CN107586919A - A kind of preparation technology of Low-carbon deep drawing steel - Google Patents
A kind of preparation technology of Low-carbon deep drawing steel Download PDFInfo
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Abstract
The invention provides a kind of preparation technology of Low-carbon deep drawing steel, including：Converter smelting process, argon station process, RH refining procedures, sheet billet continuous casting process and billet rolling process are carried out successively；It is 0.06~0.08% that the converter smelting process, which controls endpoint carbon content, and terminal 200~400ppm of oxygen content, tapping temperature is 1660~1680 DEG C.Compared with prior art, the present invention optimizes to Low-carbon deep drawing steel preparation technology flow, carries out further decarburization by using RH refinery practices, converter procedure is avoided producing substantial amounts of field trash with tapping steel with high carbon.Converter tapping carbon content is of a relatively high in the present invention, makes Molten Steel over-oxidation degree low, and deoxygenated alloy consumption is reduced, and molten steel recovery rate is high, and mitigates the erosion to converter lining.Preparation technology provided by the invention can obtain the second best in quality Low-carbon deep drawing steel.
Description
Technical field
The present invention relates to steel technical field of smelting, more particularly to a kind of preparation technology of Low-carbon deep drawing steel.
Background technology
For low-carbon deep-draw hot-rolled coil after the technique such as cold rolled annealed, product has intensity high, good toughness, is easily processed into
The premium properties such as type and good weldability, thus it is widely used in household electrical appliances, ship, automobile, bridge, building, machinery, pressure
The manufacturings such as container.
At present, the manufacturing process of domestic each steel mill's production Low-carbon deep drawing steel mainly has following several：Technological process 1：Converter
Smelting-LF stoves-RH refinings-continuous casting-steel billet is cleared up-enters stove rolling (such as plum steel, horse steel etc.)；Technological process 2：Turn
Stove smelting-RH refinings-LF stoves-continuous casting-steel billet is cleared up-enters stove rolling, and (such a technique can use high manganese generation
Cost of alloy, such as husky steel, ripples steel are reduced for spiegeleisen)；Technological process 3：Converter smelting-LF stoves-continuous casting-steel
Stove rolling (such as Tang Gang, Anshan iron and steel plant) is cleared up-entered to base.
Major defect existing for above-mentioned technology is technological process length, and the fluctuation of production technology causes steel quality unstable,
Make coil of strip peeling, pipe quality objection amount 0.5% or so, and molten steel purification is mainly by external refining, the quantity of slag is big, high energy consumption,
Iron loss is high, cost is high, it is big that converter lining is corroded, and CO2 emissions are high.
The content of the invention
In view of this, it is simple it is an object of the invention to provide a kind of technological process and that quality can be prepared is preferably low
The preparation technology of carbon deep punching steel.
The invention provides a kind of preparation technology of Low-carbon deep drawing steel, including：
Converter smelting process, argon station process, refining procedure, sheet billet continuous casting process and billet rolling process are carried out successively；
It is 0.06~0.08% that the converter smelting process, which controls endpoint carbon content, and terminal oxygen content is 200~400ppm,
Tapping temperature is 1660~1680 DEG C.
In the present invention, the composition of the Low-carbon deep drawing steel is preferably：
0.007~0.030wt% C；
≤ 0.020wt% Si；
≤ 0.30wt% Mn；
≤ 0.020wt% P；
≤ 0.015wt% S；
0.020~0.060wt% Als (dissolved aluminum)；
≤ 0.0040wt% N；
Surplus is Fe.
In the present invention, the performance (tensile property) of the Low-carbon deep drawing steel is preferably：
Yield strength preferably≤210MPa；
Tensile strength is preferably 270~350MPa；
Elongation is preferably >=42%.
In the present invention, the converter procedure preferably uses top and bottom complex blowing technique, improves converter oxygen supply intensity, strengthens whole
The mixing effect of BOTTOM ARGON BLOWING, make end phosphorus content≤0.010%, terminal nitrogen content≤0.0015%.In the present invention, described turn
Catch carbon success of the preferred blowing of furnaceman's sequence, it is 0.06-0.08% control endpoint carbon content, terminal oxygen content for 200~
400ppm, tapping temperature are controlled at 1660~1680 DEG C.In the present invention, the converter procedure preferably passes through automatic Steelmaking skill
Art, optimization iron and steel stock, the structure of auxiliary material, ensure converter terminal composition and temperature in claimed range, continue decarburization for RH refinings
Advantage is provided.In the present invention, the converter procedure tapping is preferably operated using Slag pushing-off vehicle, is reduced the lower quantity of slag, is preferably controlled
Thickness of slag layer≤50mm processed, tapping process preferably carry out alloying operation.
Due to having the ability of further decarburization in the technological process of the present invention using RH refinery practices, so converter procedure
It can avoid producing substantial amounts of field trash with tapping steel with high carbon.Converter tapping carbon content is of a relatively high in the present invention, makes Molten Steel over-oxidation
Degree is low, and deoxygenated alloy consumption is reduced, and molten steel recovery rate is high, alleviates the erosion to converter lining.
In the present invention, low alkalinity transformation of the way slag, the low alkalinity transformation of the way are preferably added in the converter procedure tapping process
The composition of slag preferably includes：
CaO、Al2O3And SiO2；
Mass contents of the CaO in low alkalinity changes a social system slag is preferably 45~50%；
The Al2O3Mass content in low alkalinity changes a social system slag is preferably 20~25%；
The SiO2Mass content in low alkalinity changes a social system slag is preferably 8~9%.
The low alkalinity transformation of the way slag that the present invention uses, changes the inclusion morphology in steel, forms low melting point, the folder of high-ductility
Debris.
In the present invention, the argon station process is preferably to add aluminium powder into argon station, so as to be changed a social system to ladle slag, is reduced
The oxidisability of slag, low alkalinity slag system is formed, so as to change the form of field trash, reduce inclusion melting point, make it have good
Plasticity.
In the present invention, the RH refining procedures are molten steel vacuum circulation degassing process.The present invention preferably refines work in RH
Prepare 4 stove straight carbon steel molten steel before sequence production and carry out circular treatment.In the present invention, preferred pair steel during the RH refining procedures
Bag and refining vacuum channel carry out the pre-heat treatment, and the temperature of the pre-heat treatment is more than 400 DEG C, to reduce the steel of ladle and refining process
Water temperature drops, and so as to avoid heating by O2 blowing, increases being mingled with for oxide in steel.In the present invention, in the RH refining process preferably
Physical and chemical index inspection is carried out before using vacuum tank, vacuum tank after 90 times preferably using being changed.The present invention is refined using RH
Mode, RH decarburizations remove the oxygen in molten steel simultaneously, and caused gas does not pollute molten steel, and gas eliminates steel during floating
Middle field trash, steel inclusion is few, is compared compared with LF stoves, stabilizes the control of carbon content, avoids electrode carburetting.RH refinings are reduced
The use of slag material, power consumption is reduced, low-carbon alloy, reduction cost of alloy can be replaced using high carbon alloy.
The present invention is to jacking ladle, vacuumizing and molten steel being extracted into the operation circulated in vacuum tank in RH refining process
There is no special limitation, operated using the conventional operating method of those skilled in the art.In the present invention, the RH
In refining process ensure vacuum preferably≤67Pa, carry out quick decarburization, degassing operation；Ensure circulation time (net circulation time)
It is preferred that ＞ 10min remove steel grade field trash.
In the present invention, the sheet billet continuous casting process preferably uses tundish protective casting, and casting cycle carries out whole guarantor
Shield casting.The present invention makes casting cycle interval by the sealing of the sealing means and pouring basket lid that improve tundish long nozzle
Exhausted air is better, and the aluminium of casting cycle damages preferably≤40ppm.
In the prior art, the thermometer hole of pouring basket lid and thief hole design using square hole, and the material of pouring basket lid is
Q345B, as shown in figure 1, clad is yielding during long-time high-temperature baking.The present invention is improved to pouring basket lid, is changed
Pouring basket lid thermometer hole and thief hole after entering are designed using elliptical aperture, and material uses whole board making of Q235B rollings, such as
Shown in Fig. 2, this pouring basket lid pad is few, is unlikely to deform, and the improvement of pouring basket lid structure makes sealing effectiveness more preferable, more resistance to
With.
The present invention is improved to the tundish long nozzle for use of being cast in sheet billet continuous casting process, is adopted in the prior art
Tundish long nozzle is as shown in figure 3, long nozzle sealing ring carries flanging, and sealing ring is in the wrist of long nozzle.This hair
It is bright by being improved to tundish long nozzle, long nozzle after improvement is by the way of argon gas combines sealing with sealing ring, band
The sealing ring of flanging can hinder the sealing effectiveness of argon gas, and the sealing ring flanging of tundish long nozzle is cancelled and increased close by the present invention
The height of seal, make its ＞ 0.5mm, sealing ring is exceeded long nozzle wrist, this long nozzle sealing effectiveness is more preferable, and the present invention changes
Tundish long nozzle after entering is as shown in Figure 4.
Sealing of the invention by improving pouring basket lid and tundish long nozzle, make tundish sealing protection and metallurgical effect
It is improved, avoiding the blocking of middle water containing opening causes aggregation of the steel inclusion in mouth of a river wall, pollutes molten steel.
In the present invention, the sheet billet continuous casting process is using crystallizer metallurgy and mould electromagnetic brake.The present invention is to knot
Flow field in brilliant device metallurgical process is optimized, and by changing the structure of submersed nozzle, changes the temperature field in crystallizer,
Make inclusion floating so as to change the flow trace of molten steel and extend flowing time.
In the prior art, submersed nozzle polycrystalline substance is " convex ", as shown in figure 5, this submersed nozzle bottom
Temperature field is as shown in Figure 6.The present invention preferably changes into submersed nozzle polycrystalline substance " convex " " spill ", and side opening size increases
Greatly, as shown in fig. 7, the temperature field of the submersed nozzle bottom after improving is as shown in Figure 8.Immersion after this improvement of the present invention
Mouth of a river polycrystalline substance, the flow velocity of molten steel is reduced, mitigate impact, rolled up caused by the backflow shearing force for avoiding molten steel upward is excessive
Slag, and the inclusion floating that flow velocity promotes slowly.
The present invention employs mould electromagnetic brake technology and non-for the further upward stream stock shearing force of mitigation molten steel
Sinusoidal vibration technology, electromagnetic braking and the improvement of Oscilation Parameters of Mold are carried out, avoid the slag of molten steel.
In the present invention, the parameter of electromagnetic brake technology is preferably：
Operating current is preferably 570~590A, more preferably 575~585A, most preferably 580A；
Frequency is preferably 1.7~1.9Hz, more preferably 1.75~1.85Hz, most preferably 1.8Hz；
Central magnetic field intensity is preferably 590Gs~610Gs, more preferably 595~605Gs, most preferably 600Gs.
In the present invention, the parameter of mold oscillation is preferably：
C1 is preferably 1.7~1.8, and more preferably 1.75；
C2 is preferably 1.4~1.6, and more preferably 1.5；
C3 is preferably 130~140, and more preferably 135；
C4 is preferably -9~-11, and more preferably -10；
C5 is preferably 0；
C6 is preferably 0.1~0.3, and more preferably 0.2.
The present invention obtains molten steel stream stock by the improvement to submersed nozzle+electromagnetic braking+non-sinusoidal oscillation technology
Improve, reduce the subsurface inclusion and rimhole of strand, banded peeling defect occur after avoiding cold rolling.Peeling defect
Refer to the irregular Overlapping splats for being mingled with nonmetallic substance in steel, often along strip roller-way direction extend, may opening or not
Opening, have a strong impact on the surface quality of coil of strip after slab rolling.
The covering slag used in crystallizer metallurgical process is optimized the present invention, by the excellent of protection slag ingredient
Change, add the tension force of liquid phase slag and molten steel surface, viscosity is properly increased to covering slag, improve basicity, avoid slag and carry
The high ability of dross inclusion adsorption.In the present invention, the composition of the covering slag preferably includes：
0.38~0.42% H2O；
28~31% SiO2；
33~34% CaO；
1.6~1.7% MgO；
3.6~3.7% Al2O3；
0.4~0.5% Fe2O3；
0.3~0.4% MnO；
8~9% C.
In the present invention, the composition of the covering slag more preferably includes：
0.4% H2O；
29.69% SiO2；
33.55% CaO；
1.65% MgO；
3.65% Al2O3；
0.42% Fe2O3；
0.31% MnO；
8.08% C.
In the present invention, the viscosity of the covering slag is preferably 0.14~0.16Pa.S, more preferably 0.15~
0.155Pa.S, most preferably 0.153Pa.S；The fusing point of the covering slag is preferably 1100~1130 DEG C, more preferably 1115~
1125 DEG C, most preferably 1119.1 DEG C；Molten speed preferably 35~40s, the more preferably 36~38s of the covering slag, most preferably
For 37s；The basicity of the covering slag is preferably 1.1~1.2, and more preferably 1.13.
The present invention reduces slag, improves the effect of absorption slag inclusion by optimizing covering slag performance.
The present invention makes field trash become lower melting point inclusion, the blocking of anti-waterstop port by above-mentioned preparation technology.And this
The production technology that invention provides makes the cleanliness factor of molten steel high, is mingled with few in molten steel, and has carried out in casting process a series of
Above-mentioned optimization and improvement, make field trash be not easy to assemble, do not block the mouth of a river.Compared with prior art, the present invention need not carry out calcium
Processing operation, reduces cost.
Concrete operations of the present invention to the billet rolling process do not have special limitation, ripe using those skilled in the art
The billet rolling technique known rolls to steel billet.
The key point of the present invention is the provision of a kind of technological process of production of improved Low-carbon deep drawing steel；To converter, argon
Stand, refined molten steel purifies and the control of inclusion morphology；The improvement of control mode during continuous casting protective casting；Crystallizer flow
The improvement (including optimization submersed nozzle+electromagnetic braking+non-sinusoidal oscillation) of optimization；And used protection slag ingredient and reason
Change the optimization of index.The present invention to the Control and Inclusion Removal process of three converter, RH refinings, continuous casting processes by changing
Enter, solve the quality problems of short route production Low-carbon deep drawing steel, reach production cost reduction, finished product inclusion content of steel drop
Low purpose, it is met final use demand, improve CSAT.
Compared with prior art, present invention reduces the technological process of production, converter decarburization burden is alleviated, reduces refining slag
The discharge of consumption, energy consumption, carbon dioxide；By converter tapping steel with high carbon, molten steel oxidation is weak, and argon station ladle slag is changed a social system, and changes
Slag inclusion form；Purification molten steel is controlled by RH processes, reduces the quantity of steel inclusion, ensures the degree of purity of molten steel, weight
Anaerobic respiratory enzyme, the crystallizer of point control casting process tundish use electromagnetic braking, mitigate stream stock impact, and crystallizer smoothness is excellent
Change, change MOLTEN STEEL FLOW track, and Oscilation Parameters of Mold is optimized, the optimization of crystallizer protecting residue performance, fully ensure that floating
The absorption of field trash, ensure slab quality, make that its amount of inclusions is few, size is small, fusing point is low, be evenly distributed, prevent peeling and lack
Fall into.Therefore, production technology solution traditional processing technology cost provided by the invention is high, the technological process of production is long, quality is unstable,
The problems such as high energy consumption, iron loss are high, resistance to material erosion is serious, CO2 emission is high.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the structural representation of clad among prior art；
Fig. 2 is the structural representation of the pouring basket lid after the present invention improves；
Fig. 3 is bag long nozzle material object picture among prior art；
Fig. 4 is the tundish long nozzle material object picture after the present invention improves；
Fig. 5 is prior art submersed nozzle polycrystalline substance schematic diagram；
Fig. 6 is the temperature field of prior art submersed nozzle bottom；
Fig. 7 is the submersed nozzle polycrystalline substance schematic diagram after the present invention improves；
Fig. 8 is the temperature field of the submersed nozzle bottom after the present invention improves.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Embodiment
The preparation of Low-carbon deep drawing steel is carried out according to following technological process：
Converter smelting → argon station (the ladle slag transformation of the way) → refining (RH) → sheet billet continuous casting (crystallizer metallurgy+crystallizer electromagnetism
Braking) → steel billet directly enter stove rolling.
Converter smelting process：Converter uses top and bottom complex blowing, makes terminal [P]≤0.010%, terminal [N]≤0.0015%, blows
Refining catch carbon success, between 0.06~0.08%, terminal [O] content goes out in 200~400ppm control terminal [C] content
Steel temperature control, by automatic Steelmaking technology, optimization iron and steel stock, auxiliary material structure, ensures converter between 1660~1680 DEG C
Terminal composition and temperature are in claimed range.Tapping is operated using Slag pushing-off vehicle, is reduced the lower quantity of slag, is controlled thickness of slag layer≤50mm,
Tapping process carries out alloying operation.
Argon station process：Converter tapping process adds low alkalinity transformation of the way slag, and its main component includes：CaO 48wt%, Al2O3
23wt%, SiO28wt%.Subsequently into argon station plus aluminium powder, the oxidisability of slag is reduced, forms low alkalinity slag system.
RH refining procedures：The preparation before production is carried out, prepares 4 stove straight carbon steel molten steel before manufacture, carries out circular treatment.It is right
Ladle and RH vacuum tanks are preheated, and ensure temperature more than 400 DEG C, and the resistance to material of vacuum tank carries out physical and chemical index inspection before using,
Vacuum tank uses 90 replacings.Then jacking ladle is carried out, is vacuumized, molten steel is extracted into vacuum tank and circulated, is ensured true
Reciprocal of duty cycle≤67Pa, quick decarburization, degassing operation are carried out, ensure net circulation time ＞ 10min.
Continuous casting working procedure (tundish protective casting+crystallizer metallurgy+electromagnetic braking+non-sinusoidal oscillation)：
1) tundish protective casting：Casting cycle carries out whole process protection casting, using the tundish long nozzle shown in Fig. 4
Sealing means (sealing means of argon gas+sealing ring, sealing ring highly exceed mouth of a river wrist 0.5mm without flanging, sealing ring) are carried out
Sealing, carried out with the pouring basket lid (thermometer hole and thief hole are designed using elliptical aperture, material Q235B) of structure shown in Fig. 2 close
Envelope；Aluminium damage≤40ppm of casting cycle.
2) using the spill immersion type water nozzle structure shown in Fig. 7, (submersed nozzle bottom has the temperature field point shown in Fig. 8
Cloth)；
3) electromagnetic brake technology parameter：
Operating current：580A
Frequency：1.8Hz
Central magnetic field intensity：600Gs
4) Oscilation Parameters of Mold：
| Parameter | C1 | C2 | C3 | C4 | C5 | C6 |
| 1.75 | 1.5 | 135 | -10 | 0 | 0.2 |
5) slag ingredient and performance are protected
The Low-carbon deep drawing steel that method provided in an embodiment of the present invention is prepared detects, and its composition is：
0.02wt% C；0.01wt% Si；0.2wt% Mn；0.01wt% P；0.01wt% S；0.03wt% Als；
0.003wt% N, surplus Fe.
Low-carbon deep drawing steel that method provided in an embodiment of the present invention is prepared carries out performance detection, and testing result is,
Yield strength is 180MPa, tensile strength 330MPa, elongation 45%.As can be seen that the embodiment of the present invention is prepared
Low-carbon deep drawing steel meet composition and performance requirement.
Using the online Surface testing instrument of imported from America Cognex, the surface for the Low-carbon deep drawing steel volume that embodiment is prepared
Quality is detected, and its distinguishable more than 60 kind coil of strip surface quality defect, testing accuracy is high, can 100% identification coil of strip peeling lack
Fall into.Testing result shows, uses the peeling quality objection for the Low-carbon deep drawing steel volume that technique provided by the invention is prepared as 0,
Coil of strip increased quality positive effect, process provided by the invention can effectively control the quality of Low-carbon deep drawing steel, Er Qiesheng
Production. art flow is short, and production cost is relatively low, energy-saving and emission-reduction.
As seen from the above embodiment, the invention provides a kind of preparation technology of Low-carbon deep drawing steel, including：Turned successively
Stove smelting procedure, argon station process, RH refining procedures, sheet billet continuous casting process and billet rolling process；The converter smelting process control
Endpoint carbon content processed is 0.06~0.08%, terminal 200~400ppm of oxygen content, and tapping temperature is 1660~1680 DEG C.With showing
There is technology to compare, the present invention optimizes to technological process, carries out further decarburization by using RH refinery practices, makes converter
Process can avoid producing substantial amounts of field trash with tapping steel with high carbon.Converter tapping carbon content is of a relatively high in the present invention, makes molten steel mistake
Degree of oxidation is low, and deoxygenated alloy consumption is reduced, and molten steel recovery rate is high, and mitigates the erosion to converter lining.It is provided by the invention
Preparation technology can obtain the second best in quality Low-carbon deep drawing steel.
Claims (10)
1. a kind of preparation technology of Low-carbon deep drawing steel, including：
Converter smelting process, argon station process, RH refining procedures, sheet billet continuous casting process and billet rolling process are carried out successively；
It is 0.06~0.08% that the converter smelting process, which controls endpoint carbon content, and terminal oxygen content is 200~400ppm, tapping
Temperature is 1660~1680 DEG C.
2. preparation technology according to claim 1, it is characterised in that the converter smelting process control end phosphorus content≤
0.010%, terminal nitrogen content≤0.0015%.
3. preparation technology according to claim 1, it is characterised in that added in the converter smelting process tapping process low
Basicity changes a social system slag, and the composition of the low alkalinity transformation of the way slag includes：
CaO、Al2O3And SiO2；
Mass contents of the CaO in low alkalinity changes a social system slag is 45~50%；
The Al2O3Mass content in low alkalinity changes a social system slag is 20~25%；
The SiO2Mass content in low alkalinity changes a social system slag is 8~9%.
4. preparation technology according to claim 1, it is characterised in that to ladle and refining during the RH refining procedures
Vacuum tank carries out the pre-heat treatment, temperature >=400 DEG C of the pre-heat treatment.
5. preparation technology according to claim 1, it is characterised in that vacuum during the RH refining procedures≤
67Pa, circulation time ＞ 10min.
6. preparation technology according to claim 1, it is characterised in that the sheet billet continuous casting process is poured using tundish protection
Casting, casting cycle carry out whole process protection；
The thermometer hole and thief hole for the pouring basket lid that the tundish protective casting uses design for elliptical aperture, the material of pouring basket lid
Matter is Q235B steel.
7. preparation technology according to claim 6, it is characterised in that the tundish length that the tundish protective casting uses
The sealing ring at the mouth of a river is without flanging and the height ＞ 0.5mm of sealing ring.
8. preparation technology according to claim 1, it is characterised in that the sheet billet continuous casting process using crystallizer it is metallurgical and
Mould electromagnetic brake；
The technical parameter of the mould electromagnetic brake is：
Operating current is：570~590A；
Frequency is：1.7~1.9Hz；
Central magnetic field intensity is：590Gs~610Gs.
9. preparation technology according to claim 8, it is characterised in that the crystallizer in the sheet billet continuous casting process shakes
Dynamic parameter is：
C1 is：1.7~1.8；
C2 is：1.4~1.6；
C3 is：130~140；
C4 is：- 9~-11；
C5 is：0；
C6 is：0.1~0.3.
10. preparation technology according to claim 8, it is characterised in that the guarantor used in the sheet billet continuous casting process
The composition of shield slag includes：
0.38~0.42% H2O；
28~31% SiO2；
33~34% CaO；
1.6~1.7% MgO；
3.6~3.7% Al2O3；
0.4~0.5% Fe2O3；
0.3~0.4% MnO；
8~9% C.
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| CN111206139A (en) * | 2018-11-21 | 2020-05-29 | 新疆八一钢铁股份有限公司 | Steelmaking process for producing low-carbon low-silicon cold-rolled sheet in short process |
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| CN101343677A (en) * | 2008-09-01 | 2009-01-14 | 湖南华菱涟源钢铁有限公司 | Process for manufacturing low-silicon low-carbon deep punching/drawing steel |
| CN103008632A (en) * | 2012-11-27 | 2013-04-03 | 浙江铭德新材科技有限公司 | Split combined type tundish cover and manufacturing method thereof |
| CN103469075A (en) * | 2013-09-18 | 2013-12-25 | 济钢集团有限公司 | Super deep-drawing cold-rolled enamel steel produced by ASP diplex process and manufacturing method thereof |
| CN104399961A (en) * | 2014-11-28 | 2015-03-11 | 湖北新叶液压机械股份有限公司 | Molten steel pouring device |
| CN105369112A (en) * | 2015-10-21 | 2016-03-02 | 吉林建龙钢铁有限责任公司 | Manufacturing process for ultra-low carbon steel |
| CN106148633A (en) * | 2016-07-28 | 2016-11-23 | 攀钢集团攀枝花钢铁研究院有限公司 | The stable control method of aluminum content in a kind of IF steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111206139A (en) * | 2018-11-21 | 2020-05-29 | 新疆八一钢铁股份有限公司 | Steelmaking process for producing low-carbon low-silicon cold-rolled sheet in short process |
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