CN101812629A - Non-oriented electrical sheet steel with good iron loss and manufacturing method thereof - Google Patents
Non-oriented electrical sheet steel with good iron loss and manufacturing method thereof Download PDFInfo
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- CN101812629A CN101812629A CN200910046595A CN200910046595A CN101812629A CN 101812629 A CN101812629 A CN 101812629A CN 200910046595 A CN200910046595 A CN 200910046595A CN 200910046595 A CN200910046595 A CN 200910046595A CN 101812629 A CN101812629 A CN 101812629A
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- steel plate
- iron loss
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- steel
- manufacture method
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 20
- 238000000137 annealing Methods 0.000 claims description 12
- 238000005098 hot rolling Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000005097 cold rolling Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005554 pickling Methods 0.000 claims description 3
- 238000009628 steelmaking Methods 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 11
- 229910052761 rare earth metal Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention provides a non-oriented electrical sheet steel with good iron loss, which is characterized in that the non-oriented electrical sheet steel with good iron loss comprises the following components in percentage by weight: C: <= 0.003%, Si: <=1.0%, Mn: <=0.20%, Al: <= 0.001-0.009%, S: <=0.004%, N: <=0.003%, Ti: <= 0.0020%, Al/Si: 0-0.006 and Mn/Si: 0-0.2, wherein the proportion of three element inclusion SiO2-Al2O3-MnO is as follows: SiO2: >=95%, Al2O3: 2-3% and MnO: <=2%, and the balance Fe and inevitable impurities. The invention also provides a manufacturing method for the steel. An optimal component range of Si, Mn and Al is set through research, the level of the oxidized inclusion and precipitates are controlled, growth of grains is promoted and the non-oriented electrical sheet steel with low iron loss is obtained.
Description
Technical field
The present invention relates to metallurgical steel plate and manufacture method thereof, specifically, the present invention relates to a kind of non-oriented electromagnetic steel sheet that has excellent core loss and manufacture method thereof.
Background technology
Along with countries in the world improve constantly energy-conservation requirement, to the efficient and energy-conservation the having higher requirement of motor and transformer, as the core material of motor and transformer and the non-oriented electromagnetic steel sheet that uses also requires lower iron loss and more low-cost.In order to address this problem, typical method has following several at present:
1, as the low iron loss technology of Si content at the low price non-oriented electromagnetic steel sheet below 1%, the Japanese documentation spy opens the method that clear 52-2824 communique and the flat 3-215627 communique of Te Kai disclose interpolation rare earth element (REM), its purpose mainly is to reduce the tiny precipitate that sulfide is formed, grain growth when promoting final annealing and stress relieving in 750 ℃ * 2 hours is sought the non-oriented electromagnetic steel sheet product of low iron lossization.
2, Chinese patent literature 95105753.7 is opened on the basis of clear 52-2824 communique and the flat 3-215627 communique of Te Kai the Japanese documentation spy, a kind of steel plate is disclosed, it is by adding REM in the non-oriented electromagnetic steel sheet of Si content below 1%, further reduce Zr, Ti, make superfine little thickization of precipitate of the grain growth of obstruction in the stress relieving process of low temperature short period of time, innoxious, obtain the non-oriented electromagnetic steel sheet that has excellent core loss after the stress relieving of low temperature short period of time (725 ℃ * 1 hour).The composition of this steel plate is that Si:1.0% is following, Mn:0.1% above, Sol.Al:0.2～1.5%, REM:2～80ppm, Ti:15ppm are following, below the Zr:80ppm, remainder is made up of Fe and unavoidable impurities.
3, Chinese patent literature 200580011424.7 discloses a kind ofly by being that purpose is added the improvement scheme of sneaking into element S in B and the steel inevitably to suppress that AlN separates out, and its steel plate composition is that Si:1.5% is following, Mn:0.4～1.5%, Sol.Al:0.01～0.04%, Ti:0.0015% is following, N:0.0030% is following, S:0.0010～0.0040%, Sn:0.01～0.50%, B: with B/N be 0.5～1.5, remainder is made up of Fe and unavoidable impurities; Contain in the steel in the sulfide of Mn, separate out with the B precipitate is compound more than 10% with the number ratio; The crystal grain diameter of steel plate is that crystal grain diameter is more than the 50 μ m after following and 750 ℃ * 2 hours the stress relieving of 30 μ m.Its manufacture method is to pine in adding of hot-rolled sheet, in 1150～1250 scope, stop more than 5 minutes, then stop more than 15 minutes in 1050～1150 scope, carry out hot rolling then immediately, its hot rolled finish to gauge temperature out is set at T 〉=900-1000 * Sn (wt%).
Therefore Si content is that the low iron loss technology of the non-oriented electromagnetic steel sheet below 1.5% mainly is to adopt to add REM at present, and control sulfide reduces detrimental impurity unit and usually realizes; Perhaps adopt adding B is purpose to suppress that AlN separates out, compound the separating out of control BN precipitate, and the controlled rolling method that is equipped with twice stop in the course of hot rolling realizes.But, under the situation that requires cost further to reduce, be difficult to fully and stably make the non-oriented electromagnetic steel sheet that has excellent core loss in order to last method.
Therefore, for overcoming the above problems, the object of the present invention is to provide a kind of non-oriented electromagnetic steel sheet that has excellent core loss and manufacture method thereof, set optimum Si, Mn, the composition range of Al by research, the rank of controlled oxidation inclusion and precipitate, grain growth when promoting final annealing and stress relieving in 750 ℃ * 2 hours obtains to hang down the non-oriented electromagnetic steel sheet of iron loss.
Summary of the invention
First aspect of the present invention provides a kind of non-oriented electromagnetic steel sheet, comprise following composition: C by weight percentage :≤0.003%, Si :≤1.0%, Mn :≤0.20%, Al:0.001～0.009%, S :≤0.004%, N :≤0.003%, Ti :≤0.0020%, Al/Si:0～0.006, Mn/Si:0～0.2, wherein SiO
2-Al
2O
3-MnO ternary inclusion ratio is: SiO
2: 〉=95%, Al
2O
3: 2～3%, MnO :≤2%, all the other are Fe and unavoidable impurities.
Preferably, described Al/Si is 0～0.003.
Preferably, C class oxide inclusion is controlled at below 1.5 grades in the described steel plate; More excellent is that C class oxide inclusion is controlled at below 1.0 grades.
Preferably, after stress relieving in 750 ℃ * 2 hours, its crystal grain more than 45 μ m, iron loss (P
15/50) below 3.8W/kg; More excellent is, its crystal grain more than 50 μ m, iron loss (P
15/50) below 3.3W/kg.
Non-oriented electromagnetic steel sheet of the present invention is controlled within 0～0.006 Al/Si, and Mn/Si is controlled at 0～0.2, mainly is when guaranteeing that N separates out AlN in Sol.Al and the steel, at SiO
2Separate out on the inclusion phase interface, reduce the quantity of the AlN that disperse is separated out in the steel; Make SiO in the steel simultaneously
2-Al
2O
3-MnO ternary inclusion ratio satisfies SiO
2〉=95%, Al
2O
32%～3%, MnO is controlled at below 2%, mainly is that control C type impurity rank is below 1.5.
Second aspect of the present invention provides the manufacture method of this non-oriented electromagnetic steel sheet, comprises steel-making, hot rolling, pickling, cold rolling, annealing operation.
Preferably, Heating temperature is 1050～1100 ℃ in the described hot-rolled process.
Preferably, finishing temperature is more than 850 ℃ in the described hot-rolled process.
Preferably, annealing temperature is 700～760 ℃ in the described annealing operation.
In manufacture method of the present invention, to satisfy 1050 ℃～1100 ℃ to slab heating temperature, carry out hot rolling then, and the hot rolled finishing temperature is controlled at more than 850 ℃, and the plate temperature control of the final annealing after cold rolling is at 700 ℃～760 ℃, mainly be that AlN and MnS small and dispersed in steel are separated out in the control steel, prevent that iron loss after the stress relieving from not conforming to and fluctuate.
Beneficial effect of the present invention:
1, plate property be improved significantly.Non-oriented electromagnetic steel sheet iron loss improvement amplitude after the stress relieving reaches 46.1%, can reach high trade mark 50A400 non-oriented electromagnetic steel sheet performance level by the non-oriented electromagnetic steel sheet performance level of low trade mark 50A1000.
2, cost is low, and is simple to operate.The present invention does not need to add REM or adds B, and the controlled rolling of twice stop in the cancellation course of hot rolling is applicable to big in batches production.
Embodiment
Below for a more detailed description with embodiment to the present invention.These embodiment only are the descriptions to best mode for carrying out the invention, scope of the present invention are not had any restriction.
The main chemical compositions of related steel of the embodiment of the invention and the related steel of comparative example sees Table 1, with molten steel through converter, RH refining treatment, pour into base after, through hot rolling, pickling, cold rolling, annealing obtains the non orientating silicon steel product after the coating.Wherein, the hot rolled slab heating temperature is 1050～1100 ℃, roll into the band steel of 2.6mm through hot rolling, the hot rolled finishing temperature is more than 850 ℃, with the band steel of the cold rolling one-tenth of the hot rolled strip of 2.6mm 0.5mm, carries out final annealing and coating more then, the plate temperature of the final annealing after cold rolling is 700～760 ℃, through stress relieving in 750 ℃ * 2 hours, obtain non-oriented electromagnetic steel sheet at last, the performance of gained steel plate sees Table 2.The core loss property index of the non-oriented electromagnetic steel sheet of embodiment gained steel plate and trade mark 50A1000,50A400 sees Table 3.
The main chemical compositions (wt%) of related steel of table 1 embodiment of the invention and the related steel of comparative example
The performance of table 2 embodiment of the invention gained steel plate and comparative example gained steel plate
By table 1,2 as can be seen, the core loss property index of embodiment gained steel plate will improve 46.1% than the core loss property index of comparative example gained steel plate.
The non-oriented electromagnetic steel sheet of table 3 embodiment gained steel plate and trade mark 50A1000,50A400 core loss property
As can be seen from Table 3, according to the JIS standard, the core loss property of embodiment gained steel plate has been reached the non-oriented electromagnetic steel sheet performance index of high trade mark 50A400 by low trade mark 50A1000.
Claims (10)
1. non-oriented electromagnetic steel sheet, it is characterized in that, comprise following composition: C by weight percentage :≤0.003%, Si :≤1.0%, Mn :≤0.20%, Al:0.001～0.009%, S :≤0.004%, N :≤0.003%, Ti :≤0.0020%, Al/Si:0～0.006, Mn/Si:0～0.2, wherein SiO
2-Al
2O
3-MnO ternary inclusion ratio is: SiO
2: 〉=95%, Al
2O
3: 2～3%, MnO :≤2%, all the other are Fe and unavoidable impurities.
2. steel plate as claimed in claim 1 is characterized in that, described Al/Si is 0～0.003.
3. steel plate as claimed in claim 1 is characterized in that, C class oxide inclusion is controlled at below 1.5 grades in the described steel plate.
4. steel plate as claimed in claim 3 is characterized in that, C class oxide inclusion is controlled at below 1.0 grades in the described steel plate.
5. steel plate as claimed in claim 1 is characterized in that, after stress relieving in 750 ℃ * 2 hours, its crystal grain more than 45 μ m, iron loss (P
15/50) below 3.8W/kg.
6. steel plate as claimed in claim 5 is characterized in that, after stress relieving in 750 ℃ * 2 hours, its crystal grain more than 50 μ m, iron loss (P
15/50) below 3.3W/kg.
7. the manufacture method of the described non-oriented electromagnetic steel sheet of claim 1 comprises steel-making, hot rolling, pickling, cold rolling, annealing operation, it is characterized in that, described steel plate comprises following composition: C by weight percentage :≤0.003%, Si :≤1.0%, Mn :≤0.20%, Al:0.001～0.009%, S :≤0.004%, N :≤0.003%, Ti :≤0.0020%, Al/Si:0～0.006, Mn/Si:0～0.2, wherein SiO
2-Al
2O
3-MnO ternary inclusion ratio is: SiO
2: 〉=95%, Al
2O
3: 2～3%, MnO :≤2%, all the other are Fe and unavoidable impurities.
8. manufacture method as claimed in claim 7 is characterized in that, Heating temperature is 1050～1100 ℃ in the described hot-rolled process.
9. manufacture method as claimed in claim 7 is characterized in that, finishing temperature is more than 850 ℃ in the described hot-rolled process.
10. manufacture method as claimed in claim 7 is characterized in that, annealing temperature is 700～760 ℃ in the described annealing operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910046595A CN101812629A (en) | 2009-02-25 | 2009-02-25 | Non-oriented electrical sheet steel with good iron loss and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910046595A CN101812629A (en) | 2009-02-25 | 2009-02-25 | Non-oriented electrical sheet steel with good iron loss and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101812629A true CN101812629A (en) | 2010-08-25 |
Family
ID=42619996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910046595A Pending CN101812629A (en) | 2009-02-25 | 2009-02-25 | Non-oriented electrical sheet steel with good iron loss and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101812629A (en) |
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| CN102134675A (en) * | 2011-02-22 | 2011-07-27 | 武汉钢铁(集团)公司 | Non-oriented electrical steel produced by continuous casting and rolling of thin slabs and method thereof |
| CN102796948A (en) * | 2011-05-27 | 2012-11-28 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with extremely low content of Ti and smelting method for non-oriented electrical steel plate |
| WO2015025758A1 (en) * | 2013-08-20 | 2015-02-26 | Ｊｆｅスチール株式会社 | Non-oriented magnetic steel sheet and hot-rolled steel sheet thereof |
| WO2016111088A1 (en) * | 2015-01-07 | 2016-07-14 | Ｊｆｅスチール株式会社 | Non-oriented electromagnetic steel sheet and method for producing same |
| JP2016130360A (en) * | 2015-01-07 | 2016-07-21 | Ｊｆｅスチール株式会社 | Non-oriented electromagnetic steel sheet and method for manufacturing the same |
| CN107794439A (en) * | 2016-08-30 | 2018-03-13 | 宝山钢铁股份有限公司 | Extra-low iron loss non-oriented electromagnetic steel sheet and its manufacture method |
| CN107794458A (en) * | 2016-08-30 | 2018-03-13 | 宝山钢铁股份有限公司 | Exempt from magnetized electromagnetic pure iron and its manufacture method with high warping resistance characteristic |
| CN108004463A (en) * | 2016-10-28 | 2018-05-08 | 宝山钢铁股份有限公司 | A kind of non-oriented electrical steel having excellent magnetic characteristics and its manufacture method |
| US10597759B2 (en) | 2013-08-20 | 2020-03-24 | Jfe Steel Corporation | Non-oriented electrical steel sheet having high magnetic flux density and motor |
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-
2009
- 2009-02-25 CN CN200910046595A patent/CN101812629A/en active Pending
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| CN102134675A (en) * | 2011-02-22 | 2011-07-27 | 武汉钢铁(集团)公司 | Non-oriented electrical steel produced by continuous casting and rolling of thin slabs and method thereof |
| WO2012113184A1 (en) * | 2011-02-22 | 2012-08-30 | 武汉钢铁(集团)公司 | Non-oriented electric steel produced by thin slab continuously casting and rolling and producing method thereof |
| CN102796948A (en) * | 2011-05-27 | 2012-11-28 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with extremely low content of Ti and smelting method for non-oriented electrical steel plate |
| CN102796948B (en) * | 2011-05-27 | 2014-03-19 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with extremely low content of Ti and smelting method for non-oriented electrical steel plate |
| WO2015025758A1 (en) * | 2013-08-20 | 2015-02-26 | Ｊｆｅスチール株式会社 | Non-oriented magnetic steel sheet and hot-rolled steel sheet thereof |
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| WO2016111088A1 (en) * | 2015-01-07 | 2016-07-14 | Ｊｆｅスチール株式会社 | Non-oriented electromagnetic steel sheet and method for producing same |
| JP2016130360A (en) * | 2015-01-07 | 2016-07-21 | Ｊｆｅスチール株式会社 | Non-oriented electromagnetic steel sheet and method for manufacturing the same |
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| CN107794458B (en) * | 2016-08-30 | 2019-09-06 | 宝山钢铁股份有限公司 | Exempt from magnetized electromagnetic pure iron and its manufacturing method with highly resistance bending characteristic |
| CN108004463A (en) * | 2016-10-28 | 2018-05-08 | 宝山钢铁股份有限公司 | A kind of non-oriented electrical steel having excellent magnetic characteristics and its manufacture method |
| EP3533895A4 (en) * | 2016-10-28 | 2020-03-18 | Baoshan Iron & Steel Co., Ltd. | NON-ORIENTED GRAIN ELECTRIC STEEL HAVING EXCELLENT MAGNETIC PROPERTIES |
| RU2723121C1 (en) * | 2016-10-28 | 2020-06-08 | Баошан Айрон Энд Стил Ко., Лтд. | Non-oriented electrical steel with excellent magnetic properties and method of production thereof |
| JP2019536903A (en) * | 2016-10-28 | 2019-12-19 | バオシャン アイアン アンド スティール カンパニー リミテッド | Non-oriented electrical steel excellent in magnetic properties and method for producing the same |
| US11162154B2 (en) * | 2016-10-28 | 2021-11-02 | Baoshan Iron & Steel Co., Ltd. | Non-oriented electrical steel having excellent magnetic properties |
| CN112522572A (en) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | Method for producing high-corrosion-resistance steel by twin-roll thin-strip continuous casting |
| WO2025016427A1 (en) * | 2023-07-18 | 2025-01-23 | 宝山钢铁股份有限公司 | Non-oriented electrical steel sheet having high frequency, low iron loss and excellent fatigue performance, and manufacturing method therefor |
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Open date: 20100825 |