CN106756561A - The method that Thin Specs RE52Mn steel is produced based on ESP bar strip continuous casting and rolling flow paths - Google Patents
The method that Thin Specs RE52Mn steel is produced based on ESP bar strip continuous casting and rolling flow paths Download PDFInfo
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- CN106756561A CN106756561A CN201611261690.1A CN201611261690A CN106756561A CN 106756561 A CN106756561 A CN 106756561A CN 201611261690 A CN201611261690 A CN 201611261690A CN 106756561 A CN106756561 A CN 106756561A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Abstract
The present invention provides a kind of method that Thin Specs RE52Mn 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：0.47~0.57% C, 0.15~0.25% Si, 0.50~0.80% Mn, 0.12~0.25% Cr ,≤0.003% S ,≤0.012% P ,≤0.005% N, remaining is ferro element；Raw material are carried out converter smelting successively and LF stoves are smelted；The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be smelted from LF stoves；Wherein, in ESP producing lines, roughing outlet temperature is 920~980 DEG C, and the temperature of finish rolling outlet is 810~870 DEG C；Hot-strip is cooled to 640~740 DEG C, and storage is batched subsequently into coiling machine.Using the present invention, the problems such as solve incomplete steel plate annealing nodularization after steel plate annealing present in traditional heavy slab hot continuous rolling production technology or modifier treatment or uneven quenching hardness.
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 RE52Mn 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.
Medium high carbon Fine Steel Casting iron, carbon tool steel, spring steel, structural alloy steel and alloy tool steel, have been widely used
In fields such as automobile making, engineering machinery, special equipment, high-end saw blade and special implements.It is high in high-quality both at home and abroad at present
Carbon alloy steel production technology is main with traditional heavy slab hot continuous rolling production technology, and production process has the stabilization of ladle chemistry
The segregation of element is serious in lack of homogeneity, strand, surface of steel plate decarburized layer is serious, board dimension low precision, stability are poor
The shortcomings of, these problems directly affects the quality problem of operation heat treatment process after steel plate, cause steel plate annealing or quenched place
Steel plate annealing nodularization is incomplete after reason or the problems such as uneven quenching hardness.
To solve the above problems, the present invention proposes a kind of based on ESP bar strip continuous casting and rolling flow paths production Thin Specs
The method of RE52Mn 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 RE52Mn steel, after solving steel plate annealing present in traditional heavy slab hot continuous rolling production technology or modifier treatment
Steel plate annealing nodularization is incomplete or the problems such as uneven quenching hardness.
The present invention provides a kind of method that Thin Specs RE52Mn 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：0.47~0.57% C, 0.15~0.25%
Si, 0.50~0.80% Mn, 0.12~0.25% Cr ,≤0.003% S ,≤0.012% P ,≤0.005% N,
Remaining is ferro element；
Raw material are carried out converter smelting successively and LF stoves are smelted；
The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be smelted from LF stoves；Wherein, produced in ESP
In line, roughing outlet temperature is 920~980 DEG C, and the temperature of finish rolling outlet is 810~870 DEG C；
Hot-strip is cooled to 640~740 DEG C, and storage is batched subsequently into coiling machine.
Furthermore it is preferred that scheme be, in ESP producing lines, 3.5~6.0m/min of pulling speed of continuous casting, slab thickness 90mm~
110mm。
Furthermore it is preferred that scheme be that in ESP producing lines, strand directly carries out hot rolling, and strand directly carries out hot rolling, wherein,
Roughing inlet temperature is 930~980 DEG C, and the temperature of sensing heating outlet is 1150~1180 DEG C.
Furthermore it is preferred that scheme be that the thickness of hot-strip is 1.2~3.5mm.
Furthermore it is preferred that scheme be that the yield strength of the RE52MN steel of production is 450~500MPa, and tensile strength is 740
~800MPa, elongation percentage is 18~22%.
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 RE52Mn steel, various thickness specification strip RE52Mn steel are directly generated using ESP techniques from continuous casting, can solve the problem that tradition
After steel plate annealing present in heavy slab hot continuous rolling production technology or modifier treatment steel plate annealing nodularization not exclusively or quenching hardness
Uneven the problems such as, the generation technique demand of thin gauge strip can either be met, at the same also can energy-conserving and environment-protective reduction be produced into
This.
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 RE52Mn 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 metallographic structure of the RE52MN steel of the 1.5mm thickness of the generation according to the embodiment of the present invention
Figure.
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.
Steel plate annealing or quenched present in traditional heavy slab hot continuous rolling production technology is can solve the problem that for foregoing proposition
Steel plate annealing nodularization is incomplete after treatment or the problems such as uneven quenching hardness, the present invention proposes a kind of based on ESP sheet billets
The method that continuous casting and rolling flow produces Thin Specs RE52Mn steel, various thickness specification bands are directly generated using ESP techniques from continuous casting
Steel RE52Mn steel, can solve the problem that above mentioned problem, and disclosure satisfy that the generation technique demand of thin gauge strip, additionally it is possible to energy-saving ring
Protecting 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, 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 RE52Mn 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 RE52Mn 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 RE52Mn 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：0.47~0.57% C, 0.15~
0.25% Si, 0.50~0.80% Mn, 0.12~0.25% Cr ,≤0.003% S ,≤0.012% P ,≤
0.005% N, remaining is ferro element and inevitable impurity；
S120：Raw material are carried out converter smelting successively and LF stoves are smelted；
S130：The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be smelted from LF stoves；Wherein, exist
In ESP producing lines, roughing outlet temperature is 920~980 DEG C, and the temperature of finish rolling outlet is 810~870 DEG C；
S140：Hot-strip is cooled to 640~740 DEG C, and storage is batched subsequently into coiling machine.
Above-mentioned steps are the specific method using ESP Process Production RE52Mn steel, present invention production Thin Specs RE52Mn 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 (smelting of LF stoves) → ESP continuous casting and rollings → batch → slow cooling → finished product.Its
In, strand is rolled through three passage roughing, and the sensed stove of base product adds in the middle of roughing, and base is through 5 passages in the middle of sensed heating
Finish rolling is rolled into different-thickness hot-strip, and steel band is air cooled to uniform temperature through laminar flow section, coiled subsequently into coiling machine.
The yield strength of the RE52Mn steel of RE52Mn steel yield strength production prepared by the present invention is 450~500MPa, is resisted
Tensile strength is 740~800MPa, and elongation percentage is that 18~22%, Fig. 2 shows that the 1.5mm of generation according to embodiments of the present invention is thick
The structure of the matrix of the RE52Mn steel of degree.Metallographic structure is sorbite, pearlite, ferrite.Can be given birth to using the present invention
Ultra-thin strip is produced, cold rolling process rolling pass can be reduced, " with Bao Daihou " energy-saving purpose is reached, with society very high
Economic benefit.
It should be noted that ESP is completely without head casting and rolling process, refined at the beginning of 300t converters, 300tLF refinings, continuous casting is equipped with big
Bag Lower proterozoic group, crystallizer is equipped with electromagnetic braking, and Molten Steel Cleanliness is high, Composition Control stabilization, and casting blank solidification speed is fast, as cast condition group
Knit more uniform, Segregation of Chemical Composition small, strand realizes direct casting without soaking stove heat, strand is low in operation of rolling temperature,
Rolling time is short, and reduction in pass is big, helps to reduce plate surface decarburization, refinement pearlite piece interlamellar spacing, can substantially disappear
The problems such as component segregation, skin decarburization, the unstable structure property that high-carbon strip is present being produced except traditional process.ESP continuous casting billets
Thickness 90mm~110mm, hot rolling product thickness 1.2mm~3.5mm, ESP does not need threading, hot rolling completely without head casting and rolling process
Roll up elongated thickness uniform, dimensional accuracy is high, stable performance, be conducive to improving the service life of the products such as saw blade, cutter.
In step S110 of the invention, in the raw material selection of generation RE52Mn steel, the mass percent of C is 0.47
~0.57%, C element is the main element for ensureing the strength of materials, hardness and wearability, and medium and high carbon steel requirement has higher
Intensity and fatigue limit, typically all by being used in the state of quenching+average tempering, with obtain elastic limit higher and
Toughness.Be the intensity for ensureing steel, enough carbon must be contained in medium and high carbon steel, with ensure the yield strength of material, tensile strength,
The indices such as hardness can meet the requirements.Carbon forms solid solution in being dissolved in steel, serves solution strengthening effect, is
Main intensified element in steel.When it can combine to form Carbide Precipitation together with carbide, precipitation is served
The effect of reinforcing, carbon is the element maximum to the intensity contribution of steel, is also the element for influenceing the elasticity attenuation resistance of steel maximum.Therefore
C content control in the present invention is 0.47%~0.57%.
Ratios of the Si in raw material be 0.15~0.25%, Si in addition to the intensity that can improve steel, Si can improve horse
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 0.15%~0.25%.
Mn shared in raw material ratio is to improve the quenching degree of steel for the maximum effect of 0.50~0.80%, Mn, together
When be also important solution strengthening element.Manganese is carbide former, can also be existed with solid solution condition, also with refinement pearly-lustre
The effect of body tissue, thus the intensity and hardness of ferrite austenite can be improved.Anti- temper softening abilities of the Mn to raising steel
Have certain effect, but Mn contents it is higher when have the tendency of coarsened grain and increase temper brittleness, bring difficulty to processing.Therefore
The control of Mn contents is 0.50%~0.80% in the present invention.
Cr shared in raw material ratio is 0.12~0.25%, and chromium can reduce the activity of carbon in steel, be again strong
Carbide former, chromium is the quenching degree that can significantly improve steel, and the effect shared with manganese can be more preferable, can mitigate the de- of steel
Carbon is inclined to, and improves the activation energy of carbon spread in steel.Therefore Gr contents control in the present invention is 0.12%~0.25%.
In the step s 120, converter, LF stoves is carried out according to the composition of above-mentioned (step S110) to smelt.That is, molten iron
Obtain 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 930~980 DEG C, and middle base exists
Initially entered before into mm finishing mill unit in induction heater, (sensing heating outlet temperature is 1150~1180 DEG C to IH, is added from sensing
Hot stove out enters mm finishing mill unit, and the temperature of finish rolling outlet is not less than 810 DEG C, also, in ESP producing lines, according to reality
Demand, sets different parameters in generation equipment, so as to generate the RE52Mn steel of 1.2~3.5mm not equal thickness.
In an embodiment of the present invention, between the thickness and its yield strength, tensile strength of the RE52Mn steel of generation into anti-
Than if the thickness of the RE52Mn steel of generation is big, then its yield strength and tensile strength can reduce, if generation is low
The thickness of RE52Mn steel is small, then its yield strength and tensile strength can increase.
, wherein it is desired to explanation, IH is sensing heating outlet temperature, after induction heater is cut positioned at rotating hub, finish rolling
Position before machine, the effect of sensing heating is heating strip, it is ensured that final rolling temperature, it may also be said to be the temperature of base in the middle of regulation
Degree, depending on IH temperature is according to strip finish rolling requirement and consideration to strip steel surface quality, final rolling temperature can be caused not less than a certain temperature
Close, the energy is then wasted higher than a certain temperature.
Wherein, in ESP producing lines, the molten steel for smelting out from LF stoves enters conticaster, with the pulling rate of 3.5~6.5m/min
Cast, being directly entered 3 frame roughing mills from conticaster strand out is made middle base, then by rocking shears, by strand
Head wedge-shaped segment is segmented and is cut away, and then into piler, (effect of piler is equipment to break down below to strand
When, can be offline at this piler).Directly pass through during normal rolling, then in the middle of base through rotary hub type flying shear crop end, then
1150~1180 DEG C are heated into induction heater, mm finishing mill unit is subsequently entered, hot-strip is out generated from mm finishing mill unit.
Storage is batched after cooling down twice from the hot-strip of mm finishing mill unit generation.
According to the method for above-mentioned generation RE52Mn steel, the present invention is further described according to examples below.
Embodiment 1
Selection raw material, wherein, raw material include by mass percentage：0.52% C, 0.22% Si, 0.60%
Mn, 0.0020% S, 0.010% P, 0.018% Cr, 0.0035% N, remaining be ferro element and inevitably it is miscellaneous
Matter；
Raw material are carried out converter smelting, LF stoves successively to smelt；
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
Wherein, in ESP producing lines, 22 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 4.85m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 970 DEG C of roughing inlet temperature, 950 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 1.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 850 DEG C；
Steel band is air cooled to 720 DEG C through laminar flow section, it is coiled subsequently into coiling machine, by outbound after coil of strip slow cooling 48 hours.
The performance of the RE52Mn steel of generation is as shown in table 1：
Table 1
Embodiment 2
Selection raw material, wherein, raw material include by mass percentage：0.51% C, 0.23% Si, 0.61%
Mn, 0.012% P, 0.0020% S, 0.019% Cr, 0.0038% N, remaining be ferro element and inevitably it is miscellaneous
Matter；
Raw material are carried out converter smelting, LF stoves successively to smelt；
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
Wherein, in ESP producing lines, 20 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 4.85m/min, slab thickness
95mm；
Strand is rolled through three passage roughing, 970 DEG C of roughing inlet temperature, 940 DEG C of roughing outlet temperature；
To be controlled at 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 1.6mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 840 DEG C；
Steel band is air cooled to 720 DEG C through laminar flow section, it is coiled subsequently into coiling machine, by outbound after coil of strip slow cooling 48 hours.
The performance of the RE52Mn steel of generation is as shown in table 2：
Table 2
Embodiment 3
Selection raw material, wherein, raw material include by mass percentage：0.51% C, 0.23% Si, 0.61%
Mn, 0.012% P, 0.0020% S, 0.019% Cr, 0.0038% N, remaining be ferro element and inevitably it is miscellaneous
Matter；
Raw material are carried out converter smelting, LF stoves successively to smelt；
Through the molten steel institute of LF refining different thickness are generated by ESP producing lines continuous casting, roughing, finish rolling, section cooling, coiling technique
The hot-strip of degree, wherein,
19 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 4.80m/min, slab thickness 95mm；
Strand is rolled through three passage roughing, 960 DEG C of roughing inlet temperature, 930 DEG C of roughing outlet temperature；
To be controlled at 1180 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.8mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 840 DEG C；
Steel band is cold through laminar flow, 710 DEG C are cooled to using leading portion refrigerating mode, be put in storage in rolls subsequently into coiling machine.
The performance of the RE52Mn steel of generation is as shown in table 3：
Table 3
Embodiment 4
Selection raw material, wherein, raw material include by mass percentage：0.53% C, 0.24% Si, 0.62%
Mn, 0.011% P, 0.0022% S, 0.020% Cr, 0.0037% N, remaining be ferro element and inevitably it is miscellaneous
Matter；
Raw material are carried out converter smelting, LF stoves successively to smelt；
Through the molten steel institute of LF refining different thickness are generated by ESP producing lines continuous casting, roughing, finish rolling, section cooling, coiling technique
The hot-strip of degree.
20 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 4.8m/min, slab thickness 95mm；
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 1180 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 2.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 830 DEG C；
Steel band is air cooled to 700 DEG C through laminar flow section, it is coiled subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE52Mn steel of generation is as shown in table 4：
Table 4
Embodiment 5
Selection raw material, wherein, raw material include by mass percentage：0.53% C, 0.24% Si, 0.62%
Mn, 0.011% P, 0.0022% S, 0.020% Cr, 0.0037% N, remaining be ferro element and inevitably it is miscellaneous
Matter；
Raw material are carried out converter smelting, LF stoves successively to smelt；
The molten steel to be formed institute will be smelted from LF stoves to be given birth to by ESP producing lines continuous casting, roughing, finish rolling, section cooling, coiling technique
Into the hot-strip of different-thickness, wherein, in ESP producing lines, 20 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 3.5m/
Min, slab thickness 95mm；
Strand is rolled through three passage roughing, 940 DEG C of roughing inlet temperature, 910 DEG C of roughing outlet temperature；
To be controlled at 1180 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 2.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 820 DEG C；
Steel band is air cooled to 700 DEG C through laminar flow section, it is coiled subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE52Mn steel of generation is as shown in table 5：
Table 5
Embodiment 6
Selection raw material, wherein, raw material include by mass percentage：0.52% C, 0.22% Si, 0.65%
Mn, 0.011% P, 0.0020% S, 0.022% Cr, 0.0032% N, remaining be ferro element and inevitably it is miscellaneous
Matter；
Raw material are carried out converter smelting, LF stoves successively to smelt；
The molten steel to be formed institute will be smelted from LF stoves to be given birth to by ESP producing lines continuous casting, roughing, finish rolling, section cooling, coiling technique
Into the hot-strip of different-thickness, wherein, in ESP producing lines, 23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 3.5m/
Min, slab thickness 95mm；
Strand is rolled through three passage roughing, 940 DEG C of roughing inlet temperature, 910 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 3.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 820 DEG C；
Steel band is air cooled to 700 DEG C through laminar flow section, it is coiled subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE52Mn steel of generation is as shown in table 6：
Table 6
Embodiment 7
Selection raw material, wherein, raw material include by mass percentage：0.50% C, 0.22% Si, 0.5%
Mn, 0.012% P, 0.0030% S, 0.022% Cr, 0.0032% N, remaining be ferro element and inevitably it is miscellaneous
Matter；
Raw material are carried out converter smelting, LF stoves successively to smelt；
The molten steel to be formed institute will be smelted from LF stoves to be given birth to by ESP producing lines continuous casting, roughing, finish rolling, section cooling, coiling technique
Into the hot-strip of different-thickness, wherein, in ESP producing lines, 23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 3.5m/
Min, slab thickness 95mm；
Strand is rolled through three passage roughing, 930 DEG C of roughing inlet temperature, 920 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 3.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 870 DEG C；
Steel band is air cooled to 740 DEG C through laminar flow section, it is coiled subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE52Mn steel of generation is as shown in table 7：
Table 7
Embodiment 8
Selection raw material, wherein, raw material include by mass percentage：0.54% C, 0.15% Si, 0.80%
Mn, 0.011% P, 0.0020% S, 0.012% Cr, 0.005% N, remaining be ferro element and inevitably it is miscellaneous
Matter；
Raw material are carried out converter smelting, LF stoves successively to smelt；
The molten steel to be formed institute will be smelted from LF stoves to be given birth to by ESP producing lines continuous casting, roughing, finish rolling, section cooling, coiling technique
Into the hot-strip of different-thickness, wherein, in ESP producing lines, 23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 6.0m/
Min, slab thickness 95mm；
Strand is rolled through three passage roughing, 980 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
To be controlled at 1180 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 3.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 810 DEG C；
Steel band is air cooled to 640 DEG C through laminar flow section, it is coiled subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE52Mn steel of generation is as shown in table 8：
Table 8
Embodiment 9
Selection raw material, wherein, raw material include by mass percentage：0.49% C, 0.25% Si, 0.50%
Mn, 0.011% P, 0.0020% S, 0.025% Cr, 0.005% N, remaining be ferro element and inevitably it is miscellaneous
Matter；
Raw material are carried out converter smelting, LF stoves successively to smelt；
The molten steel to be formed institute will be smelted from LF stoves to be given birth to by ESP producing lines continuous casting, roughing, finish rolling, section cooling, coiling technique
Into the hot-strip of different-thickness, wherein, in ESP producing lines, 23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 6.0m/
Min, slab thickness 95mm；
Strand is rolled through three passage roughing, 980 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
To be controlled at 1180 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 3.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 810 DEG C；
Steel band is air cooled to 640 DEG C through laminar flow section, it is coiled subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE52Mn steel of generation is as shown in table 9：
Table 9
It should be noted that floating of the RE52Mn steel of above-described embodiment generation on thickness is very small can ignore not
Meter, yield strength and tensile strength have fluctuating for 30MPa, illustrate hereby in the present invention.Wherein, RE52Mn steel
Specification is 1.2mm × 1250mm~3.5mm × 1250mm；Show that RE52Mn steel as shown in table 1 is surrendered through above-described embodiment
Intensity, tensile strength and elongation percentage.
The thin based on the production of ESP bar strip continuous casting and rolling flow paths of present invention offer can be seen that by above-mentioned implementation method
The method of specification RE52Mn steel, various thickness specification strip RE52Mn steel are directly generated using ESP techniques from continuous casting, be can solve the problem that
Steel plate annealing nodularization is incomplete after steel plate annealing present in traditional heavy slab hot continuous rolling production technology or modifier treatment or quenches
The problems such as hardness is uneven, can either meet the generation technique demand of thin gauge strip, while also being capable of energy-conserving and environment-protective reduction life
Produce cost.
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 RE52Mn steel.It will be understood by those skilled in the art, however, that proposed for the invention described above
The method that Thin Specs RE52Mn 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 RE52Mn steel method, it is characterised in that including：
Selection raw material, wherein, the raw material include by mass percentage：0.47~0.57% C, 0.15~0.25%
Si, 0.50~0.80% Mn, 0.12~0.25% Cr ,≤0.003% S ,≤0.012% P ,≤0.005% N,
Remaining is ferro element；
The raw material are carried out converter smelting successively and LF stoves are smelted；
The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be smelted from the LF stoves；Wherein, described
In ESP producing lines, roughing outlet temperature is 920~980 DEG C, and the temperature of finish rolling outlet is 810~870 DEG C；
The hot-strip is cooled to 640~740 DEG C, and storage is batched subsequently into coiling machine.
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 RE52Mn steel, it is special
Levy and be,
In the ESP producing lines, 3.5~6.0m/min of pulling speed of continuous casting, slab thickness 90mm~110mm.
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 RE52Mn steel, it is special
Levy and be,
In the ESP producing lines, strand directly carries out hot rolling, and strand directly carries out hot rolling, wherein, roughing inlet temperature is 930
~980 DEG C, the temperature of sensing heating outlet is 1150~1180 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 RE52Mn steel, it is special
Levy and be,
The thickness of the hot-strip is 1.2~3.5mm.
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 RE52Mn steel, it is special
Levy and be,
The yield strength of the RE52MN steel of production be 450~500MPa, tensile strength be 740~800MPa, elongation percentage be 18~
22%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252028A (en) * | 2017-07-13 | 2019-01-22 | 鞍钢股份有限公司 | A kind of production method of high-carbon saw blade cold-rolled strip |
| CN110055466A (en) * | 2019-05-21 | 2019-07-26 | 安徽工业大学 | The preparation method of hot rolling high-strength medium managese steel of the strength and ductility product greater than 30GPa% |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011421A (en) * | 2016-06-06 | 2016-10-12 | 日照宝华新材料有限公司 | Method for producing thin-specification S500MC steel based on ESP thin slab continuous casting and rolling process |
| CN106048176A (en) * | 2016-06-06 | 2016-10-26 | 日照宝华新材料有限公司 | Method for producing low-carbon hot-rolled TRIP steel based on ESP thin slab continuous casting and rolling process |
| CN106191680A (en) * | 2016-08-30 | 2016-12-07 | 日照宝华新材料有限公司 | The method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path |
-
2016
- 2016-12-30 CN CN201611261690.1A patent/CN106756561B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011421A (en) * | 2016-06-06 | 2016-10-12 | 日照宝华新材料有限公司 | Method for producing thin-specification S500MC steel based on ESP thin slab continuous casting and rolling process |
| CN106048176A (en) * | 2016-06-06 | 2016-10-26 | 日照宝华新材料有限公司 | Method for producing low-carbon hot-rolled TRIP steel based on ESP thin slab continuous casting and rolling process |
| CN106191680A (en) * | 2016-08-30 | 2016-12-07 | 日照宝华新材料有限公司 | The method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109252028A (en) * | 2017-07-13 | 2019-01-22 | 鞍钢股份有限公司 | A kind of production method of high-carbon saw blade cold-rolled strip |
| CN110055466A (en) * | 2019-05-21 | 2019-07-26 | 安徽工业大学 | The preparation method of hot rolling high-strength medium managese steel of the strength and ductility product greater than 30GPa% |
| CN110055466B (en) * | 2019-05-21 | 2020-10-20 | 安徽工业大学 | Preparation method of hot-rolled high-strength medium manganese steel with strength-elongation product of more than 30GPa% |
| CN110904319A (en) * | 2019-12-23 | 2020-03-24 | 新余钢铁股份有限公司 | Manufacturing process of high-carbon tool steel SK85 cold-rolled wide steel strip |
| CN114703416A (en) * | 2022-03-31 | 2022-07-05 | 江苏沙钢集团有限公司 | 50 steel hot rolled plate and production method thereof |
| CN114703416B (en) * | 2022-03-31 | 2023-10-24 | 江苏沙钢集团有限公司 | 50 steel hot rolled plate and production method thereof |
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