CN106475534A - A kind of method mitigating high-silicon electrical steel hot rolling scaling loss - Google Patents
A kind of method mitigating high-silicon electrical steel hot rolling scaling loss Download PDFInfo
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- CN106475534A CN106475534A CN201510520403.3A CN201510520403A CN106475534A CN 106475534 A CN106475534 A CN 106475534A CN 201510520403 A CN201510520403 A CN 201510520403A CN 106475534 A CN106475534 A CN 106475534A
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Abstract
The present invention provides a kind of method mitigating high-silicon electrical steel hot rolling scaling loss, high-silicon electrical steel strand for Si content 1.5～3.5wt%, four electrical sheet strips are respectively set between casting roll and molten steel and between two leptoprosopy, molten steel flows between electrical sheet strip from tundish through long nozzle, and solidification forms strand；Casting roll internal water flowing cooling；It is provided with the water collar with water-cooled, casting speed 0.5～3m/min, 5～30 DEG C of the degree of superheat outside four electrical sheet strips, molten steel adopts protective atmosphere to completely cut off air.Conticaster of the present invention eliminates crystallizer, it is possible to decrease equipment and supplies expense, saving and protection slag, reduces the pollution to steel for the covering slag, the degree of purity of raising steel, and can prevent the adhesion of molten steel and casting roll, improves cc billet surface quality.Stick to the electrical sheet strip of casting billet surface, both steel billet matrix composition will not be impacted, can greatly mitigate oxidation during subsequent heat for the strand again, reduce hot rolling scaling loss and surface defect, improve rolling lumber recovery.
Description
Technical field
The invention belongs to continuous casting process apparatus field, more particularly, to a kind of mitigation Si content is in the high-silicon electrical steel of 1.5～3.5wt%
The method of strand hot rolling scaling loss.
Background technology
Due to poor thermal conductivity, fragility height, is also easy to produce chink in casting process to high silicon (Si 1.5-3.5%) electrical sheet and continuous casting is tired
Difficult.High-silicon electrical steel produces, using the conticaster with crystallizer, the strand that thickness is 30-300mm, then heats in heating furnace again
After roll.
Because the silicone content of this continuous casting billet is high, the strand of traditional handicraft oxidation rate in heating process is very fast, with silicone content liter
Height, oxide ester mp reduces, and generates low melting point silicate, and slab is yielding, and hot rolled plate surface defect is many.And, heated
What journey produced oxide is in a liquid state and flows to heating furnace bottom, and long term accumulation can affect being normally carried out of production.In addition, high silicon electrician
Steel silicon oxidation in heating process, produces desiliconization phenomenon, and conventionally produced steel billet thickness is big, each reduction in pass of hot rolling
Limited, need multi- pass rolling.And roll temperature drop greatly, and the reduction with temperature, the fragility of steel increases, and broken belt will
Phenomenon, and cause rolling difficult.
Content of the invention
The present invention provides a kind of method mitigating high-silicon electrical steel hot rolling scaling loss, its object is to reduce hot rolling scaling loss, reduces surface
Defect, improves purity of steel, improves later stage rolling lumber recovery.
For this reason, the solution that the present invention is taken is：
A kind of method mitigating high-silicon electrical steel hot rolling scaling loss is it is characterised in that the high silicon for Si content 1.5～3.5wt% is electric
Work steel strand, conticaster adopts four electrical sheet strips to replace crystallizers, that is, remove conticaster crystallizer, casting roll and molten steel it
Between and two leptoprosopy between two electrical sheet strips are respectively set, molten steel flows between four electrical sheet strips from tundish through long nozzle,
Solidification forms strand；It is provided with the water collar with water-cooled outside four electrical sheet strips；Casting roll internal water flowing cooling；Continuous casting speed
Degree 0.5～3m/min, 5～30 DEG C of the degree of superheat, molten steel adopts protective atmosphere to completely cut off air.
Described slab thickness is 90～300mm.
Described electrical sheet strip Si content is 0.5～2.0wt%, thickness 0.1～3mm.
Beneficial effects of the present invention are：
1st, conticaster eliminates crystallizer, and one is to reduce equipment and supplies expense；Two is without covering slag lubrication, saving and protection
Slag, reduces the pollution to steel for the covering slag, can improve the degree of purity of steel.
2nd, electrical sheet strip is set between casting roll and molten steel, both can improve pouring temperature, and be conducive to subsequently rolling；Can prevent again
Molten steel and the adhesion of casting roll, improve cc billet surface quality.
3rd, stick to the electrical sheet strip of casting billet surface, almost can aoxidize in postorder hot rolling heating process, both will not be to steel
Base matrix composition impacts, and can greatly mitigate oxidation in heating process for the strand, reduces scaling loss and surface defect,
Improve rolling lumber recovery.
Brief description
Fig. 1 is that conticaster constitutes schematic diagram.
In figure：Strand 1, conticaster 2, electrical sheet strip 3, tundish 4, water collar 5.
Specific embodiment
The method that the present invention mitigates high-silicon electrical steel hot rolling scaling loss is to remove the crystallizer of original conticaster 2, and in conticaster
It is respectively provided with a roll of Si content 0.5～2.0wt%, the electrical sheet strip 3 of thickness 0.1～3mm between 2 both sides and two leptoprosopy,
Article two, electrical sheet strip 3 is arranged between casting roll and molten steel, realize continuous casting Si content 1.5～3.5wt%, thickness be 90～
The high-silicon electrical steel strand 1 of 300mm.Molten steel flows between four electrical sheet strips 3 from tundish 4 through long nozzle, in four electricity
It is provided with the water collar 5 with water-cooled, solidification forms strand 1 outside work steel strip 3.Casting roll internal water flowing cooling.Casting speed
0.5～3m/min, 5～30 DEG C of the degree of superheat, molten steel adopts protective atmosphere to completely cut off air, cancels protection flux shielding.
With reference to embodiment, the invention will be further described.
Embodiment 1：
Electrician steel chemical composition wt% is：C0.002%, Si2.20%, Mn0.32%, P0.021%, S0.005%, Als0.20%,
Yu Weitie and inevitable impurity.
Using converter smelting, RH refining treatment.Continuous casting adopts Si1.0wt%, the electrical sheet strip 3 of thickness 1.0mm, sticks to
Move together with strand 1 during electrical sheet strip 3 continuous casting on strand 1 surface, molten steel adopts protective atmosphere to completely cut off air, continuous casting speed
Degree 0.9m/min, 10 DEG C of the degree of superheat, slab thickness 230mm.
Strand 1 heats 1150 DEG C of tandem rollings and batches to 2.3mm thin plate.
Anneal through 900 DEG C after being cold-rolled to 0.5mm.
Embodiment 2：
Electrician steel chemical composition wt% is：C0.002%, Si3.20%, Mn0.22%, P0.025%, S0.004%, Als0.28%,
Yu Weitie and inevitable impurity.
Using converter smelting, RH refining treatment.Continuous casting adopts Si2.0wt%, the electrical sheet strip 3 of thickness 0.5mm, sticks to
Move together with strand 1 during electrical sheet strip 3 continuous casting on strand 1 surface, molten steel adopts protective atmosphere to completely cut off air, continuous casting speed
Degree 2.0m/min, 20 DEG C of the degree of superheat, slab thickness 135mm.
Strand 1 heats 920 DEG C, insulation 2min, is cold-rolled to 0.5mm after normalizing treatment.
Coil of strip is annealed through 910 DEG C.
Embodiment 3：
Electrician steel chemical composition wt% is：C0.003%, Si1.65%, Mn0.22%, P0.025%, S0.003%, Als0.21%,
Yu Weitie and inevitable impurity.
Using converter smelting, RH refining treatment.Continuous casting adopts Si0.8wt%, the electrical sheet strip 3 of thickness 2mm, sticks to casting
Move together with strand 1 during electrical sheet strip 3 continuous casting on base 1 surface, molten steel adopts protective atmosphere to completely cut off air, casting speed
2.5m/min, 25 DEG C of the degree of superheat, slab thickness 100mm.
Strand 1 heats 1140 DEG C of tandem rollings and batches to 2.0mm thin plate.
It is cold-rolled to 0.5mm to batch, coil of strip is annealed through 900 DEG C.
The effect of embodiment 1～3 is as shown in the table.
| Embodiment | Iron loss W/kg | Magnetic strength value T |
| Embodiment 1 | 3.38 | 1.67 |
| Embodiment 2 | 2.65 | 1.69 |
| Embodiment 3 | 3.89 | 1.68 |
.
Claims (3)
1. a kind of method mitigating high-silicon electrical steel hot rolling scaling loss it is characterised in that for Si content 1.5～
The high-silicon electrical steel strand of 3.5wt%, conticaster adopts four electrical sheet strips to replace crystallizer, that is, the company of dismounting
Casting machine crystallizer, respectively arranges two electrical sheet strips between casting roll and molten steel and between two leptoprosopy, molten steel from
Tundish flows between four electrical sheet strips through long nozzle, is provided with water outside four electrical sheet strips
Cold water collar, solidification forms strand；Casting roll internal water flowing cooling；Casting speed 0.5～3m/min, overheated
5～30 DEG C of degree, molten steel adopts protective atmosphere to completely cut off air.
2. according to claim 1 mitigate high-silicon electrical steel hot rolling scaling loss method it is characterised in that
Described slab thickness is 90～300mm.
3. according to claim 1 mitigate high-silicon electrical steel hot rolling scaling loss method it is characterised in that
Described electrical sheet strip Si content is 0.5～2.0wt%, thickness 0.1～3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510520403.3A CN106475534A (en) | 2015-08-24 | 2015-08-24 | A kind of method mitigating high-silicon electrical steel hot rolling scaling loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510520403.3A CN106475534A (en) | 2015-08-24 | 2015-08-24 | A kind of method mitigating high-silicon electrical steel hot rolling scaling loss |
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| Publication Number | Publication Date |
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| CN106475534A true CN106475534A (en) | 2017-03-08 |
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| CN201510520403.3A Pending CN106475534A (en) | 2015-08-24 | 2015-08-24 | A kind of method mitigating high-silicon electrical steel hot rolling scaling loss |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5823550A (en) * | 1981-07-31 | 1983-02-12 | Nippon Steel Corp | Controlling method for broadside thickness of thin strip produced by quenching of molten metal |
| CN1073382A (en) * | 1991-12-21 | 1993-06-23 | 罗铎明 | Sheet billet, made-up belt or continuous small-billet casting device |
| JPH0751811A (en) * | 1993-08-16 | 1995-02-28 | Nippon Steel Corp | Cooling roll for thin metal strip |
| CN201669391U (en) * | 2010-05-18 | 2010-12-15 | 南昌市南方连铸工程有限责任公司 | High silicon electrical sheet double-roll type thin strip caster |
| CN104722726A (en) * | 2013-12-23 | 2015-06-24 | 鞍钢股份有限公司 | High-silicon electrical steel continuous casting production method |
-
2015
- 2015-08-24 CN CN201510520403.3A patent/CN106475534A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5823550A (en) * | 1981-07-31 | 1983-02-12 | Nippon Steel Corp | Controlling method for broadside thickness of thin strip produced by quenching of molten metal |
| CN1073382A (en) * | 1991-12-21 | 1993-06-23 | 罗铎明 | Sheet billet, made-up belt or continuous small-billet casting device |
| JPH0751811A (en) * | 1993-08-16 | 1995-02-28 | Nippon Steel Corp | Cooling roll for thin metal strip |
| CN201669391U (en) * | 2010-05-18 | 2010-12-15 | 南昌市南方连铸工程有限责任公司 | High silicon electrical sheet double-roll type thin strip caster |
| CN104722726A (en) * | 2013-12-23 | 2015-06-24 | 鞍钢股份有限公司 | High-silicon electrical steel continuous casting production method |
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Application publication date: 20170308 |