CN106480282A - Production method of non-oriented high-efficiency electrical steel - Google Patents
Production method of non-oriented high-efficiency electrical steel Download PDFInfo
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- CN106480282A CN106480282A CN201510523627.XA CN201510523627A CN106480282A CN 106480282 A CN106480282 A CN 106480282A CN 201510523627 A CN201510523627 A CN 201510523627A CN 106480282 A CN106480282 A CN 106480282A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 229910000976 Electrical steel Inorganic materials 0.000 title abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 10
- 239000001257 hydrogen Substances 0.000 claims abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 238000005098 hot rolling Methods 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 238000005262 decarbonization Methods 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 230000003746 surface roughness Effects 0.000 claims abstract description 3
- 238000002791 soaking Methods 0.000 claims description 15
- 238000000137 annealing Methods 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 claims description 12
- 238000005261 decarburization Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000005097 cold rolling Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000003009 desulfurizing effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 238000003763 carbonization Methods 0.000 claims description 2
- 238000007580 dry-mixing Methods 0.000 claims description 2
- 238000004148 unit process Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 238000007670 refining Methods 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 4
- 241001062472 Stokellia anisodon Species 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 241000917122 Greenidea Species 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229940062049 nitrogen 70 % Drugs 0.000 description 1
- 229940063921 nitrogen 75 % Drugs 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
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- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
The invention provides a production method of non-oriented high-efficiency electrical steel, which cancels a refining process and continuous casting electromagnetic stirring, and controls C to be more than or equal to 0.035%, Si to be less than or equal to 2.0% and Als to be less than or equal to 1.0%; controlling the hot rolling heating, initial rolling, final rolling and curling temperature; the hot-rolled coil is not subjected to normalizing treatment, and the cold-rolled surface roughness is 0.65 to 3.00 mu m. Introducing humidifying gas into a decarbonization section of a heat treatment process unit, wherein the dew point D.P. is 20-45 ℃, the atmosphere is more than or equal to 15% of hydrogen and less than or equal to 85% of nitrogen, and the temperature is 760-950 ℃; dry mixed gas is introduced into the reduction section, the dew point D.P is less than or equal to 10 ℃, the atmosphere is more than or equal to 15 percent of hydrogen and less than or equal to 85 percent of nitrogen, and the temperature is controlled to be 800-1050 ℃. The speed of the process section is 50-120 m/min; the pressure difference of the furnace tail and the furnace head is improved by 1-10 Pa on the conventional basis. The method can shorten the process flow, simplify the working procedures, reduce the production cost, reduce the cost per ton of steel by 400-800 yuan, is favorable for releasing the production capacity of each working procedure, and realizes the high-efficiency production of the non-oriented high-efficiency electrical steel.
Description
Technical field
The invention belongs to metallurgical technology technical field, the method for the efficient electrical sheet of more particularly to a kind of high efficiency production No yield point.
Background technology
Electrical sheet is wide variety of metal function soft magnetic materials, in modern metallurgical process is produced and controlled, because carbon is to electromagnetism
Performance, the illeffects of magnetic aging, carry out ultra-low-carbon steel smelting using refinery practice, are aided with low-carbon (LC) or resistance to nothing carbon alloy and auxiliary material
Material carries out production becomes prevailing technology, and improves quality further, carries out strand using electromagnetic mixing apparatus in continuous casting process
Quality control.And silicon steel finished product production line because further control feed carbon content fluctuation, also design decarburization work in heat treatment process
Skill link, is further ensured that the control of properties of product.
With the fast development of downstream application industry technology, and green link energy-conservation is to high efficiency motor and the demand of efficient electrical equipment,
Efficiently electrical steel product is increasingly becoming the main flow of production development, and then (often need to increase hot rolled strip heat treatment step aborning again
Change) high-efficiency electromagnetic performance indications control is carried out, so considerably increasing production cost.
Content of the invention
The present invention provides a kind of production method of the efficient electrical sheet of No yield point, its object is to cancel refinery practice and continuous casting electromagnetism is stirred
Mix, and without normalizing treatment, but the efficient electrical sheet of low iron loss, high magnetic strength is produced by the deep decarburization in annealing process
Product, so as to very big shortened process, reduces production cost.
For this purpose, the solution taken by the present invention is：
A kind of production method of the efficient electrical sheet of No yield point, it is characterised in that：
1st, technological process is：Desulfurizing iron pretreatment → converter smelting calmness tapping → sheet billet continuous casting is nothing electromagnetic agitation → heating
Hot rolling → pickling and cold-rolling → finished product heat treatment decarburization → inspection is dispatched from the factory.
It is low that silicon steel product leads warm heat conduction parameter, and strand columnar structure is flourishing, i.e. original (100) texture component of strand is high；According to
According to microstructure texture heredity and development law, during finished product is heat-treated deep decarbonization process, then carbon spread power is relied on, enter
One step promotes (100) texture component to generate, and obtains favorable texture component and the feature for being conducive to electromagnetic performance.Therefore smelt
During eliminate electromagnetic agitation in refinery practice and casting process.
2nd, control composition is：C >=0.035%, Si≤2.0%, Als≤1.0%.
3rd, hot rolling technology：1000～1200 DEG C of heating-up temperature, start rolling temperature >=1000 DEG C, finishing temperature >=800 DEG C, volume
Qu Wendu >=600 DEG C.
4th, cold-rolling process：Surface roughness norm controlling is at 0.65～3.00 μm, deeply de- with heat treatment process after increase
The specific surface area of carbon carbon reaction, improves decarburization efficiency.
5th, Technology for Heating Processing：
Deep carbonization treatment：Unit decarbonization section be before one-part form annealing unit soaking zone 2/3 or two-period form continuous annealing unit first equal
Hot arc, is passed through humidification gas, and at 20～45 DEG C, atmosphere is that >=15% hydrogen is mixed for two kinds with≤85% nitrogen for dew point D.P control
Close gas composition；Reduction section is 1/3 or the second soaking zone of two-period form continuous annealing unit after one-part form annealing unit soaking zone, leads to
Enter dry-mixing gas, at≤10 DEG C, atmosphere is >=15% hydrogen and two kinds of mixed gas groups of≤85% nitrogen for dew point D.P control
Become.
Plate temperature control system：The thermodynamics necessary condition of consideration decarburization, carbon are in diffusion property and matrix silicon, the alumina of each phase region
Change impact of the film generation to decarburization, therefore design decarbonization section temperature is 760～950 DEG C, principle is carbon, silicon, aluminium content are high
By ceiling temperature adjust.Reduction section temperature control improves surface oxidation state at 800～1050 DEG C, reaches design and produces
Product electromagnetic performance.
Process section speeds control：According to heat-treatment furnace length (continuous annealing unit process section length), it is to ensure decarburization and reduction institute
Take time, thus be designed as 50～120m/min；
Controling of the pressure of the oven：" fresh " of atmosphere is contacted by guarantee plate face decarburization and reduction reaction, promotes the forward direction of reaction to carry out,
Stove tail burner pressure reduction is determined on the basis of 1～3Pa of conventional products, improve 3～7Pa.
Beneficial effects of the present invention are：
Compared with the prior art, present invention eliminates electromagnetic agitation in refinery practice and casting process, and hot rolled coil is not carried out
Normalizing treatment, but produce the efficient electrical steel product of low iron loss, high magnetic strength by the deep decarburization in annealing process, so as to can
Shortened process, simplifies operation, reduces production cost, and ton steel cost reduces by 400～800 yuan, is conducive to discharging each operation
Production capacity, realizes the green idea of high efficiency production high efficiency products.
Specific embodiment
The integrated artistic flow process of the present invention is：Desulfurizing iron pretreatment → converter smelting calmness tapping → sheet billet continuous casting is nothing electromagnetism
Stirring → heating hot rolling → pickling and cold-rolling → finished product heat treatment decarburization → inspection is dispatched from the factory.
Embodiment 1：Typical trade mark 50AW800H high efficiency products.
Smelt Composition Control：C：0.045%；Si：0.83%；Als：0.21%；
Hot rolling technology controls：1135 DEG C of heating-up temperature；1010 DEG C of finish rolling start rolling temperature；860 DEG C of finish rolling finishing temperature；Batch
720 DEG C of temperature.
Cold-rolling process controls：Cold-reduced sheet roughness controls at 1.45 μm.
Technology for Heating Processing：Produced using one-part form continuous annealing furnace, protective atmosphere mixes (hydrogen 25%+ nitrogen 75%) for hydrogen nitrogen；
1/3 position dew point of soaking zone is 30 DEG C (measurement point), and soaking zone rear portion dew point of atmosphere is 0 DEG C；2/3 section of plate before soaking zone
Temperature is average 840 DEG C, 850 DEG C of 1/3 average out to afterwards, stove tail and burner pressure differential target 8Pa；Process section speed 110m/min；
Finished product carbon is 0.0023%.
The efficient electrical sheet of the produced No yield point of embodiment 1, after testing, core loss value P15 is 4.63W/kg；Magnetic strength B5000 is
1.758T.
Embodiment 2：Typical trade mark 50AW350H product.
Smelt Composition Control：C：0.039%；Si：2.25～2.40%；Als：0.35～0.50%.
Hot rolling technology controls：1121 DEG C of heating-up temperature；990 DEG C of finish rolling start rolling temperature；850 DEG C of finish rolling finishing temperature；Batch
690 DEG C of temperature.
Cold-rolling process controls：Cold-reduced sheet roughness controls at 1.56 μm.
Technology for Heating Processing：Produced using two-period form continuous annealing furnace.One soaking zone protective atmosphere mixes (hydrogen 30%+ for hydrogen nitrogen
Nitrogen 70%)；One soaking zone, 1/3 position dew point is 32 DEG C, and two soaking zone dew point of atmosphere are 0 DEG C；One soaking zone plate temperature is average
900 DEG C, two 930 DEG C of soaking zone plate temperature average out to, stove tail and burner pressure differential target 9Pa；Process section speed 75m/min；
Finished product carbon is 0.0021%.
The efficient electrical sheet of the produced No yield point of embodiment 2, after testing, core loss value is 2.78W/kg；Magnetic strength sense B5000 is 1.727T.
Claims (1)
1. the production method of the efficient electrical sheet of a kind of No yield point, it is characterised in that：
(1) technological process is：Desulfurizing iron pretreatment → converter smelting calmness tapping → sheet billet continuous casting nothing electricity
Magnetic stirs → heats hot rolling → pickling and cold-rolling → finished product heat treatment decarburization → inspection and dispatches from the factory；
(2) control composition is：C >=0.035%, Si≤2.0%, Als≤1.0%；
(3) hot rolling technology：1000～1200 DEG C of heating-up temperature, start rolling temperature >=1000 DEG C, finish to gauge temperature
>=800 DEG C of degree, coiling temperature >=600 DEG C；
(4) cold-rolling process：Surface roughness norm controlling is at 0.65～3.00 μm；
(5) Technology for Heating Processing：
Deep carbonization treatment：Unit decarbonization section is 2/3 or two-period form continuous annealing before one-part form annealing unit soaking zone
The first soaking zone of unit, is passed through humidification gas, and at 20～45 DEG C, atmosphere is >=15% for dew point D.P control
Two kinds of mixed gas compositions of hydrogen and≤85% nitrogen；Reduction section is 1/3 after one-part form annealing unit soaking zone
Or the second soaking zone of two-period form continuous annealing unit, dry-mixing gas is passed through, dew point D.P controls at≤10 DEG C,
Atmosphere is two kinds of mixed gas compositions of >=15% hydrogen and≤85% nitrogen；
Plate temperature control system：Decarbonization section temperature be 760～950 DEG C, carbon, silicon, aluminium content high by ceiling temperature
Adjustment；Reduction section temperature control is at 800～1050 DEG C；
Process section speeds control：According to continuous annealing unit process section length, 50～120m/min is designed as；
Controling of the pressure of the oven：Stove tail burner pressure reduction improves 3～7Pa on the basis of conventional products.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510523627.XA CN106480282A (en) | 2015-08-24 | 2015-08-24 | Production method of non-oriented high-efficiency electrical steel |
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| CN201510523627.XA CN106480282A (en) | 2015-08-24 | 2015-08-24 | Production method of non-oriented high-efficiency electrical steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245564A (en) * | 2017-06-19 | 2017-10-13 | 武汉钢铁有限公司 | A kind of control method of non-orientation silicon steel internal oxidation layer |
| CN114717391A (en) * | 2022-04-15 | 2022-07-08 | 首钢集团有限公司 | Method for improving surface roughness of 780MPa and above strength level ultrahigh-strength steel |
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| JPS5677329A (en) * | 1979-11-27 | 1981-06-25 | Nippon Steel Corp | Production of composite structure high tensile cold-rolled steel plate of superior workability |
| CN102041449A (en) * | 2011-01-16 | 2011-05-04 | 首钢总公司 | Method for improving electromagnetic performance of oriented electric steel by low-temperature plate blank heating process |
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2015
- 2015-08-24 CN CN201510523627.XA patent/CN106480282A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5677329A (en) * | 1979-11-27 | 1981-06-25 | Nippon Steel Corp | Production of composite structure high tensile cold-rolled steel plate of superior workability |
| CN102041449A (en) * | 2011-01-16 | 2011-05-04 | 首钢总公司 | Method for improving electromagnetic performance of oriented electric steel by low-temperature plate blank heating process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245564A (en) * | 2017-06-19 | 2017-10-13 | 武汉钢铁有限公司 | A kind of control method of non-orientation silicon steel internal oxidation layer |
| CN107245564B (en) * | 2017-06-19 | 2019-01-25 | 武汉钢铁有限公司 | A kind of control method of non-orientation silicon steel internal oxidation layer |
| CN114717391A (en) * | 2022-04-15 | 2022-07-08 | 首钢集团有限公司 | Method for improving surface roughness of 780MPa and above strength level ultrahigh-strength steel |
| CN114717391B (en) * | 2022-04-15 | 2024-04-26 | 首钢集团有限公司 | Method for improving surface roughness of ultra-high strength steel with strength level of 780MPa and above |
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Application publication date: 20170308 |