CN101210297B - Method for manufacturing oriented silicon steel - Google Patents
Method for manufacturing oriented silicon steel Download PDFInfo
- Publication number
- CN101210297B CN101210297B CN2006101558379A CN200610155837A CN101210297B CN 101210297 B CN101210297 B CN 101210297B CN 2006101558379 A CN2006101558379 A CN 2006101558379A CN 200610155837 A CN200610155837 A CN 200610155837A CN 101210297 B CN101210297 B CN 101210297B
- Authority
- CN
- China
- Prior art keywords
- temperature
- rolling
- continuous casting
- continuous
- inhibitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000003112 inhibitor Substances 0.000 claims abstract description 32
- 238000009749 continuous casting Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 238000005266 casting Methods 0.000 claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000010304 firing Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000005097 cold rolling Methods 0.000 abstract description 13
- 238000005098 hot rolling Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 239000006104 solid solution Substances 0.000 description 7
- 239000010813 municipal solid waste Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000000137 annealing Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000005554 pickling Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000005204 segregation Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Landscapes
- Metal Rolling (AREA)
Abstract
The invention discloses a manufacturing method of oriented silicon steel, which adopts a production process of smelting, continuous casting, heating, rough rolling, finish rolling, normalizing, cold rolling and heat treatment, and is characterized in that a continuous bending continuous straightening low-head vertical bending type medium-thin plate continuous casting machine is used, the superheat degree of a tundish is 15-45 ℃, the drawing speed of 2-4 m/min is adopted, the temperature gradient of a casting blank is 80-200 ℃/mm, the surface temperature is 850-1150 ℃, the thickness of the slab is 100-170 mm, the surface temperature of the continuous casting blank entering a furnace is more than or equal to 800 ℃, and the heating speed is more than 5 ℃/min; after rough rolling, adopting a hot coil box, adopting single-frame rolling or multi-frame primary cold rolling mode or secondary cold rolling mode for cold rolling, wherein the temperature of a steel strip entering a finishing mill is 1100-1250 ℃, the temperature of a finishing rolling outlet is more than 800 ℃, adopting laminar cooling after rolling, and the final cooling temperature is 400-800 ℃; the invention controls the inhibitor state during continuous casting, and adopts the processes of high temperature, short time, rapid hot rolling heating process and the like, so that the product has uniform performance and high quality, and the purposes of energy conservation and high efficiency are realized.
Description
Technical field
The invention belongs to metallurgical technology field, relate to hot continuous rolling and produce the silicon steel method, specifically is a kind of orientation silicon steel board fabrication method.
Background technology
Orientation silicon steel production generally is to adopt straight circular-arc type continuous casting machine, strand is thick to be more than the 200mm, because this slab thickness is bigger, cool time is longer, casting blank surface temperature is lower, it is bigger that inhibitor in the steel is separated out size, and the production characteristics of this strand are to adopt higher temperature and long period heating to make its inhibitor solid solution, reach the purpose of producing orientation silicon steel.
Another kind is to adopt the CSP of thinner thickness to produce, but this production line adopts the continuous tunnel furnace heating, and heat time heating time and temperature can not guarantee, fully solid solution of inhibitor, the production characteristics of this strand are to adopt strand cooling and temperature are controlled, and reach the purpose of producing orientation silicon steel.
Because the development that continuous casting is produced, between above-mentioned medium thin slab between the two with its productivity ratio height, cost is low, continuous casting is effective etc., and advantage more and more receives publicity, the important process that this technology has now become continuous casting to produce, this medium thin slab becomes an important development direction.But because the particularity of silicon steel production technology, this medium thin slab is produced orientation silicon steel and is run into following problem:
1 does not have ripe production technology, because having the inhibitor of heavy slab field trash thicker and sheet billet simultaneously, medium thin slab production orientation silicon steel is difficult for problems such as come-up, though weaken to some extent, solve but still need to adopt rational technological measure to add, adopt the heavy slab production method not realize.
2 degree of supercoolings select the unreasonable strand component segregation that causes serious, and it is stable to influence properties of product.
3 because the relative heavy slab of slab is thinner, and reduction ratio is less, and is unfavorable to the field trash fragmentation, influences end properties.
Slab is not incubated measure behind the 4 present conventional sheet billet continuous castings, and the slab temperature drop is very fast, causes inhibitor to separate out in a large number and grow up.
Generally expose when temperature is treated in 5 roughing on roller-way, inhomogeneous cooling is even, and the coiled sheet temperature difference is bigger, and precipitate is inhomogeneous everywhere, causes performance to produce bigger fluctuation.
Summary of the invention
The objective of the invention is to disclose a kind of manufacture method of orientation silicon steel, bow at the continuous bend continuous straightening and upright to produce orientation silicon steel on the thin sheet continuous casting machine in curved, by control inhibitor state during continuous casting, and adopt high temperature, in short-term, hot-rolled heating technology fast.Realize energy-conservation, purpose efficiently.
The object of the present invention is achieved like this, and technological process is smelting-continuous casting-heating-roughing-finish rolling-normalizing-cold rolling-heat treatment, and its characteristics are,
The continuous casting conticaster is bowed for the continuous bend continuous straightening and is found curved middle thin sheet continuous casting machine, adopt 15～45 ℃ of the less middle bag degrees of superheat, adopt the pulling rate production of 2～4m/min in the casting process, after the front end base hull shape of crystallizer becomes, reduce cooling velocity, and guarantee that the liquid heart ends at the casting machine end.
Inhibitor separate out fast and the scope of 1000～1250 ℃ of the temperature of growing up in, improve cooling velocity 15-20%, make that the billet surface inhibitor is tiny separates out, and heart portion temperature keeps higher temperature, strand forms bigger 80～200 ℃/mm of thermograde, surface temperature reaches 850～1150 ℃, and the inner inhibitor of assurance strand is not separated out.
Adopting thickness is 100～170mm section casting blank, can guarantee the abundant come-up of field trash, can guarantee that again steel billet has higher temperature, has reduced the heating-up temperature of steel billet.Casting blank solidification speed is fast, the reduction gross segregation.
The roller-way that the has stay-warm case heating furnace of directly packing into is adopted in continuous casting billet cutting back, goes into stove billet surface temperature 〉=800 ℃, and described stay-warm case is omnidistance formula.
Adopt bigger firing rate, firing rate＞5 ℃/min raise casting blank surface temperature rapidly, and the quick solid solution of the inhibitor that the surface is separated out is in strand, and heart portion inhibitor still remains on solid solution condition after casting.
Adopt Coil Box after the roughing, make the steel band bulk temperature evenly and be in inhibitor and separate out more than the temperature, guarantee that inhibitor do not separate out.Distortion after steel band enters finishing mill when temperature is separated out temperature near inhibitor, phase transformation and temperature drop impel the inhibitor disperse to separate out.When head carried out the hot rolling unit, the steel band afterbody reached unanimity the steel band head and tail temperature still in Coil Box.
Hot rolled plate is made a practice of and is handled, and hot rolled plate is through laser welder welding, pickling.
Adopt rolling or multimachine frame once cold rolling mode of single chassis or secondary cold-rolling mode cold rolling.
It is 1100～1250 ℃ that steel band enters the finishing mill temperature, goes out tandem rolling unit temperature＞800 ℃, adopts the laminar flow cooling after rolling immediately, and final cooling temperature is 400～800 ℃.
Cold rolling back steel band through the decarburizing annealing of continuous annealing furnace wet hydrogen, be coated with separation layer, secondary recrystallization and purify operations such as annealing, hot-leveling and make finished product.
Advantage of the present invention and effect are:
1 adopts the less degree of superheat, makes the molten steel rapid solidification, and there is steel billet in inhibitor with the solid solution attitude in the steel, reduces hot rolling heating-up temperature subsequently and time, reduces segregation.
2 select the vertical bending type casting machine for use, in that vertically the section cooling rate is slower, guarantee that the field trash of steel fully floats, and enhance product performance.
3 control strand cooling rates make the billet surface temperature higher, and steel billet heart portion temperature reaches the purpose that reduces heat time heating time more than the inhibitor solid solubility temperature.
Adopt the stay-warm case insulation behind 4 continuous castings before the steel billet shove charge, reduce thermal loss, avoid inhibitor to separate out and grow up.
After the 5 hot rolling roughing, adopt Coil Box to treat temperature, make temperature of steel strips even, the steel band inhibitor is separated out with advancing a large amount of disperses fast, the iron loss fluctuation is reduced about 0.2W/kg, the magnetic strength fluctuation reduces about 0.01T.
6 have reduced slab heating temperature, have reduced the maintenance number of times of heating furnace, improve labour intensity, improve output; The intermediate blank temperature is even, and the inhibitor disperse is separated out, and suppresses effect and improves.
The specific embodiment
Technological process of the present invention is smelting-continuous casting-heating-roughing-finish rolling-normalizing-cold rolling-heat treatment; its characteristics are; the continuous casting conticaster is bowed for the continuous bend continuous straightening and is found curved middle thin sheet continuous casting machine; adopt 15～45 ℃ of the less middle bag degrees of superheat; adopt the pulling rate production of 2～4m/min clock in the casting process; after the front end base hull shape of crystallizer becomes, reduce cooling velocity, and guarantee that the liquid heart ends at the casting machine end.
Inhibitor separate out fast and the scope of 1000～1250 ℃ of the temperature of growing up in, improve cooling velocity 15%～20%, make that the billet surface inhibitor is tiny separates out, and heart portion temperature keeps higher temperature, strand forms bigger 80～200 ℃/mm of thermograde, surface temperature reaches 850～1150 ℃, and the inner inhibitor of assurance strand is not separated out.
Adopting thickness is 100～170mm section casting blank, can guarantee the abundant come-up of field trash, can guarantee that again steel billet has higher temperature, has reduced the heating-up temperature of steel billet.Casting blank solidification speed is fast, the reduction gross segregation.
The roller-way that the has stay-warm case heating furnace of directly packing into is adopted in continuous casting billet cutting back, goes into stove billet surface temperature 〉=800 ℃.
Adopt bigger firing rate, firing rate＞5 ℃/min raise casting blank surface temperature rapidly, and the quick solid solution of the inhibitor that the surface is separated out is in strand, and heart portion inhibitor still remains on solid solution condition after casting.
Adopt Coil Box after the roughing, make the steel band bulk temperature evenly and be in inhibitor and separate out more than the temperature, guarantee that inhibitor do not separate out.Distortion after steel band enters finishing mill when temperature is separated out temperature near inhibitor, phase transformation and temperature drop impel the inhibitor disperse to separate out.When head carried out the hot rolling unit, the steel band afterbody reached unanimity the steel band head and tail temperature still in Coil Box.
Hot rolled plate is made a practice of and is handled; hot rolled plate is through laser welder welding, pickling; adopt rolling or multimachine frame once cold rolling mode of single chassis or secondary cold-rolling mode cold rolling; it is 1100～1250 ℃ that steel band enters the finishing mill temperature; go out tandem rolling unit temperature＞800 ℃; adopt the laminar flow cooling after rolling immediately, final cooling temperature is 400～800 ℃.
Introduce several most preferred embodiments of the present invention below:
1 one-tenth component selections (Wt%)
| ? | C? | Si? | Mn? | S? | Als? | N? | Cu? | Fe+ impurity |
| Embodiment 1 | 0.05? | 3.25? | 0.07? | 0.03? | 0.02? | 0.007? | 0.01? | Surplus |
| Embodiment 2 | 0.06? | 3.20? | 0.08? | 0.03? | 0.03? | 0.008? | 0.01? | Surplus |
For embodiment 1,
Continuous casting adopts the continuous bend continuous straightening to bow and founds curved middle thin sheet continuous casting machine, and the middle bag degree of superheat is 18 ℃, adopts the pulling rate production of 2.5m/min in the casting process.Casting blank surface temperature remains on more than 1000 ℃ during continuous casting, form bigger thermograde (120～200 ℃/mm), continuous casting rear surface temperature reaches 1050～1150 ℃, slab thickness is 135mm, strand cuts off the back and adopts the stay-warm case insulation, and adopts roller-way to enter the heating furnace heating fast, adopts the stay-warm case insulation after the roughing, when temperature reached 1160 ℃, it was rolling to enter finishing mill fast.Go out 800～850 ℃ of tandem rolling unit temperature, adopt the laminar flow cooling after rolling immediately, final cooling temperature is 400～700 ℃.
Hot rolled plate is through laser welder welding, pickling, cold rolling.Carry out recrystallization annealing then and make high magnetic induction grain-oriented silicon steel.
For embodiment 2
Continuous casting adopts the continuous bend continuous straightening to bow and founds curved middle thin sheet continuous casting machine, and the middle bag degree of superheat is 15 ℃, adopts the pulling rate production of 2.3m/min in the casting process.Casting blank surface temperature remains on more than 1000 ℃ during continuous casting, form bigger thermograde (100～180 ℃/mm), continuous casting rear surface temperature reaches 1000～1100 ℃, slab thickness is 150mm, strand cuts off the back and adopts the stay-warm case insulation, and adopts roller-way to enter the heating furnace heating fast, adopts the stay-warm case insulation after the roughing, when temperature reached 1165 ℃, it was rolling to enter finishing mill fast.Go out 820～860 ℃ of tandem rolling unit temperature, adopt the laminar flow cooling after rolling immediately, improve cooling velocity 15%～20%, final cooling temperature is 450～700 ℃.
Hot rolled plate is through laser welder welding, pickling, cold rolling.Carry out recrystallization annealing then and make high magnetic induction grain-oriented silicon steel.
2 with conventional products contrast
| Project | The strand proportion of equiaxed grain | Iron loss P1.7 difference end to end | Magnetic strength B8 difference end to end | Field trash total amount ppm | Strand min heat time heating time |
| Embodiment 1 | 65? | 0.30? | 0.030? | 182? | 150? |
| Embodiment 2 | 72? | 0.25? | 0.025? | 194? | 150? |
| Comparative Examples 1 | 80? | 0.51? | 0.035? | 250? | 240? |
| Comparative Examples 2 | 85? | 0.43? | 0.032? | 243? | 240? |
Claims (2)
1. the manufacture method of an orientation silicon steel adopts following production technology, and smelting-continuous casting-heating-roughing-finish rolling-normalizing-cold rolling-heat treatment is characterized in that,
A adopts the continuous bend continuous straightening to bow and founds curved middle thin sheet continuous casting machine, and 15～45 ℃ of the middle bag degrees of superheat adopt the pulling rate production of 2～4m/min in the casting process;
B inhibitor separate out fast and the scope of 1000～1250 ℃ of the temperature of growing up in, improve cooling velocity 15%～20%, 80～200 ℃/mm of thermograde of strand, 850～1150 ℃ of surface temperatures;
The c slab thickness is 100～170mm section casting blank;
The roller-way that the has stay-warm case heating furnace of directly packing into is adopted in d continuous casting billet cutting back, goes into stove billet surface temperature 〉=800 ℃, firing rate＞5 ℃/min;
Adopt Coil Box after the e roughing, make the steel band bulk temperature evenly and temperature be higher than inhibitor and separate out temperature;
It is 1100～1250 ℃ that the f steel band enters the finishing mill temperature, and finishing temperature＞800 ℃ are adopted the laminar flow cooling immediately after rolling, and final cooling temperature is 400～800 ℃;
2. the manufacture method of a kind of orientation silicon steel according to claim 1 is characterized in that, described stay-warm case is omnidistance formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101558379A CN101210297B (en) | 2006-12-27 | 2006-12-27 | Method for manufacturing oriented silicon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101558379A CN101210297B (en) | 2006-12-27 | 2006-12-27 | Method for manufacturing oriented silicon steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101210297A CN101210297A (en) | 2008-07-02 |
| CN101210297B true CN101210297B (en) | 2010-12-08 |
Family
ID=39610549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101558379A Expired - Fee Related CN101210297B (en) | 2006-12-27 | 2006-12-27 | Method for manufacturing oriented silicon steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101210297B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660035B (en) * | 2008-08-25 | 2012-02-01 | 鞍钢股份有限公司 | Method for manufacturing electrical steel with excellent longitudinal magnetic property |
| CN101433911B (en) * | 2008-12-30 | 2011-02-23 | 北京科技大学 | Method for producing low cost oriented silicon steel using continuous casting and rolling technique of sheet bar |
| CN101927263B (en) * | 2009-06-24 | 2012-04-04 | 鞍钢股份有限公司 | Method for improving rolling stability of container thin material |
| CN102145349B (en) * | 2010-02-08 | 2012-12-19 | 鞍钢股份有限公司 | Method for stably controlling finish rolling temperature of oriented silicon steel |
| JP5668440B2 (en) * | 2010-12-03 | 2015-02-12 | Ｊｆｅスチール株式会社 | Hot rolling method for silicon-containing steel slabs |
| CN102560235B (en) * | 2010-12-17 | 2014-01-01 | 鞍钢股份有限公司 | Manufacturing method of high-magnetic-induction oriented silicon steel |
| JP5790276B2 (en) * | 2011-08-08 | 2015-10-07 | 東芝三菱電機産業システム株式会社 | Directional electrical steel sheet production line and induction heating device |
| CN103031426B (en) * | 2011-09-29 | 2015-07-08 | 鞍钢股份有限公司 | Method for improving performance of non-oriented electrical steel high-efficiency and high-grade product |
| CN103212584B (en) * | 2012-01-20 | 2015-03-04 | 五冶集团上海有限公司 | Method for controlling off-tracking of band steel of oriented silicon steel ultra-long multi-track horizontal loop |
| CN103882203A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | Hot rolling method for improving electromagnetic performance of silicon steel |
| CN104438359B (en) * | 2013-10-29 | 2017-05-10 | 上海宝信软件股份有限公司 | Method for increasing temperature of head of hot rolled strip steel |
| CN104726667B (en) * | 2013-12-23 | 2017-04-26 | 鞍钢股份有限公司 | Production method of medium and thin slab continuous casting and rolling low-temperature oriented silicon steel |
| CN104726670B (en) * | 2013-12-23 | 2017-07-21 | 鞍钢股份有限公司 | Method for preparing high-magnetic-induction oriented silicon steel from short-process medium and thin slabs |
| CN108480587B (en) * | 2018-02-13 | 2020-02-18 | 鞍钢股份有限公司 | Production method of low-inclusion-defect-rate high-magnetic-induction oriented silicon steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002212639A (en) * | 2001-01-12 | 2002-07-31 | Nippon Steel Corp | Method for producing grain oriented silicon steel sheet having excellent magnetic property |
| CN1743127A (en) * | 2005-09-29 | 2006-03-08 | 东北大学 | Method for producing oriented silicon steel band by continuous casting and rolling of thin plate slab |
-
2006
- 2006-12-27 CN CN2006101558379A patent/CN101210297B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002212639A (en) * | 2001-01-12 | 2002-07-31 | Nippon Steel Corp | Method for producing grain oriented silicon steel sheet having excellent magnetic property |
| CN1743127A (en) * | 2005-09-29 | 2006-03-08 | 东北大学 | Method for producing oriented silicon steel band by continuous casting and rolling of thin plate slab |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101210297A (en) | 2008-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101210297B (en) | Method for manufacturing oriented silicon steel | |
| US7942191B2 (en) | Method and system for producing wide steel strip | |
| CN102174683B (en) | Method for producing cold-rolling low-carbon aluminum killed steel with uniform through plate mechanical property | |
| CN101096034B (en) | Production method of ultra-low carbon steel for car outer plate | |
| CN102686751B (en) | Process to manufacture grain-oriented electrical steel strip and grain-oriented electrical steel produced thereby | |
| CN100567519C (en) | A kind of production technique of the deep-draw level cold-rolled steel sheet based on CSP technology | |
| CN107201478B (en) | A kind of Ultra-low carbon orientation silicon steel preparation method based on reducing twin-roll thin strip continuous casting technology | |
| CN108546814A (en) | A method of high magnetic induction grain-oriented silicon steel is produced based on ESP Endless Rolling Technologies | |
| CN104141093B (en) | Yield strength reaches motor vehicle body band steel and the rolling method thereof of 700MPa | |
| WO2019047587A1 (en) | Hot continuous rolled steel coil for high collapse strength sew oil casing and production method therefor | |
| CN102417959A (en) | Method for producing annealing-free hot rolling S50C plate and strip | |
| CN103305746A (en) | Manufacturing method of age-hardened thin-strip casting low-carbon microalloyed steel strip | |
| CN101914726B (en) | Low-carbon low-silicon high-efficiency non-oriented electrical steel sheet and production method thereof | |
| CN103468907A (en) | Method for producing cold-rolled non-oriented electrical steel based on ASP (AnGang Strip Production) medium thin slab continuous casting and rolling process | |
| CN103305748A (en) | Non-oriented electrical steel plate and manufacturing method thereof | |
| CN101219434A (en) | Method for producing steel for automobile wheel based on bar strip continuous casting and rolling flow path | |
| CN103572158A (en) | Non-oriented electrical steel plate and production method thereof | |
| CN104726670B (en) | Method for preparing high-magnetic-induction oriented silicon steel from short-process medium and thin slabs | |
| CN107164692B (en) | A method of the quick secondary recrystallization of orientation silicon steel based on thin band continuous casting technique | |
| CN103088253A (en) | Non-oriented electrical steel plate and production method thereof | |
| CN111531138B (en) | Method for producing non-oriented electrical steel by thin slab continuous casting and rolling | |
| CN105665662B (en) | Flux-cored wire based on ESP lines steel making method | |
| CN106048176B (en) | Method based on ESP bar strip continuous casting and rolling flow path production low-carbon hot-rolling TRIP steel | |
| CN103741018A (en) | Method for producing light hot rolling H-shaped steel for automobile beam | |
| CN107164693A (en) | A kind of preparation method based on the high silicon steel cold-strip steel of thin strap continuous casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20211227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |