CN106756508A - The method that Thin Specs REH380LA steel is produced based on ESP bar strip continuous casting and rolling flow paths - Google Patents
The method that Thin Specs REH380LA steel is produced based on ESP bar strip continuous casting and rolling flow paths Download PDFInfo
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- CN106756508A CN106756508A CN201611263615.9A CN201611263615A CN106756508A CN 106756508 A CN106756508 A CN 106756508A CN 201611263615 A CN201611263615 A CN 201611263615A CN 106756508 A CN106756508 A CN 106756508A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 106
- 239000010959 steel Substances 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000005096 rolling process Methods 0.000 title claims abstract description 62
- 238000009749 continuous casting Methods 0.000 title claims abstract description 50
- 239000002994 raw material Substances 0.000 claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 claims abstract description 25
- 238000003723 Smelting Methods 0.000 claims abstract description 19
- 238000007670 refining Methods 0.000 claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 18
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 241001062472 Stokellia anisodon Species 0.000 claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 16
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000005098 hot rolling Methods 0.000 claims description 4
- -1 wherein Substances 0.000 abstract description 14
- 238000005097 cold rolling Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 18
- 239000000047 product Substances 0.000 description 18
- 239000010936 titanium Substances 0.000 description 18
- 230000006698 induction Effects 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 239000002253 acid Substances 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 11
- 239000012535 impurity Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 239000013078 crystal Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002507 cathodic stripping potentiometry Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 241000707825 Argyrosomus regius Species 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
-
- 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
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Metal Rolling (AREA)
Abstract
The present invention provides a kind of method that Thin Specs REH380LA steel is produced based on ESP bar strip continuous casting and rolling flow paths, including selection raw material, wherein, raw material include by mass percentage：0.04~0.10% C, 0.15~0.50% Si, 0.50~1.10% Mn, 0.008~0.04% Alt, 0.008~0.04% Ti, 0.010~0.030% Nb, 0.0010~0.0030% S, 0.0080~0.0130% P ,≤0.0035% N, remaining is ferro element；Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be refined from RH stoves；Wherein, in ESP producing lines, roughing outlet temperature is 920~980 DEG C, and the temperature of finish rolling outlet is 800~870 DEG C；Hot-strip is cooled to 530~680 DEG C, and storage is batched subsequently into coiling machine.Using the present invention, solve to there are problems that in traditional production technique to need it is subsequently cold rolling and.
Description
Technical field
The present invention relates to metal material processing and field shaping technique, more specifically, it is related to a kind of based on ESP sheet billets
The method that continuous casting and rolling flow produces Thin Specs REH380LA steel.
Background technology
In recent years, persistently dropping with steel market, steel is constantly in meagre profit or without sharp state, forces steel producer
Have to inquire into Jiang Benzhi roads, and the domestic attention degree at present to environmental protection is further strengthened, environmental requirement is again unprecedented strict, because
This inquires into drop, and originally process for producing steel and iron of environmental protection has become the road of very necessary existence again.
Make full use of ESP development and application new products to meet national general planning and sector planning, meet national modulation wound phase
Policy Conditions are closed, disclosure satisfy that technique modernization, equipment enlarging, production intensification, resource and energy circulationization, energy consumption are minimum
Change, the optimized high start developing goal of economic benefit, for propulsion steel industry energy-saving and emission-reduction and technological progress, promote enterprise
Transition and upgrade, scientific and technical innovation and product restructuring, all tool are of great significance.
Microalloy high strength steel is mainly used in the industries such as communications and transportation, vehicle manufacture, engineering machinery.Thin Specs high-strength steel makes
With can not only make the enterprise of manufacture vehicle part reduces steel usage amount and production cost, while reducing user's oil consumption cost.When
Before, world energy sources, resource and environmental protection problem are increasingly severe, ferrous materials realize high intensity, lightweight and it is energy-saving into
Be in the urgent need to.
To solve the above problems, the present invention proposes a kind of based on ESP bar strip continuous casting and rolling flow paths production Thin Specs
The method of REH380LA steel.
The content of the invention
In view of the above problems, thin rule are produced based on ESP bar strip continuous casting and rolling flow paths it is an object of the invention to provide one kind
The method of lattice REH380LA steel, with solve to there are problems that in traditional production technique to need it is follow-up cold rolling and, satisfaction
Properties and the dimension precision requirements such as REH380LA automobile steels intensity, elongation percentage.
The present invention provides a kind of method that Thin Specs REH380LA steel is produced based on ESP bar strip continuous casting and rolling flow paths, bag
Include：
Selection raw material, wherein, raw material include by mass percentage：0.04~0.10% C, 0.15~0.50%
Si, 0.50~1.10% Mn, 0.008~0.04% Alt, 0.008~0.04% Ti, 0.010~0.030% Nb,
0.0010~0.0030% S, 0.0080~0.0130% P ,≤0.0035% N, remaining is ferro element；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be refined from RH stoves；Wherein, produced in ESP
In line, roughing outlet temperature is 920~980 DEG C, and the temperature of finish rolling outlet is 800~870 DEG C；
Hot-strip is cooled to 530~680 DEG C, and storage is batched subsequently into coiling machine.
Furthermore it is preferred that scheme be, in ESP producing lines, 3.5~6.0m/min of pulling speed of continuous casting, slab thickness 90mm~
110mm。
Furthermore it is preferred that structure be that in ESP producing lines, strand directly carries out hot rolling, wherein, roughing inlet temperature be 950
~1050 DEG C, entry temperature at finishing is 1100~1200 DEG C, and the temperature of sensing heating outlet is 1100~1180 DEG C.
Furthermore it is preferred that scheme be that the thickness of hot-strip is 1.0~2.5mm.
Furthermore it is preferred that scheme be that the yield strength of the REH380LA steel of production is 420~470MPa, tensile strength is
490~530MPa, elongation percentage is 23~29%.
Knowable to technical scheme above, what the present invention was provided produces Thin Specs based on ESP bar strip continuous casting and rolling flow paths
The method of REH380LA steel, Thin Specs REH380LA microalloying vapour is produced using ESP completely without head bar strip continuous casting and rolling flow path
Bassinet structure steel, realizes " with hot Dai Leng " production technology of vehicle structure steel, it is not necessary to follow-up cold rolling and annealing, substantially reduces
Cost, realizes the lightweight demand of vehicle structure steel " with Bao Daihou ".
In order to realize above-mentioned and related purpose, one or more aspects of the invention include the spy that will be explained in below
Levy.Following explanation and accompanying drawing is described in detail some illustrative aspects of the invention.However, these aspects are indicated only
It is some modes in the various modes for can be used principle of the invention.Additionally, it is contemplated that including all these aspects with
And their equivalent.
Brief description of the drawings
By reference to the content of the explanation below in conjunction with accompanying drawing, and it is more fully understood from to of the invention, the present invention
Other purposes and result will be more apparent and should be readily appreciated that.In the accompanying drawings：
Fig. 1 is to produce Thin Specs REH380LA steel based on ESP bar strip continuous casting and rolling flow paths according to the embodiment of the present invention
Method flow schematic diagram；
Fig. 2 is that the structure of the metallographic structure of the REH380LA steel of the 1.0mm thickness of the generation according to the embodiment of the present invention is shown
It is intended to.
Identical label indicates similar or corresponding feature or function in all of the figs.
Specific embodiment
In the following description, for purposes of illustration, in order to provide the comprehensive understanding to one or more embodiments, explain
Many details are stated.It may be evident, however, that these embodiments can also be realized in the case of without these details.
For foregoing proposition can solve the problem that in traditional production technique there are problems that needing it is follow-up cold rolling and, this hair
It is bright propose it is a kind of based on ESP bar strip continuous casting and rolling flow paths produce Thin Specs REH380LA steel method, using ESP techniques from
Continuous casting directly generates various thickness specification strip REH380LA steel, can solve the problem that above mentioned problem, and disclosure satisfy that Thin Specs band
The generation technique demand of steel, additionally it is possible to energy-conserving and environment-protective reduction production cost.
Wherein, ESP (Endless Strip Production, strip production without a head) producing line, is newly-built new of AVM hereinafter enlightening
Generation sheet billet continuous casting and rolling production line, once being cast due to it can produce a whole piece steel band, the no any cutting head cutting tail in centre,
Thus have the advantages that Total continuity strip is produced, wall scroll continuous casting line has the big band broadband of outstanding production capacity, large-scale production
The features such as steel and quality strip steel, the conversion cost from molten steel to hot rolled coil are low, production-line technique arrangement is the compactest.
Specific embodiment of the invention is described in detail below with reference to accompanying drawing.
In order to illustrate the side that Thin Specs REH380LA steel is produced based on ESP bar strip continuous casting and rolling flow paths of present invention offer
Method, Fig. 1 shows according to embodiments of the present invention based on ESP bar strip continuous casting and rolling flow paths production Thin Specs REH380LA steel
Method flow.
As shown in figure 1, the present invention provide based on ESP bar strip continuous casting and rolling flow paths production Thin Specs REH380LA steel
Method includes：
S110：Selection raw material, wherein, raw material include by mass percentage：0.04~0.10% C, 0.15~
0.50% Si, 0.50~1.10% Mn, 0.008~0.04% Alt, 0.008~0.04% Ti, 0.010~
0.030% Nb, 0.0010~0.0030% S, 0.0080~0.0130% P ,≤0.0035% N, remaining is iron unit
Element；
S120：Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
S130：The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be refined from RH stoves；Wherein, exist
In ESP producing lines, roughing outlet temperature is 920~980 DEG C, and the temperature of finish rolling outlet is 800~870 DEG C；
S140：Hot-strip is cooled to 530~680 DEG C, and storage is batched subsequently into coiling machine.
Above-mentioned steps are the specific method using ESP Process Production REH380LA steel, present invention production Thin Specs
The method of REH380LA steel specifically includes smelting procedure, completely without head ESP CSPs operation, refrigerating work procedure, fourth hand
Sequence, i.e.,：Mixed iron blast → molten iron pretreatment → BOF (converter smelting) → LF (refining of LF stoves) → RH (refining of RH stoves) → ESP continuous castings
Tandem rolling → section cooling → batch → pickling → finished product.Wherein, strand is rolled through three passage roughing, base product in the middle of roughing
Sensed stove adds, and base is rolled into different-thickness hot-strip through 5 passage finish rolling in the middle of sensed heating, and steel band is through laminar flow section air cooling
It is coiled subsequently into coiling machine to uniform temperature.
The yield strength of the REH380LA steel of REH380LA steel yield strength production prepared by the present invention for 420~
470MPa, tensile strength is 490~530MPa, and elongation percentage shows generation according to embodiments of the present invention for 23~29%, Fig. 2
1.0mm thickness REH380LA steel matrix structure.Metallographic structure is ferrite and pearlite.Using this technique energy
Ultra-thin strip is enough produced, is capable of achieving with Bao Daihou, with hot Dai Leng, with economic results in society very high.
It should be noted that ESP is completely without head casting and rolling process, casting blank solidification speed is fast, as-cast structure is more uniform, second
Phase precipitation particles is tiny；Strand realizes direct casting without soaking stove heat, and microalloy element solid solution is more, precipitation strength contribution
Greatly；Thickness of strand 90mm~110mm under the technique, hot rolling product thickness 1.0mm~2.5mm, product thickness deflection are big, into
Product tissue crystal grain is tiny；Conticaster 3.5~6.0m/min of pulling rate, the sensed heating stove heat of middle base before finishing mill, can
Ensure 1100~1200 DEG C of entry temperature at finishing, production without a head in addition does not need threading, rapid cooling after finish rolling, can stable rolling production
Thin Specs high-strength steel, the elongated thickness of hot rolled coil is uniform, stable performance.
In step S110 of the invention, in the raw material selection of generation REH380LA steel, the mass percent of C is
0.04~0.10%, C are the important element for improving the strength of materials, while can form microalloy with the effect such as Ti, Nb in steel being carbonized
Thing, plays a part of to suppress austenite crystal and precipitation strength, and rational composition design can ensure the good yield strength of material
And tensile strength.Therefore C content control in the present invention is 0.04%~0.10%.
Ratios of the Si in raw material has preferable deoxidation effect for 0.15~0.50%, Si, adds in steelmaking process
Silicon can effectively suppress the precipitation of carbide, but the too high welding performance for then reducing steel as reducing agent and deoxidier.Therefore at this
The control of Si contents is 0.15%~0.50% in invention.
Mn shared in raw material ratio can strongly postpone perlitic transformation for 0.50%~1.10%, Mn, be conducive to
Bainite is formed, but the too high resistance to corrosion that may be such that grain coarsening, weaken steel, reduces welding performance.And Mn contents increase
Plus, martensite quenching degree can be improved, it is unfavorable for elongation percentage.Therefore Mn contents control in the present invention is 0.50%~1.10%.
Alt shared in raw material ratio is 0.008%~0.04%, and aluminium is deoxidant element in strong steel, is improved
The cleanliness factor of molten steel, prevents titanium to be oxidized loss.Therefore Alt contents control in the present invention is 0.008%~0.040%.
Ti shared in raw material ratio is 0.008%~0.040%, and titanium is a kind of strong carbide and nitride
Formation element, separates out in high temperature course of hot rolling, can effectively suppress growing up for austenite crystal, plays a part of crystal grain thinning,
TiN, TiC precipitate may also operate as the effect of precipitation strength.Therefore Ti contents control in the present invention 0.008%~
0.040%.
Nb shared in raw material ratio is 0.010%~0.030%, Nb to crystal grain refinement, transformation behavior, austenite
Middle C enrichments play remarkable effect.Static and dynamic recrystallization and austenite are to iron in the Nb delay thermal deformation process of solid solution condition
The phase transformation of ferritic, is to be carried in Unhydrated cement rolling so as to expand the temperature range between dynamic recrystallization final temperature and Ac3
Facility is supplied.Nb and C and N combines to form tiny carbonitride can also postpone recrystallization, prevent ferrite crystal grain from growing up, so that
With strong refined crystalline strengthening effect and stronger precipitating reinforcing effect.Therefore Nb contents control in the present invention 0.010%~
0.030%.
In the step s 120, converter, LF stoves is carried out according to the composition of above-mentioned (step S110) to smelt and the refining of RH stoves.
That is, molten iron obtains the molten steel of required composition by the refining of LF stoves again after converter smelting.
In step s 130, in ESP producing lines, the temperature that strand enters roughing entrance is 950~1050 DEG C, and middle base exists
Initially entered before into mm finishing mill unit in induction heater, (sensing heating outlet temperature is 1100~1180 DEG C to IH, is added from sensing
Hot stove out enters mm finishing mill unit, and the temperature of finish rolling outlet is not less than 800 DEG C, also, in ESP producing lines, according to reality
Demand, sets different parameters in generation equipment, so as to generate the REH380LA steel of 1.0~2.5mm not equal thickness.
In an embodiment of the present invention, between the thickness and its yield strength, tensile strength of the REH380LA steel of generation into
Inverse ratio, if the thickness of the REH380LA steel of generation is big, then its yield strength and tensile strength can reduce, if generation is low
The thickness of REH380LA steel is small, then its yield strength and tensile strength can increase.
, wherein it is desired to explanation, IH is sensing heating outlet temperature, after induction heater is cut positioned at rotating hub, finish rolling
Position before machine, the effect of sensing heating is heating strip, it is ensured that final rolling temperature, it may also be said to be the temperature of base in the middle of regulation
Degree, depending on IH temperature is according to strip finish rolling requirement and consideration to strip steel surface quality, final rolling temperature can be caused not less than a certain temperature
Close, the energy is then wasted higher than a certain temperature.
Wherein, in ESP producing lines, the molten steel for smelting out from LF stoves enters conticaster, with the pulling rate of 3.5~6.0m/min
Poured, being directly entered 3 frame roughing mills from conticaster strand out is made middle base, then by rocking shears, by strand
Head wedge-shaped segment is segmented and is cut away, and then into piler, (effect of piler is equipment to break down below to strand
When, can be offline at this piler).Directly pass through during normal rolling, then in the middle of base through rotary hub type flying shear crop end, then
1100~1180 DEG C are heated into induction heater, mm finishing mill unit is subsequently entered, hot-strip is out generated from mm finishing mill unit.
Storage is batched after cooling down twice from the hot-strip of mm finishing mill unit generation.
According to the method for above-mentioned generation REH380LA steel, the present invention is further described according to examples below.
Embodiment 1
Selection raw material, wherein, raw material include by mass percentage：0.045% C, 0.21% Si, 0.80%
Mn, 0.012% P, 0.0020% S, 0.028% Alt, 0.013% Ti, 0.020% Nb, 0.0025% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 18 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.6m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 1020 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
To be controlled at 1140 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 850 DEG C；
By steel band through section cooling, 630 DEG C are cooled to using leading portion refrigerating mode, are put in storage in rolls subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 1：
Table 1
Embodiment 2
Selection raw material, wherein, raw material include by mass percentage：0.048% C, 0.20% Si, 0.79%
Mn, 0.010% P, 0.0020% S, 0.028% Alt, 0.012% Ti, 0.019% Nb, 0.0028% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 20 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.6m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 1000 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
To be controlled at 1140 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.1mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 850 DEG C；
By steel band through section cooling, 630 DEG C are cooled to using leading portion refrigerating mode, are put in storage in rolls subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 2：
Table 2
Embodiment 3
Selection raw material, wherein, raw material include by mass percentage：0.046% C, 0.20% Si, 0.81%
Mn, 0.011% P, 0.0022% S, 0.030% Alt, 0.012% Ti, 0.020% Nb, 0.0025% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 18 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.5m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 980 DEG C of roughing inlet temperature, 960 DEG C of roughing outlet temperature；
To be controlled at 1150 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.2mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 840 DEG C；
By steel band through section cooling, 620 DEG C are cooled to using leading portion refrigerating mode, are put in storage in rolls subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 3：
Table 3
Embodiment 4
Selection raw material, wherein, raw material include by mass percentage：0.051% C, 0.18% Si, 0.89%
Mn, 0.011% P, 0.001% S, 0.030% Alt, 0.014% Ti, 0.020% Nb, 0.0025% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
20 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.5m/min, slab thickness 95mm；
Strand is rolled through three passage roughing, 990 DEG C of roughing inlet temperature, 960 DEG C of roughing outlet temperature；
To be controlled at 1150 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.25mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
System is at 840 DEG C；
Steel band is air cooled to 620 DEG C through laminar flow section, it is coiled subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 4：
Table 4
Embodiment 5
Selection raw material, wherein, raw material include by mass percentage：0.051% C, 0.22% Si, 0.88%
Mn, 0.010% P, 0.0020% S, 0.028% Alt, 0.015% Ti, 0.026% Nb, 0.0035% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.4m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 980 DEG C of roughing inlet temperature, 960 DEG C of roughing outlet temperature；
To be controlled at 1140 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 830 DEG C；
Steel band is air cooled to 600 DEG C through laminar flow section, it is coiled subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 5：
Table 5
Embodiment 6
Selection raw material, wherein, raw material include by mass percentage：0.046% C, 0.23% Si, 0.82%
Mn, 0.012% P, 0.0020% S, 0.028% Alt, 0.013% Ti, 0.020% Nb, 0.0028% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 20 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.4m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 980 DEG C of roughing inlet temperature, 960 DEG C of roughing outlet temperature；
To be controlled at 1150 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.30mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
System is at 830 DEG C；
Steel band is air cooled to 610 DEG C through laminar flow section, it is coiled subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 6：
Table 6
Embodiment 7
Selection raw material, wherein, raw material include by mass percentage：0.051% C, 0.20% Si, 0.90%
Mn, 0.010% P, 0.0020% S, 0.030% Alt, 0.015% Ti, 0.025% Nb, 0.0034% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 24 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.4m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 980 DEG C of roughing inlet temperature, 960 DEG C of roughing outlet temperature；
To be controlled at 1140 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 830 DEG C；
Steel band is air cooled to 600 DEG C through laminar flow section, it is coiled subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 7：
Table 7
Embodiment 8
Selection raw material, wherein, raw material include by mass percentage：0.050% C, 0.23% Si, 0.91%
Mn, 0.011% P, 0.0010% S, 0.028% Alt, 0.015% Ti, 0.026% Nb, 0.0033% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 25 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.3m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 970 DEG C of roughing inlet temperature, 940 DEG C of roughing outlet temperature；
To be controlled at 1150 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.8mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 830 DEG C；
Steel band is air cooled to 590 DEG C through laminar flow section, it is coiled subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 8：
Table 8
Embodiment 9
Selection raw material, wherein, raw material include by mass percentage：0.04% C, 0.15% Si, 0.81%
Mn, 0.010% P, 0.0022% S, 0.030% Alt, 0.012% Ti, 0.010% Nb, 0.0035% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 6.0m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 950 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
To be controlled at 1180 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 2.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 800 DEG C；
Steel band is air cooled to 530 DEG C through laminar flow section, it is coiled subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 9：
Table 9
Embodiment 10
Selection raw material, wherein, raw material include by mass percentage：0.10% C, 0.50% Si, 0.50%
Mn, 0.013% P, 0.003% S, 0.040% Alt, 0.008% Ti, 0.030% Nb, 0.0025% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 3.5m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 1050 DEG C of roughing inlet temperature, 920 DEG C of roughing outlet temperature；
To be controlled at 1100 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 2.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 800 DEG C；
Steel band is air cooled to 680 DEG C through laminar flow section, it is coiled subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 10：
Table 10
Embodiment 11
Selection raw material, wherein, raw material include by mass percentage：0.050% C, 0.23% Si, 1.10%
Mn, 0.008% P, 0.0010% S, 0.008% Alt, 0.04% Ti, 0.026% Nb, 0.0033% N, its
It is remaining for ferro element and inevitable impurity；
Raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
Through LF, RH refine molten steel institute by ESP producing lines continuous casting, roughing, finish rolling, section cooling, batch, acid cleaning process give birth to
Produce the hot-strip of different-thickness；
Wherein, in ESP producing lines, 25 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.3m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 970 DEG C of roughing inlet temperature, 940 DEG C of roughing outlet temperature；
To be controlled at 1150 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 2.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 870 DEG C；
Steel band is air cooled to 590 DEG C through laminar flow section, it is coiled subsequently into coiling machine.
The performance of the REH380LA steel of generation is as shown in table 11：
Table 11
It should be noted that floating of the REH380LA steel of above-described embodiment generation on thickness is very small can ignore not
Meter, yield strength and tensile strength have fluctuating for 30MPa, illustrate hereby in the present invention.Wherein, REH380LA steel
Specification be 1.0mm × 1250mm~2.5mm × 1250mm；REH380LA steel as shown in table 1 is drawn through above-described embodiment
Yield strength, tensile strength and elongation percentage.
The thin based on the production of ESP bar strip continuous casting and rolling flow paths of present invention offer can be seen that by above-mentioned implementation method
The method of specification REH380LA steel, Thin Specs REH380LA microalloys are produced using ESP completely without head bar strip continuous casting and rolling flow path
Change vehicle structure steel, realize " with hot Dai Leng " production technology of vehicle structure steel, it is not necessary to follow-up cold rolling and annealing, significantly
Cost is reduced, the lightweight demand of vehicle structure steel " with Bao Daihou " is realized.
Described in an illustrative manner above with reference to accompanying drawing according to proposed by the present invention based on ESP CSP streams
The method that journey produces Thin Specs REH380LA steel.It will be understood by those skilled in the art, however, that being proposed for the invention described above
Based on ESP bar strip continuous casting and rolling flow paths produce Thin Specs REH380LA steel method, can also not depart from the present invention
Various improvement are made on the basis of appearance.Therefore, protection scope of the present invention should be determined by the content of appending claims.
Claims (5)
1. it is a kind of based on ESP bar strip continuous casting and rolling flow paths produce Thin Specs REH380LA steel method, it is characterised in that bag
Include：
Selection raw material, wherein, the raw material include by mass percentage：0.04~0.10% C, 0.15~0.50%
Si, 0.50~1.10% Mn, 0.008~0.04% Alt, 0.008~0.04% Ti, 0.010~0.030% Nb,
0.0010~0.0030% S, 0.0080~0.0130% P ,≤0.0035% N, remaining is ferro element；
The raw material are carried out converter smelting, LF stoves successively to smelt and the refining of RH stoves；
The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be refined from the RH stoves；Wherein, described
In ESP producing lines, roughing outlet temperature is 920~980 DEG C, and the temperature of finish rolling outlet is 800~870 DEG C；
The hot-strip is cooled to 530~680 DEG C, and storage is batched subsequently into coiling machine.
2. it is as claimed in claim 1 to be based on the method that ESP bar strip continuous casting and rolling flow paths produce Thin Specs REH380LA steel, its
It is characterised by,
In the ESP producing lines, 3.5~6.0m/min of pulling speed of continuous casting, slab thickness 90mm~110mm.
3. it is as claimed in claim 1 to be based on the method that ESP bar strip continuous casting and rolling flow paths produce Thin Specs REH380LA steel, its
It is characterised by,
In the ESP producing lines, strand directly carries out hot rolling, wherein, roughing inlet temperature is 950~1050 DEG C, finish rolling entrance
Temperature is 1100~1200 DEG C, and the temperature of sensing heating outlet is 1100~1180 DEG C.
4. it is as claimed in claim 1 to be based on the method that ESP bar strip continuous casting and rolling flow paths produce Thin Specs REH380LA steel, its
It is characterised by,
The thickness of the hot-strip is 1.0~2.5mm.
5. it is as claimed in claim 1 to be based on the method that ESP bar strip continuous casting and rolling flow paths produce Thin Specs REH380LA steel, its
It is characterised by,
The yield strength of the REH380LA steel of production is 420~470MPa, and tensile strength is 490~530MPa, and elongation percentage is 23
~29%.
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