CN105779880A - Production method of cold-rolled high-grade non-oriented electrical steel thin strip - Google Patents
Production method of cold-rolled high-grade non-oriented electrical steel thin strip Download PDFInfo
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- CN105779880A CN105779880A CN201410810277.0A CN201410810277A CN105779880A CN 105779880 A CN105779880 A CN 105779880A CN 201410810277 A CN201410810277 A CN 201410810277A CN 105779880 A CN105779880 A CN 105779880A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 title claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000005097 cold rolling Methods 0.000 claims abstract description 20
- 238000000137 annealing Methods 0.000 claims abstract description 12
- 238000005098 hot rolling Methods 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 15
- 238000009749 continuous casting Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 5
- 229910001208 Crucible steel Inorganic materials 0.000 claims 1
- 238000003723 Smelting Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
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Abstract
The invention provides a production method of a cold-rolled high-grade non-oriented electrical steel thin strip, which comprises the following chemical components: c is less than or equal to 0.005%, Si: 1.70% -3.5%, Al: 0.4-1.0 percent of Mn, 0.30-0.80 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.0040 percent of N, heating a billet at 1050-1150 ℃ for 150-250 min, discharging, hot rolling at the initial rolling temperature of 980-1100 ℃, the final rolling temperature of 820-880 ℃, the coiling temperature of 700-760 ℃, and hot rolling to 1.5-3.0 mm; and (3) insulating the hot-rolled coil plate for 1.5-3.0 min at 900-980 ℃, uncoiling more than two steel coils with the same specification and components, stacking the steel coils together, cold-rolling the steel coils in a six-roller continuous rolling mill set at the thickness of 0.2-0.65 mm and the rolling speed of 400-800 m/min, and annealing the steel coils after coil splitting at the temperature of 900-1000 ℃ for 2-5 min. The invention not only improves the yield, but also reduces the roller consumption, rolls products with thinner specifications under the condition that the condition of the existing rolling mill is not changed, and further reduces the iron loss of finished products.
Description
Technical field
The present invention relates to the production method of cold rolling non-oriented electrical steel strip, particularly to the production method of a kind of cold rolling high grade non-oriented electrical steel strip.
Background technology
The content high grade cold rolling silicon steel more than 1.7% mainly adopts multi-frame tandem rolling mode for improving productivity ratio, in order to reduce edge thinning phenomenon, improves mill stiffness frequently with high-hardness roller milling train.For the higher silicon steel of the trade mark owing to hardness is higher, resistance of deformation increases, and generally adopts six-high cluster mill rolling, it is possible to the steel band of rolling about 0.3mm.
Due to steel plate plastic deformation in the operation of rolling, producing relative motion between steel plate and roll, particularly in steel band edge, steel band is very serious to the friction of roll.Due to roll wear, cause steel plate thickness to change, affect product quality.Although this phenomenon can be passed through to add rolling mill compound and reduce friction, make roll wear be alleviated, but can not eliminate.
Owing to silicon steel is for reducing iron loss, it is desirable to rolling the steel band of relatively Thin Specs, with the reduction of thickness, roll-force is multiplied, steel band edge is more serious to the friction of roll, adds the consumption of roll.
Summary of the invention
The present invention provides the production method of a kind of high grade cold rolling non-oriented electrical sheet strip, it is possible to improve yield, reduces roll consumption, and situation about remaining unchanged in existing milling train situation rolls out the product of more Thin Specs, reduces finished product iron loss further.
The object of the present invention is achieved like this, a kind of production method of the grade cold rolling non-oriented electrical sheet strip of cold rolling height, chemical composition: C≤0.005%, Si:1.70%～3.5%, Al:0.4%～1.0%, Mn:0.30%～0.80%, P≤0.020%, S≤0.015%, N≤0.0040%, all the other are Fe and inevitable impurity.
The process route of the present invention is: desulfurizing iron-converter smelting-RH refine-continuous casting and hot rolling-cold rolling-annealing-coating-service check-packaging, and concrete technology is as follows:
1. adopt continuous casting mode that molten steel is cast base；
2. steel billet heats, through 1050～1150 DEG C, rolling of coming out of the stove after 150～250min, and hot rolling start rolling temperature is 980～1100 DEG C, and finishing temperature is 820～880 DEG C, and coiling temperature is 700～760 DEG C, is hot-rolled down to 1.5～3.0mm；
3. hot-rolled coil is incubated after 1.5～3.0min normalizing processes cold rolling through 900～980 DEG C; by more than two volumes same specification and composition, (same specification finger widths, thickness are identical; same composition refers to the composition of same refining furnace steel) coil of strip uncoiling after be stacked together entrance six roller Continuous mill train carry out cold rolling; it is rolled into the steel band that thickness is 0.2～0.65mm; mill speed controls at 400～800m/min, afterwards trimming bundling；
4. being annealed after bundling, annealing temperature controls 900～1000 DEG C, and annealing time 2-5min makes the abundant recrystallization of deformed grains；
5. coating makes finished product.
The entrance of described six roller Continuous mill train adopts two coiling machines, the first volume is involved in first coiling machine after being rolled to finished product thickness 2 times, volume Two batches rolling with second coiling machine, and when identical with first volume thickness, the entrance milling train that is stacked together after coiling machine uncoiling while of two volumes is rolled to finished product thickness.
The entrance of described six roller Continuous mill train adopts three coiling machines, and every rolling is involved in three coiling machines respectively to finished product thickness 2 times；The entrance milling train that is stacked together after coiling machine uncoiling while of three volumes is rolled to finished product thickness.
Beneficial effects of the present invention: owing to the two above coil of strips of volume carry out ply rolling, alleviating the friction to roll of the steel band edge, reduce the consumption of roll, situation about remaining unchanged in existing milling train situation rolls out the product of more Thin Specs, reducing finished product iron loss further, electromagnetic performance is excellent；Ply rolling coil of strip be same specification and composition ensure that ply rolling after respectively roll up consistency of thickness, improve yield simultaneously.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but becomes any limitation of the invention not.
Embodiment 1
Material composition: C:0.003%, Si:2.25%, Al:0.45%, Mn:0.73%, P:0.007%, S:0.005%, N:0.0020%, all the other are Fe and inevitable impurity.
1. adopt continuous casting mode that molten steel is cast the thick steel billet of 230mm；
2. steel billet heats, through 1050 DEG C, rolling of coming out of the stove after 200min, and hot rolling start rolling temperature is 1020 DEG C, and finishing temperature is 850 DEG C, and coiling temperature is 720 DEG C, is hot-rolled down to 2.20mm；
3. hot rolled plate is incubated after 2.5min normalizing processes cold rolling through 950 DEG C, and by being stacked together after the coil of strip uncoiling of two volume same widths specifications and composition, entrance six roll five-machine frame Continuous mill train roll, and by a coil rolling to 1.0mm thickness, are involved in First coiling machine.Volume Two batches rolling with second coiling machine, when identical with first volume thickness.It is rolled into the steel band that thickness is 0.5mm by being stacked together after two coil uncoilings of same specification and composition；Mill speed controls at 600m/min, afterwards trimming bundling；
4. being annealed after bundling, annealing temperature controls 930 DEG C, annealing time 2min；
5. coating makes finished product.
Finished product iron loss P1.5/50:3.13W/kg, magnetic strength B5000:1.685T.
Embodiment 2
Material composition: C:0.003%, Si:3.25%, Al:0.58%, Mn:0.53%, P:0.008%, S:0.003%, N:0.0018%, all the other are Fe and inevitable impurity.
1. adopt continuous casting mode that molten steel is cast the thick steel billet of 230mm；
2. steel billet heats, through 1100 DEG C, rolling of coming out of the stove after 220min, and hot rolling start rolling temperature is 1050 DEG C, and finishing temperature is 860 DEG C, and coiling temperature is 740 DEG C.It is hot-rolled down to 2.20mm；
3. hot rolled plate is incubated after 2.8min normalizing processes cold rolling through 970 DEG C, and by being stacked together after the coil of strip uncoiling of two volume same widths specifications and composition, entrance six roll five-machine frame Continuous mill train roll, and by a coil rolling to 0.70mm thickness, are involved in First coiling machine.Volume Two batches rolling with second coiling machine, when identical with first volume thickness.It is rolled into the steel band that thickness is 0.35mm by being stacked together after two coil uncoilings of same specification and composition；Mill speed controls at 500m/min, afterwards trimming bundling；
4. being annealed after bundling, annealing temperature controls 950 DEG C, annealing time 2.5min；
5. coating makes finished product.
Finished product iron loss P1.5/50:2.53W/kg, magnetic strength B5000:1.677T.
Embodiment 3
Material composition: C:0.003%, Si:1.80%, Al:0.48%, Mn:0.43%, P:0.015%, S:0.006%, N:0.0015%, all the other are Fe and inevitable impurity.
1. adopt continuous casting mode that molten steel is cast the thick steel billet of 230mm；
2. steel billet heats, through 1120 DEG C, rolling of coming out of the stove after 180min, and hot rolling start rolling temperature is 990 DEG C, and finishing temperature is 850 DEG C, and coiling temperature is 700 DEG C.It is hot-rolled down to 2.50mm；
3. hot rolled plate is incubated after 2.0min normalizing processes cold rolling through 920 DEG C; by being stacked together after the coil of strip uncoiling of the three same width specifications of volume and composition, entrance six roll five-machine frame Continuous mill train carry out cold rolling; inlet of rolling mill adopts three coiling machines; when hot rolled plate is involved in three coiling machines respectively after being rolled to finished product 1.0mm thickness, three volumes are stacked together after coiling machine uncoiling simultaneously and are rolled into the steel band that thickness is 0.5mm；Mill speed controls at 750m/min, afterwards trimming bundling；
4. being annealed after bundling, annealing temperature controls 930 DEG C, annealing time 2min；
5. coating makes finished product.
Finished product iron loss P1.5/50:3.53W/kg, magnetic strength B5000:1.735T.
Claims (3)
1. the production method of a cold rolling high grade non-oriented electrical steel strip, it is characterized in that the percentage by weight of described electrical sheet chemical composition is: C≤0.005%, Si:1.70%～3.5%, Al:0.4%～1.0%, Mn:0.30%～0.80%, P≤0.020%, S≤0.015%, N≤0.0040%, all the other are Fe and inevitable impurity；Technique includes converter smelting, continuous casting, hot rolling, cold rolling, annealing, particularly as follows:
1) adopt continuous casting mode that molten steel is cast steel billet；
2) steel billet heats, through 1050～1150 DEG C, rolling of coming out of the stove after 150～250min, and hot rolling start rolling temperature is 980～1100 DEG C, and finishing temperature is 820～880 DEG C, and coiling temperature is 700～760 DEG C, is hot-rolled down to 1.5～3.0mm；
3) hot-rolled coil is incubated after 1.5～3.0min normalizing processes cold rolling through 900～980 DEG C; by being stacked together after the coil of strip uncoiling of more than two volumes same specification and composition, entrance six roller Continuous mill train carry out cold rolling; it is rolled into the steel band that thickness is 0.2～0.65mm; mill speed controls at 400～800m/min, afterwards trimming bundling；
4) being annealed after bundling, annealing temperature controls 900～1000 DEG C, annealing time 2-5min；
5) coating makes finished product.
2. the production method of a kind of cold rolling high grade non-oriented electrical steel strip according to claim 1, it is characterized in that: the entrance of six roller Continuous mill train adopts two coiling machines, the first volume is involved in first coiling machine after being rolled to finished product thickness 2 times, volume Two batches rolling with second coiling machine, when identical with first volume thickness, the entrance milling train that is stacked together after coiling machine uncoiling while of two volumes is rolled to finished product thickness.
3. the production method of a kind of cold rolling high grade non-oriented electrical steel strip according to claim 1, it is characterised in that: the entrance of six roller Continuous mill train adopts three coiling machines, and every rolling is involved in three coiling machines respectively to finished product thickness 2 times；The entrance milling train that is stacked together after coiling machine uncoiling while of three volumes is rolled to finished product thickness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410810277.0A CN105779880A (en) | 2014-12-23 | 2014-12-23 | Production method of cold-rolled high-grade non-oriented electrical steel thin strip |
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| CN201410810277.0A CN105779880A (en) | 2014-12-23 | 2014-12-23 | Production method of cold-rolled high-grade non-oriented electrical steel thin strip |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111684085A (en) * | 2018-02-02 | 2020-09-18 | 蒂森克虏伯钢铁欧洲股份公司 | Electrical strip capable of, but not forced, re-annealing |
| CN115198198A (en) * | 2022-09-13 | 2022-10-18 | 张家港扬子江冷轧板有限公司 | Non-oriented silicon steel for high-speed motor and preparation method thereof |
| CN116689486A (en) * | 2023-08-07 | 2023-09-05 | 江苏省沙钢钢铁研究院有限公司 | Non-oriented silicon steel sheet and preparation method thereof |
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| JPS57121804A (en) * | 1981-01-20 | 1982-07-29 | Sumitomo Metal Ind Ltd | Pack rolling method |
| JP2007056303A (en) * | 2005-08-24 | 2007-03-08 | Jfe Steel Kk | Method for producing non-oriented silicon steel sheet excellent in magnetic characteristic |
| CN101460644A (en) * | 2006-06-01 | 2009-06-17 | 本田技研工业株式会社 | High-strength steel sheet and its production method |
| CN102851577A (en) * | 2012-08-28 | 2013-01-02 | 武汉钢铁(集团)公司 | High grade non-oriented silicon steel produced by continuous casting and rolling of sheet billet and production method thereof |
| CN103882288A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | High-strength special cold-rolled non-oriented electrical steel and production method thereof |
| CN103882296A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | High-strength wear-resistant special cold-rolled non-oriented electrical steel and production method thereof |
| CN104120234A (en) * | 2014-07-02 | 2014-10-29 | 东北大学 | Preparation method of high-magnetic-induction non-oriented high-silicon steel thin plate |
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2014
- 2014-12-23 CN CN201410810277.0A patent/CN105779880A/en active Pending
Patent Citations (7)
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| JPS57121804A (en) * | 1981-01-20 | 1982-07-29 | Sumitomo Metal Ind Ltd | Pack rolling method |
| JP2007056303A (en) * | 2005-08-24 | 2007-03-08 | Jfe Steel Kk | Method for producing non-oriented silicon steel sheet excellent in magnetic characteristic |
| CN101460644A (en) * | 2006-06-01 | 2009-06-17 | 本田技研工业株式会社 | High-strength steel sheet and its production method |
| CN102851577A (en) * | 2012-08-28 | 2013-01-02 | 武汉钢铁(集团)公司 | High grade non-oriented silicon steel produced by continuous casting and rolling of sheet billet and production method thereof |
| CN103882288A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | High-strength special cold-rolled non-oriented electrical steel and production method thereof |
| CN103882296A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | High-strength wear-resistant special cold-rolled non-oriented electrical steel and production method thereof |
| CN104120234A (en) * | 2014-07-02 | 2014-10-29 | 东北大学 | Preparation method of high-magnetic-induction non-oriented high-silicon steel thin plate |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111684085A (en) * | 2018-02-02 | 2020-09-18 | 蒂森克虏伯钢铁欧洲股份公司 | Electrical strip capable of, but not forced, re-annealing |
| US11795530B2 (en) | 2018-02-02 | 2023-10-24 | Thyssenkrupp Steel Europe Ag | Electrical steel strip that can be but doesn't have to be reannealed |
| CN115198198A (en) * | 2022-09-13 | 2022-10-18 | 张家港扬子江冷轧板有限公司 | Non-oriented silicon steel for high-speed motor and preparation method thereof |
| CN115198198B (en) * | 2022-09-13 | 2022-12-23 | 张家港扬子江冷轧板有限公司 | Non-oriented silicon steel for high-speed motor and preparation method thereof |
| CN116689486A (en) * | 2023-08-07 | 2023-09-05 | 江苏省沙钢钢铁研究院有限公司 | Non-oriented silicon steel sheet and preparation method thereof |
| CN116689486B (en) * | 2023-08-07 | 2023-10-31 | 江苏省沙钢钢铁研究院有限公司 | Non-oriented silicon steel sheet and preparation method thereof |
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Application publication date: 20160720 |