CN109465295A - Method for preventing edge cracking and strip breakage of hot continuous rolled steel plate in cold rolling - Google Patents
Method for preventing edge cracking and strip breakage of hot continuous rolled steel plate in cold rolling Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title abstract description 47
- 239000010959 steel Substances 0.000 title abstract description 47
- 238000005097 cold rolling Methods 0.000 title abstract description 37
- 238000000034 method Methods 0.000 title abstract description 30
- 238000005336 cracking Methods 0.000 title description 4
- 238000005098 hot rolling Methods 0.000 abstract description 26
- 238000005096 rolling process Methods 0.000 abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 18
- 230000009467 reduction Effects 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 239000000498 cooling water Substances 0.000 abstract description 7
- 239000007921 spray Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 5
- 238000004513 sizing Methods 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 229910000734 martensite Inorganic materials 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000003801 milling Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000007688 edging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B21B1/24—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 in a continuous or semi-continuous process
- B21B1/26—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 in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- 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
- B21B1/24—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 in a continuous or semi-continuous process
- B21B1/28—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 in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- 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
-
- 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
- B21B37/58—Roll-force control; Roll-gap control
-
- 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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Metal Rolling (AREA)
Abstract
本发明公开了一种防止热连轧钢板在冷轧中边裂断带的方法，包括如下步骤：钢水冶炼后获得板坯，将所述板坯进行加热，采用热轧定宽机对所述板坯定宽，再将板坯经过粗轧得到中间坯，将中间坯精轧，得到钢板；将精轧后的所述钢板层流冷却后进行卷取，得到热轧卷，对所述热轧卷开卷进行冷轧，所述冷轧压下率总压下率≤50％；将所述热轧定宽机的锤头孔型角度调整至40‑42°；将所述中间坯的厚度调整至50‑60mm；开启精轧段F1/F2机架间除鳞水，水压8‑12MPa；关闭精轧段测喷水；开启精轧段F3/F4机架间冷却水。所述层流冷却区域前段采用中压超快冷工艺，后段采用空冷。本发明可以在不影响生产情况及成品性能的条件下较容易的解决因DP980冷轧边裂导致断带缺陷，提高带钢的成材率。
The invention discloses a method for preventing a hot continuous rolled steel plate from breaking at the edge during cold rolling, comprising the steps of: obtaining a slab after molten steel smelting, heating the slab, and using a hot rolling sizing machine to compress the slab. The width of the slab is fixed, and then the slab is subjected to rough rolling to obtain an intermediate billet, and the intermediate billet is finish-rolled to obtain a steel plate; the steel plate after finishing rolling is laminarly cooled and then coiled to obtain a hot-rolled coil. The rolled coil is uncoiled for cold rolling, and the total reduction ratio of the cold rolling reduction ratio is less than or equal to 50%; the hammer pass angle of the hot rolling sizing machine is adjusted to 40-42°; the thickness of the intermediate billet is adjusted Adjust it to 50-60mm; turn on the descaling water between the stands of F1/F2 in the finishing section, and the water pressure is 8-12MPa; close the water spray in the finishing section; turn on the cooling water between the stands of F3/F4 in the finishing section. The front section of the laminar cooling zone adopts a medium-pressure ultra-fast cooling process, and the rear section adopts air cooling. The invention can easily solve the belt breakage defect caused by DP980 cold rolling edge crack without affecting the production situation and the performance of the finished product, and improve the yield of the strip steel.
Description
Technical field
The invention belongs to technical field of steel rolling more particularly to a kind of sides for preventing hot continuous-milling steel plate brisement band in side in cold rolling
Method.
Background technique
Automobile loss of weight, energy conservation, high security requirements at the higher level make advanced high-strength steel on automobile application increase year by year,
Intensity is that 780MPa grades and following rank have been widely used covering, structural member and reinforcer of automobile etc..With automobile system
Make the progress of technology, the cold-rolled biphase steel of 980MPa grades and the above rank is also gradually applied, the production of Shoudu Iron and Steel Co cold rolling mill
During 980Mpa grade high-strength steel, cold rolling process is repeatedly broken into split because of side caused by break band accident, break band influence cold rolling produce
The production stability and rhythm of line, it would be highly desirable to solve.
Domestic batch stablizes the enterprise of the industrial production high intensity levels and few, mainstream steel mill tandem mills life at present
Side is split defect and is existed substantially when producing the steel grade, uses intermediate process trimming while splitting pattern and seeing after Fig. 1, one side side split generation, cuts
While cutting loss seriously, lumber recovery is reduced；Another aspect part steel mill is although subsequent cold in hot rolling mill addition Edge Heating device
Edging splits mitigation, but it is too high to consume energy, and causes energy waste, therefore there is an urgent need to from technical matters angle from hot rolling and cold rolling side
Defect is split on face synergistic operation, the side for solving to generate in cold-rolled process.
Summary of the invention
In order to solve drawbacks described above, the main purpose of the present invention is to provide one kind to prevent hot continuous-milling steel plate side in cold rolling
Defect is split on the method for brisement band, the cold rolling side that can inexpensive, simply and efficiently solve the DP980 steel grade of elimination hot continuous rolling production.
In order to achieve the above object, the present invention adopts the following technical scheme: one kind prevents hot continuous-milling steel plate side in cold rolling
The method of brisement band, includes the following steps:
Slab is obtained after smelting molten steel, and the slab is heated, using hot rolling constant width machine to the slab sizing, then
Slab is obtained into intermediate base by roughing, by the intermediate base finish rolling, obtains steel plate；By the steel plate section cooling after finish rolling
After batched, obtain hot rolled coil, to the hot rolled coil uncoiling carry out cold rolling, cold rolling reduction ratio total reduction≤50%；
Wherein, the tup pass angle of the hot rolling constant width machine is adjusted to 40-42 °；By the thickness tune of the intermediate base
It is whole to 50-60mm；
De-scaling water between unlatching finish rolling section F1/F2 rack, hydraulic pressure 8-12MPa；It closes finish rolling section and surveys water spray；Open finish rolling section
F3/F4 interstand cooling water.
Section cooling region leading portion presses ultrafast cold technique in using, and back segment is using air-cooled.
As a further preference, the steel plate is DP980Mpa high-strength steel.
As a further preference, de-scaling water between unlatching finish rolling section F1/F2 rack, hydraulic pressure 10MPa；Open finish rolling section F3/
F4 interstand cooling water, water 30-40%.Water is on the basis of each rack per hour water, such as 360m3/ h, it is each
Steel mill slightly has difference.
As a further preference, the ultrafast cold technique of medium pressure specifically includes: upper and lower pole pipe while opening, pressure is
0.3-0.5MPa。
As a further preference, the pressure is 0.4MPa
As a further preference, the coiling temperature is 550-650 DEG C.
As a further preference, the coiling temperature is 600 ± 20 DEG C.
As a further preference, after the section cooling, steel plate edge temperature drop is ± 20 DEG C.
As a further preference, when the cold rolling, template IU value≤20I.
The beneficial effects of the present invention are: thickness of the present invention by tup optimization for hole and intermediate base to hot rolling constant width machine
It is adjusted, reduces the temperature drop of intermediate base edge；Simultaneously between de-scaling water, interstand cooling water and side spray water finish rolling section rack into
Row optimizes, and presses cold section of ultrafast cold technique, the air-cooled relieved layer of back segment hot rolled plate edge temperature drop in the use of section cooling region leading portion.It is logical
The above key point control is crossed, optimizes hot rolling edge Martensite and volume fraction, while improving cold rolling technique, solves
Because hot rolling edging tissue feature and template are bad, excessive equal caused cold rolling side is deformed under cold rolling and splits problem, this method is simple,
Economical and efficient can easier be solved under conditions of not influencing the condition of production and end properties because of DP980 using the present invention
Cold rolling side, which is split, leads to disconnected band defect, improves the lumber recovery of strip.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.
Fig. 1 is the cold rolling side raw edges pattern schematic diagram of existing DP980 steel grade.
Fig. 2 a is the hot rolling metallographic structure schematic diagram of existing DP980 steel grade (at edge 5mm).
Fig. 2 b is the hot rolling metallographic structure schematic diagram of existing DP980 steel grade (at edge 20mm).
Fig. 3 a is the hot rolling SEM pattern schematic diagram of existing DP980 steel grade (at edge 5mm, band-like).Fig. 3 b is existing
The hot rolling SEM pattern schematic diagram of DP980 steel grade (at edge 20mm).
Fig. 4 is the hot rolled ferrite and martensite Interfacial Dislocations plug product pattern schematic diagram of existing DP980 steel grade.
Fig. 5 is that microscopic appearance schematic diagram is split on the cold rolling side of existing DP980 steel grade.
Fig. 6 a is the wide Temperature Distribution schematic diagram of plate (intermediate base and layer cold junction Shu Wendu) of existing DP980 steel grade.
Fig. 6 b is the wide Temperature Distribution schematic diagram of plate (intermediate base and the layer cold junction Shu Wen of DP980 of embodiment of the present invention steel grade
Degree).
Fig. 7 a is the hot rolling SEM pattern schematic diagram of DP980 of embodiment of the present invention steel grade (at edge 5mm, without band-like).
Fig. 7 b is the hot rolling SEM pattern schematic diagram of DP980 of embodiment of the present invention steel grade (at edge 20mm).Fig. 8 is this
The plate form control figure of inventive embodiments DP980 steel grade.
Specific embodiment
The present invention is further described in detail With reference to embodiment, and the embodiment provided is only for explaining
The present invention is stated, the range being not intended to be limiting of the invention.
The application splits Forming Mechanism using microcosmic means analysis side first, specific as follows:
It is good that coil of strip macroscopic observation its hot rolling flanging part that side is split occurs, cold rolling caused by eliminating because of the damage of hot rolling edge
While splitting, therefore analyzed in terms of interior tissue, corroded using Lepera reagent, observation near part 5mm (splits depth in cold rolling side
≤ 5mm) and tissue apart from edge 20mm.The steel grade is ferrite+martensite and a small amount of bainite, and martensite becomes band group
It knits, edge 5mm banded structure is more serious, and martensite content is some higher (brilliant white is martensite), as shown in Figure 2 a, away from
It is unobvious from edge 20mm banded structure, as shown in Figure 2 b.It, can be clearer further under high power scanning electron microscope
See edge 5mm martensite elongate trend, as shown in Figure 3a, this is because from slab from heating furnace come out after, edge
Temperature drop has begun, and finish rolling region is arrived in accumulation, and in finish rolling end rack, edge temperature drop has been reduced to the critical zone of austenite transformation
Domain will form pro-eutectoid ferrite, and after the completion of finish to gauge, the pro-eutectoid ferrite intra-die of elongation has a large amount of distortion energy,
Further show that continuous coo1ing is difficult to happen perlitic transformation, shellfish to alloying elements, the CCT curves of steel grade such as crystal boundary row C, Mn
The transformation of family name's body is also seldom, and martensitic structure is finally formed around pro-eutectoid ferrite, brilliant since the cold process portion temperature drop of layer is bigger
Boundary's alloying element is more, and harden ability is good, forms martensite content height and banded structure becomes apparent from.The big reduction ratio of final cold rolling is (excellent
Reduction ratio 60% before changing) under, martensitic deformation cracking, while dislocation is also easily opened in ferrite and martensite the top plug product of elongation
It splits, the microscopic appearance of dislocation pile up is as shown in figure 4, cold rolling rear plug product can be in alternate cracking more than strength degree.Martensite fracture
Pattern and phase interface cracking are as shown in Figure 5.
Next, correspondence is split on the wide structural homogenity of the application research hot rolled plate and side, specifically include:
Using thermal imaging system to the wide temperature distributing measuring of course of hot rolling plate, choose intermediate base and layer it is cold after location point carry out
Measurement, intermediate base and layer is cold can significantly see edge temperature drop, intermediate base edge temperature drop is between 50-60 DEG C, such as Fig. 6 a
Shown in middle curve a, hot rolling flanging part temperature is bigger than middle part temperature drop after layer is cold, as shown in curve b in Fig. 6 a, two sides edge temperature
Respectively 480 DEG C and 510 DEG C, middle portion temperature is 610 DEG C or so, and edge temperature drop is 100-130 DEG C.
The thickness of process study discovery, tup optimization for hole and intermediate base to hot rolling constant width machine is adjusted, and can be dropped
The temperature drop of low intermediate base edge.Specifically include: tup pass angle is adjusted to 40 ° -42 °, and workpiece thickness increases to 50-
60mm.De-scaling water, interstand cooling water and side spray water finish rolling section finish rolling section rack are optimized simultaneously.It specifically includes: just
De-scaling water between normally open F1/F2 rack, hydraulic pressure 8-12MPa；It closes and surveys water spray, open F3/F4 interstand cooling water.The cold leading portion of layer
Press ultrafast cold technique, back segment air-cooled in, cold section of hot rolled plate edge temperature drop of relieved layer.
Specifically, ultrafast cold technique specifically includes: upper and lower pole pipe while opening, pressure is 0.3-0.5MPa, can be effective
Reduce hot rolling temperature drop.The control of edge temperature drop is within ± 20 DEG C after finally making layer cold junction beam, coiling temperature range 550-650
℃.As shown in curve c, d after being improved in Fig. 6 b.The tissue of edge and near part reaches unanimity after improvement, and the size of martensite becomes
Must be more tiny, uniformly.As shown in Fig. 7 a-7b.
Further, the application has studied the influence that cold-rolling process opposite side is split, and specifically includes:
It is found in actual production, cold rolling reduction ratio is bigger, and finished product thickness is thinner, and breach is more.Therefore come in reduction hot rolling
Expect thickness, rolled by cold rolling slack list and reduce the bad caused rolling fluctuation of template, template IU value controls within 20I, such as
Shown in Fig. 8.Reduction ratio drops to 50% and splits hereinafter, side can be effectively controlled simultaneously, and pattern is as shown in Fig. 7 a-7b after improvement.
Thus, the embodiment of the invention provides a kind of to prevent DP980 by the adjustment of technique in hot rolling and cold-rolled process
The method of the disconnected band of cold rolling raw edges.Do not increasing energy loss, but can guarantee production smoothly stablize carry out under the premise of, to hot rolling side
Portion's tissue optimizes, at the same to cold rolling article optimize, for cold-strip steel actual production technique improvement provide with reference to
Use for reference this method.This method is simple, significant effect.
Explanation presented below to the embodiment of the present invention.
DP980 steel grade main component is as shown in table 1；
Table 1DP980 main component (mass fraction %)
The method that the embodiment of the present invention prevents hot continuous rolling DP980 steel plate brisement band in side in cold rolling, includes the following steps:
Slab is obtained after smelting molten steel, and the slab is heated, using hot rolling constant width machine to the slab sizing, then
Slab is obtained into intermediate base by roughing, by the intermediate base finish rolling, obtains steel plate；By the steel plate section cooling after finish rolling
After batched, obtain hot rolled coil, to the hot rolled coil uncoiling carry out cold rolling, cold rolling reduction ratio total reduction≤50%；
Wherein, the tup pass angle of the hot rolling constant width machine is adjusted to 40-42 °；By the thickness tune of the intermediate base
It is whole to 50-60mm；
De-scaling water between unlatching finish rolling section F1/F2 rack, hydraulic pressure 8-12MPa；It closes finish rolling section and surveys water spray；Open finish rolling section
F3/F4 interstand cooling water, water 30-40%.
Section cooling region leading portion presses ultrafast cold technique in using, and back segment is using air-cooled.The ultrafast cold work of medium pressure
Skill specifically includes: upper and lower pole pipe while opening, pressure is 0.3-0.5MPa.
After above-described embodiment section cooling, steel plate edge temperature drop is ± 20 DEG C.When above-mentioned cold rolling, pass through cold rolling slack list
Rolling reduces the bad caused rolling fluctuation of template, template IU value≤20I.
Table 2 illustrates specific control technological parameter in each embodiment method and situation is split on side.
Table 2
Although the preferred embodiment of the application has been described, but one of ordinary skilled in the art once knows substantially
Creative concept, then additional changes and modifications may be made to these embodiments.It is wrapped so the following claims are intended to be interpreted as
It includes preferred embodiment and falls into all change and modification of the application range.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
Claims (9)
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449465A (en) * | 2019-07-04 | 2019-11-15 | 邯郸钢铁集团有限责任公司 | A method of reducing high-hardenability cold rolling high-strength steel cold rolling side brisement band |
| CN110883090A (en) * | 2019-10-31 | 2020-03-17 | 邯郸钢铁集团有限责任公司 | Method for overcoming acid rolling edge crack defect of cold-rolled high-strength steel above 780MPa level |
| CN111633026A (en) * | 2020-05-21 | 2020-09-08 | 武汉钢铁有限公司 | Control method for reducing linear defects at edge of hot-rolled medium-high carbon alloy steel |
| CN112077152A (en) * | 2020-08-28 | 2020-12-15 | 武汉钢铁有限公司 | Shape control method of high-strength steel for commercial vehicle longitudinal beam |
| CN112108527A (en) * | 2020-08-28 | 2020-12-22 | 武汉钢铁有限公司 | Method for controlling plate shape of steel for hot-rolled high-strength stirring tank body |
| CN112108523A (en) * | 2020-08-12 | 2020-12-22 | 北京首钢自动化信息技术有限公司 | Method and system for processing surface defects of strip steel in cold continuous rolling production |
| CN112760470A (en) * | 2021-01-14 | 2021-05-07 | 首钢京唐钢铁联合有限责任公司 | Method for eliminating cold rolling edge crack of strip steel |
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| CN114653750A (en) * | 2022-02-25 | 2022-06-24 | 鞍钢股份有限公司 | Hot rolling process for reducing edge crack of cold-rolled dual-phase steel above 1200MPa |
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| CN110883090A (en) * | 2019-10-31 | 2020-03-17 | 邯郸钢铁集团有限责任公司 | Method for overcoming acid rolling edge crack defect of cold-rolled high-strength steel above 780MPa level |
| CN111633026A (en) * | 2020-05-21 | 2020-09-08 | 武汉钢铁有限公司 | Control method for reducing linear defects at edge of hot-rolled medium-high carbon alloy steel |
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| CN112108527B (en) * | 2020-08-28 | 2022-08-09 | 武汉钢铁有限公司 | Method for controlling plate shape of steel for hot-rolled high-strength stirring tank body |
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| CN113059003A (en) * | 2021-03-01 | 2021-07-02 | 首钢京唐钢铁联合有限责任公司 | Method for controlling acid edge crack of cold-rolled high-strength steel |
| CN113649422A (en) * | 2021-06-30 | 2021-11-16 | 云南昆钢电子信息科技有限公司 | Hot image-based rough rolling billet quality detection system and method |
| CN114653750A (en) * | 2022-02-25 | 2022-06-24 | 鞍钢股份有限公司 | Hot rolling process for reducing edge crack of cold-rolled dual-phase steel above 1200MPa |
| CN114653750B (en) * | 2022-02-25 | 2024-03-19 | 鞍钢股份有限公司 | Hot rolling process for reducing edge crack of cold-rolled dual-phase steel above 1200MPa level |
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