CN106555124B - The preparation method of Gao Ge, high molybdenum ferritic stainless steel - Google Patents
The preparation method of Gao Ge, high molybdenum ferritic stainless steel Download PDFInfo
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
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- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
- C21C7/0685—Decarburising of stainless steel
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- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
Disclose the preparation method of ferritic stainless steel comprising following steps：A) in converter, just decarburization and alloying are carried out to molten iron, to obtain the first stainless steel molten steel；B) vacuum-oxygen decarbonizing (VOD) is carried out to the first stainless steel molten steel, to obtain the second stainless steel molten steel；And c) the second stainless steel molten steel is refined in the ladle refining furnace (LF), to obtain the ferritic stainless steel.The method production efficiency is high, at low cost, is suitble to industrialized production, and product quality is stablized.
Description
Technical field
The present invention relates generally to the smelting technique of stainless steel, more particularly to the preparation method of ferritic stainless steel.
Background technology
Ferritic stainless steel refers to chromium content in 11%-30%, has body-centered cubic crystal structure, in a state of use with
Stainless steel based on ferritic structure.Ferritic stainless steel can be divided into low chromium (11%-15%), middle chromium (16%- by chromium content
And Gao Ge (21%-30%) three classes 20%).Ferritic stainless steel has good formability, corrosion resistance and to stress corrosion
It is insensitive, it can be used under high chloride ion and high stress corrosive environment, be widely used in product, decoration, household electrical appliances and heat exchange
The fields such as device.
Super ferrite stainless steel is a kind of resource-conserving high performance material of the research and development seventies in last century, instead of titanium
The precious metals material such as material, super austenitic, copper alloy, is mainly used in marine environment.The stainless composition of steel of super ferrite is special
It puts and includes：Gao Ge (25%-30%), chromium are the corrosion proof essential elements for improving material；High molybdenum (1%-5%), molybdenum element carries
The ability of high ferritic stainless steel resistance to spot corrosion and crevice corrosion；A small amount of nickel (1%-4%), nickel element can improve ferritic stainless steel
Welding performance reduces brittle transition temperature；Low-carbon, nitrogen (C+N≤0.040%), carbon, nitrogen reduce ferritic stainless steel intergranular
Corrosive nature makes brittle transition temperature increase；Niobium or titanium stabilizedization element are added, the influence of carbon, nitrogen member is eliminated, improves material weldering
Connect performance.
It summarizes
The application relates in one aspect to the preparation method of ferritic stainless steel comprising following steps：
A) in converter, just decarburization and alloying are carried out to molten iron, to obtain the first stainless steel molten steel；
B) vacuum-oxygen decarbonizing (VOD) is carried out to the first stainless steel molten steel, to obtain the second stainless steel molten steel；And
C) the second stainless steel molten steel is refined in ladle refining furnace (LF), to obtain the ferrite not
Become rusty steel.
It is described in detail
In the following description, including certain concrete details to each disclosed embodiment to provide comprehensive reason
Solution.However, those skilled in the relevant art are not, it will be recognized that use one or more of these concrete details, and use other
Embodiment is still realized in the case of method, component, material etc..
Unless required otherwise in the application, in the whole instruction and appended claims, word " comprising ", " packet
Containing ", " containing " and " having " should be interpreted that meaning that is open, including formula, i.e., " include but not limited to ".
" embodiment " mentioned throughout the specification, " embodiment ", " in another embodiment " or " at certain
In a little embodiments " mean an at least embodiment include with described in the embodiment it is relevant with specific reference to element,
Structure or feature.Therefore, throughout the specification different location occur phrase " in one embodiment " or " in embodiment
In " or " in another embodiment " or " in certain embodiments " same embodiment need not be all referred to.In addition, specifically wanting
Element, structure or feature can combine in one or more embodiments in any suitable manner.
Definition
Herein, " ferrite " means interstitial solid solution of the carbon dissolution in α-Fe, with body-centered cubic lattic, often
It is indicated with symbol F.
Herein, " ferritic stainless steel " means that chromium content in 11%-30%, has body-centered cubic crystal structure,
Stainless steel under use state based on ferritic structure.
Herein, " Gao Ge, high molybdenum ferritic stainless steel " mean chromium content be 25%-30%, molybdenum content 1%-5%
Ferritic stainless steel.
Herein, " three deferrization water " mean dephosphorization, desiliconization, desulfurization molten iron.
Herein, " top and bottom complex blowing " mean from Converter top blowing oxygen while identical or different gas is blown by furnace bottom again
The converter steel making method to blow.
Herein, " ferrochrome " means the ferroalloy being mainly made of chromium and iron.
Herein, " high carbon ferro-chrome " means the carbon containing ferrochrome for 4%-8%.
Herein, " low-carbon ferrochromium " means the carbon containing ferrochrome for 0.15%-0.50%.
Herein, " electrolytic nickel " is meant using nickel made of electrolysis.
Herein, " molybdenum-iron " means the ferroalloy being mainly made of molybdenum and iron.
Herein, " ferrosilicon " means the ferroalloy being mainly made of iron and silicon.
Herein, " calcined magnesite ball " means the shield slag ingredient conditioning agent as splashing slag in converter.
Herein, " vacuum-oxygen decarbonizing (vacuum oxygen decarburization, VOD) " means vacuum item
To the Secondary Steelmaking Technology of molten steel oxygen decarburization under part.
Herein, " ladle refining furnace (ladle furnace, LF) " is meant for (such as electric arc furnaces, flat to first furnace
Stove, converter) institute's molten steel water is refined, and can adjust liquid steel temperature, and technique buffering meets the metallurgical equipment of continuous casting, tandem rolling.
Herein, " ladle free space " means the vertical range between the molten steel top of the slag and ladle upper edge.
Herein, " oxygen rifle height " means the vertical range between oxygen rifle oxygen outlet and molten steel face.
Herein, " microalloying " is meant is added a small amount of special alloying element, such as niobium, vanadium, titanium in steel, to carry
High performance technology.
Specific embodiment
The application relates in one aspect to the preparation method of ferritic stainless steel comprising following steps：
A) in converter, just decarburization and alloying are carried out to molten iron, to obtain the first stainless steel molten steel；
B) vacuum-oxygen decarbonizing (VOD) is carried out to the first stainless steel molten steel, to obtain the second stainless steel molten steel；And
C) the second stainless steel molten steel is refined in ladle refining furnace (LF), to obtain the ferrite not
Become rusty steel.
In certain embodiments, the ferritic stainless steel that the preparation method of the ferritic stainless steel of the application is prepared
Contain Cr 25.0%-30.0% based on weight percent, Mo 3.0%-4.2%, C+N≤0.035%, Cu≤0.20%, with
And Pb+0.02Sn≤0.005%, surplus are Fe and other inevitable impurity.
In certain embodiments, the ferritic stainless steel that the preparation method of the ferritic stainless steel of the application is prepared
Contain Cr 25%-30% based on weight percent, Mo 3.0%-4.2%, S≤0.002%, C+N≤0.035%, Al≤
0.05%, Si 0.20%-0.50%, Mn≤0.40%, P≤0.020%, Ni≤3.5%, Pb+0.02Sn≤0.005%, Cu
≤ 0.20%, surplus is Fe and other inevitable impurity.
Cr：The corrosion resistance of stainless steel is had a major impact, with the increase of chromium content, corrosion resistance increases, but its plasticity, tough
Property and cold formability reduce.Therefore, it is 25%-30% by Cr contents control in the ferritic stainless steel of the application.
Mo：Enrichment of the chromium in passivating film is remarkably promoted, corrosion resistance is significantly strengthened.Therefore, not by the ferrite of the application
The control of Mo contents is 3.0%-4.2% in rust steel.
S：Inevitable impurity element influences corrosion resisting property, is controlled as far as possible in low level.Therefore, by the application
Ferritic stainless steel in the control of S contents for no more than 0.002%.
C、N：It has a negative impact to the toughness of ferritic stainless steel, modeling-crisp transition temperature, corrosion resistance, controls as far as possible
In low level.Therefore, by the sum of C and N content control in the ferritic stainless steel of the application for no more than 0.035%.
Al：Suitable aluminium is added, increases deoxidation effect, but aluminium can improve brittle transition temperature.Therefore, by the iron of the application
Al content control is no more than 0.05% in ferritic stainless steel.
Si、Mn：As deoxidier, but brittle transition temperature can be improved.Therefore, by Si in the ferritic stainless steel of the application
Content is designed as 0.20%-0.50%, and the control of Mn contents is no more than 0.40%.
P：Inevitable impurity element is controlled as far as possible in low level.Therefore, by the ferritic stainless steel of the application
Middle P content control is no more than 0.020%.
Ni：Toughness is improved, brittle transition temperature is reduced, improves corrosion resistance, but to stress corrosion-susceptible.Therefore, will
The control of Ni contents is no more than 3.5% in the ferritic stainless steel of the application.
Pb、Sn、Cu：Have an adverse effect to hot-workability, is controlled as far as possible in low level.Therefore, by the application's
The control of Cu contents is to meet Pb+0.02Sn≤0.005% no more than 0.20%, Pb and Sn contents in ferritic stainless steel.
In certain embodiments, the illustrative examples that can be used in the converter of the application include but not limited to push up bottom to turn
Stove, top and bottom combined blown converter, electric arc furnaces and argon oxygen refine (AOD) stove.
In certain embodiments, the illustrative examples that can be used in the top and bottom combined blown converter of the application include top gun oxygen supply
And/or bottom rifle oxygen supply.
In certain embodiments, the intensity that can be used in the top gun oxygen supply of the application is about 180Nm3/min·t-
200Nm3/min·t。
In certain embodiments, the intensity that can be used in the bottom rifle oxygen supply of the application is about 30Nm3/min·t-35Nm3/
min·t。
In certain embodiments, the illustrative examples that can be used in the molten iron of the application include but not limited to dephosphorization
The molten iron of (0.010%-0.20%), desiliconization (≤0.10%), desulfurization (≤0.005%).
In certain embodiments, the exemplary hot metal composition that can be used in the application is：C 3.7%-4.3%, Si
0.01%-0.10%, Mn 0.01%-0.05%, P 0.010%-0.020%, S 0.005%-0.015%, surplus be Fe and
Other inevitable impurity.
In certain embodiments, the exemplary hot metal composition that can be used in the application is：C 3.8%, Si 0.05%,
Mn 0.02%, P 0.010%, S 0.014%, surplus are Fe and other inevitable impurity.
In certain embodiments, the exemplary hot metal composition that can be used in the application is：C 3.9%, Si 0.02%,
Mn 0.04%, P 0.011%, S 0.010%, surplus are Fe and other inevitable impurity.
Technical staff belonging to this field can calculate blowing oxygen quantity according to molten iron carbon and alloy carbon.Blowing oxygen quantity (m3)=
1.91*f* [iron water amount * molten iron carbon content+alloy amount * alloys carbon content], f is correction factor, mass unit kg.
In certain embodiments, alloy is added into molten iron to complete alloying.
In certain embodiments, the illustrative examples that can be used in the alloy of the application include but not limited to high carbon chromium
Iron, molybdenum-iron and ferrosilicon.
In certain embodiments, electrolytic nickel is added into molten iron to complete alloying.
In certain embodiments, electrolytic nickel is added into molten iron to complete alloying.
In certain embodiments, alloy and electrolytic nickel are added into molten iron to complete alloying.
In certain embodiments, high-chromium alloy is added into molten iron to complete alloying.
In certain embodiments, ferro-molybdenum is added into molten iron to complete alloying.
In certain embodiments, Antaciron is added into molten iron to complete alloying.
In certain embodiments, high carbon ferro-chrome, electrolytic nickel, ferrosilicon and molybdenum-iron are added into molten iron to complete alloy
Change.
In certain embodiments, according to component requirements, added into three deferrization water high carbon ferro-chrome, electrolytic nickel, ferrosilicon and
Molybdenum-iron, to complete alloying.
In certain embodiments, the duration of heat in converter is about 60min-80min.In certain embodiments,
The duration of heat in converter is about 70min-75min.
In certain embodiments, when the carbon content of stainless steel in converter reaches 0.9% to 1.2%, stop oxygen blast, profit
Decarburization is stirred with argon bottom-blowing.
In certain embodiments, chromium largely aoxidizes in order to prevent, and ferrosilicon is added after decarburization and auxiliary material carries out
Reduction and desulfurization.
The illustrative examples that can be used in the auxiliary material that the chromium in order to prevent of the application largely aoxidizes include but not limited to
Lime, fluorite, calcined magnesite ball.
In certain embodiments, temperature is about 1630 DEG C -1650 DEG C after can be used in the stove of the converter smelting of the application.
In certain embodiments, the tapping molten steel surface thickness of slag layer that can be used in the application is about 20mm-50mm.
In certain embodiments, the first stainless steel molten steel contains C 0.50%-0.80%, Si0.10%-0.20%, Mn
≤ 0.40%, S≤0.025%, Cr 25-30%, Mo 3.0%-4.2%, Ni≤3.5%, N≤0.025%, P≤
0.020%, surplus is Fe and other inevitable impurity.
In certain embodiments, the first stainless steel molten steel contains C 0.72%, Si 0.12%, Mn 0.08%, P
0.016%, S 0.016%, Cr 28.42%, Mo 3.86%, Ni 0.50%, N 0.0185%, surplus be Fe and it is other not
Evitable impurity.
In certain embodiments, the first stainless steel molten steel contains C 0.62%, Si 0.12%, Mn 0.09%, P
0.016%, S 0.018%, Cr 27.15%, Mo 3.81%, Ni 2.29%, N 0.0193%, surplus be Fe and it is other not
Evitable impurity.
In certain embodiments, in top and bottom combined blown converter, decarburization is carried out, addition ferrosilicon, auxiliary material carry out deoxidation, take off
Sulphur.
In certain embodiments, the initial temperature that can be used in the vacuum-oxygen decarbonizing (VOD) of the application is about 1580
℃-1650℃。
In certain embodiments, the molten steel surface slag thickness that can be used in the vacuum-oxygen decarbonizing (VOD) of the application is about
20mm-50mm。
In certain embodiments, the ladle free space that can be used in the vacuum-oxygen decarbonizing (VOD) of the application is about
1250mm-1450mm。
In certain embodiments, the illustrative examples that can be used in the vacuum-oxygen decarbonizing (VOD) of the application include but
It is not limited to ladder oxygen blast.
Ladder oxygen blast technique is used in the preparation method of the application, can be improved decarbonization rate, be reduced chromium oxidation.
In certain embodiments, the ladder oxygen blast that can be used in the application includes four-stage.
In certain embodiments, in the ladder oxygen blast of four-stage, first stage oxygen blast intensity is about 0.30Nm3/
min·t-0.33Nm3/ mint improves molten steel temperature to aoxidize the element silicon in steel.Oxygen-supplying amount=1.5*G* [Si], G
It is Metal Weight (kg).
In certain embodiments, in the ladder oxygen blast of four-stage, second stage oxygen blast intensity is about 0.40Nm3/
min·t-0.45Nm3/ mint, molten steel carbon content are down to 0.20%-0.25%, so as to quick carbon drop, denitrogenation.
In certain embodiments, in the ladder oxygen blast of four-stage, phase III oxygen blast intensity is about 0.35Nm3/
min·t-0.38Nm3/ mint, molten steel carbon content are down to 0.10%-0.15%.
In certain embodiments, in the ladder oxygen blast of four-stage, fourth stage oxygen blast intensity is about 0.30Nm3/
min·t-0.33Nm3/ mint, molten steel carbon content are down to 0.03%-0.05%.
In certain embodiments, stop oxygen blast when molten steel carbon content≤0.05%, it is de- then to carry out high vacuum boiling
Carbon, and argon bottom-blowing stirs.
In certain embodiments, the illustrative examples that can be used in the high vacuum of the application include but not limited to vacuum pressure
Power≤50Pa.
In certain embodiments, addition auxiliary material restores slag charge after high vacuum boiling decarburization, and argon bottom-blowing stirs.
In certain embodiments, it can be used in the exemplary reality of the auxiliary material added after the high vacuum boiling decarburization of the application
Example includes but not limited to lime, fluorite, ferrosilicon.
In certain embodiments, aluminium is added after restoring slag charge, and argon bottom-blowing stirs.
In certain embodiments, alloy is added after adding aluminium, to finely tune alloying component, and argon bottom-blowing stirs.
In certain embodiments, add the illustrative examples of alloy added after aluminium include but not limited to low-carbon ferrochromium,
Molybdenum-iron, electrolytic nickel.
In certain embodiments, the time that can be used in the argon bottom-blowing stirring of the application is at least about 5min.At certain
In a little embodiments, the time that can be used in the argon bottom-blowing stirring of the application is at least about 15min.In certain embodiments
In, the time that can be used in the argon bottom-blowing stirring of the application is at least about 20min.
In certain embodiments, the argon bottom-blowing stirring intensity that can be used in the application is about 0.005Nm3/min·t
To 0.020Nm3/min·t.In certain embodiments, the argon bottom-blowing stirring intensity that can be used in the application is about
0.008Nm3/ mint to 0.015Nm3/min·t.In certain embodiments, it can be used in the argon bottom-blowing stirring of the application
Intensity is about 0.010Nm3/ mint to 0.012Nm3/min·t。
In certain embodiments, the second stainless steel molten steel contains C≤0.010%, N≤0.020%, Mn≤0.20%, S
≤ 0.005%, P≤0.020%, Cr 25%-30%, Ni≤3.5%, Mo 3.0%-4.2%, 0.15%≤Si≤
0.35%, surplus is Fe and other inevitable impurity.
In certain embodiments, the second stainless steel molten steel contains C 0.008%, Si 0.29%, Mn 0.07%, P
0.016%, S 0.004%, Cr 28.55%, Mo 3.95%, Ni 0.50%, N 0.0143%, surplus be Fe and it is other not
Evitable impurity.
In certain embodiments, the second stainless steel molten steel contains C 0.009%, Si 0.21%, Mn 0.10%, P
0.017%, S 0.0023%, Cr 27.59%, Mo 3.64%, Ni 2.17%, N 0.0155%, surplus be Fe and it is other not
Evitable impurity.
In certain embodiments, the duration of heat in vacuum-oxygen decarbonizing (VOD) vacuum refining furnace is about 60min-
90min.In certain embodiments, the duration of heat in vacuum-oxygen decarbonizing (VOD) vacuum refining furnace is about 75min-
80min。
In certain embodiments, molten steel temperature is about 1600 DEG C -1650 DEG C after vacuum-oxygen decarbonizing (VOD) processing.
Converter molten steel is smelted in vacuum-oxygen decarbonizing (VOD) vacuum refining furnace, complete decarburization, denitrogenation, reduction,
Desulfurization controls the content of C+N below 0.035%.
In certain embodiments, aluminium is added into molten steel in ladle refining furnace (LF) to carry out depth deoxidation.
In certain embodiments, the stirring intensity that can be used in the depth deoxidation of the application is about 0.001Nm3/min·
t-0.010Nm3/min·t.In certain embodiments, the stirring intensity that can be used in the depth deoxidation of the application is about
0.005Nm3/min·t-0.008Nm3/min·t。
In certain embodiments, the mixing time that can be used in the depth deoxidation of the application is about at least 5min.At certain
In a little embodiments, the mixing time that can be used in the depth deoxidation of the application is about at least 10min.In certain embodiments
In, the mixing time that can be used in the depth deoxidation of the application is about 8min-15min.
In certain embodiments, calcium is added into molten steel in ladle refining furnace (LF) to carry out desulfurization.
In certain embodiments, the stirring intensity that can be used in the desulfurization of the application is about 0.001Nm3/min·t-
0.010Nm3/min·t.In certain embodiments, the stirring intensity that can be used in the desulfurization of the application is about 0.003Nm3/
min·t-0.005Nm3/min·t。
In certain embodiments, the mixing time that can be used in the desulfurization of the application is about at least 10min.In certain realities
It applies in scheme, the mixing time that can be used in the desulfurization of the application is about at least 15min.In certain embodiments, Neng Gouyong
In the mixing time of the desulfurization of the application be about 15min-20min.
In certain embodiments, according to the requirement of steel grade, Ni or Ti is added into molten steel.
In certain embodiments, it can be used in the mixing time into molten steel after addition Ni or Ti of the application about extremely
Few 5min.In certain embodiments, it can be used in the mixing time into molten steel after addition Ni or Ti of the application about extremely
Few 10min.In certain embodiments, can be used in the application into molten steel add Ni or Ti after mixing time be about
10min to 12min.
In certain embodiments, can be used in the application into molten steel add Ni or Ti after stirring intensity be about
0.001Nm3/min·t-0.010Nm3/min·t.In certain embodiments, it can be used in being added into molten steel for the application
Stirring intensity after Ni or Ti is about 0.003Nm3/min·t-0.005Nm3/min·t。
In certain embodiments, TiN etc. is removed after adding Nb or Ti into molten steel in ladle refining furnace (LF)
Field trash.
In certain embodiments, the ferritic stainless steel obtained after ladle refining furnace (LF) refining contains Cr 25%-
30%, Mo 3%-4.2%, S≤0.002%, C+N≤0.035%, Al≤0.05%, Nb 0.20%-0.40%, Ti
0.12%-0.20%, Si 0.20%-0.50%, Mn≤0.40%, P≤0.020%, Ni≤3.5%, Pb+0.02Sn≤
0.005%, Cu≤0.20%, surplus are Fe and other inevitable impurity.
In certain embodiments, the ferritic stainless steel obtained after ladle refining furnace (LF) refining contains C 0.010%,
Si 0.35%, Mn 0.08%, P 0.019%, S 0.012%, Cr 27.66%, Mo 3.75%, Ni 2.10%, N
0.0163%, Al 0.02%, Nb 0.35%, Ti 0.14%, surplus are Fe and other inevitable impurity.
In certain embodiments, the duration of heat in ladle refining furnace (LF) is about 60min-80min.
In certain embodiments, total oxygen content in the ferritic stainless steel obtained after ladle refining furnace (LF) refining
([O]Entirely) about≤30ppm.In certain embodiments, complete in the ferritic stainless steel obtained after ladle refining furnace (LF) refining
Oxygen content ([O]Entirely) about≤20ppm.In certain embodiments, the ferrite stainless obtained after ladle refining furnace (LF) refining
Entire oxygen content in the steel content ([O]Entirely) about≤10ppm.
In certain embodiments, non-metallic inclusion in the ferritic stainless steel obtained after ladle refining furnace (LF) refining
Size (being mingled with length) be about≤8 μm.In certain embodiments, the ferrite obtained after ladle refining furnace (LF) refining
The size (being mingled with length) of stainless nonmetallic inclusionsin steel is about≤5 μm.In certain embodiments, ladle refining furnace
(LF) size (being mingled with length) of non-metallic inclusion is about≤3 μm in the ferritic stainless steel obtained after refining.Certain
In embodiment, the size of non-metallic inclusion (is mingled in the ferritic stainless steel obtained after ladle refining furnace (LF) refining
Length) about≤1 μm.
In certain embodiments, after ladle refining furnace (LF) refining, molten steel temperature is adjusted, to carry out subsequent pour
Note.
In certain embodiments, the ingredient for pouring into sheet billet continuous casting is as follows：Cr 27.55%, Mo 3.68%, S
0.001%, C 0.011%, Ti 0.12%, Al 0.032%, Si 0.30%, Mn 0.10%, P 0.016%, Nb
0.26%, Ni 2.13%, Sn 0.003%, Pb 0.001%, Cu 0.01%, N 0.0172%, surplus be Fe and it is other not
Evitable impurity.
In certain embodiments, the ingredient for pouring into sheet billet continuous casting is as follows：Cr 29.15%, Mo 3.82%, S
0.001%, C 0.012%, Ti 0.16%, Al 0.02%, Si 0.32%, Mn 0.10%, P 0.018%, Nb
0.38%, Ni 0.46%, Sn 0.004%, Pb 0.001%, Cu 0.05%, N 0.0175%, surplus be Fe and it is other not
Evitable impurity.
The preparation method of ferritic stainless steel disclosed in the present application utilizes the advantage and feature control composition of each smelting equipment
And smelting cycle, to reach efficient, quality stability.Oxygen blast quickly removes molten iron and high carbon alloy in top and bottom combined blown converter
In carbon, using whole Argon reduce molten steel in nitrogen content.It is de- using vacuum oxygen in vacuum-oxygen decarbonizing (VOD)
Carbon, denitrogenation obtain extremely low carbon nitrogen content.Deep deoxidation, desulfurization, removal of inclusions are carried out in ladle refining furnace (LF), and complete
It is controlled at microalloying and temperature.The production efficiency of the preparation method is high, at low cost, is suitble to industrialized production, and product
Stable quality.
Hereinafter, the application will be explained in detail by following examples to more fully understand each side of the application
Face and its advantage.It will be appreciated, however, that embodiment below is non-limiting the certain realities for being simply used for illustrating the application
Apply scheme.
Embodiment
Embodiment 1
1. top and bottom combined blown converter carries out just decarburization and alloying
A) 47 tons of " three is de- " molten iron are blended into top and bottom combined blown converter, hot metal composition (mass percent) is C 3.8%, Si
0.05%, Mn 0.02%, P 0.010%, S 0.014%, surplus are Fe and other inevitable impurity；Temperature is 1310
℃；
B) oxygen decarburization
Top gun oxygen supply intensity is 183Nm3/ mint, bottom rifle oxygen supply intensity 32Nm3/ mint, total oxygen-supplying amount are
8293Nm3.During oxygen decarburization, alloy and slag former (lime, fluorite, calcined magnesite ball) is added batch-wise, additive amount is respectively：
34.8 tons of high carbon ferro-chrome, 1.8 tons of electrolytic nickel, 5.3 tons of molybdenum-iron, 2.0 tons of ferrosilicon, 1.35 tons of calcined magnesite ball, 5.9 tons of lime, fluorite
0.3 ton；
C) it taps
Before tapping and tapping process is to ladle argon-blown gas shielded, prevents molten steel nitrogen pick-up, temperature is 1690 DEG C before tapping, tapping
Ingredient is as follows：C 0.62%, Si 0.12%, Mn 0.09%, P 0.016%, S 0.018%, Cr 27.15%, Mo
3.81%, Ni 2.29%, N 0.0193%, surplus are Fe and other inevitable impurity；Temperature is 1650 DEG C after stove, steel
Liquid weight is 77.4 tons；
2. the decarburization of vacuum-oxygen decarbonizing (VOD) depth, denitrogenation
A) VOD initial temperatures are 1620 DEG C, and molten steel surface slag thickness is 40mm, and ladle free space is 1320mm, molten steel weight
Amount is 77.4 tons；
B) vacuum pressure reaches 17000Pa and starts oxygen blast, and first stage oxygen blast intensity is 0.32Nm3/ mint aoxidizes steel
Element silicon in liquid, argon bottom-blowing intensity are 0.005Nm3/ mint, oxygen-supplying amount 60Nm3；Second stage oxygen blast intensity is
0.43Nm3/ mint, molten steel carbon content are down to 0.24%；Phase III oxygen blast intensity is 0.36Nm3/ mint, molten steel carbon contain
Amount is down to 0.12%；Fourth stage oxygen blast intensity is 0.32Nm3/ mint, molten steel carbon content are down to 0.04%；Always blowing oxygen quantity is
948Nm3；
C) stop oxygen blast, high vacuum strong mixing boil decarburization 20min, vacuum pressure 40Pa, argon bottom-blowing stirring intensity
For 0.014Nm3/min·t；
D) reduction slag charge, the ferrosilicon additive amount such as addition lime, fluorite, ferrosilicon are 720kg after high vacuum boiling carbon, and lime adds
Dosage is 2540kg, and fluorite additive amount is 289kg, and argon bottom-blowing stirring intensity is 0.011Nm3/min·t；
E) after adding lime, fluorite, ferrosilicon 5min, aluminium 375kg/t is added, argon bottom-blowing stirring intensity is 0.009Nm3/
Mint stirs 5min；
F) low-carbon ferrochromium 942kg is added, terminates to be vacuum-treated after stirring 6min, thermometric, sampling analysis, molten steel temperature is
1645 DEG C, terminal ingredient is as follows：C 0.009%, Si 0.21%, Mn 0.10%, P 0.017%, S 0.0023%, Cr
27.59%, Mo 3.64%, Ni 2.17%, N 0.0155%, surplus are Fe and other inevitable impurity；
3. ladle refining furnace (LF) is handled
A) addition aluminium 50kg, niobium 415kg, stirring intensity 0.007Nm3/ mint, stirs 10min, and molten steel temperature is
1605℃；
B) titanium wire 480kg, stirring intensity 0.004Nm are added3/ mint stirs 10min；
C) sampling analysis, LF terminal ingredients are as follows：C 0.010%, Si 0.31%, Mn 0.10%, P 0.017%, S
0.001%, Ti 0.14%, Cr 27.53%, Mo 3.70%, Ni 2.16%, Nb 0.26%, N 0.0165%, Al
0.035%, Sn 0.003%, Pb 0.001%, Cu 0.01%, surplus are Fe and other inevitable impurity；
D) thermometric, molten steel temperature are 1546 DEG C, can meet pouring temperature；
Molten steel by above-mentioned process pours into sheet billet continuous casting, and ingredient is as follows：Cr 27.55%, Mo 3.68%,
S 0.001%, C 0.011%, Ti 0.12%, Al 0.032%, Si 0.30%, Mn 0.10%, P 0.016%, Nb
0.26%, Ni 2.13%, Sn 0.003%, Pb 0.001%, Cu 0.01%, N 0.0172%, surplus be Fe and it is other not
Evitable impurity, wherein strand [O]EntirelyFor 28ppm, non-metallic inclusion size is 3 μm.
Embodiment 2
1. top and bottom combined blown converter carries out just decarburization and alloying
A) 48 tons of " three is de- " molten iron are blended into top and bottom combined blown converter, hot metal composition (mass percent) is C 3.9%, Si
0.05%, Mn 0.02%, P 0.011%, S 0.015%, surplus are Fe and other inevitable impurity；Temperature is 1295
℃；
B) oxygen decarburization
Top gun oxygen supply intensity is 185Nm3/ mint, bottom rifle oxygen supply intensity are 33Nm3/ mint, total oxygen-supplying amount
7810Nm3.During oxygen decarburization, alloy and slag former (lime, fluorite, calcined magnesite ball) is added batch-wise, additive amount is respectively：
37.8 tons of high carbon ferro-chrome, 0.36 ton of electrolytic nickel, 5.24 tons of molybdenum-iron, 1.64 tons of ferrosilicon, 1.39 tons of calcined magnesite ball, 5.98 tons of lime,
0.5 ton of fluorite；
C) it taps
Before tapping and tapping process is to ladle argon-blown gas shielded, prevents molten steel nitrogen pick-up, 1675 DEG C of temperature before tapping, tapping at
Divide as follows：C 0.72%, Si 0.12%, Mn 0.08%, P 0.016%, S 0.016%, Cr 28.42%, Mo 3.86%,
Ni 0.50%, N 0.0185%, surplus are Fe and other inevitable impurity；Temperature is 1633 DEG C after stove, and molten steel weight is
75.4 tons；
2. the decarburization of vacuum-oxygen decarbonizing (VOD) depth, denitrogenation
A) VOD initial temperatures are 1589 DEG C, and molten steel surface slag thickness is 30mm, and ladle free space is 1430mm, molten steel weight
Amount is 75.4 tons；
B) vacuum pressure reaches 15000Pa and starts oxygen blast, and first stage oxygen blast intensity is 0.30Nm3/ mint aoxidizes steel
Element silicon in liquid, argon bottom-blowing intensity are 0.005Nm3/ mint, oxygen-supplying amount 56Nm3；Second stage oxygen blast intensity is
0.42Nm3/ mint, molten steel carbon content are down to 0.23%；Phase III oxygen blast intensity is 0.37Nm3/ mint, molten steel carbon contain
Amount is down to 0.11%；Fourth stage oxygen blast intensity is 0.31Nm3/ mint, molten steel carbon content are down to 0.03%.Total blowing oxygen quantity
1084Nm3；
C) stop oxygen blast, high vacuum strong mixing boil decarburization 25min, vacuum pressure 50Pa, argon bottom-blowing stirring intensity
For 0.015Nm3/min·t；
D) reduction slag charge, the ferrosilicon additive amount such as addition lime, fluorite, ferrosilicon are 690kg after high vacuum boiling carbon, and lime adds
Dosage is 2340kg, and fluorite additive amount is 265kg, and argon bottom-blowing stirring intensity is 0.012Nm3/min·t；
E) after adding lime, fluorite, ferrosilicon 5min, aluminium 420kg/t is added, argon bottom-blowing stirring intensity is 0.010Nm3/
Mint stirs 5min；
F) low-carbon ferrochromium 1025kg is added, terminates to be vacuum-treated after stirring 10min, thermometric, sampling analysis, molten steel temperature is
1610 DEG C, terminal ingredient is as follows：C 0.008%, Si 0.29%, Mn 0.07%, P 0.016%, S 0.004%, Cr
28.55%, Mo 3.95%, Ni 0.50%, N 0.0143%, surplus are Fe and other inevitable impurity；
3. ladle refining furnace (LF) is handled
A) addition aluminium 80kg, niobium 640kg, stirring intensity 0.008Nm3/ mint, stirs 12min, and molten steel temperature is
1594 DEG C, using electrode by molten steel heating to 1620 DEG C；
B) titanium wire 460kg, stirring intensity 0.004Nm are added3/ mint stirs 12min；
C) sampling analysis, LF terminal ingredients are as follows：C 0.012%, Si 0.33%, Mn 0.09%, P 0.018%, S
0.001%, Ti 0.18%, Cr 29.18%, Mo 3.81%, Ni 0.45%, Nb 0.39%, N 0.0163%, Al
0.03%, Sn 0.004%, Pb 0.001%, Cu 0.05%, surplus are Fe and other inevitable impurity；
D) thermometric, molten steel temperature are 1562 DEG C, can meet pouring temperature
Molten steel by above-mentioned process pours into sheet billet continuous casting, and ingredient is as follows：Cr29.15%, Mo 3.82%, S
0.001%, C 0.012%, Ti 0.16%, Al 0.02%, Si 0.32%, Mn 0.10%, P 0.018%, Nb
0.38%, Ni 0.46%, Sn 0.004%, Pb 0.001%, Cu 0.05%, N 0.0175%, surplus be Fe and it is other not
Evitable impurity, wherein strand [O]EntirelyFor 25ppm, non-metallic inclusion size is 4 μm.
From the foregoing it is appreciated that although the purpose for exemplary illustration describes specific embodiments of the present invention,
But under condit without departing from the spirit and scope of the present invention, technical staff described in this field can make various modifications or change
Into.These deformations or modification should all fall into the application scope of the appended claims.
Claims (8)
1. the preparation method of Gao Ge, high molybdenum ferritic stainless steel comprising following steps：
A) in converter, just decarburization and alloying are carried out to the molten iron of dephosphorization, desiliconization, desulfurization using top and bottom complex blowing mode, with
To the first stainless steel molten steel,
Nitrogen content in molten steel is reduced using whole Argon wherein in the converter,
The duration of heat wherein in the converter is 60min-80min,
The wherein described first stainless steel molten steel contains C 0.50%-0.80%, and Si 0.10%-0.20%, Mn≤0.40%, S≤
0.025%, Cr 25.0-30%, Mo 3.0%-4.2%, Ni≤3.5%, N≤0.025%, P≤0.020%, surplus Fe
And other inevitable impurity；
B) vacuum-oxygen decarbonizing VOD is carried out to the first stainless steel molten steel, to obtain the second stainless steel molten steel,
The wherein described vacuum-oxygen decarbonizing VOD is ladder oxygen blast, including four-stage, and first stage oxygen supply intensity is 0.30Nm3/
min·t-0.33Nm3/min·t；Second stage oxygen supply intensity is 0.40Nm3/min·t-0.45Nm3/min·t；Phase III
Oxygen supply intensity is 0.35Nm3/min·t-0.38Nm3/min·t；Fourth stage oxygen supply intensity is 0.30Nm3/min·t-
0.33Nm3/ mint,
The time of the wherein described vacuum-oxygen decarbonizing VOD is 60min-90min,
It is wherein based on weight percent, the second stainless steel molten steel contains C≤0.010%, N≤0.020%, Mn≤
0.20%, S≤0.005%, P≤0.020%, Cr 25%-30%, Ni≤3.5%, Mo 3.0%-4.2%, 0.15%≤Si
≤ 0.35%, surplus is Fe and other inevitable impurity；And
C) the second stainless steel molten steel is refined in ladle refining furnace LF, to obtain the Gao Ge, high molybdenum-iron element
Body stainless steel,
Aluminium is added to carry out depth deoxidation, in the ladle refining furnace LF into molten steel wherein in the ladle refining furnace LF
It is interior into molten steel add calcium to carry out desulfurization,
The wherein described refinement step includes microalloying, and microalloying is carried out using Nb and/or Ti,
The duration of heat wherein in the ladle refining furnace LF is 60min-80min；
Based on weight percent, the Gao Ge, high molybdenum ferritic stainless steel contain Cr25%-30%, and Mo 3%-4.2%, S≤
0.002%, C+N≤0.035%, Al≤0.05%, Nb 0.20%-0.40%, Ti 0.12%-0.20%, Si 0.20%-
0.50%, Mn≤0.40%, P≤0.020%, Ni≤3.5%, Pb+0.02Sn≤0.005%, Cu≤0.20%, surplus Fe
And other inevitable impurity.
2. the method as described in claim 1, wherein vacuum pressure≤50Pa in the vacuum-oxygen decarbonizing VOD.
3. method as claimed in claim 2, wherein vacuum pressure keeps at least 15min in the vacuum-oxygen decarbonizing VOD.
4. the method as described in claim 1, wherein total oxygen content ([O] in the high chromium, high molybdenum ferritic stainless steelEntirely)≤
30ppm。
5. method as claimed in claim 2, wherein total oxygen content ([O] in the high chromium, high molybdenum ferritic stainless steelEntirely)≤
30ppm。
6. method as claimed in claim 3, wherein total oxygen content ([O] in the high chromium, high molybdenum ferritic stainless steelEntirely)≤
30ppm。
7. the method as described in any claim in claim 1 to 6, wherein in the high chromium, high molybdenum ferritic stainless steel
Size≤8 μm of non-metallic inclusion.
8. the method for claim 7, wherein in the high chromium, high molybdenum ferritic stainless steel non-metallic inclusion size
≤5μm。
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| CN102392189A (en) * | 2011-11-16 | 2012-03-28 | 钢铁研究总院 | High-Cr ferrite stainless steel and manufacturing method thereof |
-
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| CN102392189A (en) * | 2011-11-16 | 2012-03-28 | 钢铁研究总院 | High-Cr ferrite stainless steel and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| VOD冶炼超纯铁素体不锈钢脱碳工艺的研究;邹勇;《炼钢》;20110228;第27卷(第1期);第56页 * |
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