CN104722726B - A kind of high-silicon electrical steel continuous casting producing method - Google Patents
A kind of high-silicon electrical steel continuous casting producing method Download PDFInfo
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- CN104722726B CN104722726B CN201310719631.4A CN201310719631A CN104722726B CN 104722726 B CN104722726 B CN 104722726B CN 201310719631 A CN201310719631 A CN 201310719631A CN 104722726 B CN104722726 B CN 104722726B
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- continuous casting
- steel
- molten steel
- electrical sheet
- casting
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Classifications
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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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
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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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Abstract
The present invention discloses a kind of high-silicon electrical steel continuous casting producing method, it is characterized in, smelting molten steel is to continuous casting after finished product composition, the relatively low electrical sheet strip of silicon content is added between double-roller continuous casting machine casting roll and molten steel, Continuous Casting Rolls drive electrical sheet strip with moving up into continuous casting zone under continuous casting billet, molten steel is flowed between two electrical sheet strips from tundish Jing long nozzles, two electrical sheet strips are sticked to, 20～50 DEG C of its degree of superheat, 10～50m/min of casting speed, molten steel solidification form the steel billet of 2～10mm thickness.Advantages of the present invention and effect are to increase electrical sheet strip between casting roll and molten steel, can reduce the adhesion of molten steel and casting roll; slab can also be protected in heating process, it is to avoid oxidation, eliminate continuous cast mold; production cost is reduced, lumber recovery is improved, surface defect is reduced；Due to silicone content all additions in smelting process, replace finished chemical to penetrate into, improve yield.
Description
Technical field
The invention belongs to technical field of electrical sheet production, and in particular to a kind of continuous casting producing method of high-silicon electrical steel.
Background technology
It is well known that siliceous is that 6.5% or so high-silicon electrical steel magnetostriction is approximately zero, anisotropy is low, therefore has
Preferable electromagnetic performance.
But the silicon steel in the range of the silicone content adopts conventionally produced difficulty.First, using conventionally produced, steel billet
It is very fast in heating process oxidation rate.Raise with silicone content, oxide ester mp is reduced, heating process production oxide is in a liquid state stream
To furnace bottom, long term accumulation, normal production is affected.Secondly, the steel is aoxidized in heating process silicon, produces desiliconization phenomenon.Three is tradition
Technique productions steel billet thickness is big, and each reduction in pass of hot rolling is limited, needs multi- pass rolling.Rolling temperature drop is big, and reduces with temperature,
Steel brittleness increases, easily broken band, and rolling is difficult.Four is that low melting point silicate is generated in hot rolling heating process due to silicone content height,
Slab is yielding, and hot rolling plate surface falls into many.
Double-roller rolling technology is a kind of technology of efficient production for Al alloys andMg alloys, rolled stainless steel；Some processing
The low silicon electric steel of better performances is also adopted by continuous casting, and as high silicon steel is oxidizable, poor thermal conductivity, fragility are high, and, with silicon
The increase of content, the fusing point of steel and heat conductivity are reduced, and chink is also easy to produce in casting process, so being not suitable for the high drawing of double roller continuous casting
Fast-growing is produced.
Existing employing double-roller rolling produces the technology of high silicon steel to be reached hot rolled, cold rolling after finished product thickness, in finished product
Annealing process penetrates into silicon using chemical method, makes silicone content reach 6.5%, and chemical siliconising is more difficult, diffusion of the silicon atom in steel
Speed is slower, and production cost is high.
The technique that there is presently no the siliceous high-silicon electrical steel for being 6.5% or so being directly produced.
The content of the invention
The present invention discloses a kind of excellent high-silicon electrical steel continuous casting producing method of electromagnetic performance, using strip double roller continuous casting side
Method, it is 3.5～6.5% to be suitable to produce silicone content scope, not only ensures silicone content in steel, and reduces continuous casting difficulty and improve plate
Surface quality when base is heated, improves silicon steel performance.
Concrete grammar is as follows：
The present invention includes following processing step：Smelting molten steel, double roller continuous casting, tandem rolling, batch, be characterized in：Smelting molten steel
The continuous casting to finished product composition, adds the relatively low electrical sheet strip of silicon content, continuous casting between double-roller continuous casting machine casting roll and molten steel
The dynamic electrical sheet strip of roller strap enters continuous casting zone with continuous casting billet, and molten steel is flowed between two electrical sheet strips from tundish Jing long nozzles,
Two electrical sheet strips are sticked to, 20～50 DEG C of the degree of superheat of its continuous casting, 10～50m/ of casting speed
Min, molten steel solidification form the steel billet of 2～10mm thickness.
10～50m/min of casting speed of the present invention, 20～50 DEG C of the degree of superheat, 2～10mm of slab thickness, slab thickness and electricity
Work steel strip thickness ratio is：1：10～30.
Electrical sheet strip silicone content of the present invention 2.0～3.3%.
Molten steel of the present invention completely cuts off air using protective atmosphere, cancels protection flux shielding, it is to avoid covering slag is involved in molten steel pollution
Molten steel.Using after double roller continuous casting in above operation, in order to improve board briquette uniformity, can increase sensing such as before tandem rolling can
Flame heating waits until firing equipment on-line heating.
Because two electrical sheet strips are sticked to moved above steel billet together, strip electrical sheet is risen in slab hot rolling heating process
To isolation furnace atmosphere, protection steel billet effect.Due to strip thickness it is relatively thin, so almost aoxidized in heating process, to base
Body composition has little to no effect.Due to molten steel of casting between two electrical sheet strips, it is to avoid bleed-out, cast temperature can be improved.
Higher cast temperature is more beneficial for follow-up rolling.
Feature of the present invention is double roller continuous casting operation therein, increases electrical sheet strip between casting roll and molten steel.The strip
The adhesion of molten steel and casting roll can be reduced, slab can also be protected in subsequent heating process, it is to avoid oxidation.
1st, continuous cast mold is eliminated, reduces production cost.Without crystallizer, therefore covering slag lubrication, section are not needed
About pollution of the covering slag to steel, steel are purer, while also reducing covering slag cost.
2nd, the Thin Strip Steel electrical sheet for sticking to casting billet surface protects steel billet in hot rolling heating process, improves lumber recovery, drop
Low surface defect.As high surface of silicon steel has the relatively low strip of a thin layer silicone content, so hot rolling heated oxide is alleviated,
Reduce production difficulty.
3rd, double roller continuous casting is adopted, production process temperature drop is low, the thinner steel band of thickness can be produced.
Due to silicone content all additions in smelting process, replace finished chemical to penetrate into, improve yield.
Description of the drawings
Accompanying drawing is present invention process schematic flow sheet.
Specific embodiment
The carrying out of the high silicon non-oriented electrical steel of following chemical components percentage by weight is manufactured experimently using the inventive method, its
In：C<0.010%, Si：3.50～6.50%, Mn：0.20～0.50%, P<0.030%, S<0.015%, Als：0.20～0.35%,
Remaining is ferrum and inevitable impurity element.
As illustrated, present invention process method is, continuous casting after smelting molten steel to finished product composition, in 2 both sides of double-roller continuous casting machine
Plus the electrical sheet thin coiled stock 3 that silicon content is relatively low, the electrical sheet strip that Continuous Casting Rolls drive silicon content relatively low is with continuous casting billet
Under move up into casting area, molten steel is flowed between two strips from tundish Jing long nozzles 4, and two electrical sheet strips are sticked on steel billet 1
Face is moved together, and molten steel solidification forms certain thickness steel billet.
10～50m/min of casting speed, 20～50 DEG C of the degree of superheat, 2～10mm of slab thickness, slab thickness are thin with electrical sheet
Tape thickness ratio is：1：10～30.
Described electrical sheet strip silicone content 2.0～3.3%.
Several most preferred embodiments of the present invention are described below：
Embodiment 1：
The chemical component weight percentage ratio of the high silicon non-oriented electrical steel of the embodiment of the present invention is：C：0.003%, Si：6.5%,
Mn：0.22%, P：0.014%, S：0.003%, Als：0.32%, remaining is ferrum and inevitable impurity element.
Production method includes following process steps：
A) smelt：Using converter smelting, RH vacuum refinings are processed, and molten steel composition is controlled by above-mentioned requirements, slab thickness
6mm, 30 DEG C of the continuous casting degree of superheat；
B) steel billet Jing hot continuous rollings are batched to 0.35mm.
c）900 DEG C of insulation 2min of coil of strip Jing.
Wherein casting process cancels crystallizer, with silicone content 3.0%, remaining composition electrician thick with steel billet identical 0.2mm
Steel replaces, and together moves and sticks to billet surface with steel billet during electrical sheet thin strap continuous casting.
1 embodiment of the present invention effect of table
Embodiment 2：
The chemical component weight percentage ratio of the high silicon non-oriented electrical steel of the embodiment of the present invention is：C：0.002%, Si：5.0%,
Mn：0.33%, P：0.021%, S：0.002%, Als：0.25%, remaining is ferrum and inevitable impurity element.
Production method includes following process steps：
A) smelt：Using converter smelting, RH vacuum refinings are processed, and molten steel composition is controlled by above-mentioned requirements, slab thickness
5mm, 40 DEG C of the continuous casting degree of superheat；
B) steel billet Jing hot continuous rollings are batched to 0.5mm.
c）900 DEG C of insulation 2min annealing of coil of strip Jing.
Wherein casting process cancels crystallizer, with silicone content 2.8%, remaining composition electrician thick with steel billet identical 0.3mm
Steel replaces, and together moves and sticks to billet surface with steel billet during electrical sheet thin strap continuous casting.
2 embodiment of the present invention effect of table
Embodiment 3：
The chemical component weight percentage ratio of the high silicon non-oriented electrical steel of the embodiment of the present invention is：C：0.002%, Si：4.55%,
Mn：0.42%, P：0.023%, S：0.004%, Als：0.23%, remaining is ferrum and inevitable impurity element.
Production method includes following process steps：
A) smelt：Using converter smelting, RH vacuum refinings are processed, and molten steel composition is controlled by above-mentioned requirements, slab thickness
4mm, 45 DEG C of the continuous casting degree of superheat；
B) steel billet Jing hot continuous rollings are batched to 0.5mm.
c）890 DEG C of insulation 2min annealing of coil of strip Jing.
Wherein casting process cancels crystallizer, with silicone content 2.5%, remaining composition electrician thick with steel billet identical 0.2mm
Steel replaces, and together moves and sticks to billet surface with steel billet during electrical sheet thin strap continuous casting.
1 embodiment of the present invention effect of table
Embodiment 4：
The chemical component weight percentage ratio of the high silicon non-oriented electrical steel of the embodiment of the present invention is：C：0.003%, Si：3.56%,
Mn：0.22%, P：0.024%, S：0.003%, Als：0.20%, remaining is ferrum and inevitable impurity element.
Production method includes following process steps：
A) smelt：Using converter smelting, RH vacuum refinings are processed, and molten steel composition is controlled by above-mentioned requirements, slab thickness
3mm, 45 DEG C of the continuous casting degree of superheat；
B) steel billet Jing hot continuous rollings are batched to 0.5mm.
c）890 DEG C of insulation 2min annealing of coil of strip Jing.
Wherein casting process cancels crystallizer, with silicone content 2.5%, remaining composition electrician thick with steel billet identical 0.2mm
Steel replaces, and together moves and sticks to billet surface with steel billet during electrical sheet thin strap continuous casting.
1 embodiment of the present invention effect of table
Claims (1)
1. a kind of high-silicon electrical steel continuous casting producing method, it is characterised in that continuous casting after smelting molten steel to finished product composition, double roller continuous casting
The relatively low electrical sheet strip of silicon content is added between machine casting roll and molten steel, Continuous Casting Rolls drive electrical sheet strip with continuous casting billet
Continuous casting zone is moved up into, molten steel is flowed between two electrical sheet strips from tundish Jing long nozzles, and two electrical sheet strips stick to steel billet
Move together above, 20～50 DEG C of its degree of superheat, 10～50m/min of casting speed, molten steel solidification forms the steel of 2～10mm thickness
Base；Slab thickness with electrical sheet strip thickness ratio is：1：10～30；Electrical sheet strip silicone content 2.0～3.3%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310719631.4A CN104722726B (en) | 2013-12-23 | 2013-12-23 | A kind of high-silicon electrical steel continuous casting producing method |
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| CN201310719631.4A CN104722726B (en) | 2013-12-23 | 2013-12-23 | A kind of high-silicon electrical steel continuous casting producing method |
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| CN104722726A CN104722726A (en) | 2015-06-24 |
| CN104722726B true CN104722726B (en) | 2017-03-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311996A (en) * | 2015-06-26 | 2017-01-11 | 鞍钢股份有限公司 | Method for reducing heating burning loss of oriented silicon steel |
| CN106475534A (en) * | 2015-08-24 | 2017-03-08 | 鞍钢股份有限公司 | A kind of method mitigating high-silicon electrical steel hot rolling scaling loss |
| CN105970082A (en) * | 2016-05-31 | 2016-09-28 | 内蒙古包钢钢联股份有限公司 | Production method of steel wire rod used for high-strength prestressed concrete steel bars |
| CN108441760B (en) * | 2018-02-13 | 2019-09-20 | 鞍钢股份有限公司 | A kind of high silicon steel and production method |
| KR102134311B1 (en) * | 2018-09-27 | 2020-07-15 | 주식회사 포스코 | Non-oriented electrical steel sheet and method for manufacturing the same |
| CN109338223B (en) * | 2018-11-09 | 2021-04-02 | 鞍钢股份有限公司 | Process method for improving surface quality and performance of silicon steel product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3440235C2 (en) * | 1984-11-03 | 1986-11-06 | Mannesmann AG, 4000 Düsseldorf | Method and device for continuous strip casting of metals, in particular steel |
| DE3440237C2 (en) * | 1984-11-03 | 1986-11-06 | Mannesmann AG, 4000 Düsseldorf | Device for continuous strip casting of metals, in particular steel |
| FR2656244A1 (en) * | 1989-12-26 | 1991-06-28 | Siderurgie Fse Inst Rech | DEVICE FOR CONTINUOUSLY CASTING THIN METAL PRODUCTS BETWEEN TWO ROTATED COOLED CYLINDERS. |
| CN1073382A (en) * | 1991-12-21 | 1993-06-23 | 罗铎明 | Sheet billet, made-up belt or continuous small-billet casting device |
| CN101164720B (en) * | 2006-10-19 | 2010-10-06 | 鞍钢股份有限公司 | Continuous casting method for increasing equal thickness continuous casting plate billet equal axial crystal rate in non-oriented silicon steel |
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