CN108179352A - A kind of preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting - Google Patents
A kind of preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting Download PDFInfo
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- CN108179352A CN108179352A CN201810081946.3A CN201810081946A CN108179352A CN 108179352 A CN108179352 A CN 108179352A CN 201810081946 A CN201810081946 A CN 201810081946A CN 108179352 A CN108179352 A CN 108179352A
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- Prior art keywords
- continuous casting
- goss texture
- strap continuous
- preparation
- cast strip
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Classifications
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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
-
- 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
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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%
-
- 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
-
- 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 invention belongs to silicon steel manufacturing field, the preparation method of more particularly to a kind of strong goss texture Fe Si alloy thin band bases of thin strap continuous casting.It follows the steps below：(1) by set component smelting molten steel, ingredient is by weight percentage：C<0.005%, Si 2.8~3.2%, Mn 0.15~0.30%, Al 0.30~0.50%, S 0.005~0.01%, N 0.003~0.008%, P<0.008%, surplus Fe.(2) thin strap continuous casting obtains 2~3mm Cast Strips.It is 1530~1560 DEG C to control pouring temperature, and contact arc angle of the molten steel with casting roll is 35~50 °, and teeming speed is 17~22m/min.The long axis direction of the silicon steel Cast Strip crystal grain of gained is with Cast Strip normal direction in >=20 ° of inclinations angle, and average grain size is about 170~270 μm, the volume fraction ＞ 4.0% of goss texture.The present invention can significantly increase the goss texture in thin strap continuous casting silicon steel Cast Strip, simple for process, stable, can be prepared for orientation silicon steel and provide excellent made-up belt material.
Description
Technical field
The invention belongs to orientation silicon steel manufacturing field, more particularly to a kind of strong goss texture Fe-Si alloys of thin strap continuous casting are thin
The preparation method of made-up belt.
Background technology
Orientation silicon steel is the siliceous ferro-silicium 3% or so, has extremely strong { 110 } in production board<001>Gauss
(Goss) texture, nearly all crystal grain<001>Direction is parallel to roll to so as to very superior magnetization property.It takes
It is the important core material of transformer to silicon steel, under the operating condition to fixed-field, high magnetic strength and extremely low iron loss
Energy loss can be substantially reduced, save material and electric energy.It is usually necessary to use stringent alloying components to set for the preparation of orientation silicon steel
Meter and complicated and accurately processing technology, any link, which goes wrong, may all cause the magnetic property of final products not up to standard.
In old process, strand is kept the temperature before hot rolling it is generally necessary to be heated to 1350 DEG C or more, so as to which the precipitates such as coarse MnS return
It is molten, so as to ensure that a large amount of tiny MnS are precipitated in hot rolling, it is abnormal to grow up for subsequent cold-reduced sheet primary recrystallization tissue and carries
For strong pining force, the consumption of requirement and the energy of this process to heating equipment is all very high.And thin strap continuous casting can
Molten steel is realized in 5s to the process of setting of 1~5mm strands, this Sub realizable fuzzy matrix process can be obtained than conventional strand smaller
Tissue, while can be directly by the solid solution of a large amount of inhibitor formation elements in the base, so as to the control for inhibitor and follow-up
Secondary recrystallization process provides convenience.
The preparation of orientation silicon steel relies on the abnormal growth process of Goss crystal grain in first annealing plate.In old process,
These Goss primary recrystallization crystal grain are mostly derived from the Goss crystal grain that time surface layer is formed in hot rolled plate, this Goss crystal grain and strand
Strong shear-deformable related in surface layer and time surface layer during hot rolling.And in thin strap continuous casting flow, due to strand itself it is relatively thin (2~
5mm), the reduction ratio that hot rolling can relate to is smaller.This process conditions may result in the Goss seeds in primary recrystallization plate
Deficiency, and then influence its secondary recrystallization process.Patent CN103255338B announces a kind of enhancing twin-roll thin strip continuous casting oriented silicon
The method of steel hot rolling Goss texture, Major Technology are using the conventional hot rolling technology of asynchronous hot rolling substitution, so as to enhance
It is shear-deformable, more Goss crystal grain are obtained in Cast Strip.This method is stringent to hot-rolled temperature, press control, and increases energy
Consumption.Research shows that thin strap continuous casting can obtain the casting with various grain sizes and texture by the adjustment to pouring into a mould parameter
Band.Therefore, it is to solve the most effective approach of problem above that strong Goss texture how is directly obtained in solidified structure.This patent
Application is completed under project of national nature science fund project (51674080) subsidy.
Invention content
In view of the above problems, the present invention provides a kind of preparation side of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting
Method, it is therefore an objective to by the control of thin strap continuous casting parameter, obtain the silicon steel thin belt base with strong goss texture, be high-quality silicon steel
It prepares and material is provided.
The technical scheme is that：
A kind of preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting, carries out according to the following steps：
(1) smelting molten steel, ingredient are according to mass percent：C<0.005%, Si 2.8~3.2%, Mn 0.15~
0.30%, Al0.30~0.50%, S 0.005~0.01%, N 0.003~0.008%, P<0.008%, surplus Fe；
(2) control pouring temperature is 1530~1560 DEG C, and the molten steel smelted is poured into two reverse rotations through tundish
Casting roll and side seal board composition molten bath in, the silicon steel Cast Strip of 2~3mm thickness is obtained by thin strap continuous casting, is subsequently cooled to room temperature.
A diameter of 500~the 700mm of casting roll in the strip casting process, side seal board are boron nitride material.
Contact arc angle of the molten steel with casting roll is 35~50 ° in the strip casting process, and teeming speed is 17~22m/
min。
The long axis direction of the silicon steel Cast Strip crystal grain is with Cast Strip normal direction in >=20 ° of inclinations angle, average grain size 170
~270 μm.
In the Fe-Si alloy thin band bases, volume fraction >=4.0% of goss texture.
Compared with prior art, the features of the present invention and advantageous effect are：
(1) it is to contact arc angle with casting roll by increasing molten steel the characteristics of technical scheme of the present invention, reduces teeming speed, from
And so that solidified structure is directly submitted to big plastic deformation in strip casting process, and then obtain strong goss texture.
(2) the technical scheme is that directly obtaining strong goss texture in solidified structure, " casting " is had with " rolling "
Effect is combined together, and can save subsequent course of hot rolling, simplifies technique.
(3) content of goss texture is that hot rolling or asynchronous hot rolling technology obtain in acquisition Fe-Si alloys Cast Strip of the invention
2~3 times of goss texture.
Description of the drawings
Fig. 1 is the metallographic structure of Fe-Si alloys Cast Strip prepared in the embodiment of the present invention 1.
Fig. 2 is the marcotexture of Fe-Si alloys Cast Strip prepared in the embodiment of the present invention 1.
Fig. 3 is the marcotexture of Fe-Si alloys Cast Strip prepared in comparative example 1 of the present invention.
Specific embodiment
In the following, the present invention is further elaborated on by embodiment.
Embodiment 1
In the present embodiment, the preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting, according to the following steps into
Row：
(1) smelting molten steel, ingredient are according to mass percent：C 0.005%, Si 3.0%, Mn 0.20%, Al
0.45%, S 0.005%, N 0.004%, P 0.003%, surplus Fe.
(2) control pouring temperature is 1540 DEG C, and the molten steel smelted is poured into the casting roll of two reverse rotations through tundish
In the molten bath of side seal board composition, the silicon steel Cast Strip of 2.4mm thickness is obtained, is subsequently cooled to room temperature.The a diameter of 550mm of casting roll, side
Sealing plate is boron nitride material.Contact arc angle of the molten steel with casting roll is 45 °, teeming speed 20m/min.
The metallographic structure of Fe-Si alloys Cast Strip obtained is as shown in Figure 1, the long axis direction and Cast Strip normal direction of crystal grain are in 30
~50 ° of inclinations angle, average grain size are about 210 μm.The marcotexture of the Cast Strip is as shown in Fig. 2, the point of maximum intensity of its texture is
Goss texture, intensity 8.8, volume fraction 4.8%.
Embodiment 2
In the present embodiment, the preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting, according to the following steps into
Row：
(1) smelting molten steel, ingredient are according to mass percent：C 0.004%, Si 2.8%, Mn 0.15%, Al
0.30%, S 0.01%, N 0.008%, P 0.007%, surplus Fe.
(2) control pouring temperature is 1550 DEG C, and the molten steel smelted is poured into the casting roll of two reverse rotations through tundish
In the molten bath of side seal board composition, the silicon steel Cast Strip of 2.8mm thickness is obtained, is subsequently cooled to room temperature.The a diameter of 550mm of casting roll, side
Sealing plate is boron nitride material.Contact arc angle of the molten steel with casting roll is 38 °, teeming speed 17m/min.
The long axis direction of the silicon steel Cast Strip crystal grain obtained is with Cast Strip normal direction in 20~50 ° of inclinations angle, average grain size
About 240 μm.The point of maximum intensity of the marcotexture of the Cast Strip be goss texture, intensity 7.2, volume fraction 4.1%.
Embodiment 3
In the present embodiment, the preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting, according to the following steps into
Row：
(1) smelting molten steel, ingredient are according to mass percent：C 0.005%, Si 3.2%, Mn 0.27%, Al
0.50%, S 0.008%, N 0.008%, P 0.003%, surplus Fe.
(2) control pouring temperature is 1530 DEG C, and the molten steel smelted is poured into the casting roll of two reverse rotations through tundish
In the molten bath of side seal board composition, the silicon steel Cast Strip of 2.1mm thickness is obtained, is subsequently cooled to room temperature.The a diameter of 550mm of casting roll, side
Sealing plate is boron nitride material.Contact arc angle of the molten steel with casting roll is 48 °, teeming speed 22m/min.
The long axis direction of the Fe-Si alloys Cast Strip crystal grain obtained is with Cast Strip normal direction in 30~60 ° of inclinations angle, average crystal grain
Size is about 175 μm.The point of maximum intensity of the marcotexture of the Cast Strip be goss texture, intensity 8.3, volume fraction 4.3%.
Embodiment 4
In the present embodiment, the preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting, according to the following steps into
Row：
(1) smelting molten steel, ingredient are according to mass percent：C 0.005%, Si 3.0%, Mn 0.20%, Al
0.35%, S 0.005%, N 0.005%, P 0.005%, surplus Fe.
(2) control pouring temperature is 1560 DEG C, and the molten steel smelted is poured into the casting roll of two reverse rotations through tundish
In the molten bath of side seal board composition, the silicon steel Cast Strip of 2.7mm thickness is obtained, is subsequently cooled to room temperature.The a diameter of 700mm of casting roll, side
Sealing plate is boron nitride material.Contact arc angle of the molten steel with casting roll is 40 °, teeming speed 19m/min.
The long axis direction of the silicon steel Cast Strip crystal grain obtained is with Cast Strip normal direction in 20~50 ° of inclinations angle, average grain size
About 260 μm.The point of maximum intensity of the marcotexture of the Cast Strip be goss texture, intensity 7.5, volume fraction 4.2%.
Comparative example 1
In this comparative example, the preparation method of Fe-Si alloy thin band bases carries out according to the following steps：
(1) smelting molten steel, ingredient are according to mass percent：C 0.005%, Si 3.0%, Mn 0.30%, Al
0.40%, S 0.01%, N 0.005%, P 0.004%, surplus Fe.
(2) control pouring temperature is 1580 DEG C, and the molten steel smelted is poured into the casting roll of two reverse rotations through tundish
In the molten bath of side seal board composition, the silicon steel Cast Strip of 2.6mm thickness is obtained, is subsequently cooled to room temperature.The a diameter of 550mm of casting roll, side
Sealing plate is boron nitride material.Contact arc angle of the molten steel with casting roll is 26 °, teeming speed 30m/min.
The long axis direction of the silicon steel Cast Strip crystal grain obtained is with Cast Strip normal direction in 20~50 ° of inclinations angle, average grain size
About 340 μm.The marcotexture of the Cast Strip is as shown in figure 3, the intensity of goss texture is 2.7, volume fraction 1.4%.
Embodiment and comparative example the result shows that, the Gauss that can significantly increase in thin strap continuous casting silicon steel Cast Strip of the present invention knits
Structure, it is simple for process, stable, it can be prepared for orientation silicon steel and excellent made-up belt material be provided.
Claims (5)
1. a kind of preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting, which is characterized in that according to the following steps into
Row：
(1) smelting molten steel, ingredient are according to mass percent：C<0.005%, Si 2.8~3.2%, Mn 0.15~
0.30%, Al 0.30~0.50%, S 0.005~0.01%, N 0.003~0.008%, P<0.008%, surplus Fe；
(2) control pouring temperature is 1530~1560 DEG C, and the molten steel smelted is poured into the casting of two reverse rotations through tundish
Roller is in the molten bath of side seal board composition, obtaining the silicon steel Cast Strip of 2~3mm thickness by thin strap continuous casting, being subsequently cooled to room temperature.
2. the preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting according to claim 1, feature exist
In a diameter of 500~700mm of casting roll in the strip casting process, side seal board is boron nitride material.
3. the preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting according to claim 1, feature exist
In contact arc angle of the molten steel with casting roll is 35~50 ° in the strip casting process, and teeming speed is 17~22m/min.
4. the preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting according to claim 1, feature exist
In for the long axis direction of the silicon steel Cast Strip crystal grain with Cast Strip normal direction in >=20 ° of inclinations angle, average grain size is 170~270
μm。
5. the preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting according to claim 1, feature exist
In, in the Fe-Si alloy thin band bases, volume fraction >=4.0% of goss texture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810081946.3A CN108179352A (en) | 2018-01-29 | 2018-01-29 | A kind of preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting |
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| CN201810081946.3A CN108179352A (en) | 2018-01-29 | 2018-01-29 | A kind of preparation method of the strong goss texture Fe-Si alloy thin band bases of thin strap continuous casting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111097884A (en) * | 2019-12-31 | 2020-05-05 | 华北理工大学 | Preparation method of silicon steel thin strip |
| CN114799099A (en) * | 2022-03-31 | 2022-07-29 | 江苏沙钢集团有限公司 | Method for improving molten steel wettability on surface of thin strip continuous casting roller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069167A (en) * | 2010-11-11 | 2011-05-25 | 东北大学 | Method for preparing oriented silicon steel isometric crystal thin strip blank by twin-roll thin strip continuous casting |
| CN103602886A (en) * | 2013-12-06 | 2014-02-26 | 东北大学 | Method for preparation of 1.5mm grade Fe-Si alloy strip by twin-roll thin strip continuous casting |
| CN104226954A (en) * | 2014-08-25 | 2014-12-24 | 东北大学 | Method for controlling precipitates and impurities in twin-roll thin-strip casting process of non-oriented silicon steel |
| CN104962811A (en) * | 2015-07-15 | 2015-10-07 | 东北大学 | Double-roll thin-belt continuous casting fine crystal grain orientated silicon steel thin strip stock and manufacturing method of thin strip stock |
-
2018
- 2018-01-29 CN CN201810081946.3A patent/CN108179352A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069167A (en) * | 2010-11-11 | 2011-05-25 | 东北大学 | Method for preparing oriented silicon steel isometric crystal thin strip blank by twin-roll thin strip continuous casting |
| CN103602886A (en) * | 2013-12-06 | 2014-02-26 | 东北大学 | Method for preparation of 1.5mm grade Fe-Si alloy strip by twin-roll thin strip continuous casting |
| CN104226954A (en) * | 2014-08-25 | 2014-12-24 | 东北大学 | Method for controlling precipitates and impurities in twin-roll thin-strip casting process of non-oriented silicon steel |
| CN104962811A (en) * | 2015-07-15 | 2015-10-07 | 东北大学 | Double-roll thin-belt continuous casting fine crystal grain orientated silicon steel thin strip stock and manufacturing method of thin strip stock |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111097884A (en) * | 2019-12-31 | 2020-05-05 | 华北理工大学 | Preparation method of silicon steel thin strip |
| CN111097884B (en) * | 2019-12-31 | 2021-09-14 | 华北理工大学 | Preparation method of silicon steel thin strip |
| CN114799099A (en) * | 2022-03-31 | 2022-07-29 | 江苏沙钢集团有限公司 | Method for improving molten steel wettability on surface of thin strip continuous casting roller |
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Application publication date: 20180619 |