CN105057351B - Ultrathin mill coil production line and its process matched therewith - Google Patents
Ultrathin mill coil production line and its process matched therewith Download PDFInfo
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- CN105057351B CN105057351B CN201510597199.5A CN201510597199A CN105057351B CN 105057351 B CN105057351 B CN 105057351B CN 201510597199 A CN201510597199 A CN 201510597199A CN 105057351 B CN105057351 B CN 105057351B
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Abstract
The invention discloses a kind of ultrathin mill coil production line and its process matched therewith, its the second roughing milling train is provided with stay-warm case to crossing on steel rider road for vertical miller group is rolled in first, and vertical miller group is rolled in rolling unit and second are offseted in being sequentially installed with first between rolling unit is offseted during vertical miller group and second are rolled in first；The 8th finish rolling flat roll mill group is installed between the 7th finish rolling flat roll mill group and collection volume bundling process.The present invention passes through the increase to 3/4 continous way Continuous mill train production line capital equipment and auxiliary equipment, transformation, and rolling line, blank, rolling temperature, rolling mill speed, with the adjustment in terms of roller system, optimization, to reach the purpose of the ultrathin mill coil of steady production.
Description
Technical field
The present invention relates to mill coil manufacturing technology, more particularly to ultrathin mill coil production line and its supporting work
Skill.
Background technology
At present, in mill coil market, supply exceed demand, in the case of competition, produces a kind of thickness and exists
Below 1.3mm mill coil, replaces dimension cold-strip steel, the economical substitute as its product, to expand heat
The market scope of ribbon steel is rolled, is had important practical significance.Mill coil is produced using 3/4 continous way Continuous mill train, it is right
For medium and small enterprise, there is the superiority of simplified equipment and independent production, the thickness of production is general in 1.5~5.0mm；It is right
In production thickness below 1.3mm ultrathin mill coil, due to Design of Production Line in terms of defect, roll it is unstable,
Production difficulty is big, and lumber recovery is low, and production cost is high.
The content of the invention
The technical problems to be solved by the invention are that original rolling line equipment is supplemented, and complete the transformation to production line,
By to rolling line, blank, rolling temperature, rolling mill speed, with the adjustment in terms of roller system, optimization, with reach steady production surpass
The purpose of slim mill coil.
To achieve the above object, this invention takes following technical scheme, ultrathin mill coil production line, blank is accurate
Standby, heating furnace, the first roughing milling train and the second roughing milling train are sequentially connected, and vertical miller group, second, are rolled in being followed by first
Offset rolling unit, finish rolling vertical miller group and the first to the 7th finish rolling flat roll mill group in three to be sequentially connected, its feature exists
In, offseted in being sequentially installed with first between rolling unit is offseted during vertical miller group and second are rolled in first rolling unit and
Vertical miller group is rolled in second；The 8th finish rolling plain-barreled roll is installed between the 7th finish rolling flat roll mill group and collection volume bundling process to roll
Unit.
In order to which middle blank reduces temperature drop, crossing on steel rider road for vertical miller group is rolled in the second roughing milling train to first and is pacified
Equipped with stay-warm case.
The stay-warm case is casing arc frame cover body structure, and cover body central filler has heat-insulation layer.
The heat-insulation layer is heat-preservation cotton or felt insulation.
A kind of process matched therewith of ultrathin mill coil production line, its step is as follows：
1) steel billet is heated, preheating section, bringing-up section, soaking zone heating temperature range are respectively：800~1000 DEG C,
1200~1290 DEG C, 1200~1310 DEG C；
2) 1140~1260 DEG C of blank start rolling temperature, add up deflection by the steel billet passage for crossing first, second roughing mill and set
The thickness for being set to blank in the middle of 50%~70%, outlet is 38~42mm；
3) blank crosses increased stay-warm case on steel rider road between vertical miller group is rolled in the second roughing mill and first in the middle of
Inside pass through；
4) in the middle of blank through roll in first offseted in vertical miller group, first rolled in rolling unit, second vertical miller group,
Rolling unit, finish rolling vertical miller group, the first to the 3rd finish rolling flat roll mill group and by the 4th to are offseted in second and third
The work roll diameter of six finish rolling flat roll mill groups is set to 280mm, and the 7th to the 8th finish rolling flat roll mill group work roll diameter is set
It is set to 250mm mill milling, finishing temperature >=855 DEG C；
5) cooling water pressure controls constant pressure by frequency modulation device, and each frame is imported and exported cooling water inflow and is controlled using gate valve,
Roll coolant system cooling water is injected directly on work roll, and is flowed away by work roll both sides；
6) the support roller roll neck deviation from cylindrical form of flat roll mill group is less than 0.008mm, deviation from circular from and is less than 0.003mm；
7) often the mill speed fine setting scope of set milling train unit is ± 2m/s, and highest mill speed is up to 10~15m/s.
It is an advantage of the invention that by the increase to 3/4 continous way Continuous mill train production line capital equipment and auxiliary equipment,
Transformation, and optimize on process system, reach the purpose for realizing stable rolling thickness in below 1.3mm mill coil.
1st, optimize roughing technique, reduce the middle sotck thinkness of Continuous mill train entrance.
2nd, in increasing, finishing mill line, in reduction, the machine utilization of mm finishing mill unit, made with reducing because draught pressure is excessive
Into the stressed member such as finisher frame, roll, roll bearing and housing screw elastic deformation and roll Fast Wearing
Caused by thickness fluctuation.
3rd, the diameter of four-high mill working roll is reduced, the purpose for reducing draught pressure, four-high mill working roll balance is realized
Device uses reliable and stable hydraulic balance device.
Rolling temperature when the 4th, leaving roughing mills by being improved blank in the middle of raising to heating furnace, roughing train,
And the rolling temperature of middle blank is ensured using effective middle blank stay-warm case.
5th, each frame is using individually importing and exporting cooling water inflow control system, with reinforcement, mm finishing mill unit cooling water inflow
In control ability, particularly low speed rolling, the control ability of mm finishing mill unit cooling water inflow；Roll coolant system uses practicality
Cooling water baffle device for water, realize that cooling water is injected directly on roll, without being splashed on the steel band of rolling, it is to avoid roll is cold
But water to inject directly on and roll temperature drop caused by rolled steel strip surface.
6th, using DC power-supply system.In, mm finishing mill unit use reversible control system.
7th, the support roller roll neck of four-high mill unit is refined, its bearing inner sleeve is realized that interference is matched somebody with somebody with its roll neck
Close, to eliminate the problem of producing gap after a certain period of use time between the two, meanwhile, thus caused strip when reducing rolling
Thickness fluctuation.
8th, the mill speed of mm finishing mill unit is improved, temperature drop is reduced.
Brief description of the drawings
Fig. 1 is the production technological process of the present invention.
Fig. 2 is the stay-warm case schematic diagram in the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, referring to Fig. 1 and Fig. 2, in figure, and each frame is represented
One production process or a set of production unit, solid box are expressed as the original unit of rolling line, and dotted line frame is expressed as rolling line and increases unit newly；
Arrow represents the direction of steel band operation；Z is intermediate mill classification, and J is mm finishing mill unit classification, and L is that the working roll of unit is edger roll
Form, P is that the working roll of unit is plain-barreled roll form, wherein numeral is the milling train of the identical work roll form of the identical unit classification of difference
Unit.Rolled in ZL- and rolling unit is offseted in vertical miller group, ZP-, JL- finish rolling vertical miller groups, JP- finish rolling flat roll mill groups.
Ultrathin mill coil production line, it is thick that blank prepares 101, heating furnace 102, the first roughing milling train 103 and second
Milling train 104 is sequentially connected, and vertical miller group ZL1 is rolled in being followed by first, offsets rolling unit ZP2, ZP3, essence in second and third
Roll vertical miller group JL and first to the 7th finish rolling flat roll mill group JP1~JP7 to be sequentially connected, it is characterised in that second is thick
Crossing on steel rider road for vertical miller group ZL1 is rolled in milling train 104 to the first stay-warm case 105 is installed, edger roll is rolled in first and is rolled
Offseting to offset in rolling unit ZP1 and second in be sequentially installed with first between rolling unit ZP2 in unit ZL1 and second and rolling vertical
Rolling unit ZL2；The 8th finish rolling plain-barreled roll is installed between the 7th finish rolling flat roll mill group JP7 and collection volume bundling process 106 to roll
Unit JP8.
In order to which middle blank reduces temperature drop, that vertical miller group ZL1 is rolled in the second roughing milling train 104 to the first crosses steel rider
Stay-warm case 105 is installed on road.
The stay-warm case 105 is made up of cover body 1051 and heat-insulation layer 1052, is casing arc frame cover body structure, cover body 1051
Central filler has heat-insulation layer.
The heat-insulation layer 1052 is heat-preservation cotton or felt insulation.
A kind of process matched therewith of ultrathin mill coil production line, its step is as follows：
1) steel billet is heated, preheating section, bringing-up section, soaking zone heating temperature range are respectively：800~1000 DEG C,
1200~1290 DEG C, 1200~1310 DEG C；
2) 1140~1260 DEG C of blank start rolling temperature, will cross the accumulative change of steel billet passage of first, second roughing mill 103,104
Shape amount is set as that the thickness in the middle of 50%~70%, outlet is 38~42mm；
3) blank crosses increased on steel rider road between vertical miller group ZL1 is rolled in the second roughing mill 104 and first in the middle of
Pass through in stay-warm case 105；
4) blank rolls edger roll through rolling to offset in vertical miller group ZL1, first in rolling unit ZP1, second in first in the middle of
Milling train group ZL2, offset rolling unit ZP2, ZP3, finish rolling vertical miller group JL, the first to the 3rd finish rolling plain-barreled roll in second and third
Milling train group JP1~JP3 and the 4th to the 6th finish rolling flat roll mill group JP4~JP6 work roll diameter is set to 280mm,
Seven to the 8th finish rolling flat roll mill group JP7~JP8 work roll diameters are set to 250mm mill milling, finishing temperature >=855
℃；
5) cooling water pressure controls constant pressure by frequency modulation device, and each frame is imported and exported cooling water inflow and is controlled using gate valve,
Roll coolant system cooling water is injected directly on work roll, and is flowed away by work roll both sides；
6) the support roller roll neck deviation from cylindrical form of flat roll mill group is less than 0.008mm, deviation from circular from and is less than 0.003mm；
7) often the mill speed fine setting scope of set milling train unit is ± 2m/s, and highest mill speed is up to 10~15m/s.
The present invention has following features：
1st, increase it is a set of in roll two-roller mill unit ZP1, it is a set of in roll vertical miller unit ZL2 and the rolling of a set of finish rolling four
Machine unit JP8 (referring to Fig. 1), according to newly added equipment, transforms original vertical miller unit ZL1 transmission case hold-down gear, transformation
Original finish rolling four-high mill unit JP5~JP7 hydraulic working roll bascules.It is effective by increasing unit and original Transformation of Unit
Ground reduce in, the machine utilization of finish rolling milling train unit, with reduce because draught pressure is excessive and caused by finisher frame, roll
Thickness fluctuation caused by the elastic deformation and roll Fast Wearing of the stressed members such as roller, roll bearing and housing screw.
2nd, roughing rolling mill practice is optimized.Under the precondition for meeting machine utilization, to first, second roughing milling train 103,
104 roughing rolling schedule is adjusted, the redesign of its to the effect that design of section of rolling mill major parameter, redistributes roughing
Deflection of the milling train unit rolling per a time steel billet, makes steel billet passage add up deformation amount controlling 50%~70%, makes blank
Deformation is more uniformly distributed, more rationally.By rolling, the thickness of middle blank is efficiently reduced, and stably control
38~42mm, in being its entrance, finish rolling Continuous mill train create good condition, also rolled for Continuous mill train and thin create premise bar
Part.
3rd, the optimization of heating steel billet system.26 meters of effective length in heating-furnace, are divided into three sections and steel billet are heated.Point
Wei not 8 meters of preheating section, 800~1000 DEG C of temperature range, heating steel billet；8 meters of bringing-up section, 1200~1290 DEG C of temperature range, makes
Steel billet temperature reaches the required temperature of rolling；12 meters of soaking zone, 1200~1310 DEG C of temperature range, makes steel billet temperature completely equal
It is even.It is that the rolling temperature of steel band ensures by the optimization to heating steel billet system, rolled products performance is qualified to provide premise bar
Part.
4th, original four-high mill working roll roller system is transformed, by first three frame finish rolling four-high mill unit of mm finishing mill unit
JP4~JP6 work roll diameter is reduced to 280mm, and last two frames finish rolling four-high mill unit JP7, JP8 working roll is straight
Footpath is reduced to 250mm.Its main purpose be steel band roll it is thin provide direct advantage, meanwhile, reduce steel band and bite and roll
The nip angle of roller, for roll it is thin after steel band can smoothly enter lower a time milling train unit and carry out rolling and create favorable conditions.
5th, increase stay-warm case 105 on 18 meters of steel rider road excessively before entrance Continuous mill train (referring to Fig. 2).Its material uses 40
The Q345B steel plates of mm of thickness are made, and four sections of stay-warm case point is covered, and four sections of stay-warm case progress are controlled respectively by four oil cylinders
Opening and closing.The overall structure of every section of stay-warm case is identical, is casing arc frame cover body structure design, and central hollow is filled with insulation
Cotton or felt insulation, four sections of stay-warm case opening and closings are controlled by four oil cylinders respectively, and opening and closing mode turns down for side；The main work of stay-warm case
With being to reduce middle blank to contact with the direct of cold air in the operation of rolling, to reduce the cooling velocity of middle blank, reach
Improve rolling temperature during tandem rolling, it is ensured that the purpose of product mechanical performance.
6th, cooling water pressure controls constant pressure by frequency modulation device, and each frame is imported and exported cooling water inflow and is controlled using gate valve,
With in reinforcement, the control ability of finish rolling Continuous mill train cooling water inflow, particularly in low speed rolling, the cooling of finish rolling Continuous mill train
The control ability of water, reaches the purpose reduced with thickness, width difference before and after bar steel band；Roll coolant system, which is used, to be compared
Bakelite material plank that is strong but not injuring roll surface is abutted against on the work roll of rotation, realizes that cooling water can directly spray
Penetrate on work roll, most of cooling water is flowed away by work roll both sides, without flowing directly on the steel band of high-speed rolling, keep away
Having exempted from roll cooling water, directly stream is in high-speed rolling steel strip surface, caused rolling temperature drop.
7th, increase a set of grinding machine to refine the support roller roll neck of four-high mill unit, the grinding accuracy of grinding machine reaches ratio
Higher level, i.e. deviation from cylindrical form are less than 0.008mm, deviation from circular from and are less than 0.003mm.The main work of support roller roll neck grinding
With being to realize its roller seat bearing inner sleeve and its roll neck to be interference fitted, between eliminating and produce after a certain period of use time between the two
The problem of gap, and thus caused belt steel thickness fluctuation when reducing rolling.
8th, Continuous mill train uses full DC power-supply system, and can realize makes every set after the reversible rolling of Continuous mill train, linkage
The mill speed of milling train unit can be finely adjusted in ± 2m/s, to reach optimum efficiency, and highest mill speed can be achieved and reaches
10~15m/s.
Embodiment 1：This embodiment is that rolling grade of steel is that Q235, specification are 132 × 1.3mm mill coils.
The rolling temperature of strict control steel band in the operation of rolling, the heating-up temperature (soaking zone) of steel band, start rolling temperature and
Finishing temperature control respectively 1200~1310 DEG C, 1140~1260 DEG C, >=855 DEG C.The present embodiment：1290 DEG C of heating-up temperature,
Optimal Control is at 1250~1300 DEG C；1250 DEG C of start rolling temperature, Optimal Control is at 1240~1260 DEG C；865 DEG C of finishing temperature, most
Good >=870 DEG C of control.
The rolling pattern of strict steel band in the operation of rolling.It is specific as follows：
1. roughing：Single chassis is rolled, and wherein the milling train units of Φ 600 roll 5 passages, and mill speed 2.7mm/s, Φ 500 rolls
Machine unit rolls 3 passages, mill speed 2.6mm/s.Every time rolling procedure is the change for rolling blank area of section, by growing
× it is wide be indicated, the length of blank can constantly stretch according to the degree of deformation elongated.The thickness of blank is (equivalent to pass
Highly, similarly hereinafter), width (equivalent to the width of pass, similarly hereinafter) it is specific every time change it is as shown in the table：
2. in, finish rolling：Continual rolling totally 14 passage, respectively 1 vertical (edge rolling), 1 flat (flat rolling), 1 vertical (edger roll rolls
System), 2 flat (flat rollings), 1 vertical (edge rolling), 8 flat (flat rollings)；Wherein edge rolling controls width, flat rolling control
Thickness processed, mill speed is matched with rolling thickness control, as shown in the table：
| Milling train | ZL1 | ZP1 | ZL2 | ZP2 | ZP3 | JL | JP1 | JP2 | JP3 | JP4 | JP5 | JP6 | JP7 | JP8 |
| Thickness mm | 129 | 30 | 129 | 23 | 16 | 129 | 11 | 7.8 | 5.5 | 3.6 | 2.7 | 2.0 | 1.6 | 1.3 |
| Width mm | 42 | 133 | 31 | 131 | 133 | 17 | 130 | 130 | 131 | 131 | 131 | 132 | 132 | 132 |
| Speed m/s | 0.3 | 0.4 | 0.4 | 0.5 | 0.7 | 0.7 | 1.1 | 1.5 | 2.1 | 3.3 | 4.3 | 5.9 | 7.3 | 9.0 |
Embodiment 2：
This embodiment is that rolling grade of steel is that Q195, specification are 163 × 1.2mm mill coils.
The present embodiment：1280 DEG C of heating-up temperature, Optimal Control is at 1240~1290 DEG C；1240 DEG C of start rolling temperature, optimal control
System is at 1230~1260 DEG C；878 DEG C of finishing temperature, Optimal Control >=860 DEG C.
1. roughing：Single chassis is rolled, and wherein the milling train units of Φ 600 roll 3 passages, and mill speed 2.7mm/s, Φ 500 rolls
Machine unit rolls 3 passages, mill speed 2.6mm/s.Every time rolling procedure is the change for rolling blank area of section, by growing
× it is wide be indicated, the length of blank can constantly stretch according to the degree of deformation elongated.Specific every time change such as following table
It is shown：
2. in, finish rolling：Continual rolling totally 14 passage, respectively 1 vertical (edge rolling), 1 flat (flat rolling), 1 vertical (edger roll rolls
System), 2 flat (flat rollings), 1 vertical (edge rolling), 8 flat (flat rollings)；Wherein edge rolling controls width, flat rolling control
Thickness processed, each passes speed is matched with rolling thickness control, as shown in the table.
| Milling train | ZL1 | ZP1 | ZL2 | ZP2 | ZP3 | JL | JP1 | JP2 | JP3 | JP4 | JP5 | JP6 | JP7 | JP8 |
| Thickness mm | 160 | 30 | 160 | 23 | 16 | 160 | 11 | 7.8 | 5.5 | 3.6 | 2.7 | 2.0 | 1.5 | 1.2 |
| Width mm | 42 | 164 | 31 | 162 | 164 | 17 | 161 | 161 | 162 | 162 | 162 | 163 | 163 | 163 |
| Speed m/s | 0.3 | 0.4 | 0.4 | 0.5 | 0.7 | 0.7 | 1.1 | 1.5 | 2.1 | 3.3 | 4.3 | 5.9 | 7.3 | 9.0 |
Technological process explanation：
The present invention is that cross section is rolled into thickness for square or rectangle long base by such a manufacture method and technique to exist
Below 1.3mm, width range is in 90~250mm ribbon steel, and its technological process is described as follows：
Blank preparatory process, by providing blank for base factory, according to physical dimension and gold of the concerned countries standard to blank
Phase constitution is detected.Enter next process after detection is qualified.
Heating process, capital equipment is heating furnace.In the qualified square billet push-in heating furnace of detection, according to heating technological requirement
It is heated, is heated to after the rolling temperature of technological requirement enter next process.
Roughing operation, capital equipment is the roughing milling train units of Φ 600, the roughing milling train units of Φ 500.Square billet successively enters two
Cover milling train unit and carry out single chassis rolling, be square or rectangle long base by cross-sectional area, be rolled into according to rolling mill practice requirement
Thickness range is in 38~42mm, and width is the middle blank that finished product requires width, rolls after qualified middle blank into next
Procedure.
In, finishing rolling step, capital equipment is stay-warm case, Z series rolling mill units, J series rolling mill units.Middle blank insulation
Under state, sequentially enter each milling train unit and carry out linkage rolling, it is qualified to be rolled into middle blank according to rolling mill practice requirement
Finished strip.In order to coordinate rolling rhythm, the middle blank after roughing is incubated before tandem rolling is entered to middle blank, is incubated
It has been described before the cover function present invention；In the operation of rolling, the width of L series rolling mill unit allocation steel bands, P series rolling mill units
The thickness of steel band is controlled, controls often to cover the mill speed of milling train unit by PLC program, the mesh of stable rolling steel band is reached with this
, in order to which further up to the ultrathin mill coils of qualified below the 1.3mm of stable rolling, the present invention is newly-increased to original production line
Equipment and the equipment that reuses are transformed, and its content of the invention is above being described；Roll after qualified finished product into next
Procedure.
Collection volume bundling process, capital equipment is type reeling complexes and bundling complexes.Qualified strip is entered
Row coils into band coil of strip and bundling, putting and protecting in favor of strip.Enter next process after bundling.
Weighman is put in storage process, will enter warehouse for finished product after the steel coil strip weighman for accomplishing fluently bundle.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of the technology of the present invention principle is not departed from, some improvement and modification can also be made for different steel grades, this
A little improve also should be regarded as protection scope of the present invention with modification.
Claims (1)
1. a kind of process matched therewith of ultrathin mill coil production line, its step is as follows：
1）Steel billet is heated, preheating section, bringing-up section, soaking zone heating temperature range are respectively：800~1000 DEG C, 1200
~1290 DEG C, 1200~1310 DEG C；
2）1140~1260 DEG C of blank start rolling temperature, adds up deflection by the steel billet passage for crossing first, second roughing mill and is set as
50%~70%, the thickness of the middle blank in outlet is 38~42mm；
3）Middle blank crosses logical in increased stay-warm case on steel rider road between vertical miller group is rolled in the second roughing mill and first
Cross；
4）Middle blank rolls vertical miller group, second through rolling to offset in vertical miller group, first in first in rolling unit, second
And rolling unit, finish rolling vertical miller group, the rolling of the first to the 8th finish rolling flat roll mill group are offseted in the 3rd, wherein, by the 4th
Work roll diameter to the 6th finish rolling flat roll mill group is set to 280mm, and the 7th to the 8th finish rolling flat roll mill group working roll is straight
Footpath is set to 250mm, finishing temperature >=855 DEG C；
5）Cooling water pressure controls constant pressure by frequency modulation device, and each frame is imported and exported cooling water inflow and is controlled using gate valve, roll
Cooling system cooling water is injected directly on work roll, and is flowed away by work roll both sides；
6）The support roller roll neck deviation from cylindrical form of flat roll mill group is less than 0.008mm, deviation from circular from and is less than 0.003mm；
7）Often the mill speed fine setting scope of set milling train unit is ± 2m/s, and highest mill speed is up to 10~15m/s.
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| CN201510597199.5A CN105057351B (en) | 2015-09-17 | 2015-09-17 | Ultrathin mill coil production line and its process matched therewith |
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| CN107088585A (en) * | 2017-06-09 | 2017-08-25 | 首钢京唐钢铁联合有限责任公司 | Rolling method of strip steel |
| CN111318567A (en) * | 2020-03-30 | 2020-06-23 | 天津天钢联合特钢有限公司 | Production method of hot-rolled narrow strip steel for cold rolling |
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| JPH10146601A (en) * | 1996-11-15 | 1998-06-02 | Nippon Steel Corp | Manufacture of hot rolled steel sheet with thin scale using continuous hot rolling process |
| JP2005262255A (en) * | 2004-03-17 | 2005-09-29 | Kawasaki Heavy Ind Ltd | Equipment for manufacturing hot-rolled steel strip, method for constituting the same equipment and method for manufacturing hot-rolled steel strip |
| CN2803549Y (en) * | 2005-04-05 | 2006-08-09 | 鞍山市润辉冶金设备制造有限公司 | Thermal insulation cover on transferring roller way of continuous casting and rolling set for hot rolled strips |
| CN101011704A (en) * | 2006-08-24 | 2007-08-08 | 青岛培明金属有限公司 | New technique for producing hot rolling stainless steel strip |
| CN201324735Y (en) * | 2008-12-29 | 2009-10-14 | 中国第一重型机械股份公司 | Collocation method of vertical mill in hot strip mill set |
| JP5626792B2 (en) * | 2011-01-04 | 2014-11-19 | 株式会社神戸製鋼所 | Rolling method of high strength steel sheet |
| CN203343179U (en) * | 2013-06-28 | 2013-12-18 | 新余钢铁集团有限公司 | Steel passing roller way heat preserving device of continuous rolling unit |
| CN204953528U (en) * | 2015-09-17 | 2016-01-13 | 江西洪都钢厂有限公司 | Ultra -thin type mill coil production line |
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Address after: 330013 Nanchang economic and Technological Development Zone, Nanchang, Jiangxi, 1518 Patentee after: JIANGXI HONGDU STEELWORKS CO., LTD. Address before: 330013 Nanchang economic and Technological Development Zone, Nanchang, Jiangxi, No. 1188, Shui Hu Road Patentee before: JIANGXI HONGDU STEELWORKS CO., LTD. |
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