CN101456037A - Heavy steel plate flatness controlling method - Google Patents
Heavy steel plate flatness controlling method Download PDFInfo
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- CN101456037A CN101456037A CNA2007101984192A CN200710198419A CN101456037A CN 101456037 A CN101456037 A CN 101456037A CN A2007101984192 A CNA2007101984192 A CN A2007101984192A CN 200710198419 A CN200710198419 A CN 200710198419A CN 101456037 A CN101456037 A CN 101456037A
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Abstract
The invention discloses a method for controlling the planeness of a thick steel plate, which comprises the following steps: (1) heating process, during which the height of the hearth bottom is guaranteed to accord with the requirement of the prescription; meanwhile, the heating temperature of steel ingot and proximate matter is even so that the steel ingot and the proximate matter are burnt; (2) rolling process, during which a steel plate is transversely placed, and the upper surface temperature and the lower surface temperature of the steel plate are even so as to prevent the steel plate from upwarping or buckling downwards; (3) leveling a roll table, during which the height difference between a lower working roller and a front breast roll and a rear breast roll is adjusted so that the lower working roller is higher than the front breast roll and the rear breast roll by 0 to 35 mm; and (4) matching the rolling speed with the operation speed of the roll table in the rolling process. The method of the invention is adopted to control the planeness of the thick steel plate so that the thick steel plate is heated and rolled without straightening and planishing, and the planeness accords with the requirement of standard, saves time and labor, and greatly improves the work efficiency. The test result shows that the planeness of the steel plate produced by the method of the invention basically satisfies the standard requirement, and the requirement of a customer on the product quality.
Description
Technical field
The present invention relates to a kind of system control method of heavy steel plate flatness.
Background technology
Heavy Plate Plant generally all uses straightener to align to steel plate wooden dipper song, but for thickness greater than 100mm, even greater than the steel plate of 200mm, straightener just can't be aligned, only reliable press flattens, and adopts press to align, promptly time-consuming effort again, and production run is brought considerable influence, also had influence on the contractual delivery phase simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of control method of heavy steel plate flatness, with accomplish steel plate the heating, rolling after, need not align pressing, glacing flatness just meets standard-required.
To achieve these goals, technical program of the present invention lies in adopting a kind of control method of heavy steel plate flatness, may further comprise the steps:
(1) heating process: guarantee the requirement up to specification of furnace bottom height, simultaneously, make steel ingot, base heating-up temperature even, so that its saturating burning;
(2) operation of rolling: the horizontal placing flat of steel plate, and make on the steel plate following table temperature even, in case upwarp during steel plate rolling or button down;
(3) roller-way absolute altitude: adjust the difference in height of bottom working roll and front and back breast roll, make bottom working roll exceed 0-35mm than front and back breast roll;
When (4) rolling, the mill speed and the roller-way speed of service are complementary.
In the heating process of step (1), the reply soaking pit is regularly scraped slag, to guarantee the requirement up to specification of furnace bottom height.
In the step (2), horizontal flat for the necessary piece piece of the horizontal flat steel plate of energy, can not can carry out horizontal flat at ordinary times according to plate shape situation by horizontal stroke by horizontal flat steel plate.
In the step (2), for watering the steel plate that water for cooling is returned, can not be rolling immediately, steel plate should be placed on and suitably return temperature on the roller-way, make on the steel plate following table temperature even, in case upwarp during steel plate rolling or button down.
Adopt the inventive method that the glacing flatness of steel plate is controlled, make steel plate heating, rolling after, need not align pressing, glacing flatness just meets standard-required, and is time saving and energy saving, operating efficiency improves greatly.
Result of the test shows: the steel plate glacing flatness that adopts method of the present invention to produce can both meet standard-required substantially, satisfies the demand of client to the product quality in kind.
The specific embodiment
Present embodiment is that the steel plate glacing flatness of 27.60 tons rolling 240 * 2200 * 4660mm of Q235B steel ingot is controlled, and may further comprise the steps:
(1) heating process: 27.60 tons Q235B steel ingot belongs to I group steel, and heating process is as follows: total 15 hours heat time heating times, wherein temperature retention time is 9.5 hours, and the steel ingot holding temperature is 1300 ℃, goes up 20 ℃ of the following table temperature difference when coming out of the stove;
(2) rolling specs is 240 * 2200 * 4660mm, and trimmed size can not horizontally be put down greater than milling train body of roll full-size 4200mm; Carry out horizontal flat when rolling 400mm when rolling; The steel that dries in the air when being rolled down to 300mm, temperature arrives 940 ℃, is rolled down to finished size during 10 ℃ of the last following table temperature difference;
When (3) this was rolling, bottom working roll was than the high 30mm of breast roll;
When (4) mill speed and the roller-way speed of service all are 1m/s, plate shape is good, when mill speed during greater than 1m/s, phenomenon appears upwarping in steel plate, and velocity contrast is big more, and it is serious more then to upwarp phenomenon, when mill speed during less than 1m/s, button phenomenon down appears in steel plate, and velocity contrast is big more, and then the button phenomenon is serious more down.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1, a kind of control method of heavy steel plate flatness is characterized in that: may further comprise the steps:
(1) heating process: guarantee the requirement up to specification of furnace bottom height, make steel ingot, base heating-up temperature even simultaneously, so that its saturating burning;
(2) operation of rolling: the horizontal placing flat of steel plate, and make on the steel plate following table temperature even;
(3) roller-way absolute altitude: adjust the difference in height of bottom working roll and front and back breast roll, make bottom working roll exceed 0-35mm than front and back breast roll;
When (4) rolling, the mill speed and the roller-way speed of service are complementary.
2, the control method of heavy steel plate flatness according to claim 1 is characterized in that: in the heating process of step (1), the reply soaking pit is regularly scraped slag, to guarantee the requirement up to specification of furnace bottom height.
3, the control method of heavy steel plate flatness according to claim 1 is characterized in that: horizontal flat in the step (2) for the necessary piece piece of the horizontal flat steel plate of energy, can not can carry out horizontal flat at ordinary times according to plate shape situation by horizontal stroke by horizontal flat steel plate.
4, the control method of heavy steel plate flatness according to claim 1 is characterized in that: in the step (2), for watering the steel plate that water for cooling is returned, can not be rolling immediately, steel plate should be placed on and suitably return temperature on the roller-way, make on the steel plate following table temperature even, in case upwarp during steel plate rolling or button down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101984192A CN101456037A (en) | 2007-12-11 | 2007-12-11 | Heavy steel plate flatness controlling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101984192A CN101456037A (en) | 2007-12-11 | 2007-12-11 | Heavy steel plate flatness controlling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101456037A true CN101456037A (en) | 2009-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101984192A Pending CN101456037A (en) | 2007-12-11 | 2007-12-11 | Heavy steel plate flatness controlling method |
Country Status (1)
| Country | Link |
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| CN (1) | CN101456037A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618402B (en) * | 2008-06-30 | 2011-04-13 | 宝山钢铁股份有限公司 | Method for controlling planeness of cold-rolling strip steel |
| CN101992218B (en) * | 2009-08-25 | 2013-05-01 | 鞍钢股份有限公司 | Method for correcting cold-rolled strip steel shape control target value |
| CN103736742A (en) * | 2013-12-26 | 2014-04-23 | 秦皇岛首秦金属材料有限公司 | Medium plate surface longitudinal edge crack control method |
| CN112496085A (en) * | 2020-11-06 | 2021-03-16 | 邯郸钢铁集团有限责任公司 | Production method for improving edge wave defect of 1500 MPa-level hot-rolled ultrahigh-strength steel |
-
2007
- 2007-12-11 CN CNA2007101984192A patent/CN101456037A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618402B (en) * | 2008-06-30 | 2011-04-13 | 宝山钢铁股份有限公司 | Method for controlling planeness of cold-rolling strip steel |
| CN101992218B (en) * | 2009-08-25 | 2013-05-01 | 鞍钢股份有限公司 | Method for correcting cold-rolled strip steel shape control target value |
| CN103736742A (en) * | 2013-12-26 | 2014-04-23 | 秦皇岛首秦金属材料有限公司 | Medium plate surface longitudinal edge crack control method |
| CN112496085A (en) * | 2020-11-06 | 2021-03-16 | 邯郸钢铁集团有限责任公司 | Production method for improving edge wave defect of 1500 MPa-level hot-rolled ultrahigh-strength steel |
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| PB01 | Publication | ||
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Open date: 20090617 |