CN106140826A - A kind of steel-plate shape control method - Google Patents
A kind of steel-plate shape control method Download PDFInfo
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- CN106140826A CN106140826A CN201510206455.3A CN201510206455A CN106140826A CN 106140826 A CN106140826 A CN 106140826A CN 201510206455 A CN201510206455 A CN 201510206455A CN 106140826 A CN106140826 A CN 106140826A
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Abstract
The present invention provides a kind of steel-plate shape control method, and three-level computer system is according to squaring coefficient μ=ratio of elongation/(broadening ratio-1)2=(steel plate target length/charge length)/((steel plate target width/blank width)-1)2Computing formula, calculates the μ value of slab to be rolled: two-level computer system selects rolling strategy according to μ value, if μ≤20, uses the 3T rolling mode of axial rolling-transverse rolling-axial rolling；If μ ＞ 20, then use the 2T rolling mode of axial rolling-transverse rolling.The present invention can be effectively improved the specification shape of steel plate, ensure the rectangular dimension of steel plate, during reducing steel plate flame cutting, the narrowest defect occurs, reduce plate size stock rate, the stock rate making the narrowest reason of steel plate cause is reduced to 0.03% by 0.16%, thus plate quality qualification rate is greatly improved, reduce stock loss, increase business economic income.
Description
Technical field
The invention belongs to steel rolling process technical field, particularly relate to a kind of heat that can avoid the occurrence of the narrowest defect when flame cutting
Roll the board-shape control method of strip.
Background technology
Certain factory's slab 5500 production line fire cutting process is in actual production process, and continue the appearance batch the narrowest stock of Q345GJC steel plate
After, occur in that again the situation that batch furnace shell steel ALK490 steel plate is the narrowest., broadening ratio thick and above for 40mm is more than 1.7
Steel plate all use the 3T rolling strategy of axial rolling-transverse rolling-axial rolling, and the broadening ratio of this kind of steel plate is all not up to 3T rolling requirements
Broadening ratio, by technical Analysis, the squaring degree of steel plate is jointly acted on ratio of elongation by broadening ratio and is formed.Therefore,
Only rely on broadening ratio numerical value at present to judge to use the method for 3T rolling can not fully meet on-the-spot actual requirement.
Summary of the invention
The present invention provides a kind of steel-plate shape control method, and its purpose is intended to, by introducing squaring coefficient, improve steel-plate shape,
Avoid the narrowest defect during steel plate flame cutting, improve plate quality qualification rate, reduce plate size stock rate.
To this end, the technical solution that the present invention is taked is:
A kind of steel-plate shape control method, it is characterised in that:
(1) in three-level computer system, input squaring coefficient μ computing formula, calculate the squaring coefficient of slab to be rolled
Value μ:
μ=ratio of elongation/(broadening ratio-1)2
=(steel plate target length/charge length)/((steel plate target width/blank width)-1)2
(2) two-level computer system selects rolling strategy according to μ value, if μ≤20, uses the 3T of axial rolling-transverse rolling-axial rolling
Rolling mode；If μ ＞ 20, then use the 2T rolling mode of axial rolling-transverse rolling.
The invention have the benefit that
The present invention can be effectively improved the specification shape of steel plate, it is ensured that the rectangular dimension of steel plate, goes out during reducing steel plate flame cutting
The narrowest defect, reduces plate size stock rate, and the stock rate making the narrowest reason of steel plate cause is reduced to 0.03% by 0.16%,
Thus plate quality qualification rate is greatly improved, reduce stock loss, increase business economic income.
Detailed description of the invention
Steel-plate shape control method of the present invention, mainly by introducing squaring coefficient μ, and according to the calculating of squaring coefficient μ
Value, takes different rolling modes, with the generation of defect the narrowest during reducing steel plate flame cutting.Its method particularly includes:
1, in three-level computer system, squaring coefficient μ is inputted:
μ=ratio of elongation/(broadening ratio-1)2
=(steel plate target length/charge length)/((steel plate target width/blank width)-1)2
2, two-level computer system selects rolling strategy according to the value of calculation of μ, if μ≤20, uses axial rolling-transverse rolling-axial rolling
3T rolling mode；If μ ＞ 20, then use the 2T rolling mode of axial rolling-transverse rolling.
Embodiment 1:
Certain steel blank specification is 200 × 1800 × 4031mm, and target rolling specs is 22 × 3265 × 20202mm, specifically calculates
Situation is:
μ=(steel plate target length/charge length)/((steel plate target width/blank width)-1)2
=(20202/4031)/((3265/1800)-1)2
=7.6
Due to μ≤20, therefore use the 3T rolling mode of axial rolling-transverse rolling-axial rolling.Steel plate head and middle width after rolling
Difference actual measurement is 15mm, the narrowest situation of steel plate does not occurs.
Embodiment 2:
Certain steel blank specification is 250 × 1800 × 3180mm, and target rolling specs is 12 × 3095 × 36590mm, specifically counts
Calculation situation is:
μ=(steel plate target length/charge length)/((steel plate target width/blank width)-1)2
=(36590/3180)/((3095/1800)-1)2
=22.2
Due to μ ＞ 20, therefore use the 2T rolling mode of axial rolling-transverse rolling.Steel plate head and the actual measurement of middle stand out after rolling
For 20mm, the narrowest situation of steel plate does not occurs.
Claims (1)
1. a steel-plate shape control method, it is characterised in that:
(1) in three-level computer system, input squaring coefficient μ computing formula, calculate slab to be rolled
Squaring coefficient value μ:
μ=ratio of elongation/(broadening ratio-1)2
=(steel plate target length/charge length)/((steel plate target width/blank width)-1)2
(2) two-level computer system selects rolling strategy according to μ value, if μ≤20, uses axial rolling-transverse rolling
The 3T rolling mode of-axial rolling；If μ ＞ 20, then use the 2T rolling mode of axial rolling-transverse rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206455.3A CN106140826A (en) | 2015-04-27 | 2015-04-27 | A kind of steel-plate shape control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206455.3A CN106140826A (en) | 2015-04-27 | 2015-04-27 | A kind of steel-plate shape control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106140826A true CN106140826A (en) | 2016-11-23 |
Family
ID=57346763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510206455.3A Pending CN106140826A (en) | 2015-04-27 | 2015-04-27 | A kind of steel-plate shape control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106140826A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5467546A (en) * | 1977-11-08 | 1979-05-31 | Kawasaki Steel Co | Plate rolling method |
| SU1328010A1 (en) * | 1985-09-11 | 1987-08-07 | Донецкий научно-исследовательский институт черной металлургии | Sheet rolling method |
| CN103752622A (en) * | 2013-12-23 | 2014-04-30 | 宝山钢铁股份有限公司 | Heavy plate rolling control method for removing defect on edge of continuous casting bloom |
| CN104138920A (en) * | 2014-06-26 | 2014-11-12 | 济钢集团有限公司 | Method for manufacturing rolled metal composite plate with pipeline steel as base material |
| CN104148405A (en) * | 2014-08-21 | 2014-11-19 | 柳州钢铁股份有限公司 | Plate shape control method in broadening phase of medium thickness plate |
-
2015
- 2015-04-27 CN CN201510206455.3A patent/CN106140826A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5467546A (en) * | 1977-11-08 | 1979-05-31 | Kawasaki Steel Co | Plate rolling method |
| SU1328010A1 (en) * | 1985-09-11 | 1987-08-07 | Донецкий научно-исследовательский институт черной металлургии | Sheet rolling method |
| CN103752622A (en) * | 2013-12-23 | 2014-04-30 | 宝山钢铁股份有限公司 | Heavy plate rolling control method for removing defect on edge of continuous casting bloom |
| CN104138920A (en) * | 2014-06-26 | 2014-11-12 | 济钢集团有限公司 | Method for manufacturing rolled metal composite plate with pipeline steel as base material |
| CN104148405A (en) * | 2014-08-21 | 2014-11-19 | 柳州钢铁股份有限公司 | Plate shape control method in broadening phase of medium thickness plate |
Non-Patent Citations (5)
| Title |
|---|
| 《轧钢新技术3000问》编委会: "《轧钢新技术3000问》", 31 August 2005, 中国科学技术出版社 * |
| 张景进等: "《中厚板生产实训》", 30 April 2013, 冶金工业出版社 * |
| 李春福等: "利用平面板形控制提高厚板的成材率", 《鞍山钢铁学院学报》 * |
| 蒋铭才等: "中厚板轧制展宽新公式推导及其应用", 《轧钢》 * |
| 马家骥等: "中板板形控制及数学模型", 《河北冶金》 * |
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Application publication date: 20161123 |