CN108504926A - New-energy automobile non-oriented electrical steel and its production method - Google Patents
New-energy automobile non-oriented electrical steel and its production method Download PDFInfo
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- CN108504926A CN108504926A CN201810310722.5A CN201810310722A CN108504926A CN 108504926 A CN108504926 A CN 108504926A CN 201810310722 A CN201810310722 A CN 201810310722A CN 108504926 A CN108504926 A CN 108504926A
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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
- 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
- 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
- C21D8/1233—Cold rolling
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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
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
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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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Abstract
The invention discloses a kind of new-energy automobile non-oriented electrical steel and its production methods, are related to non-oriented electrical steel and its production method.The present invention includes the following steps：Step A：It smelts；Step B：Continuous casting；Step C：Heating；Step D：Dephosphorization；Step E：Roughing；Step F：It is sent into Coil Box processing；Step G：Finish rolling；Step H：It batches；Step I：Once cold rolling；Step J：Intermediate annealing；Step K：Secondary cold-rolling；Step L：Final annealing.It is an object of the invention to overcome the shortcomings of that existing production technology is difficult to meet new-energy automobile non-oriented electrical steel requirement, a kind of new-energy automobile non-oriented electrical steel and its production method are provided, low iron loss under high frequency, high magnetic strength and the good ultra-thin non-oriented electrical steel of new-energy automobile of surface quality can be produced.
Description
Technical field
The present invention relates to non-oriented electrical steel and its production methods, more specifically to a kind of new-energy automobile nothing
Oriented electrical steel and its production method.
Background technology
Non-oriented electrical steel is carbon containing very low silicon-iron soft magnetic alloy, is indispensable in electric power, electronics and war industry
Important materials.Non-oriented electrical steel is the motor to work in rotating excitation field and the core material of generator amature, it is desirable that
With good magnetic property and processing performance.In recent years, right with the new-energy automobile development of motor high speed and miniaturization
More stringent requirements are proposed for the performance of non-oriented electrical steel, such as has low iron loss and high magnetic induction in high frequency.
Basic demand of electronic (the EV)/hybrid vehicle (HEV) of new-energy automobile-to electrical sheet：(1) it is sent out in automobile
High torque is needed when dynamic acceleration, it is desirable that electric steel plate there should be high magnetic induction；(2) it under motor high-speed rotation, accounts for
It is iron loss that ratio is maximum in motor loss, and therefore, being specially required with non-oriented electrical steel to high-speed motor has low high frequency
Iron loss, and it is plate thickness to be thinned, therefore the motor in new-energy automobile is all using ultra-thin to reduce eddy-current loss most efficient method
The high high-efficiency non-oriented electrical sheet of the trade mark.
The patent applications such as patent publication No. CN 103882293A, CN 1611616A and CN 1888111A are all made of various
The exploitation of technique progress non-oriented electrical steel, but disadvantage is that：(1) most finished product thicknesses are 0.5mm, and
Cold rolling reduction ratio is all higher than 70%, and when cold rolling reduction ratio further increases, and when especially greater than 80%, (111) texture is quick
Increase, (100) texture is suppressed, totally unfavorable to magnetic strength, cannot be satisfied the high magnetic strength requirement of new-energy automobile non-orientation silicon steel；
(2) Calcium treatment is used in the technical solution of part of the patent application, although Calcium treatment can modify field trash, cannot significantly reduced
The amount of inclusions；(3) hot-rolled process hot rolled coil need to be batched in 700 DEG C or more high temperature, cause hot rolled coil scale on surface
Densification increases burden when pickling；(4) silicone content is relatively low in the technical solution of part of the patent application, the low trade mark, iron in belonging to
Damage is higher, cannot be satisfied the low iron loss requirement of new-energy automobile non-orientation silicon steel；(5) its magnetic core loss value under the conditions of high-frequency
It cannot be satisfied the requirement of new-energy automobile.
In conclusion to reach the requirement of low iron loss under new-energy automobile non-oriented electrical steel high frequency, it is necessary to using high
Grade silicon steel, but silicone content is improved, and surface corrugations shape defect can be caused to generate；And under thickness ultrathin inevitable requirement cold rolling
Rate increases, and increases so as to cause (111) plane texture, unfavorable to magnetic strength.Therefore, how to produce low iron loss under high frequency, high magnetic strength and
The ultra-thin non-oriented electrical steel of the good new-energy automobile of surface quality, be in the prior art urgent need to resolve the technical issues of.
Invention content
1. technical problems to be solved by the inivention
It is an object of the invention to overcome existing production technology to be difficult to meet new-energy automobile to be used with non-oriented electrical steel
It is required that deficiency, provide a kind of new-energy automobile non-oriented electrical steel and its production method, can produce under high frequency
Low iron loss, high magnetic strength and the good ultra-thin non-oriented electrical steel of new-energy automobile of surface quality.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
The new-energy automobile non-oriented electrical steel of the present invention, chemical composition mass percent are：
Si：3.0~4.0%, Al：1.0~2.0%, [Si+Al] >=4.5%, Mn：1.0~2.0%, S≤30ppm, O≤
30ppm, C≤20ppm, N≤20ppm, Ti≤30ppm, [S+O+C+N+Ti]≤80ppm, [Sn or Sb or Sn+Sb]：0.01~
0.1%, rare earth element：0.001~0.1%, surplus is Fe and other impurities element.
The production method of the new-energy automobile non-oriented electrical steel of the present invention, includes the following steps：
Step A：It smelts；
Step B：Continuous casting；
Step C：Heating；
Step D：Dephosphorization；
Step E：Roughing；
Step F：It is sent into Coil Box processing；
Step G：Finish rolling；
Step H：It batches；
Step I：Once cold rolling；
Step J：Intermediate annealing；
Step K：Secondary cold-rolling；
Step L：Final annealing.
As further improvement of the present invention, in step A smelting processes, converter smelting is carried out first, then carries out RH
Refining treatment, molten steel terminal chemical composition mass percent is after processing：
Si：3.0~4.0%, Al：1.0~2.0%, [Si+Al] >=4.5%, Mn：1.0~2.0%, S≤30ppm, O≤
30ppm, C≤20ppm, N≤20ppm, Ti≤30ppm, [S+O+C+N+Ti]≤80ppm, [Sn or Sb or Sn+Sb]：0.01~
0.1%, rare earth element：0.001~0.1%, surplus is Fe and other impurities element；
The rare earth element is added in 1~2 minute after RH refined alloys, is carried out after the rare earth element is added
Stirring, mixing time >=3 minute；The rare earth element is any one in La, Ce, Nd or arbitrary two kinds of mixing or three kinds
Mixing.
As further improvement of the present invention, in step B casting process, when controlling continuous casting pulling rate be 0.6~2.0 meter/
Minute, continuous casting obtains the strand that thickness is 200~300mm；Step B casting process uses electromagnetic agitation, and controls tundish
The degree of superheat (- 5~0) DEG C ensures equiaxial crystal ratio >=90%.
As further improvement of the present invention, in step C heating processes, using hot-loading and hot-conveying, strand is into furnace temperature ﹥
650 DEG C, 950~1150 DEG C of heating temperature, heating time >=3 hour；In step E rough rolling process, start rolling temperature 950~1100
DEG C, obtain the intermediate base that thickness is 20~30mm, wherein control roughing total reduction >=90%.
As further improvement of the present invention, step F is sent into Coil Box processing procedure, and intermediate base exchanges end to end.
As further improvement of the present invention, in step G finishing stands, 950~1050 DEG C of start rolling temperature, finishing temperature
880~920 DEG C, obtain the hot rolled plate that thickness is 0.8~1.0mm；In step H coiling processes, oiler temperature control be 600~
700℃；During step I once cold rollings, once cold rolling to thickness is 0.40~0.50mm；During step J intermediate annealings, control
Intermediate anneal temperature processed is 800~900 DEG C, soaking time 2~5 minutes；During step K secondary cold-rollings, secondary cold-rolling to thickness
Degree is 0.20~0.25mm；During step L final annealings, control final annealing temperature is 950~1200 DEG C, soaking time 2
~5 minutes.
As further improvement of the present invention, step G finishing stands control finish rolling reduction ratio >=95%；Step I is primary
Process control of cold rolling reduction ratio 50~60%；Step K secondary cold-rolling process control reduction ratio 50~60%.
As further improvement of the present invention, step I once cold rollings process, step K secondary cold-rolling processes are all made of cold
Tandem rolling.
As further improvement of the present invention, step J intermediate annealings process, step L final annealing processes are all made of company
Continuous annealing furnace, heat-treating atmosphere are 100% hydrogen.
3. advantageous effect
Using technical solution provided by the invention, compared with prior art, there is following remarkable result：
(1) production method of new-energy automobile non-oriented electrical steel of the invention, each technique of step A to step L
Parameter cooperates, and can produce low iron loss under high frequency, high magnetic strength and the good new-energy automobile of surface quality and be taken with ultra-thin nothing
To electrical sheet.
(2) production method of new-energy automobile non-oriented electrical steel of the invention, wherein when step A smelts, molten steel at
Set up raising manganese content in meter separately, magnetic strength can be improved in addition Sn, Sb；Increase rare earth element can deep purifying molten steel, ensure it is ultra-pure
Net molten steel controls the amount of inclusions, improves magnetic strength；It designs in molten steel [Si+Al] >=4.5%, 0.20~0.25mm of finished product thickness,
Ensure to obtain low iron loss under high frequency；Step B casting process is poured into a mould using electromagnetic agitation+negative degree of superheat, and guarantee equiaxial crystal ratio >=
90%, reduce the high temperature coiling and normalizing process in traditional handicraft, eliminates surface corrugations defect；Cold-rolled process is using in secondary
Equal reduction ratios control, obtains preferential orientation texture, improves magnetic strength；Step F is sent into Coil Box processing procedure, and intermediate base is mutual end to end
It changes so that intermediate base temperature is uniform, to ensure the stability of finished product magnetic property；1~2 minute after RH refined alloys
Interior addition rare earth element is stirred, mixing time >=3 minute after rare earth element is added, and ensures inclusion floating；Once cold rolling
And secondary cold-rolling is all made of cold continuous rolling, can significantly improve yield；The above designing points collective effect, to obtain low iron under high frequency
The good ultra-thin non-orientation silicon steel of new-energy automobile of damage, high magnetic strength, surface quality.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the flow chart of the production method of the new-energy automobile non-oriented electrical steel of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Therefore, the embodiment of the present invention to providing in the accompanying drawings below
Detailed description be not intended to limit the range of claimed invention, but be merely representative of the present invention selected embodiment.
Based on the embodiments of the present invention, what those of ordinary skill in the art were obtained without creative efforts is all
Other embodiment shall fall within the protection scope of the present invention.
With reference to figure 1, the production method of new-energy automobile non-oriented electrical steel of the invention includes the following steps：
Step A：It smelts；
In step A smelting processes, converter smelting is carried out first, then carries out RH refining treatments, molten steel terminal after processing
Learning ingredient percent is：
Si：3.0~4.0%, Al：1.0~2.0%, [Si+Al] >=4.5%, Mn：1.0~2.0%, S≤30ppm, O≤
30ppm, C≤20ppm, N≤20ppm, Ti≤30ppm, [S+O+C+N+Ti]≤80ppm, [Sn or Sb or Sn+Sb]：0.01~
0.1%, rare earth element：0.001~0.1%, surplus is Fe and other impurities element；
Rare earth element is added in 1~2 minute after RH refined alloys, is stirred, stirs after rare earth element is added
It mixes the time >=3 minutes；The above rare earth element is any one in La, Ce, Nd or arbitrary two kinds of mixing or three kinds of mixing.
Step B：Continuous casting；
In step B casting process, control continuous casting when pulling rate be 0.6~2.0 m/min, continuous casting obtain thickness be 200~
The strand of 300mm；Step B casting process uses electromagnetic agitation, and controls the tundish degree of superheat (- 5~0) DEG C, ensures isometric
Brilliant rate >=90%；
Step C：Heating；
In step C heating processes, using hot-loading and hot-conveying, strand is into 650 DEG C of furnace temperature ﹥, 950~1150 DEG C of heating temperature,
Heating time >=3 hour；
Step D：Dephosphorization；
Step E：Roughing；
In step E rough rolling process, 950~1100 DEG C of start rolling temperature obtains the intermediate base that thickness is 20~30mm, wherein
Control roughing total reduction >=90%；
Step F：It is sent into Coil Box processing；
Step F is sent into Coil Box processing procedure, and intermediate base exchanges end to end；It is accurate after i.e. intermediate base is handled in Coil Box
Before entering finishing rolling step, intermediate base is exchanged end to end；
Step G：Finish rolling；
In step G finishing stands, 950~1050 DEG C of start rolling temperature, 880~920 DEG C of finishing temperature, it is 0.8 to obtain thickness
The hot rolled plate of~1.0mm；Control finish rolling reduction ratio >=95%；
Step H：It batches；
In step H coiling processes, oiler temperature control is 600~700 DEG C；
Step I：Once cold rolling；
During step I once cold rollings, using cold continuous rolling, once cold rolling to thickness is 0.40~0.50mm；Control pressure
Rate 50~60%；
Step J：Intermediate annealing；
During step J intermediate annealings, control intermediate anneal temperature is 800~900 DEG C, soaking time 2~5 minutes；It adopts
With continuous annealing furnace, heat-treating atmosphere is 100% hydrogen；
Step K：Secondary cold-rolling；
During step K secondary cold-rollings, using cold continuous rolling, secondary cold-rolling to thickness is 0.20~0.25mm；Control pressure
Rate 50~60%；
Step L：Final annealing；
During step L final annealings, control final annealing temperature is 950~1200 DEG C, soaking time 2~5 minutes；It adopts
With continuous annealing furnace, heat-treating atmosphere is 100% hydrogen.
Reach the requirement of low iron loss under new-energy automobile non-oriented electrical steel high frequency, it is necessary to high grade silicon steel is used,
But silicone content is improved, and surface corrugations shape defect can be caused to generate；And thickness ultrathin inevitable requirement cold rolling reduction ratio increases, from
And (111) plane texture is caused to increase, it is unfavorable to magnetic strength.In view of the above problems, the new-energy automobile of the present invention is with No yield point electrician
Each technological parameter of the production method of steel, step A to step L cooperates, and can produce low iron loss under high frequency, high magnetic strength
And the ultra-thin non-oriented electrical steel of new-energy automobile that surface quality is good.
The production method of the new-energy automobile non-oriented electrical steel of the present invention, wherein when step A smelts, molten steel composition
Manganese content is improved in design, magnetic strength can be improved in addition Sn, Sb；Increase rare earth element can deep purifying molten steel, ensure superelevation it is pure
Molten steel controls the amount of inclusions, improves magnetic strength；It designs in molten steel [Si+Al] >=4.5%, 0.20~0.25mm of finished product thickness is protected
Low iron loss is obtained under card high frequency；Step B casting process is poured into a mould using electromagnetic agitation+negative degree of superheat, and guarantee equiaxial crystal ratio >=
90%, reduce the high temperature coiling and normalizing process in traditional handicraft, eliminates surface corrugations defect；Cold-rolled process is using in secondary
Equal reduction ratios control, obtains preferential orientation texture, improves magnetic strength；Step F is sent into Coil Box processing procedure, and intermediate base is mutual end to end
It changes so that intermediate base temperature is uniform, to ensure the stability of finished product magnetic property；1~2 minute after RH refined alloys
Interior addition rare earth element is stirred, mixing time >=3 minute after rare earth element is added, and ensures inclusion floating；Once cold rolling
And secondary cold-rolling is all made of cold continuous rolling, can significantly improve yield；The above designing points collective effect, to obtain low iron under high frequency
The good ultra-thin non-orientation silicon steel of new-energy automobile of damage, high magnetic strength, surface quality.
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the embodiments.
Embodiment 1
The production method of the new-energy automobile non-oriented electrical steel of the present embodiment, includes the following steps：
Step A：It smelts；
In step A smelting processes, converter smelting is carried out first, then carries out RH refining treatments, molten steel terminal after processing
Learning ingredient percent is：
Si：3.0%, Al：2.0%, Mn：2.0%, S：15ppm, O：20ppm, C：10ppm, N：17ppm, Ti：8ppm, [S
+ O+C+N+Ti]≤80ppm, [Sn+Sb]：0.03%, [La+Ce+Nd]：0.002%, surplus is Fe and other impurities element；
It is added rare earth element after 1 minute after RH refined alloys, is stirred after rare earth element is added, when stirring
Between 3.5 minutes；
Step B：Continuous casting；
In step B casting process, pulling rate is 0.6 m/min when controlling continuous casting, and continuous casting obtains the strand that thickness is 220mm；
Step B casting process uses electromagnetic agitation, and controls -2 DEG C of the tundish degree of superheat, equiaxial crystal ratio 95%；
Step C：Heating；
In step C heating processes, using hot-loading and hot-conveying, strand is into 680 DEG C of furnace temperature, 1080 DEG C of heating temperature, when heating
Between 3.5 hours；
Step D：Dephosphorization；
Step E：Roughing；
In step E rough rolling process, 1050 DEG C of start rolling temperature obtains the intermediate base that thickness is 20mm, wherein under roughing stagnation pressure
Rate 90.91%；
Step F：It is sent into Coil Box processing；
Step F is sent into Coil Box processing procedure, and intermediate base exchanges end to end；
Step G：Finish rolling；
In step G finishing stands, 1000 DEG C of start rolling temperature, 880 DEG C of finishing temperature obtains the hot rolling that thickness is 0.80mm
Plate；Control finish rolling reduction ratio 96%；
Step H：It batches；
In step H coiling processes, oiler temperature control is 600 DEG C；
Step I：Once cold rolling；
During step I once cold rollings, using cold continuous rolling, once cold rolling to thickness is 0.40mm；Control reduction ratio 50%；
Step J：Intermediate annealing；
During step J intermediate annealings, control intermediate anneal temperature is 800 DEG C, soaking time 3 minutes；Using continuously moving back
Stove, heat-treating atmosphere are 100% hydrogen；
Step K：Secondary cold-rolling；
During step K secondary cold-rollings, using cold continuous rolling, secondary cold-rolling to thickness is 0.20mm；Control reduction ratio 50%；
Step L：Final annealing；
During step L final annealings, control final annealing temperature is 1000 DEG C, soaking time 2 minutes；Using continuously moving back
Stove, heat-treating atmosphere are 100% hydrogen.
Embodiment 2
The production method of the new-energy automobile non-oriented electrical steel of the present embodiment, includes the following steps：
Step A：It smelts；
In step A smelting processes, converter smelting is carried out first, then carries out RH refining treatments, molten steel terminal after processing
Learning ingredient percent is：
Si：3.5%, Al：1.5%, Mn：1.5%, S：12ppm, O：15ppm, C：10ppm, N：15ppm, Ti：5ppm,
Sn：0.05%, La：0.005%, surplus is Fe and other impurities element；
It is added rare earth element when 2 minutes after RH refined alloys, is stirred after rare earth element is added, when stirring
Between 3 minutes；
Step B：Continuous casting；
In step B casting process, pulling rate is 1.0 ms/min when controlling continuous casting, and continuous casting obtains the strand that thickness is 250mm；
Step B casting process uses electromagnetic agitation, and controls -5 DEG C of the tundish degree of superheat, equiaxial crystal ratio 92%；
Step C：Heating；
In step C heating processes, using hot-loading and hot-conveying, strand is into 750 DEG C of furnace temperature, 1150 DEG C of heating temperature, when heating
Between 3 hours；
Step D：Dephosphorization；
Step E：Roughing；
In step E rough rolling process, 1100 DEG C of start rolling temperature obtains the intermediate base that thickness is 25mm, wherein control roughing is total
Reduction ratio 90%；
Step F：It is sent into Coil Box processing；
Step F is sent into Coil Box processing procedure, and intermediate base exchanges end to end；
Step G：Finish rolling；
In step G finishing stands, 1050 DEG C of start rolling temperature, 920 DEG C of finishing temperature obtains the hot rolling that thickness is 0.90mm
Plate；Control finish rolling reduction ratio 96.4%；
Step H：It batches；
In step H coiling processes, oiler temperature control is 650 DEG C；
Step I：Once cold rolling；
During step I once cold rollings, using cold continuous rolling, once cold rolling to thickness is 0.45mm；Control reduction ratio 50%；
Step J：Intermediate annealing；
During step J intermediate annealings, control intermediate anneal temperature is 850 DEG C, soaking time 4 minutes；Using continuously moving back
Stove, heat-treating atmosphere are 100% hydrogen；
Step K：Secondary cold-rolling；
During step K secondary cold-rollings, using cold continuous rolling, secondary cold-rolling to thickness is 0.20mm；Control reduction ratio
55.56%；
Step L：Final annealing；
During step L final annealings, control final annealing temperature is 1150 DEG C, soaking time 4 minutes；Using continuously moving back
Stove, heat-treating atmosphere are 100% hydrogen.
Embodiment 3
The production method of the new-energy automobile non-oriented electrical steel of the present embodiment, includes the following steps：
Step A：It smelts；
In step A smelting processes, converter smelting is carried out first, then carries out RH refining treatments, molten steel terminal after processing
Learning ingredient percent is：
Si：4.0%, Al：1.0%, Mn：1.0%, S：18ppm, O：12ppm, C：10ppm, N：15ppm, Ti：5ppm,
Sb：0.1%, [La+Ce]：0.1%, surplus is Fe and other impurities element；
It is added rare earth element when 2 minutes after RH refined alloys, is stirred after rare earth element is added, when stirring
Between 4 minutes；
Step B：Continuous casting；
In step B casting process, pulling rate is 2.0 ms/min when controlling continuous casting, and continuous casting obtains the strand that thickness is 300mm；
Step B casting process uses electromagnetic agitation, and controls -5 DEG C of the tundish degree of superheat, ensures equiaxial crystal ratio 90%；
Step C：Heating；
In step C heating processes, using hot-loading and hot-conveying, strand is into 700 DEG C of furnace temperature, 1150 DEG C of heating temperature, when heating
Between 4 hours；
Step D：Dephosphorization；
Step E：Roughing；
In step E rough rolling process, 1100 DEG C of start rolling temperature obtains the intermediate base that thickness is 30mm, wherein control roughing is total
Reduction ratio 90%；
Step F：It is sent into Coil Box processing；
Step F is sent into Coil Box processing procedure, and intermediate base exchanges end to end；
Step G：Finish rolling；
In step G finishing stands, 1050 DEG C of start rolling temperature, 920 DEG C of finishing temperature obtains the hot rolled plate that thickness is 1.0mm；
Control finish rolling reduction ratio 96.67%；
Step H：It batches；
In step H coiling processes, oiler temperature control is 700 DEG C；
Step I：Once cold rolling；
During step I once cold rollings, using cold continuous rolling, once cold rolling to thickness is 0.50mm；Control reduction ratio 50%；
Step J：Intermediate annealing；
During step J intermediate annealings, control intermediate anneal temperature is 900 DEG C, soaking time 5 minutes；Using continuously moving back
Stove, heat-treating atmosphere are 100% hydrogen；
Step K：Secondary cold-rolling；
During step K secondary cold-rollings, using cold continuous rolling, secondary cold-rolling to thickness is 0.25mm；Control reduction ratio 50%；
Step L：Final annealing；
During step L final annealings, control final annealing temperature is 1200 DEG C, soaking time 5 minutes；Using continuously moving back
Stove, heat-treating atmosphere are 100% hydrogen.
The magnetic property for the non-oriented electrical steel that specific embodiment 1-3 is produced is shown in that table 1 below, embodiment 1-3 are produced
Non-oriented electrical steel finished surface without corrugation defect, surface quality is good.
1 magnetic property of table
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. new-energy automobile non-oriented electrical steel, which is characterized in that its chemical composition mass percent is：
Si：3.0~4.0%, Al：1.0~2.0%, [Si+Al] >=4.5%, Mn：1.0~2.0%, S≤30ppm, O≤
30ppm, C≤20ppm, N≤20ppm, Ti≤30ppm, [S+O+C+N+Ti]≤80ppm, [Sn or Sb or Sn+Sb]：0.01~
0.1%, rare earth element：0.001~0.1%, surplus is Fe and other impurities element.
2. the production method of new-energy automobile non-oriented electrical steel, it is characterised in that include the following steps：
Step A：It smelts；
Step B：Continuous casting；
Step C：Heating；
Step D：Dephosphorization；
Step E：Roughing；
Step F：It is sent into Coil Box processing；
Step G：Finish rolling；
Step H：It batches；
Step I：Once cold rolling；
Step J：Intermediate annealing；
Step K：Secondary cold-rolling；
Step L：Final annealing.
3. the production method of new-energy automobile non-oriented electrical steel according to claim 1, it is characterised in that：Step A
In smelting process, converter smelting is carried out first, then carries out RH refining treatments, molten steel terminal chemical composition quality percentage after processing
Than for：
Si：3.0~4.0%, Al：1.0~2.0%, [Si+Al] >=4.5%, Mn：1.0~2.0%, S≤30ppm, O≤
30ppm, C≤20ppm, N≤20ppm, Ti≤30ppm, [S+O+C+N+Ti]≤80ppm, [Sn or Sb or Sn+Sb]：0.01~
0.1%, rare earth element：0.001~0.1%, surplus is Fe and other impurities element；
The rare earth element is added in 1~2 minute after RH refined alloys, is stirred after the rare earth element is added
It mixes, mixing time >=3 minute；The rare earth element is the mixed of any one or arbitrary two kinds of mixing or three kinds in La, Ce, Nd
It closes.
4. the production method of new-energy automobile non-oriented electrical steel according to claim 3, it is characterised in that：Step B
In casting process, pulling rate is 0.6~2.0 m/min when controlling continuous casting, and continuous casting obtains the strand that thickness is 200~300mm；Step
Rapid B casting process uses electromagnetic agitation, and controls the tundish degree of superheat (- 5~0) DEG C, ensures equiaxial crystal ratio >=90%.
5. the production method of new-energy automobile non-oriented electrical steel according to claim 4, it is characterised in that：Step C
In heating process, using hot-loading and hot-conveying, strand is into 650 DEG C of furnace temperature ﹥, and 950~1150 DEG C of heating temperature, heating time >=3 are small
When；In step E rough rolling process, 950~1100 DEG C of start rolling temperature obtains the intermediate base that thickness is 20~30mm, wherein control is thick
Roll total reduction >=90%.
6. the production method of new-energy automobile non-oriented electrical steel according to claim 5, it is characterised in that：Step F
It is sent into Coil Box processing procedure, intermediate base exchanges end to end.
7. the production method of new-energy automobile non-oriented electrical steel according to claim 6, it is characterised in that：Step G
In finishing stands, 950~1050 DEG C of start rolling temperature, 880~920 DEG C of finishing temperature obtains the hot rolling that thickness is 0.8~1.0mm
Plate；In step H coiling processes, oiler temperature control is 600~700 DEG C；During step I once cold rollings, once cold rolling to thickness
Degree is 0.40~0.50mm；During step J intermediate annealings, control intermediate anneal temperature is 800~900 DEG C, soaking time 2~
5 minutes；During step K secondary cold-rollings, secondary cold-rolling to thickness is 0.20~0.25mm；During step L final annealings, control
Final annealing temperature processed is 950~1200 DEG C, soaking time 2~5 minutes.
8. the production method of new-energy automobile non-oriented electrical steel according to claim 7, it is characterised in that：Step G
Finishing stands control finish rolling reduction ratio >=95%；Step I once cold rolling process control reduction ratio 50~60%；Step K bis- times is cold
Roll process control reduction ratio 50~60%.
9. the production method of new-energy automobile non-oriented electrical steel according to any one of claims 1 to 8, feature
It is：Step I once cold rollings process, step K secondary cold-rolling processes are all made of cold continuous rolling.
10. the production method of new-energy automobile non-oriented electrical steel according to any one of claims 1 to 8, feature
It is：Step J intermediate annealings process, step L final annealing processes are all made of continuous annealing furnace, and heat-treating atmosphere is 100% hydrogen
Gas.
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