CN106834924B - The method for producing Thin Specs SAPH440 steel based on ESP bar strip continuous casting and rolling flow paths - Google Patents
The method for producing Thin Specs SAPH440 steel based on ESP bar strip continuous casting and rolling flow paths Download PDFInfo
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- CN106834924B CN106834924B CN201611261494.4A CN201611261494A CN106834924B CN 106834924 B CN106834924 B CN 106834924B CN 201611261494 A CN201611261494 A CN 201611261494A CN 106834924 B CN106834924 B CN 106834924B
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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
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
-
- 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
Abstract
The present invention provides a kind of method producing Thin Specs SAPH440 steel based on ESP bar strip continuous casting and rolling flow paths, including selection raw material, wherein raw material include by mass percentage：Select raw material, wherein raw material include by mass percentage：0.04~0.10% C, 0.15~0.45% Si, 1.00~1.50% Mn, 0.008~0.045% Alt ,≤0.0030% S ,≤0.015% P, remaining is ferro element；Raw material are carried out to converter smelting successively and LF stoves are smelted；The molten steel formed from LF stoves is generated to the hot-strip of different-thickness by ESP producing lines；Wherein, in ESP producing lines, roughing inlet temperature is 950~1050 DEG C, and the temperature of finish rolling outlet is 800~870 DEG C；Hot-strip is cooled to 530~680 DEG C, coiled subsequently into coiling machine, then carries out scale breading pickling, carries out through 1~3% planisher smooth being taken into library in rolls after pickling.Using the present invention, solve the presence of the problems such as needing follow-up cold rolling and annealing in traditional production technique.
Description
Technical field
The present invention relates to metal material processings and field shaping technique, more specifically, are related to one kind based on ESP completely without head
The method that bar strip continuous casting and rolling flow path produces hot rolling Thin Specs SAPH440 structural steels.
Background technology
In recent years, persistently dropping with steel market, steel are constantly in meagre profit or without sharp states, force steel producer
Have to inquire into the roads Jiang Benzhi, and the country at present further strengthens the attention degree of environmental protection, environmental requirement is again unprecedented stringent, because
This inquires into drop originally and the process for producing steel and iron of environmental protection has become the road of very necessary existence.
It makes full use of ESP development and application new products to meet national overall planning and sector planning, meets national modulation wound phase
Policy Conditions are closed, disclosure satisfy that technique modernization, equipment enlarging, production intensification, resource and energy cycleization, energy consumption are minimum
Change, the optimized high start developing goal of economic benefit, for promoting steel industry energy-saving and emission-reduction and technological progress, promotes enterprise
Transition and upgrade, scientific and technical innovation and product restructuring, all have a very important significance.
Hot rolling structural steel is widely used in the industries such as communications and transportation, vehicle manufacture, engineering machinery.Thin Specs high-strength steel
It uses, so that the enterprise of manufacture vehicle part, engineering machinery etc. is reduced steel usage amount and production cost, while reducing use
Family oil consumption cost.Currently, world energy sources, resource and environmental protection problem are increasingly severe, and steel material realizes high intensity, lightweight
And it is energy-saving as there is an urgent need to solve the above problems, the present invention, which proposes one kind, being based on ESP thin slab continuous casting and rolling streams
The method that journey produces Thin Specs SAPH440 steel.
Invention content
In view of the above problems, the object of the present invention is to provide one kind producing thin rule based on ESP bar strip continuous casting and rolling flow paths
It is strong to meet product to solve to have the problems such as needing follow-up cold rolling and annealing in traditional production technique for the method for lattice SAPH440 steel
The performance requirements such as degree, elongation percentage.
The present invention provides a kind of producing Thin Specs SAPH440 steel based on ESP completely without head bar strip continuous casting and rolling flow path
Method, including：
Select raw material, wherein raw material include by mass percentage：0.04~0.10% C, 0.15~0.45%
Si, 1.00~1.50% Mn, 0.008~0.045% Alt ,≤0.0030% S ,≤0.015% P, remaining is iron member
Element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The molten steel formed from LF stoves is generated to the hot-strip of different-thickness by ESP producing lines；Wherein, in ESP producing lines,
Roughing inlet temperature is 950~1050 DEG C, and the temperature of finish rolling outlet is 800~870 DEG C；
Hot-strip is cooled to 530~680 DEG C, coiled subsequently into coiling machine, then carries out scale breading pickling, through 1 after pickling
~3% planisher progress is smooth to be taken into library in rolls.
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 entry temperature at finishing is
1100~1200 DEG C, the temperature of sensing heating outlet is 1100~1180 DEG C, and roughing outlet temperature is 920~980 DEG C.
Furthermore it is preferred that scheme be that the thickness of hot-strip is 1.0~3.0mm.
Furthermore it is preferred that scheme be that the yield strength of the SAPH440 steel of production is 350~400MPa, tensile strength is
460~500MPa, elongation percentage are >=36%.
From technical solution above it is found that provided by the invention produce Thin Specs based on ESP bar strip continuous casting and rolling flow paths
The method of SAPH440 steel produces Thin Specs SAPH440 microalloying automobiles using ESP completely without head bar strip continuous casting and rolling flow path
Structural steel, for strand without soaking stove heat Direct Rolling, the technological process of production is short, energy saving, and realizes vehicle structure
With " with hot Dai Leng " production technology of steel, follow-up cold rolling and annealing are not needed, greatly reduces cost, realizes vehicle amount, engineering machine
The lightweight demand of " with the Bao Daihou " of the steel such as tool.
To the accomplishment of the foregoing and related purposes, one or more aspects of the present invention includes the spy being particularly described below
Sign.Certain illustrative aspects of the invention is described in detail in the following description and the annexed drawings.However, these aspect instructions are only
It is that some of the various ways in the principles of the present invention can be used.In addition, the present invention is intended to include all such aspects with
And their equivalent.
Description of the drawings
By reference to the content of the explanation below in conjunction with attached drawing, and with a fuller understanding of the present invention, the present invention
Other purposes and result will be more clearly understood and understood.In the accompanying drawings：
Fig. 1 is to produce Thin Specs SAPH440 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 according to the metallographic structure of the SAPH440 steel of the 1.5mm thickness of the generation of the embodiment of the present invention
Figure.
Identical label indicates similar or corresponding feature or function in all the appended drawings.
Specific implementation mode
In the following description, for purposes of illustration, it in order to provide the comprehensive understanding to one or more embodiments, explains
Many details are stated.It may be evident, however, that these embodiments can also be realized without these specific details.
For aforementioned proposition the problems such as capable of solving to exist in traditional production technique the follow-up cold rolling of needs and anneal, 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 SAPH440 steel method, using ESP techniques from
Continuous casting directly generates various thickness specification strip SAPH440 steel, can drop the above problem, and disclosure satisfy that thin gauge strip
Generation technique demand, additionally it is possible to which energy conservation and environmental protection reduces 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, a whole steel band can be produced by casting since it is primary, the no any cutting head cutting tail in centre,
Thus have the advantages that the production of Total continuity strip, single continuous casting line have outstanding production capacity, large-scale production band broadband greatly
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.
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In order to illustrate the side provided by the invention for producing Thin Specs SAPH440 steel based on ESP bar strip continuous casting and rolling flow paths
Method, Fig. 1 is shown according to the ... of the embodiment of the present invention produces Thin Specs SAPH440 steel based on ESP bar strip continuous casting and rolling flow paths
Method flow.
As shown in Figure 1, provided by the invention produce Thin Specs SAPH440 steel based on ESP bar strip continuous casting and rolling flow paths
Method includes：
S110：Select raw material, wherein raw material include by mass percentage：0.04~0.10% C, 0.15~
0.45% Si, 1.00~1.50% Mn, 0.008~0.045% Alt ,≤0.0030% S ,≤0.015% P,
Remaining is ferro element；
S120：Raw material are carried out to converter smelting successively and LF stoves are smelted；
S130：The molten steel formed from LF stoves is generated to the hot-strip of different-thickness by ESP producing lines；Wherein, it is produced in ESP
In line, roughing inlet temperature is 950~1050 DEG C, and the temperature of finish rolling outlet is 800~870 DEG C；
S140：Hot-strip is cooled to 530~680 DEG C, coiled subsequently into coiling machine, then carries out scale breading pickling, pickling
It is taken into library in rolls by 1~3% planisher progress is smooth.
Above-mentioned steps are the specific method using ESP Process Production SAPH440 steel, and the present invention produces Thin Specs SAPH440
The method of steel specifically includes smelting procedure, completely without head ESP thin slab continuous casting and rolling process, cooling process, coiling process, i.e.,：It is mixed
Iron furnace → molten iron pretreatment → BOF (converter smelting) → LF (smelting of LF stoves) → ESP continuous casting and rollings → section cooling → batch →
Pickling → → smooth → finished product.Wherein, strand is rolled through three passage roughing, and the sensed stove of base product adds among roughing, is passed through
Base is rolled into different-thickness hot-strip through 5 passage finish rolling among sensing heating, and steel band is air-cooled to certain temperature through laminar flow section, so
It is coiled to enter coiling machine afterwards.
SAPH440 steel yield strengths prepared by the present invention are 350~400MPa, and tensile strength is 460~500MPa, is extended
Rate is >=36%, and Fig. 2 shows the matrix of the SAPH440 steel of the 1.5mm thickness of generation according to the ... of the embodiment of the present invention
Structure.Fig. 2 implement shown in be 1.5mm thickness 200 × be organized as F+P crystal grain, and be rated 10 grades, wherein metallographic structure
For ferrite and pearlite.Use this technique and can produce ultra-thin strip, it can be achieved that with Bao Daihou, with hot Dai Leng, have very high
Economic results in society.
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~3.0mm, product thickness deflection is big, at
Product tissue crystal grain is tiny；Conticaster 3.5~6.0m/min of pulling rate, the sensed heating stove heat of intermediate 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, and rapid cooling after finish rolling can stable rolling production
Thin Specs high-strength steel, the elongated thickness of hot rolled coil is uniform, and performance is stablized.
In the step S110 of the present invention, in the raw material selection for generating SAPH440 steel, the mass percent of C is
0.04~0.10%, C are the important element for improving the strength of materials, and rational composition design can guarantee 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, which is 0.15~0.45%, Si, has preferable deoxidation effect, adds in steelmaking process
Silicon can effectively inhibit the precipitation of carbide, but excessively high, reduce the welding performance of steel as reducing agent and deoxidier.Therefore at this
The control of Si contents is 0.15%~0.45% in invention.
Ratio shared in raw material Mn is 1.0%~1.50%, Mn can postpone perlitic transformation strongly, be conducive to shellfish
Family name's body is formed, but it is excessively high may make grain coarsening, weaken the resistance to corrosion of steel, reduce welding performance.And Mn contents increase,
Martensite quenching degree can be improved, be unfavorable for elongation percentage.Therefore Mn contents control in the present invention is 1.0%~1.50%.
Ratio shared in raw material Alt is 0.008%~0.04%, and aluminium is deoxidant element in strong steel, is improved
The cleanliness factor of molten steel, prevents titanium by oxidational losses.Therefore Alt contents control in the present invention is 0.008%~0.040%.
In the step s 120, converter is carried out according to the ingredient of above-mentioned (step S110), LF stoves are smelted and RH stoves refine.?
That is molten iron refines to obtain the molten steel of required ingredient using LF stoves after converter smelting.
In step s 130, in ESP producing lines, the temperature that strand enters roughing entrance is 950~1050 DEG C, and intermediate base exists
It is initially entered in induction heater before into mm finishing mill unit, (sensing heating outlet temperature is 1100~1180 DEG C to IH, is added from induction
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 on generating equipment, to generate the SAPH440 steel of 1.0~3.0mm not equal thickness.
In an embodiment of the present invention, at anti-between the thickness and its yield strength, tensile strength of the SAPH440 steel of generation
Than if the thickness of the SAPH440 steel generated is big, yield strength and tensile strength can reduce, if what is generated is low
The thickness of SAPH440 steel is small, then its yield strength and tensile strength will increase.
Wherein, it should be noted that IH is sensing heating outlet temperature, and induction heater is located at after rotating hub cuts, finish rolling
The effect of position before machine, sensing heating is heating strip, ensures final rolling temperature, it may also be said to be the temperature for adjusting intermediate base
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
It closes, is higher than a certain temperature then waste of energy.
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
It is poured, the strand come out from conticaster is directly entered 3 frame roughing mills and intermediate base is made, and then passes through rocking shears, by strand
Head wedge-shaped segment is segmented and is cut away, then strand enter piler (effect of piler be ought below equipment break down
When, can be offline at this piler).Directly pass through when normal rolling, then intermediate base is through rotary hub type flying shear crop end, then
1100~1180 DEG C are heated into induction heater, subsequently enters mm finishing mill unit, hot-strip is out generated from mm finishing mill unit.
The hot-strip generated from mm finishing mill unit batches storage after cooling down twice.
According to the method for above-mentioned generation SAPH440 steel, the present invention is further described according to following embodiment.
Embodiment 1
Select raw material, wherein raw material include by mass percentage：0.050% C, 0.25% Si, 1.25%
Mn, 0.012% P, 0.0020% S, 0.028% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 18 DEG C, pulling rate 5.3m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 1020 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
It will be controlled at 1150 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among sensed heating is rolled into 1.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 850 DEG C；
By steel band through section cooling, 610 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 1% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 1：
Table 1
Embodiment 2
Select raw material, wherein raw material include by mass percentage：0.051% C, 0.25% Si, 1.28%
Mn, 0.012% P, 0.0025% S, 0.030% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 20 DEG C, pulling rate 5.3m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 1010 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
It will be controlled at 1150 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among sensed heating is rolled into 1.6mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 850 DEG C；
By steel band through section cooling, 610 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 1% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 2：
Table 2
Embodiment 3
Select raw material, wherein raw material include by mass percentage：0.049% C, 0.26% Si, 1.33%
Mn, 0.012% P, 0.0020% S, 0.030% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 21 DEG C, pulling rate 5.2m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 1010 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
It will be controlled at 1150 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among 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, 615 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 1.5% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 3：
Table 3
Embodiment 4
Select raw material, wherein raw material include by mass percentage：0.052% C, 0.30% Si, 1.30%
Mn, 0.012% P, 0.0030% S, 0.031% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 19 DEG C, pulling rate 5.2m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 1000 DEG C of roughing inlet temperature, 960 DEG C of roughing outlet temperature；
It will be controlled at 1150 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among sensed heating is rolled into 2.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 840 DEG C；
By steel band through section cooling, 610 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 1.5% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 4：
Table 4
Embodiment 5
Select raw material, wherein raw material include by mass percentage：0.051% C, 0.31% Si, 1.31%
Mn, 0.011% P, 0.0030% S, 0.030% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 18 DEG C, pulling rate 5.2m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 990 DEG C of roughing inlet temperature, 960 DEG C of roughing outlet temperature；
It will be controlled at 1150 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among 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, 630 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 1.5% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 5：
Table 5
Embodiment 6
Select raw material, wherein raw material include by mass percentage：0.053% C, 0.35% Si, 1.35%
Mn, 0.012% P, 0.0010% S, 0.028% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 18 DEG C, pulling rate 5.1m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 980 DEG C of roughing inlet temperature, 950 DEG C of roughing outlet temperature；
It will be controlled at 1160 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among 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, 600 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 1.2% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 6：
Table 6
Embodiment 7
Select raw material, wherein raw material include by mass percentage：0.050% C, 0.32% Si, 1.50%
Mn, 0.010% P, 0.0020% S, 0.030% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 22 DEG C, pulling rate 5.0m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 970 DEG C of roughing inlet temperature, 950 DEG C of roughing outlet temperature；
It will be controlled at 1150 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among 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, 600 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 1.0% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 7：
Table 7
Embodiment 8
Select raw material, wherein raw material include by mass percentage：0.040% C, 0.32% Si, 1.0%
Mn, 0.015% P, 0.0020% S, 0.040% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 22 DEG C, pulling rate 5.0m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 950 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
It will be controlled at 1180 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among sensed heating is rolled into 1.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 820 DEG C；
By steel band through section cooling, 530 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 2.0% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 8：
Table 8
Embodiment 9
Select raw material, wherein raw material include by mass percentage：0.10% C, 0.15% Si, 1.5%
Mn, 0.012% P, 0.0020% S, 0.008% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 22 DEG C, pulling rate 6.0m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 1050 DEG C of roughing inlet temperature, 950 DEG C of roughing outlet temperature；
It will be controlled at 1100 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among sensed heating is rolled into 2.5mm thickness hot-strips, exit temperature at finishing control through 7 passage finish rolling
At 800 DEG C；
By steel band through section cooling, 600 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 3.0% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 9：
Table 9
Embodiment 10
Select raw material, wherein raw material include by mass percentage：0.050% C, 0.45% Si, 1.30%
Mn, 0.008% P, 0.0010% S, 0.045% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 22 DEG C, pulling rate 3.5m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 1000 DEG C of roughing inlet temperature, 950 DEG C of roughing outlet temperature；
It will be controlled at 1160 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among sensed heating is rolled into 2.0mm thickness hot-strips, exit temperature at finishing control through 7 passage finish rolling
At 820 DEG C；
By steel band through section cooling, 680 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 1.0% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 10：
Table 10
Embodiment 11
Select raw material, wherein raw material include by mass percentage：0.060% C, 0.2% Si, 1.45%
Mn, 0.009% P, 0.0020% S, 0.040% Alt, remaining is ferro element；
Raw material are carried out to converter smelting successively and LF stoves are smelted；
The passed through ESP producing lines continuous casting of molten steel, roughing through LF refining sensing heating, finish rolling, section cooling, batch, acid
It washes, the hot-strip of flattening process production different-thickness.
Wherein, in ESP producing lines, continuous casting working procedure controls 22 DEG C, pulling rate 5.0m/min of the tundish degree of superheat, slab thickness
95mm；
Strand is rolled through three passage roughing, 950 DEG C of roughing inlet temperature, 950 DEG C of roughing outlet temperature；
It will be controlled at 1180 DEG C through the sensed stove heat of base product among roughing, induction furnace IH outlet temperatures；
Base among sensed heating is rolled into 3.0mm thickness hot-strips, exit temperature at finishing control through 7 passage finish rolling
At 870 DEG C；
By steel band through section cooling, 600 DEG C are cooled to using leading portion refrigerating mode, it is coiled subsequently into coiling machine；
Hot rolling is subjected to scale breading pickling, library is taken into rolls using 2.0% smooth amount progress is smooth.
The performance of the SAPH440 steel of generation is as shown in table 11：
Table 11
It can ignore not it should be noted that floating of the SAPH440 steel of above-described embodiment generation on thickness is very small
Meter, yield strength and tensile strength have floating up and down for 30MPa, illustrate hereby in the present invention.Wherein, SAPH440 steel
Specification be 1.0mm × 1250mm~2.5mm × 1250mm；Obtaining through above-described embodiment is bent by SAPH440 steel as shown in Table 1
Take intensity, tensile strength and elongation percentage.
It is by the above embodiment as can be seen that provided by the invention thin based on the production of ESP bar strip continuous casting and rolling flow paths
The method of specification SAPH440 steel produces Thin Specs SAPH440 microalloyings using ESP completely without head bar strip continuous casting and rolling flow path
Vehicle structure steel realizes " cold with the torrid zone " production technology of vehicle structure steel, does not need follow-up cold rolling and annealing, drop significantly
Low cost realizes the lightweight demand of vehicle structure steel " with Bao Daihou ".
It is described in an illustrative manner above with reference to attached drawing and is based on ESP thin slab continuous casting and rolling streams according to proposed by the present invention
The method that journey produces Thin Specs SAPH440 steel.It will be understood by those skilled in the art, however, that being proposed for aforementioned present invention
Based on ESP bar strip continuous casting and rolling flow paths produce Thin Specs SAPH440 steel method, the content of present invention can also not departed from
On the basis of make various improvement.Therefore, protection scope of the present invention should be determined by the content of appended claims.
Claims (4)
1. a kind of method producing Thin Specs SAPH440 steel based on ESP bar strip continuous casting and rolling flow paths, which is characterized in that including：
Select raw material, wherein the raw material include by mass percentage：0.049~0.10% C, 0.15~0.45%
Si, 1.00~1.50% Mn, 0.008~0.045% Alt ,≤0.0030% S ,≤0.015% P, remaining is iron
Element；
The raw material are carried out to converter smelting successively and LF stoves are smelted；
The molten steel formed from the LF stoves is generated to the hot-strip of different-thickness by ESP producing lines；Wherein, it is produced in the ESP
In line, roughing inlet temperature is 950~1050 DEG C, and the temperature of finish rolling outlet is 800~870 DEG C, the temperature of sensing heating outlet
It it is 1100~1180 DEG C, the thickness of the hot-strip is 1.0~3.0mm；
The hot-strip is cooled to 530~680 DEG C, coiled subsequently into coiling machine, then carries out scale breading pickling, through 1 after pickling
~3% smooth amount progress is smooth to be taken into library in rolls.
2. the method that Thin Specs SAPH440 steel is produced based on ESP bar strip continuous casting and rolling flow paths as described in claim 1,
It is characterized in that,
In the ESP producing lines, 3.5~6.0m/min of pulling speed of continuous casting, slab thickness 90mm~110mm.
3. the method that Thin Specs SAPH440 steel is produced based on ESP bar strip continuous casting and rolling flow paths as described in claim 1,
It is characterized in that,
In the ESP producing lines, strand directly carries out hot rolling, wherein entry temperature at finishing is 1100~1200 DEG C, roughing outlet
Temperature is 920~980 DEG C.
4. the method that Thin Specs SAPH440 steel is produced based on ESP bar strip continuous casting and rolling flow paths as described in claim 1,
It is characterized in that,
The yield strength of the SAPH440 steel of production be 350~400MPa, tensile strength be 460~500MPa, elongation percentage be >=
36%.
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| 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 |
| CN109055867B (en) * | 2018-08-30 | 2021-06-29 | 日照钢铁控股集团有限公司 | Method for producing high-hole-expansion hot-dip galvanized plate with tensile strength of 540MPa |
| CN109517958B (en) * | 2018-11-30 | 2020-08-18 | 日照钢铁控股集团有限公司 | Production method of hot-rolled pickled steel plate MM390 for electroplating |
| CN112941416A (en) * | 2021-02-26 | 2021-06-11 | 日照钢铁控股集团有限公司 | Heat-based raw material with thickness of 0.7-2.5mm and method for preparing low-strength-level galvanized sheet by using same |
| CN113042563A (en) * | 2021-03-17 | 2021-06-29 | 包头钢铁（集团）有限责任公司 | Manufacturing method of SPHE hot-rolled pickled plate for stamping |
| CN113637831A (en) * | 2021-07-22 | 2021-11-12 | 湖北大帆金属制品有限公司 | Processing technology of SAPH440 high-strength structural steel |
| CN115418442B (en) * | 2021-10-30 | 2023-06-09 | 日照宝华新材料有限公司 | LF furnace smelting titanium reduction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219434A (en) * | 2008-01-25 | 2008-07-16 | 广州珠江钢铁有限责任公司 | Method for producing steel for automobile wheel based on bar strip continuous casting and rolling flow path |
| CN106077090A (en) * | 2016-06-06 | 2016-11-09 | 日照宝华新材料有限公司 | The method producing Thin Specs checkered steel plate based on ESP bar strip continuous casting and rolling flow path |
| CN106222561A (en) * | 2016-08-30 | 2016-12-14 | 日照宝华新材料有限公司 | The method producing low-carbon (LC) fire-fighting equipment steel based on ESP bar strip continuous casting and rolling flow path |
-
2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219434A (en) * | 2008-01-25 | 2008-07-16 | 广州珠江钢铁有限责任公司 | Method for producing steel for automobile wheel based on bar strip continuous casting and rolling flow path |
| CN106077090A (en) * | 2016-06-06 | 2016-11-09 | 日照宝华新材料有限公司 | The method producing Thin Specs checkered steel plate based on ESP bar strip continuous casting and rolling flow path |
| CN106222561A (en) * | 2016-08-30 | 2016-12-14 | 日照宝华新材料有限公司 | The method producing low-carbon (LC) fire-fighting equipment steel based on ESP bar strip continuous casting and rolling flow path |
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Denomination of invention: Method for producing thin specification saph440 steel based on ESP thin slab continuous casting and rolling process Effective date of registration: 20211222 Granted publication date: 20181106 Pledgee: Rizhao Bank Co., Ltd Pledgor: RIZHAO STEEL HOLDING GROUP Co.,Ltd. Registration number: Y2021980015819 |