CN107597844A - The ferrite rolling method and apparatus that endless casting rolling deep-draw is rolled up with humble carbon steel - Google Patents
The ferrite rolling method and apparatus that endless casting rolling deep-draw is rolled up with humble carbon steel Download PDFInfo
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Abstract
The ferrite rolling method and apparatus that a kind of endless casting rolling deep-draw is rolled up with humble carbon steel, belong to metallurgical steel rolling field.The ferrite rolling method and apparatus that endless casting rolling production deep-draw is rolled up with humble carbon steel are batched to be casting continuously to form base → roughing mills roughing → cooling duct temperature control → high-pressure water descaling → mm finishing mill unit ferrite rolling → layer device for cooling cooling → high-speed flying shear bundling → coiling machine.The inventive method and device before solving conventional hot rolling technology roughing need that the problem of temperature cooling need to be treated between heating stove heat/soaking, austenitic area roughing and ferrite area finish rolling because the temperature difference is big and the continuous casting and rolling technique of sheet bar using CSP as representative need to heat stove heat/soaking or sensing heating mends the problems such as temperature, with characteristics of compact layout, small investment, production efficiency height, safe and reliable, energy-conserving and environment-protective and the advantages such as cost are reduced, realize endless casting rolling and ferrite rolling production deep-draw low-carbon/micro- carbon steel volume.
Description
Technical field
The invention belongs to metallurgical technical field of steel rolling, specifically provides a kind of endless casting rolling production humble carbon of deep-draw
The ferrite rolling method and apparatus of coil of strip.
Background technology
Thin plate blank continuously casting and continuously rolling technology is the new technology occurred late 1980s.Mainly there is the CSP of German SMS companies
Technique, heated using roller hearth furnace, soaking and insulation, the CPR techniques cooperated with German Thyssen factories can realize that half is without a head
Rolling；The ISP techniques of German MDS companies, the middle sensed heating of base and the box soaking of hot rolling, can be achieved semi-endless rolled；Meaning
The FTSR techniques of great Li Danieli companies, there is wick-containing Reduction Technology, the roughing after roller-bottom type tunnel stove heat, insulation, finish rolling
Insulating roller way is provided between roughing；The QSP techniques of SUMITOMO CHEMICAL metal, continuous casting billet heats through roller hearth furnace, between roughing and finish rolling
For the intermediate transfer roller road with heating function；The CONROLL techniques of VAI, there are induction type strip edge heater and roller-bottom type equal
Hot stove；The ESP techniques of Italian Arvedi companies, continuous casting include wick-containing pressure, slighter compress etc., using sensing between finish rolling and roughing
Heating, endless rolling can be achieved." a kind of strip production technology-ESP " (Lv Kunyong, Chinese patent, 200510057404.5) carry
A kind of new E SP techniques are gone out：Conticaster (wick-containing pressure) → swinging shears divide base → heating furnace → de-scaling → roughing mill → de-scaling
→ mm finishing mill unit → section cooling → coiling machine.The BCT techniques of German SMS companies, Direct Rolling after continuous casting, can continuous casting 15mm it is thick
Non- finished product steel belt, but the technology is not overripened, the HSD steel grade high currently used for manganese, silicon, aluminium content.And conventional semicontinuous heat
Roll process uses monolithic slab rolling, and slab is heated through roller hearth furnace, soaking and insulation, need to be adopted when producing thin slab product
Use Coil Box.
Endless rolling and semi-endless rolled technology be occur in recent years reduce energy consumption, improve efficiency, reduce cost
Steel plate rolling new technology, stable performance secondary by the gross can be achieved.Endless rolling is mainly used in hot-strip and Bar Wire Product production
In, it is semi-endless rolled to be mainly used in CSP production.First Total continuity endless rolling hot-continuous-rolling strip steel machine
It is to be come into operation in Japanese Chiba factory of JFE companies for 1996, the sensing heating connection method that middle base uses, with conventional hot continuous rolling machine phase
Than lumber recovery can improve 1% -2%, and roller consumption reduces by 1% -2%.Subsequent nippon and South Korea's Pu item enter to its hot continuous rolling
Endless rolling transformation is gone.At present, after roughing among the connection method of base mainly have ply rolling connection method, exothermic welding connection method, straight
Electrical connection method, sensing heating connection method, laser heating connection method, mechanical shearing+pressing connection method etc. are connected, wherein " hot-rolled strip
The connection method of base among steel endless rolling " (Kang Yonglin, Chinese patent, 201010289783.1) propose a kind of middle base warp
The connection method of crop end-knob-overlap joint-pressing.A Erweidi companies built up in 2009 in the world first it is without a head
Continuous casting and rolling production line ESP, compared with conventional hot continuous rolling machine, energy consumption can improve 40% -75%, and production efficiency improves 25% -
30%.
Rolling in ferrite domains (also known as warm-rolling, Warm Rolling) is late 1980s by Belgian steel research
Center research and development, it is therefore an objective to produce it is a kind of can be used directly or for subsequent cold rolling production it is cheap, matter is soft, non-timeliness
Hot rolled plate, it causes the common concern of countries in the world scholar and research.Because of ultra-low-carbon steel (carbon content<0.01%) iron element
Body area scope is big and temperature is high, therefore rolling in ferrite domains is mainly used in the production of IF steel at present." rolled for producing ferrite
The method and apparatus of steel strip " (An Delieboding, Chinese patent, 98811974.9) propose suitable for mild steel and IF steel
Technique：Continuous casting → tunnel stove heat → cuts into the strong cold → uncoiling case storage of slab section → roughing mills roughing → strong device for cooling
→ shearing → de-scaling → finish rolling → cooling/heating → is sheared → batched." the production equipment and ferrite of ferrite stainless steel bars band
The production technology of band " (W Luo De, Deutsche Bundespatent, 19531538.3；Chinese patent, 96112270.6) propose and be applied to
The technique of mild steel：Continuous casting → heating → roughing → finish rolling → cooling → (batching) → strip milling train → is batched." roll ferrite area
Temperature control system processed " (Rongchang County perhaps, Chinese patent, 201010548338.2) propose by setting up temperature sensor and steel billet
Rolling temperature control system realizes ferrite region rolling on conventional hot rolling line." CSP ferrite rolls
Technique processed " (Chen Yuguang, Chinese patent, 201310723913.1) proposes≤the rolling temperature control methods of 2mm thin plates, it adds
Hot 1100 DEG C -1300 DEG C of temperature, 600 DEG C -700 DEG C of final rolling temperature.It is " a kind of to be given birth in CSP producing lines using rolling in ferrite domains
The method for producing mild steel " (Du Xiufeng, Chinese patent, 201610759108.8) proposes the technique suitable for mild steel：Continuous casting
→ heating → de-scaling → rolling → section cooling → is batched, 1020 DEG C -1080 DEG C of strand tapping temperature, and finished product thickness 2mm -
6mm." a kind of ferrite rolling method " (Wang Jiangong, Chinese patent, 201611039422.5) propose roughing R2 last
Passage forward swing steel enters the method for mm finishing mill unit forward swing steel and reduces board briquette, so as to ensure final rolling temperature control to iron element
In temperature scope." a kind of finishing rolling control method and apparatus of rolling in ferrite domains " (Wang Jiangong, Chinese patent,
201611059348.3) propose and the matter of ferritic steel is ensured come the method for controlled rolling parameter error by Model Self-Learning
Amount." based on the ferritic method of ESP bar strip continuous casting and rolling flow paths production mild steel " (Zhou Hongbao, Chinese patent,
201610768866.6) propose based on the ESP production ferritic methods of mild steel：Converter smelting → LF stoves smelting → RH stove smeltings
Room temperature → pickling → smooth is batched → is cooled in refining → continuous casting → roughing → sensing heating → de-scaling → finish rolling → section cooling →
→ straightening → batch.Document " FTSR production line ferrite rolling low carbon steel plates technical study " (Li Yiwei, the tenth Chinese Technology Association
Nd Annual Meeting collection (four)：1172—1176；National Rolling production technical conference collected works in 2008:111-114) technique road is proposed
Line is：Continuous casting → soaking pit → 1880mm milling trains (roughing → rapid cooling → finish rolling) → section cooling → batches → cold rolling → recrystallization
Annealing." low-carbon hot-rolled deep-drawing steel and its manufacture method " (Huang Zhenru, Chinese patent, 200510111009.0) propose finish rolling
Temperature control is 830 DEG C -900 DEG C the methods of." CSP production lines produce the process of pickling deep-drawing board " (Xu Bin, China is specially
Profit, 201410152421.6) the tapping temperature control for proposing soaking process is 1040 DEG C -1080 DEG C, and final rolling temperature control is
860 DEG C -910 DEG C the methods of.
The characteristics of any of the above ferrite rolling method and thin plate blank continuously casting and continuously rolling technology respectively have oneself, but because it is limited by
Existing conventional hot rolling line and sheet billet continuous casting and rolling production line, therefore there is also needed before the deficiency of itself, particularly roughing
Carry out before heating stove heat, finish rolling needing after sensing heating, hot rolling before Coil Box storage or finish rolling forward swing steel, finish rolling carrying out cold rolling,
Finishing or annealing etc., while monolithic or semi-endless rolled technology are used substantially, even if passing through base attachment means among increasing
Etc. transforming endless rolling as, but still the difficult control of process temperature, low production efficiency, high energy consumption, investment needed for heating be present greatly etc.
Problem.In order to reduce production cost and realize the reliable industrialized production of steady and continuous, scholars, researcher and industry
Boundary is still being continually striving to and explored, it is intended to finds new ferrite rolling technology and device.At present in the world without continuous casting without a head
The relevant report of the ferrite rolling method and apparatus of tandem rolling.Meanwhile come from current Chinese environmental protection and steel release production capacity pressure
See, still need to propose new sheet billet ferrite rolling method and apparatus, reach simplified technique, reduce cost, improve the mesh such as efficiency
, the industrial applications of promotion endless casting rolling and ferrite rolling.
In addition, the Thin Specs mild steel huge market demand for deep-draw rank, it is desirable to which there is relatively low intensity, higher
Elongation and small ageing, is mostly cold-reduced sheet.Research shows that conventional hot rolling Thin Specs can cover current about 13%-25%
Cold-reduced sheet, China is " with ten thousand tons of hot Dai Leng " annual requirement about 1000-1500.With the progress of technology, using hot rolling
Technique substitutes traditional hot rolling+cold-rolling process production deep punching steel, realizes that " cold with the torrid zone " turns into the new of product development and process exploitation
Focus；Or exploitation can reduce cold rolling number better than the Thin Specs high-quality hot rolling of traditional hot rolling as cold rolling base, improve cold rolling
The forming property of steel band afterwards, meet ultra-deep punching or the requirement of deep-draw cold-reduced sheet.
The content of the invention
It is an object of the invention to solve technique stream present on existing deep-draw low-carbon/micro- carbon steel production method and device
Journey complexity, low production efficiency, the problem of energy consumption is big, cost is high, lumber recovery is low, stability is poor, there is provided a kind of company without a head
The ferrite rolling method and apparatus that casting rolling production deep-draw is rolled up with humble carbon steel.The device innovates traditional continuously casting and continuously rolling technology,
Using endless casting rolling technique, reduce gas flame cuttiug after conventional continuous casting into the technique of slab section and improve site environment,
Descaling process after heating of plate blank technique and heating when reducing pair rolling, while whole pour time only carries out a crop and cut
Tail, default continuous casting cutting scaling loss, the oxidization burning loss of heating furnace, furnace fuel and energy consumption, the energy consumption of high-pressure water descaling and water
Consumption etc., significantly reduces the loss of crop and back-end crop, improves yield, lumber recovery and stability；Using sheet billet technology
With the high pulling rate technology of continuous casting, traditional pulling rate≤3m/min is brought up into 4m/min -7m/min, by 5 traditional passages or 7
Secondary roughing is reduced to 3 passages, and 7 traditional passage finish rolling are reduced into 5 passages, improve production efficiency and yield；Using iron element
Body rolling technique, rolled different from traditional austenitic area, roughing is controlled into 1020 DEG C -950 DEG C Austria in rolling stress low ebb
Family name's temperature area is rolled, by finishing rolling control rolling stress low ebb 850 DEG C -730 DEG C of austenite and ferrite two-phase
Area rolls or ferrite region rolling, can obtain the excellent high-quality hot rolling of forming property, while by cooling duct temperature control come really
Final rolling temperature hit is protected, and prevents the finish rolling stage from pearlitic transformation occurs and causes rolling stress to increase, air cooling or air-cooled can be used
Etc. mode；Batch and use higher temperature 710 DEG C -580, be in order to using roll rear waste heat realize ferrite reply and grow up, discharge
Two-phase section rolling stress etc., improve deep drawability, the follow-up annealing of default.Layer device for cooling cooling is in order to ensure batching temperature
In dragging out a miserable existence, prevent from generating thick pearlite or cementite after batching, influence the Deep-drawing property of hot plate.High-speed flying shear bundling be for
Obtain the volume weight needed.High-pressure water descaling is to obtain good hot rolling surface quality before finish rolling, while mm finishing mill unit is entered
Row lubrication and rolling can also reduce draught pressure and improve hot rolling surface quality.It is low using the control nitrogen containing alloyings such as B, Ti, Cr, Al
Carbon/micro- carbon steel advantageously reduces aging phenomenon, improves pulling speed of continuous casting and carries out rolling temperature control, beneficial to realizing that continuous casting without a head connects
Roll, mass production deep-draw can be achieved and be used as deep-draw or ultra-deep punching cold rolling base by the use of hot rolling or high-quality hot rolling.
Low-carbon provided by the invention/micro- carbon steel chemistry composition and weight/mass percentage composition are：C：0.008-0.06%, Si≤
0.10%, Mn≤0.25%, B≤0.0020%, Ti≤0.030%, Cr≤0.25%, Als：0.010-0.060%, P≤
0.020%, S≤0.015%, N≤0.005%, remaining is Fe and inevitable impurity.
The effect of main alloy element and mechanism：
B：Main function in steel is the quenching degree for increasing steel, and the temperature in high pulling rate and the operation of rolling is used beneficial to continuous casting
Degree control, but it weakens with the increase of carbon content in steel；Boron and nitrogen and oxygen have strong affinity simultaneously, and adding certain content can
With the precipitation for eliminating the aging phenomenon of steel and suppressing AlN.
Ti：Titanium and nitrogen, oxygen, carbon have extremely strong affinity, stronger than iron with the affinity of sulphur, are that a kind of good deoxidation is gone
Gas agent and the effective element of fixed nitrogen and carbon, the aging phenomenon of steel can be eliminated；Titanium is also strong ferrite formation element, strong
A1 the and A3 temperature of steel is improved, ferrite rolling temperature is improved, beneficial to the control of rolling temperature.
Cr：Main function in steel is the quenching degree for improving steel, is used beneficial to continuous casting in high pulling rate and the operation of rolling
Temperature control；Can improve carbon steel hardness and wearability without making steel become fragile；Simultaneously make steel have good high-temperature oxidation resistance and
The effect of oxidative resistance corrosion；Also increase the heat resistance of steel, there is good temper resistance.
Al：Aluminium is strong deoxidier, and the main function in steel is the nitrogen in crystal grain thinning, fixed steel, so as to significantly improve
The impact flexibility of steel, reduce cold short tendency and timeliness tendentiousness；AlN can influence forming property simultaneously.
N：It with the increase of nitrogen content, can significantly improve the intensity of steel, plasticity particularly toughness is significantly reduced；Together
Shi Zengjia timeliness is inclined to and cold brittleness and red brittleness, damages the welding performance and cold-bending property of steel.Therefore, it should as far as possible reduce and
Limit the nitrogen content in steel.
Production-line technique flow provided by the invention is：Into base → roughing mills roughing → cooling duct temperature control in conticaster
→ high-pressure water descaling → mm finishing mill unit finish rolling → layer device for cooling cooling → high-speed flying shear bundling → coiling machine batches.
Present invention also offers the ferrite rolling device that a kind of endless casting rolling deep-draw is rolled up with humble carbon steel, mainly by
Slab caster 1, roughing mills 2, cooling duct 3, Rolling shear 4, high pressure water descaling device 5, mm finishing mill unit 6, layer device for cooling 7,
High-speed flying shear 8, coiling machine 9 form, and each part is linked in sequence.
Its concrete technology step：
1) it is by low-carbon/micro- carbon steel chemistry composition and weight/mass percentage composition：C：0.008-0.06%, Si≤0.10%, Mn
≤ 0.25%, B≤0.0020%, Ti≤0.030%, Cr≤0.25%, Als：0.010-0.060%, P≤0.020%, S≤
0.015%, N≤0.005%, remaining is Fe and inevitable impurity, is smelted.
2) base is cast into conticaster, the big bag temperature objectives of continuous casting are 1550 DEG C, prevent crystal grain from growing using quick solidification
Big and center segregation；Pulling speed of continuous casting 4m/min -7m/min, slab thickness are 80mm -130mm.
3) roughing mills are sent directly into and carry out roughing, roughing temperature is controlled in 1020 DEG C -950 DEG C of austenitic temperature area,
Roughing mills preferably 3 frames, it is 7mm -25mm that roughing, which terminates rear workpiece thickness,.
4) base enters cooling duct temperature control among, cooling velocity≤6 DEG C/s, can be using air cooling or the weak cold mode such as air-cooled；
Cooling duct temperature control is in order to ensure final rolling temperature hit realizes that ferrite rolling obtains good deep drawability, beneficial to finish rolling temperature
The control of degree.
5) rolling cut cutting head, crop processing is carried out to pouring secondary head base using Rolling shear, no longer entered to time end is entirely poured
Row crop operates, and realizes endless rolling；Emergency can also carry out a point base to slab and handle.
6) high-pressure water descaling, to ensure scale removal effect, de-scaling water pressure >=30MPa, middle base surface before finish rolling is ensured
Totally, prevent iron scale press-in from influenceing hot rolling surface quality.
7) mm finishing mill unit finish rolling, austenite and ferrite two-phase section or iron element of the final rolling temperature control at 850 DEG C -730 DEG C
Body area, mm finishing mill unit preferably 5 frames, it is preferred to use lubrication and rolling, it is 0.7mm -4mm that finish rolling, which terminates rear finished product thickness,.
8) layer device for cooling cools down, and cooling velocity≤25 DEG C/s, can use leading portion, back segment and sub-sectional cooling pattern, it is ensured that this
Stage occurs pearlitic transformation and ensures coiling temperature hit.
9) high-speed flying shear bundling, to ensure cold section of threading effect of layer, high-speed flying shear be arranged on layer it is cold after and before batching；Due to
Using Endless Rolling Technology, cutting volume is carried out by important ask of volume herein.
10) coiling machine batches, in order to using roll rear waste heat realize ferrite reply and grow up, oiler temperature control is 710
DEG C -580 DEG C, natural cooling or slow cooling can be then used to room temperature.
11) low-carbon of production/micro- carbon steel volume performance meets deep-draw requirement, tensile strength 270MPa -400MPa, elongation
>=35%, n value 0.18-0.25, r values 0.8-1.5 can be directly as deep-draw steel；Also deep-draw use or ultra-deep punching can be used as to use
The cold rolling base of ultra-thin gauge steel.
The effect of main technique and mechanism in the present invention：
Using thin plate blank continuously casting and continuously rolling technology, directly rolled after continuous casting, default heating process, structure arrangement is completeer
It is kind, technological process cycle time, small investment；Using Endless Rolling Technology, crop and back-end crop loss are reduced, improves production efficiency
And yield；Using ferrite rolling technology, effectively reduce mill milling pressure, improve tissue and material property, save the energy and
Reduce production cost.
The present invention is compared with the prior art, and has advantages below：
1) control nitrogen low-carbon/micro- carbon steel containing alloyings such as B, Ti, Cr, Al is used, is advantageous to improve pulling speed of continuous casting and progress
Rolling temperature controls, and improves tissue, reduces hot rolling aging phenomenon；Promote carbide to be formed, improve forming property.
2) continuously casting and continuously rolling technology is used, without adding before roller hearth type heating furnace or finish rolling without induction heater to slab
Heat, reduce the input of oxidization burning loss, furnace fuel and energy consumption and equipment, improve recovery rate of iron and lumber recovery, drop
Low energy consumption and investment.
3) the continuous casting flame cutting scaling loss by Endless Rolling Technology default, reduces crop rate and back-end crop rate, improves
Lumber recovery, the operation of rolling are more stable；Using continuously casting and continuously rolling technology, pulling speed of continuous casting is improved, reduces rolling pass and de-scaling time
Number, improves production efficiency and yield.
4) ferrite rolling technology is used, iron scale generation can be reduced, reduce draught pressure, save the energy, improve band
Steel surface quality, optimize microscopic structure and forming property etc.；It can but be realized to finish rolling temperature using cooling duct temperature control and layer are cold
The accurate control of degree and coiling temperature.
5) batch using 710 DEG C -580 DEG C of higher temperature, can make full use of roll rear waste heat realize ferrite crystal grain reply and
Grow up, the processing such as the follow-up annealing of default, cold rolling, realize that, with tropical cold, directly as deep-draw steel, thickness can cover at present about
50% cold-reduced sheet；Simultaneously because using the hot rolling of ferrite rolling there is good combination property to be alternatively arranged as deep-draw
With or the ultra-deep punching cold rolling base of ultra-thin gauge steel.
Brief description of the drawings
Fig. 1 is the ferrite rolling method production line flow process figure that endless casting rolling deep-draw is rolled up with humble carbon steel.In figure：Plate
Billet continuous casting machine 1, roughing mills 2, cooling duct 3, Rolling shear 4, high pressure water descaling device 5, mm finishing mill unit 6, layer device for cooling 7, height
Fast flying shear 8, coiling machine 9.
Fig. 2 is the ferrite rolling method production line temperature profile that endless casting rolling deep-draw is rolled up with humble carbon steel.
Fig. 3 is the ferrite rolling method production line thickness distribution figure that endless casting rolling deep-draw is rolled up with humble carbon steel.
Embodiment
Embodiment 1：
It is by low-carbon steel chemical composition and weight/mass percentage composition：C：0.06%, Si：0.10%, Mn：0.25%, B：
0.0003%, Ti：0.005%, Cr：0.01%, Als：0.060%, P：0.019%, S：0.006%, N：0.0049%, remaining
For Fe and inevitable impurity, smelted.Base is cast into conticaster, the big bag temperature of continuous casting is 1545 DEG C, continuous casting
Pulling rate 4m/min, slab thickness 80mm.It is sent directly into roughing mills and carries out roughing, 990 DEG C -950 DEG C of roughing temperature, roughing
Workpiece thickness is 7mm after end.Middle base enters cooling duct temperature control, 0.3 DEG C/s of cooling velocity, rolling cut cutting head, high pressure
Water de-scaling, de-scaling water pressure 35MPa, mm finishing mill unit finish rolling, final rolling temperature are controlled at 800 DEG C -730 DEG C, and rear 3 passage can use
Lubrication and rolling, finished product thickness 0.7mm.Layer device for cooling cooling, 1 DEG C/s of cooling velocity, high-speed flying shear ask bundling, volume by volume is important
Temperature control is taken at 710 DEG C, can then use natural cooling or slow cooling to room temperature.Performance meets deep-draw requirement, tensile strength
395MPa, elongation 36%, n values 0.18, r values 0.8.
Embodiment 2：
It is by low-carbon steel chemical composition and weight/mass percentage composition：C：0.04%, Si：0.06%, Mn：0.20%, B：
0.0008%, Ti：0.030%, Cr：0.10%, Als：0.042%, P：0.013%, S：0.014%, N：0.0040%, remaining
For Fe and inevitable impurity, smelted.Base is cast into conticaster, the big bag temperature of continuous casting is 1547 DEG C, continuous casting
Pulling rate 5m/min, slab thickness 95mm.It is sent directly into roughing mills and carries out roughing, 1000 DEG C -960 DEG C of roughing temperature, roughing
Workpiece thickness is 13mm after end.Middle base enters cooling duct temperature control, 2 DEG C/s of cooling velocity, rolling cut cutting head, water under high pressure
De-scaling, de-scaling water pressure 33MPa, mm finishing mill unit finish rolling, at 810 DEG C -740 DEG C, rear 2 passage can use profit for final rolling temperature control
Sliding rolling, finished product thickness 1.5mm.Layer device for cooling cooling, 8 DEG C/s of cooling velocity, high-speed flying shear are sought bundling by volume is important, batched
Temperature control can then use natural cooling or slow cooling to room temperature at 670 DEG C.Performance meets deep-draw requirement, tensile strength
350MPa, elongation 39%, n values 0.20, r values 1.0.
Embodiment 3：
It is by micro- carbon steel chemistry composition and weight/mass percentage composition：C：0.018%, Si：0.03%, Mn：0.15%, B：
0.0015%, Ti：0.012%, Cr：0.25%, Als：0.025%, P：0.010%, S：0.009%, N：0.0031%, remaining
For Fe and inevitable impurity, smelted.Base is cast into conticaster, the big bag temperature of continuous casting is 1550 DEG C, continuous casting
Pulling rate 6m/min, slab thickness 110mm.Be sent directly into roughing mills carry out roughing, 1100 DEG C -970 DEG C of roughing temperature, slightly
Workpiece thickness is 20mm after roll bonding beam.Middle base enters cooling duct temperature control, 4 DEG C/s of cooling velocity, rolling cut cutting head, high pressure
Water de-scaling, de-scaling water pressure 33MPa, mm finishing mill unit finish rolling, final rolling temperature are controlled at 825 DEG C -755 DEG C, and last 1 passage can adopt
With lubrication and rolling, finished product thickness 2.5mm.Layer device for cooling cooling, 17 DEG C/s of cooling velocity, high-speed flying shear is by rolling up important ask point
Volume, oiler temperature control can then use natural cooling or slow cooling to room temperature at 625 DEG C.Performance meets deep-draw requirement, and tension is strong
Spend 310MPa, elongation 42%, n values 0.22, r values 1.3.
Embodiment 4：
It is by micro- carbon steel chemistry composition and weight/mass percentage composition：C：0.008%, Si：0.01%, Mn：0.06%, B：
0.0020%, Ti：0.021%, Cr：0.18%, Als：0.011%, P：0.006%, S：0.001%, N：0.0025%, remaining
For Fe and inevitable impurity, smelted.Base is cast into conticaster, the big bag temperature of continuous casting is 1555 DEG C, continuous casting
Pulling rate 7m/min, slab thickness 130mm.Be sent directly into roughing mills carry out roughing, 1020 DEG C -980 DEG C of roughing temperature, slightly
Workpiece thickness is 25mm after roll bonding beam.Middle base enters cooling duct temperature control, 6 DEG C/s of cooling velocity, rolling cut cutting head, high pressure
Water de-scaling, de-scaling water pressure 33MPa, mm finishing mill unit finish rolling, final rolling temperature control is at 850 DEG C -770 DEG C, finished product thickness 4mm.
Layer device for cooling cooling, 25 DEG C/s of cooling velocity, high-speed flying shear seek bundling by volume is important, and oiler temperature control then may be used at 580 DEG C
Using natural cooling or slow cooling to room temperature.Performance meets deep-draw requirement, tensile strength 270MPa, elongation 45%, n values 0.25, r
Value 1.5.
Embodiment 5：
It is by low-carbon steel chemical composition and weight/mass percentage composition：C：0.03%, Si：0.02%, Mn：0.10%, B：
0.0002%, Ti：0.016%, Cr：0.06%, Als：0.032%, P：0.012%, S：0.003%, N：0.0035%, remaining
For Fe and inevitable impurity, smelted.Base is cast into conticaster, the big bag temperature of continuous casting is 1550 DEG C, continuous casting
Pulling rate 5.5m/min, slab thickness 100mm.Be sent directly into roughing mills carry out roughing, 1010 DEG C -970 DEG C of roughing temperature,
It is 15mm that roughing, which terminates rear workpiece thickness,.Middle base enters cooling duct temperature control, 1 DEG C/s of cooling velocity, rolling cut cutting head, height
Pressure water de-scaling, de-scaling water pressure 33MPa, mm finishing mill unit finish rolling, final rolling temperature control are in 820 DEG C -740 DEG C, finished product thickness
1.8mm.Layer device for cooling cooling, 15 DEG C/s of cooling velocity, high-speed flying shear by roll up it is important seek bundling, oiler temperature control at 650 DEG C,
Natural cooling or slow cooling can then be used to room temperature.Performance meets deep-draw requirement, tensile strength 290MPa, elongation 43%, n values
0.21, r value 1.1.
Claims (6)
1. a kind of ferrite rolling method that endless casting rolling deep-draw is rolled up with humble carbon steel, it is characterised in that：The low-carbon/micro-
Carbon steel chemistry composition and weight/mass percentage composition are：C：0.008-0.06%, Si≤0.10%, Mn≤0.25%, B≤
0.0020%, Ti≤0.030%, Cr≤0.25%, Als：0.010-0.060%, P≤0.020%, S≤0.015%, N≤
0.005%, remaining is Fe and inevitable impurity；
Production-line technique flow is to be casting continuously to form base → roughing mills roughing → cooling duct temperature control → high-pressure water descaling → finishing mill
Group ferrite rolling → layer device for cooling cooling → high-speed flying shear bundling → coiling machine batches.
2. the ferrite rolling method that a kind of endless casting rolling deep-draw according to claim 1 is rolled up with humble carbon steel, its
It is characterised by：Using endless casting rolling technology, pulling speed of continuous casting 4m/min -7m/min, slab thickness is 80mm -130mm, in
Between base thickness be 7mm -25mm, finished product thickness is 0.7mm -4mm.
3. the ferrite rolling method that a kind of endless casting rolling deep-draw according to claim 1 is rolled up with humble carbon steel, its
It is characterised by：Using ferrite rolling technology, roughing mills are rolled in 1020 DEG C -950 DEG C of austenitic temperature area；Essence
Milling train group is in 850 DEG C -730 DEG C of austenite and ferrite two-phase section rolling or ferrite region rolling；Cooling duct temperature control be for
Ensure that final rolling temperature is hit, realize that ferrite rolling obtains good deep drawability, cooling velocity≤6 DEG C/s, using air cooling
Or air-cooled weak cold mode；Layer device for cooling cooling is cooling velocity≤25 DEG C/s in order to ensure coiling temperature is hit；Coiling temperature
710 DEG C -580 DEG C be in order to using roll rear waste heat realize ferrite reply and grow up.
4. the ferrite rolling method that a kind of endless casting rolling deep-draw according to claim 1 is rolled up with humble carbon steel, its
It is characterised by：Further to improve hot rolling surface quality and reducing roll-force, mm finishing mill unit is lubricated rolling；To ensure de-scaling
Effect, de-scaling water pressure >=30MPa.
5. the ferrite rolling method that a kind of endless casting rolling deep-draw according to claim 1 is rolled up with humble carbon steel, its
It is characterised by：The deep-draw of this method production meets tensile strength 270MPa -400MPa with humble carbon steel volume performance, elongation >=
35%, n value 0.18-0.25, r values 0.8-1.5 can be directly as deep-draw steel；Or rushed as deep-draw use or ultra-deep with ultra-thin
The cold rolling base of gauge steel.
6. the ferrite rolling device that a kind of endless casting rolling deep-draw is rolled up with humble carbon steel, it is characterised in that rolling device is by plate
Billet continuous casting machine (1), roughing mills (2), cooling duct (3), Rolling shear (4), high pressure water descaling device (5), mm finishing mill unit (6),
Layer device for cooling (7), high-speed flying shear (8), coiling machine (9) composition, each part are linked in sequence.
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| CN108526221A (en) * | 2018-06-25 | 2018-09-14 | 中冶赛迪技术研究中心有限公司 | A kind of mild steel continuous casting and rolling production line and its production technology |
| CN108723099A (en) * | 2018-06-06 | 2018-11-02 | 日照钢铁控股集团有限公司 | A kind of ferrite rolling method and device based on output strip line without a head |
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| CN112090958A (en) * | 2020-08-03 | 2020-12-18 | 大冶特殊钢有限公司 | Rolling process for controlling actual grain size of low-carbon deep-drawing steel |
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| CN113714293A (en) * | 2020-05-26 | 2021-11-30 | 上海梅山钢铁股份有限公司 | Coiling method for producing ultrathin strip steel by ferrite based on hot continuous rolling mill |
| CN112090958A (en) * | 2020-08-03 | 2020-12-18 | 大冶特殊钢有限公司 | Rolling process for controlling actual grain size of low-carbon deep-drawing steel |
| CN112226672A (en) * | 2020-09-07 | 2021-01-15 | 日照钢铁控股集团有限公司 | Method for producing anti-aging low-carbon steel by adopting ferrite rolling process |
| CN113122690A (en) * | 2021-04-16 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Low-delta r-value micro-carbon steel cold-rolled steel plate and preparation method thereof |
| CN113122690B (en) * | 2021-04-16 | 2022-03-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Low-delta r-value micro-carbon steel cold-rolled steel plate and preparation method thereof |
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| CN115505817A (en) * | 2021-06-07 | 2022-12-23 | 上海梅山钢铁股份有限公司 | Production method of low-thickness low-carbon B-containing hot rolled steel plate |
| CN114798736A (en) * | 2022-04-27 | 2022-07-29 | 日照宝华新材料有限公司 | Method for producing thin-specification patterned steel plate by thin slab continuous casting and rolling process |
| CN115382913A (en) * | 2022-09-21 | 2022-11-25 | 福建鼎盛钢铁有限公司 | Method for producing hot-rolled strip steel with thickness of 0.8mm based on full endless thin slab continuous casting and rolling |
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