CN115625199A - Method for improving roller mark on surface of ultrathin strip steel - Google Patents
Method for improving roller mark on surface of ultrathin strip steel Download PDFInfo
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- CN115625199A CN115625199A CN202211185722.XA CN202211185722A CN115625199A CN 115625199 A CN115625199 A CN 115625199A CN 202211185722 A CN202211185722 A CN 202211185722A CN 115625199 A CN115625199 A CN 115625199A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 73
- 239000010959 steel Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000005096 rolling process Methods 0.000 claims abstract description 91
- 238000005266 casting Methods 0.000 claims abstract description 54
- 230000009467 reduction Effects 0.000 claims abstract description 21
- 238000005098 hot rolling Methods 0.000 claims abstract description 18
- 239000000498 cooling water Substances 0.000 claims abstract description 10
- 230000001276 controlling effect Effects 0.000 claims description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000011946 reduction process Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 10
- 238000012797 qualification Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 7
- 238000005246 galvanizing Methods 0.000 description 5
- 238000009749 continuous casting Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000024121 nodulation Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000195 production control method Methods 0.000 description 1
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- 230000011218 segmentation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
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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
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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
- B21B37/48—Tension control; Compression control
-
- 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
- B21B37/76—Cooling control on the run-out table
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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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a method for improving roll marks on the surface of ultrathin strip steel. The method at least improves and even avoids the roll mark defect of the ultrathin strip steel produced by the double-roll casting by adjusting the parameters of the thickness of the cast strip, the convexity of the cast strip, the temperature of the cast strip, the air flow of a hot box, the tension before rolling, the cooling water quantity of a rolling mill, the initial rolling reduction and the reduction rate of the rolling mill and the like. The method mainly comprises the steps of adjusting the thickness of a casting belt to 1.8-2.0 mm, the convexity of the casting belt to 35-80 mu m, the temperature of the casting belt to 1050-1200 ℃, and the air flow of a hot box to 100-200 m 3 H, the tension of the strip steel before the rolling mill is 2.0 to 3.5MPa, and the initial rolling reduction is 15 to 25 percentAnd the initial rolling reduction rate is 0.6-0.9 mm/s. Through one or more of the measures, the problem of the roll mark of the ultrathin strip steel hot rolling can be effectively improved, the roll mark judging rate is effectively reduced, and the qualification rate of ultrathin strip steel products is improved.
Description
Technical Field
The invention belongs to the technical field of steel production, relates to a control technology of the shape of an ultrathin hot-rolled strip steel, and particularly relates to a method for improving the roll mark on the surface of the ultrathin strip steel.
Background
A process for producing ultra-thin band steel by twin-roll thin-band continuous casting includes such steps as casting the molten liquid steel by a pair of opposite rotating casting rolls to obtain a cast band with thickness less than 2.5mm, feeding the thin cast band between the rolls of rolling mill by guide roll and pinch roll, and rolling by rolling mill to obtain ultra-thin hot-rolled band steel with thickness less than 1.5 mm.
Because the thickness of the cast strip is extremely thin, the difficulty of hot rolling is greatly increased, the thin strip steel is extremely easy to crush and damage the roller in the pressing process of the rolling mill, and the surface defect of the roller is copied to the surface of the rolled strip in the subsequent rolling process to form a continuous roll mark. Such defects typically last about 400 tons of product throughout the twin roll casting process, creating serious production quality problems.
At present, domestic research on roll mark problems mainly focuses on aspects such as multi-frame hot continuous rolling, a galvanizing process, a heat treatment furnace and the like, mainly solves the aspects of roll marks caused by a strip threading process, roll marks caused by galvanizing sink roll marks, furnace bottom nodulation and the like, and does not relate to the aspect of double-roll casting ultrathin strip steel roll mark rolling, but the methods cannot be used for solving the roll marks generated in the double-roll casting rolling process.
The Chinese patent CN103468919B reduces the roll mark on the surface of the steel plate by adjusting the temperature gradient in the quenching furnace and the swing speed of the steel plate in the furnace, and the Chinese patent CN103710518B informs the roll mark on the surface of the steel plate by controlling the roller way nodulation in the heating furnace, and the two technologies solve the problem of the roll mark generated in the heat treatment process of the thick plate. The Chinese patent CN106893958B and the Chinese patent CN107779803B solve the roller mark on the steel surface in the galvanizing production process by respectively modifying a hopper automatic spraying dust-settling system of a galvanizing unit and detecting and modifying a sink roller. The Chinese patent CN110976516B eliminates the roll marks on the surface of the multi-pass hot continuous rolling strip steel by adjusting the descaling water spraying mode and improving the temperature of the head of the strip steel. The chinese patent CN112986277B is a method for solving the roll mark, which is not proposed in the patent, and performs feature matching on sub-blocks at the same position in each segmentation map by splicing images acquired by a camera and segmenting according to the circumference of a roll, so as to improve the accuracy of roll mark statistics and detection.
Therefore, in the prior art, the solution to the roll mark is concentrated on the production processes of hot continuous rolling, galvanizing, leveling and the like, and no relevant solution is disclosed for one-time hot rolling production process of a double-roll casting and rolling process, particularly the roll mark problem of initial rolling. Therefore, the technology for solving the roll mark on the surface of the ultrathin hot rolled strip steel produced by the twin-roll casting is still in the technical vacancy in the field.
Disclosure of Invention
The invention aims to provide a production control method for improving and even avoiding roller marks on the surface of ultrathin strip steel. The method of the invention effectively solves the roll mark defect generated in the rolling mill pressing-down process after the hot rolling threading of the ultrathin strip steel is finished by controlling the convexity, thickness, temperature and surface state of the hot rolling incoming material in one pass and controlling the tension before rolling, the rolling mill pressing-down speed, the rolling pressing-down amount and the cooling water amount of the rolling mill in the hot rolling initial rolling pressing-down process, avoids the generation of the batch continuous roll mark defect in the production process of the ultrathin strip steel, and obviously improves the surface quality and the product percent of pass of the ultrathin hot rolling strip steel. Meanwhile, the method of the invention also effectively reduces the economic loss caused by surface defects.
The purpose of the invention is realized by the following technical scheme:
according to a first aspect of the present invention, a method for improving roll marks on the surface of an ultra-thin strip steel is provided, the method comprising:
in a twin roll casting process:
(1) Controlling the thickness of the cast strip within the range of 1.8-2.0 mm;
(2) Controlling the convexity of the casting belt within the range of 35-80 mu m;
before the cast strip enters the hot rolling mill:
(3) Controlling the temperature of the cast strip within 1050-1200 ℃;
(4) Controlling the air flow of the protective atmosphere of the hot box to be 100-200 m 3 A range of/h;
(5) Controlling the tension of the strip steel before the rolling mill within the range of 2.0-3.5 MPa;
during the rolling reduction process of the hot rolling mill:
(6) Controlling the cooling water quantity of the rolling mill within the range of 50-80%;
(7) Controlling the initial rolling reduction to be within the range of 15-25%;
(8) The start rolling reduction rate of the hydraulic cylinder of the rolling mill is controlled within the range of 0.6-0.9 mm/s.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (1) preferably further comprises the following steps: adjusting the pressure of the casting roller hydraulic cylinder to control the casting rolling force to be in the range of 1500-4000N; and/or controlling the casting speed in the range of 40-70 m/min to control the thickness of the cast strip in the range of 1.8-2.0 mm.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (2) preferably further comprises the following steps: the surface profile of the casting rolls and the roll profile crown of the casting rolls are adjusted to control the strip profile crown in the range of 40 to 65 μm.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (3) preferably further comprises the following steps: regulating the nitrogen flow in the hot box to 1000-2500 m 3 H, so as to control the temperature of the cast strip before entering the rolling mill to be within the range of 1050-1150 ℃.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (4) preferably further comprises the following steps: controlling the air flow of the protective atmosphere of the hot box to be 120-160 m 3 The range of/h.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (4) preferably further comprises the following steps: the thickness of the scale before the cast strip enters the rolling mill is controlled within the range of 7-13 mu m.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (5) preferably further comprises the following steps: the tension of the strip steel before entering the rolling mill is controlled within the range of 2.0-3.0 MPa.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (6) preferably further comprises the following steps: controlling the flow of cooling water of the rolling mill to be 65-80% so as to accelerate the establishment of the thermal crown of the roller.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (7) preferably further comprises the following steps: the roll gap of the rolling mill is controlled so as to control the initial rolling reduction within the range of 18-25%.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (8) preferably further comprises the following steps: the initial rolling reduction rate of the hot rolling mill is controlled within the range of 0.7-0.85 mm/s.
According to the method for improving the roll mark on the surface of the ultrathin strip steel, the step (7) or the step (8) preferably further comprises the following steps: the surface profile of the roller is adjusted, and the convexity of the roller is controlled to be 40-90 mu m.
According to a second aspect of the invention, a hot-rolled thin strip is proposed, which is produced with a controlled surface rolling mark by the method described above.
According to the hot-rolled thin steel strip of the present invention, it is preferable that the hot-rolled ultrathin steel strip has a pass rate of roll mark of not more than 1.0%.
Advantageous technical effects
Compared with the prior art, the invention has the technical advantages and beneficial technical effects that at least:
the method effectively solves the technical problem of the roll mark of the initial rolling in the double-roll casting process by controlling the performance, the initial rolling reduction parameters and the like of the ultrathin cast strip. More specifically, the method avoids the roll mark defect of the ultrathin strip steel produced by the double-roll casting by adjusting the parameters of the thickness of the cast strip, the convexity of the cast strip, the temperature of the cast strip, the air flow of a hot box, the tension before rolling, the cooling water quantity of a rolling mill, the initial rolling reduction and the reduction rate of the rolling mill and the like.
Drawings
In order to more clearly describe the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is to be understood that the drawings in the following description are directed to only some embodiments of the invention and are not intended as a definition of the limits of the invention.
FIG. 1 is a schematic view of roll marks on the surface of an ultrathin strip steel in the prior art;
FIG. 2 is a schematic view of the surface of the ultra-thin steel strip improved by the method of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
When thin strip steel is produced by twin-roll casting, the thickness of the cast strip is extremely thin, and after the cast strip enters a hot rolling mill, the rolling process of the hot rolling mill generates compressive stress deformation on the thin strip steel at high temperature, so that the wide strip steel is easily rolled unevenly along the width direction, the strip steel is locally seriously extruded, and the strip steel is broken or waved to form wounds on the surface of a roller and is pressed on the surface of the hot rolled thin strip steel again to form continuous batch roll marks, as shown in fig. 1.
Example 1
And (3) casting the qualified molten steel into a continuous casting strip through a pair of rotating casting rollers, controlling the casting rolling force to be 1600N and the casting speed to be 65m/min to obtain a casting strip with the thickness of 1.86mm, and controlling the convexity of the obtained casting strip to be 58um according to the adjusted surface profile of the casting rollers. And the cast strip is led out of the casting roll and enters a hot rolling mill through a hot box. Before the rolling of the roller, the flow rate of nitrogen in a hot box is adjusted to 1390m3/h, the temperature of the cast strip before entering a rolling mill is controlled to 1080 ℃, the flow rate of oxygen in the hot box is adjusted to 150m3/h, an oxide skin with the thickness of 10um is formed on the surface of the cast strip before entering the rolling mill, and the tension of the strip steel before rolling is adjusted to 2.2MPa. The convexity of the roller is controlled to be 65um through the roller profile of the roller designed in advance. In the initial rolling reduction process, the cooling water quantity of the rolling mill is adjusted to be 65%, the hydraulic cylinder of the rolling mill is adjusted to be formed, the initial rolling reduction is controlled to be 20%, and the initial rolling reduction rate is 0.82mm/s. The ultra-thin strip produced by twin roll casting according to this example had a smooth surface and no continuous roll mark defects, as shown in fig. 2. Further, the roll mark determination rate was 0.6% after the improvement of the method of example 1.
Example 2
And (3) casting the qualified molten steel into a continuous casting strip through a pair of rotating casting rollers, controlling the casting rolling force to be 3800N and the casting speed to be 55m/min to obtain a casting strip with the thickness of 1.82mm, and controlling the convexity of the obtained casting strip to be 46 mu m according to the adjusted surface profile of the casting rollers. And the cast strip is led out of the casting roll and enters a hot rolling mill through a hot box. Before the rolling of the roller, the nitrogen flow in the hot box is adjusted to be 1980m3/h, the temperature of the cast strip before entering the rolling mill is controlled to be 1105 ℃, the oxygen flow in the hot box is adjusted to be 130m3/h, an oxide skin with the thickness of 8um is formed on the surface of the cast strip before entering the rolling mill, and the tension of the strip steel before rolling is adjusted to be 2.9MPa. The convexity of the roller is controlled to be 51um through the roller profile of the roller designed in advance. In the initial rolling reduction process, the cooling water quantity of the rolling mill is adjusted to 78%, the hydraulic cylinder of the rolling mill is adjusted to form, the initial rolling reduction is controlled to be 24%, and the initial rolling reduction rate is 0.80mm/s. The ultra-thin strip produced by twin roll casting according to this example had a smooth surface and no continuous roll mark defects. The roll mark determination rate was 0.5% after the improvement of the method of example 2.
Example 3
And (3) casting the qualified molten steel into a continuous casting strip through a pair of rotating casting rolls, controlling the casting rolling force to be 2600N and the casting speed to be 48m/min to obtain the casting strip with the thickness of 1.89mm, and controlling the convexity of the obtained casting strip to be 62um according to the adjusted surface profile of the casting rolls. And the cast strip is led out of the casting roll and enters a hot rolling mill through a hot box. Before the rolling of the roller is pressed down, the flow rate of nitrogen in the hot box is adjusted to be 2350m & lt 3 & gt/h, the temperature of the cast strip before entering the rolling mill is controlled to be 1145 ℃, the flow rate of oxygen in the hot box is adjusted to be 155m & lt 3 & gt/h, an oxide skin with the thickness of 12 mu m is formed on the surface of the cast strip before entering the rolling mill, and meanwhile, the tension of the strip steel before rolling is adjusted to be 2.6MPa. The convexity of the roller is controlled to be 86um through the roller profile of the roller designed in advance. In the initial rolling reduction process, the cooling water quantity of the rolling mill is adjusted to be 72%, the hydraulic cylinder of the rolling mill is adjusted to be formed, the initial rolling reduction is controlled to be 22%, and the initial rolling reduction rate is 0.71mm/s. The ultra-thin strip produced by twin roll casting according to this example had a smooth surface and no continuous roll mark defects. The roll mark determination rate was 0.2% after the improvement of the method of example 3.
The foregoing is directed to embodiments of the present invention and it is noted that various modifications and adaptations of the invention may occur to those skilled in the art without departing from the scope and spirit of the invention.
Claims (13)
1. A method for improving the roll mark on the surface of ultrathin strip steel is characterized by comprising the following steps:
in a twin roll casting process:
(1) Controlling the thickness of the cast strip within the range of 1.8-2.0 mm;
(2) Controlling the convexity of the cast strip within the range of 35-80 mu m;
before the cast strip enters the hot rolling mill:
(3) Controlling the temperature of the cast strip to be 1050-1200 ℃;
(4) Controlling the air flow of the protective atmosphere of the hot box to be 100-200 m 3 A range of/h;
(5) Controlling the tension of the strip steel before the rolling mill within the range of 2.0-3.5 MPa;
during the rolling reduction process of the hot rolling mill:
(6) Controlling the cooling water quantity of the rolling mill within the range of 50-80%;
(7) Controlling the initial rolling reduction to be within the range of 15-25%;
(8) The start rolling reduction rate of the hydraulic cylinder of the rolling mill is controlled within the range of 0.6-0.9 mm/s.
2. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 1, wherein the step (1) further comprises:
adjusting the pressure of a casting roller hydraulic cylinder to control the casting rolling force within the range of 1500-4000N; and/or
Controlling the casting speed within the range of 40-70 m/min,
so as to control the thickness of the cast strip within the range of 1.8 to 2.0 mm.
3. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 1, wherein the step (2) further comprises:
the surface profile of the casting rolls and the roll profile crown of the casting rolls are adjusted to control the strip profile crown in the range of 40 to 65 μm.
4. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 1, wherein the step (3) further comprises:
regulating the nitrogen flow in the hot box to 1000-2500 m 3 H, so as to control the temperature of the cast strip before entering the rolling mill to be within the range of 1050-1150 ℃.
5. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 1, wherein the step (4) further comprises:
controlling the air flow of the protective atmosphere of the hot box at 120-160 m 3 The range of/h.
6. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 1, wherein the step (4) further comprises:
the thickness of the scale before the cast strip enters the rolling mill is controlled within the range of 7-13 mu m.
7. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 1, wherein the step (5) further comprises:
the tension of the strip steel before entering the rolling mill is controlled within the range of 2.0-3.0 MPa.
8. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 1, wherein the step (6) further comprises:
controlling the cooling water flow of the rolling mill to be 65-80% so as to accelerate the establishment of the hot crown of the roller.
9. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 1, wherein the step (7) further comprises:
the roll gap of the rolling mill is controlled so as to control the initial rolling reduction within the range of 18-25%.
10. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 1, wherein the step (8) further comprises:
the initial rolling reduction rate of the hot rolling mill is controlled within the range of 0.7-0.85 mm/s.
11. The method for improving the roll mark on the surface of the ultra-thin strip steel as claimed in claim 9 or 10, wherein the step (7) or the step (8) further comprises:
the surface profile of the roller is adjusted, and the convexity of the roller is controlled to be 40-90 mu m.
12. Hot-rolled thin strip steel, characterized in that the hot-rolled thin strip steel is roll-marked during production by a method according to any one of claims 1 to 11.
13. The hot-rolled thin strip steel as claimed in claim 12, wherein the hot-rolled ultrathin strip steel has a pass rate of not more than 1.0%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211185722.XA CN115625199A (en) | 2022-09-27 | 2022-09-27 | Method for improving roller mark on surface of ultrathin strip steel |
| PCT/CN2023/111244 WO2024066739A1 (en) | 2022-09-27 | 2023-08-04 | Method for ameliorating roll marks on surface of ultrathin strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211185722.XA CN115625199A (en) | 2022-09-27 | 2022-09-27 | Method for improving roller mark on surface of ultrathin strip steel |
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| CN115625199A true CN115625199A (en) | 2023-01-20 |
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| CN202211185722.XA Pending CN115625199A (en) | 2022-09-27 | 2022-09-27 | Method for improving roller mark on surface of ultrathin strip steel |
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| WO (1) | WO2024066739A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066739A1 (en) * | 2022-09-27 | 2024-04-04 | 江苏省沙钢钢铁研究院有限公司 | Method for ameliorating roll marks on surface of ultrathin strip steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101223107B1 (en) * | 2010-12-24 | 2013-01-17 | 주식회사 포스코 | Apparatus for manufacturing martensitic stainless hot rolled steel strip and method for manufacturing martensitic stainless hot rolled steel strip |
| CN107186185A (en) * | 2017-04-27 | 2017-09-22 | 酒泉钢铁(集团)有限责任公司 | A kind of two phase stainless steel double roll strip casting rolling production process |
| CN109731913B (en) * | 2019-02-21 | 2020-07-24 | 江苏沙钢集团有限公司 | Method for reducing rolling force of rolling mill of double-roller continuous casting production line |
| CN110976516B (en) * | 2019-12-30 | 2021-07-02 | 唐山市德龙钢铁有限公司 | Rolling method for eliminating roll marks on surface of hot-rolled strip steel |
| CN112296285B (en) * | 2020-09-18 | 2022-04-05 | 江苏沙钢集团有限公司 | Method for improving wrinkles of double-roller cast-rolled thin strip |
| CN114850212B (en) * | 2022-04-27 | 2024-04-12 | 首钢智新迁安电磁材料有限公司 | Method for eliminating roll mark defect on surface of strip steel in cold rolling process |
| CN115625199A (en) * | 2022-09-27 | 2023-01-20 | 张家港中美超薄带科技有限公司 | Method for improving roller mark on surface of ultrathin strip steel |
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2022
- 2022-09-27 CN CN202211185722.XA patent/CN115625199A/en active Pending
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| WO2024066739A1 (en) * | 2022-09-27 | 2024-04-04 | 江苏省沙钢钢铁研究院有限公司 | Method for ameliorating roll marks on surface of ultrathin strip steel |
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| WO2024066739A1 (en) | 2024-04-04 |
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