CN109536666A - A kind of high silicon hot forming steel continuous casting producing method - Google Patents
A kind of high silicon hot forming steel continuous casting producing method Download PDFInfo
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- CN109536666A CN109536666A CN201811580571.1A CN201811580571A CN109536666A CN 109536666 A CN109536666 A CN 109536666A CN 201811580571 A CN201811580571 A CN 201811580571A CN 109536666 A CN109536666 A CN 109536666A
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- steel
- slab
- continuous casting
- high silicon
- hot forming
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- 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
- B22D11/111—Treating the molten metal by using protecting powders
-
- 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
-
- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
-
- 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
- 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
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
-
- 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
-
- 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
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
Abstract
The invention discloses a kind of high silicon hot forming steel continuous casting producing methods, belong to metallurgical steelmaking technical field.Step of the present invention are as follows: step 1: molten iron pretreatment；Step 2: using the carbon and phosphorus in top and bottom combined blown converter removing molten steel, and deoxidation alloying is carried out；Step 3: it is transferred to the initial adjustment that Argon station carries out the dissolved aluminum of ingredient and steel grade；Step 4: ladle refining furnace heating fine tuning molten steel composition makes reducing slag desulfurization, removes inclusion content in melting steel；Step 5: vacuum circulation degassing refining furnace removes the hydrogen and fine tuning ingredient of steel grade, removes inclusion content in melting steel and deformation processing of inclusion；Step 6: using slab caster the qualified continuous casting solidification of liquid molten steel at the slab of certain shapes；Step 7: slab hot charging.The present invention can eliminate the mass defects such as crackle and the fracture of high silicon hot forming steel slab, hot rolled coil surface quality with it is functional, effectively realize stably producing for the steel grade.
Description
Technical field
The present invention relates to metallurgical steelmaking technical fields, more specifically to a kind of high silicon hot forming steel continuous casting side
Method.
Background technique
Increasingly strict with energy-saving and emission-reduction requirement, on the basis of ensuring safety, vehicle complete vehicle lightweight is general trend of events institute
Become, and the lightweight of body frame part is the light-weighted key point of vehicle, is the second generation high-strength steel of representative with TRIP, DP etc.
It has been commonly utilized on body structural member and safety member, but still has not been able to satisfy the intensity and forming synthesis of partial shape complex component
Demand.Major steel looks forward to all active development, production using QP980 as the third generation automobile super-high strength steel of representative both at home and abroad, however by
In its complicated component system and special microstructure characteristic, there is deep oscillation mark, surface longitudinal crack and transverse breakage etc. in slab
Many defects bring great difficulty with quality control to stably producing for slab slab.
Summary of the invention
1. technical problems to be solved by the inivention
In view of the defects existing in the prior art with deficiency, the present invention provides a kind of high silicon hot forming steel continuous casting sides
Method, this method can eliminate the mass defects such as crackle and the fracture of high silicon hot forming steel slab, and that realizes the steel grade stablizes batch
Production.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of high silicon hot forming steel continuous casting producing method of the invention, the steps include:
Step 1: molten iron pretreatment；
Step 2: using the carbon and phosphorus in top and bottom combined blown converter removing molten steel, and deoxidation alloying is carried out；
Step 3: it is transferred to the initial adjustment that Argon station carries out the dissolved aluminum of ingredient and steel grade；
Step 4: ladle refining furnace heating fine tuning molten steel composition makes reducing slag desulfurization, removes inclusion content in melting steel；
Step 5: vacuum circulation degassing refining furnace removes the hydrogen and fine tuning ingredient of steel grade, removes inclusion content in melting steel and folder
Sundries deformation process；
Step 6: using slab caster the qualified continuous casting solidification of liquid molten steel at the slab of certain shapes；
Step 7: slab hot charging.
Further, the step six, crystallizer ontology is set in slab caster, and the upper surface of crystallizer ontology is knot
In slab caster casting process, crystallizer protecting residue is added in crystallizer ontology on molten steel face for brilliant device meniscus.
Further, the crystallizer protecting residue basicity R (CaO/SiO2) it is 1.29 ± 0.05.
Further, the step six sets level two in slab caster, presets secondary cooling water in level two and compare water
Amount control, secondary cooling water specific water are set as 0.61 ± 0.05L/Kg, poring rate according to steel grade characteristic, casting cycle and in wrapped
Temperature carries out manual adjustment, and poring rate is 1.0m/min~1.3m/min.
Further, the step six, slab caster use two cold electromagnetism roller techniques, difference inside slab caster
Equipped with the first electromagnetic stirring roller and the second electromagnetic stirring roller, electromagnetism roller installation site is apart from crystallizer meniscus vertical range
3.5~8m, the first electromagnetic stirring roller electric current/frequency are respectively 200~300A/2~4Hz, the second electromagnetic stirring roller electric current/frequency
Respectively 300~400A/3~5Hz.
Further, the step six, slab caster use dynamic soft-reduction technique, overall reduction be 4.0~
5.5mm, pressure range are solid rate (fS) 10%~80%, and reduction ratio is 0.8~1.5mm/m.
Further, the step seven, slab hot charging, temperature are 400 DEG C~680 DEG C, and temperature measurement location is table on slab
Face middle.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, have the following beneficial effects:
The present invention can eliminate the mass defects such as crackle and the fracture of high silicon hot forming steel slab, hot rolled coil surface quality with
It is functional, effectively realize stably producing for the steel grade.
Detailed description of the invention
Fig. 1 is slab temperature measurement location schematic diagram of the invention；
Fig. 2 is slab caster schematic diagram of internal structure of the invention.
In figure: 1, crystallizer ontology；2, crystallizer meniscus；3, the first electromagnetic stirring roller；4, second pair of electromagnetic stirring roller.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples:
Embodiment 1
It will be seen from figure 1 that a kind of high silicon hot forming steel continuous casting producing method of the present embodiment, the steps include:
Step 1: molten iron pretreatment, the mainly sulphur in removing molten iron；
Step 2: using the carbon and phosphorus in top and bottom combined blown converter removing molten steel, and carrying out deoxidation alloying, and bottom is compound on top blows
Sweetening process can strengthen the stirring to metal bath for previous oxygen top-blown converter, also pass through furnace bottom to metal bath
It is blown a certain amount of gas, to accelerate metallurgical reaction, and is allowed to level off to equilibrium state, to overcome the weak of simple top blast
Point reduces steel technology, and saves the dosage of ferroalloy, is conducive to the smelting of mild steel and reduces the dosage of slag making materials；
Step 3: it is transferred to the initial adjustment that Argon station carries out the dissolved aluminum of ingredient and steel grade, Argon station can adjust molten steel
Temperature, uniform molten steel composition promote inclusion floating, improve deoxidation of molten steel effect；
Step 4: ladle refining furnace heating fine tuning molten steel composition makes reducing slag desulfurization, removes inclusion content in melting steel；
Step 5: vacuum circulation degassing refining furnace removes the hydrogen and fine tuning ingredient of steel grade, removes inclusion content in melting steel and folder
Sundries deformation process；
Step 6: using slab caster the qualified continuous casting solidification of liquid molten steel at the slab of certain shapes；
Step 7: slab hot charging, slab hot charging, temperature are 400 DEG C~680 DEG C, and temperature measurement location is among slab upper surface
Locate, at " a " point position in as Fig. 1.
It invents in specific processing step, high silicon hot forming steel chemical composition is as shown in table 1, Cross Section of CC Billet specification are as follows:
(210~250) × (900~1600) mm2。
The high silicon hot forming steel chemical composition (%) of table 1
In step 6, figure it is seen that crystallizer ontology 1 is set in slab caster, the upper surface of crystallizer ontology 1
For crystallizer meniscus 2, in slab caster casting process, crystallizer protecting residue is added to molten steel face in crystallizer ontology 1
On, primarily serve lubrication and Heat Transfer Control, dross inclusion adsorption and adiabatic heat-insulation effect, and the chemical component of crystallizer protecting residue and
Physical and chemical index then influences in the effect casting process that crystallizer protecting residue is played, crystallizer protecting residue basicity R (CaO/SiO2)
It is 1.29 ± 0.05.
The high silicon hot forming steel crystallizer protecting residue chemical component of table 2
Slab caster uses two cold electromagnetism roller techniques, is respectively provided with 3 He of the first electromagnetic stirring roller inside slab caster
Second electromagnetic stirring roller 4, electromagnetism roller installation site are 3.5~8m, the first electromagnetic agitation apart from 2 vertical range of crystallizer meniscus
3 electric currents of roller/frequency is respectively 200~300A/2~4Hz, and the second 4 electric currents of electromagnetic stirring roller/frequency is respectively 300~400A/3
~5Hz.
Level two is set in slab caster, secondary cooling water specific water control is preset in level two, and secondary cooling water specific water sets
It is set to 0.61 ± 0.05L/Kg, poring rate carries out manual adjustment, casting according to steel grade characteristic, casting cycle and the middle packet degree of superheat
Speed is 1.0m/min~1.3m/min, and slab caster uses dynamic soft-reduction technique, and overall reduction is 4.0~5.5mm, pressure
Lower section is solid rate (fS) 10%~80%, and reduction ratio is 0.8~1.5mm/m.
In specific implementation process, such as production specification is 230mm × 1400mm, carbon content 0.17%, silicone content are
2.0% high silicon hot forming steel, casting rate 1.2m/min, crystallizer protecting residue basicity are 1.28, and Water Rate for Secondary Cooling Water is
0.60L/Kg, it is the second electromagnetic agitation at 4.5m that the first electromagnetic stirring roller 3, which is mounted on apart from 2 vertical range of crystallizer meniscus,
It is at 7.2m that roller 4, which is mounted on apart from 2 vertical range of crystallizer meniscus, and two groups of agitating roller electric currents and frequency are respectively 250A/
3Hz, 350A/4Hz, dynamic soft-reduction overall reduction are 5.5mm, and pressure range is solid rate 20%~65%, and reduction ratio is
1.0mm/m, hot charging temperature are 560 DEG C.
It is C1.0, slab flawless and fracture defect, heat by the center segregation of continuous cast slab that above-mentioned technique is produced
Roll volume surface quality with it is functional.
Embodiment 2
Such as the high silicon hot forming that production specification is 220mm × 1600mm, carbon content 0.19%, silicone content are 1.8%
Steel, casting rate 1.1m/min, crystallizer protecting residue basicity are 1.27, and Water Rate for Secondary Cooling Water 0.60L/Kg, the first electromagnetism stirs
Mixing roller 3 and being mounted on apart from 2 vertical range of crystallizer meniscus is at 4.5m, and the second electromagnetic stirring roller 4 is mounted on apart from crystallizer
2 vertical range of meniscus is at 7.2m, and two groups of agitating roller electric currents and frequency are respectively 220A/2.5Hz, 330A/3Hz, Dynamic Light
Pressure overall reduction is 5.5mm, and pressure range is solid rate 20%~65%, and reduction ratio 1.0mm/m, hot charging temperature is 540
℃。
It is C0.5, slab flawless and fracture defect, heat by the center segregation of continuous cast slab that above-mentioned technique is produced
Roll volume surface quality with it is functional.
Embodiment 3
Such as the high silicon heat that production production specification is 250mm × 1000mm, carbon content 0.22%, silicone content are 1.7%
Forming steel, casting rate 1.0m/min, crystallizer protecting residue basicity are 1.27, Water Rate for Secondary Cooling Water 0.58L/Kg, the first electricity
It is at 4.5m that magnetic agitating roller 3, which is mounted on apart from 2 vertical range of crystallizer meniscus, and the second electromagnetic stirring roller 4 is mounted on distance knot
Brilliant 2 vertical range of device meniscus is that 7.2m locates, and two groups of agitating roller electric currents and frequency are respectively 280A/2.0Hz, 400A/4.5Hz,
Dynamic soft-reduction overall reduction is 5.5mm, and pressure range is solid rate 20%~65%, reduction ratio 1.2mm/m, hot charging temperature
It is 515 DEG C.
It is C1.0, slab flawless and fracture defect, heat by the center segregation of continuous cast slab that above-mentioned technique is produced
Roll volume surface quality with it is functional.
The present invention can eliminate the mass defects such as crackle and the fracture of high silicon hot forming steel slab, hot rolled coil surface quality with
It is functional, effectively realize stably producing for the steel grade.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (7)
1. a kind of high silicon hot forming steel continuous casting producing method, it is characterised in that: the steps include:
Step 1: molten iron pretreatment；
Step 2: using the carbon and phosphorus in top and bottom combined blown converter removing molten steel, and deoxidation alloying is carried out；
Step 3: it is transferred to the initial adjustment that Argon station carries out the dissolved aluminum of ingredient and steel grade；
Step 4: ladle refining furnace heating fine tuning molten steel composition makes reducing slag desulfurization, removes inclusion content in melting steel；
Step 5: vacuum circulation degassing refining furnace removes the hydrogen and fine tuning ingredient of steel grade, removes inclusion content in melting steel and field trash
Deformation process；
Step 6: using slab caster the qualified continuous casting solidification of liquid molten steel at the slab of certain shapes；
Step 7: slab hot charging.
2. a kind of high silicon hot forming steel continuous casting producing method according to claim 1, it is characterised in that: the step
Six, it sets crystallizer ontology (1) in slab caster, the upper surface of crystallizer ontology (1) is crystallizer meniscus (2), and slab connects
In casting machine casting process, crystallizer protecting residue is added on the interior molten steel face of crystallizer ontology (1).
3. a kind of high silicon hot forming steel continuous casting producing method according to claim 2, it is characterised in that: the crystallizer
Protect basicity of slag R (CaO/SiO2) it is 1.29 ± 0.05.
4. a kind of high silicon hot forming steel continuous casting producing method according to claim 1, it is characterised in that: the step
Six, level two is set in slab caster, secondary cooling water specific water control is preset in level two, and secondary cooling water specific water is set as
0.61 ± 0.05L/Kg, poring rate carry out manual adjustment, poring rate according to steel grade characteristic, casting cycle and the middle packet degree of superheat
For 1.0m/min~1.3m/min.
5. a kind of high silicon hot forming steel continuous casting producing method according to claim 2, it is characterised in that: the step
Six, slab caster uses two cold electromagnetism roller techniques, is respectively provided with the first electromagnetic stirring roller (3) and second inside slab caster
Electromagnetic stirring roller (4), electromagnetism roller installation site are 3.5~8m, the first electromagnetic agitation apart from crystallizer meniscus (2) vertical range
Roller (3) electric current/frequency is respectively 200~300A/2~4Hz, and the second electromagnetic stirring roller (4) electric current/frequency is respectively 300~
400A/3~5Hz.
6. a kind of high silicon hot forming steel continuous casting producing method according to claim 1, it is characterised in that: the step
Six, slab caster uses dynamic soft-reduction technique, and overall reduction is 4.0~5.5mm, and pressure range is solid rate (fS) 10%
~80%, reduction ratio is 0.8~1.5mm/m.
7. a kind of high silicon hot forming steel continuous casting producing method according to claim 1, it is characterised in that: the step
Seven, slab hot charging, temperature is 400 DEG C~680 DEG C, and temperature measurement location is slab upper surface middle.
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| CN201811580571.1A CN109536666A (en) | 2018-12-24 | 2018-12-24 | A kind of high silicon hot forming steel continuous casting producing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940140A (en) * | 2019-05-05 | 2019-06-28 | 马鞍山钢铁股份有限公司 | A method of improving hypo-peritectic steel center segregation of casting blank quality |
| CN110257723A (en) * | 2019-07-25 | 2019-09-20 | 马鞍山钢铁股份有限公司 | A kind of high silicon hot forming steel continuous casting producing method |
| CN113118398A (en) * | 2021-04-19 | 2021-07-16 | 山西太钢不锈钢股份有限公司 | Production method for eliminating large-grain carbide of high-carbon martensitic stainless steel continuous casting slab |
| CN113118400A (en) * | 2021-04-20 | 2021-07-16 | 东北大学 | Homogenized slab continuous casting production method under outfield cooperative control action |
| CN113664174A (en) * | 2021-07-02 | 2021-11-19 | 包头钢铁（集团）有限责任公司 | Production method of steel S355NL commodity blank for wind power flange |
| CN114749617A (en) * | 2020-11-25 | 2022-07-15 | 宝钢德盛不锈钢有限公司 | Production method for reducing mountain scale at edge of hot-rolled 200-series stainless steel coil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086203A (en) * | 2007-07-19 | 2007-12-12 | 天津钢铁有限公司 | Method for producing continuous casting round billet for petroleum bush using convertor process |
| CN106947919A (en) * | 2017-03-21 | 2017-07-14 | 马钢(集团)控股有限公司 | A kind of high-toughness hot forming steel and its production method |
-
2018
- 2018-12-24 CN CN201811580571.1A patent/CN109536666A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086203A (en) * | 2007-07-19 | 2007-12-12 | 天津钢铁有限公司 | Method for producing continuous casting round billet for petroleum bush using convertor process |
| CN106947919A (en) * | 2017-03-21 | 2017-07-14 | 马钢(集团)控股有限公司 | A kind of high-toughness hot forming steel and its production method |
Non-Patent Citations (2)
| Title |
|---|
| 刘启龙 等: "S650MC高强钢连铸轻压下工艺优化", 《炼钢》 * |
| 刘海春: "980Mpa高强钢炼钢生产过程控制", 《河北冶金》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940140A (en) * | 2019-05-05 | 2019-06-28 | 马鞍山钢铁股份有限公司 | A method of improving hypo-peritectic steel center segregation of casting blank quality |
| CN110257723A (en) * | 2019-07-25 | 2019-09-20 | 马鞍山钢铁股份有限公司 | A kind of high silicon hot forming steel continuous casting producing method |
| CN114749617A (en) * | 2020-11-25 | 2022-07-15 | 宝钢德盛不锈钢有限公司 | Production method for reducing mountain scale at edge of hot-rolled 200-series stainless steel coil |
| CN114749618A (en) * | 2020-11-25 | 2022-07-15 | 宝钢德盛不锈钢有限公司 | Production method for reducing mountain scale at edge of hot-rolled 200-series stainless steel coil |
| CN114749617B (en) * | 2020-11-25 | 2024-03-01 | 宝钢德盛不锈钢有限公司 | Production method for reducing mountain scales at hot rolled edge of 200 series stainless steel |
| CN114749618B (en) * | 2020-11-25 | 2024-03-01 | 宝钢德盛不锈钢有限公司 | Production method for reducing mountain scales at hot rolled edge of 200 series stainless steel |
| CN113118398A (en) * | 2021-04-19 | 2021-07-16 | 山西太钢不锈钢股份有限公司 | Production method for eliminating large-grain carbide of high-carbon martensitic stainless steel continuous casting slab |
| CN113118400A (en) * | 2021-04-20 | 2021-07-16 | 东北大学 | Homogenized slab continuous casting production method under outfield cooperative control action |
| CN113118400B (en) * | 2021-04-20 | 2022-04-22 | 东北大学 | Homogenized slab continuous casting production method under outfield cooperative control action |
| CN113664174A (en) * | 2021-07-02 | 2021-11-19 | 包头钢铁（集团）有限责任公司 | Production method of steel S355NL commodity blank for wind power flange |
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