CN106834887A - The method that Thin Specs RE510L steel is produced based on ESP bar strip continuous casting and rolling flow paths - Google Patents
The method that Thin Specs RE510L steel is produced based on ESP bar strip continuous casting and rolling flow paths Download PDFInfo
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- CN106834887A CN106834887A CN201611263595.5A CN201611263595A CN106834887A CN 106834887 A CN106834887 A CN 106834887A CN 201611263595 A CN201611263595 A CN 201611263595A CN 106834887 A CN106834887 A CN 106834887A
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- 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
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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
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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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- 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
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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Abstract
The present invention provides a kind of method that Thin Specs RE510L 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：0.03~0.07% C, 0.10~0.40% Si, 0.90~1.40% Mn, 0.02~0.04% Als, 0.008~0.020% Ti, 0.01~0.03% Nb ,≤0.0030% S ,≤0.015% P ,≤0.004% N, remaining is ferro element；Raw material are carried out the refining of converter smelting, LF stoves and RH stoves successively；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；Using the cooling hot-rolled strip of segmented mode before section cooling, 550~620 DEG C are cooled to, it is coiled strip steel to be batched subsequently into coiling machine, after coiled strip steel slow cooling, smooth coiled storage are carried out using 1%~2.0% smooth amount.Using the present invention, traditional hot rolling high cost is solved, the problems such as energy consumption is big.
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 RE510L 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.
Be the bearing capacity for improving automobile with the development of auto industry, extension automotive service life and energy-conservation, section material with
And safety traffic etc. require, with high-strength steel sheet produce automotive frame, it has also become development trend.High-strength vehicle crossbeam steel is not
But will have intensity higher, plasticity, toughness, good fatigue properties and processability, while also require that steel degree of purity compared with
High, inclusion balling degree is high, microscopic structure is excellent.
At present, domestic and international Thin Specs (thickness h ＜ 2.0mm) beam steel mainly using hot-rolled coil pickling, it is cold rolling, move back
The production technology of fire, regarding to the issue above, the present invention proposes a kind of based on ESP bar strip continuous casting and rolling flow paths production Thin Specs
The method of RE510L 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 RE510L steel, to solve traditional hot rolling high cost, the problems such as energy consumption is big, reaches energy-conserving and environment-protective and reduces cost
Purpose.
The present invention provides a kind of method that Thin Specs RE510L 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：0.03~0.07% C, 0.10~0.40%
Si, 0.90~1.40% Mn, 0.02~0.04% Als, 0.008~0.020% Ti, 0.01~0.03% Nb ,≤
0.0030% S ,≤0.015% P ,≤0.004% N, remaining is ferro element；
Raw material are carried out the refining of converter smelting, LF stoves and RH stoves successively；
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；
Using the cooling hot-rolled strip of segmented mode before section cooling, 550~620 DEG C are cooled to, are batched subsequently into coiling machine
It is coiled strip steel, after coiled strip steel slow cooling, smooth coiled storage is carried out using 1%~2.0% smooth amount.
Furthermore it is preferred that scheme be, in ESP producing lines, 5.0~6.0m/min of pulling speed of continuous casting, slab thickness 90~
110mm。
Furthermore it is preferred that scheme be, in ESP producing lines, roughing inlet temperature be >=950 DEG C, sensing heating outlet temperature
Spend is 1050~1170 DEG C.
Furthermore it is preferred that scheme be that the thickness of hot-strip is 1.0~3.5mm.
Furthermore it is preferred that scheme be that the metallographic structure of the RE510L steel of production is ferrite and pearlite, wherein,
The yield strength of RE510L steel is >=420MPa, and tensile strength is >=540MP, and elongation percentage is >=28%.
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 RE510L steel, using ESP completely without head continuous casting and rolling technique of sheet bar low cost production hot rolling Thin Specs RE510L automobiles
Crossbeam steel, the technological process of production is short, can solve the problem that traditional hot rolling high cost, the problems such as energy consumption is big, and the technological process of production is short, category
In low energy consumption green manufacturing process regime, the hot-rolled product stable performance produced, plate shape are good, dimensional tolerance is small, hot rolling
State can reach 1.0mm Ultra-thin bands, can reduce cold rolling process rolling pass, reach " with Bao Daihou, with hot Dai Leng " section
The purpose that can be lowered consumption.
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 RE510L 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 the structural representation of the matrix of the RE510L steel according to the embodiment of the present invention.
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.
The problems such as traditional hot rolling cost high energy consumption for foregoing proposition is big, the present invention proposes a kind of based on ESP thin plates
The method that continuous-casting tandem-rolling flow produces Thin Specs RE510L steel, various thickness specifications are directly generated using ESP techniques from continuous casting
Strip RE510L steel, can reduce production cost, realize with Bao Daihou, with economic results in society very high.
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 RE510L steel is produced based on ESP bar strip continuous casting and rolling flow paths of present invention offer
Method, Fig. 1 shows the side that Thin Specs RE510L steel is produced based on ESP bar strip continuous casting and rolling flow paths according to embodiments of the present invention
Method flow.
As shown in figure 1, the side that Thin Specs RE510L steel is produced based on ESP bar strip continuous casting and rolling flow paths that the present invention is provided
Method includes：
S110：Selection raw material, wherein, raw material include by mass percentage：0.03~0.07% C, 0.10~
0.40% Si, 0.90~1.40% Mn, 0.02~0.04% Als, 0.008~0.020% Ti, 0.01~0.03%
Nb ,≤0.0030% S ,≤0.015% P ,≤0.004% N, remaining is ferro 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：Using the cooling hot-rolled strip of segmented mode before section cooling, 550~620 DEG C are cooled to, subsequently into coiling machine
It is coiled strip steel to batch, and after coiled strip steel slow cooling, smooth coiled storage is carried out using 1%~2.0% smooth amount.
Above-mentioned steps are the specific method using ESP Process Production RE510L steel, present invention production Thin Specs RE510L steel
Method specifically include smelting procedure, completely without head ESP CSPs operation, refrigerating work procedure, coiling process, i.e.,：Mixed iron
Stove → molten iron pretreatment → BOF (converter smelting) → LF → RH → ESP continuous casting and rollings → section cooling → batch → slow cooling → flat
Whole → finished product.RE510L steel yield strength >=420MPa prepared by the present invention, tensile strength is >=540MP, elongation percentage for >=
28% metallographic structure is ferrite and pearlite, and Fig. 2 shows the matrix of RE510L steel according to embodiments of the present invention
Structure.The present invention using completely without head ESP continuous casting and rolling technique of sheet bar can efficiently, low cost produce RE510L steel, product has
Performance, dimensionally stable and the thin advantage of specification.
In step S110 of the invention, in the raw material selection for generating low RE510L steel, contents of the C in raw material
For：0.03~0.07%, research shows, as w (C) >=0.07%, steel plate is directly changed into during roller repairing by γ
The F of various forms, without there are two phase in version of the γ to F+Fe3C.As w (C)≤0.07%, it is more easy to obtain AF, and AF has
Splendid toughness and splendid solderability.Therefore, C content is controlled 0.03%~0.07% in the present invention.
Contents of the Si in raw material be：In addition to the intensity that can improve steel, Si can improve horse for 0.10~0.40%, Si
The stability of retained austenite between family name's body lath, while the temperature range that the Low-Temperature Temper Brittleness for also improving steel occurs, weighs very much
What is wanted is that silicon can prevent Carbon diffusion, delays the precipitation and accumulation of cementite, improves the stability of martensite, therefore can be effective
The anti-temper softening ability for improving steel allows developed steel to be tempered at a higher temperature, is conducive to raising Heat-Treatment of Steel to fit
Should be able to power.Therefore Si contents control in the present invention is 0.10%~0.40%.
Contents of the Mn in raw material be：The maximum effect of 0.9%~1.4%, Mn is to improve the quenching degree of steel, while
It is important solution strengthening element.Manganese is carbide former, can also be existed with solid solution condition, also with refinement pearlite group
The effect knitted, thus the intensity and hardness of ferrite austenite can be improved.Mn also has one to the anti-temper softening ability for improving steel
Fixed effect, but Mn contents it is higher when have the tendency of coarsened grain and increase temper brittleness, bring difficulty to processing.Therefore in this hair
Bright middle Mn contents control is 0.9%~1.4%.
Contents of the Nb in raw material be：0.010%~0.030%, niobium plays crystal grain refinement and precipitation enhancement, from
And obtain the mechanical property Proper Match of high intensity and high tenacity；Recrystallization temperature is improved, high temperature rolling is realized.Therefore in the present invention
Middle Nb contents control is 0.010%~0.030%.
Contents of the Ti in raw material be：0.008%~0.020%, Ti are a kind of strong carbide and nitride shape
Into element, separated out in high temperature course of hot rolling, can effectively suppress growing up for austenite crystal, play a part of crystal grain thinning,
TiN, TiC precipitate may also operate as the effect of precipitation strength, thus Ti contents control in the present invention 0.008%~
0.020%.
In the step s 120, converter, LF stoves, the smelting of RH stoves are carried out according to the composition of above-mentioned (step S110).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 DEG C, and middle base is entering
Initially entered before mm finishing mill unit in induction heater, (sensing heating outlet temperature is 1050~1170 DEG C to IH, from induction heater
Out enter mm finishing mill unit, and the temperature of finish rolling outlet is not less than 820 DEG C, also, in ESP producing lines, according to the actual requirements,
Different parameters are set in generation equipment, so as to generate the RE510L steel of 1.0~3.5mm not equal thickness.
In an embodiment of the present invention, between the thickness and its yield strength, tensile strength of the RE510L steel of generation into anti-
Than if the thickness of the RE510L steel of generation is big, then its yield strength and tensile strength can reduce, if generation is low
The thickness of RE510L 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.
In ESP producing lines, the molten steel for smelting out from RH stoves enters conticaster, is carried out with the pulling rate of 5.0~6.0m/min
Casting, is directly entered 3 frame roughing mills and is made middle base, then by rocking shears, by strand head from conticaster strand out
Wedge-shaped segment is segmented and is cut away, then strand enter piler (effect of piler be when equipment below breaks down, can
With offline at this piler).Directly pass through during normal rolling, then in the middle of base through rotary hub type flying shear crop end, subsequently into
Induction heater is heated to 1050~1170 DEG C, subsequently enters mm finishing mill unit, and hot-strip is out generated from mm finishing mill unit.From essence
The hot-strip of crew grouping is rolled by batching storage after section cooling.
According to the method for above-mentioned generation RE510L steel, the present invention is further described according to following specific embodiment.
Embodiment 1
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → slow cooling → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.035Wt%；Si：0.15Wt%；Mn：1.05Wt%；Als：0.032Wt%；Nb：0.012Wt%；Ti：
0.013Wt%；S：0.0020Wt%；P：0.012Wt%；N：0.0032Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
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, 1050 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature.
To be controlled at 1120 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 through 5 passage finish rolling, exit temperature at finishing exists
850℃。
By steel band through section cooling, 630 DEG C are cooled to using leading portion refrigerating mode, are batched as coiled subsequently into coiling machine
Strip.
Smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 1：
Table 1
Embodiment 2
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → slow cooling → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.038Wt%；Si：0.18Wt%；Mn：1.08Wt%；Als：0.030Wt%；Nb：0.018Wt%；Ti:
0.013Wt%；S：0.0020Wt%；P：0.012Wt%；N：0.0035Wt%, balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions 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, 1050 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 1.2mm thickness hot-strips through 5 passage finish rolling, exit temperature at finishing exists
850℃。
By steel band through section cooling, 630 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine, will be slow
Cold rear hot rolling carries out smooth being taken into storehouse in rolls using 1% smooth amount
The performance of the RE510L steel of generation is as shown in table 2：
Table 2
Embodiment 3
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → slow cooling → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.040Wt%；Si：0.20Wt%；Mn：1.10Wt%；Als：0.032Wt%；Nb：0.020Wt%；Ti:
0.013Wt%；S：0.0025Wt%；P：0.012Wt%；N：0.0033Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
21 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, 1040 DEG C of roughing inlet temperature, 970 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 1.5mm 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 batched as coiled subsequently into coiling machine
Strip, smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 3：
Table 3
Embodiment 4
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → slow cooling → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.042Wt%；Si：0.22Wt%；Mn：1.10Wt%；Als：0.032Wt%；Nb：0.020Wt%；Ti:
0.014Wt%；S：0.0020Wt%；P：0.012Wt%；N：0.0035Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions 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, 1030 DEG C of roughing inlet temperature, 970 DEG C of roughing outlet temperature.
To be controlled at 1130 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 840 DEG C.
By steel band through section cooling, 620 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine, will be slow
Cold rear hot rolling carries out smooth being taken into storehouse in rolls using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 4：
Table 4
Embodiment 5
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → slow cooling → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.045Wt%；Si：0.23Wt%；Mn：1.12Wt%；Als：0.031Wt%；Nb：0.022Wt%；Ti:
0.013Wt%；S：0.0020Wt%；P：0.012Wt%；N：0.0030Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
22 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, 1020 DEG C of roughing inlet temperature, 960 DEG C of roughing outlet temperature.
To be controlled at 1130 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 830 DEG C.
By steel band through section cooling, 620 DEG C are cooled to using leading portion refrigerating mode, are batched as coiled subsequently into coiling machine
Strip.
Smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 5：
Table 5
Embodiment 6
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → slow cooling → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.052Wt%；Si：0.25Wt%；Mn：1.15Wt%；Als：0.031Wt%；Nb：0.022Wt%；Ti:
0.014Wt%；S：0.0020Wt%；P：0.012Wt%；N：0.0035Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
22 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, 1010 DEG C of roughing inlet temperature, 960 DEG C of roughing outlet temperature.
To be controlled at 1130 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 830 DEG C.
By steel band through section cooling, 620 DEG C are cooled to using leading portion refrigerating mode, are batched as coiled subsequently into coiling machine
Strip is coiled, and smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 6：
Table 6
Embodiment 7
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → slow cooling → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.051Wt%；Si：0.26Wt%；Mn：1.15Wt%；Als：0.030Wt%；Nb：0.023Wt%；Ti:
0.015Wt%；S：0.0020Wt%；P：0.012Wt%；N：0.0030Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
22 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, 1010 DEG C of roughing inlet temperature, 955 DEG C of roughing outlet temperature.
To be controlled at 1125 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 830 DEG C.
By steel band through section cooling, 615 DEG C are cooled to using leading portion refrigerating mode, are batched as coiled subsequently into coiling machine
Strip is coiled, and smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 7：
Table 7
Embodiment 8
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → slow cooling → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.052Wt%；Si：0.30Wt%；Mn：1.28Wt%；Als：0.032Wt%；Nb：0.028Wt%；Ti:
0.020Wt%；S：0.0020Wt%；P：0.012Wt%；N：0.0036Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
22 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.2m/min, slab thickness 95mm.
Strand is rolled through three passage roughing, 1000 DEG C of roughing inlet temperature, 950 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 3.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 820 DEG C.
By steel band through section cooling, 610 DEG C are cooled to using leading portion refrigerating mode, are batched as coiled subsequently into coiling machine
Strip is coiled, and smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 8：
Table 8
Embodiment 9：
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.065Wt%；Si：0.37Wt%；Mn：1.35Wt%；Als：0.032Wt%；Nb：0.030Wt%；Ti:
0.022Wt%；S：0.0020Wt%；P：0.012Wt%；N：0.0036Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
22 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.2m/min, slab thickness 95mm.
Strand is rolled through three passage roughing, 990 DEG C of roughing inlet temperature, 945 DEG C of roughing outlet temperature.
To be controlled at 1160 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 3.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 820 DEG C.
By steel band through section cooling, 610 DEG C are cooled to using leading portion refrigerating mode, are batched as coiled subsequently into coiling machine
Strip is coiled, and smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 9：
Table 9
Embodiment 10：
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.03Wt%；Si：0.11Wt%；Mn：1.40Wt%；Als：0.030Wt%；Nb：0.020Wt%；Ti:0.01Wt%；
S：0.0015Wt%；P：0.010Wt%；N：0.0025Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
22 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.0m/min, slab thickness 90mm.
Strand is rolled through three passage roughing, 950 DEG C of roughing inlet temperature, 920 DEG C of roughing outlet temperature.
To be controlled at 1050 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 3.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 800 DEG C.
By steel band through section cooling, 550 DEG C are cooled to using leading portion refrigerating mode, are batched as coiled subsequently into coiling machine
Strip is coiled, and smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 10：
Table 10
Embodiment 11：
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.068Wt%；Si：0.35Wt%；Mn：0.95Wt%；Als：0.028Wt%；Nb：0.010Wt%；Ti:
0.015Wt%；S：0.0023Wt%；P：0.011Wt%；N：0.0031Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
22 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 6.0m/min, slab thickness 110mm.
Strand is rolled through three passage roughing, 970 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature.
To be controlled at 1170 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.
By steel band through section cooling, 620 DEG C are cooled to using leading portion refrigerating mode, are batched as coiled subsequently into coiling machine
Strip is coiled, and smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 11：
Table 11
Embodiment 12：
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE510L steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → RH → ESP continuous casting and rollings → section cooling → batch → smooth → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining, RH refinings, molten steel composition control successively
It is C：0.07Wt%；Si：0.40Wt%；Mn：1.0Wt%；Als：0.025Wt%；Nb：0.015Wt%；Ti:0.025Wt%；
S：0.0018Wt%；P：0.009Wt%；N：0.0028Wt%.Balance of Fe.
LF, RH refining molten steel by ESP producing lines continuous casting, roughing, sensing heating, finish rolling, section cooling, batch, it is smooth
The hot-strip of technique productions different-thickness.
22 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.5m/min, slab thickness 100mm.
Strand is rolled through three passage roughing, 970 DEG C of roughing inlet temperature, 980 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 850 DEG C.
By steel band through section cooling, 600 DEG C are cooled to using leading portion refrigerating mode, are batched as coiled subsequently into coiling machine
Strip is coiled, and smooth coiled storage is carried out to the coiled strip steel after slow cooling using 1% smooth amount.
The performance of the RE510L steel of generation is as shown in table 12：
Table 12
It should be noted that floating of the RE510L 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.
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 RE510L steel, using ESP completely without head continuous casting and rolling technique of sheet bar low cost production hot rolling Thin Specs RE510L
Steel for automobile crossbeam, the technological process of production is short, can solve the problem that traditional hot rolling high cost, the problems such as energy consumption is big, the technological process of production
It is short, belong to low energy consumption green manufacturing process regime, the hot-rolled product stable performance produced, plate shape are good, dimensional tolerance is small,
Hot-rolled state can reach 1.0mm Ultra-thin bands, can reduce cold rolling process rolling pass, reach " with Bao Daihou, with hot generation
It is cold " energy-saving purpose.
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 RE510L steel.It will be understood by those skilled in the art, however, that proposed for the invention described above
The method that Thin Specs RE510L steel is produced based on ESP bar strip continuous casting and rolling flow paths, can also not depart from present invention
On the basis of make various improvement.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 RE510L steel method, it is characterised in that including：
Selection raw material, wherein, the raw material include by mass percentage：0.03~0.07% C, 0.10~0.40%
Si, 0.90~1.40% Mn, 0.02~0.04% Als, 0.008~0.020% Ti, 0.01~0.03% Nb ,≤
0.0030% S ,≤0.015% P ,≤0.004% N, remaining is ferro element；
The raw material are carried out the refining of converter smelting, LF stoves and RH stoves successively；
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 down using segmented mode before section cooling, 550~620 DEG C are cooled to, batched subsequently into coiling machine
It is coiled strip steel, after the coiled strip steel slow cooling, smooth coiled storage is carried out using 1%~2.0% smooth amount.
2. as claimed in claim 1 to be based on the method that ESP bar strip continuous casting and rolling flow paths produce Thin Specs RE510L steel, it is special
Levy and be,
In the ESP producing lines, 5.0~6.0m/min of pulling speed of continuous casting, 90~110mm of slab thickness.
3. as claimed in claim 1 to be based on the method that ESP bar strip continuous casting and rolling flow paths produce Thin Specs RE510L steel, it is special
Levy and be,
In the ESP producing lines, roughing inlet temperature is >=950 DEG C, and the temperature of sensing heating outlet is 1050~1170 DEG C.
4. as claimed in claim 1 to be based on the method that ESP bar strip continuous casting and rolling flow paths produce Thin Specs RE510L steel, it is special
Levy and be,
The thickness of the hot-strip is 1.0~3.5mm.
5. as claimed in claim 1 to be based on the method that ESP bar strip continuous casting and rolling flow paths produce Thin Specs RE510L steel, it is special
Levy and be,
The metallographic structure of the RE510L steel of production is ferrite and pearlite, wherein, the yield strength of the RE510L steel for >=
420MPa, tensile strength is >=540MP, and elongation percentage is >=28%.
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| CN107604256A (en) * | 2017-08-16 | 2018-01-19 | 北京科技大学 | A kind of preparation method of 700MPa levels automotive frame steel band |
| CN107723593A (en) * | 2017-09-30 | 2018-02-23 | 日照宝华新材料有限公司 | Based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling |
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| CN107723593A (en) * | 2017-09-30 | 2018-02-23 | 日照宝华新材料有限公司 | Based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling |
| CN107893187A (en) * | 2017-10-31 | 2018-04-10 | 日照钢铁控股集团有限公司 | Based on the method that low-alloy high-strength steel is produced completely without head bar strip continuous casting and rolling flow path |
| CN108796189A (en) * | 2018-04-26 | 2018-11-13 | 日照钢铁控股集团有限公司 | Based on the Thin Specs RE700MC steel and preparation method thereof prepared completely without head bar strip continuous casting and rolling flow path |
| CN112522566A (en) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | Thin-specification patterned steel plate/strip and manufacturing method thereof |
| CN111676419A (en) * | 2020-05-12 | 2020-09-18 | 首钢集团有限公司 | Method for preparing S355MC steel coil based on multi-mode sheet billet continuous casting and rolling production line and product thereof |
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