CN102527735A - Method for controlling even deformation of edge portion in medium-thick board rolling - Google Patents
Method for controlling even deformation of edge portion in medium-thick board rolling Download PDFInfo
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- CN102527735A CN102527735A CN2011104373214A CN201110437321A CN102527735A CN 102527735 A CN102527735 A CN 102527735A CN 2011104373214 A CN2011104373214 A CN 2011104373214A CN 201110437321 A CN201110437321 A CN 201110437321A CN 102527735 A CN102527735 A CN 102527735A
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Abstract
A method for controlling even deformation of an edge portion in medium-thick board rolling belongs to the technical field of medium-thick board rolling. The technical parameters are that the effective using range of roller diameter of a working roller of a roughing mill is 1020-1120mm, and the roller distribution rule is that diameter of an upper working roller is (0-6)mm larger than that of a lower working roller; and parameters in a widening stage of the roughing mill are that largest rolling force is 8500KN, largest torque is 3200KNm, largest pressing down quantity is 40mm, steel biting speed is (1-2)m/s, and rolling speed is (2.5-4.5)m/s. At conditions of the device and set parameters, widening generally requires 3-6 times according to size of the widening ratio; SKI parameter is set to be +8 in first widening, and the rolling speed is linear speed; and range of a second time is set to be +5-+8. The method has the advantages of reducing uneven upper wide and lower narrow deformation of the edge portion of a steel plate, achieving good control on the shape of the edge portion of the steel plate, accordingly being capable of controlling cutting deformation of the steel plate and improving yield of the steel plate.
Description
Technical field
The invention belongs to the Medium and Heavy Plate Rolling technical field, the control method of a kind of Medium and Heavy Plate Rolling limit portion homogeneous deformation particularly is provided.
Background technology
At present cut deal in the operation of rolling because influence factor is more, the difficult control of steel plate limit portion deformation uniformity, steel plate limit portion is rolling be cause the side cut quantity not sufficient easily after the wedge shape and produce roll narrow.Then can reduce yield of steel plate if increase the steel billet inventory, increase the Heavy Plate Production cost virtually.The tradition control method is to burn steel quality or rolling pass and distribute and optimize limit portion shape through improving heating furnace, but effect is unsatisfactory.
Summary of the invention
The object of the present invention is to provide the control method of a kind of Medium and Heavy Plate Rolling limit portion homogeneous deformation; Through adjustment roughing mill broadening stage skis coefficient (following general designation SKI coefficient); Change the steel plate stage upper and lower working roll roller table speed proportioning of nipping, slow down steel plate limit portion " wide at the top and narrow at the bottom " inhomogeneous deformation, realize steel plate limit portion shape excellent control; Thereby control steel plate shear amount improves yield of steel plate.
The heavy and medium plate mill roughing is divided into and is three phases, the passage that promptly is shaped, broadening passage and axial rolling passage.And thereby the broadening passage act as and width of steel billet is rolled into steel plate width realizes that steel plate width accurately controls.The invention provides a kind of steel plate limit portion homogeneous deformation control method.Mainly be through the adjustment steel plate at roughing broadening passage SKI coefficient, optimize the roller table speed proportioning of the upper and lower working roll of milling train, the upper and lower surfaces deformation uniformity improves steel plate limit portion wedge shape when realizing that steel plate is nipped state.
Steel plate limit portion wedge shape mainly is rendered as " wide at the top and narrow at the bottom " phenomenon, shows that steel plate is out of shape greater than lower surface at broadening stage upper surface, and promptly the upper metal flowing velocity is greater than the bottom.In order to increase lower surface metal flow speed, need the broadening of adjustment roughing rationally passage SKI coefficient.The control technology parameter is following in rolling:
The effective scope of application of roughing mill working roll roller diameter is (1020-1120) mm, and joining the roller system is that the top working roll diameter is than bottom working roll diameter big (0-6) mm.At first each major parameter of roughing mill broadening stage is provided with as follows: maximum rolling force 8500KN, peak torque 3200KNm, maximum reduction 40mm, biting speed (0.5-2) m/s, mill speed (2.5-4.5) m/s.Be provided with under the condition at above equipment and parameter, than size, broadening needs the 3-6 passage usually according to the steel plate broadening.Broadening the 1st passage SKI coefficient is set to+and 8, i.e. (V
Lower roll-V
Top roll)/V
Lower rollBe 8% (V
Top rollRepresent the top working roll linear resonance surface velocity, V
Lower rollRepresent the top working roll linear resonance surface velocity), it is+5～+ 8 that second passage is provided with scope, i.e. (V
Lower roll-V
Top roll)/V
Lower rollBe 5%-8%, all the other broadening passages are set according to on-site actual situations: if steel plate head upwarps seriously, then be set to 0～+ 4 since the 2nd passage SKI; Coefficient is+5～+ 8 if steel plate head discount, then follow-up broadening passage continue adjustment SKI.
Suitable specification is steel billet thickness >=220mm and steel plate thickness >=15mm.Suitable steel grade is deck of boat steel (general ship, 32 grades, 36 grades), pipe line steel (L245, X56, X65, X70, X80), general carbon and low-alloy Series Steel (Q235, Q345, Q460C, SM490, S355), container slab (Q245R, Q345R, Q370R, 07MnCrMoVR, 07MnNiMoVD), bridge steel Series Steel easy generation edge fault steel grades such as (Q345q, Q370q, Q420q).
The specific embodiment
Embodiment 1,17.5mm water power steel (Q460C)
Billet bloom size: 250*2000*3750mm
Plate size: 25*2630*28000mm
The broadening stage is totally 3 passages.Preceding 2 passage SKI coefficient settings and top and bottom rolls speed proportioning situation:
| The broadening passage | SKI sets | Top working roll speed m/s | Bottom working roll speed m/s | Lower roll speed and top roll speed ratio value |
| 1 | ?+8 | 1.38 | 1.5 | 1.0870 |
| 2 | ?+5 | 0.881 | 0.927 | 1.0522 |
Embodiment 2,17.5mm pipe line steel (X70)
Billet bloom size: 250*2000*3000mm
Plate size: 17.5*3177*26500mm
The broadening stage is totally 4 passages.Preceding 2 passage SKI coefficient settings and top and bottom rolls speed proportioning situation:
| The broadening passage | SKI sets | Top working roll speed m/s | Bottom working roll speed m/s | Lower roll speed and top roll speed ratio value |
| 1 | ?+8 | 1.52 | 1.65 | 1.0855 |
| 2 | ?+5 | 0.95 | 1.0 | 1.0526 |
After this SKI Coefficient Control mode, steel plate limit portion deformation uniformity is greatly improved.Decreased average shear amount 20mm, and the vertical limit of limit portion defective reconditioning rate such as is split and is reduced significantly.
Claims (3)
1. the control method of Medium and Heavy Plate Rolling limit portion homogeneous deformation is characterized in that, the technical parameter of rolling middle control is following:
The effective scope of application of the roller diameter of roughing mill working roll is 1020-1120mm, and joining the roller system is that the top working roll diameter is than bottom working roll diameter big (0-6) mm;
The parameter in roughing mill broadening stage is provided with as follows: maximum rolling force 8500KN, peak torque 3200KNm, maximum reduction 40mm, biting speed (1-2) m/s, mill speed (2.5-4.5) m/s;
Be provided with under the condition at above equipment and parameter, according to the size of broadening ratio, broadening needs the 3-6 passage usually; Broadening the 1st passage SKI coefficient is set to+and 8, i.e. (V
Lower roll-V
Top roll)/V
Lower rollRatio be 8%, the speed of this roll is linear velocity; It is+5～+ 8 that second passage is provided with scope, i.e. (V
Lower roll-V
Top roll)/V
Lower rollRatio be 5%-8%, all the other broadening passages are set according to on-site actual situations: when steel plate head upwarps seriously, then be set to 0～+ 4 since the 2nd passage SKI; When the steel plate head discount, it is+5～+ 8 that then follow-up broadening passage continues adjustment SKI coefficient.
2. the control method of Medium and Heavy Plate Rolling according to claim 1 limit portion homogeneous deformation is characterized in that the specification of described cut deal is steel billet thickness >=220mm and steel plate thickness >=15mm; Steel grade is deck of boat steel, pipe line steel, general carbon and low-alloy Series Steel, container slab, bridge steel.
3. the control method of Medium and Heavy Plate Rolling according to claim 1 limit portion homogeneous deformation is characterized in that, described deck of boat steel is general ship, 32 grades, 36 grades; Pipe line steel is L245, X56, X65, X70, X80; General carbon and low-alloy Series Steel is Q235, Q345, Q460C, SM490, S355; The container slab is Q245R, Q345R, Q370R, 07MnCrMoVR, 07MnNiMoVD, and the bridge steel Series Steel is Q345q, Q370q, Q420q.
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| CN2011104373214A CN102527735A (en) | 2011-12-23 | 2011-12-23 | Method for controlling even deformation of edge portion in medium-thick board rolling |
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| CN2011104373214A CN102527735A (en) | 2011-12-23 | 2011-12-23 | Method for controlling even deformation of edge portion in medium-thick board rolling |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909216A (en) * | 2012-10-23 | 2013-02-06 | 秦皇岛首秦金属材料有限公司 | Double-stand rolling method for rolling super-thick steel plate by giving consideration to both plate shape and flaw detection performance |
| CN102974624A (en) * | 2012-12-06 | 2013-03-20 | 秦皇岛首秦金属材料有限公司 | Edge plane shape control method of large-expansion-ratio high strength grade pipeline steel |
| CN103008361A (en) * | 2012-12-25 | 2013-04-03 | 内蒙古包钢钢联股份有限公司 | Method for controlling bending of steel plate head |
| CN103230943A (en) * | 2013-04-28 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for improving bending of head portion of medium plate |
| CN103252355A (en) * | 2013-05-06 | 2013-08-21 | 首钢总公司 | Rolling schedule computing method for medium and thick plate controlled rolling |
| CN103302106A (en) * | 2013-07-09 | 2013-09-18 | 济钢集团有限公司 | Thick steel plate straightness improvement method and control method thereof in rolling process |
| CN104959381A (en) * | 2015-07-09 | 2015-10-07 | 首钢总公司 | Predicting method of rolling mill torque in slab rolling process |
| CN106955891A (en) * | 2016-01-08 | 2017-07-18 | 宝山钢铁股份有限公司 | The working roll for being suitable for tandem mills matches somebody with somebody roller method |
| CN107570536A (en) * | 2017-09-15 | 2018-01-12 | 首钢集团有限公司 | A kind of method of TMCP bridge steel plates plate shape control |
| CN114042752A (en) * | 2021-11-10 | 2022-02-15 | 山东钢铁集团日照有限公司 | Treatment process of large-thickness small-size blank and application thereof |
| CN115305330A (en) * | 2022-07-28 | 2022-11-08 | 鞍钢股份有限公司 | Shape control method for 460 MPa-grade thick steel plate with thickness greater than 50mm |
| CN115338271A (en) * | 2022-07-12 | 2022-11-15 | 安阳钢铁股份有限公司 | Method for improving warping buckle head of rolled piece |
| CN115463976A (en) * | 2022-08-11 | 2022-12-13 | 包头钢铁（集团）有限责任公司 | Method for improving rectangle degree of transverse section of wide and thick steel plate |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909216A (en) * | 2012-10-23 | 2013-02-06 | 秦皇岛首秦金属材料有限公司 | Double-stand rolling method for rolling super-thick steel plate by giving consideration to both plate shape and flaw detection performance |
| CN102909216B (en) * | 2012-10-23 | 2015-01-21 | 秦皇岛首秦金属材料有限公司 | Double-stand rolling method for rolling super-thick steel plate by giving consideration to both plate shape and flaw detection performance |
| CN102974624A (en) * | 2012-12-06 | 2013-03-20 | 秦皇岛首秦金属材料有限公司 | Edge plane shape control method of large-expansion-ratio high strength grade pipeline steel |
| CN102974624B (en) * | 2012-12-06 | 2015-01-21 | 秦皇岛首秦金属材料有限公司 | Edge plane shape control method of large-expansion-ratio high strength grade pipeline steel |
| CN103008361A (en) * | 2012-12-25 | 2013-04-03 | 内蒙古包钢钢联股份有限公司 | Method for controlling bending of steel plate head |
| CN103230943A (en) * | 2013-04-28 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for improving bending of head portion of medium plate |
| CN103230943B (en) * | 2013-04-28 | 2016-04-20 | 内蒙古包钢钢联股份有限公司 | Improve the method for Warping Phenomenon in Plate Rolling Process |
| CN103252355A (en) * | 2013-05-06 | 2013-08-21 | 首钢总公司 | Rolling schedule computing method for medium and thick plate controlled rolling |
| CN103302106B (en) * | 2013-07-09 | 2015-04-08 | 济钢集团有限公司 | Thick steel plate straightness improvement method and control method thereof in rolling process |
| CN103302106A (en) * | 2013-07-09 | 2013-09-18 | 济钢集团有限公司 | Thick steel plate straightness improvement method and control method thereof in rolling process |
| CN104959381A (en) * | 2015-07-09 | 2015-10-07 | 首钢总公司 | Predicting method of rolling mill torque in slab rolling process |
| CN104959381B (en) * | 2015-07-09 | 2017-03-08 | 首钢总公司 | A kind of Forecasting Methodology of slab rolling process milling train moment of torsion |
| CN106955891A (en) * | 2016-01-08 | 2017-07-18 | 宝山钢铁股份有限公司 | The working roll for being suitable for tandem mills matches somebody with somebody roller method |
| CN107570536A (en) * | 2017-09-15 | 2018-01-12 | 首钢集团有限公司 | A kind of method of TMCP bridge steel plates plate shape control |
| CN114042752A (en) * | 2021-11-10 | 2022-02-15 | 山东钢铁集团日照有限公司 | Treatment process of large-thickness small-size blank and application thereof |
| CN115338271A (en) * | 2022-07-12 | 2022-11-15 | 安阳钢铁股份有限公司 | Method for improving warping buckle head of rolled piece |
| CN115305330A (en) * | 2022-07-28 | 2022-11-08 | 鞍钢股份有限公司 | Shape control method for 460 MPa-grade thick steel plate with thickness greater than 50mm |
| CN115305330B (en) * | 2022-07-28 | 2024-05-14 | 鞍钢股份有限公司 | Plate shape control method for 460 MPa-level thick steel plate with thickness of more than 50mm |
| CN115463976A (en) * | 2022-08-11 | 2022-12-13 | 包头钢铁（集团）有限责任公司 | Method for improving rectangle degree of transverse section of wide and thick steel plate |
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Application publication date: 20120704 |