CN109097687A - The preparation method of non-orientation silicon steel for direct-driving type wind power generation machine - Google Patents
The preparation method of non-orientation silicon steel for direct-driving type wind power generation machine Download PDFInfo
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Abstract
The present invention relates to non-orientation silicon steel production technical field more particularly to a kind of preparation methods of the non-orientation silicon steel for direct-driving type wind power generation machine.Preparation method designed by the present invention for the non-orientation silicon steel of direct-driving type wind power generation machine includes smelting and being casting continuously to form base, hot rolling, normalizing, pickling and cold-rolling, alkali cleaning continuous annealing process; in the smelting procedure; the range of each ingredient of the molten steel of non-orientation silicon steel and each ingredient is optimized; it reduces the iron loss of non-orientation silicon steel, improve magnetic property and corrosion resistance, that is, improve the low frequency performance and corrosion resisting property of non-orientation silicon steel.
Description
Technical field
The present invention relates to non-orientation silicon steel production technical field more particularly to a kind of nothings for direct-driving type wind power generation machine
The preparation method of orientation silicon steel.
Background technique
Currently, direct-driving type wind power generation machine generally uses permanent magnetic synchronous motor structure, to obtain higher generating efficiency.
But there is a problem of that low frequency performance is bad currently used for non-orientation silicon steel in direct-driving type wind power generation machine, it is not able to satisfy direct-driving type
The requirement of wind-driven generator.The evaluation parameter of general low frequency performance is P1.5/10≤ 0.60w/kg, B5000≥1.730T。
Such as the Chinese invention patent application file that application publication number is CN106487117A, it discloses a kind of wind-power electricity generations
Machine stator silicon steel sheet, the silicon steel sheet ontology (1) are welded by the fan-shaped silicon steel blade unit (2) at multiple identical central angles,
The inward flange of the silicon steel blade unit (2) is concaved with multiple wire casings (3), and the width of the silicon steel sheet ontology (1) is 130~
160mm, with a thickness of 0.3mm, the chemical component of silicon steel sheet is: C 0.04~0.05wt%, Si 3.20~3.80wt%, Mn
0.06~0.07wt%, P 0.010~0.017wt%, S 0.004~0.005wt%, Sn 0.08~0.128wt%, Cu
0.05~0.06wt% of 0.10~0.15wt%, Al, remaining is Fe.It the invention aerogenerator stator silicon steel sheet and its rolls
Method processed saves material, and core loss value is lower, but does not have performance indicator, and especially no low frequency performance does not emphasize anti-corrosion energy yet
Power.
For another example application publication number is the Chinese patent application file of CN106435395A, and it discloses a kind of wind-driven generators
Stator silicon steel sheet, the silicon steel sheet ontology (1) are welded by the fan-shaped silicon steel blade unit (2) at multiple identical central angles, institute
The inward flange for stating silicon steel blade unit (2) is concaved with multiple wire casings (3), the material of the silicon steel sheet ontology (1) are as follows: C
0.06-0.08%, Si 2.6-3.2%, Mn 0.15-0.25%, Als 0.02-0.03%, Co 0.2-0.25%, Cr
0.15-0.25%, Sn 0.05-0.1%, V 0.03-0.05%, Hf 0.015-0.025%, Ta 0.008-0.012%, B
0.002-0.003%, N 0.004-0.005%, Sc 0.02-0.03%, Gd 0.015-0.025%, Yb 0.01-0.02%,
P≤0.05%, S≤0.0025%, remaining is Fe.The noble metals such as Co, Sc, Gd, Yb are added in the invention, are unfavorable for reducing cost,
And without other performance index requirement.
The for another example Chinese invention patent that authorization publication No. is CN105886932B, it discloses a kind of High Power Factor motors
With non-orientation silicon steel, component and wt% are as follows: C :≤0.0020%, Si:1.70~1.90%, Mn:0.10~0.20%, P :≤
0.05%, S :≤0.0030%, Al:0.25~0.35%, Cr:0.05~0.50%, N :≤0.0020%；Production stage: it adopts
It is smelted with clean steel mode and at base；Slab is heated；Hot rolling；It batches；Normalizing；Pickling；Cold rolling；The finished product under N2+H2 atmosphere
Annealing；Routinely carry out cooling, coating and finishing.The invention is with a thickness of 0.50mm, iron loss P1.5/50≤3.3W/kg, B5000
≥1.74T.The patent, which focuses on, obtains higher power factor, without low frequency performance, also without rustless property.
The for another example Chinese invention patent that authorization publication No. is CN104294185B, it discloses a kind of high efficiency motor nothings to take
To electrical sheet, chemical constituent and weight percent are as follows: C :≤0.0030%, Si:1.9~2.1%, Mn:0.28~0.32%,
Al:0.10~0.60%, P:0.01~0.06%, S≤0.0050%, Cu:0.10~0.30%, Sb:0.02~0.05%, N
≤ 0.0030%；Production technology: it smelts；Cogging；Square billet is forged into repeatedly；Heating；Hot rolling；Normalizing；Pickling；Cold rolling；Heat treatment.
The invention is with a thickness of 0.50mm, iron loss P1.5/50≤3.3W/kg, B5000 >=1.73T.The invention is intended to answer on high efficiency motor
With, do not emphasize low frequency performance, also do not emphasize obtain low frequency performance production method.
For another example the Chinese invention patent that authorization publication No. is CN103436796B, it discloses a kind of frequency-changeable compressor nothings
Oriented electrical steel, chemical constituent and weight percent are as follows: C:0.001~0.015%, Si:2.0~2.5%, Al:0.15~
0.55%, Mn:0.15~0.55%, Cr:0.01~0.039%, Sn≤0.12%, P≤0.08%, S≤0.015%, N≤
0.008%；Production technology: it is smelted using clean steel process and is casting continuously to form base；Base heating will be casting continuously to form；Roughing；Finish rolling；It batches；
Normalizing；Pickling；Cold rolling；Decarburization；Soaking；Routinely carry out cooling, coating and finishing.The invention is guaranteeing magnetic property, i.e. P1.5/50
Under the premise of 50 >=1.68T of≤2.65w/kg, B, preferable mechanical performance is taken into account, i.e. the ratio between elongation and yield tensile ratio exists
0.37~0.43, while meeting high speed punching and the magnetic property requirements of manufacture frequency-changeable compressor iron core.The invention considers change
Frequency and its performance, but there is no specific targets to the performance under the conditions of low frequency operation, do not account for corrosion resistance yet.
In conclusion there is the preparation method of the non-orientation silicon steel of preferable low frequency performance and corrosion resisting property simultaneously at present not
It appears in the newspapers, for marine direct-driving type wind power generation machine other than requiring silicon steel material low frequency performance with higher, while also wanting
Preferable corrosion resistance is sought, because of the silicon steel material in the high perishable generator of the salt content of marine seawater, need one kind
Low frequency performance and the good non-orientation silicon steel of corrosion resistance meet the requirement of marine direct-driving type wind power generation machine.
Summary of the invention
To solve the above-mentioned problems, it is preferable for having in direct-driving type wind power generation machine that the object of the present invention is to provide one kind
The preparation method of low frequency performance and the non-orientation silicon steel of corrosion resisting property.
To achieve the above object, the preparation side of the non-orientation silicon steel for direct-driving type wind power generation machine designed by the present invention
Method includes smelting and being casting continuously to form base, hot rolling, normalizing, pickling and cold-rolling, alkali cleaning continuous annealing process, it is characterised in that: the smelting
In process, the chemical component and its weight percent that the molten steel of non-orientation silicon steel contains are C :≤0.0030%, Si:1.85~
2.24%, Mn:0.15~0.22%, P≤0.030%, S≤0.0030%, Al:0.25~0.38%, N≤0.0025%, Cr
≤ 0.12% and/or Cu≤0.12%, Sn≤0.11% and/or Sb≤0.055%, remaining is Fe and inevitable impurity；
To meet simultaneously: Si+Al+Mn+Cr+Cu+Sn+Sb is 2.5~3.0%；Sn+Sb be 0.05~0.16%, S+N≤
0.0055%, and (Sn+Sb)/(S+N) is 10~30.
Compared with prior art, the present invention first carries out the range of each ingredient of the molten steel of non-orientation silicon steel and each ingredient
Adjustment, the chemical Composition Control of molten steel are primarily referred to as the main alloy elements such as carbon in steel, silicon, manganese, phosphorus, sulphur and chromium, copper, tin and antimony
Etc. the control of quenched element.The range of each ingredient of the molten steel of non-orientation silicon steel in the present invention and each ingredient is carried out below detailed
Explanation.
The content of C is controlled≤0.0030% in steel-making, can remove the decarburization in subsequent annealing operation from, avoid finished product by C
Magnetic aging occurs.
Si can increase resistance but can reduce saturation magnetic induction (Bs).As Si<1.85%, iron loss can increase, but Si>
2.24%, then flux density can reduce.To take into account finished product magnetic property, the content of Si should be controlled in 1.85~2.24% ranges.
Mn can control the illeffects of S, be conducive to obtain coarse MnS.As Mn < 0.15%, to improvement rolling performance
Unfavorable, but Mn > 0.22%, the advantageous effect is unobvious, and increases cost, therefore, the content of Mn should control 0.15~
0.22%.
P is residual elements, so content control is ≤0.030%.
Al can increase resistance and crystal grain is promoted to grow up.General additional amount is 0.25~0.50% but this additional amount
Will form, as Al≤0.03%, can substantially reduce shape through a large amount of experimental study to magnetic unfavorable AlN and internal oxidation layer
Cost is also advantageously reduced at AlN and internal oxidation layer amount to improve magnetism.Therefore control Al≤0.03%.
Cr and Cu, adds one such or two kinds, and the effect of Cr and Cu in the present invention is to improve rustless property, total amount
It is controlled respectively≤0.12%.
Sn and Sb, addition is one such or a variety of, and Sn, Sb are easily to be conducive to inhibit in crystalline substance in crystal boundary segregation element
Boundary is formed to magnetic unfavorable (111) plane texture.Be not achieved lower than 0.05% improve texture effect, and be higher than 0.16% at
This raising, while surface quality is influenced, so control (Sn+Sb) total content is 0.05~0.16%.
S and N is that should reduce to the greatest extent to magnetic unfavorable element, thus control (S+N)≤0.0055%.
In order to give full play to the effect that Sn and Sb increases favorable texture, need to further decrease the content of S and N, therefore will
(Sn+Sb)/(S+N) control, if ratio is greater than 30, need to increase cost and have an adverse effect 10~30, and ratio is less than 10
Desired effect is then not achieved.
Preferably, the smelting procedure is smelted by clean steel mode, and detailed process is that low-sulfur is added into molten steel
The sulfur content of lime, low-sulfur steel scrap auxiliary material control molten steel, it is 0.6%~1.0% that the low-sulfur lime, which accounts for Metal Weight percentage,
It is 11%~20% that the low-sulfur steel scrap, which accounts for Metal Weight percentage,；Addition rare earth or Calcium treatment further purify steel, promote
Inclusion conditioning and the slagging that floats in molten steel, it is 0.08~0.13% that the rare earth, which accounts for weight of molten iron percentage, then controls oxygen
Compound field trash MnO+Al203+Si02Weight percentage < 15%, SiO of MnO in total amount2Content > 75%.
The purpose of inclusion removal is purification molten steel, and then improves the magnetic property of silicon steel.Floating of the field trash in molten steel
Point three phases carry out, from the formation of deoxidation type inclusion to slag interface is transferred to, finally in the effect of viscous force, interfacial tension
It is lower to enter slag, to achieve the purpose that removal.Low-sulfur lime, the control of low-sulfur steel scrap auxiliary material is added in the present invention first into molten steel
The sulfur content of molten steel adds rare earth element or Calcium treatment and further purifies steel, promote in molten steel inclusion conditioning and float at
Slag, finally by control oxide field trash MnO+Al203+Si02MnO and SiO in total amount2Content can increase finished product crystal grain
Size so that reduce iron loss.Because MnO fusing point is low, MnO content is high in oxide duplex impurity, in higher temperature hot rolling at
In fusing or semi-molten state, and along rolling to elongation, when annealing, can hinder crystal grain to grow up.If only individually controlling the content of MnO
The MnS distribution that will lead in steel is unstable, and tiny MnS quantity is most, it is therefore desirable to further control SiO2Content, because
It is MnS mostly with SiO2Coarse MnS is formed for core precipitation, slab is not easy to be dissolved when heating, the tiny MnS quantity being precipitated later
Few, finished product coarse grains, iron loss further decreases.
Preferably, the technological parameter of the hot-rolled process is that control time inside furnace is 3~4h, and tapping temperature is
1140~1180 DEG C；7 passage finish rolling are carried out after being depressed 8 passage roughing repeatedly greatly, control finishing temperature is 840~880 DEG C, volume
Take temperature not less than 720 DEG C, coils of hot-rolled steel is with a thickness of 2.0~2.5mm.
Compared with prior art, the present invention optimizes hot-rolled process further to promote the magnetism of non-orientation silicon steel
Energy.If time inside furnace<3h in hot-rolled process, steel billet temperature is uneven, the stability of influence of rolled, and time inside furnace>4h, can increase
Add the quantity of the second phase field trash such as MnS, CuS, AlN, it is unfavorable to magnetic property, therefore controlling time inside furnace is 3~4h.Furnace temperature out
<1140 DEG C of degree, will increase roll-force, causes template unqualified, and tapping temperature>1180 DEG C, then increase of consuming energy, therefore it is required that going out
Furnace temperature is 1140~1180 DEG C.It is unfavorable to magnetic property if finishing temperature<840 DEG C, and finishing temperature>880 DEG C, then it is higher
Tapping temperature, increase energy consumption, therefore it is required that finishing temperature be 840~880 DEG C.If coiling temperature is high, can make inside hot rolled coil
Buy back policy occurs in subsequent temperature-fall period and grows up for grain structure, and to improving, magnetic property is advantageous, therefore coiling temperature
It is required that being not less than 720 DEG C.
Preferably, the technological parameter of the normalizing process is that control heating rate is 24~30 DEG C/s, and normalizing is equal
915 DEG C~980 DEG C of hot temperature, 40~55s of soaking time and cooling velocity are 17~23 DEG C/s.
Normalizing treatment is that one of the common approach of raising magnetic property can waste more productions if heating rate < 24 DEG C/s
Energy；And heating rate > 30 DEG C/s, then increase equipment cost, therefore controlling heating rate is 24~30 DEG C/s.If normalizing soaking temperature
< 915 DEG C of degree and soaking time < 40s, are unfavorable for obtaining better magnetic property；And when normalizing soaking temperature > 980 DEG C and heat preservation
Between > 55s, and existing equipment will be transformed and increase the consumption of standby redundancy, therefore 915 DEG C~980 DEG C of normalizing soaking temperature, heat preservation
40~55s of time.If cooling velocity < 24 DEG C/s can waste more production capacities；And cooling velocity > 30 DEG C/s, then increase equipment at
This, therefore controlling cooling velocity is 17~23 DEG C/s.
Preferably, in the pickling and cold-rolling process, Cold Rolled Plate Thickness is 0.50 ± 0.010mm.
Cold rolling is to realize the committed step of high thickness and precision, the present invention control Cold Rolled Plate Thickness be 0.50 ± 0.010mm, one
Aspect is user to the high-precision requirement of finished product, is on the other hand the fluctuation in order to avoid generating magnetic property.
Preferably, in the finished product continuous annealing process, control finished products heating rate be 18~22 DEG C/
S, 910~955 DEG C of soaking temperature, 60~75s of soaking time and cooling velocity are 12~18 DEG C/s, and atmosphere is pure N2；Then empty
Cold and be coated with T4 coating, coating weight is 0.5~1.5g/m2。
Finished product continuous annealing is to realize magnetic property and the matched committed step of mechanical property, if heating rate < 18 DEG C/s, meeting
Reduce soaking soaking time；And heating rate > 22 DEG C/s, then the high requirements on the equipment, is unfavorable for steady running, therefore controls finished product
The heating rate of annealing is 18~22 DEG C/s.If soaking temperature < 910 DEG C and soaking time < 60s, are unfavorable for obtaining optimal
Grain structure；And soaking temperature > 955 DEG C and soaking time > 75s, the consumption for increasing standby redundancy is required, therefore, control is equal
910~955 DEG C of hot temperature, 60~75s of soaking time.If cooling velocity < 12 DEG C/s, it will cause more production capacity wastes；And it is cold
But speed > 18 DEG C/s then increases equipment cost, and therefore, cooling velocity is 12~18 DEG C/s.If coating weight < 0.5g/m2, to table
Face insulation is unfavorable；And coating weight > 1.5g/m2.Then influence the weldability and punching of steel plate, therefore, control coating weight be 0.5~
1.5g/m2。
The present invention has the advantages that compared with prior art, the present invention is in smelting procedure to the molten steel of non-orientation silicon steel
The range of each ingredient and each ingredient is adjusted, and is reduced the iron loss of non-orientation silicon steel, improves magnetic property and is improved corrosion resistance
Can, that is, improve the low frequency performance and corrosion resisting property of non-orientation silicon steel.By inclusion removal process, the degree of purity of molten steel is improved,
The both less than pure molten steel of 20ppm of C, S, N, 0 is obtained, the magnetic property of non-orientation silicon steel is further increased.The present invention passes through improvement
Production technology further decreases the influence that field trash reduces the magnetic property and mechanical property of non-orientation silicon steel.
Detailed description of the invention
Fig. 1 is the salt fog effect picture of embodiment 5；
Fig. 2 is the salt fog effect picture of comparative example 3.
Specific embodiment
For a better understanding of the invention, invention is described in detail below with reference to specific example.
The requirement that direct-driving type wind power generation machine can be met there are low-frequency magnetic to solve existing non-orientation silicon steel is asked
Topic, the present invention provide a kind of preparation method of non-orientation silicon steel, and the present invention passes through to chemical composition ranges in molten steel and steel
The regulation of cleanliness and each process technique is to realize the low frequency performance of non-orientation silicon steel and the raising of corrosion resisting property.Specifically
It says, chemical component is optimized by adding Sn, Sb, Cr and Cu；By strict control it is oxide-based be mingled with improve steel
Cleanliness；End properties tune is realized by smelting, hot rolling, normalizing and cold rolling and the adjustment of finished product continuous annealing process parameter
Control；It will be used for the preparation method of the non-orientation silicon steel of direct-driving type wind power generation machine to the present invention by specific embodiment below
Preferred embodiment be described in detail.
Embodiment 1~12
Non-orientation silicon steel in embodiment 1~12 is fabricated as follows:
1) smelt and be casting continuously to form base: the chemical component and its weight percent that the molten steel of non-orientation silicon steel contains are C :≤
0.0030%, Si:1.85~2.24%, Mn:0.15~0.22%, P≤0.030%, S≤0.0030%, Al:0.25~
0.38%, N≤0.0025%, Cr≤0.12% and/or Cu≤0.12%, Sn≤0.11% and/or Sb≤0.055%, remaining
For Fe and inevitable impurity；To meet simultaneously: Si+Al+Mn+Cr+Cu+Sn+Sb is 2.5~3.0%；Sn+Sb is 0.05
~0.16%, S+N≤0.0055%, and (Sn+Sb)/(S+N) is 10~30.Smelting procedure is smelted by clean steel mode, tool
Body process is that the sulfur content of low-sulfur lime, low-sulfur steel scrap auxiliary material control molten steel is added into molten steel, and the low-sulfur lime accounts for molten steel
Weight percent is 0.6%~1.0%, and it is 11%~20% that the low-sulfur steel scrap, which accounts for Metal Weight percentage,；Add rare earth or
Calcium carries out steel purification processing to molten steel, promotes inclusion conditioning and the slagging that floats in molten steel, and the rare earth accounts for weight of molten iron hundred
Divide than being 0.08~0.13%, then control oxide field trash MnO+Al203+Si02The weight percentage of MnO in total amount <
15%, SiO2Content > 75%.
2) hot rolling: control time inside furnace is 3~4h, and tapping temperature is 1140~1180 DEG C.It is thick that 8 passages repeatedly are depressed greatly
Carry out 7 passage finish rolling after rolling, control finishing temperature is 840~880 DEG C, and coiling temperature is not less than 720 DEG C, coils of hot-rolled steel with a thickness of
2.0~2.5mm.
3) normalizing: control heating rate be 24~30 DEG C/s, 915 DEG C~980 DEG C of normalizing soaking temperature, soaking time 40~
55s and cooling velocity are 17~23 DEG C/s.
4) pickling and cold-rolling: normalizing plate carries out 4 passage cold rollings after pickling, and control Cold Rolled Plate Thickness is 0.50 ± 0.010mm.
5) alkali cleaning continuous annealing: cold-reduced sheet carries out continuous annealing after alkali cleaning.Because the C content in chemical component is lower than
30ppm no longer needs to carry out decarburizing annealing.The heating rate for controlling finished products is 18~22 DEG C/s, soaking temperature 910~955
DEG C, 60~75s of soaking time and cooling velocity are 12~18 DEG C/s, and atmosphere is pure N2, it is then air-cooled and be coated with T4 coating, it is coated with
Amount is 0.5~1.5g/m2。
The preparation method of comparative example I~V and preparation section process of the invention are essentially identical, and difference is No yield point silicon
The chemical component of the molten steel of steel is different, and technological parameter is different in process and comparative example I~V does not carry out inclusion removal process.
The specific steps of comparative example that details are not described herein I~V.
The ladle chemistry of non-orientation silicon steel and its weight percent are shown in embodiment 1~12 and comparative example I~V
Table 1；
Process parameter table is shown in non-orientation silicon steel preparation method smelting procedure in embodiment 1~12 and comparative example I~V
Table 2；
Non-orientation silicon steel preparation method main technologic parameters list 3, table 4 in embodiment 1~12 and comparative example I~V；
The non-orientation silicon steel performance detection and effect assessment that embodiment 1~12 and comparative example I~V obtain are shown in Table 5；
Table 1
Total alloy is the weight percentage of Si+Al+Mn+Cr+Cu+Sn+Sb in table 1, and I~V is comparative example, comparative example
I: S+N goes beyond the scope；Comparative example II: Sn+Sb is lower than 0.05%；Comparative example III: Sn+Sb is higher than 0.16%；Comparative example IV: sum total
Gold is less than 2.5%；Comparative example V: total alloy is higher than 3.0%.
Table 2
In table 4, (MnO+Al203+Si02) in total amount the percentage of MnO content be from continuous casting billet sampling using chemical-electrical
The analysis of solution method obtains.
Table 3
Table 4
Table 5
In table 5, salt business experimental basis: GB/T 10125-2012 experimental condition: salt fog cabinet test room temperature: 35 DEG C；Pressure
Barrel temperature: 47 DEG C；NaCl concentration: 5.5%；PH value: 6.0.
In conjunction with table 5 and Fig. 1~2 as can be seen that the not only good antirust property but also low frequency performance is excellent of embodiment 1~12,
Low frequency performance (P can be met1.5/10≤ 0.60w/kg, B5000>=1.730T) and rustless property requirement (corrosion ratio is less than 70%),
And comparative example I~V cannot reach target call.Comparative example I: rustless property is not up to standard, and (corrosion ratio is 72% > 70%, low
Below standard (the P of frequency performance1.5/10=0.65 > 0.60w/kg, B5000=1.711 < 1.730T)；Comparative example II: rustless property is below standard
(corrosion ratio is 75% > 70%) and the below standard (P of low frequency performance1.5/10=0.51 < 0.60w/kg, B5000=1.725 <
1.730T)；Comparative example III: rustless property below standard (corrosion is than 81% > 70%) and the below standard (P of low frequency performance1.5/10=0.61 >
0.60w/kg, B5000=1.733 > 1.730T)；Comparative example IV: rustless property below standard (corrosion ratio 72% > 70%) and low frequency
It can below standard (P1.5/10=0.62 > 0.60w/kg, B5000=1.742 > 1.730T)；Comparative example V: the below standard (corrosion of rust-preventing characteristic
Ratio is 75% > 70%), the below standard (P of low frequency performance1.5/10=0.38 < 0.60w/kg, B5000=1.712 < 1.730T).
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (6)
1. a kind of preparation method of the non-orientation silicon steel for direct-driving type wind power generation machine, including smelt and be casting continuously to form base, hot rolling,
Normalizing, pickling and cold-rolling, alkali cleaning continuous annealing process, it is characterised in that: in the smelting procedure, the molten steel of non-orientation silicon steel contains
Chemical component and its weight percent be C :≤0.0030%, Si:1.85~2.24%, Mn:0.15~0.22%, P≤
0.030%, S≤0.0030%, Al:0.25~0.38%, N≤0.0025%, Cr≤0.12% and/or Cu≤0.12%, Sn
≤ 0.11% and/or Sb≤0.055%, while to meet: Si+Al+Mn+Cr+Cu+Sn+Sb is 2.5~3.0%；Sn+Sb is
0.05~0.16%, S+N≤0.0055%, and (Sn+Sb)/(S+N) be 10~30, remaining for Fe and inevitably it is miscellaneous
Matter.
2. the preparation method of the non-orientation silicon steel according to claim 1 for direct-driving type wind power generation machine, feature exist
In: smelting procedure is smelted by clean steel mode, and detailed process is that low-sulfur lime, the control of low-sulfur steel scrap auxiliary material are added into molten steel
The sulfur content of molten steel, it is 0.6%~1.0% that the low-sulfur lime, which accounts for Metal Weight percentage, and the low-sulfur steel scrap accounts for molten steel weight
Measuring percentage is 11%~20%；Addition rare earth or Calcium treatment further purify steel, promote in molten steel inclusion conditioning and on
Floating slagging, it is 0.08~0.13% that the rare earth, which accounts for weight of molten iron percentage, then control oxide field trash MnO+Al203+
Si02Weight percentage < 15%, SiO of MnO in total amount2Content > 75%.
3. the preparation method of the non-orientation silicon steel according to claim 1 for direct-driving type wind power generation machine, feature exist
In: the technological parameter of the hot-rolled process is that control time inside furnace is 3~4h, and tapping temperature is 1140~1180 DEG C；It is pressed greatly
Under 7 passage finish rolling are carried out after 8 passage roughing repeatedly, control finishing temperature is 840~880 DEG C, and coiling temperature is not less than 720 DEG C,
Coils of hot-rolled steel is with a thickness of 2.0~2.5mm.
4. the preparation method of the non-orientation silicon steel according to claim 1 for direct-driving type wind power generation machine, feature exist
In: the technological parameter of the normalizing process is that control heating rate is 24~30 DEG C/s, normalizing soaking temperature 915 DEG C~980
DEG C, 40~55s of soaking time and cooling velocity are 17~23 DEG C/s.
5. the preparation method of the non-orientation silicon steel according to claim 1 for direct-driving type wind power generation machine, feature exist
In: in the pickling and cold-rolling process, Cold Rolled Plate Thickness is 0.50 ± 0.010mm.
6. the preparation method of the non-orientation silicon steel according to claim 1 for direct-driving type wind power generation machine, feature exist
In: in the finished product continuous annealing process, the heating rate for controlling finished products is 18~22 DEG C/s, soaking temperature 910~955
DEG C, 60~75s of soaking time and cooling velocity are 12~18 DEG C/s, and atmosphere is pure N2；Then air-cooled and be coated with T4 coating, it is coated with
Amount is 0.5~1.5g/m2。
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| 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 |
| 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 |
| CN112522631A (en) * | 2020-11-13 | 2021-03-19 | 江苏联峰能源装备有限公司 | Steel for wind power and preparation method thereof |
| CN115135788A (en) * | 2020-02-20 | 2022-09-30 | 日本制铁株式会社 | Hot-rolled steel sheet for non-oriented electrical steel sheet, and method for producing same |
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