CN110257723A - 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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- CN110257723A CN110257723A CN201910677547.8A CN201910677547A CN110257723A CN 110257723 A CN110257723 A CN 110257723A CN 201910677547 A CN201910677547 A CN 201910677547A CN 110257723 A CN110257723 A CN 110257723A
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- continuous casting
- hot forming
- forming steel
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- silicon hot
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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
- B22D11/111—Treating the molten metal by using protecting powders
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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
-
- 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
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- 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
- B22D11/16—Controlling or regulating processes or operations
-
- 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
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
-
- 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, wherein, described high its chemical component weight percentage content of silicon hot forming steel are as follows: C:0.12~0.25%, Si:1.20~2.0%, Mn:1.15~2.5%, P :≤0.025%, S :≤0.0030%, Als: 0.015~0.065%, Nb :≤0.055%；The production method is the following steps are included: molten iron pretreatment → top and bottom combined blown converter → Argon station → ladle refining → molten steel vacuum processing → slab caster → hot charging.The high silicon hot forming steel continuous casting producing method design is reasonable, high silicon hot forming steel center segregation of casting blank stability contorting is in C0.5-C1.5, and casting billet surface is without longitudinal crack and deep oscillation mark defect, and slab is without phenomenon of rupture, hot rolled coil surface quality with it is functional, realize stably producing for the steel grade.
Description
Technical field
The present invention relates to metallurgy industry slab continuous casting steel machine technical fields, more particularly, to a kind of high silicon hot forming steel continuous casting
Production 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
In view of the shortcomings of the prior art, technical problem to be solved by the invention is to provide a kind of high silicon hot forming steel continuous casting is raw
Production method eliminates the mass defects such as crackle and the fracture of high silicon hot forming steel slab, realizes stably producing for the steel grade.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is as follows: a kind of high silicon hot forming steel continuous casting is raw
Production method, wherein
Described high its chemical component weight percentage content of silicon hot forming steel are as follows:
C:0.12~0.25%, Si:1.20~2.0%, Mn:1.15~2.5%, P :≤0.025%, S :≤
0.0030%, Als: 0.015~0.065%, Nb :≤0.055%；
The production method the following steps are included:
Molten iron pretreatment → top and bottom combined blown converter → Argon station → ladle refining → molten steel vacuum processing → slab caster
→ hot charging.
The continuous casting steel billet specifications section of the continuous casting are as follows: thickness (210~250) × width (900~1600) mm2。
Its chemical component weight percentage content of the crystallizer protecting residue of continuous casting in the slab caster are as follows:
SiO2: 26~32%, MgO:3~7%, CaO:31~37%, Fe2O3:≤3%, Al2O3:≤4%, R2O:8~
12%, F:4.5~8.5%, H2O :≤0.5%, C:4~8%.
The Water Rate for Secondary Cooling Water used in the slab caster are as follows: 0.61 ± 0.05L/Kg and poring rate be 1.0~
1.3m/min。
Two cold electromagnetism roller techniques, technological parameter specifically: first pair of electromagnetic stirring roller are used in the slab caster
Electric current/frequency is respectively 200~300A/2~4Hz；Second pair of electromagnetic stirring roller electric current/frequency be respectively 300~400A/3~
5Hz。
In the slab caster use dynamic soft-reduction technique, technological parameter specifically: overall reduction be 4.0~
5.5mm；Pressure range is solid rate (fS) 10%~80%；Reduction ratio is 0.8~1.5mm/m；
The slab hot charging temperature is 400 DEG C~680 DEG C.
The crystallizer protecting residue basicity R (CaO/SiO2) it is 1.29 ± 0.05.
Compared with prior art, the present invention having the advantage that
Rationally, high silicon hot forming steel center segregation of casting blank stability contorting exists for the high silicon hot forming steel continuous casting producing method design
C0.5-C1.5, casting billet surface is without longitudinal crack and deep oscillation mark defect, and for slab without phenomenon of rupture, hot rolled coil surface quality and performance are good
It is good, realize stably producing for the steel grade.
Detailed description of the invention
Content expressed by each width attached drawing of this specification and the label in figure are briefly described below:
Fig. 1 is electromagnetic agitation rod schematic view of the mounting position in the present invention.
Fig. 2 is slab temperature measuring point schematic diagram of the present invention.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation.
The high silicon hot forming steel chemical composition weight percent content are as follows:
C:0.12~0.25%, Si:1.20~2.0%, Mn:1.15~2.5%, P :≤0.025%, S :≤
0.0030%, Als: 0.015~0.065%, Nb :≤0.055%；
The high silicon hot forming steel continuous casting producing method following steps:
Molten iron pre-processes (KR) → top and bottom combined blown converter → Argon station → ladle refining (LF) → molten steel and is vacuum-treated (RH)
→ slab caster → hot charging.
Wherein,
The continuous casting steel billet specifications section of continuous casting are as follows: thickness (210~250) × width (900~1600) mm2。
Its chemical component weight percentage content of the crystallizer protecting residue of continuous casting in slab caster are as follows:
SiO2: 26~32%, MgO:3~7%, CaO:31~37%, Fe2O3:≤3%, Al2O3:≤4%, R2O:8~
12%, F-:4.5~8.5%, H2O :≤0.5%, C (Gu): 4~8%.Crystallizer protecting residue basicity R (CaO/SiO2) it is 1.29
±0.05。
As depicted in figs. 1 and 2,
The Water Rate for Secondary Cooling Water that crystallizer 1 uses in slab caster are as follows: 0.61 ± 0.05L/Kg and poring rate are 1.0
~1.3m/min.
Two cold electromagnetism roller techniques, technological parameter are used in slab caster specifically: first pair of 3 electricity of electromagnetic stirring roller
Stream/frequency is respectively 200~300A/2~4Hz；Second pair of 4 electric currents of electromagnetic stirring roller/frequency be respectively 300~400A/3~
5Hz；Electromagnetic stirring roller installation site is in 3.5~8m apart from 2 vertical range of crystallizer meniscus.
Dynamic soft-reduction technique, technological parameter are used in slab caster specifically: overall reduction is 4.0~5.5mm；
Pressure range is solid rate (fS) 10%~80%；Reduction ratio is 0.8~1.5mm/m；
Slab hot charging temperature is 400 DEG C~680 DEG C, and temperature measurement location is at a of slab upper surface centre.High silicon hot forming steel casting
Base center segregation stability contorting is in C0.5-C1.5, and casting billet surface is without longitudinal crack and deep oscillation mark defect, and slab is without phenomenon of rupture, warm
Roll volume surface quality with it is functional.
Preferred embodiment are as follows:
Embodiment 1:
The high silicon hot forming steel that production specification is 230mm × 1400mm, carbon content 0.17%, silicone content are 2.0%, is poured
Teeming speed degree is 1.2m/min.Crystallizer protecting residue basicity is 1.28；Water Rate for Secondary Cooling Water is 0.60L/Kg；First pair of electromagnetic stirring roller
Being mounted on apart from crystallizer meniscus vertical range is at 4.5m, and second pair of electromagnetic stirring roller is mounted on apart from crystallizer meniscus
Vertical range is at 7.2m, and first pair is respectively 250A/3Hz, 350A/4Hz with second pair of electromagnetic stirring roller electric current and frequency；It is dynamic
State slighter compress overall reduction is 5.5mm, and pressure range is solid rate 20%~65%, reduction ratio 1.0mm/m.Hot charging temperature is
512℃。
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:
The high silicon hot forming steel that production specification is 220mm × 1600mm, carbon content 0.19%, silicone content are 1.8%, is poured
Teeming speed degree is 1.1m/min.Crystallizer protecting residue basicity is 1.27；Water Rate for Secondary Cooling Water is 0.60L/Kg；First pair of electromagnetic stirring roller
Being mounted on apart from crystallizer meniscus vertical range is at 4.5m, and second pair of electromagnetic stirring roller is mounted on apart from crystallizer meniscus
Vertical range is at 7.2m, and first pair is respectively 220A/2.5Hz, 330A/3Hz with second pair of electromagnetic stirring roller electric current and frequency；
Dynamic soft-reduction overall reduction is 5.5mm, and pressure range is solid rate 20%~65%, reduction ratio 1.0mm/m.Hot charging temperature
It is 560 DEG C.
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.
It above are only and preferred embodiments of the present invention are illustrated, above-mentioned technical characteristic can form multiple hairs in any combination
Bright example scheme.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, if use the improvement for the various unsubstantialities that conception and technical scheme of the invention carry out, or it is not improved will
Conception and technical scheme of the invention directly apply to other occasions, within the scope of the present invention.
Claims (8)
1. a kind of high silicon hot forming steel continuous casting producing method, it is characterised in that:
Described high its chemical component weight percentage content of silicon hot forming steel are as follows:
C:0.12~0.25%, Si:1.20~2.0%, Mn:1.15~2.5%, P :≤0.025%, S :≤0.0030%, Als:
0.015~0.065%, Nb :≤0.055%；
The production method the following steps are included:
Molten iron pretreatment → top and bottom combined blown converter → Argon station → ladle refining → molten steel vacuum processing → slab caster → heat
Dress.
2. high silicon hot forming steel continuous casting producing method as described in claim 1, it is characterised in that: the continuous casting steel of the continuous casting
Base specifications section are as follows: thickness (210~250) × width (900~1600) mm2。
3. high silicon hot forming steel continuous casting producing method as described in claim 1, it is characterised in that: continuous casting in the slab caster
Crystallizer protecting residue its chemical component weight percentage content are as follows:
SiO2: 26~32%, MgO:3~7%, CaO:31~37%, Fe2O3:≤3%, Al2O3:≤4%, R2O:8~12%,
F:4.5~8.5%, H2O :≤0.5%, C:4~8%.
4. high silicon hot forming steel continuous casting producing method as described in claim 1, it is characterised in that: used in the slab caster
Water Rate for Secondary Cooling Water are as follows: 0.61 ± 0.05L/Kg and poring rate are 1.0~1.3m/min.
5. high silicon hot forming steel continuous casting producing method as described in claim 1, it is characterised in that: used in the slab caster
Two cold electromagnetism roller techniques, technological parameter specifically: first pair of electromagnetic stirring roller electric current/frequency be respectively 200~300A/2~
4Hz；Second pair of electromagnetic stirring roller electric current/frequency is respectively 300~400A/3~5Hz.
6. high silicon hot forming steel continuous casting producing method as described in claim 1, it is characterised in that: used in the slab caster
Dynamic soft-reduction technique, technological parameter specifically: overall reduction is 4.0~5.5mm；Pressure range is solid rate (fS) 10%
~80%；Reduction ratio is 0.8~1.5mm/m.
7. high silicon hot forming steel continuous casting producing method as described in claim 1, it is characterised in that: the slab hot charging temperature is
400 DEG C~680 DEG C.
8. high silicon hot forming steel continuous casting producing method as claimed in claim 3, it is characterised in that: the crystallizer protecting residue basicity
R(CaO/SiO2) it is 1.29 ± 0.05.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876678A (en) * | 2020-07-14 | 2020-11-03 | 马鞍山钢铁股份有限公司 | Process method for solving cracks of high-strength steel casting blank |
| CN112045157A (en) * | 2020-07-24 | 2020-12-08 | 邯郸钢铁集团有限责任公司 | Production method of low-alloy high-strength wear-resistant steel slab |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109536666A (en) * | 2018-12-24 | 2019-03-29 | 马鞍山钢铁股份有限公司 | A kind of high silicon hot forming steel continuous casting producing method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109536666A (en) * | 2018-12-24 | 2019-03-29 | 马鞍山钢铁股份有限公司 | A kind of high silicon hot forming steel continuous casting producing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876678A (en) * | 2020-07-14 | 2020-11-03 | 马鞍山钢铁股份有限公司 | Process method for solving cracks of high-strength steel casting blank |
| CN112045157A (en) * | 2020-07-24 | 2020-12-08 | 邯郸钢铁集团有限责任公司 | Production method of low-alloy high-strength wear-resistant steel slab |
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Application publication date: 20190920 |
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