling warp of the strip steel at normal temperature by reducing the coiling convexity, standardizing the water spraying proportion of the upper surface and the lower surface, controlling according to middle waves and the like, simultaneously avoids serious warping defects in the front half section of uncoiling of the steel coil, eliminates serious crease defects on the surface after flattening, solves the problems that the head and tail parts are difficult to weld when the acid rolling mill on the machine of a subsequent cold rolling mill continuously uses cold rolling materials and influences the rolling rhythm, and improves the quality of products processed by the strip steel.
Description
Technical Field
The invention relates to the technical field of hot-rolled strip steel production, in particular to a control method for reducing the warping degree of hot-rolled strip steel.
Background
The strip shape control of the hot rolled strip steel mainly controls the strip convexity of the strip steel, namely, the flow of metal is controlled by utilizing the deformation of the strip steel in the rolling process, the flatness and the strip convexity index are fed back through a multifunctional instrument of a finish rolling outlet, and a released steel coil is judged whether to meet standard requirements or not through curves, but the strip shape defects such as serious buckling, unilateral waves, bilateral waves, middle waves and the like appear after the steel curls are uncoiled to a user, so that the use of the user is seriously influenced, and the control method for reducing the warping degree of the hot rolled strip steel is needed to be used for adjusting the transverse warping degree of the strip steel when the production operation of the hot rolled strip steel is carried out.
The existing method has the problems that the warping defect is generated in the first half section of uncoiling of the steel coil and is inconvenient to eliminate the wrinkle defect generated on the leveled surface when the hot rolled steel is processed, and meanwhile, the defect can cause the difficulty in welding the head and the tail when the cold rolled material is used for continuous rolling by a subsequent acid rolling machine set, the rolling rhythm is influenced, and the quality of processing operation by using strip steel is reduced, so that the control method for reducing the warping degree of the hot rolled strip steel is required to be invented.
Disclosure of Invention
The invention aims to provide a control method for reducing the warping degree of hot rolled strip steel, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a control method for reducing the warping degree of hot rolled strip steel comprises the steps of firstly, calculating by a formula; setting convexity of the plate; step three, model calculation: step four, coiling degree adjustment; step five, convexity debugging; step six, adjusting the water spraying proportion; step seven, changing the flatness;
in the first step, in order to quantitatively represent the transverse warping degree of the strip steel, so as to facilitate transverse comparison of the strip steel with the thickness of 2.0-5.0mm, a concept of warping degree is provided, which is represented by symbol ζ, and the expression is as follows:the warping degree is represented, delta and B, H are respectively the bending deflection of the strip in the width direction, the width of the strip steel and the thickness of the strip steel, and the subsequent calculation of the steel transverse warping degree can be facilitated by substituting a formula into the collected data of the strip steel, so that the subsequent scientific rigor of the steel transverse warping degree calculation is ensured;
in the second step, as the coiling length increases, the coiling diameter increases, the accumulated coiling warpage also increases, and in order to avoid the situation, the convexity setting is changed twice in the middle of coiling respectively, so as to realize the step convexity control of the whole coil steel, but the adjustment amplitude cannot be too large, the total amplitude reduction is within 40% of the initial target convexity, and the influence on the levelness of the subsequent steel strip caused by poor flatness due to overlarge adjustment is prevented;
in the third step, the convexity of the target plate in the PDI issuing data is sent to the secondary model for calculation, the calculation result of the PCFC is estimated according to the target convexity through the secondary model, the target convexity which is expected to be achieved is calculated according to the conditions of equipment state, product specification, production period and the like, and the scientific reliability of the calculation result can be ensured by using the secondary model for calculating the data;
in the fourth step, the preset target convexity is automatically controlled on site by means of rolling force, rack water spraying, roll bending force and the like, and when the roll is coiled to a certain distance, the roll is at about 1/3 position, the target convexity is changed on the basis of original setting and issuing, and a certain proportion is reduced;
in the fifth step, when the steel strip is coiled to the 2/3 position, the target convexity is changed again on the basis of the original setting, and then a certain proportion is reduced, so that the metal fatigue of the steel strip caused by overlarge curling value is avoided, and convenience is provided for reducing the warping degree of the steel strip subsequently;
in the sixth step, under the condition of the same water supply and discharge ratio, the temperature gradient in the thickness direction of the strip steel with the thickness of 2.0-5.0mm is increased along with the increase of the thickness, and the warping height is also increased, so that the cooling water quantity and the water supply and discharge ratio are required to be determined according to the thickness of the strip steel in actual production, the subsequent strip steel can be ensured to be slowly cooled by strictly controlling the using quantity of the cooling water, and the strip steel is prevented from being deformed easily after being cooled;
in the seventh step, in the rolling setting, the target flatness of the strip steel after rolling is changed, so that the strip steel has a slight medium wave trend, the influence of uneven cooling can be restrained, and the strip steel can recover to be flat when the strip steel is cooled to room temperature although a certain amount of medium waves exist after rolling.
Preferably, the step six changes the coiling state by the method of on-line adjusting the convexity of the plate, prevents the convexity of the coil from being overlarge, and simultaneously can avoid the occurrence of stress deformation of the coil in the process of inhibiting the subsequent cooling of the coil by strictly controlling the water spraying proportion, thereby ensuring the stabilizing effect of the subsequent cooling of the coil.
Preferably, in the step seven, the phenomenon of overlarge strip steel uncoiling warp at normal temperature is improved by reducing the coiling convexity, standardizing the water spraying proportion of the upper surface and the lower surface, controlling according to middle waves and the like, the problem of poor plate shape after uncoiling by a user is solved, the leveling and repairing proportion is reduced, the cost is saved, the objection rate is reduced, and the subsequent strip steel uncoiling warp is ensured.
Compared with the prior art, the invention has the beneficial effects that:
the control method for reducing the warping degree of the hot rolled strip steel improves the phenomenon of overlarge warping degree of the strip steel during uncoiling at normal temperature by reducing the curling degree, standardizing the water spraying proportion of the upper surface and the lower surface, controlling according to middle waves and the like, solves the problem of poor plate shape after uncoiling by a user, simultaneously reduces the force leveling and repairing proportion, saves the cost for processing the strip steel subsequently, improves the economic benefit for the production operation by using the strip steel, simultaneously avoids the serious warping defect in the front half section of uncoiling the strip steel, eliminates the serious crease defect on the flattened surface, solves the problem that the welding of the head and the tail parts is difficult when the cold rolled material is continuously rolled by using a follow-up acid rolling machine set caused by the defect, influences the rolling rhythm, simultaneously avoids the problem that the middle part of the upper surface is easy to generate transverse crease defect and seriously influences the apparent quality when the strip steel is used in commodity use, and improves the quality of products processed by using the strip steel subsequently.
Drawings
FIG. 1 is a schematic view of example 1 of a sheet convexity data table of a control method for reducing the warp of a hot rolled strip according to the present invention;
FIG. 2 is a schematic diagram of example 1 of a water spray ratio data table of a control method for reducing warp of a hot rolled strip according to the present invention;
FIG. 3 is a schematic diagram of example 1 showing a calculation formula of a control method for reducing the warp of a hot rolled strip according to the present invention;
FIG. 4 is a schematic view of example 1 showing a water spray pattern of a control method for reducing the warp of a hot rolled strip according to the present invention;
FIG. 5 is a schematic diagram of example 1 of a two-stage model calculation flow chart of a control method for reducing the warp of a hot rolled strip according to the present invention;
FIG. 6 is a schematic diagram of example 1 of a two-stage model calculation flow chart of a control method for reducing the warp of a hot rolled strip according to the present invention;
FIG. 7 is a schematic view of example 2 showing a construction flow diagram of a control method for reducing warp of a hot rolled strip according to the present invention;
FIG. 8 is a schematic construction flow diagram of a control method for reducing the warp of a hot rolled strip according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, 2, 3, 4, 5, 6, 7 and 8, an embodiment of the present invention is provided:
example 1
In order to achieve the above purpose, the present invention provides the following technical solutions: a control method for reducing the warping degree of hot rolled strip steel comprises the steps of firstly, calculating by a formula; setting convexity of the plate; step three, model calculation: step four, coiling degree adjustment; step five, convexity debugging; step six, adjusting the water spraying proportion; step seven, changing the flatness;
referring to fig. 1, 2, 3, 4, 5, 6,
in fig. 3, in order to quantitatively represent the transverse warping degree of the strip steel, and facilitate transverse comparison of the strip steel with the thickness of 2.0-5.0mm, a concept of warping degree is proposed, which is represented by symbol ζ, and the expression is:representing the warpage, wherein delta and B, H are bending deflection of the strip in the width direction, the width of the strip steel and the thickness of the strip steel respectively;
with the increase of the coiling length, the coiling diameter is increased, the accumulated coiling warping degree is also increased, in order to avoid the situation, the convexity setting is respectively changed twice in the middle of coiling, the step convexity control of the whole coil steel is realized, but the adjustment amplitude cannot be too large, the total reduction amplitude is within 40% of the original target convexity, and the occurrence of poor flatness due to overlarge adjustment is prevented, wherein the flatness refers to a measurement index of the degree of the coincidence between the steel rail and the horizontal plane;
in fig. 5 and 6, the target convexity in the PDI issuing data is sent to the secondary model for calculation, and then the secondary model calculates the expected target convexity according to the calculation result of the target convexity estimation model PCFC and the conditions of equipment state, product specification, production period and the like;
the method is characterized in that the method automatically realizes the control of the preset target convexity by means of rolling force, rack water spraying, roller bending force and the like on site, and when the rolling is carried out to a certain distance, the rolling takes up about 1/3 position, the target convexity is changed on the basis of original setting and issuing, and a certain proportion is reduced;
in fig. 1, when coiling is carried out to the 2/3 position, the target convexity is changed again on the basis of the original setting and issuing, and then a certain proportion is reduced, so that the metal fatigue of the steel belt caused by overlarge curling value is avoided, convenience is provided for reducing the warping degree of the steel belt subsequently, and the coiling tension is set to be the lower limit control of the specification.
The defects of loose coil or staggered layer are avoided;
in fig. 2, under the same condition of lower water supply ratio, the temperature gradient in the thickness direction is increased along with the increase of the thickness, and the warping height is also increased, so that the cooling water amount and the lower water supply ratio are required to be determined according to the thickness of the strip steel in actual production, different water spray ratios are summarized according to different thickness specifications of Q235B, the upper water spray ratio and the lower water spray ratio of laminar cooling are properly adjusted according to the original condition, and the adjustment range is properly adjusted according to the actual coiling state of different steel types of different specifications, so that a ship-shaped plate is avoided;
in fig. 4, in the rolling setting, the target flatness after rolling of the strip steel is changed, so that the strip steel has a slight medium wave trend, the influence of uneven cooling can be restrained, and the strip steel has a certain amount of medium waves after rolling, but the strip steel is restored to be flat when reaching the room temperature, so that the slight medium wave rolling strategy is applied in actual production. For thin strip steel below 3mm, taking Q235B as an example, the setting value of micro-medium waves (flatness target value): setting 15I with the thickness of 2.0-2.5 mm; setting 12I with the length of 2.5-2.75 mm; setting 6I to 2.76-3.0 mm, the effect is better in actual control at present.
Example 2:
referring to figures 7 and 8 of the drawings,
the coiling state is changed by the method of on-line adjusting the convexity of the plate, so that the convexity is prevented from being excessively large, and meanwhile, the occurrence of stress deformation of the steel coil in the process of inhibiting the subsequent cooling of the steel coil can be avoided by strictly controlling the water spraying proportion, and the stable effect of the subsequent cooling of the steel coil is ensured.
The phenomenon of overlarge uncoiling warp of the strip steel at normal temperature is improved by reducing the coiling convexity, standardizing the water spraying proportion of the upper surface and the lower surface, controlling according to middle waves and the like, the problem of poor plate shape after uncoiling by a user is solved, the leveling and repairing proportion is reduced, the cost is saved, the objection rate is reduced, and the uncoiling warp of the subsequent strip steel is ensured.
The present invention is not described in detail in the present application, and is well known to those skilled in the art.
Finally, what is to be described is: the above detailed description is only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the examples, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (3)
1. A control method for reducing the warping degree of hot rolled strip steel comprises the steps of firstly, calculating by a formula; setting convexity of the plate; step three, model calculation: step four, coiling degree adjustment; step five, convexity debugging; step six, adjusting the water spraying proportion; step seven, changing the flatness; the method is characterized in that:
in the first step, in order to quantitatively represent the transverse warping degree of the strip steel, so as to facilitate transverse comparison of the strip steel with the thickness of 2.0-5.0mm, a concept of warping degree is provided, which is represented by symbol ζ, and the expression is as follows:representing the warpage, wherein delta and B, H are bending deflection of the strip in the width direction, the width of the strip steel and the thickness of the strip steel respectively;
in the second step, as the coiling length increases, the coiling diameter increases, and the accumulated coiling warpage also increases, so as to avoid the situation, the convexity setting is respectively changed twice in the middle of coiling, thereby realizing the step convexity control of the whole coil steel, but the adjustment amplitude cannot be too large, the total reduction amplitude is within 40% of the initial target convexity, and the poor flatness caused by overlarge adjustment is prevented;
in the third step, the convexity of the target plate in the PDI issuing data is sent to the secondary model for calculation, and then the secondary model is used for calculating the expected target convexity according to the calculation result of the PCFC (target convexity estimation model) and the conditions of equipment state, product specification, production period and the like;
in the fourth step, the preset target convexity is automatically controlled on site by means of rolling force, rack water spraying, roll bending force and the like, and when the roll is coiled to a certain distance, the roll is at about 1/3 position, the target convexity is changed on the basis of original setting and issuing, and a certain proportion is reduced;
in the fifth step, when the steel strip is coiled to the 2/3 position, the target convexity is changed again on the basis of the original setting, and then a certain proportion is reduced, so that the metal fatigue of the steel strip caused by overlarge curling value is avoided, and convenience is provided for reducing the warping degree of the steel strip subsequently;
in the sixth step, under the same condition of the lower water ratio, the temperature gradient in the thickness direction of the strip steel with the thickness of 2.0-5.0mm increases along with the increase of the thickness, and the warping height increases along with the increase of the thickness, so that the cooling water amount and the lower water ratio are required to be determined according to the thickness of the strip steel in actual production;
in the seventh step, in the rolling setting, the target flatness of the strip steel after rolling is changed, so that the strip steel has a slight medium wave trend, the influence of uneven cooling can be restrained, and the strip steel has a certain amount of medium waves after rolling, so that the strip steel can be conveniently restored to be flat when the strip steel is subsequently cooled to room temperature.
2. The control method for reducing the warp of a hot rolled strip as claimed in claim 1, wherein: and step six, the coiling state is changed by a method of online adjusting convexity of the plate with the thickness of 2.0-5.0mm, so that the convexity is prevented from being too large, and meanwhile, the occurrence of stress deformation of the steel coil in the process of inhibiting the subsequent cooling of the steel coil can be avoided by strictly controlling the water spraying proportion, and the stable effect of the subsequent cooling of the steel coil is ensured.
3. The control method for reducing the warp of a hot rolled strip as claimed in claim 1, wherein: and step seven improves the phenomenon of overlarge strip steel uncoiling warp at normal temperature by reducing the convexity of the coil with the thickness of 2.0-5.0mm, normalizing the water spraying proportion of the upper surface and the lower surface, controlling according to middle waves and the like, solves the problem of poor plate shape after uncoiling by a user, reduces the leveling and repairing proportion, saves the cost, reduces the objection rate and ensures the uncoiling warp of the subsequent strip steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310752649.8A CN116689507A (en) | 2023-06-26 | 2023-06-26 | Control method for reducing warping degree of hot-rolled strip steel |
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| CN202310752649.8A CN116689507A (en) | 2023-06-26 | 2023-06-26 | Control method for reducing warping degree of hot-rolled strip steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117443931A (en) * | 2023-12-22 | 2024-01-26 | 冶科金属有限公司 | Austenitic stainless steel rolling equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117443931A (en) * | 2023-12-22 | 2024-01-26 | 冶科金属有限公司 | Austenitic stainless steel rolling equipment |
| CN117443931B (en) * | 2023-12-22 | 2024-02-20 | 冶科金属有限公司 | Austenitic stainless steel rolling equipment |
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