CN105177442A - Low-alloy high-strength steel billet and manufacturing method thereof - Google Patents
Low-alloy high-strength steel billet and manufacturing method thereof Download PDFInfo
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- CN105177442A CN105177442A CN201510509727.7A CN201510509727A CN105177442A CN 105177442 A CN105177442 A CN 105177442A CN 201510509727 A CN201510509727 A CN 201510509727A CN 105177442 A CN105177442 A CN 105177442A
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Abstract
The invention provides a low-alloy high-strength steel billet. The low-alloy high-strength steel billet comprises, by mass, 0.21-0.25% of C, 0.3-0.5% of Si, 0.85-1.2% of Mn, less than or equal to 0.045% of P, less than or equal to 0.20% of Cr, less than or equal to 0.10% of Ni, less than or equal to 0.20% of Cu, less than or equal to 0.53% of Ceq, and the balance Fe and inevitable microelements. The quality of the low-alloy high-strength steel billet produced through the optimized process is obviously improved, and the added amount of ferromanganese is reduced by 3-4 kg/t; the incidence rate of white flake defects is zero, the subsurface blowhole and nonmetallic inclusion standard exceeding comprehensive defective rate is reduced to below 0.3%, cost is lowered, and quality is improved.
Description
Technical field
The present invention relates to low alloy steel field, particularly relate to a kind of low-alloy high-strength steel steel billet and manufacture method thereof.
Background technology
Low-alloy high-strength steel steel billet adopts converter smelting and without LF refining, billet specification 165*165, molten steel is temperature uneven components in casting process, a large amount of alloying element need be added to be rolled into design strength steel, especially in steel, [Mn] content will reach 1.1% ~ 1.35%, need add ferromanganese 18kg/t ~ 22kg/t, and continuously cast bloom low multiple quality is not good enough, subsurface bubble, non-metallic inclusion exceed standard, there is white point, cause comprehensive disqualification rate more than 5%.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art, the object of the invention is to, a kind of low-alloy high-strength steel steel billet is provided, comprises the chemical composition of following mass percent: C:0.21 ~ 0.25, Si:0.3 ~ 0.5, Mn:0.85 ~ 1.2, P≤0.045, Cr≤0.20, Ni≤0.10, Cu≤0.20, Ceq≤0.53, surplus are Fe and inevitable trace element.
Preferably, comprise the chemical composition of following mass percent: C:0.21, Si:0.4, Mn:0.9, P:0.035, Cr:0.18, Ni:0.10, Cu:0.17, Ceq:0.51, surplus be Fe and inevitably trace element.
Preferably, comprise the chemical composition of following mass percent: C:0.23, Si:0.5, Mn:1.1, P:0.037, C:0.20, Ni:0.07, Cu:0.12, Ceq:0.45, surplus be Fe and inevitably trace element.
Preferably, comprise the chemical composition of following mass percent: C:0.25, Si:0.3, Mn:0.9, P:0.045, Cr:0.15, Ni:0.08, Cu:0.:15, Ceq:0.5:, surplus be Fe and inevitably trace element.
Preferably, comprise the chemical composition of following mass percent: C:0.24, Si:0.37, Mn:0.98, P:0.032, Cr:0.12, Ni:0.03, Cu:0.1, Ceq:0.33, surplus be Fe and inevitably trace element.
Preferably, comprise the chemical composition of following mass percent: C:0.221, Si:0.45, Mn:0.87, P:0.027, Cr:0.1, Ni:0.025, Cu:0.13, Ceq:0.27, surplus be Fe and inevitably trace element.
A manufacture method for low-alloy high-strength steel steel billet, comprises the steps:
Hot metal pretreatment: before molten iron enters electrosmelting, carries out taking off front slag and taking off rear slag, and the hot metal composition that arrives at a station ensures thickness of slag layer < 50mm, temperature > 1300 DEG C;
Converter smelting process: P < 0.15%, S < 0.06% in molten iron, converting process adopts low-Gao-low rifle position to control, finishing slag basicity 3 ~ 4, and tapping process deoxidation alloying, utilizes slag-blocking ball slag-stopping tapping, forbids slag of tapping;
LF refining: the omnidistance Argon of refining process, change slag and alloying guarantee argon blowing rate > 600L/min, soft blow flow 80 ~ 100L/min, white slag refining time > 10min, soft blow time > 5min, refining process deoxidation is based on silicon carbide, and aluminum shot is auxiliary;
Continuous casting: casting process adopts whole process protection cast, middle bag superheating temperature 20 ~ 30 DEG C, permanent pulling rate casting, and coordinate first and end induction stirring, reduce strand column crystal rate, improve Center Equiaxial Crystal rate, adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection, pulling rate 1.8 ~ 2.0m/min, M-EMS Current 320A, frequency 4Hz, end induction stirring electric current 300A, frequency 3Hz, crystallizer water yield 140m
3/ h, two cold specific water 0.4L/Kg.
Preferably, adopt M-EMS and F-EMS first and last to coordinate induction stirring, formulate rational secondary cooling system, ensure front temperature >=930 DEG C of aligning.
As can be seen from the above technical solutions, the present invention has the following advantages:
By optimize rear explained hereafter low-alloy high-strength steel billet quality be improved significantly, ferromanganese add-on reduces 3kg/t ~ 4kg/t; White-spot defects incidence is 0, and subsurface bubble and the non-metallic inclusion comprehensive disqualification rate that exceeds standard is reduced to less than 0.3%, reduces cost, improves quality.
Embodiment
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable; specific embodiment will be used below; the technical scheme of the present invention's protection is clearly and completely described; obviously; the embodiments described below are only the present invention's part embodiments, and the embodiment of not all.Based on the embodiment in this patent, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of this patent protection.
The invention provides a kind of low-alloy high-strength steel steel billet, comprise the chemical composition of following mass percent: C:0.21 ~ 0.25, Si:0.3 ~ 0.5, Mn:0.85 ~ 1.2, P≤0.045, Cr≤0.20, Ni≤0.10, Cu≤0.20, Ceq≤0.53, surplus are Fe and inevitable trace element.
The present invention also provides a kind of manufacture method of low-alloy high-strength steel steel billet, comprises the steps:
Hot metal pretreatment: before molten iron enters electrosmelting, carries out taking off front slag and taking off rear slag, and the hot metal composition that arrives at a station ensures thickness of slag layer < 50mm, temperature > 1300 DEG C;
Converter smelting process: P < 0.15% in molten iron, S < 0.06%, molten iron and steel scrap Intake Quantity error ± 2t, converting process adopts low-Gao-low rifle position to control, finishing slag basicity 3 ~ 4, tapping process deoxidation alloying, utilizes slag-blocking ball slag-stopping tapping, forbid tap slag;
LF refining: the omnidistance Argon of refining process, change slag and alloying guarantee argon blowing rate > 600L/min, soft blow flow 80 ~ 100L/min, white slag refining time > 10min, soft blow time > 5min
promote inclusion floating,refining process deoxidation is based on silicon carbide, and aluminum shot is auxiliary;
Continuous casting: casting process adopts whole process protection cast, middle bag superheating temperature 20 ~ 30 DEG C, permanent pulling rate casting, and coordinate first and end induction stirring, reduce strand column crystal rate, improve Center Equiaxial Crystal rate, adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection; pulling rate 1.8 ~ 2.0m/min; M-EMS Current 320A; frequency 4Hz; end induction stirring electric current 300A; frequency 3Hz, crystallizer water yield 140m3/h, two cold specific water 0.4L/Kg.
Continuous casting also comprises: adopt M-EMS(M-EMS) and F-EMS(solidification end induction stirring) first and last cooperation induction stirring, formulate rational secondary cooling system, ensure front temperature >=930 DEG C of aligning.
Casting process whole process protection is poured into a mould, and low overheat, permanent pulling rate are cast, and coordinate first and end induction stirring, reduces strand column crystal rate, improves Center Equiaxial Crystal rate;
Casting process sfgd.: adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection;
By optimizing just refining, refining and continuous casting process, reduce alloy addition, cost-saving, promote that molten steel inclusion floats, accelerate the discharge of gas [H], [O] in steel, do not falling under low intensive prerequisite, by improving molten steel cleanness, reduce manganeseirom add-on, improve continuous casting billet quality.
By optimize rear explained hereafter low-alloy high-strength steel billet quality be improved significantly, ferromanganese add-on reduces 3kg/t ~ 4kg/t; White-spot defects incidence is 0, and subsurface bubble and the non-metallic inclusion comprehensive disqualification rate that exceeds standard is reduced to less than 0.3%, reduces cost, improves quality.
Embodiment one:
A kind of low-alloy high-strength steel steel billet, the chemical composition of mass percent is: C:0.21, Si:0.4, Mn:0.9, P:0.035, Cr:0.18, Ni:0.10, Cu:0.17, Ceq:0.51, surplus are Fe and inevitable trace element.
Manufacturing process wherein comprises:
Hot metal pretreatment: before molten iron enters electrosmelting, carry out taking off front slag and taking off rear slag, the hot metal composition that arrives at a station ensures that thickness of slag layer is 45mm, temperature 1450 DEG C;
Converter smelting process: in molten iron, P is 0.13%, S is 0.05%, molten iron and steel scrap Intake Quantity error ± 2t, converting process adopts low-Gao-low rifle position to control, and finishing slag basicity is 3.5, and tapping process deoxidation alloying utilizes slag-blocking ball slag-stopping tapping, forbids slag of tapping;
LF refining: the omnidistance Argon of refining process, changes slag and alloying ensures argon blowing rate 700L/min, soft blow flow 82L/min, white slag refining time 15min, soft blow time 6min,
promote inclusion floating,refining process deoxidation is based on silicon carbide, and aluminum shot is auxiliary;
Continuous casting: casting process adopts whole process protection cast, middle bag superheating temperature 25 DEG C, permanent pulling rate casting, and coordinate first and end induction stirring, reduce strand column crystal rate, improve Center Equiaxial Crystal rate, adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection, pulling rate 1.8m/min, M-EMS Current 320A, frequency 4Hz, end induction stirring electric current 300A, frequency 3Hz, crystallizer water yield 140m
3/ h, two cold specific water 0.4L/Kg.
Continuous casting also comprises: adopt M-EMS(M-EMS) and F-EMS(solidification end induction stirring) first and last cooperation induction stirring, formulate rational secondary cooling system, ensure the front temperature 980 DEG C of aligning.
Casting process whole process protection is poured into a mould, and low overheat, permanent pulling rate are cast, and coordinate first and end induction stirring, reduces strand column crystal rate, improves Center Equiaxial Crystal rate;
Casting process sfgd.: adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection.
Embodiment two:
A kind of low-alloy high-strength steel steel billet, the chemical composition of mass percent is: C:0.23, Si:0.5, Mn:1.1, P:0.037, C:0.20, Ni:0.07, Cu:0.12, Ceq:0.45, surplus are Fe and inevitable trace element.
Manufacturing process wherein comprises:
Hot metal pretreatment: before molten iron enters electrosmelting, carry out taking off front slag and taking off rear slag, the hot metal composition that arrives at a station ensures thickness of slag layer 42mm, temperature 1500 DEG C;
Converter smelting process: in molten iron, P is 0.11%, S is 0.03%, converting process adopts low-Gao-low rifle position to control, finishing slag basicity 3.5, and tapping process deoxidation alloying, utilizes slag-blocking ball slag-stopping tapping, forbids slag of tapping;
LF refining: the omnidistance Argon of refining process, changes slag and alloying ensures argon blowing rate 800L/min, soft blow flow 100L/min, white slag refining time 20min, soft blow time 7min, and refining process deoxidation is based on silicon carbide, and aluminum shot is auxiliary;
Continuous casting: casting process adopts whole process protection cast, middle bag superheating temperature 30 DEG C, permanent pulling rate casting, and coordinate first and end induction stirring, reduce strand column crystal rate, improve Center Equiaxial Crystal rate, adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection, pulling rate 1.9m/min, M-EMS Current 320A, frequency 4Hz, end induction stirring electric current 300A, frequency 3Hz, crystallizer water yield 140m
3/ h, two cold specific water 0.4L/Kg.
Adopt M-EMS and F-EMS first and last to coordinate induction stirring, formulate rational secondary cooling system, ensure the front temperature 1000 DEG C of aligning.
Casting process whole process protection is poured into a mould, and low overheat, permanent pulling rate are cast, and coordinate first and end induction stirring, reduces strand column crystal rate, improves Center Equiaxial Crystal rate;
Casting process sfgd.: adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection.
Embodiment three:
A kind of low-alloy high-strength steel steel billet, the chemical composition of mass percent is: C:0.25, Si:0.3, Mn:0.9, P:0.045, Cr:0.15, Ni:0.08, Cu:0.:15, Ceq:0.5:, surplus is Fe and inevitable trace element.
Manufacturing process wherein comprises:
Hot metal pretreatment: before molten iron enters electrosmelting, carry out taking off front slag and taking off rear slag, the hot metal composition that arrives at a station ensures thickness of slag layer 48mm, temperature 1530 DEG C;
Converter smelting process: in molten iron, P is 0.11%, S is 0.04%, converting process adopts low-Gao-low rifle position to control, finishing slag basicity 3.7, and tapping process deoxidation alloying, utilizes slag-blocking ball slag-stopping tapping, forbids slag of tapping;
LF refining: the omnidistance Argon of refining process, changes slag and alloying ensures argon blowing rate 700L/min, soft blow flow 87L/min, white slag refining time 12min, soft blow time 6min, and refining process deoxidation is based on silicon carbide, and aluminum shot is auxiliary;
Continuous casting: casting process adopts whole process protection cast, middle bag superheating temperature 27 DEG C, permanent pulling rate casting, and coordinate first and end induction stirring, reduce strand column crystal rate, improve Center Equiaxial Crystal rate, adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection, pulling rate 1.88m/min, M-EMS Current 320A, frequency 4Hz, end induction stirring electric current 300A, frequency 3Hz, crystallizer water yield 140m
3/ h, two cold specific water 0.4L/Kg.
Adopt M-EMS and F-EMS first and last to coordinate induction stirring, formulate rational secondary cooling system, ensure the front temperature 950 DEG C of aligning.
Casting process whole process protection is poured into a mould, and low overheat, permanent pulling rate are cast, and coordinate first and end induction stirring, reduces strand column crystal rate, improves Center Equiaxial Crystal rate;
Casting process sfgd.: adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection.
Embodiment four:
A kind of low-alloy high-strength steel steel billet, the chemical composition of mass percent is: C:0.24, Si:0.37, Mn:0.98, P:0.032, Cr:0.12, Ni:0.03, Cu:0.1, Ceq:0.33, surplus are Fe and inevitable trace element.
Manufacturing process wherein comprises:
Hot metal pretreatment: before molten iron enters electrosmelting, carry out taking off front slag and taking off rear slag, the hot metal composition that arrives at a station ensures thickness of slag layer 39mm, temperature 1600 DEG C;
Converter smelting process: in molten iron, P is 0.13%, S is 0.054%, converting process adopts low-Gao-low rifle position to control, finishing slag basicity 3.8, and tapping process deoxidation alloying, utilizes slag-blocking ball slag-stopping tapping, forbids slag of tapping;
LF refining: the omnidistance Argon of refining process, changes slag and alloying ensures argon blowing rate 800L/min, soft blow flow 90L/min, white slag refining time 17min, soft blow time 7min, and refining process deoxidation is based on silicon carbide, and aluminum shot is auxiliary;
Continuous casting: casting process adopts whole process protection cast, middle bag superheating temperature 27 DEG C, permanent pulling rate casting, and coordinate first and end induction stirring, reduce strand column crystal rate, improve Center Equiaxial Crystal rate, adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection, pulling rate 1.92m/min, M-EMS Current 320A, frequency 4Hz, end induction stirring electric current 300A, frequency 3Hz, crystallizer water yield 140m
3/ h, two cold specific water 0.4L/Kg.
Adopt M-EMS and F-EMS first and last to coordinate induction stirring, formulate rational secondary cooling system, ensure the front temperature 1050 DEG C of aligning.
Casting process whole process protection is poured into a mould, and low overheat, permanent pulling rate are cast, and coordinate first and end induction stirring, reduces strand column crystal rate, improves Center Equiaxial Crystal rate;
Casting process sfgd.: adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection.
Embodiment five:
A kind of low-alloy high-strength steel steel billet, the chemical composition of mass percent is: C:0.221, Si:0.45, Mn:0.87, P:0.027, Cr:0.1, Ni:0.025, Cu:0.13, Ceq:0.27, surplus are Fe and inevitable trace element.
Manufacturing process wherein comprises:
Hot metal pretreatment: before molten iron enters electrosmelting, carry out taking off front slag and taking off rear slag, the hot metal composition that arrives at a station ensures thickness of slag layer 35mm, temperature 1600 DEG C;
Converter smelting process: in molten iron, P is 0.13%, S is 0.04%, converting process adopts low-Gao-low rifle position to control, finishing slag basicity 4, and tapping process deoxidation alloying, utilizes slag-blocking ball slag-stopping tapping, forbids slag of tapping;
LF refining: the omnidistance Argon of refining process, changes slag and alloying ensures argon blowing rate 750L/min, soft blow flow 100L/min, white slag refining time 20min, soft blow time 6min, and refining process deoxidation is based on silicon carbide, and aluminum shot is auxiliary;
Continuous casting: casting process adopts whole process protection cast, middle bag superheating temperature 26 DEG C, permanent pulling rate casting, and coordinate first and end induction stirring, reduce strand column crystal rate, improve Center Equiaxial Crystal rate, adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection, pulling rate 2.0m/min, M-EMS Current 320A, frequency 4Hz, end induction stirring electric current 300A, frequency 3Hz, crystallizer water yield 140m
3/ h, two cold specific water 0.4L/Kg.
Adopt M-EMS and F-EMS first and last to coordinate induction stirring, formulate rational secondary cooling system, ensure the front temperature 1100 DEG C of aligning.
Casting process whole process protection is poured into a mould, and low overheat, permanent pulling rate are cast, and coordinate first and end induction stirring, reduces strand column crystal rate, improves Center Equiaxial Crystal rate;
Casting process sfgd.: adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection.
In this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, identical similar portion reference mutually between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a low-alloy high-strength steel steel billet, it is characterized in that, comprise the chemical composition of following mass percent: C:0.21 ~ 0.25, Si:0.3 ~ 0.5, Mn:0.85 ~ 1.2, P≤0.045, Cr≤0.20, Ni≤0.10, Cu≤0.20, Ceq≤0.53, surplus are Fe and inevitable trace element.
2. low-alloy high-strength steel steel billet according to claim 1, is characterized in that: the chemical composition comprising following mass percent: C:0.21, Si:0.4, Mn:0.9, P:0.035, V:0.0012, Cr:0.18, Ni:0.10, Cu:0.17, Ceq:0.51, surplus be Fe and inevitably trace element.
3. low-alloy high-strength steel steel billet according to claim 1, is characterized in that: the chemical composition comprising following mass percent: C:0.23, Si:0.5, Mn:1.1, P:0.037, C:0.20, Ni:0.07, Cu:0.12, Ceq:0.45, surplus be Fe and inevitably trace element.
4. low-alloy high-strength steel steel billet according to claim 1, is characterized in that: the chemical composition comprising following mass percent: C:0.25, Si:0.3, Mn:0.9, P:0.045, Cr:0.15, Ni:0.08, Cu:0.:15, Ceq:0.5:, surplus be Fe and inevitably trace element.
5. low-alloy high-strength steel steel billet according to claim 1, is characterized in that: the chemical composition comprising following mass percent: C:0.24, Si:0.37, Mn:0.98, P:0.032, Cr:0.12, Ni:0.03, Cu:0.1, Ceq:0.33, surplus be Fe and inevitably trace element.
6. low-alloy high-strength steel steel billet according to claim 1, it is characterized in that: the chemical composition comprising following mass percent: C:0.221, Si:0.45, Mn:0.87, P:0.027, Cr:0.1, Ni:0.025, Cu:0.13, Ceq:0.27, surplus be Fe and inevitably trace element.
7. a manufacture method for low-alloy high-strength steel steel billet, is characterized in that, comprises the steps:
Hot metal pretreatment: before molten iron enters electrosmelting, carries out taking off front slag and taking off rear slag, and the hot metal composition that arrives at a station ensures thickness of slag layer < 50mm, temperature > 1300 DEG C;
Converter smelting process: P < 0.15%, S < 0.06% in molten iron, converting process adopts low-Gao-low rifle position to control, finishing slag basicity 3 ~ 4, and tapping process deoxidation alloying, utilizes slag-blocking ball slag-stopping tapping, forbids slag of tapping;
LF refining: the omnidistance Argon of refining process, change slag and alloying guarantee argon blowing rate > 600L/min, soft blow flow 80 ~ 100L/min, white slag refining time > 10min, soft blow time > 5min, refining process deoxidation is based on silicon carbide, and aluminum shot is auxiliary;
Continuous casting: casting process adopts whole process protection cast, middle bag superheating temperature 20 ~ 30 DEG C, permanent pulling rate casting, and coordinate first and end induction stirring, reduce strand column crystal rate, improve Center Equiaxial Crystal rate, adopt large bag long nozzle and submerged nozzle to carry out protective casting; Double-layer tundish covering agent and low-alloy high-strength steel special crystallizer covering slag is adopted to carry out molten steel covering protection, pulling rate 1.8 ~ 2.0m/min, M-EMS Current 320A, frequency 4Hz, end induction stirring electric current 300A, frequency 3Hz, crystallizer water yield 140m
3/ h, two cold specific water 0.4L/Kg.
8. the manufacture method of low-alloy high-strength steel steel billet according to claim 7, it is characterized in that, continuous casting also comprises:
Adopt M-EMS and F-EMS first and last to coordinate induction stirring, formulate rational secondary cooling system, ensure front temperature >=930 DEG C of aligning.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803151A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Center porosity control method for 35CrMo round blooms with cross section diameter being 280 mm |
| CN105803149A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Equiaxial crystal ratio control method for 35CrMo round pipe billet with phi 280 mm |
| CN109504815A (en) * | 2018-11-16 | 2019-03-22 | 山东寿光巨能特钢有限公司 | A method of control large-sized annular forging low-alloy high-strength steel large round billet center porosity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018875A (en) * | 2005-03-16 | 2007-08-15 | 本田技研工业株式会社 | Method for heat-treating steel material |
| CN102345055A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | Weldable fine grain structural steel S355NL/S355NLZ35 steel plate and its production method |
| CN103556080A (en) * | 2013-10-24 | 2014-02-05 | 钢铁研究总院 | Mechanical property control method for directly rolling long profiles |
| CN104195282A (en) * | 2014-08-18 | 2014-12-10 | 山东西王特钢有限公司 | Zero-turriform-hairline control method of 35MnBM for engineering machinery |
-
2015
- 2015-08-19 CN CN201510509727.7A patent/CN105177442A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018875A (en) * | 2005-03-16 | 2007-08-15 | 本田技研工业株式会社 | Method for heat-treating steel material |
| CN102345055A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | Weldable fine grain structural steel S355NL/S355NLZ35 steel plate and its production method |
| CN103556080A (en) * | 2013-10-24 | 2014-02-05 | 钢铁研究总院 | Mechanical property control method for directly rolling long profiles |
| CN104195282A (en) * | 2014-08-18 | 2014-12-10 | 山东西王特钢有限公司 | Zero-turriform-hairline control method of 35MnBM for engineering machinery |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803151A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Center porosity control method for 35CrMo round blooms with cross section diameter being 280 mm |
| CN105803149A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Equiaxial crystal ratio control method for 35CrMo round pipe billet with phi 280 mm |
| CN105803151B (en) * | 2016-03-23 | 2018-05-25 | 攀钢集团攀枝花钢铁研究院有限公司 | The 35CrMo circular pipe blank center porosity control methods of φ 280mm |
| CN105803149B (en) * | 2016-03-23 | 2018-05-25 | 攀钢集团攀枝花钢铁研究院有限公司 | The 35CrMo circular pipe blank equiaxial crystal ratio control methods of φ 280mm |
| CN109504815A (en) * | 2018-11-16 | 2019-03-22 | 山东寿光巨能特钢有限公司 | A method of control large-sized annular forging low-alloy high-strength steel large round billet center porosity |
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Application publication date: 20151223 |