CN106191680A - The method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path - Google Patents
The method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path Download PDFInfo
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- CN106191680A CN106191680A CN201610766506.2A CN201610766506A CN106191680A CN 106191680 A CN106191680 A CN 106191680A CN 201610766506 A CN201610766506 A CN 201610766506A CN 106191680 A CN106191680 A CN 106191680A
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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
- B21B1/466—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 non-continuous process, i.e. the cast being cut before rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- 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
- C21D2211/001—Austenite
-
- 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
- C21D2211/008—Martensite
Abstract
The present invention provides a kind of method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path, including selecting raw material, wherein, raw material includes by mass percentage: select raw material, wherein, raw material includes by mass percentage: the Nb 0.045～Cr of the Mn of the Si of the C of 0.10%, 0.20～0.6%, 1.2～2.0%, 0.1～1.0% ,≤the 0.05% ,≤S of the 0.05% ,≤P of 0.015%, remaining is ferrum element；Raw material is carried out successively converter smelting and LF stove is smelted；The molten steel smelting formation from LF stove is produced line through ESP and generates the hot-strip of different-thickness；Wherein, in ESP produces line, the temperature of finish rolling outlet is not less than 820 DEG C；Ratio needed for the ferrite in hot-strip and martensite is determined successively by cooling twice hot-strip.Utilize the present invention, solve conventional thermal and roll into the problems such as this high energy consumption is big, reach energy-conserving and environment-protective and reduce the purpose of cost.
Description
Technical field
The present invention relates to iron and steel technical field, more specifically, relate to a kind of raw based on ESP bar strip continuous casting and rolling flow path
The method producing DP600 steel.
Background technology
In recent years, along with persistently dropping of iron and steel market, iron and steel is constantly in slight diarrhea or without profit state, forces iron and steel producer
Having to inquire into Jiang Benzhi road, and the domestic current attention degree to environmental protection is strengthened further, environmental requirement is unprecedented strict again, because of
This process for producing steel and iron inquiring into fall environmental protection the most again has become as the road of the most necessary existence.
Make full use of ESP exploitation application new product and meet national general planning and sector planning, meet country's modulation wound phase
Close Policy Conditions, it is possible to meet technique modernization, equipment enlarging, production intensification, resource and energy circulationization, energy consumption minimum
Change, economic benefit optimized high start developing goal, for advancing steel industry energy-saving and emission-reduction and technological progress, promote enterprise
Transition and upgrade, scientific and technical innovation and product restructuring, all have and be of great significance.
Dual phase steel has low yield strength ratio, high initial manufacture hardening ratio, the coordinating of good intensity and plasticity, good shaping
The advantage such as performance and energy absorption, has been developed as a kind of Novel punching high-strength vehicle steel.
For solving the problems referred to above, the present invention proposes a kind of based on ESP bar strip continuous casting and rolling flow path production DP600 steel
Method.
Summary of the invention
In view of the above problems, it is an object of the invention to provide one and produce DP600 based on ESP bar strip continuous casting and rolling flow path
The method of steel, rolls into the problems such as this high energy consumption is big solving conventional thermal, reaches energy-conserving and environment-protective and reduces the purpose of cost.
The present invention provides a kind of method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path, including:
Selecting raw material, wherein, raw material includes by mass percentage: 0.045～the C of 0.10%, 0.20～0.6%
The Cr of the Mn of Si, 1.2～2.0%, 0.1～the 1.0% ,≤Nb of the 0.05% ,≤S of the 0.05% ,≤P of 0.015%, remaining is
Ferrum element；
Raw material is carried out successively converter smelting and LF stove is smelted；
The molten steel smelting formation from LF stove is produced line through ESP and generates the hot-strip of different-thickness；Wherein, produce at ESP
In line, the temperature of finish rolling outlet is not less than 820 DEG C；
Ratio needed for the ferrite in hot-strip and martensite is determined successively by cooling twice hot-strip；Wherein,
After first hot-strip being cooled to 700 DEG C～780 DEG C, and it is incubated 2～10s, makes the ferrite in hot-strip contain
Amount reaches ratio needed for DP600 steel；
The rapidest cooling hot-rolled strip steel, to 150 DEG C～250 DEG C DEG C, makes the martensite content in hot-strip reach
Ratio needed for DP600 steel.
Furthermore it is preferred that scheme be to produce in line at ESP, the temperature of roughing entrance is not less than 950 DEG C, senses heating exit
Temperature be not less than 1100 DEG C.
Furthermore it is preferred that scheme be that the thickness of hot-strip is 1.5～6.0mm.
Furthermore it is preferred that scheme be to generate during DP600 steel, C, Si, Mn, the Cr in raw material forms DP600
Martensite needed for steel.
Furthermore it is preferred that scheme be to generate during DP600 steel, needed for the Si in raw material forms DP600 steel
Ferrite.
Furthermore it is preferred that scheme be to generate during DP600 steel, C, Si, Mn, the Cr in raw material forms DP600
Austenite needed for steel.
Knowable to technical scheme above, what the present invention provided produces DP600 steel based on ESP bar strip continuous casting and rolling flow path
Method, use ESP technique to directly generate various thickness specification strip steel DP600 steel from continuous casting, it is possible to solve conventional thermal and roll into this
The problems such as high energy consumption is big, can either meet the generation technique demand of thin gauge strip, also are able to energy-conserving and environment-protective simultaneously and reduce production
Cost.
In order to realize above-mentioned and relevant purpose, one or more aspects of the present invention include will be explained in below and
The feature particularly pointed out in claim.Description below and accompanying drawing are described in detail some illustrative aspects of the present invention.
But, some modes in the various modes of the principle that only can use the present invention of these aspects instruction.Additionally, the present invention
It is intended to include all these aspect and their equivalent.
Accompanying drawing explanation
By with reference to below in conjunction with the explanation of accompanying drawing and the content of claims, and along with to the present invention more comprehensively
Understanding, other purpose of the present invention and result will be more apparent and should be readily appreciated that.In the accompanying drawings:
Fig. 1 is the method flow producing DP600 steel based on ESP bar strip continuous casting and rolling flow path according to the embodiment of the present invention
Schematic diagram.
The most identical label indicates similar or corresponding feature or function.
Detailed description of the invention
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 not having these details.
Conventional thermal for aforementioned proposition rolls into the problems such as this high energy consumption is big, and the present invention proposes a kind of based on ESP thin plate
Continuous-casting tandem-rolling flow process produces the method for DP600 steel, uses ESP technique to directly generate various thickness specification strip steel from continuous casting
DP600 steel, it is possible to solve conventional thermal and roll into the problems such as this high energy consumption is big, the generation technique need of thin gauge strip can either be met
Ask, also be able to energy-conserving and environment-protective simultaneously and reduce production cost.
Wherein, ESP (Endless Strip Production, strip steel without a head produce) produces line, is newly-built new of A Weidi
Generation sheet billet continuous casting and rolling production line, once casts due to it and can produce a whole piece steel band, and centre does not has any cutting head cutting tail,
Thus there is the advantage that Total continuity strip steel produces, wall scroll continuous casting line has outstanding production capacity, large-scale production big band broadband
Steel and quality strip steel, conversion cost from molten steel to hot rolled coil are low, production-line technique arranges the features such as the compactest.
Below with reference to accompanying drawing, the specific embodiment of the present invention is described in detail.
In order to the method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path that the present invention provides is described, Fig. 1 shows
Go out the method flow producing DP600 steel based on ESP bar strip continuous casting and rolling flow path according to embodiments of the present invention.
As it is shown in figure 1, the method based on ESP bar strip continuous casting and rolling flow path production DP600 steel that the present invention provides includes:
S110: select raw material, wherein, raw material includes by mass percentage: 0.045～the C of 0.10%, 0.20～
The Cr of the Mn of Si, 1.2～2.0%, 0.1～1.0% of 0.6% ,≤the Nb of 0.05% ,≤the S of 0.05% ,≤0.015%
P, remaining is ferrum element；
S120: raw material is carried out successively converter smelting and LF stove is smelted；
S130: the molten steel smelting formation from LF stove is produced line through ESP and generates the hot-strip of different-thickness；Wherein, exist
ESP produces in line, and the temperature of finish rolling outlet is not less than 820 DEG C；
S140: determine ratio needed for the ferrite in hot-strip and martensite successively by cooling twice hot-strip；
Wherein,
After first hot-strip being cooled to 700 DEG C～780 DEG C, and it is incubated 2～10s, makes the ferrite in hot-strip contain
Amount reaches ratio needed for DP600 steel；
The rapidest cooling hot-rolled strip steel, to 150 DEG C～250 DEG C DEG C, makes the martensite content in hot-strip reach
Ratio needed for DP600 steel.
Above-mentioned steps is to use the concrete grammar of ESP Process Production DP600 steel, in step S110 of the present invention, is giving birth to
During the raw material becoming low DP600 steel selects, the mass percent of C is 0.045-0.1%, mainly forms the geneva of requirement
Body and the intensity of guarantee steel.For other performance, such as weldability etc., it is desirable to limit C content below 0.1%, and C the lowest (<
0.02%) duplex structure then it is difficult to obtain.C is the important element improving the strength of materials, and the design of rational composition can ensure hot rolling
The serviceability of DP600 steel reduces production cost simultaneously.
Si ratio in raw material is 0.2-0.6%, ferrite former, and Si can expand α+γ district, makes critical
The temperature range that district processes is widened, and improves the processing performance of dual phase steel, is conducive to keeping the steady of the performances such as dual phase steel intensity, ductility
Qualitative and repeatability.Add the form of the austenite formed when Si can change critical zone heating, thus be readily obtained tiny all
The martensite of even distribution, it is ensured that dual phase steel obtains the good fit of good strengthening effect and intensity and ductility.Si or ferrum
The solution strengthening element of ferritic, it accelerates the carbon segregation to austenite, it is to avoid gap solution strengthening and can avoid cooling time thick
The generation of carbide, improves the extension property of dual phase steel；Si can also improve quenching degree..
Ratio shared in raw material for Mn is 1.0～2.0%, has the effect of solution strengthening, can expand γ district, reduces
γ → α phase transition temperature, crystal grain thinning, Mn can strongly postpone perlitic transformation, beneficially bainite and be formed, by conservative control,
Ms temperature can be reduced to below room temperature, improve remained austenite content further, but too high make grain coarsening, weaken the anti-of steel
Corrosive power, reduces welding performance.And Mn content increases, and can improve martensite quenching degree, be unfavorable for that elongation percentage improves.
Ratio shared in raw material for Cr is 0.1～1.0%, and Cr is austenite stabilizer element, especially mesophilic range
Stabilization is the strongest, and Cr is middle carbide, and it has stronger affinity with C atom, can hinder C atom
Diffusion, add Mn increase stability comprehensive function, significantly improve the quenching degree of steel, can not only strongly postpone perlitic transformation and
Bainite transformation, and it is interval to expand coiling temperature.Though Cr is weak solution strengthening element, but the cold energy excessively of austenite can be increased
Power, thus thinning microstructure, strengthened effect.In addition Cr can promote that carbon spreads to austenite, and can reduce ferritic bending
Take intensity, be more beneficial for obtaining the dual phase steel of low yield strength.
Ratio shared in raw material for Nb is≤0.05%, and C in crystal grain refinement, transformation behavior, austenite is enriched with by Nb
Play remarkable effect.In the Nb delayed heat deformation process of solid solution condition, static and dynamic recrystallization and austenite are to ferritic phase
Become, thus expand the temperature range between dynamic recrystallization final temperature and Ac3, for providing just in Unhydrated cement rolling
Profit.Nb with C and N is combined the tiny carbonitride of formation also can postpone recrystallization, stops ferrite crystal grain to be grown up, thus has strong
Refined crystalline strengthening effect and stronger precipitating reinforcing effect, but the Nb of excess can affect extension property.
In the step s 120, carry out converter according to the composition of above-mentioned (step S110), LF stove is smelted.It is to say, molten iron
Obtain the molten steel of required composition again through LF stove refine after converter smelting.Wherein, pneumatic steelmaking (converter
Steelmaking) it is with molten iron, steel scrap, ferroalloy as primary raw material, not by external energy, by the physical thermal of ferrum liquid itself
With chemical reaction produces heat and completes steelmaking process in converter between ferrum liquid component.Converter is mainly for the production of carbon steel, alloy
Steel and copper and mickel are smelted.
LF stove (ladle furnace) i.e. ladle refining furnace, is external refining equipment main during iron and steel produces.LF stove one
As refer to the refining furnace in steel industry, actual is exactly a kind of specific form of electric arc furnace.
In step s 130, in ESP produces line, strand enters the temperature of roughing entrance and cannot be below 950 DEG C, and intermediate blank exists
Initially entering in induction heater before entering mm finishing mill unit, (sensing heating exit temperature is not less than 1100 DEG C to IH, from sensing heating
Stove out enters mm finishing mill unit, and the temperature of finish rolling outlet is not less than 820 DEG C, and, in ESP produces line, according to actual need
Ask, generation equipment sets different parameters, thus generate the DP600 steel of 1.5～6.0mm not equal thickness.
In an embodiment of the present invention, the thickness of the DP600 steel of generation becomes anti-with between its yield strength, tensile strength
Ratio, if the thickness of the DP600 steel generated is big, then its yield strength and tensile strength can reduce, if the low DP600 generated
The thickness of steel is little, then its yield strength and tensile strength can increase.
Wherein it is desired to explanation, IH is sensing heating exit temperature, and induction heater is positioned at after rotating hub cuts, finish rolling
Position before machine, the effect of sensing heating is heating strip steel, it is ensured that final rolling temperature, it may also be said to be the temperature of regulation intermediate blank
Degree, depending on IH temperature is according to strip steel finish rolling requirement and consideration to strip steel surface quality, can cause final rolling temperature not less than a certain temperature
Close, then waste the energy higher than a certain temperature.
Wherein, in ESP produces line, the molten steel smelting out from LF stove enters conticaster, straight from conticaster strand out
Tap into and make intermediate blank into 3 frame roughing mills, be then passed through rocking shears, strand head wedge-shaped segment is carried out segmentation and cuts away, then
Strand enters piler (effect of piler is when equipment breaks down below, can roll off the production line at this piler).Normally
Directly passing through during rolling, intermediate blank is through rotary hub type flying shear crop end subsequently, is not less than 1100 subsequently into induction heater heating
DEG C, subsequently enter mm finishing mill unit, out generate hot-strip from mm finishing mill unit.From the hot-strip of mm finishing mill unit generation through two
Warehouse-in is batched after secondary cooling.
According to the method for above-mentioned generation DP600 steel, the present invention is further described according to examples below.
Embodiment 1
Selecting raw material, wherein, raw material includes by mass percentage: the C of 0.061%, the Si of 0.25%, 1.29%
Mn, the Cr of 0.30%, the Nb of 0.002%, the S of 0.001%, the P of 0.009%, remaining is ferrum element；
Raw material carries out converter smelting successively, LF stove is smelted；
By from LF stove smelt formed molten steel institute through ESP produce line generation different-thickness hot-strip, wherein, at ESP
Producing in line, exit temperature at finishing is not less than 820 DEG C；
After hot-strip is cooled to 700～780 DEG C, layer cold line is treated temperature 2～about 10s, generate certain proportion ferrum
Ferritic, is then rapidly cooled to about 150～250 DEG C, puts in storage subsequently into coiling machine rolling.
The yield strength of the DP600 steel generated: 369MPa, tensile strength: 628Mpa, elongation percentage: 21%.
Embodiment 2
Selecting raw material, wherein, raw material includes by mass percentage: the C of 0.055%, the Si of 0.24%, 1.26%
Mn, the Cr of 0.32%, the Nb of 0.002%, the S of 0.002%, the P of 0.008%, remaining is ferrum element；
Raw material carries out converter smelting successively, LF stove is smelted；
By from LF stove smelt formed molten steel institute through ESP produce line generation different-thickness hot-strip, wherein, at ESP
Producing in line, exit temperature at finishing is not less than 820 DEG C；
After hot-strip is cooled to 700～780 DEG C, layer cold line is treated temperature 2～about 10s, generate certain proportion ferrum
Ferritic, is then rapidly cooled to about 150～250 DEG C, puts in storage subsequently into coiling machine rolling.
The yield strength of the DP600 steel generated: 347MPa, tensile strength: 596Mpa, elongation percentage: 25%.
Embodiment 3
Selecting raw material, wherein, raw material includes by mass percentage: the C of 0.045%, the Si of 0.27%, 1.35%
Mn, the Cr of 0.50%, the Nb of 0.05%, the S of 0.003%, the P of 0.015%, remaining is ferrum element；
Raw material carries out converter smelting successively, LF stove is smelted；
By from LF stove smelt formed molten steel institute through ESP produce line generation different-thickness hot-strip, wherein, at ESP
Producing in line, exit temperature at finishing is not less than 820 DEG C；
After hot-strip is cooled to 700～780 DEG C, layer cold line is treated temperature 2～about 10s, generate certain proportion ferrum
Ferritic, is then rapidly cooled to about 150～250 DEG C, puts in storage subsequently into coiling machine rolling.
The yield strength of the DP600 steel generated: 344MPa, tensile strength: 597Mpa, elongation percentage: 25%.
Embodiment 4
Selecting raw material, wherein, raw material includes by mass percentage: the C of 0.075%, the Si of 0.35%, 1.45%
Mn, the Cr of 0.10%, the Nb of 0.004%, the S of 0.005%, the P of 0.010%, remaining is ferrum element；
Raw material carries out converter smelting successively, LF stove is smelted；
By from LF stove smelt formed molten steel institute through ESP produce line generation different-thickness hot-strip, wherein, at ESP
Producing in line, exit temperature at finishing is not less than 820 DEG C；
After hot-strip is cooled to 700～780 DEG C, layer cold line is treated temperature 2～about 10s, generate certain proportion ferrum
Ferritic, is then rapidly cooled to about 150～250 DEG C, puts in storage subsequently into coiling machine rolling.
The yield strength of the DP600 steel generated: 340MPa, tensile strength: 595Mpa, elongation percentage: 23.5%.
Embodiment 6
Selecting raw material, wherein, raw material includes by mass percentage: the C of 0.10%, the Si of 0.55%, 1.2%
Mn, the Cr of 0.60%, the Nb of 0.01%, the S of 0.002%, the P of 0.013%, remaining is ferrum element；
Raw material carries out converter smelting successively, LF stove is smelted；
By from LF stove smelt formed molten steel institute through ESP produce line generation different-thickness hot-strip, wherein, at ESP
Producing in line, exit temperature at finishing is not less than 820 DEG C；
After hot-strip is cooled to 700～780 DEG C, layer cold line is treated temperature 2～about 10s, generate certain proportion ferrum
Ferritic, is then rapidly cooled to about 150～250 DEG C, puts in storage subsequently into coiling machine rolling.
The yield strength of the DP600 steel generated: 347MPa, tensile strength: 612Mpa, elongation percentage: 21%.
Embodiment 7
Selecting raw material, wherein, raw material includes by mass percentage: the C of 0.061%, the Si of 0.6%, 1.5%
Mn, the Cr of 1.0%, the Nb of 0.05%, the S of 0.009%, the P of 0.015%, remaining is ferrum element；
Raw material carries out converter smelting successively, LF stove is smelted；
By from LF stove smelt formed molten steel institute through ESP produce line generation different-thickness hot-strip, wherein, at ESP
Producing in line, exit temperature at finishing is not less than 820 DEG C；
After hot-strip is cooled to 700～780 DEG C, layer cold line is treated temperature 2～about 10s, generate certain proportion ferrum
Ferritic, is then rapidly cooled to about 150～250 DEG C, puts in storage subsequently into coiling machine rolling.
The yield strength of the DP600 steel generated: 348MPa, tensile strength: 611Mpa, elongation percentage: 24%.
Embodiment 8
Selecting raw material, wherein, raw material includes by mass percentage: the C of 0.061%, the Si of 0.6%, 2.0%
Mn, the Cr of 1.0%, the Nb of 0.05%, the S of 0.05%, the P of 0.015%, remaining is ferrum element；
Raw material carries out converter smelting successively, LF stove is smelted；
By from LF stove smelt formed molten steel institute through ESP produce line generation different-thickness hot-strip, wherein, at ESP
Producing in line, exit temperature at finishing is not less than 820 DEG C；
After hot-strip is cooled to 700～780 DEG C, layer cold line is treated temperature 2～about 10s, generate certain proportion ferrum
Ferritic, is then rapidly cooled to about 150～250 DEG C, puts in storage subsequently into coiling machine rolling.
The yield strength of the DP600 steel generated: 365MPa, tensile strength: 626Mpa, elongation percentage: 23.5%.
Embodiment 9
Selecting raw material, wherein, raw material includes by mass percentage: the C of 0.061%, the Si of 0.25%, 1.2%
Mn, the Cr of 0.10%, the Nb of 0.003%, the S of 0.001%, the P of 0.009%, remaining is ferrum element；
Raw material carries out converter smelting successively, LF stove is smelted；
By from LF stove smelt formed molten steel institute through ESP produce line generation different-thickness hot-strip, wherein, at ESP
Produce exit temperature at finishing in line and be not less than 820 DEG C；
After hot-strip is cooled to 700～780 DEG C, layer cold line is treated temperature 2～about 10s, generate certain proportion ferrum
Ferritic, is then rapidly cooled to about 150～250 DEG C, puts in storage subsequently into coiling machine rolling.
The yield strength of the DP600 steel generated: 368MPa, tensile strength: 642Mpa, elongation percentage: 24%.
It is negligible it should be noted that the DP600 steel floating on thickness that generates of above-described embodiment is the least,
Yield strength and tensile strength all have fluctuating of 30MPa, the most hereby illustrate.Wherein, the specification of DP600 steel
For 1.5mm × 1250mm～6.0mm × 1250mm；Through above-described embodiment draw DP600 steel yield strength as shown in table 1,
Tensile strength and elongation percentage.
Table 1
By above-mentioned embodiment it can be seen that the present invention provide based on ESP bar strip continuous casting and rolling flow path produce
The method of DP600 steel, uses ESP technique to produce DP600 steel, uses ESP technique to directly generate various thickness specification band from continuous casting
Steel DP600 steel, it is possible to solve conventional thermal and roll into the problems such as this high energy consumption is big, the generation technique need of thin gauge strip can either be met
Ask, also be able to energy-conserving and environment-protective simultaneously and reduce production cost.
Describe in an illustrative manner above with reference to accompanying drawing according to the present invention propose based on ESP CSP stream
Journey produces the method for DP600 steel.It will be understood by those skilled in the art, however, that for the invention described above proposed based on ESP
Bar strip continuous casting and rolling flow path produces the method for DP600 steel, it is also possible to make various on the basis of without departing from present invention
Improve.Therefore, protection scope of the present invention should be determined by the content of appending claims.
Claims (6)
1. the method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path, it is characterised in that including:
Selecting raw material, wherein, described raw material includes by mass percentage: 0.045～the C of 0.10%, 0.20～0.6%
The Cr of the Mn of Si, 1.2～2.0%, 0.1～the 1.0% ,≤Nb of the 0.05% ,≤S of the 0.05% ,≤P of 0.015%, remaining is
Ferrum element；
Described raw material is carried out successively converter smelting and LF stove is smelted；
The molten steel smelting formation from described LF stove is produced line through ESP and generates the hot-strip of different-thickness；Wherein, described
ESP produces in line, and the temperature of finish rolling outlet is not less than 820 DEG C；
Ratio needed for the ferrite in described hot-strip and martensite is determined successively by hot-strip described in cooling twice；Its
In,
After first described hot-strip being cooled to 700 DEG C～780 DEG C, and it is incubated 2～10s, makes the ferrum element in described hot-strip
Body burden reaches ratio needed for DP600 steel；
Then the described hot-strip of cooling, to 150 DEG C～250 DEG C DEG C, makes the martensite content in described hot-strip reach rapidly
Ratio needed for DP600 steel.
2. the method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path as claimed in claim 1, it is characterised in that
In described ESP produces line, the temperature of roughing entrance is not less than 950 DEG C, and the temperature of sensing heating exit is not less than 1100 DEG C.
3. the method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path as claimed in claim 1, it is characterised in that
The thickness of described hot-strip is 1.5～6.0mm.
4. the method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path as claimed in claim 1, it is characterised in that
During generating DP600 steel, C, Si, Mn, the Cr in described raw material forms the martensite needed for DP600 steel.
5. the method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path as claimed in claim 1, it is characterised in that
During generating DP600 steel, the Si in described raw material forms the ferrite needed for DP600 steel.
6. the method producing DP600 steel based on ESP bar strip continuous casting and rolling flow path as claimed in claim 1, it is characterised in that
During generating DP600 steel, C, Si, Mn, the Cr in described raw material forms the austenite needed for DP600 steel.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106756560A (en) * | 2016-12-30 | 2017-05-31 | 日照宝华新材料有限公司 | The method that Thin Specs RE700L steel is produced based on ESP bar strip continuous casting and rolling flow paths |
| CN106756561A (en) * | 2016-12-30 | 2017-05-31 | 日照宝华新材料有限公司 | The method that Thin Specs RE52Mn steel is produced based on ESP bar strip continuous casting and rolling flow paths |
| CN107739799A (en) * | 2017-09-30 | 2018-02-27 | 日照宝华新材料有限公司 | Based on the method that SPFH590 steel is produced completely without head sheet continuous casting and rolling |
| CN108300940A (en) * | 2018-01-31 | 2018-07-20 | 日照钢铁控股集团有限公司 | A kind of sheet blank continuous casting low cost high-mouldability low-carbon al-killed clean steel process |
| CN108330389A (en) * | 2018-01-31 | 2018-07-27 | 日照钢铁控股集团有限公司 | One kind exempting from Calcium treatment calmness clean steel production technology |
| CN108950382A (en) * | 2018-06-25 | 2018-12-07 | 日照钢铁控股集团有限公司 | A method of continuous producing line production hot radical is plated without flower galvanized sheet based on output strip line without a head and acid |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106756560A (en) * | 2016-12-30 | 2017-05-31 | 日照宝华新材料有限公司 | The method that Thin Specs RE700L steel is produced based on ESP bar strip continuous casting and rolling flow paths |
| CN106756561A (en) * | 2016-12-30 | 2017-05-31 | 日照宝华新材料有限公司 | The method that Thin Specs RE52Mn steel is produced based on ESP bar strip continuous casting and rolling flow paths |
| CN106756560B (en) * | 2016-12-30 | 2018-11-06 | 日照钢铁控股集团有限公司 | The method for producing Thin Specs RE700L steel based on ESP bar strip continuous casting and rolling flow paths |
| CN106756561B (en) * | 2016-12-30 | 2019-02-22 | 日照宝华新材料有限公司 | Method based on ESP bar strip continuous casting and rolling flow path production thin gauge RE52Mn steel |
| CN107739799A (en) * | 2017-09-30 | 2018-02-27 | 日照宝华新材料有限公司 | Based on the method that SPFH590 steel is produced completely without head sheet continuous casting and rolling |
| CN108300940A (en) * | 2018-01-31 | 2018-07-20 | 日照钢铁控股集团有限公司 | A kind of sheet blank continuous casting low cost high-mouldability low-carbon al-killed clean steel process |
| CN108330389A (en) * | 2018-01-31 | 2018-07-27 | 日照钢铁控股集团有限公司 | One kind exempting from Calcium treatment calmness clean steel production technology |
| CN108950382A (en) * | 2018-06-25 | 2018-12-07 | 日照钢铁控股集团有限公司 | A method of continuous producing line production hot radical is plated without flower galvanized sheet based on output strip line without a head and acid |
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