CN106834886A - The method that Thin Specs RE65Mn steel is produced based on ESP bar strip continuous casting and rolling flow paths - Google Patents
The method that Thin Specs RE65Mn steel is produced based on ESP bar strip continuous casting and rolling flow paths Download PDFInfo
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- CN106834886A CN106834886A CN201611261696.9A CN201611261696A CN106834886A CN 106834886 A CN106834886 A CN 106834886A CN 201611261696 A CN201611261696 A CN 201611261696A CN 106834886 A CN106834886 A CN 106834886A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
The present invention provides a kind of method that Thin Specs RE65Mn steel is produced based on ESP bar strip continuous casting and rolling flow paths, including：Selection raw material, raw material include by mass percentage：0.64~0.66% C, 0.19~0.28% Si, 0.90~0.97% Mn, 0.16~0.18% Cr ,≤0.0040% S ,≤0.0012% P ,≤0.10% Ni ,≤0.10% Cu；Raw material are carried out converter smelting, the refining of LF stoves successively；The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be refined 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 using section cooling air cooling mode, it is coiled strip steel to be batched subsequently into coiling machine, outbound after coiled strip steel slow cooling.Using the present invention, solve production process and there are problems that the stability of ladle chemistry poor, strand element segregation serious, surface of steel plate decarburization layer depth, board dimension low precision, stability difference etc. and traditional hot rolling high cost, energy consumption.
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 RE65Mn 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.
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.With every profession and trade production technology
The high speed of development, the maximization of saw blade specification, and sawing operation, the obdurability and impact resistance of material seem heavy all the more
Will.65Mn steel is the main material that Now Domestic produces all kinds of saw blades, with low cost, specification wide, easy heat treatment, stable performance
The advantages of, saw blade production field still has irreplaceable status at home so far.The steel grade belongs to Fine Steel Casting iron, can both do
Into single hardness saw blade, it is also possible to do hardness saw blade in pairs, can after heat treatment obtain good comprehensive mechanical performance.
65Mn steel production technology is main with traditional heavy slab hot continuous rolling production technology both at home and abroad at present, and production process has steel
The stability of Hydrochemical Composition is poor, strand element segregation is serious, surface of steel plate decarburization layer depth, board dimension low precision, performance are steady
Qualitative poor the shortcomings of, these problems directly affects the quality problem of operation heat treatment process after steel plate, cause steel plate annealing or
Steel plate annealing nodularization is incomplete after modifier treatment or the problems such as uneven quenching hardness.
Regarding to the issue above, the present invention proposes a kind of based on ESP bar strip continuous casting and rolling flow paths production Thin Specs
The method of RE65Mn 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 RE65Mn steel, with solve Conventional process exist ladle chemistry stability is poor, strand element segregation is tight
Weight, surface of steel plate decarburization layer depth, board dimension low precision, stability difference etc. and traditional hot rolling high cost, energy consumption are big etc.
Problem.
The present invention provides a kind of method that Thin Specs RE65Mn 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：0.64~0.66% C, 0.19~0.28%
Si, 0.90~0.97% Mn, 0.16~0.18% Cr ,≤0.0040% S ,≤0.0012% P ,≤0.10%
Ni ,≤0.10% Cu, remaining is ferro element；
Raw material are carried out converter smelting, the refining of LF stoves successively；
The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be refined 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；
Using the section cooling cooling hot-rolled strip of air cooling mode, 640~740 DEG C are cooled to, are batched subsequently into coiling machine
It is coiled strip steel, outbound after coiled strip steel slow cooling.
Furthermore it is preferred that scheme be, in ESP producing lines, 3.5~6.0m/min of pulling speed of continuous casting, slab thickness 90~
110mm。
Furthermore it is preferred that scheme be, in ESP producing lines, roughing inlet temperature be >=950 DEG C, sensing heating outlet temperature
Spend is 1100~1180 DEG C.
Furthermore it is preferred that scheme be that the thickness of hot-strip is 1.5~3.5mm.
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 RE65Mn steel, strand is not required to soaking stove heat Direct Rolling under pulling rate high, and the technological process of production is short, belongs to low energy consumption green
Color manufacturing process category, the hot-rolled product skin decarburization mild degree produced, properties of product stabilization, dimensional tolerance are small, hot rolling
State can reach 1.5mm Ultra-thin bands, can reduce cold rolling process rolling pass, reach " with Bao Daihou " energy-saving mesh
's.
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 RE65Mn steel based on ESP bar strip continuous casting and rolling flow paths according to the embodiment of the present invention
Method flow schematic diagram.
Identical label indicates similar or corresponding feature or function in all of the figs.
Specific embodiment
In the following description, for purposes of illustration, in order to provide the comprehensive understanding to one or more embodiments, explain
Many details are stated.It may be evident, however, that these embodiments can also be realized in the case of without these details.
The problems such as traditional hot rolling cost high energy consumption for foregoing proposition is big, the present invention proposes a kind of based on ESP thin plates
Continuous-casting tandem-rolling flow produce Thin Specs RE65Mn steel method, using this method can low production RE65Mn steel saw blades cost,
Meet properties of product stabilization, the requirement that dimensional tolerance is small, service life is high.
Wherein, ESP (Endless Strip Production, strip production without a head) producing line, is newly-built new of AVM hereinafter enlightening
Generation sheet billet continuous casting and rolling production line, once being cast due to it can produce a whole piece steel band, the no any cutting head cutting tail in centre,
Thus have the advantages that Total continuity strip is produced, wall scroll continuous casting line has the big band broadband of outstanding production capacity, large-scale production
The features such as steel and quality strip steel, the conversion cost from molten steel to hot rolled coil are low, production-line technique arrangement is the compactest.
Specific embodiment of the invention is described in detail below with reference to accompanying drawing.
In order to illustrate the side that Thin Specs RE65Mn 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 RE65Mn 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 RE65Mn 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：0.64~0.66% C, 0.19~
0.28% Si, 0.90~0.97% Mn, 0.16~0.18% Cr ,≤0.0040% S ,≤0.0012% P ,≤
0.10% Ni ,≤0.10% Cu, remaining is ferro element；
S120：Raw material are carried out converter smelting, the refining of LF stoves successively；
S130：The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be refined 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 down using section cooling air cooling mode, 640~740 DEG C is cooled to, subsequently into coiling machine
Batch, outbound after coiled strip steel slow cooling.
Above-mentioned steps are the specific method using ESP Process Production RE65Mn steel, present invention production Thin Specs RE65Mn 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 → ESP continuous casting and rollings → batch → slow cooling → finished product.
In step S110 of the invention, in the raw material selection for generating low RE65Mn steel, contents of the C in raw material
For：0.64~0.66%, C element is the main element for ensureing the strength of materials, hardness and wearability, and medium and high carbon steel requirement has
Intensity and fatigue limit higher, typically all by being used in the state of quenching+average tempering, to obtain elasticity higher
The limit and toughness.To ensure the intensity of steel, enough carbon must be contained in medium and high carbon steel, to ensure the yield strength of material, resist
The indices such as tensile strength, hardness can meet the requirements.Carbon forms solid solution in being dissolved in steel, serves solution strengthening
Effect, is the main intensified element in steel.When it can combine to form Carbide Precipitation together with carbide, play
The effect of precipitation strength, carbon is the element maximum to the intensity contribution of steel, is also to influence the elasticity attenuation resistance of steel maximum
Element.Therefore C content control in the present invention is in C：0.64%~0.66%.
Contents of the Si in raw material be：In addition to the intensity that can improve steel, Si can improve horse for 0.19~0.28%, Si
The stability of retained austenite between family name's body lath, while the temperature range that the Low-Temperature Temper Brittleness for also improving steel occurs, weighs very much
What is wanted is that silicon can prevent Carbon diffusion, delays the precipitation and accumulation of cementite, improves the stability of martensite, therefore can be effective
The anti-temper softening ability for improving steel allows developed steel to be tempered at a higher temperature, is conducive to raising Heat-Treatment of Steel to fit
Should be able to power.Therefore Si contents control in the present invention is 0.19%~0.28%.
Contents of the Mn in raw material be：The maximum effect of 0.90~0.97%, Mn is to improve the quenching degree of steel, while
It is important solution strengthening element.Manganese is carbide former, can also be existed with solid solution condition, also with refinement pearlite group
The effect knitted, thus the intensity and hardness of ferrite austenite can be improved.Mn also has one to the anti-temper softening ability for improving steel
Fixed effect, but Mn contents it is higher when have the tendency of coarsened grain and increase temper brittleness, bring difficulty to processing.Therefore in this hair
Bright middle Mn contents control is 0.90%~0.97%.
Contents of the Cr in raw material be：0.16%~0.18%, Cr element can reduce the activity of carbon in steel, be again strong carbon
Compound formation element, chromium is the quenching degree that can significantly improve steel, and the effect shared with manganese can be more preferable, can mitigate the decarburization of steel
Tendency, improves the activation energy of carbon spread in steel.Therefore Cr contents control in the present invention is 0.16%~0.18%.
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 >=950 DEG C, and middle base is entering
Initially entered before mm finishing mill unit in induction heater, (sensing heating outlet temperature is 1100~1180 DEG C to IH, from induction heater
Out enter 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 the actual requirements,
Different parameters are set in generation equipment, so as to generate the RE65Mn steel of 1.5~3.5mm not equal thickness.
In an embodiment of the present invention, between the thickness and its yield strength, tensile strength of the RE65Mn steel of generation into anti-
Than if the thickness of the RE65Mn steel of generation is big, then its yield strength and tensile strength can reduce, if generation is low
The thickness of RE65Mn 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 RH stoves enters conticaster, with the pulling rate of 3.5~5.5m/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
1100~1180 DEG C are heated into induction heater, mm finishing mill unit is subsequently entered, hot-strip is out generated from mm finishing mill unit.
Hot-strip from mm finishing mill unit generation is by batching storage after section cooling.
In a word, ESP produces RE65Mn Thin Strip Steels completely without head continuous casting and rolling technique of sheet bar, and Molten Steel Cleanliness is high, into sub-control
System stabilization, casting blank solidification speed is fast, as-cast structure is more uniform, Segregation of Chemical Composition is small, and strand is realized straight without soaking stove heat
Casting is connect, strand is low in operation of rolling temperature, and rolling time is short, reduction in pass is big, help to reduce plate surface decarburization, thin
Change pearlite piece interlamellar spacing, can substantially eliminate component segregation, skin decarburization, tissue that traditional process production high-carbon strip is present
The problems such as unstable properties.ESP thickness of strand 90mm~110mm, ESP do not need threading completely without head casting and rolling process, heat
Roll the elongated thickness of volume uniformly, dimensional accuracy is high, stable performance, be conducive to improving the service life of saw blade product, hot rolling product is thick
Metric lattice reduce follow-up cold rolling process rolling pass up to 1.5mm, reduce cold rolling process production cost.
The present invention produces hot rolling Thin Specs RE65Mn steel using ESP completely without head bar strip continuous casting and rolling flow path, can stablize and roll
System production 1.5mm~3.5mm Thin Specs hot-rolling high-strength steels, the elongated thickness of hot rolled coil is uniform, and stable performance, metallographic structure is Soxhlet
Body, pearlite, ferrite.Very thin hot-rolled band can be produced using this technique, follow-up cold rolling process rolling pass can be reduced, reached
To the purpose that " with Bao Daihou " is energy-saving, with economic results in society very high, strand without soaking stove heat Direct Rolling,
The technological process of production is short, energy saving, reduces CO2 emission, belongs to low energy consumption green steel and iron manufacturing process regime.
According to the method for above-mentioned generation RE65Mn steel, the present invention is further described according to examples below.
Embodiment 1
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.64%, Si：0.22Wt%, Mn：0.92Wt%, Cr：0.018Wt%, P：0.010Wt%, S：0.0020Wt%, Cu：
0.0060Wt%, Ni：0.005Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
22 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 4.9m/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 coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 1：
Table 1
Embodiment 2
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.65%, Si：0.25Wt%, Mn：0.93Wt%, Cr：0.017Wt%, P：0.011Wt%, S：0.0015Wt%, Cu：
0.0060Wt%, Ni：0.0050Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
20 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, 970 DEG C of roughing inlet temperature, 940 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 1.6mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 850 DEG C；
Steel band is air cooled to 710 DEG C through laminar flow section, it is coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 2：
Table 2
Embodiment 3
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.66%, Si：0.23Wt%, Mn：0.94Wt%, Cr：0.017Wt%, P：0.009Wt%, S：0.0022Wt%, Cu：
0.0060Wt%, Ni：0.005Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
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 1160 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 1.8mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 840 DEG C；
Steel band is air cooled to 710 DEG C through laminar flow section, it is coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 3：
Table 3
Embodiment 4
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.66%, Si：25Wt%, Mn：0.94Wt%, Cr：0.017Wt%, P：0.010Wt%, S：0.0020Wt%, Cu：
0.0060Wt%, Ni：0.005Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
20 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, 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 840 DEG C；
Steel band is air cooled to 700 DEG C through laminar flow section, it is coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 4：
Table 4
Embodiment 5
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.65%, Si：0.25Wt%, Mn：0.95Wt%, Cr：0.018Wt%, P：0.010Wt%, S：0.0022Wt%, Cu：
0.0060Wt%, Ni：0.005Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
22 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, 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 2.5mm 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 coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 5：
Table 5
Embodiment 6
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.66%, Si：0.26Wt%, Mn：0.96Wt%, Cr：0.017Wt%, P：0.010Wt%, S：0.0023Wt%, Cu：
0.0060Wt%, Ni：0.005Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
23 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, 950 DEG C of roughing inlet temperature, 920 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 7 passage finish rolling
At 820 DEG C；
Steel band is air cooled to 700 DEG C through laminar flow section, it is coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 6：
Table 6
Embodiment 7
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.65%, Si：0.27Wt%, Mn：0.97Wt%, Cr：0.017Wt%, P：0.010Wt%, S：0.0020Wt%, Cu：
0.0060Wt%, Ni：0.005Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
23 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, 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 3.5mm 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 coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 7：
Table 7
Embodiment 8
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.66%, Si：0.28Wt%, Mn：0.90Wt%, Cr：0.016Wt%, P：0.009Wt%, S：0.0021Wt%, Cu：
0.0050Wt%, Ni：0.004Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 3.5m/min, slab thickness 90mm；
Strand is rolled through three passage roughing, 960 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
To be controlled at 1100 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 2.5mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 810 DEG C；
Steel band is air cooled to 640 DEG C through laminar flow section, it is coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 8：
Table 8
Embodiment 9
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.64%, Si：0.20Wt%, Mn：0.91Wt%, Cr：0.018Wt%, P：0.008Wt%, S：0.0023Wt%, Cu：
0.0040Wt%, Ni：0.003Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 5.0m/min, slab thickness 110mm；
Strand is rolled through three passage roughing, 970 DEG C of roughing inlet temperature, 980 DEG C of roughing outlet temperature；
To be controlled at 1160 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 2.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 870 DEG C；
Steel band is air cooled to 740 DEG C through laminar flow section, it is coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 9：
Table 9
Embodiment 10
In embodiment completely without head ESP bar strip continuous casting and rolling flow paths production RE65Mn steel technological process for mixed iron blast →
Molten iron pretreatment → BOF → LF → ESP continuous casting and rollings → batch → slow cooling → finished product.
The raw material such as the present embodiment molten iron, steel scrap carry out converter smelting, LF refining successively, and molten steel composition is controlled to：C：
0.65%, Si：0.24Wt%, Mn：0.97Wt%, Cr：0.017Wt%, P：0.007Wt%, S：0.0024Wt%, Cu：
0.00450Wt%, Ni：0.0045Wt%, remaining is Fe and inevitable impurity.
Through LF refining molten steel by ESP producing lines continuous castings, roughing, finish rolling, batch, retarded cooling process generation different-thickness
Hot-strip.
23 DEG C of the continuous casting working procedure control tundish degree of superheat, pulling rate 6.0m/min, slab thickness 100mm；
Strand is rolled through three passage roughing, 950 DEG C of roughing inlet temperature, 950 DEG C of roughing outlet temperature；
To be controlled at 1150 DEG C through the sensed stove heat of base product in the middle of roughing, induction furnace IH outlet temperatures；
Base in the middle of sensed heating is rolled into 2.0mm thickness hot-strips, exit temperature at finishing control through 5 passage finish rolling
At 850 DEG C；
Steel band is air cooled to 640 DEG C through laminar flow section, it is coil of strip to be batched subsequently into coiling machine；
By outbound after coil of strip slow cooling 48 hours.
The performance of the RE65Mn steel of generation is as shown in table 10：
Table 10
It should be noted that floating of the RE65Mn steel of above-described embodiment generation on thickness is very small can ignore not
Meter, yield strength and tensile strength have fluctuating for 30MPa, illustrate hereby in the present invention.
The thin based on the production of ESP bar strip continuous casting and rolling flow paths of present invention offer can be seen that by above-mentioned implementation method
The method of specification RE65Mn steel, strand is not required to soaking stove heat Direct Rolling under pulling rate high, and the technological process of production is short, belongs to low energy
Consumption green manufacturing process regime, the hot-rolled product skin decarburization mild degree produced, properties of product stabilization, dimensional tolerance are small,
Hot-rolled state can reach 1.5mm Ultra-thin bands, can reduce cold rolling process rolling pass, reach " with Bao Daihou " energy-saving
Purpose.
Described in an illustrative manner above with reference to accompanying drawing according to proposed by the present invention based on ESP CSP streams
The method that journey produces Thin Specs RE65Mn steel.It will be understood by those skilled in the art, however, that proposed for the invention described above
The method that Thin Specs RE65Mn 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 (4)
1. it is a kind of based on ESP bar strip continuous casting and rolling flow paths produce Thin Specs RE65Mn steel method, it is characterised in that including：
Selection raw material, wherein, the raw material include by mass percentage：0.64~0.66% C, 0.19~0.28%
Si, 0.90~0.97% Mn, 0.16~0.18% Cr ,≤0.0040% S ,≤0.0012% P ,≤0.10%
Ni ,≤0.10% Cu, remaining is ferro element；
The raw material are carried out converter smelting, the refining of LF stoves successively；
The hot-strip that the molten steel to be formed generates different-thickness by ESP producing lines will be refined 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 down using section cooling air cooling mode, 640~740 DEG C are cooled to, batched subsequently into coiling machine
It is coiled strip steel, outbound after the coiled strip steel slow cooling.
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 RE65Mn steel, it is special
Levy and be,
In the ESP producing lines, 3.5~6.0m/min of pulling speed of continuous casting, 90~110mm of slab thickness.
3. as claimed in claim 1 to be based on the method that ESP bar strip continuous casting and rolling flow paths produce Thin Specs RE65Mn steel, it is special
Levy and be,
In the ESP producing lines, roughing inlet temperature is >=950 DEG C, and the temperature of sensing heating outlet is 1100~1180 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 RE65Mn steel, it is special
Levy and be,
The thickness of the hot-strip is 1.5~3.5mm.
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| CN107523749A (en) * | 2017-07-31 | 2017-12-29 | 日照钢铁控股集团有限公司 | Based on the method that cutter high-carbon steel is produced completely without head bar strip continuous casting and rolling flow path |
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| CN110358976A (en) * | 2019-08-22 | 2019-10-22 | 江苏沙钢集团有限公司 | High-carbon steel thin strip and production method thereof |
| CN111560565A (en) * | 2020-06-29 | 2020-08-21 | 江苏九天光电科技有限公司 | Production method of high-quality special steel thin steel strip for measuring instrument |
| CN113578963A (en) * | 2021-07-30 | 2021-11-02 | 日照钢铁控股集团有限公司 | Method for producing thin 45 steel by continuous casting and rolling production line |
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Inventor after: Qin Zhe Inventor after: Zheng Wanren Inventor after: Yu Changjiang Inventor after: Yu Yao Inventor after: Xie Jibiao Inventor after: Du Xien Inventor after: Wang Xuelun Inventor after: Qin Jianliang Inventor after: An Shouyong Inventor after: Sun Qingqiang Inventor after: Zheng Xutao Inventor after: Xie Guohai Inventor after: Liu Hongzhi Inventor after: Zhu Jingtao Inventor after: Wang Gang Inventor after: Di Lihua Inventor after: Yan Jinbao Inventor after: Luo Jifeng Inventor after: Sun Qing Inventor before: Qin Zhe Inventor before: Yu Changjiang Inventor before: Yu Yao Inventor before: Xie Jibiao Inventor before: Du Xien Inventor before: Wang Xuelun Inventor before: Qin Jianliang Inventor before: An Shouyong Inventor before: Sun Qingqiang Inventor before: Zheng Xutao Inventor before: Xie Guohai Inventor before: Liu Hongzhi Inventor before: Zhu Jingtao Inventor before: Di Lihua Inventor before: Yan Jinbao Inventor before: Luo Jifeng Inventor before: Sun Qing Inventor before: Zheng Wanren |
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Effective date of registration: 20190312 Address after: 276806 600 Binhai Road, Arashiyama District, Rizhao City, Shandong. Patentee after: Rizhao Steel Holding Group Co., Ltd. Address before: 276806 West of Xiamen Road, Yuquan Road, South of Steel City Avenue and North of Chemical Avenue, Lanshan Town, Rizhao City, Shandong Province Patentee before: RIZHAO BAOHUA NEW MATERIAL CO., LTD. |