CN109023023A - A kind of manufacturing method of rare-earth heat-resistant steel board - Google Patents
A kind of manufacturing method of rare-earth heat-resistant steel board Download PDFInfo
- Publication number
- CN109023023A CN109023023A CN201810988381.7A CN201810988381A CN109023023A CN 109023023 A CN109023023 A CN 109023023A CN 201810988381 A CN201810988381 A CN 201810988381A CN 109023023 A CN109023023 A CN 109023023A
- Authority
- CN
- China
- Prior art keywords
- rare
- electroslag
- slag
- earth
- consutrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
- 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
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of manufacturing method of rare-earth heat-resistant steel board, Rare earth heat-resistant steel first uses intermediate frequency furnace and AOD furnace to smelt consutrode, then through electroslag remelting, qualified electroslag slab is made, electroslag slab is most rolled into through milling train the plate of specified specification afterwards, when smelting by Rare-Earth Ce content control in consutrode 0.10%~0.15%, electroslag remelting is carried out with five yuan of electroslag slag systems, not only content of rare earth is stably and controllable in Electrode, esr process, and electroslag remelting plate blank can directly feed mill carry out being rolled into plate.Compared with the production of drift steel ingot, it is qualified can not only to guarantee plate chemical component, and due to the raising of ESR ingot Solidification Quality, product properties are also more excellent；In addition, eliminating the link of the preceding necessary first cogging of rolling, the production duration is shortened, there is good economic benefit.
Description
Technical field
The present invention relates to Rare earth heat-resistant steel technical fields, particularly relate to a kind of manufacturing method of rare-earth heat-resistant steel board.
Background technique
There are rare earth element the multiple beneficials such as cleaning molten steel, inclusion modification, refinement crystal grain, microalloying to make in steel
With the oxidation resistance of steel, elevated temperature strength and plasticity, fatigue life, corrosion resistance and crack resistance etc. can be obviously improved.But
Rare earth element is extremely active, and the factors such as recovery rate and deoxygenation of liquid steel degree, tapping temperature, addition opportunity are related, thus,
Content of rare earth is difficult accurately to control.
Major part rare earth steel is only the upper range for providing content of rare earth at present, and steel is added as trace mineral supplement in rare earth
In, for improving service performance.And Rare earth heat-resistant steel 253MA of the invention has clear area requirement (it is required that dilute in rare earth element
Native Ce content 0.03%~0.08%), and high-end 253MA plate is to obtain more preferably tissue and performance, is needed by electroslag remelting,
Rare earth element can further scaling loss so that its manufacture difficulty greatly improves again.
Patent " a kind of heat resisting steel and preparation method thereof " describes a kind of rare-earth heat-resistant of content of rare earth 0.05%~0.5%
Iron powder is first covered in rare earth particle surface by steel, completely cuts off air, then after addition deoxidation in molten steel, by receiving for rare earth element
Rate is improved to 99.3%, but Rare earth heat-resistant steel content of rare earth wider range that the patent is related to, and is easier to realize, is not also provided receipts
The specific method of yield stability contorting.
Patent " high performance corrosion-proof rare earth super strength dual-phase stainless steel and its smelting process " gives a kind of rare earth two-phase not
The smelting process of rust steel (Re≤0.2%) handles molten steel using Re-Mg-Ca when consutrode is smelted, and in electroslag remelting
Using ReO2: MgO:CaO:CaF2: Al2O3Five yuan of slag systems of=10%:10%:10%:50%:20% carry out remelting, and in electroslag remelting
It constantly is uniformly added into active Re-Mg-Ca reducing agent to slag bath, controls rare earth scaling loss, but in terms of practical metallurgical effect, deoxidation effect
Fruit is bad ([O]=30~50ppm), and content of rare earth fluctuates larger (Re=0.0096%~0.055%) in steel after electroslag, therefore only fits
Steel grade for having the upper limit to require rare earth, has the steel grade of upper and lower limits just to have great risk if it is to rare earth.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of manufacturing method of rare-earth heat-resistant steel board, not only in electrode
Smelt, content of rare earth is stably and controllable in esr process, and electroslag remelting plate blank can directly feed mill be rolled into
Plate.Compared with the production of drift steel ingot, it is qualified can not only to guarantee plate chemical component, and due to ESR ingot Solidification Quality
It improves, product properties are also more excellent；In addition, eliminating the link of the preceding necessary first cogging of rolling, the production duration is shortened,
With good economic benefit.
In order to achieve the above technical purposes, used technical solution is: a kind of manufacturing method of rare-earth heat-resistant steel board,
Rare earth heat-resistant steel first uses intermediate frequency furnace and AOD furnace to smelt consutrode, and then through electroslag remelting, qualified electroslag plate is made
Electroslag slab is most rolled into the plate of specified specification, the manufacturing method by base through milling train afterwards are as follows:
Step 1: consutrode is smelted using intermediate frequency furnace+AOD furnace, when smelting by Rare-Earth Ce content control in consutrode
Silicon metal pre-deoxidation is added 0.10%~0.15%, by 2.0~2.5Kg/t in system, and then plus the Al line of 1.0~1.5Kg/t is deeply de-
Oxygen adjusts Si in steel to 1.6%~1.7% before tapping, and [O] control is in 30ppm hereinafter, tapping temperature control is 1580 ± 10
DEG C, ladle first adds 1Kg/t SiAlBaCa alloy deoxidation when tapping, and the ingredient of SiAlBaCa alloy by weight percentage includes 35%
Then Rare-Earth Ce-La conjunction is added in Si, 10%Ca, 10%Ba, 12%Al, surplus Fe according to 60%~70% recovery rate into steel stream
Gold, the ingredient of Ce-La alloy by weight percentage include 62%~68%Ce, 32%~38%La, and Rare-Earth Ce target content is
0.12%；
Step 2: carry out electroslag remeltings with five yuan of electroslag slag systems, by comsumable melt speed control 340~360Kg/h in sight,
Whole Argon carries out gas shield, and according to the Al content in consutrode, by automatic charging equipment, according to 0.05% ~ 0.08%
Total Al content constantly to slag bath surface be added SiAlBaCa alloying pellet, deoxidation is diffused to slag, wherein five yuan of electroslags
Slag system includes 40% ~ 46%CaF by weight percentage2、12%CaO、12%Al2O3、10%MgO、20%~26%RExOy；
Step 3: electroslag remelting finishes to obtain electroslag remelting plate blank, after the secondary misting cooling of electroslag remelting plate blank, using milling train
Hot rolling is aligned again using straightener after hot rolling, obtains rare-earth heat-resistant steel board.
For the present invention when Ce content is in 0.10% ~ 0.12% in consutrode, slag system is respectively 40% using weight percent
CaF2、12% CaO、12% Al2O3、10% MgO、26%RExOy, when Ce content is in 0.125% ~ 0.135% in consutrode,
Slag system is respectively 44% CaF using weight percent2、12% CaO、12% Al2O3、10% MgO、22%RExOy, work as consutrode
When middle Ce content is in threshold level 0.14% ~ 0.15%, slag system is respectively 46% CaF using weight percent2、12% CaO、
12% Al2O3、10% MgO、20%RExOy。
The present invention is diffused deoxidation to slag in the electroslag remelting stage, using deoxidier SiAlBaCa alloy, before electroslag
Phase and mid-term are added according to 15g/5 ~ 18g/5min speed, and the electroslag feeding stage is added according to 10g/5min speed.
The beneficial effects of the present invention are: Rare earth heat-resistant steel 253MA hot rolled plate surface quality is good, without obvious pipe,
The defects of slag inclusion.According to GB/T 1979-2001 " structural steel macrostructure defect judge picture " standard, inside embodiment slab
Quality is detected, do not find loose, segregation, white band, rimhole, Residual hole, skull patch, white point, cracks in crystal boundary,
The defects of air entrapment, non-metallic inclusion and slag inclusion, Non-metallic inclusion object, steel ingot internal soundness is good.
Compared with prior art, the beneficial effects of the present invention are: being adopted first by research smelting process rare earth scaling loss rule
Deoxidization technique is smelted with suitable, produces the consutrode base for meeting internal control composition requirement；It is then based on slab electroslag remelting
Technology effectively controls the electroslag stage using electroslag remeltings parameters such as suitable five yuan of electroslag remelting slags, molten speed and deoxidation systems
Rare-earth oxidation scaling loss.It successfully produces chemical component and inside and outside is up-to-standard, 250 mm of sectional dimension × 1250mm, weight 6
Ton Rare earth heat-resistant steel 253MA electroslag remelting plate blank, the slab can directly feed mill be rolled into 1250mm × 35mm × L plate,
The hammer cogging process that common billet needs is saved, reduces about 3000 yuan/ton of production cost, and shortens the production week of plate
Phase has apparent economic benefit.
Specific embodiment
The composition range of Rare earth heat-resistant steel 253MA of the present invention are as follows: C0.05% ~ 0.10%, Si1.4% ~ 2.0%, Mn≤
0.8%, S≤0.03%, P≤0.045%, Cr20%~22%, Ni10% ~ 12%, Ce0.03%~0.08%, N0.14% ~ 0.20%.
253MA steel ingot is smelted using " intermediate frequency furnace+AOD furnace+electroslag remelting " mode, first produces chemical component, surface and inside
Up-to-standard electroslag slab, then direct feed mill is rolled into the plate of specified specification, specific as follows.
First, the abundant deoxidation of Electrode stage, mainly molten steel inhibits the scaling loss of Rare-Earth Ce, obtains stablizing recovery rate.
For this purpose, first reacting Rare-Earth Ce scaling loss by means of thermodynamic calculation method and carrying out theoretical calculation, show that rare earth scaling loss reaches balance
Ideal deoxygenation conditions requirement in oxygen content in steel, that is, steel when reaction.In practical smelting process, by continually changing temperature,
The factors such as ingredient, dynamic conditions influence, and balance can not be fully achieved, but calculated result can be provided to deoxidation control target
Foundation.
The control of Rare-Earth Ce recovery rate is to smelt the technical difficult points of Rare earth heat-resistant steel 253MA.
Theoretical calculation is carried out to Rare-Earth Ce deoxygenation firstly, introducing thermodynamic calculation method, it is anti-to solve Rare-Earth Ce deoxidation
When should balance in steel [O], reference is provided for control rare earth recovery rate, calculation of thermodynamics thinking is as follows:
(1) 253MA Exemplary chemical ingredient is set, and provides Ce, Al content；
Table 1 is 253MA typical composition (weight %)
(2) element interaction coefficient in steel is consulted, Ce, O activity coefficient calculating formula are listed；
Table 2 is activity interaction coefficient (T=1600 DEG C) in molten steel
(3) Ce, O activity coefficient are substituted into Rare-Earth Ce deoxygenation thermodynamical equilibrium equation, solves steel when thermodynamical reaction reaches balance
In [O].
Rare-Earth Ce oxidation equation formula in steel is as follows:
Formula (1)
Formula (2)
In formula,f [Ce]Indicate the activity coefficient of Ce,f [O]Indicate the activity coefficient of O.
Formula (3)
In formula,Indicate the interaction coefficient of Ce and element i.
When T=1600 DEG C, when Rare-Earth Ce oxidation reaction reaches balance:
Formula (5)
Formula (1)~formula (4) is substituted into formula (5) to calculate, solution show that Rare-Earth Ce is reacted with O in steel and reaches balance
When, [O]=0.0004(4ppm in steel), it is horizontal with current smelting, it is not possible to reach the target, but can be by deoxidation index
It is set to 30ppm hereinafter, reality considers recovery rate when smelting.
When Rare earth heat-resistant steel 253MA electrode A OD smelts, it is contemplated that subsequent electroslag remelting rare earth continues scaling loss, need to be by consumable
The control of Rare-Earth Ce content is 0.10%~0.15% in electrode.Firstly, 2.0 ~ 2.5Kg/t of additional amount will using silicon metal pre-deoxidation
Then plus the Al line deep deoxidation of 1.0~1.5Kg/t the control of Si content limits 1.5% ~ 1.6% in composition range, will be in steel before tapping
Si is adjusted to 1.6% ~ 1.7%, and [O] control is in 30ppm hereinafter, tapping temperature control ladle at 1570~1590 DEG C, tapping is first
Add 1Kg/t SiAlBaCa alloy (Si35%, Ca10%, Ba10%, Al12%, Fe surplus) deoxidation, then according to 60%~70% receipts
Rare-Earth Ce-La alloy (Ce62%~68%, La32%~38%), Rare-Earth Ce target content 0.12%, electrode are added into steel stream for yield
Specification 180mm × 1170mm × L, 6 ~ 8 tons of substance.
Second, the electroslag remelting stage uses sectional dimension for the fixed plate slab crystallizer of 250mm × 1250mm, for not
With the 253MA consutrode base of Ce content, for control Rare-Earth Ce element electroslag stage scaling loss and good inner and outer surfaces are obtained
Quality, using five yuan of 40%~46%CaF of electroslag remelting slag2、12%CaO、12%Al2O3, 10%MgO, 20%~26%RExOyIt carries out
Electroslag remelting.Wherein, the CaF in slag2Slag system fusing point, viscosity and surface tension can be reduced；Al2O3The resistance of slag system slag can be improved, slag is made
It is heating power fusing, CaO can improve slag system basicity, play desulfurization effect；MgO can reduce slag viscosity, improve slag flowing
Property, and half solidified slag film can be formed in slag surface, reduce gas infiltration.
By electrode melting speed control in 0.6DKnot~0.65DKnot, i.e. 340~360Kg/h, whole Argon progress gas guarantor
Shield, and according to the Al content in consutrode, by automatic charging equipment, according to 0.05% ~ 0.08% total Al content constantly to slag
Pool surface adds SiAlBaCa alloying pellet, is diffused deoxidation to slag, inhibits rare earth scaling loss.
Third, electroslag remelting finish to obtain electroslag remelting plate blank, carry out secondary misting cooling, slab to electroslag remelting plate blank
Specification be 250mm × 1250mm × 2500mm, about 6 tons of weight.
4th, electroslag remelting plate blank is packed into gas heating furnace, heating temperature 1180~1200 by the slab rolling stage
DEG C, keep the temperature 3~4h, using 3,500 4 roll reversing rollers carry out hot rolling, 1150~1180 DEG C of start rolling temperature, finishing temperature 900~
950 DEG C, mill product specification 1250mm × 35mm × L.
5th, it is aligned after the completion of rolling using 11 roller straighteners, guarantees plate face flatness 5mm/1000mm, aligning
Roller-way spraying cooling after the completion.
Embodiment 1:
When Ce content is in threshold level (0.10% ~ 0.12%) in consutrode, produced using the manufacturing method of the present invention dilute
Native heat resisting steel 253MA electroslag slab, comprising the following steps:
The first step smelts consutrode using " 8T intermediate frequency furnace+8TAOD furnace " mode, to realize the abundant deoxidation of molten steel, presses
Then plus the Al line deep deoxidation of 1.0Kg/t silicon metal pre-deoxidation is added in 2.0Kg/t, adjusts Si in steel to 1.6% before tapping,
[O] control is in 30ppm hereinafter, tapping temperature control ladle at 1580 ± 10 DEG C, tapping first adds 1Kg/t SiAlBaCa alloy
Then Rare-Earth Ce-La conjunction is added in (Si35%, Ca10%, Ba10%, Al12%, Fe surplus) deoxidation according to 2.8Kg/t into steel stream
Gold.
Electrode specification is 180mm × 1170mm × L, and about 6 tons of substance, electrode chemical component is met the requirements of the standard, such as the following table 3
It is shown.
Table 3 is 253MA electrode chemical component (weight %)
Second step polishes consutrode surface clean；
Third step prepares slag charge.Slag system uses CaF2、CaO、Al2O3、MgO、RExOyFive yuan of slag systems, the weight percent of each constituent element
Than being respectively 40%, 12%, 12%, 10%, 26%, quantity of slag 300kg.Slag charge is separated in merging electric furnace, temperature is controlled at 800 DEG C, is dried
It is 7 hours roasting；
Baked slag charge is added in slugging packet by the 4th step, striking slag making, and the slugging time about 80 minutes, slag temperature control system existed
1650 ~ 1700 DEG C, guarantees that slag system melts, changes clearly, 10 minutes before slugging furnace blowing out, 1kgAl pre-deoxidations are added into melt cinder；
Bottom water case is moved in crystallizer, is sealed by the 5th step, after consutrode and crystallizer centering, is raised up to crystallizer
Mouthful；
6th step, liquid slag is poured into crystallizer, and consutrode is inserted into slag bath, covers blowing argon cover, power transmission is opened
Beginning electroslag remelting, the voltage of equipment are set as 60V, and electric current is set as 16KA, and electrode melting speed is 340kg/h, electroslag remelting
Stage constantly adds the deoxidation of SiAlBaCa alloying pellet into slag bath, and speed is added according to 18g/5min, feeding in the electroslag remelting stage
Stage is according to 10g/5min；
7th step, electroslag remelting finish, and electroslag remelting plate blank are carried out secondary misting cooling, the specification of electroslag remelting plate blank is
250mm × 1250mm × 2500mm, about 6 tons of weight.
Chemical composition analysis is carried out to Rare earth heat-resistant steel 253MA electroslag remelting plate blank, as a result such as table 4, ingredient is complied with standard
It is required that Ce content is in threshold level (0.10% ~ 0.12%) in electrode.
Table 4 is 253MA electroslag slab chemical component (weight %)
Electroslag remelting plate blank is packed into heated by natural gas stove heating, 1180~1200 DEG C of heating temperature, keeps the temperature 3~4h by the 8th step,
Using 3,500 4 roll reversing rollers carry out hot rolling, 1150~1180 DEG C of rolling temperature, 900~950 DEG C of finishing temperature, mill product
Specification 35mm × 1250mm × L.
9th step is aligned after the completion of rolling using 11 roller straighteners, guarantees plate face flatness 5mm/1000mm, is rectified
Roller-way spraying cooling after the completion of straight.
Embodiment 2:
When in consutrode Ce content be in restrict water supply flat (0.125% ~ 0.135%) when, produced using the manufacturing method of the present invention
Rare earth heat-resistant steel 253MA electroslag slab, comprising the following steps:
The first step smelts consutrode using " 8T intermediate frequency furnace+8TAOD " mode, to realize the abundant deoxidation of molten steel, presses
Then plus the Al line deep deoxidation of 1.2Kg/t silicon metal pre-deoxidation is added in 2.2Kg/t, adjusts Si in steel to 1.65% before tapping,
[O] control is in 30ppm hereinafter, tapping temperature control ladle at 1580 ± 10 DEG C, tapping first adds 1Kg/t SiAlBaCa alloy
Then Rare-Earth Ce-La alloy is added in deoxidation according to 2.8Kg/t into steel stream.
Electrode specification is 180mm × 1170mm × L, and about 6 tons of substance, electrode chemical component is met the requirements of the standard, such as the following table 5
It is shown, in electrode Ce content be in restrict water supply flat (0.125% ~ 0.135%).
Table 5 is 253MA electrode chemical component (weight %)
Second step polishes consutrode surface clean；
Third step prepares slag charge.Slag system uses CaF2、CaO、Al2O3、MgO、RExOyFive yuan of slag systems, the weight percent of each constituent element
Than being respectively 44%, 12%, 12%, 10%, 22%, quantity of slag 300kg.Slag charge is separated in merging electric furnace, temperature is controlled at 800 DEG C, is dried
It is 7 hours roasting；
Baked slag charge is added in slugging packet by the 4th step, striking slag making, and the slugging time about 80 minutes, slag temperature control system existed
1650 ~ 1700 DEG C, guarantees that slag system melts, changes clearly, 10 minutes before slugging furnace blowing out, 1kgAl pre-deoxidations are added into melt cinder；
Bottom water case is moved in crystallizer, is sealed by the 5th step, after consutrode and crystallizer centering, is raised up to crystallizer
Mouthful；
6th step, liquid slag is poured into crystallizer, and consutrode is inserted into slag bath, covers blowing argon cover, power transmission is opened
Beginning electroslag remelting, the voltage of equipment are set as 60V, and electric current is set as 16KA, and electrode melting speed is 350kg/h, electroslag remelting
Stage constantly adds the deoxidation of SiAlBaCa alloying pellet into slag bath, and speed is added according to 17g/5min, feeding in the electroslag remelting stage
Stage is according to 10g/5min；
7th step, electroslag remelting finish, and electroslag remelting plate blank are carried out secondary misting cooling, the specification of electroslag remelting plate blank is
250mm × 1250mm × 2500mm, about 6 tons of weight.
Chemical composition analysis is carried out to Rare earth heat-resistant steel 253MA electroslag remelting plate blank, as a result such as table 6, ingredient is complied with standard
It is required that.
Table 6 is 253MA electroslag slab chemical component (weight %)
Electroslag remelting plate blank is packed into heated by natural gas stove heating, 1180~1200 DEG C of heating temperature, keeps the temperature 3~4h by the 8th step,
Using 3,500 4 roll reversing rollers carry out hot rolling, 1150~1180 DEG C of rolling temperature, 900~950 DEG C of finishing temperature, mill product
Specification 1250mm × 35mm × L.
9th step is aligned after the completion of rolling using 11 roller straighteners, guarantees plate face flatness 5mm/1000mm, is rectified
Roller-way spraying cooling after the completion of straight.
Embodiment 3:
When Ce content is in upper limit level (0.14% ~ 0.15%) in consutrode, produced using the manufacturing method of the present invention dilute
Native heat resisting steel 253MA electroslag slab, comprising the following steps:
The first step smelts consutrode using " 8T intermediate frequency furnace+8TAOD " mode, to realize the abundant deoxidation of molten steel, presses
Then plus the Al line deep deoxidation of 1.5Kg/t silicon metal pre-deoxidation is added in 2.3Kg/t, adjusts Si in steel to 1.65% before tapping,
[O] control is in 30ppm hereinafter, tapping temperature control ladle at 1580 ± 10 DEG C, tapping first adds 1Kg/t SiAlBaCa alloy
Then Rare-Earth Ce-La alloy is added in deoxidation according to 2.8Kg/t into steel stream.
Electrode specification is 180mm × 1170mm × L, and about 6 tons of substance, electrode chemical component is met the requirements of the standard, such as the following table 7
Shown, Ce content is in upper limit level (0.14% ~ 0.15%) in electrode.
Table 7 is 253MA electrode chemical component (weight %)
Second step polishes consutrode surface clean；
Third step prepares slag charge.Slag system uses CaF2、CaO、Al2O3、MgO、RExOyFive yuan of slag systems, the weight percent of each constituent element
Than being respectively 46%, 12%, 12%, 10%, 20%, quantity of slag 300kg.Slag charge is separated in merging electric furnace, temperature is controlled at 800 DEG C, is dried
It is 7 hours roasting；
Baked slag charge is added in slugging packet by the 4th step, striking slag making, and the slugging time about 80 minutes, slag temperature control system existed
1650 ~ 1700 DEG C, guarantees that slag system melts, changes clearly, 10 minutes before slugging furnace blowing out, 1kgAl pre-deoxidations are added into melt cinder；
Bottom water case is moved in crystallizer, is sealed by the 5th step, after consutrode and crystallizer centering, is raised up to crystallizer
Mouthful；
6th step, liquid slag is poured into crystallizer, and consutrode is inserted into slag bath, covers blowing argon cover, power transmission is opened
Beginning electroslag remelting, the voltage of equipment are set as 60V, and electric current is set as 16KA, and electrode melting speed is 360kg/h, electroslag remelting
Stage constantly adds the deoxidation of SiAlBaCa alloying pellet into slag bath, and speed is added according to 15g/5min, feeding in the electroslag remelting stage
Stage is according to 10g/5min；
7th step, electroslag remelting finish, and electroslag remelting plate blank are carried out secondary misting cooling, the specification of electroslag remelting plate blank is
250mm × 1250mm × 2500mm, about 6 tons of weight.
Chemical composition analysis is carried out to Rare earth heat-resistant steel 253MA electroslag remelting plate blank, as a result such as table 8, ingredient is complied with standard
It is required that.
Table 8 is 253MA electroslag slab chemical component (weight %)
Electroslag remelting plate blank is packed into heated by natural gas stove heating, 1180~1200 DEG C of heating temperature, keeps the temperature 3~4h by the 8th step,
Using 3,500 4 roll reversing rollers carry out hot rolling, 1150~1180 DEG C of rolling temperature, 900~950 DEG C of finishing temperature, mill product
Specification 35mm × 1250mm × L.
9th step is aligned after the completion of rolling using 11 roller straighteners, guarantees plate face flatness 5mm/1000mm, is rectified
Roller-way spraying cooling after the completion of straight.
Claims (3)
1. a kind of manufacturing method of rare-earth heat-resistant steel board, Rare earth heat-resistant steel first uses intermediate frequency furnace and AOD furnace to smelt consumable
Electrode is made qualified electroslag slab, electroslag slab is most rolled into through milling train the plate of specified specification afterwards then through electroslag remelting
Material, which is characterized in that the manufacturing method are as follows:
Step 1: consutrode is smelted using intermediate frequency furnace+AOD furnace, when smelting by Rare-Earth Ce content control in consutrode
Silicon metal pre-deoxidation is added 0.10%~0.15%, by 2.0~2.5Kg/t in system, and then plus the Al line of 1.0~1.5Kg/t is deeply de-
Oxygen adjusts Si in steel to 1.6%~1.7% before tapping, and [O] control is in 30ppm hereinafter, tapping temperature control is 1580 ± 10
DEG C, ladle first adds 1Kg/t SiAlBaCa alloy deoxidation when tapping, and the ingredient of SiAlBaCa alloy by weight percentage includes 35%
Then Rare-Earth Ce-La conjunction is added in Si, 10%Ca, 10%Ba, 12%Al, surplus Fe according to 60%~70% recovery rate into steel stream
Gold, the ingredient of Ce-La alloy by weight percentage include 62%~68%Ce, 32%~38%La, and Rare-Earth Ce target content is
0.12%；
Step 2: electroslag remelting is carried out using five yuan of electroslag slag systems, by comsumable melt speed control 340~360Kg/ in sight
H, whole Argon carry out gas shield, and according to the Al content in consutrode, by automatic charging equipment, according to 0.05% ~
Constantly SiAlBaCa alloying pellet is added to slag bath surface in 0.08% total Al content, is diffused deoxidation to slag, wherein five
First electroslag slag system includes 40%~46%CaF by weight percentage2、12%CaO、12%Al2O3, 10%MgO, 20%~26%RExOy；
Step 3: electroslag remelting finishes to obtain electroslag remelting plate blank, after the secondary misting cooling of electroslag remelting plate blank, using milling train
Hot rolling is aligned again using straightener after hot rolling, obtains rare-earth heat-resistant steel board.
2. a kind of manufacturing method of rare-earth heat-resistant steel board as described in claim 1, it is characterised in that: as Ce in consutrode
When content is in 0.10% ~ 0.12%, slag system is respectively 40% CaF using weight percent2、12% CaO、12% Al2O3、10%
MgO、26%RExOy, when Ce content is in 0.125% ~ 0.135% in consutrode, slag system is respectively 44% using weight percent
CaF2、12% CaO、12% Al2O3、10% MgO、22%RExOy, when in consutrode Ce content be in threshold level 0.14% ~
When 0.15%, slag system is respectively 46% CaF using weight percent2、12% CaO、12% Al2O3、10% MgO、20%RExOy。
3. a kind of manufacturing method of rare-earth heat-resistant steel board as described in claim 1, it is characterised in that: in electroslag remelting rank
Section, is diffused deoxidation to slag using deoxidier SiAlBaCa alloy, electroslag early period and mid-term are according to 15g/5 ~ 18g/5min
Speed is added, and the electroslag feeding stage is added according to 10g/5min speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988381.7A CN109023023B (en) | 2018-08-28 | 2018-08-28 | Method for manufacturing rare earth heat-resistant steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988381.7A CN109023023B (en) | 2018-08-28 | 2018-08-28 | Method for manufacturing rare earth heat-resistant steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109023023A true CN109023023A (en) | 2018-12-18 |
| CN109023023B CN109023023B (en) | 2020-04-21 |
Family
ID=64624871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810988381.7A Active CN109023023B (en) | 2018-08-28 | 2018-08-28 | Method for manufacturing rare earth heat-resistant steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109023023B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894603A (en) * | 2018-12-19 | 2019-06-18 | 鞍钢铸钢有限公司 | A kind of special thick electroslag slab production method |
| CN114107683A (en) * | 2021-09-28 | 2022-03-01 | 材谷金带(佛山)金属复合材料有限公司 | Electroslag remelting rolling method for Q235 steel/316 stainless steel |
| CN115323185A (en) * | 2022-08-29 | 2022-11-11 | 遵义新利特金属材料科技有限公司 | Production method of high-purity stainless steel electroslag remelting |
| CN115418489A (en) * | 2022-08-31 | 2022-12-02 | 重庆大学 | Method for accurately controlling boron in electroslag remelting boron-containing high-temperature alloy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62211330A (en) * | 1986-03-12 | 1987-09-17 | Sumitomo Metal Ind Ltd | Manufacture of austenitic stainless steel |
| CN1085262A (en) * | 1993-08-24 | 1994-04-13 | 中国兵器工业第五二研究所 | A kind of rare-earth stainless steel and smelting process thereof |
| CN100999806A (en) * | 2006-12-31 | 2007-07-18 | 许季祥 | High performance corrosion-proof rare earth super strength dual-phase stainless steel and its smelting tech. |
| CN103555960A (en) * | 2013-11-04 | 2014-02-05 | 洛阳双瑞特种装备有限公司 | Slag system for ingot drawing electroslag remelting superaustenitic stainless steel |
| CN107312937A (en) * | 2017-06-26 | 2017-11-03 | 洛阳双瑞特种装备有限公司 | A kind of the high temperature resistant concentrated sulfuric acid high silicon stainless steel manufacture method and its equipment |
-
2018
- 2018-08-28 CN CN201810988381.7A patent/CN109023023B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62211330A (en) * | 1986-03-12 | 1987-09-17 | Sumitomo Metal Ind Ltd | Manufacture of austenitic stainless steel |
| CN1085262A (en) * | 1993-08-24 | 1994-04-13 | 中国兵器工业第五二研究所 | A kind of rare-earth stainless steel and smelting process thereof |
| CN100999806A (en) * | 2006-12-31 | 2007-07-18 | 许季祥 | High performance corrosion-proof rare earth super strength dual-phase stainless steel and its smelting tech. |
| CN103555960A (en) * | 2013-11-04 | 2014-02-05 | 洛阳双瑞特种装备有限公司 | Slag system for ingot drawing electroslag remelting superaustenitic stainless steel |
| CN107312937A (en) * | 2017-06-26 | 2017-11-03 | 洛阳双瑞特种装备有限公司 | A kind of the high temperature resistant concentrated sulfuric acid high silicon stainless steel manufacture method and its equipment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894603A (en) * | 2018-12-19 | 2019-06-18 | 鞍钢铸钢有限公司 | A kind of special thick electroslag slab production method |
| CN114107683A (en) * | 2021-09-28 | 2022-03-01 | 材谷金带(佛山)金属复合材料有限公司 | Electroslag remelting rolling method for Q235 steel/316 stainless steel |
| CN115323185A (en) * | 2022-08-29 | 2022-11-11 | 遵义新利特金属材料科技有限公司 | Production method of high-purity stainless steel electroslag remelting |
| CN115418489A (en) * | 2022-08-31 | 2022-12-02 | 重庆大学 | Method for accurately controlling boron in electroslag remelting boron-containing high-temperature alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109023023B (en) | 2020-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104862443B (en) | A kind of smelting process of low carbon low silicon welding wire steel | |
| CN109023023A (en) | A kind of manufacturing method of rare-earth heat-resistant steel board | |
| CN102021488B (en) | Steel for nuclear-island seamless steel tube and production method thereof | |
| CN104498818B (en) | A kind of ER70S-6 gren rod and preparation method thereof | |
| CN104946972B (en) | Steel disc strip for diode lead and production technology of steel disc strip | |
| CN109023059A (en) | The production technology of automotive suspension spring steel 60Si2Mn gren rod | |
| CN107841687B (en) | A kind of smelting process of ultralow boron steel | |
| CN104532102A (en) | Novel manufacturing technology of large-sized carburized bearing steel G20Cr2Ni4A for wind electricity | |
| CN107350445B (en) | The production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets | |
| CN104212977B (en) | A kind of containing Ti non-corrosive metal stripping electroslag remelting plate blank Ti element control method | |
| CN106011381B (en) | A kind of molten steel extra furnace dephosphorization production technology | |
| CN104141024A (en) | Method for producing high-purity pure iron | |
| CN109161696B (en) | Electroslag remelting slag system and low-oxygen control method for electroslag remelting Fe-Cr-Al alloy | |
| CN104233064A (en) | 170MPa-grade cold-rolled phosphorized IF high-strength steel and production method thereof | |
| CN105950882B (en) | A kind of remelting refining slag and its for the electro-slag re-melting method to the high Ti steel alloys of high Al | |
| CN108546880A (en) | Steel BG22SiMnNi2CrMoA and preparation method thereof | |
| CN112410664A (en) | High-strength and anti-nodule CNRE rare earth heat-resistant steel for hearth roll and preparation method thereof | |
| CN107201422A (en) | A kind of production method of mild steel | |
| CN108531815A (en) | High temperature bolt steel BG25Cr2MoVA and preparation method thereof | |
| CN107604173A (en) | A kind of heavy slab electroslag furnace melting speed control technique | |
| CN105088087B (en) | High-toughness optimal welding micro-alloyed cast steel and preparation method thereof | |
| CN103938088B (en) | A kind of sheet billet continuous casting method of resistance alloy Cr20AlY | |
| CN112961989B (en) | Low-carbon high-aluminum steel and electroslag production method thereof | |
| CN105648301A (en) | 42CrMo melting process | |
| CN1321213C (en) | Smelting manufacturing method for high temperature ferric alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |