CN107096795A - A kind of manufacture method for reducing edge defects of hot rolled strip steel - Google Patents
A kind of manufacture method for reducing edge defects of hot rolled strip steel Download PDFInfo
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- CN107096795A CN107096795A CN201710367740.2A CN201710367740A CN107096795A CN 107096795 A CN107096795 A CN 107096795A CN 201710367740 A CN201710367740 A CN 201710367740A CN 107096795 A CN107096795 A CN 107096795A
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- carried out
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Classifications
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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
-
- 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
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
-
- 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
-
- 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
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
-
- 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
Abstract
The present invention relates to a kind of manufacture method for reducing edge defects of hot rolled strip steel, including following steps：Computer heating control is carried out, by heating of plate blank to 1190~1230 DEG C；Width model load setting is carried out, roughing width model is calculated according to the thickness width of slab and finished product, the drafts of setting roughing vertical roll and each passage of plain-barreled roll；Roughing vertical roll rolling is carried out, roughing mill E1 and roughing mill E2 set opening degree according to the model calculation, carry out width of plate slab control；Flat rolling is carried out, flat rolling is carried out to the slab after edge rolling, slab thickness is thinned.Technique is carried out in existing Equipment Foundations for present invention tool and control optimizes, no equipment investment；Do not change existing process system and logic control, do not influence present production process to control；To width control system etc., other quality index have no adverse effects.
Description
Technical field
The invention belongs to hot-strip technical field, more particularly to a kind of manufacturer for reducing edge defects of hot rolled strip steel
Method.
Background technology
Hot-strip carries out subtracting width in roughing region by edger roll in the operation of rolling to slab, needed for obtaining strip
Finished width, process as shown in Figure 1.Edger roll lateral pressure amount (10-50mm) is smaller with respect to width of plate slab (1000-1650mm), belongs to
Typical superelevation part problem on deformation, because deformation is difficult infiltration, the center section of width of plate slab is nearly free from plastic deformation, becomes
Shape is concentrated mainly on the regional area of slab edge, it is impossible to which it is wide to penetrate into whole plate, is easily formed not at a certain distance from away from edge
Homogeneous deformation, local thickness's increase is raised, is formed " dog bone ", dash area shape as shown in Figure 2.
Because the characteristics of slab edge temperature is low, stress is high, dog bone parts can be to belt steel surface stream during edge rolling
It is dynamic, belt steel surface is pressed into after length direction tear, edge fault is formed.The formation of edge fault is rolled piece surface corner gold
Category is slided and the coefficient result of down tilt.Pattern as shown in Figure 3.
The presence of edge fault in hot-strip production process, can influence the quality of edges of follow-up cold rolling process product,
The lumber recovery of cold rolling process after influence.So, control the generation of edge fault and reduce its defect level, it is necessary.
In traditional production process, lower column defects are primarily present：
1) increase sizing press (SP) equipment, increases deformation uniformity, makes deformation to infiltration in the middle of width of plate slab, reduces
Dog ostealleosis.Equipment investment is big, and maintenance workload is big；
2) using belt roller shape or the edger roll roll surface of taper.Edger roll difficulty of processing is big, requirement to lathe is high, to different slabs
The bad adaptability of thickness, adds the uneven wear of roll surface.
3) lateral pressure amount of slab is reduced, the load of edger roll is reduced.The dimensions of slab is added, continuous casting working procedure is added
The amount of secondary and abnormal section slab is poured when changing section.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of manufacture method for reducing edge defects of hot rolled strip steel, pass through
Optimize tapping temperature, reduce the load of the passages of E1 first, can effectively reduce the generating capacity and defect level of edge fault.
The technical solution adopted for the present invention to solve the technical problems is：A kind of manufacture for reducing edge defects of hot rolled strip steel
Method, including following steps：
(a) computer heating control is carried out, by heating of plate blank to target tapping temperature；
(b) width model load setting is carried out, roughing width model is calculated according to the thickness width of slab and finished product,
Set roughing vertical roll and the drafts of each passage of plain-barreled roll；
(c) roughing vertical roll rolling is carried out, roughing mill E1 and roughing mill E2 set opening degree according to the model calculation, carried out
Width of plate slab is controlled；
(d) flat rolling is carried out, flat rolling is carried out to the slab after edge rolling, slab thickness is thinned.
The further technical scheme of the present invention is, in the step (a), the tapping temperature of slab is optimized for 1190~
1230℃。
The further technical scheme of the present invention is, in described step (b), reduces the load 1- of the passages of E1 first
5mm, optimization distribution to the passages of E1 the 3rd and E2 first, the 3rd passage.
The further technical scheme of the present invention is, in described step (c), and optimization edger roll cooling water inflow is extremely less than etc.
In 70%.
The further technical scheme of the present invention is, in described step (d), constant set up between plain-barreled roll and edger roll
Power is controlled, and edger roll electric current is no more than 60% of electric current when edger roll stings steel and keeps constant control during control stable rolling.
Beneficial effect
Compared with prior art, the present invention has advantages below：
1st, technique and control optimization, no equipment investment are carried out in existing Equipment Foundations；
2nd, do not change existing process system and logic control, do not influence present production process to control；
3rd, to width control system etc., other quality index have no adverse effects；
4th, the size of slab is not changed, on continuous casting working procedure without influence；
5th, by the use of the invention, edge fault amount is greatly reduced, and reduces the objection generating capacity and internal drop of defect
Level product amount.
Brief description of the drawings
Fig. 1 is rough rolling process schematic diagram.
Fig. 2 is " dog bone " the distressed structure schematic diagram of slab after edge rolling.
Fig. 3 is hot-strip " edge fault " appearance structure schematic diagram.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiment 1
In rolling process of rough rolling as shown in Figure 1, slab, which subtracts wide and 3 liang of passages of E2 edger rolls through 1 liang of passage of E1 edger rolls and subtracts width, to be entered
Line width is controlled；Thickness control is carried out through the pressure of the passage of R1 plain-barreled rolls 2 three and the pressure of the passage of R2 plain-barreled rolls 4 three.
Drafts of the invention by optimizing the passage of E1 edger rolls first, reduces dog bone projection amount, reduces edger roll groove face
Juxtaposition metamorphose, reduce edge metal down tilt be pressed into belt steel surface degree；The present invention is by optimizing tapping temperature to 1190
~1230 DEG C, optimization edger roll cooling water inflow reduces edge temperature drop to 70%, reduces edge metal stresses concentration and causes metal
The degree that belt steel surface is pressed into through down tilt during follow-up flat rolling is torn, the present invention is by optimizing the speed control that edger roll and plain-barreled roll are shown in
System realizes constant tensile control, while controlling edger roll electric current during stable rolling to be no more than 60% of electric current when stinging steel, reduces vertical
The accumulation of roller amount of metal, reduces the juxtaposition metamorphose of edger roll groove face, reduces the degree that edge metal down tilt is pressed into belt steel surface.
From in April, 2016, start to be tried out in the hot rolling line of Ningbo steel 1780, the edge fault amount of changing the original sentence to is reduced
60%, edge fault objection generating capacity reduces 50%, and effect is fine.
Claims (5)
1. a kind of manufacture method for reducing edge defects of hot rolled strip steel, it is characterised in that：Comprise the following steps：
(a) computer heating control is carried out, by heating of plate blank to target tapping temperature；
(b) width model load setting is carried out, roughing width model is calculated according to the thickness width of slab and finished product, set
The drafts of roughing vertical roll and each passage of plain-barreled roll；
(c) roughing vertical roll rolling is carried out, roughing mill E1 and roughing mill E2 set opening degree according to the model calculation, carry out slab
Width control system；
(d) flat rolling is carried out, flat rolling is carried out to the slab after edge rolling, slab thickness is thinned.
2. a kind of manufacture method for reducing edge defects of hot rolled strip steel according to claim 1, it is characterised in that：Described
In step (a), the tapping temperature of slab is optimized for 1190~1230 DEG C.
3. a kind of manufacture method for reducing edge defects of hot rolled strip steel according to claim 1, it is characterised in that：Described
The step of (b) in, reduce the load 1-5mm of the passages of E1 first, optimization distribution is to the passages of E1 the 3rd and E2 first, the 3rd passage.
4. a kind of manufacture method for reducing edge defects of hot rolled strip steel according to claim 1, it is characterised in that：Described
The step of (c) in, optimization edger roll cooling water inflow is to being less than or equal to 70%.
5. a kind of manufacture method for reducing edge defects of hot rolled strip steel according to claim 1, it is characterised in that：Described
The step of (d) in, set up between plain-barreled roll and edger roll constant-tension control, control stable rolling during edger roll electric current be no more than edger roll
When stinging steel electric current 60% and keep constant control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367740.2A CN107096795A (en) | 2017-05-23 | 2017-05-23 | A kind of manufacture method for reducing edge defects of hot rolled strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367740.2A CN107096795A (en) | 2017-05-23 | 2017-05-23 | A kind of manufacture method for reducing edge defects of hot rolled strip steel |
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| CN107096795A true CN107096795A (en) | 2017-08-29 |
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| CN201710367740.2A Pending CN107096795A (en) | 2017-05-23 | 2017-05-23 | A kind of manufacture method for reducing edge defects of hot rolled strip steel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107812786A (en) * | 2017-09-15 | 2018-03-20 | 宁波钢铁有限公司 | A kind of hot rolling technology for being used to produce the electrical sheet without metal flow accumulation defect |
| CN108176717A (en) * | 2017-12-28 | 2018-06-19 | 常熟市龙腾特种钢有限公司 | A kind of hot rolled circular steel Methods of Surface Quality Control |
| CN109365527A (en) * | 2018-11-30 | 2019-02-22 | 湖南华菱湘潭钢铁有限公司 | A kind of milling method of big broadening ratio Wide and Heavy Plates |
| CN111530926A (en) * | 2020-04-27 | 2020-08-14 | 湖南华菱涟源钢铁有限公司 | Control method for peeling edge of strip steel in rough rolling and strip steel |
| CN112916616A (en) * | 2019-09-30 | 2021-06-08 | 日照钢铁控股集团有限公司 | Process for rolling sheet billet checkered plate by common hot-rolled strip steel production line |
| CN114210729A (en) * | 2021-11-16 | 2022-03-22 | 首钢智新迁安电磁材料有限公司 | Method for reducing burrs at cold-hard curled edge |
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| DE19644131A1 (en) * | 1996-10-23 | 1998-04-30 | Siemens Ag | Method of optimising strip width control at the ends of a strip on a rolling line, |
| JP2005034875A (en) * | 2003-07-14 | 2005-02-10 | Jfe Steel Kk | Method for controlling width of rolling stock in hot rolling |
| CN203991666U (en) * | 2014-07-16 | 2014-12-10 | 首钢京唐钢铁联合有限责任公司 | A kind of strip-mill strip E2 edger roll |
| CN104209339A (en) * | 2013-05-30 | 2014-12-17 | 宝山钢铁股份有限公司 | Method of using rough rolling inverse-pass vertical roll gap measurement for conducting plate blank width control |
| CN104307911A (en) * | 2014-08-28 | 2015-01-28 | 首钢总公司 | Method for improving elongation rate of high-surface-grade IF steel (Interstitial-Free Steel) |
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| DE19644131A1 (en) * | 1996-10-23 | 1998-04-30 | Siemens Ag | Method of optimising strip width control at the ends of a strip on a rolling line, |
| JP2005034875A (en) * | 2003-07-14 | 2005-02-10 | Jfe Steel Kk | Method for controlling width of rolling stock in hot rolling |
| CN104209339A (en) * | 2013-05-30 | 2014-12-17 | 宝山钢铁股份有限公司 | Method of using rough rolling inverse-pass vertical roll gap measurement for conducting plate blank width control |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107812786A (en) * | 2017-09-15 | 2018-03-20 | 宁波钢铁有限公司 | A kind of hot rolling technology for being used to produce the electrical sheet without metal flow accumulation defect |
| CN108176717A (en) * | 2017-12-28 | 2018-06-19 | 常熟市龙腾特种钢有限公司 | A kind of hot rolled circular steel Methods of Surface Quality Control |
| CN108176717B (en) * | 2017-12-28 | 2019-07-02 | 常熟市龙腾特种钢有限公司 | A kind of hot rolled circular steel Methods of Surface Quality Control |
| CN109365527A (en) * | 2018-11-30 | 2019-02-22 | 湖南华菱湘潭钢铁有限公司 | A kind of milling method of big broadening ratio Wide and Heavy Plates |
| CN112916616A (en) * | 2019-09-30 | 2021-06-08 | 日照钢铁控股集团有限公司 | Process for rolling sheet billet checkered plate by common hot-rolled strip steel production line |
| CN112916616B (en) * | 2019-09-30 | 2022-11-11 | 日照钢铁控股集团有限公司 | Process for rolling sheet billet checkered plate by common hot-rolled strip steel production line |
| CN111530926A (en) * | 2020-04-27 | 2020-08-14 | 湖南华菱涟源钢铁有限公司 | Control method for peeling edge of strip steel in rough rolling and strip steel |
| CN114210729A (en) * | 2021-11-16 | 2022-03-22 | 首钢智新迁安电磁材料有限公司 | Method for reducing burrs at cold-hard curled edge |
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Application publication date: 20170829 |