CN103014503A - Non-oriented silicon steel with high magnetic induction, low iron loss and acid corrosion resistance without normalization and its production method - Google Patents
Non-oriented silicon steel with high magnetic induction, low iron loss and acid corrosion resistance without normalization and its production method Download PDFInfo
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- CN103014503A CN103014503A CN2012104997227A CN201210499722A CN103014503A CN 103014503 A CN103014503 A CN 103014503A CN 2012104997227 A CN2012104997227 A CN 2012104997227A CN 201210499722 A CN201210499722 A CN 201210499722A CN 103014503 A CN103014503 A CN 103014503A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 29
- 230000006698 induction Effects 0.000 title claims abstract description 21
- 239000002253 acid Substances 0.000 title claims abstract description 19
- 238000005260 corrosion Methods 0.000 title claims abstract description 18
- 230000007797 corrosion Effects 0.000 title claims abstract description 17
- 238000010606 normalization Methods 0.000 title claims abstract 5
- 238000000137 annealing Methods 0.000 claims abstract description 15
- 229910052718 tin Inorganic materials 0.000 claims abstract description 8
- 238000005098 hot rolling Methods 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 238000005097 cold rolling Methods 0.000 claims abstract description 4
- 238000002791 soaking Methods 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 238000005266 casting Methods 0.000 claims abstract 3
- 238000003723 Smelting Methods 0.000 claims abstract 2
- 238000005554 pickling Methods 0.000 claims description 3
- 238000010583 slow cooling Methods 0.000 claims description 3
- 239000010960 cold rolled steel Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 15
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 238000005275 alloying Methods 0.000 abstract description 3
- 238000005530 etching Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 21
- 229910000859 α-Fe Inorganic materials 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005713 exacerbation Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 201000009240 nasopharyngitis Diseases 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
The high-magnetic induction low-iron loss acid-etching-resistant non-oriented silicon steel without normalization and the production method thereof are as follows: the components and the weight percentage content are as follows: c is less than or equal to 0.0050%, Si: 0.30 to 2.50%, Mn: 0.15-0.80%, Als: 0.25-0.80%, P is less than or equal to 0.050%, S is less than or equal to 0.0050%, N is less than or equal to 0.0050%, Ti is less than or equal to 0.0050%, Sn + Cu: 0.20-0.45% and Sn and Cu are not zero; the production steps are as follows: smelting and casting into a blank; heating a casting blank and soaking to 1080-1150 ℃; carrying out conventional hot rolling; coiling; acid washing; cold rolling to the thickness of a finished product at one time; and (6) annealing. The steel of the invention has low Si alloying degree, but the P1.5/50 can reach the level of middle and high grade non-oriented silicon steel, and the magnetic induction B5000 is higher than the common non-oriented silicon steel by more than 0.08T and is equivalent to the high magnetic induction non-oriented silicon steel with the same iron loss grade. The motor has the advantages of improving the stability of the motor which runs in a severe environment for a long time, prolonging the service life of the motor and reducing the corrosion loss in the production, storage and transportation and use processes.
Description
Technical field
The present invention relates to non orientating silicon steel and production method thereof, do not need that specifically hot-rolled sheet is carried out normalizing and process brand-new serial non orientating silicon steel product and the production method thereof to produce that the common cold rolling non-orientation silicon steel iron loss of more equal Si content is lower, magnetic strength is higher and to have good acid corrosion-resistant performance.This product is fit to make especially all kinds of high efficiency electric iron cores of all kinds of motors very much, is conducive to reduce the corrosion of silicon steel production and manufacturing cost, minimizing storing and use procedure and improves life-span and the stability that motor moves in severe environment.
Background technology
Before the present invention, a large amount of uses is common cold rolling non-orientation silicon steel on the market, is difficult to adapt to the development of electromechanical industries and iron core manufacturing technology.Later stage in last century, namely to begin to research and develop energetically iron loss P1.5/50 value suitable with common non orientating silicon steel about the country of silicon steel production unit and advanced technology and enterprise, magnetic strength B5000 then the above non-oriented silicon steel with high magnetic induction of the high 0.05～0.10T of more common non orientating silicon steel to satisfy the continuous miniaturization of electronic product, high precision int and high efficiency requirement.At present, Japan has many companies to develop a plurality of full technique or the half process high magnetic induction non orientating silicon steel product of 0.35mm and two kinds of thickness specifications of 0.50mm, and set up respectively company standard, the for example JNE of JFE company, JNA, RP, RM(Kawasaki Steel) and BF, BS(NKK) the non-oriented silicon steel with high magnetic induction product, the SX series of Sumitomo Metal Industries and the NC of Nippon Steel Corp series non-oriented silicon steel with high magnetic induction product etc.; China Wuhan Iron and Steel Plant company has developed 0.35mm and two kinds of specifications of 0.50mm amount to the commercial high magnetic sensing cold milling orientation less silicon steel of using of 26 trade mark X-complete serieses, and formulated " high magnetic sensing cold milling orientation less silicon strip (sheet) " GB/T25046-2010 national standard take it as technical foundation, this standard has begun issue on June 1st, 2011 and has implemented; China Baosteel company has developed 0.35mm and 6 full techniques of the trade mark of two kinds of thickness specifications of 0.50mm AH series and AR 2 trade mark half handicraft product non-oriented silicon steel with high magnetic inductions of series and has set up company standard.Although the said products has all been realized low-iron loss high-magnetic strength; but especially Si content is still higher for the overall alloying level of its each trade mark steel; also must increase Hot Rolled Plate Normalizing annealing operation guarantee magnetism index in the production technique; it is the same with the ordinary silicon product made from steel not corrosion-resistant simultaneously; in production, storing and motor manufacturing, the loss of use procedure easy-to-rust, also be difficult to guarantee life-span and the stability of operation motor in severe environment.
Summary of the invention
The objective of the invention is in the existing common technical measures such as Si content, a small amount of microalloy element of interpolation and combination working process parameter of passing through to reduce with the non-oriented silicon steel with high magnetic induction basis; provide a kind of need not to hot-rolled sheet carry out normalizing annealing process can produce that magnetic strength B5000 reaches more than the 1.70T, iron loss P1.5/50 is less than 4.70W/kg, and has non orientating silicon steel and the production method thereof of better acid corrosion-resistant performance.
Realize the measure of above-mentioned purpose:
The low iron of high magnetic strength that need not normalizing decreases the resistance to acid attack non orientating silicon steel; its component and weight percent content are: C≤0.0050%, Si:0.30～2.50%, Mn:0.15～0.80%, Als:0.25～0.80%, P≤0.050%, S≤0.0050%, N≤0.0050%, Ti≤0.0050%, Sn+Cu:0.20～0.45% and Sn and Cu are all non-vanishing, and surplus is Fe and inevitably is mingled with.
Preferably: C＜0.0030%, P＜0.020%, S＜0.0030%, N＜0.0030%, Ti＜0.0030%.
Production need not the method for the low iron damage of the high magnetic strength resistance to acid attack non orientating silicon steel of normalizing, its step:
1) smelts and casts base;
2) with strand heating and be soaked to 1080～1150 ℃;
3) carry out conventional hot rolling;
4) hot-rolled strip batches, and the control coiling temperature is at 720～780 ℃;
5) routinely pickling of hot-rolled sheet;
6) acid-cleaning plate carries out the disposable finished product thickness that is cold-rolled to routinely;
7) cold-reduced sheet is annealed, and the control annealing temperature is at 860～980 ℃, and annealing atmosphere is N
2+ H
2Mixed gas, annealing time are controlled at 3～8 minutes.
Preferably: the control slab heating temperature is at 1080～1120 ℃.
Preferably: the control coiling temperature is at 740～780 ℃.
It is characterized in that: behind the hot rolling reeling Direct Air-Cooled to room temperature, or stacking air cooling or in temperature is not less than 150 ℃ hole, carry out slow cooling to room temperature.
It is characterized in that: when C in the cold-rolled steel strip≤0.0028%, annealing atmosphere is dry state H
2+ N
2Mixed gas.
The principle of steel chemical composition design of the present invention is as follows:
C: the gap makes lattice distortion in α-Fe, significantly increases iron loss, reduces magnetic strength, and is harmful to magnetic, separates out and causes that timeliness worsens magnetic but the C in the finished product passes precipitation at normal temperatures in time.Raw material C too high levels is used for decarburization time and will prolongs and reduce unit speed and throughput, improves simultaneously the humidification water temperature and then increases the finished steel plate surface oxidation and degrade performance.The present invention stipulates C≤0.0050, optimum range＜0.0028%.
Si: be dissolved in ferrite, improve matrix resistivity, reduce eddy-current loss, significantly reduce iron loss, but also make the magnetic property variation simultaneously, reduce magnetic strength, when Si content reaches certain level, continue to increase Si content, the effect that reduces iron loss weakens, worsens the effect increase of magnetic strength.Regulation Si scope of the present invention is 0.30 ~ 2.50%, the too soft normal operation that is not suitable for of product less than 0.30% time, and B5000 is difficult to reach high magnetic strength requirement greater than 2.50% the time.
Mn: being dissolved in ferrite has the effect that reduces iron loss, forms stable MnS with inevitable inclusion S, reduces S to the harm of magnetic, also can prevent hot-short.Regulation Mn scope of the present invention is 0.15 ~ 0.50%, solid S scarce capacity when being lower than 0.15%, and when being higher than 0.50%, Ac
1Temperature reduces, and α → γ phase transformation easily occurs finished products, destroys recrystallized structure.
Als: act on similarly to Si, be dissolved in ferrite, improve matrix resistivity, coarsened grain, simultaneously can also deoxidation, fixed nitrogen, obviously reduce iron loss but also reducing magnetic strength simultaneously.Regulation Al scope of the present invention is 0.25 ~ 0.80%.Advantageous effect is not obvious when being lower than 0.25%, very easily causes oxidation and degradation performance in the steel plate when being higher than 0.80%.
P: be dissolved on a small quantity ferrite, can significantly improve matrix resistivity decreased iron loss, it is again the positive segregation element simultaneously, favourable promotion recrystallize and recrystal grain are grown up, indium addition improves very favourable to common silicon steel or common high magnetic strength magnetic, but in characteristic component steel of the present invention, the interpolation of P does not have obvious effect to magnetic and resistance to acid attack improved performance.The present invention stipulates P≤0.050%, optimum range＜0.020%.
S: all harmful to processibility and magnetic, form small and dispersed MnS particle with Mn and hinder the finished products grain growth, severe exacerbation magnetic forms low melting point FeS and FeS with Fe
2Or eutectic, easily cause brittleness from hot-working.The present invention stipulates S≤0.005%, optimum range＜0.0030%.
N: easy and Al, Ti etc. form the nitride particle of small and dispersed, meeting obstruction recrystallize and recrystal grain are grown up in the finished products process, the meeting precipitation is separated out and is caused magnetic aging under the N room temperature of solid solution among α-Fe, severe exacerbation electronic product performance, the present invention stipulates N≤0.005%, optimum range＜0.0030%.
Ti: dissolve in ferrite, but the effect that improves matrix resistivity decreased iron loss is not obvious, because it is strong C, N compound forming element, the separating out of its small and dispersed particle can serious hinder recrystallize and recrystal grain is grown up, extremely harmful to magnetic, the present invention stipulates Ti≤0.005%, optimum range＜0.0030%.
Sn, Cu: all be dissolved in ferrite, all can significantly improve matrix resistivity, reduce iron loss, simultaneously Sn is again the positive segregation element, favourable promotion recrystallize and improve recrystallization texture, its on the surface or the grain boundaries segregation can reduce in the top layer oxidation and active oxygen and permeate to base steel along crystal boundary; Cu is again the very effective element that improves low alloy steel weather-resistant performance, also can make the S in the residual steel further innoxious.Regulation Sn of the present invention, Cu must be compound interpolations, the compound interpolation scope of Sn+Cu be 0.20 ~ 0.45% and Sn and Cu all non-vanishing, can not realize low-iron loss high-magnetic strength and high acid corrosion-resistant performance when being lower than 0.20%, also not have more multiple-effect fruit when being higher than 0.45%, and increase production cost.
The present invention compared with prior art, its characteristics:
1) steel of the present invention is low with other common and non-oriented silicon steel with high magnetic induction Si alloying level of iron loss level, but its P1.5/50 can reach middle high grade non-oriented silicon steel level, more than the high 0.08T of the more common non orientating silicon steel of magnetic strength B5000, with suitable with other non-oriented silicon steel with high magnetic induction of iron loss level.
2) the present invention has common and the not available good acid corrosion-resistant performance of non-oriented silicon steel with high magnetic induction.
3) the present invention does not need that online hot-rolled sheet is carried out normalizing annealing and processes and can make finished product obtain good comprehensive magnetic yet, and the more common middle high trade mark has been simplified main production process with non-oriented silicon steel with high magnetic induction, can obviously reduce production costs, improve the production line production capacity.
4) the especially all kinds of high efficiency electrics of all kinds of motors that can make of steel of the present invention, very favourable work-ing life to improving the stability of in severe environment, moving for a long time motor and prolonging motor, also can reduce the corrosion loss of silicon steel production, storing and use procedure.
Embodiment
The below is described in detail the present invention:
Table 1 is various embodiments of the present invention and the tabulation of Comparative Examples Chemical Composition in Cast Billet;
Table 2 is main production and the parameter list of various embodiments of the present invention and Comparative Examples;
Table 3 is gone out magnetic, the tabulation of acid corrosion rate of finished product by the different states Hot Rolling Plate Production for various embodiments of the present invention and Comparative Examples.
Various embodiments of the present invention and Comparative Examples are according to following key step and process parameters range production:
1) smelts and casts base;
2) with strand heating and be soaked to 1100～1180 ℃;
3) carry out conventional hot rolling;
4) hot-rolled strip batches, and the control coiling temperature is at 711～770 ℃; Behind the hot rolling reeling respectively Direct Air-Cooled or stacking air cooling or in greater than 150 ℃ hole slow cooling to room temperature.
5) routinely pickling of hot-rolled sheet;
6) acid-cleaning plate carries out the disposable finished product 0.50mm thickness that is cold-rolled to routinely;
7) cold-reduced sheet is annealed, and the control annealing temperature is at 870～960 ℃, and annealing atmosphere is respectively to be done or wet N
2+ H
2Mixed gas, the annealing soaking time is controlled at 4～6 minutes.
Table 1 embodiment of the invention and Comparative Examples Chemical Composition in Cast Billet (% by weight meter)
Table 2 embodiment of the invention and Comparative Examples main production and parameter
Finished product magnetic, acid corrosion rate that table 3 embodiment of the invention and comparative example different states Hot Rolling Plate Production go out
The performance test explanation: finished product magnetic is for liking the Epstein test result; The acid etching rate is 24 hours post-etching rates (%) of 5% sulphuric acid soln soaking at room temperature.
Above-described embodiment only exemplifies for the best, and is not to be restriction to embodiments of the present invention.
Claims (7)
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| CN201210499722.7A CN103014503B (en) | 2012-11-30 | 2012-11-30 | High magnetic induction low iron loss acid corrosion resistant non-oriented silicon steel without normalization and production method |
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| CN201210499722.7A CN103014503B (en) | 2012-11-30 | 2012-11-30 | High magnetic induction low iron loss acid corrosion resistant non-oriented silicon steel without normalization and production method |
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| CN103014503B CN103014503B (en) | 2014-09-17 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436796A (en) * | 2013-09-10 | 2013-12-11 | 武汉钢铁(集团)公司 | Non-oriented electrical steel for inverter compressor and production method thereof |
| CN104195426A (en) * | 2014-03-26 | 2014-12-10 | 浙江龙盛薄板有限公司 | Semi-processed non-oriented silicon steel and manufacturing method thereof |
| CN105239005A (en) * | 2015-11-27 | 2016-01-13 | 武汉钢铁(集团)公司 | High-permeability non-oriented silicon steel and production method |
| CN106119496A (en) * | 2016-08-08 | 2016-11-16 | 浙江华赢特钢科技有限公司 | A kind of production technology of modified model non-oriented silicon steel with high magnetic induction sheet |
| CN107385335A (en) * | 2017-08-08 | 2017-11-24 | 马钢(集团)控股有限公司 | A kind of new-energy automobile motor non-orientation silicon steel thin belt and manufacture method |
| CN107964631A (en) * | 2017-12-15 | 2018-04-27 | 武汉钢铁有限公司 | The high speed rotor of motor non-orientation silicon steel and production method of yield strength >=500MPa |
| WO2019105041A1 (en) | 2017-11-30 | 2019-06-06 | 宝山钢铁股份有限公司 | Non-oriented electrical steel sheet with excellent magnetism and manufacturing method therefor |
| CN112143974A (en) * | 2020-09-27 | 2020-12-29 | 江苏省沙钢钢铁研究院有限公司 | Production method of non-oriented silicon steel and non-oriented silicon steel |
| WO2021037064A1 (en) | 2019-08-26 | 2021-03-04 | 宝山钢铁股份有限公司 | Cu-containing non-oriented electrical steel sheet and manufacturing method therefor |
| CN112609128A (en) * | 2020-11-30 | 2021-04-06 | 武汉钢铁有限公司 | Non-oriented silicon steel plate with excellent corrosion resistance for high-efficiency motor and production method thereof |
| WO2023131223A1 (en) | 2022-01-07 | 2023-07-13 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with good magnetic performance and manufacturing method therefor |
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| WO2011148849A1 (en) * | 2010-05-25 | 2011-12-01 | 新日本製鐵株式会社 | Process for production of unidirectional electromagnetic steel sheet |
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| WO2011148849A1 (en) * | 2010-05-25 | 2011-12-01 | 新日本製鐵株式会社 | Process for production of unidirectional electromagnetic steel sheet |
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| CN103436796B (en) * | 2013-09-10 | 2015-10-14 | 武汉钢铁(集团)公司 | A kind of frequency-changeable compressor non-oriented electrical steel and production method thereof |
| CN103436796A (en) * | 2013-09-10 | 2013-12-11 | 武汉钢铁(集团)公司 | Non-oriented electrical steel for inverter compressor and production method thereof |
| CN104195426A (en) * | 2014-03-26 | 2014-12-10 | 浙江龙盛薄板有限公司 | Semi-processed non-oriented silicon steel and manufacturing method thereof |
| CN104195426B (en) * | 2014-03-26 | 2017-02-15 | 浙江龙盛薄板有限公司 | Semi-processed non-oriented silicon steel and manufacturing method thereof |
| CN105239005A (en) * | 2015-11-27 | 2016-01-13 | 武汉钢铁(集团)公司 | High-permeability non-oriented silicon steel and production method |
| CN105239005B (en) * | 2015-11-27 | 2017-03-22 | 武汉钢铁(集团)公司 | High-permeability non-oriented silicon steel and production method |
| CN106119496A (en) * | 2016-08-08 | 2016-11-16 | 浙江华赢特钢科技有限公司 | A kind of production technology of modified model non-oriented silicon steel with high magnetic induction sheet |
| CN107385335A (en) * | 2017-08-08 | 2017-11-24 | 马钢(集团)控股有限公司 | A kind of new-energy automobile motor non-orientation silicon steel thin belt and manufacture method |
| WO2019105041A1 (en) | 2017-11-30 | 2019-06-06 | 宝山钢铁股份有限公司 | Non-oriented electrical steel sheet with excellent magnetism and manufacturing method therefor |
| CN107964631A (en) * | 2017-12-15 | 2018-04-27 | 武汉钢铁有限公司 | The high speed rotor of motor non-orientation silicon steel and production method of yield strength >=500MPa |
| US12104215B2 (en) | 2018-11-26 | 2024-10-01 | Baoshan Iron & Steel Co., Ltd. | High-magnetic-induction low-iron-loss non-oriented silicon steel sheet and manufacturing method therefor |
| WO2021037064A1 (en) | 2019-08-26 | 2021-03-04 | 宝山钢铁股份有限公司 | Cu-containing non-oriented electrical steel sheet and manufacturing method therefor |
| CN112143974A (en) * | 2020-09-27 | 2020-12-29 | 江苏省沙钢钢铁研究院有限公司 | Production method of non-oriented silicon steel and non-oriented silicon steel |
| CN112143974B (en) * | 2020-09-27 | 2021-10-22 | 江苏省沙钢钢铁研究院有限公司 | Production method of non-oriented silicon steel and non-oriented silicon steel |
| CN112609128A (en) * | 2020-11-30 | 2021-04-06 | 武汉钢铁有限公司 | Non-oriented silicon steel plate with excellent corrosion resistance for high-efficiency motor and production method thereof |
| WO2023131223A1 (en) | 2022-01-07 | 2023-07-13 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with good magnetic performance and manufacturing method therefor |
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