CN103952629A - Medium-silicon cold-rolled non-oriented silicon steel and manufacturing method thereof - Google Patents
Medium-silicon cold-rolled non-oriented silicon steel and manufacturing method thereof Download PDFInfo
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- CN103952629A CN103952629A CN201410200432.7A CN201410200432A CN103952629A CN 103952629 A CN103952629 A CN 103952629A CN 201410200432 A CN201410200432 A CN 201410200432A CN 103952629 A CN103952629 A CN 103952629A
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Abstract
The invention belongs to the field of ferrous metallurgy and processing technology, and particularly relates to a medium-silicon cold-rolled non-oriented silicon steel and a manufacturing method thereof. The medium-silicon cold-rolled non-oriented silicon steel comprises the following chemical elements in percentage by mass: 1.5-1.7% of Si, 0.2-0.3% of Al, 0.3-0.6% of Mn, 0.1-0.3% of Cu, no more than 0.003% of C, no more than 0.007% of P, no more than 0.003% of S, no more than 0.005% of N, and the balance of ferrum and inevitable impurities. The conditions of the production technology are as follows: the thickness of a forging blank is 18-20mm, the heating temperature of the forging blank is at 1100-1150DEG C, the number of rolling passes is five, the total reduction rate is 83-86%, the reduction rate of each pass is 25-35%, the finally rolling temperature is guaranteed to be more than 950DEG C, and the winding temperature is 550-560DEG C; the normalizing annealing temperature is 920-930DEG C, and the annealing time is 20-30 minutes. The production technology is simple, the requirement for equipment is low, and the medium-silicon cold-rolled non-oriented silicon steel can be widely applied to cold-rolled non-oriented silicon steel production factories at different equipment levels, and is strong in technology universality.
Description
Technical field
The invention belongs to ferrous metallurgy and processing technique field, particularly silicon cold rolling non-orientation silicon steel and manufacture method in one.
Background technology
Silicon steel is mainly used as iron core and other electrical component of various motors, generator and transformer, it is indispensable important non-retentive alloy in electric power, electronics and war industry, its the key technical indexes is iron loss and magnetic strength, reduces iron loss, and improving magnetic strength is that silicon steel is produced the target of pursuing.Can not only reduce the iron loss of silicon steel owing to improving texture, and can also improve its magnetic strength, therefore people have been put into attention the research that how to improve non orientating silicon steel texture gradually and come up in recent years.Kubo Tian Meng (Kubo Tian Meng, Japanese Patent Publication, clear 62-1800142 (1987)) research discovery, add 0.06～0.1%Sn in 0.4～0.5%Si steel in, add 0.31～0.39%Cu, can greatly improve the texture of steel, thereby the magnetic property of steel is improved, but its reason unclear.The people such as G.Lyudkovsky (G.Lyudkovsky, J.M.Shapiro.Effectofaluminumcontentandprocessingon textureandpermeabilityoflaminationsteels.JournalofApplie dPhysics, 1985, 57 (8): 4235.) studied the impact that AlN forms non-oriented electrical steel recrystallization texture, found that electrical steel composition, slab heating temperature, the processing parameters such as coiling temperature are all that the impact of the AlN amount by separating out in hot-rolled strip realizes impact on the finished product magnetic property, the AlN separating out in hot-rolled strip is more, the AlN separating out in cold rolling rear recrystallization annealing process is just fewer, in steel, { 111} reduces unfavorable texture component thereupon, the magnetic property of the finished product is just better.
Summary of the invention
The object of this invention is to provide silicon cold rolling non-orientation silicon steel and manufacture method in one.It is characterized in that: in the cold rolling non-orientation silicon steel of (Si+Al)=1.7～1.9% (mass percent), added appropriate copper; suitable hot rolling, batch with normalizing annealing processing condition under; utilize a large amount of cupric second-phases of separating out in hot-rolled strip to promote the favorable texture component { formation of 110} in steel; reduce unfavorable texture component the formation of 111}, thus the magnetic property of steel is improved greatly.The cold rolling non-orientation silicon steel of manufacturing by present method, its magnetic induction density B
50> 1.7T, iron loss P
1.5< 3.2W/kg.(application number is respectively 200910083999.X and 201010216966.0 to two patents of previously having applied for the first contriver, wherein previous apply for a patent authorized, the patent No. is ZL200910083999.X) compare, in this invention the Si content of silicon steel and (Si+Al) content (mass percent) significantly increase.The Si content that the first two is applied for a patent middle silicon steel is respectively 1.08～1.28% and 0.9～1.25%, and (Si+Al) content is respectively 1.1～1.3% and 1.05～1.4%, belongs to low-silicon steel; And the Si content of silicon steel is 1.5～1.7% in the present invention, (Si+Al) content is 1.7～1.9%, silicon steel in genus.In addition, the present invention has also reduced the carbon content in silicon steel, and C≤0.005% (mass percent) in being applied for a patent by the first two has been reduced to C≤0.003% in the present invention.Compared with silicon steel in applying for a patent with the first two, thereby the present invention improves (Si+Al) content by carrying high Si content, reduce carbon content, and strictly control its manufacturing process, (the first two magnetic property of applying for a patent middle silicon steel is respectively: magnetic induction density B in the situation that not reducing magnetic strength, can to obtain the silicon steel that iron loss is lower
50> 1.7T, iron loss P
1.5< 4.0W/kg and B
50> 1.7T, P
1.5< 3.5W/kg; And the magnetic property of silicon steel is in the present invention: B
50> 1.7T, P
1.5< 3.2W/kg).
Technical scheme of the present invention is:
Silicon cold rolling non-orientation silicon steel in one, its chemical composition is by mass percentage: Si:1.5～1.7%, Al:0.2～0.3%, Mn:0.3～0.6%, Cu:0.1～0.3%, C≤0.003%, P≤0.007%, S≤0.003%, N≤0.005%, all the other are iron and inevitable impurity.
Silicon and aluminium all can improve the resistivity of iron, reduce its iron loss.But higher sial content can make the magnetic strength of silicon steel reduce, therefore (Si+Al) content of silicon steel is designed to 1.7～1.9% in the present invention, so that it had both had lower iron loss, has again higher magnetic strength.Mn can promote favorable texture component in cold rolling non-orientation silicon steel, and { formation of 110}, therefore added 0.3～0.6% manganese in silicon steel of the present invention.In order to make to separate out a large amount of cupric second-phases in hot-rolled strip, in silicon steel of the present invention, add 0.1～0.3% copper.In addition, reduce the content of carbon in steel, sulphur, phosphorus, nitrogen, to improve the magnetic property of silicon steel as far as possible.Silicon steel in the present invention requires its C≤0.003%, P≤0.007%, S≤0.003%, N≤0.005%.
In this, the manufacture method of silicon cold rolling non-orientation silicon steel comprises the steps:
(1) smelt and forge
Vacuum induction furnace smelting also forges, obtain the following forging stock of chemical composition by mass percentage: Si:1.5～1.7%, Al:0.2～0.3%, Mn:0.3～0.6%, Cu:0.1～0.3%, C≤0.003%, P≤0.007%, S≤0.003%, N≤0.005%, all the other are iron and inevitable impurity.Forging stock thickness is 18～20mm.
(2) hot rolling with batch
Forging stock Heating temperature is 1100～1150 DEG C, and rolling pass is 5 passages, and total reduction is 83～86%, and every time draft is 25～35%, ensures that finishing temperature is more than 950 DEG C, and coiling temperature is 550～560 DEG C.
(3) normalizing annealing and pickling
Normalizing annealing temperature is 920～930 DEG C, and annealing time is 20～30 minutes, uses temperature and enter the heating mode of stove, and after annealing, air cooling is to room temperature.Normalizing annealing plate, after pickling descaling, enters cold rolling process.
(4) cold rolling and annealing
Adopt once cold rolling method that the hot-rolled sheet after pickling is rolled to finished product thickness, be generally 0.5mm, then at dry 25%H
2+ 75%N
2in (dew point is lower than 0 DEG C) protective atmosphere, carry out finished products.
The present invention compared with prior art has following beneficial effect:
1. adopt manufacture method of the present invention can obtain middle silicon cold rolling non-orientation silicon steel, its magnetic induction density B
50> 1.7T, iron loss P
1.5< 3.2W/kg.
2. because the present invention utilizes a large amount of cupric second-phases of separating out in hot-rolled strip to improve cold rolling non-orientation silicon steel texture, therefore be different from the production principle of current existing cold rolling non-orientation silicon steel.Production technique is simple, not high to equipment requirements, can be widely used in the cold rolling non-orientation silicon steel manufacturer of different equipments, and technique versatility is stronger.
Brief description of the drawings
Cupric second-phase in Fig. 1 hot-rolled strip
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is described in further detail, but the specific embodiment of the present invention is not limited to following embodiment.
Embodiment 1
Chemical composition (being calculated in mass percent) is: C:0.0029%, Si+Al=1.68%+0.20%, Mn:0.46%, Cu:0.17%, P:0.0053%, S:0.0025%, N:0.0031%, all the other are the forging stock of iron and inevitable impurity, after 1150 DEG C of soaking, carry out 5 passage hot rollings, total reduction is 85.5%, every time draft is 25～35%, by 20.0mm → 14.0mm → 9.1mm → 6.0mm → 3.9mm → 2.9mm.Finishing temperature is 960 DEG C, and coiling temperature is 560 DEG C.Hot-rolled sheet after 920 DEG C of normalizing annealing 30min air cooling to room temperature, and then pickling descaling.Normalizing annealing plate is cold rolled to finished product thickness 0.5mm by once cold rolling method, then at dry 25%H
2+ 75%N
2in (dew point is lower than 0 DEG C) protective atmosphere, carry out finished products.The magnetic property of gained finished product is: B
50=1.74T, P
1.5=3.17W/kg.
Embodiment 2
Chemical composition (being calculated in mass percent) is: C:0.0024%, Si+Al=1.52%+0.21%, Mn:0.58%, Cu:0.29%, P:0.0065%, S:0.0017%, N:0.0048%, all the other are the forging stock of iron and inevitable impurity, after 1100 DEG C of soaking, carry out 5 passage hot rollings, total reduction is 83.3%, every time draft is 25～35%, by 18.0mm → 13.5mm → 8.8mm → 5.8mm → 4.0mm → 3.0mm.Finishing temperature is 970 DEG C, and coiling temperature is 550 DEG C.Hot-rolled sheet after 930 DEG C of normalizing annealing 20min air cooling to room temperature, and then pickling descaling.Normalizing annealing plate is cold rolled to finished product thickness 0.5mm by once cold rolling method, then at dry 25%H
2+ 75%N
2in (dew point is lower than 0 DEG C) protective atmosphere, carry out finished products.The magnetic property of gained finished product is: B
50=1.71T, P
1.5=2.88W/kg.
Embodiment 3
Chemical composition (being calculated in mass percent) is: C:0.0025%, Si+Al=1.59%+0.28%, Mn:0.32%, Cu:0.12%, P:0.0047%, S:0.0021%, N:0.0038%, all the other are the forging stock of iron and inevitable impurity, after 1100 DEG C of soaking, carry out 5 passage hot rollings, total reduction is 84.7%, every time draft is 25～35%, by 19mm → 14.0mm → 9.1mm → 6.0mm → 3.9mm → 2.9mm.Finishing temperature is 960 DEG C, and coiling temperature is 550 DEG C.Hot-rolled sheet after 930 DEG C of normalizing annealing 20min air cooling to room temperature, and then pickling descaling.Normalizing annealing plate is cold rolled to finished product thickness 0.5mm by once cold rolling method, then at dry 25%H
2+ 75%N
2in (dew point is lower than 0 DEG C) protective atmosphere, carry out finished products.The magnetic property of gained finished product is: B
50=1.72T, P
1.5=2.96W/kg.
Claims (2)
1. silicon cold rolling non-orientation silicon steel in a kind, it is characterized in that chemical composition is by mass percentage: Si:1.5～1.7%, Al:0.2～0.3%, Mn:0.3～0.6%, Cu:0.1～0.3%, C≤0.003%, P≤0.007%, S≤0.003%, N≤0.005%, all the other are iron and inevitable impurity.
As claimed in claim 1 in the manufacture method of silicon cold rolling non-orientation silicon steel, it is characterized in that comprising the steps:
(1) smelt and forge:
Vacuum induction furnace smelting also forges, obtain the following forging stock of chemical composition by mass percentage: Si:1.5～1.7%, Al:0.2～0.3%, Mn:0.3～0.6%, Cu:0.1～0.3%, C≤0.003%, P≤0.007%, S≤0.003%, N≤0.005%, all the other are iron and inevitable impurity, and forging stock thickness is 18～20mm;
(2) hot rolling with batch:
Forging stock Heating temperature is 1100～1150 DEG C, and rolling pass is 5 passages, and total reduction is 83～86%, and every time draft is 25～35%, ensures that finishing temperature is more than 950 DEG C, and coiling temperature is 550～560 DEG C;
(3) normalizing annealing and pickling:
Normalizing annealing temperature is 920～930 DEG C, and annealing time is 20～30 minutes, uses temperature and enter the heating mode of stove, and after annealing, air cooling is to room temperature; Normalizing annealing plate, after pickling descaling, enters cold rolling process;
(4) cold rolling and annealing:
Adopt once cold rolling method that the hot-rolled sheet after pickling is rolled to finished product thickness, then at dry 25%H
2+ 75%N
2in protective atmosphere, carry out finished products, 25%H
2+ 75%N
2protective atmosphere dew point is lower than 0 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286014A (en) * | 2018-01-16 | 2018-07-17 | 北京科技大学 | A kind of preparation method of low iron loss high intensity non-oriented electrical steel |
| CN110241362A (en) * | 2019-07-09 | 2019-09-17 | 鞍钢股份有限公司 | A kind of driving motor non-orientation silicon steel and its production method |
| CN112322972A (en) * | 2020-10-17 | 2021-02-05 | 北京科技大学 | Method for improving comprehensive performance of high-strength non-oriented high-silicon steel through normalizing treatment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0413306B1 (en) * | 1989-08-18 | 1996-04-10 | Nippon Steel Corporation | Method of producing non-oriented magnetic steel plate having high magnetic flux density |
| JP2007031754A (en) * | 2005-07-25 | 2007-02-08 | Sumitomo Metal Ind Ltd | Method for manufacturing non-oriented electromagnetic steel sheet to be aged |
| JP2009084646A (en) * | 2007-09-28 | 2009-04-23 | Kobe Steel Ltd | Soft magnetic steel member, soft magnetic steel component, and method for producing the same |
| CN101528385A (en) * | 2006-10-23 | 2009-09-09 | 新日本制铁株式会社 | Method for manufacturing non-oriented electrical sheet having excellent magnetic properties |
| CN101921956A (en) * | 2010-06-23 | 2010-12-22 | 北京科技大学 | High-magnetic induction, low-iron loss, low-carbon, low-silicon and non-oriented electrical steel and manufacturing method thereof |
| EP2390373A1 (en) * | 2008-12-31 | 2011-11-30 | Baoshan Iron & Steel Co., Ltd. | Method for manufacturing grain oriented silicon steel with single cold rolling |
-
2014
- 2014-05-13 CN CN201410200432.7A patent/CN103952629B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0413306B1 (en) * | 1989-08-18 | 1996-04-10 | Nippon Steel Corporation | Method of producing non-oriented magnetic steel plate having high magnetic flux density |
| JP2007031754A (en) * | 2005-07-25 | 2007-02-08 | Sumitomo Metal Ind Ltd | Method for manufacturing non-oriented electromagnetic steel sheet to be aged |
| CN101528385A (en) * | 2006-10-23 | 2009-09-09 | 新日本制铁株式会社 | Method for manufacturing non-oriented electrical sheet having excellent magnetic properties |
| JP2009084646A (en) * | 2007-09-28 | 2009-04-23 | Kobe Steel Ltd | Soft magnetic steel member, soft magnetic steel component, and method for producing the same |
| EP2390373A1 (en) * | 2008-12-31 | 2011-11-30 | Baoshan Iron & Steel Co., Ltd. | Method for manufacturing grain oriented silicon steel with single cold rolling |
| CN101921956A (en) * | 2010-06-23 | 2010-12-22 | 北京科技大学 | High-magnetic induction, low-iron loss, low-carbon, low-silicon and non-oriented electrical steel and manufacturing method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286014A (en) * | 2018-01-16 | 2018-07-17 | 北京科技大学 | A kind of preparation method of low iron loss high intensity non-oriented electrical steel |
| CN108286014B (en) * | 2018-01-16 | 2020-02-14 | 北京科技大学 | Preparation method of low-iron-loss high-strength non-oriented electrical steel |
| CN110241362A (en) * | 2019-07-09 | 2019-09-17 | 鞍钢股份有限公司 | A kind of driving motor non-orientation silicon steel and its production method |
| CN110241362B (en) * | 2019-07-09 | 2021-05-28 | 鞍钢股份有限公司 | Non-oriented silicon steel for driving motor and production method thereof |
| CN112322972A (en) * | 2020-10-17 | 2021-02-05 | 北京科技大学 | Method for improving comprehensive performance of high-strength non-oriented high-silicon steel through normalizing treatment |
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