CN105779869B - The method of 30Mn circular pipe blank steel Inner Quality of Billet control - Google Patents
The method of 30Mn circular pipe blank steel Inner Quality of Billet control Download PDFInfo
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- CN105779869B CN105779869B CN201610170001.XA CN201610170001A CN105779869B CN 105779869 B CN105779869 B CN 105779869B CN 201610170001 A CN201610170001 A CN 201610170001A CN 105779869 B CN105779869 B CN 105779869B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
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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
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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
- 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
- C21C7/072—Treatment with gases
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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
- 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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- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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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 relates to field of steel metallurgy, especially a kind of method of 30Mn circular pipe blanks steel Inner Quality of Billet control.Technical problem to be solved, which is to provide one kind, allows strand crack defect to be effectively controlled, and casting blank solidification tissue is effectively improved, and so as to realize the method for the 30Mn circular pipe blank steel Inner Quality of Billet of internal quality control control, comprises the following steps：A, first it is converter smelting process；B, it is secondly LF stove refined molten steel techniques；C, it is finally section continuous casting process, wherein：M-EMS parameter is stir current 300~400A, 2~4Hz；Solidification end stirring parameter is 100~200A of stir current, 4.0~7.0Hz of frequency；The degree of superheat is controlled at 25~35 DEG C；Casting speed control is in 0.70~1.00m/min；Crystallizer cooling control is in 2400~2500L/min；Water Rate for Secondary Cooling Water is controlled in 0.21~0.30/kgSteel.Among the larger specification 30Mn circular pipe blank steel Inner Quality of Billet control technique of φ 350mm sections production.
Description
Technical field
The present invention relates to field of steel metallurgy, especially a kind of method of 30Mn circular pipe blanks steel Inner Quality of Billet control.
Background technology
For 30Mn tube blank steels, middle carbon, 1.28%~1.42% manganese content in steel grades determine in itself
Continuous casting production process strand crack sensitivity is stronger.Low mainly due to steel grade thermal conductivity factor, linear expansion coefficient is big, cooled and solidified
During produce larger internal stress, easily produce surface crack defect；Furthermore because casting blank section is relatively large and is round billet,
Its specific surface area is smaller, and strand heat transfer efficiency is lower, and solidification cooling is slow, and after green shell is formed, general who has surrendered causes to cast under heat transfer efficiency
Base cross section radial symmetry gradient becomes big, and heat transfer directionality highlights, and further results in column crystal prosperity, equiaxial crystal ratio is relatively low to become
Gesture.Therefore, casting process will take into account crackle control and casting blank solidification organization optimization, realize that difficulty is larger.In continuous casting production process
Optimize casting blank solidification tissue, weaken solidification and heat transfer directionality, and further the generation of control strand crackle is Comprehensive Control 30Mn
The key of circular pipe blank slab quality.As metallurgical work sutdy, the emphasis that 30Mn circular pipe blank strand comprehensive qualities are research is improved,
Especially as improved 30Mn circular pipe blank strands equiaxial crystal ratio, control strand crackle.
Such as：CN101412082 discloses a kind of production method for preventing middle carbon high manganese steel crackle.What the invention solved
Technical problem is the technical problem that the middle carbon high manganese steel square billet for preventing continuous casting process from producing cracks.Middle carbon high manganese steel square billet
Preparation method includes following flow：Converter smelting-LF+RH refinings-billet continuous casting, it is characterised in that：In continuous casting, control connects
Casting pulling rate is 0.3~0.7m/min, and intensity of cooling is 0.37~0.53L/kg.The Al content in RH refining station control steel simultaneously
After 0.010%~0.050%, Ti contents 0.015%~0.045% in ferro-titanium control steel are added.By above-mentioned improvement,
The crackle of the strong middle carbon high manganese steel bloom of crack sensitivity can be eliminated.But produce larger specification for φ 350mm sections
The specific method of 30Mn circular pipe blanks slab quality control is not directed to.CN103008590A discloses a kind of Medium Carbon Steel Containing Manganese continuous casting knot
Brilliant device covering slag, it is characterized in that：Covering slag forms percentage by weight：SiO2 controls exist in 30.0~40.0wt%, CaO controls
13.0~22.3wt%, MgO control in 2.0~7.0wt%, A12O3 controls in 3.0~6.0wt%, Fe2O3 controls 1.0~
3.0wt%, MnO control control in 1.0~4.2wt%, Na2O controls in 1.2~5.0wt%, F controls in 2~7.3wt%, C
In 12~21.3wt%, K2O requirements≤2.0wt%, Li2O≤1.0wt%, B2O3≤1.0wt%, TiO2≤0.6wt%, its
Remaining is moisture and inevitable impurity.Its advantage is：Basicity is low, viscosity is low, hot-fluid is uniform, and its slag has at high operating temperatures
Preferable mobility and stability, the uniformity of crystallizer hot-fluid is effectively controlled, suitable for the billet continuous casting of efficient stable
Production process, the quality and yield that can make strand are largely increased.But produce larger specification 30Mn for φ 350mm sections
The specific method of circular pipe blank slab quality control is still not directed to.CN101508011, which discloses one kind, prevents Medium Carbon Steel Containing Manganese strand table
The production method of face lobe, technical problem to be solved are to provide a kind of life for preventing Medium Carbon Steel Containing Manganese surface longitudinal crack of slab
Production method.The production method comprises the following steps：A. conventionally converter smelting, alloying after smelting, controls its carbon to contain
Measure as 0.25%-0.40%, manganese content 1.25%-1.75%；B. aluminium is added after alloying in molten steel and carries out final deoxidizing；C.
Molten steel continuous casting, produces Medium Carbon Steel Containing Manganese.It is characterized in that：Ferro-titanium is added after step B final deoxidizings, controls its Ti content to be
0.005%-0.0145%；Add ferro-titanium and carry out molten steel continuous casting again.Realized by the improvement and avoid Medium Carbon Steel Containing Manganese continuous casting
Base produces the purpose of surface longitudinal crack defect.But produce larger specification 30Mn circular pipe blanks strand for φ 350mm sections and integrate
The specific method of quality control is still not directed to.
The content of the invention
The technical problems to be solved by the invention, which are to provide one kind, allows strand crack defect to be effectively controlled, casting blank solidification
Tissue is effectively improved, so as to realize the method for the 30Mn circular pipe blank steel Inner Quality of Billet of internal quality control control.
The technical solution adopted for the present invention to solve the technical problems is：The control of 30Mn circular pipe blank steel Inner Quality of Billet
Method, comprise the following steps：
A, it is converter smelting process first, wherein the carbon content scope of converter terminal is 0.05%~0.15%, terminal
Temperature range >=1670 DEG C, chain-wales are fed by 1.5~2.0m of ton steel feed quantity plus aluminum steel, carry out deoxidation treatment, chain-wales mesh
Mark composition is pressed：Carbon is 0.25%~0.30%, element silicon is 0.18%~0.25%, manganese element be 1.20%~
1.30%th, P elements≤0.015% is controlled, and deoxidation alloying carries out the soft blow more than or equal to 3min after terminating；
B, it is secondly LF stove refined molten steel techniques, wherein carrying out trimming before outbound, refining latter stage adds titanium alloy material,
Addition is carried out with addition of 200~500m of progress feed quantity, which is fed, afterwards adds silico-calcium by the 0.020%~0.035% of molten steel weight
Line carries out Calcium treatment, adds wherein the first heat of middle bag is fed by the upper limit, and the soft blow more than or equal to 6min is carried out after line feeding and is stirred, LF
Outbound target temperature is controlled according to 1560~1600 DEG C；
C, it is finally section continuous casting process, wherein：M-EMS parameter is stir current 300~400A, 2~
4Hz；Solidification end stirring parameter is 100~200A of stir current, 4.0~7.0Hz of frequency；The degree of superheat is controlled 25~35
℃；Casting speed control is in 0.70~1.00m/min；Crystallizer cooling control is in 2400~2500L/min；Water Rate for Secondary Cooling Water control exists
0.21~0.30/kgSteel。
It is further that in the step a, the Argon intensity of the soft blow that deoxidation alloying is carried out after terminating is to avoid molten steel
It is exposed to be defined.
The beneficial effects of the invention are as follows：The present invention passes through " M-EMS+solidification end electromagnetic agitation " combined type
The method of electromagnetic agitation is realized to casting blank solidification Heat Transfer Optimization, realizes and larger specification 30Mn circular pipe blank solidified structures are controlled
System, improve casting blank solidification tissue equiaxial crystal ratio, improve strand low power grading quality level and strand consistency occurrence.It is acted on
Mechanism is：M-EMS produces electromagnetic torque by magnetic field, changes flow field of molten steel, thermo parameters method feelings inside crystallizer
Condition, promote Mold composition, equalizing temperature, weaken solidification and heat transfer directionality, promote green shell homoepitaxial；Further
Ground, solidification end electromagnetic agitation drive the flowing of mushy zone molten steel by pressure, and fusing is washed away to columanar structure, improve isometric
Brilliant nucleation rate, suppress column crystals growth, improve strand equiaxial crystal ratio, finally realize the raising of strand central dense degree, improve casting
Base internal soundness；But solidification end electromagnetic agitation intensity is too strong, easily causes dentrite tip and wash away seriously, cause low melting point
The low solute concentration molten steel of strong mobility is assembled in a ring, forms white band；Furthermore the rational degree of superheat and pulling rate match control
And intensity of secondary cooling formulation is the key of the key to casting blank solidification heat transfer control, the i.e. control of strand center mass.In addition, by right
Molten steel carries out Trace Titanium Treatment, improves high-temp plastic, reduces steel grade crack sensitivity.Present invention is particularly suitable for φ 350mm sections
Produce among larger specification 30Mn circular pipe blank steel Inner Quality of Billet control technique.
Embodiment
The method of 30Mn circular pipe blank steel Inner Quality of Billet control, comprises the following steps：A, first it is converter smelting process,
Wherein the carbon content scope of converter terminal is 0.05%~0.15%, and temperature range >=1670 DEG C of terminal, chain-wales press ton steel
1.5~2.0m feed quantity is fed plus aluminum steel, carries out deoxidation treatment, and chain-wales target component is pressed：Carbon be 0.25%~
0.30%th, element silicon is 0.18%~0.25%, manganese element is 1.20%~1.30%, P elements≤0.015% is controlled,
Deoxidation alloying carries out the soft blow more than or equal to 3min after terminating；B, it is secondly LF stove refined molten steel techniques, wherein before outbound
Carry out trimming, refining latter stage add titanium alloy material, addition by molten steel weight 0.020%~0.035% carry out with addition of,
200~500m of progress feed quantity, which is fed, afterwards adds silicon-calcium wire to carry out Calcium treatment, adds wherein the first heat of middle bag is pressed the upper limit and fed, line feeding
Carry out the soft blow more than or equal to 6min afterwards to stir, the outbound target temperatures of LF are controlled according to 1560~1600 DEG C；C, it is last
For section continuous casting process, wherein：M-EMS parameter is stir current 300~400A, 2~4Hz；Solidification end electromagnetism
Mixing parametric is 100~200A of stir current, 4.0~7.0Hz of frequency；The degree of superheat is controlled at 25~35 DEG C；Casting speed control exists
0.70~1.00m/min；Crystallizer cooling control is in 2400~2500L/min；Water Rate for Secondary Cooling Water is controlled in 0.21~0.30/kg
Steel.
During actual production, the steel grade chemical constituent that uses by weight percentage for：C：0.30%~0.34%, Si：
0.20%~0.34%, Mn：1.28%~1.42%, P≤0.025%, S≤0.020%, Cr≤0.15%, Cu≤0.20%,
Ni≤0.25%, As, Sn content requirement in steel：As≤0.030%, Sn≤0.010%, 0.4As+6Sn≤0.072%；Remaining
Residual elements requirement：Ti≤0.04%, Mo≤0.10%, V≤0.020%, Nb≤0.01%, B≤0.0005%, surplus are
Fe.Under normal circumstances, " chill fine grained region, post are presented from casting billet surface to center for casting blank solidification tissue in continuous casting process
The crystallizer tissue regions in shape crystalline region, Center Equiaxial Crystal area ".Strand equiaxial crystal ratio is improved to improve slab quality, improves strand
Central area consistency, metallurgy industry emerges kinds of processes technology at present, wherein the method for improving strand center porosity just has
Electromagnetic agitating technology and solidification end Reduction Technology, and for round billet, to ensure the regular demand of strand appearance and size, without using solidifying
Gu end Reduction Technology.
Embodiment
Embodiment 1
Certain steel mill refines → tetra- machines four stream casting machine φ 350mm section continuous castings using 120t converter smeltings → LF stoves
30Mn circular pipe blanks.At the end of bessemerizing, aim carbon is controlled for 0.10%, and outlet temperature is controlled at 1675 DEG C；Chain-wales
Deoxidation is carried out by 1.7m/t steel feeding aluminum steel；The outbound Composition Control of chain-wales is：[C] 0.27%, [Si] 0.22%, [Mn]
1.24%th, [P] 0.013%；Soft blow argon stirring is carried out after deoxidation alloying, mixing time 3.7min, it is naked that stirring does not occur molten steel
Dew.
Molten steel is reached at LF refining furnace, is carried out Argon molten steel and is fluctuated slightly, do not occur turning over phenomenon greatly, after refining terminates, presses
The 0.026% of molten steel weight is with addition of Ti；Fed with addition of after plus 400m silicon-calcium wires carry out Calcium treatment, 7.5min has been carried out after line feeding
Soft blow stirring, LF out-station temperatures be 1587 DEG C.
Allocation and transportation to four machines four stream casting machine φ 350mm sections carry out molten steel casting after LF refining processing terminates, will with the present invention
Related actual control of critical technical parameter is asked to be：M-EMS：Stir current 365A, stirring frequency 2.0Hz；Solidification
End electromagnetic agitation：Stir current 100A, stirring frequency 7.0Hz；The actual casting process degree of superheat control of molten steel is at 25~30 DEG C；
Pulling rate is 0.7m/min；Crystallizer cooling control is in 2456L/min；Water Rate for Secondary Cooling Water is controlled in 0.21/kg steel.
After the stable utilization of above-mentioned technological invention, slab quality is well controlled, and strand low power testing result is：Strand is dredged
0.5~1.0 grade of looseness, non-densified regions diameter proportion 40.2%；The defects of casting billet surface flawless, casting billet surface synthesis is without cleaning
Rate reaches 99.2%.The analysis consistency detection of strand in-situ metal, central area 0.82, strand equiax crystal section length ratio
50.1%~53.9%；It is 0.96~1.05 that strand, which bores sample segregation testing result,.
Embodiment 2
Certain steel mill refines → tetra- machines four stream casting machine φ 350mm section continuous castings using 120t converter smeltings → LF stoves
30Mn circular pipe blanks.At the end of bessemerizing, aim carbon is controlled for 0.15%, and outlet temperature is controlled at 1673 DEG C；Chain-wales
Deoxidation is carried out by 1.5m/t steel feeding aluminum steel；The outbound Composition Control of chain-wales is：[C] 0.25%, [Si] 0.25%, [Mn]
1.20%th, [P] 0.013%；Soft blow argon stirring is carried out after deoxidation alloying, mixing time 4.5min, it is naked that stirring does not occur molten steel
Dew.
Molten steel is reached at LF refining furnace, is carried out Argon molten steel and is fluctuated slightly, do not occur turning over phenomenon greatly, after refining terminates, presses
The 0.020% of molten steel weight is with addition of Ti；Fed with addition of after plus 200m silicon-calcium wires carry out Calcium treatment, 7.3min has been carried out after line feeding
Soft blow stirring, LF out-station temperatures be 1560 DEG C.
Allocation and transportation to four machines four stream casting machine φ 350mm sections carry out molten steel casting after LF refining processing terminates, will with the present invention
Related actual control of critical technical parameter is asked to be：M-EMS：Stir current 300A, stirring frequency 3.2Hz；Solidification
End electromagnetic agitation：Stir current 175A, stirring frequency 5.5Hz；The actual casting process degree of superheat control of molten steel is at 28~34 DEG C；
Pulling rate is 1.00m/min；Crystallizer cooling control is in 2400L/min；Water Rate for Secondary Cooling Water is controlled in 0.30/kgSteel。
After the stable utilization of above-mentioned technological invention, slab quality is well controlled, and strand low power testing result is：Strand is dredged
0.5 grade of looseness, non-densified regions diameter proportion 38.8%；The defects of casting billet surface flawless, casting billet surface synthesis reach without cleaning rate
To 98.7%.The analysis consistency detection of strand in-situ metal, central area 0.88, strand equiax crystal section length ratio 51.4%
~56.4%；It is 0.95~1.04 that strand, which bores sample segregation testing result,.
Embodiment 3
Certain steel mill refines → tetra- machines four stream casting machine φ 350mm section continuous castings using 120t converter smeltings → LF stoves
30Mn circular pipe blanks.At the end of bessemerizing, aim carbon is controlled for 0.05%, and outlet temperature is controlled at 1680 DEG C；Chain-wales
Deoxidation is carried out by 2.0m/t steel feeding aluminum steel；The outbound Composition Control of chain-wales is：[C] 0.30%, [Si] 0.18%, [Mn]
1.30%th, [P] 0.009%；Soft blow argon stirring is carried out after deoxidation alloying, mixing time 4.0min, it is naked that stirring does not occur molten steel
Dew.
Molten steel is reached at LF refining furnace, is carried out Argon molten steel and is fluctuated slightly, do not occur turning over phenomenon greatly, after refining terminates, presses
The 0.035% of molten steel weight is with addition of Ti；Fed with addition of after plus 500m silicon-calcium wires carry out Calcium treatment, 6.5min has been carried out after line feeding
Soft blow stirring, LF out-station temperatures be 1600 DEG C.
Allocation and transportation to four machines four stream casting machine φ 350mm sections carry out molten steel casting after LF refining processing terminates, will with the present invention
Related actual control of critical technical parameter is asked to be：M-EMS：Stir current 400A, stirring frequency 4.0Hz；Solidification
End electromagnetic agitation：Stir current 200A, stirring frequency 4.0Hz；The actual casting process degree of superheat control of molten steel is at 27~35 DEG C；
Pulling rate is 0.86m/min；Crystallizer cooling control is in 2500L/min；Water Rate for Secondary Cooling Water is controlled in 0.27/kgSteel。
After the stable utilization of above-mentioned technological invention, slab quality is well controlled, and strand low power testing result is：Strand is dredged
0.5~1.0 grade of looseness, non-densified regions diameter proportion 41.1%；The defects of casting billet surface flawless, casting billet surface synthesis is without cleaning
Rate reaches 97.8%.The analysis consistency detection of strand in-situ metal, central area 0.83, strand equiax crystal section length ratio
51.5%~53.2%；It is 0.96~1.04 that strand, which bores sample segregation testing result,.
Above-described embodiment illustrates to obtain using the φ 350mm section 30Mn circular pipe blank slab qualities of the technology of the present invention production
Effectively control, particularly strand crackle control and center porosity defects controlling, strand is without face crack, in the grading of pickling low power
The heart it is loose it is complete≤1.0 grades, center porosity region area diameter proportion≤41.1%, non-densified regions maximum length be 112mm, to casting
Base center position area carries out consistency detection using in-situ metal analyzer, controls more than 0.82, the isometric crystalline region of strand
Length ratio 50.1%~56.4%, strand bore sample segregation and are detected as 0.95~1.05.
Claims (2)
- The method of 1.30Mn circular pipe blank steel Inner Quality of Billet control, it is characterised in that comprise the following steps：A, it is converter smelting process first, wherein the carbon content scope of converter terminal is 0.05%~0.15%, the temperature of terminal Scope >=1670 DEG C, chain-wales by 1.5~2.0m of ton steel feed quantity feed plus aluminum steel, carry out deoxidation treatment, chain-wales target into Divide and press：Carbon is 0.25%~0.30%, element silicon is 0.18%~0.25%, manganese element is 1.20%~1.30%, phosphorus Element≤0.015% is controlled, and deoxidation alloying carries out the soft blow more than or equal to 3min after terminating；B, it is secondly LF stove refined molten steel techniques, wherein carrying out trimming before outbound, refining latter stage adds titanium alloy material, adds Amount is carried out with addition of 200~500m of progress feed quantity is fed afterwards plus silicon-calcium wire enters by the 0.020%~0.035% of molten steel weight Row Calcium treatment, add wherein the first heat of middle bag is fed by the upper limit, the soft blow more than or equal to 6min is carried out after line feeding and is stirred, LF is outbound Target temperature is controlled according to 1560~1600 DEG C；C, it is finally section continuous casting process, wherein：M-EMS parameter is stir current 300~400A, 2~4Hz；It is solidifying Gu end stirring parameter is 100~200A of stir current, 4.0~7.0Hz of frequency；The degree of superheat is controlled at 25~35 DEG C；Draw Speed control is in 0.70~1.00m/min；Crystallizer cooling control is in 2400~2500L/min；Water Rate for Secondary Cooling Water is controlled 0.21 ~0.30/kgSteel。
- 2. the method for 30Mn circular pipe blanks steel Inner Quality of Billet control as claimed in claim 1, it is characterised in that：The step In a, the Argon intensity for the soft blow that deoxidation alloying is carried out after terminating is to avoid molten steel is exposed from being defined.
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| CN111534742A (en) * | 2020-04-30 | 2020-08-14 | 天津钢管制造有限公司 | Pipe blank for preventing internal cracks of steel pipe blank of gas cylinder, manufacturing method and application |
| CN111896712A (en) * | 2020-08-03 | 2020-11-06 | 攀钢集团攀枝花钢钒有限公司 | Method for low-power quality inspection of continuous casting billet |
| CN115466825B (en) * | 2022-08-29 | 2024-01-30 | 包头钢铁（集团）有限责任公司 | Method for improving middle and subcutaneous cracks of high-strength weather-proof anti-seismic peritectic steel special-shaped blank flange plate |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61140357A (en) * | 1984-12-11 | 1986-06-27 | Kobe Steel Ltd | Electromagnetic stirring method of weakly deoxidized steel in continuous casting of slab |
| CN101086203B (en) * | 2007-07-19 | 2010-06-16 | 天津钢铁有限公司 | Method for producing continuous casting round billet for petroleum bush using convertor process |
| JP4495224B2 (en) * | 2008-03-12 | 2010-06-30 | 新日本製鐵株式会社 | Slabs with excellent solidification structure |
| CN101412082B (en) * | 2008-12-05 | 2010-12-08 | 攀钢集团研究院有限公司 | Production method for preventing cracks on medium-carbon high manganese steel |
| CN102896287B (en) * | 2011-07-28 | 2015-05-06 | 攀钢集团有限公司 | Method for improving inner quality of continuous casting billet and system therefor |
| CN105331885A (en) * | 2015-10-09 | 2016-02-17 | 天津钢铁集团有限公司 | Production method of 37 Mn round billets for air cylinders |
| CN105215310A (en) * | 2015-11-17 | 2016-01-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method that big cross section Properties of Heavy Rail Steel strand center porosity controls |
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