CN103938072A - Electrical steel plate and production method thereof - Google Patents
Electrical steel plate and production method thereof Download PDFInfo
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- CN103938072A CN103938072A CN201410142909.0A CN201410142909A CN103938072A CN 103938072 A CN103938072 A CN 103938072A CN 201410142909 A CN201410142909 A CN 201410142909A CN 103938072 A CN103938072 A CN 103938072A
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Abstract
The invention relates to an electrical steel plate and a production method thereof. The electrical steel plate comprises the following components in percentage by weight: less than or equal to 0.0060% of C, 1.10-1.30% of Si, 0.60-0.70% of Mn, less than or equal to 0.10% of P, less than or equal to 0.0080% of S, 0.20-0.50% of Als and the balance of Fe and inevitable impure elements. The non-oriented electrical steel plate which is excellent in performance is high in magnetic strength and low in iron loss. Compared with the prior art, the invention provides a manufacturing process of the conventional non-oriented electrical steel plate which is excellent in sheet billet continuous casting and rolling production performance for the first time and provides a technical support to produce a hot rolling raw material of high-grade non-oriented electrical steel plate which is excellent in environment-friendliness for the sheet billet continuous casting and rolling production line. Meanwhile, the CSP (Chip Scale Package) process product manufacturing range is further expanded and non-oriented electrical steel products which are excellent in performance in batches are provided to the downriver user electric motor manufacture industry through subsequent acid pickling, cold-rolling and continuous annealing production.
Description
Technical field
The present invention relates to a kind of electrical sheet and production method thereof, relate in particular to a kind of non-oriented electromagnetic steel sheet of excellent property and the method that adopts continuous casting and rolling technique of sheet bar to produce this electrical sheet.
Background technology
The continuous casting and rolling technique of sheet bar of manufacturing one of novel process as Iron And Steel Industry strip series products, is at home and abroad developed rapidly in recent years.But due to equipment configuration and the reason such as technique is immature, sheet billet continuous casting and rolling production line there is no the precedent of the electrical steel that production performance is good, and the electrical sheet of the excellent property of mass market urgent need cannot be provided.
Summary of the invention
The object of the present invention is to provide a kind of non-oriented electrical steel of excellent property, another object of the present invention is to provide the method that uses continuous casting and rolling technique of sheet bar to produce this steel plate.
Concrete technical scheme is as follows:
A kind of electrical sheet, its composition according to mass percent is: C≤0.0060%, Si1.10～1.30%, Mn0.60～0.70%, P≤0.10%, S≤0.0080%, Als0.20～0.50%, all the other are Fe and inevitable impurity element.
Further, its composition is C0.0034% according to mass percent, Si1.19%, Mn0.62%, P0.081%, S0.0022%, Als0.26%.
Further, its composition is C0.0057% according to mass percent, Si1.36%, Mn0.69%, P0.068%, S0.0045%, Als0.39%.
Further, it is non-oriented electromagnetic steel sheet.
The production method of above-mentioned electrical sheet, adopts CSP continuous casting and rolling technique of sheet bar.
Further, before tandem rolling, comprise the steps:
(1) converter smelting;
(2) ladle argon-blown;
(3) RH vacuum-treat;
(4) LF stove is concise;
(5) continuous casting.
Further, in tandem rolling: a, temperature schedule are: 1150 ± 20 DEG C of heating of continuous tunnel furnace, 1070 ± 30 DEG C of start rolling temperatures, 850～900 DEG C of finishing temperatures, 650～700 DEG C of coiling temperatures; B, reduction system are: the relative draft 40-65% of front 2 frame, the relative draft 15-35% of relative draft the 30～45%, 6th frame of 3rd～5 frame, relative draft≤20% of the 7th frame.
Further, in casting process, molten steel overheat is controlled at non-oriented electromagnetic steel sheet liquidus line+15-30 DEG C, and casting process adopts sinusoidal mold oscillation curve, 260-300 time/s of sinusoidal mold oscillation curve vibrational frequency, amplitude 6-7mm, pulling speed of continuous casting is controlled at 3.0-4.5m/min.
Further, hot rolled coil becomes the chill volume of 0.5mm through the reciprocating cold-rolling mill rolling of single chassis, enters follow-up continuous annealing+painting insulation layer production line, produces non-oriented electrical steel finished steel coils.
Further, the secondary descaling steel of cooling between cooling employing frame in tandem rolling, F1～F2 and F2～F3, it is cooling that back segment is cooled to laminar flow.
Compared with currently available technology, the high magnetic strength of excellent property non-oriented electromagnetic steel sheet of the present invention, low iron loss, compared with prior art, the present invention has proposed the manufacturing process of the good non-oriented electromagnetic steel sheet of a kind of CSP production performance first, produce the more high-grade good non-oriented electrical steel hot rolling of environmental-protecting performance raw material for CSP line technical guarantee is provided, also further expanded CSP handicraft product and manufactured scope simultaneously, and produce by follow-up pickling and cold-rolling and continuous annealing, provide excellent property non-oriented electrical steel product in downstream user motor manufacturing in batches.
Embodiment
Be a kind of preferred embodiment in numerous embodiments of the present invention below.
A non-oriented electromagnetic steel sheet for excellent property, its composition quality per-cent is: C≤0.0060%, Si1.10～1.30%, Mn0.60～0.70%, P≤0.10%, S≤0.0080%, Als0.20～0.50%, all the other are Fe and inevitable impurity element.Produce the method for this non-oriented electromagnetic steel sheet, described electrical sheet is produced with CSP continuous casting and rolling technique of sheet bar.In described casting process, molten steel overheat is controlled at the non-oriented electromagnetic steel sheet liquidus line+15-30 DEG C of excellent property, casting process adopts sinusoidal mold oscillation curve, 260-300 time/s of described sinusoidal mold oscillation curve vibrational frequency, amplitude 6-7mm, pulling speed of continuous casting is controlled at 3.0-4.5m/min; Crystallizer protecting residue is MBG-1 type electrical steel mould flux (manufacturer: the new steel refractory Company in Xinyu, Jiangsu), and it is strong that this mould flux capacity of heat transmission is strong, few to the carburetting of molten steel, absorption is mingled with ability.Described continuous rolling process system is: a, temperature schedule are: 1150 ± 20 DEG C of heating of continuous tunnel furnace, 1070 ± 30 DEG C of start rolling temperatures, 850～900 DEG C of finishing temperatures, 650～700 DEG C of coiling temperatures, b, reduction system are: the relative draft 40-65% of front 2 frame, the relative draft 30～45% of 3rd～5 frame, the relative draft 15-35% of the 6th frame, relative draft≤20% of the 7th frame, c, adopts the secondary descaling steel of cooling between frame, F1～F2 and F2～F3, and it is cooling that back segment is cooled to laminar flow.
Preferred embodiment 1
The chemical composition of excellent property non-oriented electromagnetic steel sheet of the present invention is in table 3, production method CSP explained hereafter.First, through 120 tons of converter smeltings, concise through ladle argon-blown, RH vacuum-treat and LF stove, molten steel overheat is controlled at excellent property non-oriented electromagnetic steel sheet liquidus line+15 DEG C; Casting process adopts sinusoidal mold oscillation curve, 270 times/S of described sinusoidal mold oscillation curve vibrational frequency, and amplitude 6.4mm, pulling speed of continuous casting is controlled at 4.2m/min, and crystallizer protecting residue is MBG-1 type electrical steel mould flux; After continuous tunnel furnace soaking, enter 7 frame tandem mill group rollings, roll process system is: a, temperature schedule are: 1140 DEG C of heating of continuous tunnel furnace, 1050 DEG C of start rolling temperatures, 860 DEG C of finishing temperatures, 660 DEG C of coiling temperatures, b, reduction system are: the relative draft 45% of front 2 frame, the relative draft 35% of 3rd～5 frame, the relative draft 10% of relative draft 15%, the 7 frame of the 6th frame, c, adopts the secondary descaling steel of cooling between frame, F1～F2 and F2～F3, it is cooling that back segment is cooled to laminar flow, hot rolling thickness specification 2.2mm.Hot rolled coil becomes the chill volume of 0.5mm through single-stand cold-rolling machine rolling, enter follow-up continuous annealing+painting insulation layer production line, produces excellent property non-oriented electrical steel finished steel coils.
Preferred embodiment 2
The chemical composition of excellent property non-oriented electromagnetic steel sheet of the present invention is in table 3, production method CSP explained hereafter.First, through 120 tons of converter smeltings, concise through ladle argon-blown, RH vacuum-treat and LF stove, molten steel overheat is controlled at excellent property non-oriented electromagnetic steel sheet liquidus line+28 DEG C; Casting process adopts sinusoidal mold oscillation curve, 300 times/S of described sinusoidal mold oscillation curve vibrational frequency, and amplitude 6.8mm, pulling speed of continuous casting is controlled at 3.3m/min, and crystallizer protecting residue is MBG-1 type electrical steel mould flux; After continuous tunnel furnace soaking, enter 7 frame tandem mill group rollings, roll process system is: a, temperature schedule are: 1170 DEG C of heating of continuous tunnel furnace, 1090 DEG C of start rolling temperatures, 890 DEG C of finishing temperatures, 690 DEG C of coiling temperatures, b, reduction system are: the relative draft 60% of front 2 frame, the relative draft 40% of 3rd～5 frame, the relative draft 18% of relative draft 30%, the 7 frame of the 6th frame, c, adopts the secondary descaling steel of cooling between frame, F1～F2 and F2～F3, it is cooling that back segment is cooled to laminar flow, hot rolling thickness specification 2.2mm.Hot rolled coil becomes the chill volume of 0.5mm through the reciprocating cold-rolling mill rolling of single chassis, enter follow-up continuous annealing+painting insulation layer production line, produces excellent property non-oriented electrical steel finished steel coils.
Table 3 excellent property electrical steel composition of steel, %
| ? | C | Si | Mn | P | S | Als |
| Embodiment 1 | 0.0034 | 1.19 | 0.62 | 0.081 | 0.0022 | 0.26 |
| Embodiment 2 | 0.0057 | 1.36 | 0.69 | 0.068 | 0.0045 | 0.39 |
Excellent property non-oriented electromagnetic steel sheet finished product magnetic property is in table 1, and mechanical property is in table 2.
Table 1 excellent property electrical steel steel plate magnetic property
| ? | Thickness (mm) | P 1.5/50(W/kg) | B 50(T) |
| Prior art | 0.5 | 3.90～4.20 | 1.69～1.73 |
?
| Embodiment 1 | 0.5 | 3.826 | 1.741 |
| Embodiment 2 | 0.5 | 3.689 | 1.746 |
Table 2 excellent property electrical steel mechanical property of steel plate
| ? | Rp0.2(MPa) | Rm(MPa) | A 50(%) | HV1 |
| Embodiment 1 | 275 | 394 | 34.0 | 125 |
| Embodiment 2 | 283 | 411 | 33.1 | 131 |
Above the present invention is exemplarily described; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as the various improvement that adopted method of the present invention design and technical scheme to carry out, or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (10)
1. an electrical sheet, is characterized in that, its composition according to mass percent is: C≤0.0060%, and Si1.10～1.30%, Mn0.60～0.70%, P≤0.10%, S≤0.0080%, Als0.20～0.50%, all the other are Fe and inevitable impurity element.
2. electrical sheet as claimed in claim 1, is characterized in that, its composition is C0.0034% according to mass percent, Si1.19%, Mn0.62%, P0.081%, S0.0022%, Als0.26%.
3. electrical sheet as claimed in claim 1, is characterized in that, its composition is C0.0057% according to mass percent, Si1.36%, Mn0.69%, P0.068%, S0.0045%, Als0.39%.
4. the electrical sheet as described in any one in claim 1-3, is characterized in that, it is non-oriented electromagnetic steel sheet.
5. the production method of electrical sheet as described in claim 1-4, is characterized in that, adopts CSP continuous casting and rolling technique of sheet bar.
6. electrical sheet production method as claimed in claim 5, is characterized in that, before tandem rolling, comprises the steps:
(1) converter smelting;
(2) ladle argon-blown;
(3) RH vacuum-treat;
(4) LF stove is concise;
(5) continuous casting.
7. electrical sheet production method as described in claim 5 or 6, is characterized in that, in tandem rolling:
A, temperature schedule are: 1150 ± 20 DEG C of heating of continuous tunnel furnace, 1070 ± 30 DEG C of start rolling temperatures, 850～900 DEG C of finishing temperatures, 650～700 DEG C of coiling temperatures;
B, reduction system are: the relative draft 40-65% of front 2 frame, the relative draft 15-35% of relative draft the 30～45%, 6th frame of 3rd～5 frame, relative draft≤20% of the 7th frame.
8. the electrical sheet production method as described in any one in claim 5-7, it is characterized in that, in casting process, molten steel overheat is controlled at non-oriented electromagnetic steel sheet liquidus line+15-30 DEG C, casting process adopts sinusoidal mold oscillation curve, 260-300 time/s of sinusoidal mold oscillation curve vibrational frequency, amplitude 6-7mm, pulling speed of continuous casting is controlled at 3.0-4.5m/min.
9. the electrical sheet production method as described in any one in claim 5-8, it is characterized in that, hot rolled coil becomes the chill volume of 0.5mm through the reciprocating cold-rolling mill rolling of single chassis, enter follow-up continuous annealing+painting insulation layer production line, produces non-oriented electrical steel finished steel coils.
10. the electrical sheet production method as described in any one in claim 5-9, is characterized in that, the secondary descaling steel of cooling between cooling employing frame in tandem rolling, F1～F2 and F2～F3, and it is cooling that back segment is cooled to laminar flow.
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| CN201410142909.0A CN103938072A (en) | 2014-04-10 | 2014-04-10 | Electrical steel plate and production method thereof |
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| CN201410142909.0A CN103938072A (en) | 2014-04-10 | 2014-04-10 | Electrical steel plate and production method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779879A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Production method of cold-rolled non-oriented electrical steel thin strip |
| CN105779878A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Production method of medium-frequency cold-rolled non-oriented silicon steel strip |
| CN107723590A (en) * | 2017-09-28 | 2018-02-23 | 马钢(集团)控股有限公司 | A kind of transformer cold-rolled orientation electrical sheet and its production method |
| CN108127093A (en) * | 2017-12-21 | 2018-06-08 | 武汉钢铁有限公司 | The method for eliminating non-oriented electromagnetic steel sheet volume surface chromatic aberration defect |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088253A (en) * | 2013-02-17 | 2013-05-08 | 马钢(集团)控股有限公司 | Non-oriented electrical steel plate and production method thereof |
-
2014
- 2014-04-10 CN CN201410142909.0A patent/CN103938072A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088253A (en) * | 2013-02-17 | 2013-05-08 | 马钢(集团)控股有限公司 | Non-oriented electrical steel plate and production method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779879A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Production method of cold-rolled non-oriented electrical steel thin strip |
| CN105779878A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Production method of medium-frequency cold-rolled non-oriented silicon steel strip |
| CN107723590A (en) * | 2017-09-28 | 2018-02-23 | 马钢(集团)控股有限公司 | A kind of transformer cold-rolled orientation electrical sheet and its production method |
| CN108127093A (en) * | 2017-12-21 | 2018-06-08 | 武汉钢铁有限公司 | The method for eliminating non-oriented electromagnetic steel sheet volume surface chromatic aberration defect |
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