CN108396233A - High intensity non-orientation silicon steel and its manufacturing method and application - Google Patents
High intensity non-orientation silicon steel and its manufacturing method and application Download PDFInfo
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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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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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
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
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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
- C22C38/04—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
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Abstract
This application discloses a kind of high intensity non-orientation silicon steel, chemical composition includes according to mass percent meter：C≤0.0030%；Si：1.30% 2.00%；Mn：0.30% 0.70%；P：0.02% 0.10%；S≤0.0040%；N≤0.0030%；Al：0.10% 0.40%, Sb：0.01% 0.07%, Nb+V+Ti≤0.0060%, surplus is Fe and other inevitable impurity elements.Disclosed herein as well is the application of high intensity non-orientation silicon steel and manufacturing methods.A kind of new silicon steel provided by the invention meets yield strength >=270MPa, the requirement of tensile strength >=410MPa under the premise of ensureing magnetic property qualification.
Description
Technical field
This application involves steel processing technique fields, more particularly to a kind of high intensity non-orientation silicon steel and its manufacturer
Method and application.
Background technology
High-speed industrial motor needs rotor to run at high speed, and usual rotating speed is 6000~15000r/min, main feature
It is spinner velocity height, the magnetic flux frequency in stator winding current and iron core is high, and power density and loss density are big.High-speed electric expreess locomotive master
It applies on the centrifugal compressor of air-conditioning or refrigerator, wherein small, light-weight high-speed electric expreess locomotive is in automobile, aviation, ship
The fields such as oceangoing ship are also widely used.
High-speed industrial motor will produce huge centrifugal force when running at high speed, it is desirable that used electrical sheet has foot
Enough high intensity resists centrifugal force, harsh rotor gap when due to design of electrical motor, so to Non-oriented silicon steel for motors
Mechanical property requirements are very high, therefore other than meeting basic magnetic property requirements, also have higher requirement to mechanical property, i.e.,
Yield strength >=270MPa, tensile strength >=410MPa.
Problem of the existing technology includes at least：It is of high cost, it is difficult to while meeting high magnetic property and mechanical performance.
Invention content
The purpose of the present invention is to provide a kind of high intensity non-orientation silicon steel and its manufacturing method and applications, existing to overcome
There is the deficiency in technology.
To achieve the above object, the present invention provides the following technical solutions：
The embodiment of the present application discloses a kind of high intensity non-orientation silicon steel, and chemical composition includes according to mass percent meter：C≤
0.0030%；Si：1.30%-2.00%；Mn：0.30%-0.70%；P：0.02%-0.10%；S≤0.0040%；N≤
0.0030%；Al：0.10%-0.40%, Sb：0.01%-0.07%, Nb+V+Ti≤0.0060%, surplus be Fe and it is other not
Evitable impurity element.
Preferably, in above-mentioned high intensity non-orientation silicon steel, chemical composition includes according to mass percent meter：C：
0.0025%, Si：1.66%, Mn：0.47%, Sb：0.039%, Al：0.282%, P：0.040%, S：0.0039%, N：
0.0017%, surplus Fe.
Preferably, in above-mentioned high intensity non-orientation silicon steel, chemical composition includes according to mass percent meter：C：
0.0020%, Si：1.63%, Mn：0.49%, Sb：0.041%, Al：0.294%, P：0.039%, S：0.0029%, N：
0.0008%, surplus Fe.
Disclosed herein as well is a kind of high intensity non-orientation silicon steels, are applied to the electrical sheet of industrial motor.
Correspondingly, disclosed herein as well is a kind of manufacturing methods of high intensity non-orientation silicon steel, include smelting, casting successively
Make, hot rolling, cold rolling and annealing, wherein
Hot rolling, 2h or more is kept the temperature first at 1120-1150 DEG C by the forging stock of casting, and subsequent hot rolled machine is no less than 7
Secondary rolling, finishing temperature are 800~900 DEG C, and coiling temperature is 600~800 DEG C.
Preferably, in the manufacturing method of above-mentioned high intensity non-orientation silicon steel, the casting uses direct casting mode.
Preferably, in the manufacturing method of above-mentioned high intensity non-orientation silicon steel,
In casting process, the molten steel obtained will be smelted, 220mm thickness continuous casting billets is obtained using direct casting,
In hot-rolled process, hot rolled machine is no less than 7 passes and obtains 2.0-3.5mm thickness hot-strips；
The cold rolling is by Hot Rolling Strip to finished product thickness 0.50mm.
Preferably, in the manufacturing method of above-mentioned high intensity non-orientation silicon steel, the total reduction of institute's hot rolling is 98.4%-
99.1%, every time reduction ratio is 12%-30%.
Preferably, in the manufacturing method of above-mentioned high intensity non-orientation silicon steel, annealing atmosphere is that nitrogen and hydrogen mix
Gas, wherein hydrogen accounting are 4%-30%, and dew-point temperature control is at 0~30 DEG C, and annealing temperature is 850~950 DEG C, annealing zone
Speed is 90-120m/min.
Disclosed herein as well is a kind of manufacturing methods of high intensity non-orientation silicon steel, including：
(1) it smelts：Obtain molten steel；
(2) it casts：The molten steel that step (1) is obtained is obtained into 220mm thickness continuous casting billets using direct casting；
(3) hot rolling：The strand for obtaining step (2) at 1120-1150 DEG C keeps the temperature 2h or more, and subsequent hot rolled machine is many
In 7 passes, 2.0-3.5mm thickness hot-strips, total reduction 98.4%-99.1% are obtained, every time reduction ratio is
12%-30%, finishing temperature are 800~900 DEG C, and coiling temperature is 600~800 DEG C；
(4) cold rolling：Using 5 frame tandem mill groups, by Hot Rolling Strip to finished product thickness 0.50mm；
(5) it anneals：It anneals in continuous annealing furnace, atmosphere is nitrogen and hydrogen gas mixture, wherein hydrogen accounting
For 4%-30%, at 0~30 DEG C, annealing temperature is 850~950 DEG C for dew-point temperature control, and annealing belt speed is 90-120m/min.
Compared with the prior art, the advantages of the present invention are as follows：A kind of new silicon steel provided by the invention ensures that magnetic property closes
Under the premise of lattice, meet yield strength >=270MPa, the requirement of tensile strength >=410MPa.
Specific implementation mode
Inventor is found surprisingly that by many experiments, using this case formula and its manufacturing process, the nothing of acquisition
Orientation silicon steel magnetic strength B50 is not only in 1.70T or more, but also yield strength and tensile strength are also apparently higher than high-speed industrial motor pair
The requirement of silicon steel.
The chemical composition of the non-orientation silicon steel is：C：≤ 0.0030%；Si：1.30%-2.00%；Mn：0.30%-
0.70%；P：0.02%-0.10%；S≤0.0040%；N≤0.0030%；Al：0.10%-0.40%, Sb：0.01%-
0.07%, Nb+V+Ti≤0.0060%, surplus are Fe and other inevitable impurity elements.
The manufacturing method of the high strength cold-rolled non-orientation silicon steel, includes the following steps：
(1) it smelts：According to chemical composition percentage, molten steel is obtained by converter, RH vacuum drying ovens etc.；
(2) it casts：The molten steel that step (1) is obtained is obtained into 220mm thickness continuous casting billets using direct casting.
(3) hot rolling：The strand for obtaining step (2) at 1120-1150 DEG C keeps the temperature 2h or more, and subsequent hot rolled machine is many
In 7 passes, 2.0-3.5mm thickness hot-strips, total reduction 98.4%-99.1% are obtained, every time reduction ratio is
12%-30%, finishing temperature are 800~900 DEG C, and coiling temperature is 600~800 DEG C.
(4) cold rolling：Using 5 frame tandem mill groups, by Hot Rolling Strip to finished product thickness 0.50mm.
(5) it anneals：It anneals in continuous annealing furnace, atmosphere is nitrogen and hydrogen gas mixture, wherein hydrogen accounting
For 4%-30%, at 0~30 DEG C, annealing temperature is 850~950 DEG C for dew-point temperature control, and annealing belt speed is 90-120m/min.
For guarantee silicon-steel magnetic energy, a small amount of Sb is added on the basis of adding Al and Si elements, it is inclined using the crystal boundary of Sb
The poly- final annealing texture for improving steel, alloying element Mn can improve the intensity of silicon steel, and the solution strengthening effect of P is also to improve by force
One important method of degree, but P will produce brittleness, so to be controlled to the content of P.By Design of Chemical Composition, close
The control of the techniques such as the content of the elements such as reason control Al, Si, Mn, P and hot rolling, cold rolling, annealing.
Non-orientation silicon steel magnetic induction B50 >=1.69T produced by the present invention, iron loss P1.5/50≤4.2W/kg, surrender are strong
Degree >=270MPa, tensile strength >=410MPa.
Mainly consider the following when chemical composition content design of the present invention：
Si：It is the essential element of silicon steel, improves the essential element of resistivity, crystal grain is promoted to grow up, reduces iron loss.But Si
Too high levels can reduce magnetic strength, therefore the Si contents of the present invention are 1.30%-2.00%.
Al：It is also the essential element that silicon steel reduces iron loss, effect is similar with Si elements, but Al content is excessively high to be caused to refine
Steel is difficult, and Al content of the invention is 0.10%-0.40%.
Mn：Mn and S can form MnS, prevent from generating FeS and leading to hot-short phenomenon, while similar to Si, Al effect, improve
Resistivity reduces iron loss.The Mn contents of the present invention are 0.30%-0.70%.
P：Resistivity can be improved, crystal grain is promoted to grow up, reduces iron loss.P can equally improve hardness and improve punching,
But when P content is excessively high, product embrittlement, cold-workability is deteriorated.Therefore the P of present invention addition 0.02%-0.10%.
Sb：{ 111 } grain nucleation can be hindered in grain boundaries segregation, surface forms little crystal grain, drop when punching can be hindered to anneal
Low iron loss improves magnetic.Therefore the Sb of present invention addition 0.01%-0.07%.
C、N、S、Nb、V、Ti：It is the unfavorable element of silicon-steel magnetic, the present invention claims：C：≤ 0.0030%；S≤
0.0040%；N≤0.0030%；Nb+V+Ti≤0.0060% reduces the deterioration to magnetic property to the greatest extent.
The present invention is described further by the following example：According to following embodiments, the present invention may be better understood.
However, as it will be easily appreciated by one skilled in the art that specific material ratio, process conditions and its result described in embodiment are only used
In illustrating the present invention, without the present invention described in detail in claims should will not be limited.
Embodiment 1
C：0.0025%, Si：1.66%, Mn：0.47%, Sb：0.039%, Al：0.282%, P：0.040%, S：
0.0039%, N：0.0017%, surplus Fe, above-mentioned percentage are mass percent.
1140 DEG C of furnace temp, finishing temperature are 880 DEG C, and coiling temperature is 690 DEG C, and hot-rolled coil thickness is
2.70mm.Hot-rolled coil is subjected to the strip that 81.8% reduction ratio cold rolling is 0.5mm.Strip after cold rolling carries out final annealing,
Annealing temperature is 880 DEG C, that is, obtains the high intensity non-orientation silicon steel.
The magnetic strength B50 of non-orientation silicon steel finished product is that 1.70T or more, iron loss P1.5/50 are less than 3.90W/kg, and yield strength is
284MPa, tensile strength 440MPa, elongation percentage 33%.
Embodiment 2
C：0.0020%, Si：1.63%, Mn：0.49%, Sb：0.041%, Al：0.294%, P：0.039%, S：
0.0029%, N：0.0008%, surplus Fe, above-mentioned percentage are mass percent.
1140 DEG C of furnace temp, finishing temperature are 872 DEG C, and coiling temperature is 689 DEG C, and hot-rolled coil thickness is
2.70mm.Hot-rolled coil is subjected to the strip that 81.8% reduction ratio cold rolling is 0.5mm.Strip after cold rolling carries out final annealing,
Annealing temperature is 880 DEG C, that is, obtains the high intensity non-orientation silicon steel.
The magnetic strength B50 of non-orientation silicon steel finished product is that 1.71T or more, iron loss P1.5/50 are less than 3.95W/kg, and yield strength is
292MPa, tensile strength 449MPa, elongation percentage 30%.
Comparative example 1
C：0.0023%, Si：1.50%, Mn：0.50%, Sb：0.041%, Al：0.305%, P：0.012%, S：
0.0030%, N：0.0016%, surplus Fe, above-mentioned percentage are mass percent.
1160 DEG C of furnace temp, finishing temperature are 870 DEG C, and coiling temperature is 670 DEG C, and hot-rolled coil thickness is
2.70mm.Hot-rolled coil is subjected to the strip that 81.8% reduction ratio cold rolling is 0.5mm.Strip after cold rolling carries out final annealing,
Annealing temperature is 870 DEG C, that is, obtains the high intensity non-orientation silicon steel.
The magnetic strength B50 of non-orientation silicon steel finished product is that 1.71T or more, iron loss P1.5/50 are less than 3.94W/kg, and yield strength is
229MPa, tensile strength 391MPa, elongation percentage 36%.
By comparative example 1 it is found that formula in the variation of P element content and the difference of furnace temp, lead to yield strength
It is difficult to meet the requirements with tensile strength.
Comparative example 2
C：0.0019%, Si：1.50%, Mn：0.50%, Sb：0.034%, Al：0.326%, P：0.010%, S：
0.0021%, N：0.0019%, surplus Fe, above-mentioned percentage are mass percent.
1170 DEG C of furnace temp, finishing temperature are 850 DEG C, and coiling temperature is 680 DEG C, and hot-rolled coil thickness is
2.70mm.Hot-rolled coil is subjected to the strip that 81.8% reduction ratio cold rolling is 0.5mm.Strip after cold rolling carries out final annealing,
Annealing temperature is 880 DEG C, that is, obtains the high intensity non-orientation silicon steel.
The magnetic strength B50 of non-orientation silicon steel finished product is that 1.71T or more, iron loss P1.5/50 are less than 3.9W/kg, and yield strength is
236MPa, tensile strength 393MPa, elongation percentage 34%.
By comparative example 1 it is found that formula in the variation of P element content and the difference of furnace temp, lead to yield strength
It is difficult to meet the requirements with tensile strength.
In conclusion it can be seen from embodiment and comparative example result the present invention to the design of non-orientation silicon steel ingredient and
Hot rolling, cold rolling, the formulation of annealing process have higher mechanical property while so that non-orientation silicon steel is obtained good magnetic property.
Finally, it is to be noted that, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that including a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.
Claims (10)
1. a kind of high intensity non-orientation silicon steel, which is characterized in that chemical composition includes according to mass percent meter：C≤
0.0030%；Si：1.30%-2.00%；Mn：0.30%-0.70%；P：0.02%-0.10%；S≤0.0040%；N≤
0.0030%；Al：0.10%-0.40%, Sb：0.01%-0.07%, Nb+V+Ti≤0.0060%, surplus be Fe and it is other not
Evitable impurity element.
2. high intensity non-orientation silicon steel according to claim 1, which is characterized in that chemical composition is according to mass percent meter
Including：C：0.0025%, Si：1.66%, Mn：0.47%, Sb：0.039%, Al：0.282%, P：0.040%, S：
0.0039%, N：0.0017%, surplus Fe.
3. high intensity non-orientation silicon steel according to claim 1, which is characterized in that chemical composition is according to mass percent meter
Including：C：0.0020%, Si：1.63%, Mn：0.49%, Sb：0.041%, Al：0.294%, P：0.039%, S：
0.0029%, N：0.0008%, surplus Fe.
4. any high intensity non-orientation silicon steel of claims 1 to 3, is applied to the electrical sheet of industrial motor.
5. the manufacturing method of any high intensity non-orientation silicon steel of claims 1 to 3, which is characterized in that include smelting successively
Refining, casting, hot rolling, cold rolling and annealing, wherein
Hot rolling, 2h or more is kept the temperature first at 1120-1150 DEG C by the forging stock of casting, and subsequent hot rolled machine is no less than 7 passages and rolls
System, finishing temperature are 800~900 DEG C, and coiling temperature is 600~800 DEG C.
6. the manufacturing method of high intensity non-orientation silicon steel according to claim 5, which is characterized in that the casting is using company
Continuous casting mode.
7. the manufacturing method of high intensity non-orientation silicon steel according to claim 6, which is characterized in that
In casting process, the molten steel obtained will be smelted, 220mm thickness continuous casting billets is obtained using direct casting,
In hot-rolled process, hot rolled machine is no less than 7 passes and obtains 2.0-3.5mm thickness hot-strips；
The cold rolling is by Hot Rolling Strip to finished product thickness 0.50mm.
8. the manufacturing method of high intensity non-orientation silicon steel according to claim 7, which is characterized in that under the stagnation pressure of institute's hot rolling
Rate is 98.4%-99.1%, every time reduction ratio is 12%-30%.
9. the manufacturing method of high intensity non-orientation silicon steel according to claim 5, which is characterized in that annealing atmosphere is nitrogen
And hydrogen gas mixture, wherein hydrogen accounting is 4%-30%, dew-point temperature control at 0~30 DEG C, annealing temperature is 850~
950 DEG C, annealing belt speed is 90-120m/min.
10. the manufacturing method of any high intensity non-orientation silicon steel of claims 1 to 3, which is characterized in that including：
(1), it smelts：Obtain molten steel；
(2), it casts：The molten steel that step (1) is obtained is obtained into 220mm thickness continuous casting billets using direct casting；
(3), hot rolling：The strand for obtaining step (2) at 1120-1150 DEG C keeps the temperature 2h or more, and subsequent hot rolled machine is no less than 7
Passes, obtain 2.0-3.5mm thickness hot-strips, total reduction 98.4%-99.1%, every time reduction ratio is 12%-
30%, finishing temperature is 800~900 DEG C, and coiling temperature is 600~800 DEG C；
(4), cold rolling：Using 5 frame tandem mill groups, by Hot Rolling Strip to finished product thickness 0.50mm；
(5), it anneals：It anneals in continuous annealing furnace, atmosphere is nitrogen and hydrogen gas mixture, and wherein hydrogen accounting is
4%-30%, at 0~30 DEG C, annealing temperature is 850~950 DEG C for dew-point temperature control, and annealing belt speed is 90-120m/min.
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Cited By (12)
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| CN109825775A (en) * | 2019-04-04 | 2019-05-31 | 中山市中圣金属板带科技有限公司 | A kind of cold rolling non-oriented electrical steel 35WD1900 and its production method |
| CN111235462A (en) * | 2020-03-04 | 2020-06-05 | 马鞍山钢铁股份有限公司 | Easy-blanking electrical steel for high-efficiency fixed-frequency compressor, manufacturing method of easy-blanking electrical steel, iron core prepared from easy-blanking electrical steel and heat treatment method of iron core |
| CN112080695A (en) * | 2020-08-31 | 2020-12-15 | 江苏省沙钢钢铁研究院有限公司 | High-silicon non-oriented electrical steel and production method thereof |
| CN112143961A (en) * | 2019-06-28 | 2020-12-29 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with excellent magnetic property and continuous annealing method thereof |
| CN112143963A (en) * | 2019-06-28 | 2020-12-29 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with excellent magnetic property and continuous annealing method thereof |
| CN112143964A (en) * | 2019-06-28 | 2020-12-29 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with extremely low iron loss and continuous annealing process thereof |
| CN112176250A (en) * | 2020-09-19 | 2021-01-05 | 张家港扬子江冷轧板有限公司 | Non-oriented silicon steel for high-speed drive motor and manufacturing method thereof |
| CN114774780A (en) * | 2022-03-29 | 2022-07-22 | 湖南华菱涟钢特种新材料有限公司 | Non-oriented electrical steel and method for producing same |
| CN114854966A (en) * | 2022-04-12 | 2022-08-05 | 湖南华菱涟钢特种新材料有限公司 | Electrical steel, method for producing same and product |
| CN115323283A (en) * | 2022-08-18 | 2022-11-11 | 山西太钢不锈钢股份有限公司 | Low-alloy high-strength non-oriented silicon steel and production method thereof |
| CN116240471A (en) * | 2023-02-21 | 2023-06-09 | 包头钢铁（集团）有限责任公司 | Sb-containing non-oriented silicon steel 50W600 and preparation method thereof |
| CN114854966B (en) * | 2022-04-12 | 2024-05-10 | 湖南华菱涟钢特种新材料有限公司 | Electrical steel, preparation method and product thereof |
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| CN112080695A (en) * | 2020-08-31 | 2020-12-15 | 江苏省沙钢钢铁研究院有限公司 | High-silicon non-oriented electrical steel and production method thereof |
| CN112176250A (en) * | 2020-09-19 | 2021-01-05 | 张家港扬子江冷轧板有限公司 | Non-oriented silicon steel for high-speed drive motor and manufacturing method thereof |
| CN112176250B (en) * | 2020-09-19 | 2021-11-26 | 张家港扬子江冷轧板有限公司 | Non-oriented silicon steel for high-speed drive motor and manufacturing method thereof |
| CN114774780A (en) * | 2022-03-29 | 2022-07-22 | 湖南华菱涟钢特种新材料有限公司 | Non-oriented electrical steel and method for producing same |
| CN114854966A (en) * | 2022-04-12 | 2022-08-05 | 湖南华菱涟钢特种新材料有限公司 | Electrical steel, method for producing same and product |
| CN114854966B (en) * | 2022-04-12 | 2024-05-10 | 湖南华菱涟钢特种新材料有限公司 | Electrical steel, preparation method and product thereof |
| CN115323283A (en) * | 2022-08-18 | 2022-11-11 | 山西太钢不锈钢股份有限公司 | Low-alloy high-strength non-oriented silicon steel and production method thereof |
| CN115323283B (en) * | 2022-08-18 | 2023-08-11 | 山西太钢不锈钢股份有限公司 | Low-alloy high-strength non-oriented silicon steel and production method thereof |
| CN116240471A (en) * | 2023-02-21 | 2023-06-09 | 包头钢铁（集团）有限责任公司 | Sb-containing non-oriented silicon steel 50W600 and preparation method thereof |
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