CN104726794A - Non-oriented electrical steel sheets and method for manufacturing the same - Google Patents
Non-oriented electrical steel sheets and method for manufacturing the same Download PDFInfo
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Abstract
A non-oriented electrical steel sheet according to one embodiment of the present invention comprises, by weight, 2.0-3.5% of Si, 0.5-3.5% of Mn, 0.5-3.5% of Cr, more than 0% and less than 0.8% of Al, less than 0.004% of C, less than 0.004% of S, less than 0.004% of N, less than 0.004% of Ti, less than 0.004% of P, and Sn and Sb satisfying any composition range from the formula 1 to the formula 3, and the remainder is Fe and other unavoidably additive impurities, the formula 4 to the formula 6 being satisfied, 0.010%<=Sn<=0.080% ... formula 1;0.005%<=Sb<=0.050% ... formula 2; 0.01%<=[Sn]+[Sb]<=0.10% ... formula 3, wherein [Sn] and [Sb] are respectively weight% of Sn and Sb; 2.5%<=[Si]+[Al]<=3.5% ... formula 4; 1.2%<=[Cr]+[Mn]<=6.8% ... formula 5; and 4.1%<=[Si]+[Al]+([Mn]/2)+([Cr]/2)<=5.9% ... formula 6, wherein [Si], [Al], [Mn] and [Cr] are respectively weight% of Si, Al, Mn and Cr.
Description
Technical field
The present invention relates to a kind of non-oriented electromagnetic steel sheet and manufacture method thereof.
Background technology
Non-oriented electromagnetic steel sheet, as the important core material converted electrical energy in rotating machinery needed for mechanical energy, in order to save energy, importantly has its magnetic properties and low iron loss and high magneticflux-density.
At this, iron loss is in the switching process of energy, change the energy that heat disappears into, and therefore iron loss is lower more effective, and magneticflux-density is as the strength producing power, and it is higher more effective.
As the electrical sheet that drive-motor uses, in order to obtain good characteristic when high speed rotating, needing that there is good high-frequency iron loss, needing the intrinsic resistance rate of high electrical sheet for this reason, and needing suitably crystallization control particle diameter.
This is because when intrinsic resistance is lower, eddy losses can become large, thus electrical efficiency is sharply deteriorated, in high speed rotating is used, be difficult to application.
Therefore, intrinsic resistance range preferably from 60 ~ 80 μ Ω ㎝.
In the past, usually the alloying elements such as Si, Al and Mn were added to improve intrinsic resistance.
But the interpolation of these alloying elements can make material lighten, when Si cannot carry out cold rolling problem more than producing during 3.4wt%, and there is intrinsic resistance can not more than the problem of 60 μ Ω ㎝.
Therefore, in order to improve high-frequency iron loss, should impurity be reduced thus make magnetic region be easy to mobile, but when a large amount of use alloying element, the content due to impurity element uprises the problem that magnetic can be caused to be deteriorated.
Summary of the invention
One embodiment of the invention provide a kind of non-oriented electromagnetic steel sheet.
Another embodiment of the present invention provides a kind of manufacture method of non-oriented electromagnetic steel sheet.
The non-oriented electromagnetic steel sheet of one embodiment of the invention, in % by weight for, comprise Si:2.0 ~ 3.5%, Mn:0.5 ~ 3.5%, Cr:0.5 ~ 3.5%, Al: be greater than 0% and less than 0.8%, below C:0.004%, below S:0.004%, below N:0.004%, below Ti:0.004%, below P:0.004%, meet with Sn and Sb of following formula 1 to any one scope in the composition of formula 3, residual is Fe and other impurity unavoidably added
And following formula 4 can be met to formula 6,
0.010%≤Sn≤0.080% ... formula 1
0.005%≤Sb≤0.050% ... formula 2
0.01%≤[Sn]+[Sb]≤0.10% ... formula 3
(wherein, [Sn] and [Sb] is Sn and Sb % by weight.)
2.5%≤[Si]+[Al]≤3.5% ... formula 4
1.2%≤[Cr]+[Mn]≤6.8% ... formula 5
4.1%≤[Si]+[Al]+([Mn]/2)+([Cr]/2)≤5.9% ... formula 6
(wherein, [Si], [Al], [Mn] and [Cr] are Si, Al, Mn and Cr % by weight.)
In addition, comprise further: below Cu:0.025% and below Se:0.0080%, and described Se and Cu can meet [Se]+[0.5 × Cu]≤0.01% (wherein, [Se] and [Cu] be Se and Cu % by weight).
In addition, described electrical sheet can comprise below Mg:0.003%.
In addition, the Vickers' hardness (Hv) of described electrical sheet can be less than 220.
In addition, the intrinsic resistance value of described electrical sheet can be 60 ~ 80 μ Ω ㎝.
In addition, the size of the crystal grain in the micro organization of described electrical sheet can be 50 ~ 150 μm.
The manufacture method of the non-oriented electromagnetic steel sheet of one embodiment of the invention, comprises the following steps:
Slab is provided, described slab in % by weight for, comprise Si:2.0 ~ 3.5%, Mn:0.5 ~ 3.5%, Cr:0.5 ~ 3.5%, Al: be greater than 0% and less than 0.8%, below C:0.004%, below S:0.004%, below N:0.004%, below Ti:0.004%, below P:0.004%, to meet with Sn and Sb of following formula 1 to any one scope in the composition of formula 3, residual is Fe and other impurity unavoidably added;
After described slab is reheated with the temperature of 1100 DEG C ~ 1250 DEG C, be rolled and manufacture hot-rolled steel sheet; Described hot-rolled steel sheet is rolled and manufactures cold-rolled steel sheet; And final annealing is carried out to described cold-rolled steel sheet.
In addition, described slab can meet following formula 4 to formula 6,
0.010%≤Sn≤0.080% ... formula 1
0.005%≤Sb≤0.050% ... formula 2
0.01%≤[Sn]+[Sb]≤0.10% ... formula 3
(wherein, [Sn] and [Sb] is Sn and Sb % by weight.)
2.5%≤[Si]+[Al]≤3.5% ... formula 4
1.2%≤[Cr]+[Mn]≤6.8% ... formula 5
4.1%≤[Si]+[Al]+([Mn]/2)+([Cr]/2)≤5.9% ... formula 6
(wherein, [Si], [Al], [Mn] and [Cr] are Si, Al, Mn and Cr % by weight.)
In described hot-rolled step, the final rolling of hot rolling can be carried out under the temperature more than 800 DEG C.
The step of described hot-rolled steel sheet being carried out at the temperature of 850 ~ 1150 DEG C to hot-rolled sheet annealing can be comprised further.
Described final annealing temperature can be 750 ~ 1050 DEG C.
The invention provides a kind of non-oriented electromagnetic steel sheet, this non-oriented electromagnetic steel sheet suitably controls the content of Si, Mn, Al, Cr, Se, Cu, Sn or Sb in the alloying element added in steel, thus significantly improves magnetic properties.
Embodiment
Embodiment with reference to detailed description below can be expressly understood the method for both advantage and disadvantage of the present invention and realization.But the present invention is not limited to following public embodiment, by different implemented in many forms, the present embodiment is just in order to intactly openly the present invention, and in order to intactly inform that category of the present invention provides to those skilled in the art, the present invention is only defined by the category of claim.Reference numeral identical in whole specification sheets represents identical textural element.
The non-oriented electromagnetic steel sheet of one embodiment of the invention, in % by weight for, comprise Si:2.0 ~ 3.5%, Mn:0.5 ~ 3.5%, Cr:0.5 ~ 3.5%, Al: be greater than 0% and less than 0.8%, below C:0.004%, below S:0.004%, below N:0.004%, below Ti:0.004%, below P:0.004%, meet with Sn and Sb of following formula 1 to any one scope in the composition of formula 3, residual is Fe and other impurity unavoidably added
And following formula 4 can be met to formula 6,
0.010%≤Sn≤0.080% ... formula 1
0.005%≤Sb≤0.050% ... formula 2
0.01%≤[Sn]+[Sb]≤0.10% ... formula 3
(wherein, [Sn] and [Sb] is Sn and Sb % by weight.)
2.5%≤[Si]+[Al]≤3.5% ... formula 4
1.2%≤[Cr]+[Mn]≤6.8% ... formula 5
4.1%≤[Si]+[Al]+([Mn]/2)+([Cr]/2)≤5.9% ... formula 6
(wherein, [Si], [Al], [Mn] and [Cr] are Si, Al, Mn and Cr % by weight.)
In addition, can comprise further: below Cu:0.025% and below Se:0.0080%, and described Se, Cu can meet [Se]+[0.5 × Cu]≤0.01% (wherein, [Se] and [Cu] be Se and Cu % by weight).
Described electrical sheet can comprise below Mg:0.003%.
Below, the reason of the interpolation ratio that restriction is formed between the scope of component element of the present invention and component element is described.
[Si:2.0 ~ 3.5 % by weight]
Si plays the ratio resistance that improves material and reduces the effect of iron loss.When addition lower than 2.0% time, the improvement effect of high-frequency iron loss is not enough, and when addition is more than 3.5%, the hardness of material can rise, thus causes productivity and punching performance to be deteriorated.In more detail, can be 2.8 ~ 3.3%.
[Al:0.8 less than % by weight]
Al plays the ratio resistance that improves material and reduces the effect of iron loss.
When Al is more than 0.8%, the physical property of its mould can be changed when casting continuously and be difficult to cast continuously, therefore significantly can reduce productivity.In addition, can surface oxidation be promoted when annealing, and be combined with Cr and generate precipitate, thus cause magnetic to be deteriorated.
[Mn:0.5 ~ 3.5 % by weight]
Mn plays the ratio resistance of raising material and improves iron loss, and forms the effect of sulfide.
When addition is less than 0.5%, there is no the improvement effect of high-frequency iron loss, when addition is more than 3.5%, encourages and the formation of tissue is gathered to magnetic disadvantageous [111] and sharply reduces magneticflux-density.In more detail, can be 1.5 ~ 2.5%.
[Cr:0.5 ~ 3.5 % by weight]
Cr plays the ratio resistance of raising material and prevents the effect that material hardness rises while improving iron loss.
In order to ensure that high-frequency iron loss needs interpolation more than 0.5%, when addition is more than 3.5%, encourage to magnetic disadvantageous set tissue growth and sharply reduce magneticflux-density.In more detail, can be 1.5% ~ 3.5%.
[Cu:0.025 less than % by weight]
The S of Cu in steel is combined and manufactures sulfide, or forms fine disperse phase separately, or is combined with Se and forms fine precipitate, thus reduces the growth of crystal grain, so can be less than 0.025%.In more detail, can be less than 0.006%.
[Se:0.0080 less than % by weight]
The Cu of Se in steel is combined and forms Cu
2se, Cu
3se
2, CuSe and CuSe
2, and contain the growth of crystal grain, therefore can add less than 0.0080%.When addition is more than more than 0.0080%, the amount of nano-precipitation can sharply increase, thus causes magnetic to be deteriorated.In more detail, can be less than 0.007%.
[Sn and Sb]
On the surface that Sn and Sb can be segregated in steel plate and grain boundary, thus play surface oxidation when being contained in annealing, and improve the effect of set tissue.
In the present invention, Sn and Sb can individually add, and also can mix and add these two kinds of elements.
When adding separately Sn, this addition can be 0.01 ~ 0.08%.In more detail, can be 0.01 ~ 0.03%.
When addition is less than 0.01%, do not have effect, when addition is more than 0.08%, can be segregated on grain boundary and reduces toughness, thus relative magnetism improves reduction productivity.
In addition, when adding separately Sb, addition can be 0.005 ~ 0.05%.In more detail, can be 0.005 ~ 0.03%.When addition lower than 0.005% time, do not have effect, when addition is more than 0.05%, can be segregated on grain boundary and reduces toughness, thus relative magnetism improve reduce productivity.
In addition, when mix add Sn and Sb time, be preferably 0.01%≤[Sn]+[Sb]≤0.10% (wherein, [Sn] and [Sb] be Sn and Sb % by weight).
When Sn and Sb total amount lower than 0.01% time, do not have additive effect, when addition is more than 0.1%, the mark of inclusion can increase, thus causes magnetic to be deteriorated.
Other can comprise C, S, N, Ti and P.
C produces magnetic aging, is therefore preferably restricted to less than 0.004%, is preferably restricted to less than 0.003% further.
S and N forms sulfide and nitride respectively and reduces the growth of crystal grain, is therefore preferably restricted to less than 0.004%, is preferably restricted to less than 0.003% further.
Ti to promote in non-oriented electromagnetic steel sheet and the undesirable crystalline orientation i.e. growth of [111] set tissue, is therefore preferably restricted to less than 0.004%, is preferably restricted to less than 0.003% further.
When the alloying element of Si, Al, Mn and Cr etc. is more, P segregation can reduce toughness on grain boundary, thus causes productivity and punching performance to be deteriorated, so preferably controlling is less than 0.02%.
Mg and Sn or Sb combines and manufactures Mg
3sb
2and Mg
2sn, to form fine disperse phase.In the present invention, in steel, more there is not Mg then more favourable to magnetic, but consider the amount inevitably flowed in manufacturing process, be preferably less than 0.0030%.More preferably less than 0.0008%.When more than 0.030%, in steel, form the Mg that diameter is 5 ~ 15nm
3sb
2or Mg
2the disperse phase of Sn, can cause magnetic to be deteriorated.
In addition, Se and Cu can be [Se]+[0.5 × Cu]≤0.01%.Can be less than 0.009% in more detail (wherein, [Se] and [Cu] be Se and Cu % by weight).
To containment Se-Cu compound, described scope is the most effective and the growth of crystal grain is the most excellent.Under the scope of Se+0.5Cu>0.01%, the Cu that diameter is about 20 ~ 60nm can be formed
2se, Cu
3se
2, CuSe and CuSe
2deng miniaturization compound, thus magnetic is deteriorated.
In addition, Si and Al can be 2.5%≤[Si]+[Al]≤3.5%.Can be 2.8%≤[Si]+[Al]≤3.2% (wherein, [Si] and [Al] be % by weight for Si and Al) in more detail.
When [Si]+[Al] lower than 2.5% time, the improvement effect of high-frequency iron loss is lower, and when more than 3.5%, the Vickers' hardness (Hv) of material can more than 220, thus cause productivity to be deteriorated.
In addition, Cr and Mn can be 1.2%≤[Cr]+[Mn]≤6.8%.Can be 3%≤[Cr]+[Mn]≤6% (wherein, [Cr] and [Mn] be Cr and Mn % by weight) in more detail.
When [Cr]+[Mn] lower than 1.2% time, the improvement effect of high-frequency iron loss is lower, and when more than 6.8%, set tissue can be deteriorated, thus causes magnetic to be deteriorated.
Si, A, Mn and Cr can meet formula below.
4.1％≤[Si]+[Al]+([Mn]/2)+([Cr]/2)≤5.9％
In more detail, Si, Al, Mn and Cr can meet formula below.
4.8％≤[Si]+[Al]+([Mn]/2)+([Cr]/2)≤5.8％
This is because, when [Si]+[Al]+([Mn]/2)+([Cr]/2) are more than 4.1% could compared with common non-oriented electromagnetic steel sheet raising intrinsic resistance, when more than 5.9%, set tissue can be caused to be deteriorated due to the interpolation of a large amount of alloying elements, and can saturation magnetic flux density be reduced, thus lose the improvement effect of high-gradient magnetism.
Below, the manufacture method of non-oriented electromagnetic steel sheet of the present invention is described.
The manufacture method of non-oriented electromagnetic steel sheet of the present invention, slab is provided, described slab in % by weight for, comprise Si:2.0 ~ 3.5%, Mn:0.5 ~ 3.5%, Cr:0.5 ~ 3.5%, Al: be greater than 0% and less than 0.8%, below C:0.004%, below S:0.004%, below N:0.004%, below Ti:0.004%, below P:0.004%, to meet with Sn and Sb of following formula 1 to any one scope in the composition of formula 3, residual is Fe and other impurity unavoidably added.
Further, described slab can meet following formula 4 to formula 6.
0.010%≤Sn≤0.080% ... formula 1
0.005%≤Sb≤0.050% ... formula 2
0.01%≤[Sn]+[Sb]≤0.10% ... formula 3
(wherein, [Sn] and [Sb] is Sn and Sb % by weight.)
2.5%≤[Si]+[Al]≤3.5% ... formula 4
1.2%≤[Cr]+[Mn]≤6.8% ... formula 5
4.1%≤[Si]+[Al]+([Mn]/2)+([Cr]/2)≤5.9% ... formula 6
(wherein, [Si], [Al], [Mn] and [Cr] are Si, Al, Mn and Cr % by weight.)
In addition, described slab can comprise below Cu:0.025% and below Se:0.0080% further, and described Se and Cu can meet [Se]+[0.5 × Cu]≤0.01%.
In addition, described electrical sheet can comprise below Mg:0.003%.
After described slab is reheated with the temperature of 1100 DEG C ~ 1250 DEG C, be rolled and manufacture hot-rolled steel sheet.
In the operation that slab is reheated, when the temperature reheated is more than 1250 DEG C, the inclusion being unfavorable for magnetic can be there is and to be melted in again in slab and by the problem of fine precipitation, when the temperature reheated is lower than 1100 DEG C, to be difficult to carry out hot rolling.
Carry out hot rolling by the slab reheated described process and manufacture hot-rolled steel sheet.The final rolling of hot rolling can be implemented under the temperature more than 800 DEG C.
By carrying out hot-rolled sheet annealing to the hot-rolled sheet through hot rolling at the temperature of 850 ~ 1150 DEG C, increase the crystalline orientation favourable to magnetic.
When hot-roll annealing temperature is lower than 850 DEG C, organizes and do not grow up or micro-growth, therefore the upper ascending effect of magneticflux-density is less.
When annealing temperature is more than 1150 DEG C, magnetic properties can be caused on the contrary to be deteriorated, and cause rolling operation to be deteriorated due to the distortion of plate shape, therefore temperature range is preferably 850 ~ 1150 DEG C, is more preferably 950 ~ 1150 DEG C.
Afterwards, after carrying out pickling to the steel plate completing the annealing of described hot-rolled sheet, the draft with 70 ~ 95% carries out cold rolling.In addition, in order to reduce high-frequency iron loss, the thin plate of about 0.35mm ~ 0.2mm thickness can be fabricated to.
Final annealing is carried out to produce non-oriented electromagnetic steel sheet to described cold-rolled steel sheet.
Final annealing is implemented at the temperature of 750 ~ 1050 DEG C.
When temperature is lower than 750 DEG C, the recrystallize produced is abundant not, and when final annealing temperature is more than 1050 DEG C, crystallization particle diameter becomes excessive, and high-frequency iron loss can be caused to be deteriorated.In addition, in more detail, can be 900 ~ 1050 DEG C.
The grain size completing the non-oriented electromagnetic steel sheet of described final annealing can be 50 ~ 150 μm.
Below, be described in detail by the manufacture method of embodiment to non-oriented electromagnetic steel sheet of the present invention.But it should be noted that, the following examples just provide to exemplify the present invention, and content of the present invention is not limited to the following examples.
[embodiment 1]
[table 1]
In order to observe the effect reached by control Si, Al, Mn and Cr, the steel of composition as shown in table 1 is heated with the temperature of 1150 DEG C, and at the temperature of 850 DEG C, carry out final hot rolling and manufacture the hot-rolled sheet that plate thickness is 2.0mm.
Pickling is carried out to after the hot-rolled sheet of hot rolling carries out the annealing of four minutes at the temperature of 1100 DEG C.
Afterwards, carry out cold rolling make plate thickness become 0.30mm after, the final annealing carrying out for 38 seconds at each temperature shown in table.
Magnetic represents in table 2 below, and magnetic is decided by the mean value of the rolling direction utilizing single board test apparatus (Single Sheet tester) to detect and vertical direction.
[table 2]
Belonging to the kind of steel of scope of the present invention, namely when X4, X7, X11 and X13, intrinsic resistance composition is optimised, and therefore processibility is good, and the growth of crystallization particle diameter is also excellent, obtains the magnetic of five-star non-oriented electromagnetic steel sheet.On the contrary, X1 and X2 due to intrinsic resistance lower, therefore high-frequency iron loss is poor, and X3 is not owing to adding special elements and Sn or Sb, and therefore magneticflux-density is lower.X5, X6 and X9 due to much higher hard rolling poor, therefore cannot be produced by common electric steel operation.X10 increases due to the content of Al, also increases at the inclusion of material internal, thus the growth of crystal grain is lower, and therefore magnetic is poor.It can thus be appreciated that when departing from the scope of the present invention, the growth of crystal grain is poor and cause magnetic not enough, or hardened material and be difficult to be manufactured by common operation.
[embodiment 2]
The embodiment of table 3 for providing the impact of magnetic in order to clear and definite Se and Cu.The steel ingot of composition shown in his-and-hers watches 3 carries out vacuum melting and manufactures.
C, S, N and Ti are all controlled be 0.0020 ~ 0.0022%.Under the condition identical with the condition shown in table 1 and table 2, hot rolling is carried out to the steel ingot so obtained..
Just reheat, heat after two hours at the temperature of 1150 DEG C, at the temperature of 850 DEG C, carry out final hot rolling and manufacture the hot-rolled sheet that plate thickness is 2.0mm.
Pickling is carried out to after the hot-rolled sheet of hot rolling carries out the annealing of four minutes at the temperature of 1100 DEG C.Afterwards, carry out cold rolling and after making plate thickness become 0.30mm, at the final annealing carrying out for 38 seconds at each temperature shown in table.
Magnetic is decided by the mean value of the rolling direction utilizing single board test apparatus (Single Sheet tester) to detect and vertical direction.
Y2, Y4, Y5, Y8, Y9 and Y10 of being equivalent to example control as below benchmark due to Cu and Se, and therefore magnetic is excellent, and contrary Y1 exceedes benchmark due to Se, therefore magnetic is poor, the Se+0.5Cu of Y3, Y6, Y7 and Y11 is more than 0.01, Y12 because Cu exceedes benchmark, and therefore magnetic is poor.This condition represents in Table 1.
[table 3]
Claims (8)
1. a non-oriented electromagnetic steel sheet, wherein,
In % by weight for, comprise Si:2.0 ~ 3.5%, Mn:0.5 ~ 3.5%, Cr:0.5 ~ 3.5%, Al: be greater than 0% and less than 0.8%, below C:0.004%, below S:0.004%, below N:0.004%, below Ti:0.004%, below P:0.004%, meet with Sn and Sb of following formula 1 to any one scope in the composition of formula 3, residual is Fe and other impurity unavoidably added
And meet following formula 4 to formula 6,
0.010%≤Sn≤0.080% ... formula 1
0.005%≤Sb≤0.050% ... formula 2
0.01%≤[Sn]+[Sb]≤0.10% ... formula 3
Wherein, [Sn] and [Sb] is Sn and Sb % by weight,
2.5%≤[Si]+[Al]≤3.5% ... formula 4
1.2%≤[Cr]+[Mn]≤6.8% ... formula 5
4.1%≤[Si]+[Al]+([Mn]/2)+([Cr]/2)≤5.9% ... formula 6
Wherein, [Si], [Al], [Mn] and [Cr] are Si, Al, Mn and Cr % by weight.
2. non-oriented electromagnetic steel sheet according to claim 1, wherein, comprises further:
Below Cu:0.025% and below Se:0.0080%, and
Described Se and Cu meets [Se]+[0.5 × Cu]≤0.01%,
Wherein, [Se] and [Cu] is Se and Cu % by weight.
3. non-oriented electromagnetic steel sheet according to claim 1 and 2, wherein,
Described electrical sheet comprises below Mg:0.003%.
4. non-oriented electromagnetic steel sheet according to claim 3, wherein,
The Vickers' hardness Hv of described electrical sheet is less than 220.
5. non-oriented electromagnetic steel sheet according to claim 4, wherein,
The size of the crystal grain in the micro organization of described electrical sheet is 50 ~ 150 μm.
6. a manufacture method for non-oriented electromagnetic steel sheet, wherein, comprises the following steps:
Slab is provided, described slab in % by weight for, comprise Si:2.0 ~ 3.5%, Mn:0.5 ~ 3.5%, Cr:0.5 ~ 3.5%, Al: be greater than 0% and less than 0.8%, below C:0.004%, below S:0.004%, below N:0.004%, below Ti:0.004%, below P:0.004%, to meet with Sn and Sb of following formula 1 to any one scope in the composition of formula 3, residual is Fe and other impurity unavoidably added;
After described slab is reheated with the temperature of 1100 DEG C ~ 1250 DEG C, be rolled and manufacture hot-rolled steel sheet;
Described hot-rolled steel sheet is rolled and manufactures cold-rolled steel sheet; And
Final annealing is carried out to described cold-rolled steel sheet,
And described slab meets following formula 4 to formula 6,
0.010%≤Sn≤0.080% ... formula 1
0.005%≤Sb≤0.050% ... formula 2
0.01%≤[Sn]+[Sb]≤0.10% ... formula 3
Wherein, [Sn] and [Sb] is Sn and Sb % by weight,
2.5%≤[Si]+[Al]≤3.5% ... formula 4
1.2%≤[Cr]+[Mn]≤6.8% ... formula 5
4.1%≤[Si]+[Al]+([Mn]/2)+([Cr]/2)≤5.9% ... formula 6
Wherein, [Si], [Al], [Mn] and [Cr] are Si, Al, Mn and Cr % by weight.
7. the manufacture method of non-oriented electromagnetic steel sheet according to claim 6, wherein,
Described slab comprises below Cu:0.025% and below Se:0.0080% further,
Described Se and Cu meets [Se]+[0.5 × Cu]≤0.01%.
8. the manufacture method of non-oriented electromagnetic steel sheet according to claim 7, wherein,
Described electrical sheet comprises below Mg:0.003%.
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| WO2021037061A1 (en) | 2019-08-26 | 2021-03-04 | 宝山钢铁股份有限公司 | 600mpa grade non-oriented electrical steel sheet and manufacturing method thereof |
| CN112609128A (en) * | 2020-11-30 | 2021-04-06 | 武汉钢铁有限公司 | Non-oriented silicon steel plate with excellent corrosion resistance for high-efficiency motor and production method thereof |
| JP7559220B2 (en) | 2020-09-01 | 2024-10-01 | ティッセンクルップ スチール ヨーロッパ アクチェンゲゼルシャフト | Non-oriented metal flat plate product, method for producing non-oriented metal flat plate product, and use of non-oriented metal flat plate product |
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| KR101918720B1 (en) * | 2016-12-19 | 2018-11-14 | 주식회사 포스코 | Non-oriented electrical steel sheet and method for manufacturing the same |
| JP7401729B2 (en) * | 2019-04-05 | 2023-12-20 | 日本製鉄株式会社 | Non-oriented electrical steel sheet |
| CN112375965A (en) * | 2020-10-17 | 2021-02-19 | 北京科技大学 | Preparation method of Cu-containing high-strength low-iron-loss non-oriented high-silicon steel |
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