CN104962815A - High magnetic induction oriented silicon steel and manufacturing method thereof - Google Patents
High magnetic induction oriented silicon steel and manufacturing method thereof Download PDFInfo
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- CN104962815A CN104962815A CN201510413191.9A CN201510413191A CN104962815A CN 104962815 A CN104962815 A CN 104962815A CN 201510413191 A CN201510413191 A CN 201510413191A CN 104962815 A CN104962815 A CN 104962815A
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 47
- 230000006698 induction Effects 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000000137 annealing Methods 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 48
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 238000005098 hot rolling Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 238000009749 continuous casting Methods 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 238000005097 cold rolling Methods 0.000 claims abstract description 13
- 238000003723 Smelting Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 36
- 239000000203 mixture Substances 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- 229910052739 hydrogen Inorganic materials 0.000 claims description 15
- 239000001257 hydrogen Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 238000002425 crystallisation Methods 0.000 claims description 13
- 230000008025 crystallization Effects 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims description 10
- 229910052717 sulfur Inorganic materials 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 229910052718 tin Inorganic materials 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract 1
- 238000002955 isolation Methods 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000007771 core particle Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000013532 laser treatment Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to high magnetic induction oriented silicon steel and a manufacturing method thereof. The silicon steel comprises the following components in percentage by mass: 0.01-0.08% of C, 2.8-3.4% of Si, 0.02-0.30% of Mn, 0.010-0.04% of S, 0.005-0.05% of Als, 0.003-0.010% of N, 0.005-0.5% of TI, 0-0.6% of Cu, 0-0.2% of Sn, less than 0.004% of O, less than 0.01% of P and the balance of Fe. The manufacturing method comprises the following steps: (1) smelting molten steel; (2) carrying out continuous casting by adopting a twin-roll strip continuous casting device to obtain a cast strip; (3) cooling and then carrying out hot rolling, and then cooling and coiling; (4) carrying out normalizing annealing on a hot rolled coil, and carrying out controlled cooling to room temperature; (5) carrying out acid washing and then cold rolling, then carrying out decarburizing, and coating an annealing isolation agent; (6) annealing at high temperature, and then carrying out purification annealing. The manufacturing method disclosed by the invention is simple and effective and has the characteristics of short process, easiness in control and low energy consumption; the silicon steel has excellent properties.
Description
Technical field
The invention belongs to electrical steel and manufacture field, be specifically related to a kind of high magnetic induction grain-oriented silicon steel and manufacture method thereof.
Background technology
Oriented silicon steel silicon content is about 3%(massfraction), be made up of single Gauss's orientation ({ 110}<001>) crystal grain, along roll very high to magnetic strength during magnetization, iron loss is very low, mainly for the production of transformer core; According to the height of magnetic strength, oriented silicon steel can be divided into common orientation silicon steel (CGO) and high magnetic induction grain-oriented silicon steel (Hi-B) two class, and the magnetic strength of high magnetic induction grain-oriented silicon steel is higher, iron loss is lower.
Current high magnetic induction grain-oriented silicon steel Production Flow Chart is: smelting → secondary refining and alloying → continuous casting → heating → hot rolling → normalizing → pickling → cold rolling → decarburizing annealing → apply with MgO are annealing separating agent → high temperature annealing → smooth stretching annealing → coating insulating layer → laser treatment → shearing, the packaging of main component; There is wretched insufficiency in current high magnetic induction grain-oriented silicon steel manufacture method: complex manufacturing, and Production Flow Chart is long, and cost is very high; In order to make the abundant solid solution of inhibitor, continuously cast bloom needs to heat in special-purpose high temperature process furnace, and the highest need of temperature reach 1400 DEG C, and because Heating temperature is high, scaling loss serious, process furnace needs frequent repairing, and utilization ratio is very low; Meanwhile, also there is the shortcomings such as product defects is many, lumber recovery is low, energy consumption is large, environmental pollution is serious in current manufacture method; Along with the objective demand of energy-saving and emission-reduction is more urgent, how to simplify high magnetic induction grain-oriented silicon steel production technique, reduce energy consumption, decreasing pollution, reduces costs, and becomes the target that metallargist pursues.
Summary of the invention
The object of this invention is to provide a kind of high magnetic induction grain-oriented silicon steel and manufacture method thereof, by the advantage and potential of twin-roll thin strip continuous casting technology in the regulation and control of oriented silicon steel tissue, texture and inhibitor, adopt new chemical composition design, obtain high magnetic induction oriented silicon steel, there is the feature of technique short route, easy to control, less energy-consumption simultaneously.
The composition of high magnetic induction grain-oriented silicon steel of the present invention is by mass percentage: C 0.01 ~ 0.08%, Si 2.8 ~ 3.4%, Mn 0.02 ~ 0.30%, S 0.010 ~ 0.04%, Als 0.005 ~ 0.05%, N 0.003 ~ 0.010%, Ti 0.005 ~ 0.5%, Cu 0 ~ 0.6%, Sn 0 ~ 0.2%, O<0.004%, P<0.01%, surplus is Fe.
The magnetic strength B of above-mentioned high magnetic induction grain-oriented silicon steel
8be 1.88 ~ 1.94T.
The iron loss P of above-mentioned high magnetic induction grain-oriented silicon steel
17/50be 0.95 ~ 1.03W/kg.
The thickness of above-mentioned high magnetic induction grain-oriented silicon steel is at 0.20 ~ 0.35mm.
The manufacture method of high magnetic induction grain-oriented silicon steel of the present invention is carried out according to the following steps:
1, by set component smelting molten steel, composition is by mass percentage: C 0.01 ~ 0.08%, Si 2.8 ~ 3.4%, Mn 0.02 ~ 0.30%, S 0.01 ~ 0.04%, Als 0.005 ~ 0.05%, N 0.003 ~ 0.010%, Ti 0.005 ~ 0.5%, Cu 0 ~ 0.6%, Sn 0 ~ 0.2%, O<0.004%, P<0.01%, surplus is Fe;
2, twin-roll thin strip continuous casting device is adopted, molten steel is poured in the cavity that is made up of two crystallization rolls and two pieces of side seal boards through tundish and forms molten bath, controlling molten bath upper surface superheating temperature is 10 ~ 70 DEG C, molten steel in molten bath solidifies along with the rotation of crystallization roll and derives with the speed of 20 ~ 80m/min, obtains Cast Strip;
3, Cast Strip is through cooling unit to carry out hot rolling after the cooling of the speed of 20 ~ 100 DEG C/s, and start rolling temperature is 900 ~ 1150 DEG C, and hot rolling draft is 15 ~ 50%, and finishing temperature, more than 850 DEG C, is cooled to less than 650 DEG C with the speed of 20 ~ 100 DEG C/s after hot rolling and batches;
4, hot rolled coil is carried out one section of normalizing annealing or two sections of normalizing annealings; The temperature of one section of normalizing method is 900 ~ 1150 DEG C, and the time is 1 ~ 10min; The high temperature section temperature of two sections of normalizing methods is 1050 ~ 1150 DEG C, and the time is 1 ~ 5min, and the temperature of low-temperature zone is 900 ~ 1050 DEG C, and the time is 1 ~ 5min; Carry out controlled cooling model after normalizing process, speed of cooling is 5 ~ 50 DEG C/s, is cooled to normal temperature and obtains normalizing plate;
5, scale on surface is removed in the pickling of normalizing plate, then carry out cold rolling, cold rolling draft is 80 ~ 95%, then carries out decarburizing annealing, and temperature is 800 ~ 900 DEG C, and the time is 3 ~ 10min, then the plate surface coating annealing separating agent after decarburizing annealing;
6, the sheet material of coating annealing separating agent is heated to 800 ± 10 DEG C, then be warming up to 1200 ± 10 DEG C with the speed of 10 ~ 30 DEG C/h and complete high temperature annealing, at least 20h is incubated again at 1200 ± 10 DEG C, complete sublimate annealing, finally by uncoiling, smooth stretching annealing and insulation layer coating, make high magnetic induction grain-oriented silicon steel.
The width of above-mentioned Cast Strip is 100 ~ 2000mm.
In aforesaid method, the contact arc length of molten steel and crystallization roll roll surface is 100 ~ 250mm, and the height in molten bath is 80 ~ 220mm.
In aforesaid method, atmosphere during decarburizing annealing is the mixed atmosphere of hydrogen and nitrogen, and the volume percent of hydrogen is 50%, and the dew point of mixed gas is 20 ~ 45 DEG C.
In aforesaid method, atmosphere during high temperature annealing is the mixed atmosphere of hydrogen and nitrogen, and the volume percent of hydrogen is 75%, and atmosphere during sublimate annealing is hydrogen atmosphere.
Twin-roll thin strip continuous casting device with the cooling roller of two reverse rotations for crystallizer, by liquid metal direct production thin strip; Twin-roll thin strip continuous casting technology is a kind of short route, near-net-shape complete processing of rapid solidification and rolling deformation being combined together; The Sub realizable fuzzy matrix (10 utilizing it to have
2~ 10
4dEG C/s) characteristic, can obtain than conventional continuously cast bloom homogeneous, tiny initial solidification tissue more, be conducive to follow-up tissue, texture controlling; Under Sub realizable fuzzy matrix condition, the inhibitor forming element in Cast Strip can be made to be in solid solution condition, without the need to heat before hot rolling; Simultaneously, the Cast Strip thickness utilizing strip continuous casting technology to obtain is generally only 1 ~ 5mm, and much smaller than conventional thickness of strand (50 ~ 200mm), this can simplify hot-rolled process greatly, shorten Production Flow Chart and reduce energy consumption, being applied in oriented silicon steel production and there is unrivaled superiority.
The existing patent documentation of twin-roll thin strip continuous casting oriented silicon steel has the flat 6-31397 of CN102069167A, CN103255338A and Ben Te Open, these methods are only for preparation or the course of hot rolling of Cast Strip base, twin-roll thin strip continuous casting technology is not utilized to prepare high magnetic induction grain-oriented silicon steel production board, the not open whole technical process from smelting to finished product.
Feature of the present invention and beneficial effect are:
(1) in steel, appropriate Ti element is added, utilize its easily and nitrogen, sulphur etc. combine the feature forming high melting compound, this compounds is matched with Twin-roll Strip Continuous Casting, serve as the effect of heterogeneous forming core particle and pinning crystal boundary, the greatly solidified structure of refinement oriented silicon steel, effectively improve the moulding of material, tough performance, for the cold rolling process of following process process provides convenience;
(2) the Ti element added can also form Ti that is tiny, disperse when hot rolling and normalizing
2s, Ti
4c
2s
2deng precipitate, can together with AlN with MnS inhibiting grain growth, strengthen inhibition, be conducive to being formed tiny and uniform first crystal grain, thus acquisition high magnetic induction grain-oriented silicon steel;
(3) manufacture method is simple, effectively, has the feature of short route, easy to control, less energy-consumption.
Accompanying drawing explanation
Fig. 1 is the manufacture method schematic flow sheet of high magnetic induction grain-oriented silicon steel of the present invention.
Embodiment
Contact arc length in the embodiment of the present invention and comparative example is 100 ~ 250mm, and the height in molten bath is 80 ~ 220mm.
The annealing separating agent adopted in the embodiment of the present invention is MgO.
The crystallization roll diameter of the double roller continuous casting device adopted in the embodiment of the present invention and comparative example is 500 ~ 1000mm.
The width of the Cast Strip obtained in the embodiment of the present invention and comparative example is 100 ~ 2000mm.
In the embodiment of the present invention and comparative example, the magnetic property data of product adopt monolithic testing method to test to obtain on MATS-2010M type magnetism testing instrument.
Atmosphere in the embodiment of the present invention during decarburizing annealing is the mixed atmosphere of hydrogen and nitrogen, and the volume percent of hydrogen is 50%, and the dew point of mixed gas is 20 ~ 45 DEG C.
Atmosphere in the embodiment of the present invention during high temperature annealing is the mixed atmosphere of hydrogen and nitrogen, and the volume percent of hydrogen is 75%, and atmosphere during sublimate annealing is hydrogen atmosphere.
Embodiment 1
The molten steel composition of high magnetic induction grain-oriented silicon steel according to mass percent is: C 0.06%, Si 3.1%, Mn 0.20%, S 0.025%, Als 0.02%, N 0.009%, Ti 0.07%, O<0.004%, P<0.01%, and surplus is Fe; Magnetic strength B
8for 1.94T; Iron loss P
17/50for 0.95W/kg; Thickness 0.27mm;
Manufacture method is carried out according to following steps:
By set component smelting molten steel, composition is the same;
Adopt twin-roll thin strip continuous casting device, molten steel is poured in the cavity that is made up of two crystallization rolls and two pieces of side seal boards through tundish and forms molten bath, controlling molten bath upper surface superheating temperature is 40 DEG C, and the molten steel in molten bath solidifies along with the rotation of crystallization roll and derives with the speed of 20m/min, obtains Cast Strip;
Cast Strip is through cooling unit to carry out hot rolling after the cooling of the speed of 20 DEG C/s, and start rolling temperature is 1100 DEG C, and hot rolling draft is 34.4%, and finishing temperature, more than 850 DEG C, is cooled to less than 650 DEG C with the speed of 20 DEG C/s after hot rolling and batches;
Hot rolled coil is carried out one section of normalizing annealing, temperature is 1100 DEG C, and the time is 5min; Carry out controlled cooling model after normalizing process, speed of cooling is 25 DEG C/s, is cooled to normal temperature and obtains normalizing plate;
Scale on surface is removed in the pickling of normalizing plate, and then carry out cold rolling, cold rolling draft is 85%, then carries out decarburizing annealing, and temperature is 850 DEG C, and the time is 6min, then the plate surface coating annealing separating agent after decarburizing annealing;
The sheet material of coating annealing separating agent is heated to 800 ± 10 DEG C, then be warming up to 1200 ± 10 DEG C with the speed of 15 DEG C/h and complete high temperature annealing, then at 1200 ± 10 DEG C of insulation 20h, complete sublimate annealing, finally by uncoiling, smooth stretching annealing and insulation layer coating, make high magnetic induction grain-oriented silicon steel;
Adopt the steel plate of heterogeneity to carry out contrast experiment as stated above, molten steel composition according to mass percent is: C 0.04%, Si 3.0%, Mn 0.01%, S 0.10%, Als 0.02%, N 0.02%, O<0.004%, P<0.01%, surplus is Fe; Method is the same, the product magnetic strength B of acquisition
8for 1.85T; Iron loss P
17/50for 1.27W/kg.
Embodiment 2
The molten steel composition of high magnetic induction grain-oriented silicon steel according to mass percent is: C 0.01%, Si 2.8%, Mn 0.02%, S 0.025%, Als 0.005%, N 0.003%, Ti 0.5%, Cu 0.3%, Sn 0.1%, O<0.004%, P<0.01%, surplus is Fe; Magnetic strength B
8for 1.91T; Iron loss P
17/50for 0.97W/kg; Thickness 0.20mm;
By set component smelting molten steel, composition is the same;
Adopt twin-roll thin strip continuous casting device, molten steel is poured in the cavity that is made up of two crystallization rolls and two pieces of side seal boards through tundish and forms molten bath, controlling molten bath upper surface superheating temperature is 10 DEG C, and the molten steel in molten bath solidifies along with the rotation of crystallization roll and derives with the speed of 50m/min, obtains Cast Strip;
Cast Strip is through cooling unit to carry out hot rolling after the cooling of the speed of 60 DEG C/s, and start rolling temperature is 900 DEG C, and hot rolling draft is 15%, and finishing temperature, more than 850 DEG C, is cooled to less than 650 DEG C with the speed of 60 DEG C/s after hot rolling and batches;
Hot rolled coil is carried out one section of normalizing annealing, temperature is 900 DEG C, and the time is 10min; Speed of cooling after normalizing process is 5 DEG C/s, is cooled to normal temperature and obtains normalizing plate;
Scale on surface is removed in the pickling of normalizing plate, and then carry out cold rolling, cold rolling draft is 80%, then carries out decarburizing annealing, and temperature is 800 DEG C, and the time is 10min, then the plate surface coating annealing separating agent after decarburizing annealing;
The sheet material of coating annealing separating agent is heated to 800 ± 10 DEG C, then be warming up to 1200 ± 10 DEG C with the speed of 10 DEG C/h and complete high temperature annealing, then at 1200 ± 10 DEG C of insulation 24h, complete sublimate annealing, finally by uncoiling, smooth stretching annealing and insulation layer coating, make high magnetic induction grain-oriented silicon steel;
The steel plate of heterogeneity is adopted to carry out contrast experiment as stated above, molten steel composition according to mass percent is: C 0.02%, Si 3.5%, Mn 0.25%, S 0.03%, Als 0.15%, N 0.009%, Ti 0.09%, O<0.004%, P<0.01%, surplus is Fe; Method is the same, the product magnetic strength B of acquisition
8for 1.80T; Iron loss P
17/50for 1.22W/kg.
Embodiment 3
The molten steel composition of high magnetic induction grain-oriented silicon steel according to mass percent is: C 0.08%, Si 3.4%, Mn 0.30%, S 0.03%, Als 0.05%, N 0.01%, Ti 0.005%, Cu 0.6%, Sn 0.2%, O<0.004%, P<0.01%, surplus is Fe; Magnetic strength B
8for 1.88T; Iron loss P
17/50for 1.03W/kg; Thickness 0.23mm;
By set component smelting molten steel, composition is the same;
Adopt twin-roll thin strip continuous casting device, molten steel is poured in the cavity that is made up of two crystallization rolls and two pieces of side seal boards through tundish and forms molten bath, controlling molten bath upper surface superheating temperature is 70 DEG C, and the molten steel in molten bath solidifies along with the rotation of crystallization roll and derives with the speed of 80m/min, obtains Cast Strip;
Cast Strip is through cooling unit to carry out hot rolling after the cooling of the speed of 100 DEG C/s, and start rolling temperature is 1150 DEG C, and hot rolling draft is 50%, and finishing temperature, more than 850 DEG C, is cooled to less than 650 DEG C with the speed of 100 DEG C/s after hot rolling and batches;
Hot rolled coil is carried out one section of normalizing annealing, temperature is 1150 DEG C, and the time is 1min; Speed of cooling after normalizing process is 50 DEG C/s, is cooled to normal temperature and obtains normalizing plate;
Scale on surface is removed in the pickling of normalizing plate, and then carry out cold rolling, cold rolling draft is 95%, then carries out decarburizing annealing, and temperature is 900 DEG C, and the time is 3min, then the plate surface coating annealing separating agent after decarburizing annealing;
The sheet material of coating annealing separating agent is heated to 800 ± 10 DEG C, then be warming up to 1200 ± 10 DEG C with the speed of 30 DEG C/h and complete high temperature annealing, then at 1200 ± 10 DEG C of insulation 22h, complete sublimate annealing, finally by uncoiling, smooth stretching annealing and insulation layer coating, make high magnetic induction grain-oriented silicon steel;
Adopt the steel plate of heterogeneity to carry out contrast experiment as stated above, molten steel composition according to mass percent is: C 0.07%, Si 2.9%, Mn 0.01%, S 0.06%, Als 0.1%, N 0.02%, Cu 0.3%, O<0.004%, P<0.01%, surplus is Fe; Method is the same, the product magnetic strength B of acquisition
8for 1.84T; Iron loss P
17/50for 1.24W/kg.
Embodiment 4
The molten steel composition of high magnetic induction grain-oriented silicon steel with embodiment 1, magnetic strength B
8for 1.92T; Iron loss P
17/50for 0.98W/kg;
Manufacture method is with embodiment 1, and difference is: adopt two sections of normalizing methods to carry out normalizing annealing, wherein high temperature section temperature is 1100 DEG C, and the time is 3min, and the temperature of low-temperature zone is 1000 DEG C, and the time is 3min; Carry out controlled cooling model after normalizing process, speed of cooling is 30 DEG C/s.
Embodiment 5
The molten steel composition of high magnetic induction grain-oriented silicon steel with embodiment 2, magnetic strength B
8for 1.89T; Iron loss P
17/50for 1.00W/kg;
Manufacture method is with embodiment 2, and difference is: adopt two sections of normalizing methods to carry out normalizing annealing, wherein high temperature section temperature is 1050 DEG C, and the time is 5min, and the temperature of low-temperature zone is 900 DEG C, and the time is 5min; Carry out controlled cooling model after normalizing process, speed of cooling is 5 DEG C/s.
Embodiment 6
The molten steel composition of high magnetic induction grain-oriented silicon steel with embodiment 3, magnetic strength B
8for 1.90T; Iron loss P
17/50for 0.98W/kg;
Manufacture method is with embodiment 3, and difference is: adopt two sections of normalizing methods to carry out normalizing annealing, wherein high temperature section temperature is 1150 DEG C, and the time is 1min, and the temperature of low-temperature zone is 1050 DEG C, and the time is 1min; Carry out controlled cooling model after normalizing process, speed of cooling is 50 DEG C/s.
Claims (6)
1. a high magnetic induction grain-oriented silicon steel, is characterized in that composition is by mass percentage: C 0.01 ~ 0.08%, Si 2.8 ~ 3.4%, Mn 0.02 ~ 0.30%, S 0.010 ~ 0.04%, Als 0.005 ~ 0.05%, N 0.003 ~ 0.010%, Ti 0.005 ~ 0.5%, Cu 0 ~ 0.6%, Sn 0 ~ 0.2%, O<0.004%, P<0.01%, surplus is Fe; Magnetic strength B
8be 1.88 ~ 1.94T; Iron loss P
17/50be 0.95 ~ 1.03W/kg.
2. a kind of high magnetic induction grain-oriented silicon steel according to claim 1, is characterized in that the thickness of this silicon steel is at 0.20 ~ 0.35mm.
3. a manufacture method for high magnetic induction grain-oriented silicon steel according to claim 1, is characterized in that carrying out according to the following steps;
(1) by set component smelting molten steel, composition is by mass percentage: C 0.01 ~ 0.08%, Si 2.8 ~ 3.4%, Mn 0.02 ~ 0.30%, S 0.01 ~ 0.04%, Als 0.005 ~ 0.05%, N 0.003 ~ 0.010%, Ti 0.005 ~ 0.5%, Cu 0 ~ 0.6%, Sn 0 ~ 0.2%, O<0.004%, P<0.01%, surplus is Fe;
(2) twin-roll thin strip continuous casting device is adopted, molten steel is poured in the cavity that is made up of two crystallization rolls and two pieces of side seal boards through tundish and forms molten bath, controlling molten bath upper surface superheating temperature is 10 ~ 70 DEG C, molten steel in molten bath solidifies along with the rotation of crystallization roll and derives with the speed of 20 ~ 80m/min, obtains Cast Strip;
(3) Cast Strip is through cooling unit to carry out hot rolling after the cooling of the speed of 20 ~ 100 DEG C/s, and start rolling temperature is 900 ~ 1150 DEG C, and hot rolling draft is 15 ~ 50%, and finishing temperature, more than 850 DEG C, is cooled to less than 650 DEG C with the speed of 20 ~ 100 DEG C/s after hot rolling and batches;
(4) hot rolled coil is carried out one section of normalizing annealing or two sections of normalizing annealings; The temperature of one section of normalizing method is 900 ~ 1150 DEG C, and the time is 1 ~ 10min; The high temperature section temperature of two sections of normalizing methods is 1050 ~ 1150 DEG C, and the time is 1 ~ 5min, and the temperature of low-temperature zone is 900 ~ 1050 DEG C, and the time is 1 ~ 5min; Carry out controlled cooling model after normalizing process, speed of cooling is 5 ~ 50 DEG C/s, is cooled to normal temperature and obtains normalizing plate;
(5) scale on surface is removed in the pickling of normalizing plate, then carry out cold rolling, cold rolling draft is 80 ~ 95%, then carries out decarburizing annealing, and temperature is 800 ~ 900 DEG C, and the time is 3 ~ 10min, then the plate surface coating annealing separating agent after decarburizing annealing;
(6) sheet material of coating annealing separating agent is heated to 800 ± 10 DEG C, then be warming up to 1200 ± 10 DEG C with the speed of 10 ~ 30 DEG C/h and complete high temperature annealing, at least 20h is incubated again at 1200 ± 10 DEG C, complete sublimate annealing, finally by uncoiling, smooth stretching annealing and insulation layer coating, make high magnetic induction grain-oriented silicon steel.
4. the manufacture method of high magnetic induction grain-oriented silicon steel according to claim 3, it is characterized in that the contact arc length of molten steel and crystallization roll roll surface in step (2) is 100 ~ 250mm, the height in molten bath is 80 ~ 220mm.
5. the manufacture method of high magnetic induction grain-oriented silicon steel according to claim 3, atmosphere when it is characterized in that decarburizing annealing in step (5) is the mixed atmosphere of hydrogen and nitrogen, and the volume percent of hydrogen is 50%, and the dew point of mixed gas is 20 ~ 45 DEG C.
6. the manufacture method of high magnetic induction grain-oriented silicon steel according to claim 3, atmosphere when it is characterized in that high temperature annealing in step (6) is the mixed atmosphere of hydrogen and nitrogen, and the volume percent of hydrogen is 75%, and atmosphere during sublimate annealing is hydrogen atmosphere.
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| CN105274427A (en) * | 2015-11-24 | 2016-01-27 | 武汉钢铁(集团)公司 | High-magnetic-induction oriented silicon steel and production method |
| CN106399819A (en) * | 2016-06-16 | 2017-02-15 | 马鞍山钢铁股份有限公司 | Oriented silicon steel and preparing method thereof |
| CN106566982A (en) * | 2016-10-26 | 2017-04-19 | 刘海华 | Preparing method for air cooling steel throat pipe liner plate |
| CN106935356A (en) * | 2017-03-31 | 2017-07-07 | 广东金禄科技股份有限公司 | A kind of Self-retaining electromagnet with being oriented to |
| CN107217198A (en) * | 2017-06-01 | 2017-09-29 | 东北大学 | A kind of method that rotation cube doubly oriented silicon steel is prepared based on thin strap continuous casting |
| CN107245647A (en) * | 2017-06-01 | 2017-10-13 | 东北大学 | The method that one kind prepares flourishing { 100 } plane texture non-orientation silicon steel thin belt based on thin strap continuous casting |
| CN107245646A (en) * | 2017-06-01 | 2017-10-13 | 东北大学 | A kind of preparation method of the circumferential high-magnetic induction, low-iron loss non-orientation silicon steel of plate face |
| CN107488815A (en) * | 2017-08-25 | 2017-12-19 | 包头钢铁（集团）有限责任公司 | A kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof |
| CN109628851A (en) * | 2018-12-04 | 2019-04-16 | 武汉钢铁有限公司 | A kind of normalizing production method of low temperature high magnetic induction grain-oriented silicon steel |
| CN113897543A (en) * | 2021-08-31 | 2022-01-07 | 中冶南方工程技术有限公司 | Non-oriented electrical steel and method of manufacture |
| CN114107619A (en) * | 2021-10-09 | 2022-03-01 | 山东那美新材料科技有限公司 | Production method of silicon steel ultra-thin strip with high magnetic induction and low iron loss |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274427A (en) * | 2015-11-24 | 2016-01-27 | 武汉钢铁(集团)公司 | High-magnetic-induction oriented silicon steel and production method |
| CN106399819B (en) * | 2016-06-16 | 2018-12-28 | 马鞍山钢铁股份有限公司 | A kind of orientation silicon steel and preparation method thereof |
| CN106399819A (en) * | 2016-06-16 | 2017-02-15 | 马鞍山钢铁股份有限公司 | Oriented silicon steel and preparing method thereof |
| CN106566982A (en) * | 2016-10-26 | 2017-04-19 | 刘海华 | Preparing method for air cooling steel throat pipe liner plate |
| CN106935356A (en) * | 2017-03-31 | 2017-07-07 | 广东金禄科技股份有限公司 | A kind of Self-retaining electromagnet with being oriented to |
| CN107245647A (en) * | 2017-06-01 | 2017-10-13 | 东北大学 | The method that one kind prepares flourishing { 100 } plane texture non-orientation silicon steel thin belt based on thin strap continuous casting |
| CN107245646A (en) * | 2017-06-01 | 2017-10-13 | 东北大学 | A kind of preparation method of the circumferential high-magnetic induction, low-iron loss non-orientation silicon steel of plate face |
| CN107217198B (en) * | 2017-06-01 | 2018-10-09 | 东北大学 | A method of rotation cube doubly oriented silicon steel is prepared based on thin strap continuous casting |
| CN107217198A (en) * | 2017-06-01 | 2017-09-29 | 东北大学 | A kind of method that rotation cube doubly oriented silicon steel is prepared based on thin strap continuous casting |
| CN107488815A (en) * | 2017-08-25 | 2017-12-19 | 包头钢铁（集团）有限责任公司 | A kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof |
| CN109628851A (en) * | 2018-12-04 | 2019-04-16 | 武汉钢铁有限公司 | A kind of normalizing production method of low temperature high magnetic induction grain-oriented silicon steel |
| CN113897543A (en) * | 2021-08-31 | 2022-01-07 | 中冶南方工程技术有限公司 | Non-oriented electrical steel and method of manufacture |
| CN114107619A (en) * | 2021-10-09 | 2022-03-01 | 山东那美新材料科技有限公司 | Production method of silicon steel ultra-thin strip with high magnetic induction and low iron loss |
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