CN108526221A - A kind of mild steel continuous casting and rolling production line and its production technology - Google Patents
A kind of mild steel continuous casting and rolling production line and its production technology Download PDFInfo
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- CN108526221A CN108526221A CN201810660032.2A CN201810660032A CN108526221A CN 108526221 A CN108526221 A CN 108526221A CN 201810660032 A CN201810660032 A CN 201810660032A CN 108526221 A CN108526221 A CN 108526221A
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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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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Abstract
The invention discloses a kind of mild steel continuous casting and rolling production line and its production technologies, it applies in steel rolling technical field, production line includes passing sequentially through the slab caster, the thick descaling device of high pressure water, roughing mills, pendulum of roller-way connection to cut, release and sheet piling device, rotary drum flying shear, waste material removal device, induction heater, high pressure crystal descaling device, intermediate rolling machine frame, intermediate water cooling plant, mm finishing mill unit, cooling facility for laminar flow, high-speed flying shear and coiling machine；Mm finishing mill unit is 10m~20m away from L including four finishing stands, intermediate rolling machine frame and first finishing stand centreline space.The present invention ensure that the open rolling of ferrite rolling low temperature and the requirement of high temperature coiling with rational producing line arrangement and suitable production technology；Ensure enough finish rolling total reductions；Strip is set to complete austenite before entering finish rolling to ferritic complete transformation, finish rolling is carried out in ferrite area, to realize the continuous casting and rolling production line ferrite rolling of real meaning.
Description
Technical field
The invention belongs to steel rolling technical fields, and in particular to a kind of mild steel continuous casting and rolling production line and its production work
Skill.
Background technology
Western mark company of Germany successfully carries out thin-slab caster experiment within 1986, and Niu Ke steel company of the U.S. exists within 1989
The Ke Laofuziweier of Indiana has built up first workshop CSP in the world, indicates that thin plate blank continuously casting and continuously rolling technology is thrown
Industrial production is entered.Hereafter, each steel/engineering company of the world, which does not turn off, sends out new thin plate blank continuously casting and continuously rolling technology, such as Germany
The ISP technologies of moral mark company, the CONROLL technologies of Austrian Voestalpine company, the QSP technologies of SUMITOMO CHEMICAL company, meaning are big
The ASP technologies of the FTSR technologies of sharp Danieli Off Mecc, the ESP technologies of Italian AVM hereinafter enlightening company and Chinese Anshan iron and steel plant.Wherein CSP
Technology application is the most universal, accounts for about the market share in 50% or more the whole world.And ESP is then newest strip endless casting rolling work
Skill.
Thin plate blank continuously casting and continuously rolling technology is compact, efficient, energy saving with its flow and contour attached with production Thin Specs, high intensity
Advantage on value-added product, not only for building, energy-saving and environment-friendly type society is highly beneficial, as the following Ferrous Metallurgy technology
Development trend, advantage more outstanding is that short route continuously casting and continuously rolling technology can produce tradition compared with traditional hot continuous rolling
Hot continuous rolling is difficult to the thin gauge strip produced.
Thin slab continuous casting and rolling is to obtain the main means of production of Thin Specs and ultra-thin size hot-rolled plate, and China has in the world
Most complete complete sheet billet continuous casting and rolling production line, when ought to become the leader of technology development, but go into operation with producing line
Between it is increasingly longer, some apparatus for production line failures obviously increase；By the market impact of traditional hot tandem and new technology, product
Benefit is declined；And the product function of original production line design is not perfect, enterprise needs to face the demand of technological transformation upgrading,
And the main contents being transformed, should be around improving product quality, promoting product specification and reducing production cost, improve environmental-protecting performance
It is main.
Ferrite rolling technology, that is, phase transformation controlled rolling has been developed in recent years a kind of new rolling mill practice, gradually
It is used to produce ultra-thin format hot rolled steel plate to substitute traditional cold rolling+annealing process.This new technology possesses plurality of advantages, example
If its rolling temperature is low, be conducive to energy saving；Surface quality is good, be conducive to product with hot Dai Leng；If producing cold rolling base
Plate, also helping cold rolling reduces cost etc..The a plurality of production line in China has the basic condition of ferrite rolling, but basic without real
The now function.
By ferrite rolling Technology application in continuous casting and rolling production line, have the characteristics that：Producing line structure characteristics of compact layout, work
Skill short flow, small investment；Using continuously casting and continuously rolling technology, damage is cut in reduction end to end, is improved yield and is increased efficiency；In conjunction with ferrite
Rolling technique, improves product surface quality and processability, and zerolling is energy saving and reduces production cost etc..Currently, having
Some by ferrite rolling be applied to continuous casting and rolling production line related patents, but its realize real meaning ferrite rolling
Aspect there are still：1, temperature control capability is insufficient；2, finish rolling total reduction is inadequate；3, the problems such as ferritic transformation is insufficient, production
Raw reason is as follows：1, ferrite rolling requires low temperature open rolling high temperature coiling, existing continuous casting and rolling production line mm finishing mill unit logical
Normal continuous and parallel is arranged as 5~7 racks, is arranged so temperature control (the low temperature open rolling that can not meet ferrite rolling simultaneously
High temperature coiling) and finish rolling total reduction control (55%~75%) two requirement, if in order to ensure low temperature open rolling and enough
Total reduction, then strip temperature drop is excessive after 5~7 rack finish rolling, can not ensure outlet temperature and coiling temperature requirement, if
Ensure low temperature open rolling and high temperature coiling requirement when 5~7 rack rollings, then the temperature drop during controlled rolling, continuous casting is needed to connect
The speed monolithic stability (completely coherent from continuous casting to batching) for rolling production line, can not be by improving local mill speed control temperature
Drop can only reduce temperature drop by reducing the distance that rack reduced number strip is run in air, and reduce rack quantity meeting
Make the reduction of finish rolling total reduction, to influence properties of product；2, current continuous casting and rolling production line structure characteristics of compact layout, does not give
Austenite reserves fringe time to ferritic transformation, prevents finish rolling from being carried out completely in ferrite area, can also influence final products
Performance.
In addition, from the point of view of current Chinese environmental protection and steel release production capacity pressure, it is necessary to work out a kind of new mild steel
Continuous casting and rolling production line and its production technology push the work of continuous casting and rolling production line ferrite rolling to ensure the quality of product
Industry application.
Invention content
In view of this, the purpose of the present invention is to provide a kind of mild steel continuous casting and rolling production line and its production technology, with
Rational producing line arrangement, is realized：1, final rolling temperature is rationally controlled, low temperature open rolling high temperature coiling realizes ferrite rolling；2, ensure
Enough finish rolling reduction ratios；3, so that strip is completed austenite before entering finish rolling to ferritic complete transformation, ensure that finish rolling exists
Ferrite area carries out, to realize the continuous casting and rolling production line ferrite rolling of real meaning.
In order to achieve the above objectives, the present invention provides the following technical solutions：
A kind of mild steel continuous casting and rolling production line, including pass sequentially through slab caster, high pressure water that roller-way connects and slightly remove
Squama device, roughing mills, pendulum cut, releases and sheet piling device, rotary drum flying shear, waste material removal device, induction heater, high pressure crystal
Descaling device, intermediate rolling machine frame, intermediate water cooling plant, mm finishing mill unit, cooling facility for laminar flow, high-speed flying shear and coiling machine；Institute
It includes three pony roughing mills to state roughing mills；The mm finishing mill unit includes four finishing stands, and the setting of four finishing stands was both
Meet requirement of the ferrite rolling to finish rolling total reduction (55%~75%), its spacing may be implemented right after low temperature open rolling again
The requirement of outlet temperature and coiling temperature, while meeting temperature control and the finish rolling total reduction control two of ferrite rolling
It is required that；Intermediate rolling machine frame can carry out thickness to strip and be thinned, then reach product objective thickness by four finishing stand rollings
The requirement of degree；The intermediate rolling machine frame and first finishing stand centreline space are 10m~20m away from L, in being equipped between two racks
Between water cooling plant, so that belt steel temperature is cooled to austenite to ferritic transformation region, intermediate rolling machine frame and finish rolling by water cooling
The setting of first rack spacing makes strip have time enough to be gradually converted into ferrite from austenite, makes strip into finish rolling
Preceding completion austenite is carried out to ferritic transformation, finish rolling in ferrite area.
A kind of production technology using above-mentioned mild steel continuous casting and rolling production line includes the following steps：It is casting continuously to form base → height
Press the thick de-scaling of water → roughing mills roughing → pendulum shearing → release and pile plate → rotary drum flying shear shearing → waste material removal → induction
Heating → high pressure crystal de-scaling → centre rolling → centre water cooling → mm finishing mill unit rolling → section cooling → high-speed flying shear bundling
→ coiling machine batches.
Preferably, the intermediate rolling inlet temperature is 950 DEG C~1000 DEG C.
Preferably, the mm finishing mill unit rolling inlet temperature is 830 DEG C~870 DEG C.
Preferably, the mm finishing mill unit rolling outlet temperature is 740 DEG C~780 DEG C.
Preferably, it is 55%~75% that the mm finishing mill unit, which adds up reduction ratio,.
Preferably, the temperature that the coiling machine batches is 650 DEG C~680 DEG C.
Preferably, the water pressure of the thick de-scaling of the high pressure water and high pressure crystal's de-scaling is 18MPa~22MPa.
Preferably, the Chemical Composition in Cast Billet mass percent for being casting continuously to form base step is respectively：C≤0.05%, Mn≤
0.1%, Si≤0.05%, P≤0.015%, S≤0.003%, Als≤0.05%, surplus are Fe and impurity.
Preferably, the roughing mills roughing inlet temperature is 980 DEG C~1030 DEG C, and the sensing heating outlet temperature is
980 DEG C~1030 DEG C, the slab caster pulling speed of continuous casting 4m/min~7m/min, slab thickness is 70mm~110mm.
The beneficial effects of the present invention are：The present invention is based on the rollings that thin slab continuous casting and rolling and ferrite rolling are combined
Technology, by the way that an intermediate rolling machine frame, intermediate rolling machine frame and first essence are arranged between roughing mills and mm finishing mill unit
The centreline space of mill stand is away from intermediate water cooling plant is arranged for 10m~20m, between two racks, then uses four rack finish rolling.It rolls centre
Rack processed first carries out thickness to strip and is thinned, then reaches the requirement of product objective thickness by four finishing stand rollings；Four
The setting of finishing stand can meet simultaneously under the temperature control (low temperature open rolling high temperature coiling) and finish rolling stagnation pressure of ferrite rolling
Rate controls (55%~75%) two requirements；Intermediate water cooling plant between centre rolling and finishing stand makes belt steel temperature be cooled to
Austenite is to ferritic transformation region, and when the setting of intermediate rolling machine frame and finish rolling the first rack spacing makes strip have enough
Between from austenite be gradually converted into ferrite, strip completes austenite to ferritic transformation before entering finishing mill, and finish rolling exists
Ferrite area carries out.To not only ensure that the open rolling of ferrite rolling low temperature and the requirement of high temperature coiling, but also meets ferrite and roll
Make requirement to finish rolling total reduction (55%~75%), it is also contemplated that austenite wants the time to ferrite transformation process
It asks, realizes the ferrite rolling of real meaning, for pushing the industrial applications of continuous casting and rolling and ferrite rolling that there is weight
The meaning wanted.
Description of the drawings
In order to keep the purpose of the present invention, technical solution and advantageous effect clearer, the present invention provides following attached drawing and carries out
Explanation：
Fig. 1 is a kind of mild steel continuous casting and rolling production line layout drawing of the present invention.
It is marked in attached drawing as follows：The thick descaling device 2 of slab caster 1, high pressure water, roughing mills 3, pony roughing mill 31, pendulum
Cut 4, release and sheet piling device 5, rotary drum flying shear 6, waste material removal device 7, induction heater 8, high pressure crystal descaling device 9, in
Between rolling machine frame 10, intermediate water cooling plant 11, mm finishing mill unit 12, finishing stand 121, cooling facility for laminar flow 13, high-speed flying shear 14,
Coiling machine 15.
Specific implementation mode
Below in conjunction with attached drawing, the preferred embodiment of the present invention is described in detail.
A kind of mild steel continuous casting and rolling production line, including pass sequentially through slab caster 1, high pressure water that roller-way connects and slightly remove
Squama device 2, roughing mills 3, pendulum cut 4, release and sheet piling device 5, rotary drum flying shear 6, waste material removal device 7, induction heater 8,
High pressure crystal descaling device 9, intermediate rolling machine frame 10, intermediate water cooling plant 11, mm finishing mill unit 12, cooling facility for laminar flow 13, height
Fast flying shear 14 and coiling machine 15；The roughing mills 3 include three pony roughing mills 31；The mm finishing mill unit 12 includes four finish rolling
Rack 121, the intermediate rolling machine frame 10 and first 121 centreline space of finishing stand are 10m~20m away from L.
Conventional production lines are generally contiguous to be arranged in juxtaposition 5~7 finishing stands 121 to obtain the destination organization and thickness of product
Degree, and intermediate rolling machine frame 10 and intermediate water cooling plant 11 are not provided between roughing and finish rolling.In comparison, of the invention
Main innovation point be that：Continuous casting and rolling and ferrite rolling technology are combined, in traditional roughing mills 3 and finishing mill
The intermediate rolling machine frame 10 of setting one between group 12, four finishing stands 121 meet the temperature control of ferrite rolling simultaneously
(low temperature open rolling high temperature coiling) and finish rolling total reduction control (55%~75%) two requirements.Intermediate rolling machine frame 10 and and its
Intermediate water cooling plant 11 is set between nearest finishing stand 121, and the L that keeps at a distance is 10m~20m.In the life that invention provides
In producing line, the strip after roughing carries out thickness by intermediate rolling machine frame 10 first and is thinned, then is made by intermediate water cooling plant 11
Belt steel temperature is cooled to austenite to ferritic transformation region, when the spacing setting that L is 10m~20m makes strip have enough
Between from austenite be gradually converted into ferrite, so that strip is completed austenite before entering finish rolling to ferritic transformation, finish rolling energy
It is enough to be carried out completely in ferrite area, and ensure that finish rolling adds up reduction ratio ＞ 55%.
Technical solution of the present invention is illustrated below in conjunction with two embodiments：
Embodiment one
Low carbon steel cast piece raw material chemical composition mass percent is respectively：C：0.04%, Mn：0.07%, Si：
0.03%, P：0.012%, S：0.002%, Als：0.022%, surplus is Fe and impurity, after the raw material are smelted
Base, pulling speed of continuous casting 5.5m/min, thickness of strand 90mm are cast into conticaster.
The thick de-scaling of high pressure water that the strand of continuous casting outlet is used to 20MPa enters back into roughing mills rolling, roughing entrance temperature
Degree be 1010 DEG C, then successively carry out pendulum cut, release and pile plate, rotary drum flying shear, waste material removal etc. devices, subsequently into sensing heating
Stove 8 heats, and the control of sensing heating outlet temperature is 1010 DEG C, then using high pressure crystal's de-scaling of 20MPa, subsequently enters centre and roll
Rack 10 processed, centre rolling inlet temperature is 970 DEG C, is then cooled down by intermediate water cooling plant 11, keeps belt steel temperature cold
But to austenite to ferritic transformation region, intermediate rolling machine frame is 15m with finish rolling the first frame central point spacing, can make strip
There is time enough to be gradually converted into ferrite from austenite, strip is made to complete austenite before entering finishing mill to ferritic
Transformation, finish rolling are carried out in ferrite area.It is 850 DEG C that mm finishing mill unit, which rolls inlet temperature, regulates and controls to obtain by intermediate water cooling plant.
It is 750 DEG C that mm finishing mill unit, which rolls outlet temperature,.It is 70% that finish rolling, which adds up reduction ratio, and strip has enough stored energies, is promoted
It into Recrystallization nucleation and grows up, to obtain uniform, coarse ferrite crystal grain, product is made to have better mouldability.Four essences
The setting of mill stand while temperature control (low temperature open rolling high temperature coiling) and the finish rolling total reduction control for meeting ferrite rolling
Make (55%~75%) two requirements.It is batched at 680 DEG C after section cooling and flying shear bundling rapidly after the completion of finish rolling, temperature
Degree is controlled by cooling facility for laminar flow.
Strip finished product thickness 1.2mm in the present embodiment, tensile strength 317MPa, yield strength 201MPa, yield tensile ratio 0.63,
Elongation 42.3%.Therefore, using in the present invention production-line arrangement and technological parameter select, the excellent production of availability
Product.
Embodiment two
Low carbon steel cast piece raw material chemical composition mass percent is respectively：C：0.013%, Mn：0.08%, Si：
0.03%, P：0.013%, S：0.001%, Als：0.028%, surplus is Fe and impurity, after the raw material are smelted
Base, pulling speed of continuous casting 5.5m/min, thickness of strand 90mm are cast into conticaster.
The thick de-scaling of high pressure water that the strand of continuous casting outlet is used to 20MPa enters back into roughing mills rolling, roughing entrance temperature
Degree be 1010 DEG C, then successively carry out pendulum cut, release and pile plate, rotary drum flying shear, waste material removal etc. devices, subsequently into sensing heating
Stove 8 heats, and the control of sensing heating outlet temperature is 1010 DEG C, then using high pressure crystal's de-scaling of 20MPa, subsequently enters centre and roll
Rack 10 processed, centre rolling inlet temperature is 960 DEG C, is then cooled down by intermediate water cooling plant 11, keeps belt steel temperature cold
But to austenite to ferritic transformation region, intermediate rolling machine frame is 15m with finish rolling the first frame central point spacing, can make strip
There is time enough to be gradually converted into ferrite from austenite, strip is made to complete austenite before entering finishing mill to ferritic
Transformation, finish rolling are carried out in ferrite area.It is 860 DEG C that mm finishing mill unit, which rolls inlet temperature, regulates and controls to obtain by intermediate water cooling plant.
It is 760 DEG C that mm finishing mill unit, which rolls outlet temperature,.It is 71% that finish rolling, which adds up reduction ratio, and strip has enough stored energies, is promoted
It into Recrystallization nucleation and grows up, to obtain uniform, coarse ferrite crystal grain, product is made to have better mouldability.Four essences
The setting of mill stand while temperature control (low temperature open rolling high temperature coiling) and the finish rolling total reduction control for meeting ferrite rolling
Make (55%~75%) two requirements.It is batched at 680 DEG C after section cooling and flying shear bundling rapidly after the completion of finish rolling, temperature
Degree is controlled by cooling facility for laminar flow.
Strip finished product thickness 1.2mm in the present embodiment, tensile strength 304MPa, yield strength 188MPa, yield tensile ratio 0.62,
Elongation 41.8%.Therefore, using in the present invention production-line arrangement and technological parameter select, the excellent production of availability
Product.
It can be seen from the above embodiments that, mild steel continuous casting and rolling production line of the present invention and production method, pass through
The setting of intermediate rolling machine frame and four finishing stands, intermediate rolling machine frame are arranged with finishing mill the first rack spacing, Yi Jijing
The setting of intermediate water cooling before the first rack of milling train, not only ensure that the open rolling of ferrite rolling low temperature and the requirement of high temperature coiling, but also full
Foot requirement of the ferrite rolling to finish rolling reduction ratio (55%~75%), it is also contemplated that austenite is to ferrite transformation process pair
The requirement of time realizes the ferrite rolling of real meaning, can produce the product of molding better performances.The production line, which removes, to be had
Outside above-mentioned advantage, also there is structure characteristics of compact layout, technological process is brief, small investment；Using continuously casting and continuously rolling technology, reduction is cut end to end
Damage improves yield and increases efficiency；In conjunction with ferrite rolling technology, improve product surface quality and processability, zerolling
The advantages such as energy saving and reduction production cost.It is important for pushing the industrial applications of continuous casting and rolling and ferrite rolling to have
Meaning.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (10)
1. a kind of mild steel continuous casting and rolling production line, it is characterised in that：Slab caster, height including passing sequentially through roller-way connection
The thick descaling device of pressure water, roughing mills, pendulum cut, release and sheet piling device, rotary drum flying shear, waste material removal device, induction heater,
High pressure crystal descaling device, intermediate rolling machine frame, intermediate water cooling plant, mm finishing mill unit, cooling facility for laminar flow, high-speed flying shear and volume
Take machine；The roughing mills include three pony roughing mills；The mm finishing mill unit includes four finishing stands；The intermediate roll mill
Frame and first finishing stand centreline space are 10m~20m away from L；In being equipped between the intermediate rolling machine frame and mm finishing mill unit
Between water cooling plant, so that belt steel temperature is cooled to austenite to ferritic transformation region, intermediate rolling machine frame and finish rolling by water cooling
The setting of first finishing stand spacing of unit makes strip have time enough to be gradually converted into ferrite from austenite, makes band
Steel completes austenite to ferritic transformation before entering finish rolling, and finish rolling is carried out in ferrite area.
2. a kind of production technology using mild steel continuous casting and rolling production line described in claim 1, it is characterised in that including with
Lower step：It is casting continuously to form the thick de-scaling of base → high pressure water → roughing mills roughing → pendulum shearing → release and pile plate → rotary drum flying shear is cut
Cut → waste material removal → sensing heating → high pressure crystal de-scaling → centre rolling → centre water cooling → mm finishing mill unit rolling → laminar flow
Cooling → high-speed flying shear bundling → coiling machine batches.
3. the production technology of mild steel continuous casting and rolling production line according to claim 2, it is characterised in that：It rolls the centre
Inlet temperature processed is 950 DEG C~1000 DEG C.
4. the production technology of mild steel continuous casting and rolling production line according to claim 2, it is characterised in that：The finishing mill
Group rolling inlet temperature is 830 DEG C~870 DEG C.
5. the production technology of mild steel continuous casting and rolling production line according to claim 2, it is characterised in that：The finishing mill
Group rolling outlet temperature is 740 DEG C~780 DEG C.
6. the production technology of mild steel continuous casting and rolling production line according to claim 2, it is characterised in that：The finishing mill
The accumulative reduction ratio of group is 55%~75%.
7. the production technology of mild steel continuous casting and rolling production line according to claim 2, it is characterised in that：The coiling machine
The temperature batched is 650 DEG C~680 DEG C.
8. the production technology of mild steel continuous casting and rolling production line according to claim 2, it is characterised in that：The high pressure water
The water pressure of thick de-scaling and high pressure crystal's de-scaling is 18MPa~22MPa.
9. the production technology of mild steel continuous casting and rolling production line according to claim 2, it is characterised in that：It is described to be casting continuously to form
The Chemical Composition in Cast Billet mass percent of base step is respectively：C≤0.05%, Mn≤0.1%, Si≤0.05%, P≤
0.015%, S≤0.003%, Als≤0.05%, surplus are Fe and impurity.
10. the production technology of mild steel continuous casting and rolling production line according to claim 2, it is characterised in that：The roughing
Unit roughing inlet temperature is 980 DEG C~1030 DEG C, and the sensing heating outlet temperature is 980 DEG C~1030 DEG C, the slab
Conticaster pulling speed of continuous casting 4m/min~7m/min, slab thickness are 70mm~110mm.
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| CN109647884A (en) * | 2019-01-25 | 2019-04-19 | 北京科技大学 | A kind of endless casting rolling produces the method and device of plate in high quality |
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| CN110479762A (en) * | 2019-08-15 | 2019-11-22 | 武汉钢铁有限公司 | A kind of hot-strip completely continuous manufacturing device and method for ferrite rolling |
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| CN114101325A (en) * | 2021-11-19 | 2022-03-01 | 一重集团大连工程技术有限公司 | Endless rolling accident treatment process and equipment arrangement |
| CN114173957A (en) * | 2019-07-24 | 2022-03-11 | 首要金属科技奥地利有限责任公司 | Production of deep-drawable steel strip in a combined casting and rolling installation |
| CN114273425A (en) * | 2021-12-13 | 2022-04-05 | 中冶赛迪工程技术股份有限公司 | Continuous casting and rolling production line and production method for avoiding ferrite rolling mixed crystals |
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| CN110479762B (en) * | 2019-08-15 | 2020-10-30 | 武汉钢铁有限公司 | Hot-rolled strip steel full-continuous production device and method for ferrite rolling |
| CN111589865A (en) * | 2020-05-26 | 2020-08-28 | 中冶赛迪工程技术股份有限公司 | Low-yield-ratio thin strip steel continuous casting and rolling production line and production process |
| CN111842483A (en) * | 2020-07-02 | 2020-10-30 | 武汉科技大学 | Multi-mode energy-saving hot-rolled strip steel production line and using method thereof |
| US20230271247A1 (en) * | 2020-07-23 | 2023-08-31 | Primetals Technologies Austria GmbH | Casting-rolling integrated plant for producing a hot-rolled finished strip from a steel melt |
| CN112676341A (en) * | 2020-12-03 | 2021-04-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot rolling method of low-carbon steel |
| CN112974519A (en) * | 2021-03-31 | 2021-06-18 | 武钢集团昆明钢铁股份有限公司 | Economical welding headless rolled bar production line process arrangement and production method |
| CN113617836A (en) * | 2021-06-21 | 2021-11-09 | 日照钢铁控股集团有限公司 | Rolling process for producing low-energy-consumption headless ferrite strip steel |
| CN114101325A (en) * | 2021-11-19 | 2022-03-01 | 一重集团大连工程技术有限公司 | Endless rolling accident treatment process and equipment arrangement |
| CN114273425A (en) * | 2021-12-13 | 2022-04-05 | 中冶赛迪工程技术股份有限公司 | Continuous casting and rolling production line and production method for avoiding ferrite rolling mixed crystals |
| CN114273425B (en) * | 2021-12-13 | 2023-11-03 | 中冶赛迪工程技术股份有限公司 | Continuous casting and rolling production line and production method for avoiding ferrite rolling mixed crystals |
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