CN113070348A - Control method for edge rib of cold-rolled steel strip - Google Patents
Control method for edge rib of cold-rolled steel strip Download PDFInfo
- Publication number
- CN113070348A CN113070348A CN202110305078.4A CN202110305078A CN113070348A CN 113070348 A CN113070348 A CN 113070348A CN 202110305078 A CN202110305078 A CN 202110305078A CN 113070348 A CN113070348 A CN 113070348A
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- Prior art keywords
- steel strip
- rolling
- cold
- rib
- control
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 238000005098 hot rolling Methods 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005097 cold rolling Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000000498 cooling water Substances 0.000 claims abstract description 7
- 238000007689 inspection Methods 0.000 claims abstract description 6
- 239000011324 bead Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008520 organization Effects 0.000 abstract description 4
- 238000007726 management method Methods 0.000 description 3
- 230000003449 preventive effect Effects 0.000 description 2
- 230000003442 weekly effect Effects 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance 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
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a control method of a rib at the edge of a cold-rolled steel strip, which is characterized in that the generation reasons of the rib are carefully analyzed from five aspects of man, machine, material, method and ring according to quality influence factors, and finally an effective control means is formulated, and the method comprises the following steps: the hot rolling and the cold rolling are required to be arranged according to the organization of a production plan from wide to narrow so as to improve the uniformity of the transverse thickness of the steel strip; before producing cold rolling base materials, the hot rolling needs to strictly control the rolling kilometers of a roller so as to ensure the control of the convexity; the wedge shape and the convexity are controlled within a reasonable range during hot rolling, so that the same plate difference of a steel strip is reduced; the point inspection of equipment is enhanced, good operation of cooling water of the working roll and a finish rolling water scraper is ensured, and phenomena such as blockage, water leakage and the like are avoided, so that uniform cooling of the working roll and a steel strip is ensured; the rib forming defect is finally reduced from 0.48% to 0.03% through multi-aspect control, and a good effect is achieved.
Description
Technical Field
The invention relates to the technical field of steel rolling processes, in particular to a method for controlling a rib at the edge of a cold-rolled steel strip.
Background
The convex ribs are also called ribs, are distributed in the longitudinal direction of the steel strip, are brightened from the side surface of the steel strip when the defect part is seen visually, and have a convex feeling when touched by hands; the rib forming is that the plate difference control of wedge shape, convexity and the like is poor in the production control due to hot rolling, and after the plate difference control is poor, the local effect is amplified on a steel coil due to the superposition effect in the coiling process after the plate difference control is performed by acid rolling, so that the visible and hand-feeling rib defect is generated.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a method for controlling the edge bead of the cold-rolled steel strip, so that the edge bead of the cold-rolled steel strip is effectively controlled.
In order to solve the technical problems, the invention adopts the following technical scheme:
a control method for the edge bead of a cold-rolled steel strip comprises the following steps:
the hot and cold rolling production plan must be strictly organized according to the principle from wide to narrow;
before the cold rolling base material is produced, the number of kilometers of a roller of the hot rolling base material cannot exceed 60 kilometers;
the hot rolling is carried out while controlling the wedge within + -20 μm and the crown within 20-60 μm.
Furthermore, the point inspection of the equipment is enhanced, good operation of the cooling water of the working roll and the finish rolling water hanging plate is ensured, and blockage and water leakage are prevented, so that the uniform cooling of the working roll and the steel strip is ensured.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention effectively controls the edge convex edges of the cold-rolled steel strip by the organization arrangement of the production plan, the limitation of the number of kilometers rolled by the roller, the control of the wedge shape and the convexity, the control of the cooling water of the working roller and the monitoring of the states of the finish rolling water-hanging plate, and effectively reduces the defect of the convex edges from 0.48 percent to 0.03 percent.
Detailed Description
The invention effectively solves the problem of the rib defect of the steel belt by controlling the production plan organization, the equipment precision and the equipment state; the invention respectively carries out data statistics and tracking on the influence factors generating the convex edges from the quality influence factors and the six aspects of human, machine, material, method, ring and measurement by using a fishbone diagram method, and finally locks the solidification from the aspects of production plan, wedge shape, convexity, working roll cooling water, finish rolling water hanging plates and the like, and the concrete content is as follows: the hot rolling and cold rolling production plan must strictly carry out organization arrangement according to the principle from wide to narrow so as to improve the uniformity of the transverse thickness of the steel strip; before producing cold rolling base materials, the hot rolling needs to strictly control the rolling kilometers of a roller so as to ensure the control of the convexity; the wedge shape and the convexity are controlled within a reasonable range during the rolling of the hot rolling, and the same plate difference of the steel strip is reduced; the point inspection of the equipment is enhanced, the good operation of the cooling water of the working roll and the finish rolling water hanging plate is ensured, the phenomena of blockage, water leakage and the like are prevented, and the uniform cooling of the working roll and the steel strip is ensured.
A control method for the edge bead of a cold-rolled steel strip comprises the following steps:
1. production plan
Organizing and arranging the production plan according to the principles and ideas of overall planning of the moon, flexibly adjusting the week plan and strictly executing the day plan; the method specifically comprises the following steps: the monthly orders of the next month are arranged in advance at the end of each month, and are combined with the maintenance plan of the next month, so that the service cycle of the wide and narrow band steel and the roller is effectively planned, and the hot and cold rolling production plans must be organized and arranged strictly according to the principle from wide to narrow; the weekly plan arrangement of the next month is made according to the overall plan of the monthly plan, the weekly production completion condition and the equipment running state, and the principle is that the steel grades with higher production difficulty are produced in groups in two weeks before the month as far as possible, so that the follow-up and next-month production is guaranteed;
2. wedge shape and convexity
The wedge shape and the convexity are controlled mainly for good ductility and uniformity in the width direction in the steel strip rolling process and avoiding the phenomenon of large local deviation, the C40 wedge shape is controlled within +/-20 mu m according to a large amount of data accumulation analysis, and the convexity is controlled within 20-60 mu m; in addition, because the abrasion of the roller is gradually increased along with the increase of the rolling kilometer number, in order to ensure that the cold-rolled product does not have rib defects, the roller kilometer number of the hot rolling can not exceed 60 kilometers before the cold-rolled base material is produced.
3. Device management
Because hot rolling is carried out in a high-temperature state, the uniform cooling of rough rolling and finish rolling working rolls is the primary premise of ensuring that the rolls are not deformed at high temperature, and the preventive management of the working rolls is particularly important in order to avoid the micro deformation of the working rolls caused by the blockage of cooling water of the working rolls and the uneven cooling of the rolls and further to avoid the rib defects; in addition, the local thickness of the steel strip is cooled unevenly due to water leakage of the finish rolling water hanging plate, the cooling coefficient of the steel strip is locally changed, and finally the thickness of the steel strip is deviated in the transverse direction, so that a rib defect is formed; in order to avoid rib defects caused by poor equipment, the rib defects are avoided by adopting a point inspection preventive management mode of pre-production inspection, in-production observation and post-production reexamination.
Experiments prove that the invention effectively reduces the rib defect from 0.48% to 0.03%.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (2)
1. A control method for the edge bead of a cold-rolled steel strip is characterized by comprising the following steps:
the hot and cold rolling production plan must be strictly organized according to the principle from wide to narrow;
before the cold rolling base material is produced, the number of kilometers of a roller of the hot rolling base material cannot exceed 60 kilometers;
the hot rolling is carried out while controlling the wedge within + -20 μm and the crown within 20-60 μm.
2. The method of controlling an edge bead of a cold rolled steel strip as claimed in claim 1 further comprising: the point inspection of the reinforcing equipment ensures the good operation of the cooling water of the working roll and the finish rolling water hanging plate, prevents blockage and water leakage and ensures the uniform cooling of the working roll and the steel strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110305078.4A CN113070348A (en) | 2021-03-17 | 2021-03-17 | Control method for edge rib of cold-rolled steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110305078.4A CN113070348A (en) | 2021-03-17 | 2021-03-17 | Control method for edge rib of cold-rolled steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113070348A true CN113070348A (en) | 2021-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110305078.4A Pending CN113070348A (en) | 2021-03-17 | 2021-03-17 | Control method for edge rib of cold-rolled steel strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113070348A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113664047A (en) * | 2021-08-11 | 2021-11-19 | 山东钢铁集团日照有限公司 | Production method for eliminating local high points of wide and thick hot rolling of cold-rolled material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1159075A (en) * | 1956-01-26 | 1958-06-23 | Inland Steel Co | Manufacture of thin sheets of ferrous products |
| US20110113848A1 (en) * | 2009-11-16 | 2011-05-19 | Quad Engineering Inc. | Methods for reducing ridge buckles and annealing stickers in cold rolled strip and ridge-flattening skin pass mill |
| CN104741409A (en) * | 2015-03-18 | 2015-07-01 | 江苏省沙钢钢铁研究院有限公司 | Control method for continuous annealing non-oriented silicon steel transverse crease mark |
| CN108941209A (en) * | 2018-06-20 | 2018-12-07 | 北京首钢股份有限公司 | A method of control cold-strip steel middle muscle defect |
| CN112453053A (en) * | 2020-09-28 | 2021-03-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for eliminating steel bar rising at finishing machine in production of thin and ultrathin steel strips |
-
2021
- 2021-03-17 CN CN202110305078.4A patent/CN113070348A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1159075A (en) * | 1956-01-26 | 1958-06-23 | Inland Steel Co | Manufacture of thin sheets of ferrous products |
| US20110113848A1 (en) * | 2009-11-16 | 2011-05-19 | Quad Engineering Inc. | Methods for reducing ridge buckles and annealing stickers in cold rolled strip and ridge-flattening skin pass mill |
| CN104741409A (en) * | 2015-03-18 | 2015-07-01 | 江苏省沙钢钢铁研究院有限公司 | Control method for continuous annealing non-oriented silicon steel transverse crease mark |
| CN108941209A (en) * | 2018-06-20 | 2018-12-07 | 北京首钢股份有限公司 | A method of control cold-strip steel middle muscle defect |
| CN112453053A (en) * | 2020-09-28 | 2021-03-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for eliminating steel bar rising at finishing machine in production of thin and ultrathin steel strips |
Non-Patent Citations (4)
| Title |
|---|
| 杨卫东: "《轧钢生产典型案例 热轧与冷轧带钢生产》", 31 July 2018, 冶金工业出版社 * |
| 王宏阳: "热轧带钢亮带***缺控制措施", 《本钢技术》 * |
| 罗云波等: "1780mm热轧带钢凸棱缺陷分析与改善研究", 《2014年全国轧钢生产技术会议文集（上）》 * |
| 罗石念等: "低碳热轧带钢局部高点对冷轧卷起筋的影响", 《2014年全国轧钢生产技术会议文集（上）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113664047A (en) * | 2021-08-11 | 2021-11-19 | 山东钢铁集团日照有限公司 | Production method for eliminating local high points of wide and thick hot rolling of cold-rolled material |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210706 |
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| RJ01 | Rejection of invention patent application after publication |