CN1100157C - Series electrical steel used for high efficiency motor iron core - Google Patents
Series electrical steel used for high efficiency motor iron core Download PDFInfo
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- CN1100157C CN1100157C CN00115993A CN00115993A CN1100157C CN 1100157 C CN1100157 C CN 1100157C CN 00115993 A CN00115993 A CN 00115993A CN 00115993 A CN00115993 A CN 00115993A CN 1100157 C CN1100157 C CN 1100157C
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- electrical steel
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- motor iron
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Abstract
The present invention relates to series electrical steel for efficient motor iron cores, particularly to a superhigh magnetic induction low iron loss cold rolling non-oriented series electrical steel component and a production method thereof. Element content of master alloy is adjusted to lower the gas inclusion, segregation elements are added, methods of low temperature hot rolling, primary cold rolling, and dry gas or humidified atmosphere finished goods annealing is adopted, P1.5 of 0.50mm products is from 2.30 to 10.00 w/kg, B5000 is from 1.73 to 1.82T, and the P1.5 and the B5000 are respectively 0.10T higher than those of corresponding brands of common cold rolling non-oriented silicon steel. The electrical steel of the present invention can be used for various efficient motor iron cores, and can be used for common motor iron cores. The motor efficiency can be enhanced, the operation indexes can be improved, and the purposes of energy saving and loss reduction are realized.
Description
The present invention relates to a kind of series electrical steel used for high efficiency motor iron core, specifically be exactly iron loss P1.5 with existing each rank of common cold rolling non-orientation silicon steel quite, magnetic strength B5000 than more than the high respectively 0.10T of each corresponding trade mark, have the composition and a production method of the low-iron-loss cold-rolled orientation free series electrical steel of high magnetic strength.
Before the present invention, a large amount of common non orientating silicon steel Si, the Al content height that use in market, and the high trade mark also adopts twice cold rolling, twice annealing method production, finished product very easily produces the top layer oxidation, cost height not only, also can't realize high magnetic strength, be difficult to satisfy the requirement that electronic product constantly develops towards miniaturization, high precision int and high efficiency direction.Commercial in recent years high-magnetic strength non-oriented electrical steel, have Kawasaki, Japan system iron Takashima Co., Ltd. harvest etc. 1997 " Materia Japan " the 36th curly hair table pass through add the size of Al and rare earth element, change inclusion and distribute, control the recrystal grain diameter, the 50RMA350 electrical steel of developing, its Chinese mugwort this smooth test piece of servant P after 750 ℃ * 2h stress relieving
1.5=3.12W/kg, B
5000=1.75T; The same year Japan wrap up in that clear grade delivers Fushan investigation of materials center day on " NKK technology " with Si, Al be main component, reduce inclusion content, optimizing cold rolling before tissue to control recrystallization texture, full technological electrical steel product NKBF1～3 of developing, its P
1.5Be respectively 5.50,4.70,3.50W/kg, B
5000Be respectively 1.80,1.77,1.75T, semi-technological electrical steel product NKBS1～3 are P after annealing in 750 ℃ * 2 hours
1.5Be respectively 4.10,3.40,3.00W/kg, B
5000Be respectively 1.79,1.77,1.75T.Above-mentioned materials has higher magnetic strength, and weak point is that they do not form series, and low trade mark rank in all belonging to, and can not satisfy and make all kinds of high efficiency motor iron core requirements.
The composition and the production method that the purpose of this invention is to provide a kind of series electrical steel used for high efficiency motor iron core are produced the high magnetic strength non-oriented electrical steel of the basic, normal, high serial trade mark, make 0.50mm finished product iron loss P
1.5In 2.30～10.00W/kg scope, and magnetic strength B
5000Up to 1.73～1.82 T, suit to make all kinds high efficiency electric iron core, satisfy motor product and raise the efficiency, improve integrated operation index and energy-saving and cost-reducing requirement.
In order to reach purpose of the present invention, designed a kind of series electrical steel used for high efficiency motor iron core, the strand chemical ingredients (% meter by weight) that it is characterized in that steel is: C≤0.008, Si 0.20～2.50, the residual amount of Mn 0.15～0.80, Als～1.50, the residual amount of B～0.0035, P+Sn/Sb 0.08～0.45, S≤0.0030, N≤0.0030, surplus are Fe and inevitably are mingled with.For reaching best effect of the present invention, optimum range＜0.0020% of optimum range＜0.0030% of C, N, P+Sn/Sb content are 0.08～45% must be compound interpolation in the strand chemical ingredients of the present invention.
The principle of electrical steel composition design of the present invention is as follows:
C: harmful to magnetic, intermittently can pass precipitation under the C normal temperature in α-Fe in time and separate out and cause magnetic aging.If the C too high levels is used for decarburization time and prolongs and reduce unit throughput, raising humidification water temperature then increases oxidation and degradation performance in the finished product steel plate top layer, C of the present invention≤0.008%, optimum range C＜0.0030%.
Si: can be dissolved in ferrite and form substitutional solid solution, improve matrix resistivity, reduce iron loss, but worsen magnetic strength, when Si content reached certain level, its content continued to increase, and reduced the iron loss effect and obviously weakened.Si was 0.20～2.50% among the present invention, less than 0.20% o'clock P
1.5Can not drop to below the 10.00W/kg, greater than 2.50% o'clock B
5000Be difficult to reach high magnetic strength requirement, and processing difficulties is arranged.
Mn: can form stable MnS with inevitable inclusion S, eliminate S magnetic is endangered, also can prevent hot-shortly, it also is dissolved in ferrite and forms displaced type sosoloid, and the effect that reduces iron loss is arranged.Mn is 0.15～0.80% among the present invention, and it is not obvious to be lower than 0.15% advantageous effect, is higher than at 0.80% o'clock, Ac
1Temperature reduces, and recrystallization temperature is low, and α → γ phase transformation easily takes place in thermal treatment, destroys recrystallization texture.
Al: dissolve in ferrite and improve matrix resistivity, coarsened grain, reduction iron loss, littler to magnetic strength deterioration effect than Si, simultaneously all right deoxidation, fixed nitrogen, but very easily cause oxidation in the finished product steel plate top layer.The Als scope is residual amount～1.50% among the present invention.Als surpasses 1.50% o'clock B
5000Do not reach high magnetic strength requirement, and processing difficulties is arranged, when requiring B
5000During 〉=1.76T, Als is residual amount in the steel.
B: itself is to not contribution of magnetic, and only the fixing inevitable gas of conduct is mingled with N and adds.B adding scope is residual amount～0.0035% among the present invention, surpasses to constitute the new deterioration magnetic that is mingled with at 0.0035% o'clock, and when N in the strand＜0.0020%, B is generally residual amount.
P, Sn/Sb: all be to significantly improve matrix resistivity element, and the effect of P is also stronger than Si, P, Sn/Sb also are the positive segregation element simultaneously, can promote recrystallize, increase favorable texture, wherein Sn, Sb are again activating elements, its on the top layer or top layer crystal boundary place poly-partially, can reduce oxidation in the top layer, prevent that active oxygen from permeating to base steel along crystal boundary, very favourable to improving magnetic.Regulation P of the present invention, Sn/Sb are compound interpolation, and compound addition is P+Sn/Sb 0.08～0.45%.Processing difficulties will take place less than 0.08% DeGrain greater than 0.45% in P+Sn/Sb; Sb have obvious inhibition C by matrix to the surface diffusion effect, the carrying out that is unfavorable for taking off C, the alternative Sn of Sb, when with Sb during for Sn, must control strand C＜0.0030%.
S: all harmful to processibility and magnetic, itself and Mn form tiny MnS particle, hinder the finished products grain growth, and severe exacerbation magnetic forms low melting point FeS and FeS with Fe
2Or eutectic, easily cause hot-work fragility.The present invention stipulates S≤0.0030%.
N: easily form small and dispersed nitride such as AlN, can hinder recrystallize in the finished products process and recrystal grain is grown up, under the room temperature among α-Fe separating out of N to cause magnetic aging, severe exacerbation magnetic.The present invention requires N≤0.0030%, optimum range N＜0.0020%.
In order to reach purpose of the present invention, the present invention has also designed a kind of production method of series electrical steel used for high efficiency motor iron core, smelt by common non-oriented electrical steel method, obtaining chemical ingredients (% meter by weight) is: C≤0.008, Si 0.20～2.50, Mn 0.15～0.80, the residual amount of Als～1.50, the residual amount of B～0.0035, P+Sn/Sb0.08～0.45, S≤0.0030, N≤0.0030, surplus is that Fe reaches the strand that inevitably is mingled with, it is characterized in that strand is rolling through≤1150 ℃ of soaking, be cold rolled to finished product thickness with once-through method after the pickling, cold-rolled steel strip carries out finished product recrystallization annealing or the recrystallization annealing of decarburization finished product under 820～1050 ℃ of temperature, annealing atmosphere dry gas when C＜0.0030%, annealing atmosphere room temperature～60 ℃ humidification when C is 0.0030～0.008%, H in the annealing atmosphere
2/ N
2Throughput ratio is 0.34～3.0.
The present invention be the sulfide that prevents as cast condition, nitride in the hot rolling soaking and the operation of rolling again solid solution and disperse separate out, require hot rolling soaking temperature≤1150 ℃.Hot rolled strip implements to roll back slow cooling or anneal has further promotion inclusion to separate out alligatoring, evenly hot-rolled sheet tissue, raising finished product magnetic and prevent the effect of corrugated defective, and the present invention does not do special stipulation, looks necessity and carries out.Steel band is cold rolled to finished product thickness through pickling with once-through method, is beneficial to improve magnetic strength.
Cold-rolled steel strip finished product of the present invention recrystallization annealing or decarburization finished product recrystallization annealing temperature are 820～1050 ℃, it is slow to be lower than 820 ℃ of recrystallize speed, and the recrystallize imperfection is higher than 1050 ℃, α-γ phase transformation will take place in the part steel band, destroys recrystallize and recrystallized structure.When C＜0.0030%, the annealing atmosphere dry gas can guarantee that the finished product steel belt carbon content reaches no magnetic aging state; When C is 0.0030～0.008%, annealing atmosphere room temperature～60 ℃ humidification, the humidification temperature is lower than room temperature can not drop to C no magnetic aging level, is higher than 60 ℃ and easily produces oxidation in the top layers; H in the annealing atmosphere
2/ N
2Throughput ratio is 0.34～3.0, and ratio is lower than the lower limit steel plate and easily forms interior nitride layer, and it is uneconomical to be higher than the upper limit.
Series electrical steel used for high efficiency motor iron core of the present invention has following tangible advantage: 1. series electrical steel composition simplicity of design of the present invention, and process combination is also simple, and stable performance is easy to implement.2. series electrical steel iron loss P of the present invention
1.5In 2.30～10.00W/kg scope, magnetic strength B
5000Reach 1.73～1.82T, compare P with each corresponding trade mark of existing common cold rolling non-orientation silicon steel
1.5Quite, B
5000Then respectively than more than the high 0.10T of the corresponding trade mark.3. series electrical steel of the present invention is the most suitable makes all kinds of high efficiency motor iron cores, also can be used as the common electric machine iron core, compare with the electric machine iron core of making of common cold rolling non-orientation silicon steel, can make motor reduced volume, weight reduction, raise the efficiency, improve the integrated operation index, save copper loss, iron loss and energy consumption.
The present invention further is illustrated with embodiment:
Embodiment 1: smelt the basic, normal, high serial grade electric steel of the present invention respectively with converter or vacuum induction furnace, strand is rolled into the thick steel band of 1.9～2.2mm through cogging, hot rolled strip is through slow cooling or annealing or unannealed processing, be cold rolled to finished product thickness 0.50mm with once-through method after the pickling, to finished product, composition sees Table 1 to cold-rolled steel strip through recrystallization annealing or decarburization recrystallization annealing.
Table 1
| Sequence number | Composition (%) | |||||||
| C | Si | Mn | Als | B | P+Sn/Sb | S | N | |
| 1 | 0.0021 | 0.29 | 0.72 | Residual amount | 0.0030 | 0.31 | 0.0025 | 0.0025 |
| 2 | 0.0027 | 0.35 | 0.69 | Residual amount | Residual amount | 0.30 | 0.0023 | 0.0015 |
| 3 | 0.0053 | 0.57 | 0.68 | Residual amount | 0.0029 | 0.29 | 0.0021 | 0.0027 |
| 4 | 0.0037 | 0.65 | 0.70 | Residual amount | 0.0033 | 0.25 | 0.0020 | 0.0027 |
| 5 | 0.0024 | 1.19 | 0.74 | Residual amount | Residual amount | 0.22 | 0.0023 | 0.0016 |
| 6 | 0.0040 | 1.36 | 0.68 | Residual amount | 0.0029 | 0.18 | 0.0015 | 0.0028 |
| 7 | 0.0028 | 1.84 | 0.29 | 0.35 | Residual amount | 0.20 | 0.0020 | 0.0019 |
| 8 | 0.0037 | 1.97 | 0.31 | 0.59 | Residual amount | 0.21 | 0.0018 | 0.0018 |
| 9 | 0.0028 | 2.23 | 0.25 | 1.07 | Residual amount | 0.17 | 0.0019 | 0.0024 |
Table 2 adopts production method of the present invention and this smooth test piece magnetic of finished product Chinese mugwort servant for the chemical ingredients of (sequence number correspondence) steel in the table 1:
Table 2
| Sequence number | Technology | The iron loss rank | |||||||
| The hot rolling soaking temperature (℃) | Hot-rolled sheet annealing or slow cooling | Cold-rolling practice | The finished products temperature (℃) | The humidification water temperature (℃) | H 2/N 2(ratio) | P1.5 (W/Kg) | B 5000 (T) | ||
| 1 | 1150 | × | Once-through method | 840 | Dry gas | 0.34 | 6.08 | 1.79 | The low trade mark |
| 1150 | √ | 5.39 | 1.82 | ||||||
| 2 | 1150 | × | Once-through method | 860 | Dry gas | 0.34 | 5.35 | 1.80 | |
| 1150 | √ | 4.74 | 1.82 | ||||||
| 3 | 1100 | × | Once-through method | 840 | Room temperature | 0.34 | 4.62 | 1.79 | The middle trade mark |
| 1100 | √ | 4.32 | 1.81 | ||||||
| 4 | 1150 | × | Once-through method | 870 | Room temperature | 1.00 | 4.43 | 1.79 | |
| 1150 | √ | 4.19 | 1.81 | ||||||
| 5 | 1100 | × | Once-through method | 900 | Dry gas | 1.00 | 3.31 | 1.77 | The high trade mark |
| 1100 | √ | 3.18 | 1.80 | ||||||
| 6 | 1100 | × | Once-through method | 900 | Room temperature | 1.00 | 3.35 | 1.76 | |
| 1100 | √ | 3.16 | 1.79 | ||||||
| 7 | 1100 | × | Once-through method | 920 | Dry gas | 1.00 | 3.09 | 1.75 | |
| 1100 | √ | 2.97 | 1.77 | ||||||
| 8 | 1100 | × | Once-through method | 930 | Room temperature | 1.00 | 2.76 | 1.74 | |
| 1100 | √ | 2.61 | 1.76 | ||||||
| 9 | 1100 | × | Once-through method | 940 | Dry gas | 1.50 | 2.25 | 1.73 | |
| 1100 | √ | 2.19 | 1.75 | ||||||
As seen from Table 2, series electrical steel iron loss P of the present invention
1.5Cover the common non orientating silicon steel of the present high, medium and low trade mark, and magnetic strength B
5000Up to 1.73～1.82T, than with more than the high 0.10T of the common cold rolling non-orientation silicon steel of iron loss rank.
Embodiment 2: use the high magnetic strength non-oriented electrical steel finished product that the embodiment of the invention 1 produces and be made into all kinds of electric machine iron cores, compare with the ordinary silicon steel, it is energy-conservation, lower consumption, raise the efficiency effect sees Table 3.
Table 3
| Motor | Redesign | Copper loss W | No-load current A | Open circuit loss W | Iron loss W | Power factor (PF) | Efficient (%) | With iron quantitative changeization (%) | Copper consumption changes (%) | Efficiency change (%) | Core material |
| Common electric machine 450kw | × | 8405 | 11.25 | 9000 | Common silicon steel | ||||||
| 8431 | 11.00 | 9000 | |||||||||
| 6855 | 8.40 | 7200 | The present invention | ||||||||
| 5895 | 8.40 | 6240 | |||||||||
| Common electric machine 75kw | × | 1470 | 0.907 | 0.928 | Common silicon steel | ||||||
| 1360 | 0.906 | 0.930 | |||||||||
| 1200 | 0.918 | 0.936 | The present invention | ||||||||
| 1050 | 0.911 | 0.938 | |||||||||
| High efficiency motor 0.75-150kw | × | Original design level | Original design level | Original design level | Common silicon steel | ||||||
| √ | -13.02 ※ | +12.87 ※ | +3.014 ※ | The present invention |
※ is design level one original design level again
Can obviously find out from table 3, utmost point serial high-magnetic induction non-orieted electrical steel optimum of the present invention is made the series of high efficiency electric machine iron core, all kinds of common electric machine iron cores simultaneously also suit to do, compare with common non orientating silicon steel, can improve electrical efficiency, improve the integrated operation index, save material, cut down the consumption of energy.
Claims (3)
1. series electrical steel used for high efficiency motor iron core, the strand chemical ingredients (% meter by weight) that it is characterized in that steel is: C≤0.008, Si 0.20～2.50, the residual amount of Mn 0.15～0.80, Als～1.50, the residual amount of B～0.0035, P+Sn/Sb 0.08～0.45, S≤0.003, N≤0.0030, surplus are Fe and inevitably are mingled with.
2. a kind of series electrical steel used for high efficiency motor iron core according to claim 1 is characterized in that in the strand chemical ingredients of steel that P+Sn/Sb content is 0.08～0.45% must be compound interpolation.
3. the production method of a series electrical steel used for high efficiency motor iron core, smelt by common non-oriented electrical steel method, obtaining chemical ingredients (% meter by weight) is: C≤0.008, Si 0.20～2.50, Mn 0.15～0.80, the residual amount of Als～1.50, the residual amount of B～0.0035, P+Sn/Sb 0.08～0.45, S≤0.0030, N≤0.0030, surplus is that Fe reaches the strand that inevitably is mingled with, it is characterized in that strand is rolling through≤1150 ℃ of soaking, be cold rolled to finished product thickness with once-through method after the pickling, cold-rolled steel strip carries out finished product recrystallization annealing or the recrystallization annealing of decarburization finished product under 820～1050 ℃ of temperature, annealing atmosphere dry gas when C＜0.0030%, when C is 0.0030～0.008%, annealing atmosphere room temperature～60 ℃ humidification, H in the annealing atmosphere
2/ N
2Throughput ratio is 0.34～3.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00115993A CN1100157C (en) | 2000-08-31 | 2000-08-31 | Series electrical steel used for high efficiency motor iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00115993A CN1100157C (en) | 2000-08-31 | 2000-08-31 | Series electrical steel used for high efficiency motor iron core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1288070A CN1288070A (en) | 2001-03-21 |
| CN1100157C true CN1100157C (en) | 2003-01-29 |
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|---|---|---|---|
| CN00115993A Expired - Fee Related CN1100157C (en) | 2000-08-31 | 2000-08-31 | Series electrical steel used for high efficiency motor iron core |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050000596A1 (en) * | 2003-05-14 | 2005-01-06 | Ak Properties Inc. | Method for production of non-oriented electrical steel strip |
| CN101956127B (en) * | 2010-10-15 | 2012-05-30 | 马鞍山钢铁股份有限公司 | Manufacturing method of Sn contained non-oriented electrical steel and plate coil |
| CN102453844B (en) | 2010-10-25 | 2013-09-04 | 宝山钢铁股份有限公司 | Method for preparing non-oriented silicon steel with excellent magnetic property and high efficiency |
| CN102925793B (en) * | 2012-11-27 | 2014-12-10 | 武汉钢铁(集团)公司 | Non-oriented electrical steel with magnetic induction greater than or equal to 1.8 T and production method thereof |
| CN112746150A (en) * | 2020-12-24 | 2021-05-04 | 吉林大学 | Method for improving oxidation resistance of iron-based automobile part |
| 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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