CN106399819A - Oriented silicon steel and preparing method thereof - Google Patents

Oriented silicon steel and preparing method thereof Download PDF

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CN106399819A
CN106399819A CN201610439336.7A CN201610439336A CN106399819A CN 106399819 A CN106399819 A CN 106399819A CN 201610439336 A CN201610439336 A CN 201610439336A CN 106399819 A CN106399819 A CN 106399819A
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temperature
rolling
annealing
silicon steel
nitrogen
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CN106399819B (en
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裴英豪
王立涛
施立发
裴陈新
夏雪兰
张振海
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Maanshan Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0257—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper

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  • Materials Engineering (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

The invention relates to oriented silicon steel and a preparing method thereof. The oriented silicon steel comprises, by weight, 0.030%-0.070% of C, 2.8%-3.5% of Si, 0.15%-0.30% of Mn, 0.35%-0.80% of Cu, 0.0040%-0.015% of S, 0.015%-0.025% of Als, 0.070%-0.015% of N, smaller than or equal to 0.020% of P, 0.002%-0.02% of Ti, and the balance Fe and inevitable impurities, wherein C/Ti is smaller than or equal to 10, and Cu/S is larger than or equal to 50. The preparing method comprises the steps of converter smelting, vacuum treatment, continuous casting, soaking pit heating, hot continuous rolling, first-time cold rolling, decarburization annealing, second-time cold rolling, MgO parting agent coating, high-temperature annealing and rewinding, the iron loss P1.7 of the oriented silicon steel is smaller than 1.18 W/kg, and the magnetic inductance B8 of the oriented silicon steel is larger than or equal to 1.86 T.

Description

A kind of orientation silicon steel and preparation method thereof
Technical field
The invention belongs to steel and iron manufacturing technical field, particularly to a kind of orientation silicon steel and preparation method thereof.
Background technology
In orientation silicon steel production process, for occurring position to organize it is necessary to obtain before final high annealing to accurate secondary recrystallization Obtain the inhibitor particle of small and dispersed, for obtaining the second phase particles of disperse, must adopt very high in hot rolling 2 Mo Steel Slab during Heating Process Heating-up temperature, coordinates very long heat time heating time, allows the abundant solid solution of thick second phase particles, then separates out in cold-rolled process. High-temperature heating can bring huge risk to firing equipment, will also result in energy consumption increase, lumber recovery loss, yield reduction etc. simultaneously Series of problems.Therefore in recent years orientation silicon steel production technology research is become using the second heating and enhancing inhibitor R＆D capability Focus.
United States Patent (USP) US 5653821 mentions a kind of plus 0.05%Ni and 0.05Cr, and to manganese sulfur than and copper sulfur ratio be controlled One kind is with Cu2S and AlN is the common orientation silicon steel production decision of inhibitor, and its strand is after 1250～1320 DEG C × 3h heating Hot rolling, hot rolled plate after pickling once cold rolling to 0.60～0.75mm, after 830 DEG C of decarburizations, secondary cold-rolling to 0.30mm, then Through recovery annealing, apply MgO coating, control firing rate to obtain product to 1200 DEG C of soaking 20h, due to needing to carry out Recovery annealing, therefore production process are relatively many.
In Russia, Yi Xiete metallurgical works adopts with Cu2Inhibitor based on S, supplemented by AIN.Strand composition is (wt%)：C： 0.03～0.05, Mn：0.2～0.25, Cu：0.4～0.6, Als：0.008～0.015, S：0.017～0.02, N：0.006～ 0.008, P<0.02.The new steel of Russia is also adopted by adopting with Cu2S and AlN is major inhibitors.Strand composition is (wt%)：C：0.03～ 0.05, Mn：0.2～0.25, Cu：0.4～0.6, Als：0.013～0.02, S：0.005～0.018, N：0.007～0.009, P<0.02, Ni：0.05, Cr：0.05.Two factory's technical processs are：Strand is through 1250～1280 DEG C of hot rollings, 900～930 DEG C of finish to gauges； Carried out cold rolling using secondary cold-rolling method；Intermediate anneal temperature is 830 DEG C, in 5 wet～10%H2+N2Carry out decarburization in atmosphere. Wherein, in 10%H after second cold rolling (reduction ratio is 55～65%)2+N2、PH2O/PH2Carry out in=0.6～0.7 atmosphere 550～650 DEG C of recovery annealing；Apply MgO, carry out high annealing (Li Shide, Niu Linxia. Russian electrical sheet reduces cost work Skill measures analysis [J]. electrical sheet, 2000 (2):23-25).This technique there is also the defect needing to carry out recovery annealing.
Chinese patent CN 103741031B proposes one kind and adopts CSP common orientation silicon steel containing vanadium and its manufacture Method, to increase inhibitor rejection ability using adding a certain amount of V (0.002～0.02%) in steel, thus obtaining P1.7＜ 1.28W/kg, B8The common orientation silicon steel of >=1.86T.Because sheet billet flow process Physical Metallurgy characteristic and traditional approach silicon steel produce stream By this qualitative difference, the therefore domestic at present ability still not possessing batch production, substantial amounts of research is still within technical research rank to journey Section.
When traditional slab flow process adopts low temperature slab heating technique to produce common orientation silicon steel, Cu2S is usually as main inhibitor, AlN As auxiliary inhibitor, to strengthen rejection ability.For improving rejection ability further, Mn, V etc. second phase generally also can be added Inhibitor forms the Grain Boundary Segregation element such as element and Sb, Sb.
Content of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of orientation silicon steel and preparation method thereof, oriented silicon of the present invention Steel, by the heating of appropriate Ti, forms the tiny carbonitride containing Ti, plays the effect of auxiliary inhibitor, improves suppression energy Power, omits common orientation silicon steel recovery annealing operation；In addition the intentionally adding of Ti content, can also reduce steelmaking process control difficult Degree, manufacture method reduces slab heating temperature and soaking time further, lowers energy consumption, improve production efficiency.
The technical solution used in the present invention is：
A kind of orientation silicon steel, with parts by weight count its raw material components and content as C0.030～0.070%, Si2.8～3.5%, Mn0.15～0.30%, Cu0.35～0.80%, S0.0040～0.015%, Als0.015～0.025%, N0.070～0.015%, P≤ 0.020%th, Ti0.002～0.02%, C/Ti≤10, Cu/S >=50, remaining is Fe and inevitable impurity；Preferably P≤0.015%, S 0.0050～0.010%, Ti 0.0050～0.015%；
Effect in steel for each element is as follows：
C：Appropriate C to guarantee the austenite phase that there is proper ratio in course of hot rolling, in order to second phase particles in steel Solid solution, disperse educt in the hot rolling, therefore C content control between 0.030～0.070%；
Si：Si is to increase resistive element, is the most important alloying element of electrical sheet, for obtaining low iron loss, needs raising Si to contain Amount, but Si content increases, and magnetic strength B also can reduce, and Si makes material lattice distort in addition increases, and fragility increases, and hardness raises, Cold-rolling workability degenerates, and final products hardness and intensity height, and in punching poor performance, the therefore present invention, Si content controls Between 2.8～3.5%；
Mn、Al：The effect of its auxiliary inhibitor, too many Mn, Al can lead to the full solid solution of thick MnS, AlN in strand Temperature improves it is necessary to improve slab heating temperature, and easy final products produce line crystalline substance, deteriorate product magnetic, and therefore Mn is controlled Make to control in 0.15～0.30%, Al and be advisable between 0.015～0.025%；
P：In high Si steel, the Grain Boundary Segregation effect of P, the meeting easily brittle phenomenon of generation, severe exacerbation product number of bends, And raising product strength, and the increase of cold rolling difficulty, therefore P content needs control below 0.020%, are preferably controlled in 0.015% Below；
S：S content reduces, and inhibitor content is few, and rejection ability is not enough, and S content is high, and inhibitor size is big, will also result in suppression Ability processed reduces, therefore in the range of 0.0040～0.015%, it is possible to obtain good performance, preferably 0.0050～0.010%；
N：N with S is similar, controls between 0.070～0.015%；
Ti：Ti is usually used in micro alloyed steel forming TiC and Ti (CN) to improve the intensity of steel, as auxiliary inhibitor in the present invention, By forming tiny second phase particles containing Ti, rejection ability not only can be strengthened, can also reduce in steelmaking process is to control The control difficulty that Ti content is brought in reduced levels.
Cu：As main inhibitor, primarily form tiny Cu2S、Cu1.8S, Cu content is less than 0.35% and is higher than 0.80%, It is difficult to secondary recrystallization, properties of product deteriorate；
Ti/C≤50 and Cu/S >=70 than primarily to control the content of inhibitor and size it is ensured that product final occur perfect Secondary recrystallization.
This magnetic property of oriented silicon steel：Iron loss P1.7＜ 1.18W/kg, magnetic strength B8≥1.87T.
A kind of preparation method of orientation silicon steel, step includes：Converter smelting → application of vacuum → continuous casting → soaking stove heat → heat is even Roll → cold rolling for the first time → decarburizing annealing → secondary cold-rolling → painting MgO interleaving agent → high annealing → rewinding, specially：
1) it is casting continuously to form 210～250mm strand by after molten iron pretreatment, pneumatic steelmaking, application of vacuum；Tight in vacuum process Prohibit oxygen blast, to control inclusion content；
2) strand enters stokehold temperature control more than 150 DEG C, and by heating strand to 1200～1350 DEG C, time inside furnace is more than 250min, The effective temperature retention time of wherein 1250～1320 DEG C temperature is more than 80min；
3) by strand through 3 passages, 5 passages or 7 passage hot rollings, obtain base in the middle of 30～50mm；Finish rolling, start rolling temperature control System more than 1050 DEG C, finish rolling finishing temperature controls between 890～1000 DEG C, oiler temperature control between 500～600 DEG C, Smart outgoing gauge is between 2.0～2.5mm；
4) hot rolling raw material carries out for the first time cold rolling after pickling, and THICKNESS CONTROL is between 0.60～0.80mm；
5) once cold rolling volume carries out decarburizing annealing, and decarburization annealing temperature is between 800～850 DEG C it is ensured that steel plate is in this humidity province Between more than 5min temperature retention time, to complete decarburization and to form Si2The oxidation layer film of O；Decarburizing annealing dew point controls at 30 DEG C More than, protective atmosphere is nitrogen and hydrogen mixture, wherein H2Volume content is between 10～20%；After decarburizing annealing, C content controls Less than 0.0050%；
6) coil of strip after decarburizing annealing carries out secondary cold-rolling to product final thickness；
7) secondary roll hard coil coating MgO interleaving agent and be dried；
8) high annealing obtains finished product：Coil of strip is heated rapidly to 600～680 DEG C, is incubated 2～5h, then with the speed of 20～30 DEG C/h Degree is heated to being incubated 15～20h between 1170～1230 DEG C, is subsequently cooled to 450 DEG C of insulation 2h and comes out of the stove；Quick bringing-up section shielding gas Body is nitrogen, is slowly heated to 950 DEG C and uses nitrogen and hydrogen mixture, N before2Percent by volume 10～30%；950 DEG C to holding stage, Being incubated to being cooled to 800 DEG C of stage protective gas is hydrogen；800 DEG C～450 DEG C cooling stages adopt nitrogen and hydrogen mixture, N2Volume hundred Divide ratio 10～30%；450 DEG C of insulations are using nitrogen protection；
9) remove coil of strip surface interleaving agent, coating applies insulating barrier, then dry and carry out in annealing furnace stretching and leveling, stretching is flat Whole temperature is 800～850 DEG C, and furnace atmosphere is nitrogen；
10) coil of strip is switched to required width and volume weight in re-reeler component.
Orientation silicon steel of the present invention passes through to increase Ti in steel, forms TiC, Ti (CN) inhibitor, and coordinates Cu2S、AlN、MnS Deng inhibitor, inhibitor rejection ability in steel is made to be improved, hot rolling heating-up temperature can be reduced between 1250 DEG C～1320 DEG C, Coordinate rational hot rolling technology, form, in steel, the second phase particles possessing enough rejection ability, product is through cold rolling twice, decarburization Annealing and high annealing, form position to accurate secondary recrystallization crystal grain, so that it is guaranteed that the electromagnetic performance of product.
After adding 0.0050～0.015% Ti, iron loss P of 0.30mm product1.7＜ 1.18W/kg, magnetic strength B8≥1.86T；0.27mm Iron loss P1.7＜ 1.15W/kg, magnetic strength B8≥1.86T.Reach the performance requirement of 30Q120 and 27Q120.
Brief description
Fig. 1 is the crystal grain phasor of the orientation silicon steel of embodiment 1 preparation
Specific embodiment
The chemical composition of each embodiment orientation silicon steel raw material (strand) is shown in Table 1
Embodiment 1
The step of preparation process of orientation silicon steel is as follows：
1) it is casting continuously to form 230mm strand by after molten iron pretreatment, pneumatic steelmaking, application of vacuum；
2) by heating strand to 1250 DEG C, time inside furnace 280min, effective temperature retention time 85min of wherein 1250 DEG C temperature；
3) by strand through 3 passage roughing, workpiece thickness 35mm, finish rolling start rolling temperature controls at 1080 DEG C, finish rolling finish to gauge temperature 950 DEG C of degree, 560 DEG C of coiling temperature, smart outgoing gauge is in 2.3mm；
4) hot rolling raw material carries out cold rolling, thickness 0.66mm for the first time after pickling；
5) once cold rolling is rolled up and is carried out decarburizing annealing, 830 DEG C of decarburization annealing temperature, 35 DEG C of dew point, decarburization soaking time 6min, Protective atmosphere is 10%H2+ 90%N2(percent by volume), C content 0.0021% after decarburization；
6) coil of strip after decarburizing annealing carries out secondary cold-rolling to 0.30mm；
7) secondary roll hard coil coating MgO interleaving agent and be dried；
8) coil of strip is heated rapidly to 650 DEG C, is incubated 2.5h, then 1180 DEG C of insulation 20h are heated to the speed of 20 DEG C/h, It is subsequently cooled to 450 DEG C of insulation 2h to come out of the stove；Quick bringing-up section protective gas is nitrogen, is slowly heated to 950 DEG C and uses nitrogen hydrogen before Gaseous mixture (75%H2+ 25%N2), 950 DEG C to holding stage, be incubated to be cooled to 800 DEG C of stage protective gas be hydrogen, 800 DEG C～450 DEG C of cooling stages adopt nitrogen and hydrogen mixture (75%H2+ 25%N2), 450 DEG C of insulations are using nitrogen protection；
9) remove coil of strip surface interleaving agent, coating applies insulating barrier, then dry and carry out in annealing furnace stretching and leveling, stretching is flat Whole temperature is 840 DEG C, and furnace atmosphere is nitrogen.
10) coil of strip is switched to required width and volume weight in re-reeler component.
Embodiment 2
The step of preparation process of orientation silicon steel is as follows：
1) steel of above-mentioned chemical composition is casting continuously to form after molten iron pretreatment, pneumatic steelmaking, application of vacuum 250mm strand；
2) by heating strand to 1280 DEG C, time inside furnace 370min, effective temperature retention time 110min of wherein 1280 DEG C temperature；
3) by strand through 5 passage roughing, workpiece thickness 45mm, finish rolling start rolling temperature controls at 1110 DEG C, finish rolling finish to gauge temperature 980 DEG C of degree, 550 DEG C of coiling temperature, smart outgoing gauge 2.3mm；
4) hot rolling raw material carries out cold rolling, thickness 0.70mm for the first time after pickling；
5) once cold rolling is rolled up and is carried out decarburizing annealing, 820 DEG C of decarburization annealing temperature, 40 DEG C of dew point, decarburization soaking time 8min, Atmosphere 15%H2+ 85%N2, C content 0.0025% after decarburization；
6) coil of strip after decarburizing annealing carries out secondary cold-rolling to product 0.30mm；
7) secondary roll hard coil coating MgO interleaving agent and be dried；
8) coil of strip is heated rapidly to 650 DEG C, is incubated 2h, then 1200 DEG C of insulation 18h are heated to the speed of 25 DEG C/h, It is subsequently cooled to 450 DEG C of insulation 2h to come out of the stove；Quick bringing-up section protective gas is nitrogen, is slowly heated to 950 DEG C and uses nitrogen hydrogen before Gaseous mixture (75%H2+25N2), 950 DEG C to holding stage, be incubated to be cooled to 800 DEG C of stage protective gas be hydrogen, 800 DEG C～450 DEG C of cooling stages adopt nitrogen and hydrogen mixture (75%H2+ 25%N2), 450 DEG C of insulations are using nitrogen protection；
9) remove coil of strip surface interleaving agent, coating applies insulating barrier, then dry and carry out in annealing furnace stretching and leveling, stretching is flat Whole temperature is 840 DEG C, and furnace atmosphere is nitrogen；
10) coil of strip is switched to required width and volume weight in re-reeler component.
Embodiment 3
The step of preparation process of orientation silicon steel is as follows：
1) steel of above-mentioned chemical composition is casting continuously to form after molten iron pretreatment, pneumatic steelmaking, application of vacuum 230mm strand；
2) by heating strand to 1300 DEG C, time inside furnace 410min, effective temperature retention time 125min of wherein 1300 DEG C temperature；
3) by strand through 3 passage roughing, workpiece thickness 35mm, finish rolling start rolling temperature controls at 1150 DEG C, finish rolling finish to gauge temperature 980 DEG C of degree, between 550 DEG C of coiling temperature, smart outgoing gauge 2.0mm；
4) hot rolling raw material carries out cold rolling, thickness 0.63mm for the first time after pickling；
5) once cold rolling is rolled up and is carried out decarburizing annealing, 830 DEG C of decarburization annealing temperature, 40 DEG C of dew point, decarburization soaking time 7min, Atmosphere 15%H2+N2, C content 0.0015% after decarburization；
6) coil of strip after decarburizing annealing carries out secondary cold-rolling to product 0.27mm；
7) secondary roll hard coil coating MgO interleaving agent and be dried；
8) coil of strip is heated rapidly to 650 DEG C, is incubated 3h, then 1200 DEG C of insulation 20h are heated to the speed of 25 DEG C/h, It is subsequently cooled to 450 DEG C of insulation 2h to come out of the stove；Quick bringing-up section protective gas is nitrogen, is slowly heated to 950 DEG C and uses nitrogen hydrogen before Gaseous mixture (75%H2+ 25%N2), 950 DEG C to holding stage, be incubated to be cooled to 800 DEG C of stage protective gas be hydrogen, 800 DEG C～450 DEG C of cooling stages adopt nitrogen and hydrogen mixture (75%H2+ 25%N2), 450 DEG C of insulations are using nitrogen protection；
9) remove coil of strip surface interleaving agent, coating applies insulating barrier, then dry and carry out in annealing furnace stretching and leveling, stretching is flat Whole temperature is 840 DEG C, and furnace atmosphere is nitrogen and hydrogen mixture；
10) coil of strip is switched to required width and volume weight in re-reeler component.
The test data of embodiment iron loss and magnetic strength is shown in Table 2.
Table 1
C Si Mn P S Als N Ti Cu Cu/S C/Ti
Embodiment 1 0.061 3.25 0.18 0.0091 0.0075 0.021 0.0075 0.0080 0.38 50 7.6
Embodiment 2 0.042 3.18 0.22 0.012 0.0085 0.019 0.0093 0.015 0.48 56 2.8
Embodiment 3 0.045 3.15 0.20 0.011 0.012 0.016 0.011 0.0072 0.70 58 6.25
Table 2

Claims (6)

1. a kind of orientation silicon steel, with parts by weight count its raw material components and content as C0.030～0.070%, Si2.8～3.5%, Mn0.15～0.30%, Cu0.35～0.80%, S0.0040～0.015%, Als0.015～0.025%, N0.070～0.015%, P≤ 0.020%th, Ti0.002～0.02%, C/Ti≤10, Cu/S >=50, remaining is Fe and inevitable impurity.
2. orientation silicon steel as claimed in claim 1 it is characterised in that：Described P≤0.015%, S 0.0050～0.010%, Ti 0.0050～0.015%.
3. a kind of preparation method of orientation silicon steel, step includes：Converter smelting → application of vacuum → continuous casting → soaking stove heat → heat Tandem rolling → cold rolling for the first time → decarburizing annealing → secondary cold-rolling → painting MgO interleaving agent → high annealing → stretching and leveling → rewinding, tool Body is：
1) it is casting continuously to form 210～250mm strand by after molten iron pretreatment, pneumatic steelmaking, application of vacuum；
2) strand enters stokehold temperature control more than 150 DEG C, and by heating strand to 1200～1350 DEG C, time inside furnace is more than 250min, The effective temperature retention time of wherein 1250～1320 DEG C temperature is more than 80min；
3) by strand through 3 passages, 5 passages or 7 passage hot rollings, obtain base in the middle of 30～50mm；Finish rolling, start rolling temperature control System more than 1050 DEG C, finish rolling finishing temperature controls between 890～1000 DEG C, oiler temperature control between 500～600 DEG C, Smart outgoing gauge is between 2.0～2.5mm；
4) hot rolling raw material carries out for the first time cold rolling after pickling, and THICKNESS CONTROL is between 0.60～0.80mm；
5) once cold rolling volume carries out decarburizing annealing；
6) coil of strip after decarburizing annealing carries out secondary cold-rolling to product final thickness；
7) secondary roll hard coil coating MgO interleaving agent and be dried；
8) high annealing obtains finished product.
4. preparation method as claimed in claim 3 it is characterised in that：Described step 5) in decarburization annealing temperature 800～850 It is ensured that steel plate is in the temperature retention time more than this temperature range 5min between DEG C, decarburizing annealing dew point controls more than 30 DEG C, Protective atmosphere is nitrogen and hydrogen mixture, wherein H2Volume content 10～20%, after decarburizing annealing, C content controls below 0.0050%.
5. preparation method as claimed in claim 3 it is characterised in that：Described step 8) high temperature anneal processing steps are： Coil of strip is heated rapidly to 600～680 DEG C, is incubated 2～5h, is then heated between 1170～1230 DEG C with the speed of 20～30 DEG C/h Insulation 15～20h, is subsequently cooled to 450 DEG C of insulation 2h and comes out of the stove；Quick bringing-up section protective gas is nitrogen, is slowly heated to 950 Use DEG C before nitrogen and hydrogen mixture, N2Percent by volume 10～30%；950 DEG C to holding stage, be incubated to being cooled to 800 DEG C of stages Protective gas is hydrogen；800 DEG C～450 DEG C cooling stages adopt nitrogen and hydrogen mixture, N2Percent by volume 10～30%；450 DEG C of guarantors Temperature is using nitrogen protection.
6. the preparation method as described in any one of claim 3-5 it is characterised in that：Also include step after the high-temperature anneal：Go Except coil of strip surface interleaving agent, coating applies insulating barrier, then dries and carries out stretching and leveling in annealing furnace, stretching and leveling temperature is 800～850 DEG C, furnace atmosphere is nitrogen；Coil of strip is cut in re-reeler group.
CN201610439336.7A 2016-06-16 2016-06-16 A kind of orientation silicon steel and preparation method thereof Active CN106399819B (en)

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CN107138525A (en) * 2017-05-02 2017-09-08 内蒙古包钢钢联股份有限公司 The method that think gauge silicon steel raw material is rolled into standard thickness cold-rolled products
CN107723590A (en) * 2017-09-28 2018-02-23 马钢(集团)控股有限公司 A kind of transformer cold-rolled orientation electrical sheet and its production method
CN114540714A (en) * 2022-02-28 2022-05-27 西北工业大学 Method for improving magnetic property of copper-containing oriented silicon steel
CN115478216A (en) * 2022-08-31 2022-12-16 安阳钢铁股份有限公司 Oriented silicon steel and preparation method thereof
CN115478145A (en) * 2022-09-24 2022-12-16 新万鑫（福建）精密薄板有限公司 Method for improving magnetic uniformity and production efficiency of oriented silicon steel
CN116121622A (en) * 2022-11-18 2023-05-16 无锡普天铁心股份有限公司 Production process of excellent bottom layer oriented silicon steel
CN114921711B (en) * 2022-05-25 2023-10-24 湖南华菱湘潭钢铁有限公司 Production method of Q620-grade high-corrosion-resistance high-strength offshore structural steel

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CN114717480B (en) * 2022-04-14 2023-03-03 无锡普天铁心股份有限公司 B 8 Moderate-temperature common oriented silicon steel with temperature not less than 1.90T and manufacturing method thereof

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CN103911545A (en) * 2014-04-14 2014-07-09 国家电网公司 Preparation method of electrical steel strip with strong goss texture occupation rate and high magnetic induction orientation
CN104962811A (en) * 2015-07-15 2015-10-07 东北大学 Double-roll thin-belt continuous casting fine crystal grain orientated silicon steel thin strip stock and manufacturing method of thin strip stock
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107138525A (en) * 2017-05-02 2017-09-08 内蒙古包钢钢联股份有限公司 The method that think gauge silicon steel raw material is rolled into standard thickness cold-rolled products
CN107723590A (en) * 2017-09-28 2018-02-23 马钢(集团)控股有限公司 A kind of transformer cold-rolled orientation electrical sheet and its production method
CN114540714A (en) * 2022-02-28 2022-05-27 西北工业大学 Method for improving magnetic property of copper-containing oriented silicon steel
CN114921711B (en) * 2022-05-25 2023-10-24 湖南华菱湘潭钢铁有限公司 Production method of Q620-grade high-corrosion-resistance high-strength offshore structural steel
CN115478216A (en) * 2022-08-31 2022-12-16 安阳钢铁股份有限公司 Oriented silicon steel and preparation method thereof
CN115478145A (en) * 2022-09-24 2022-12-16 新万鑫（福建）精密薄板有限公司 Method for improving magnetic uniformity and production efficiency of oriented silicon steel
CN115478145B (en) * 2022-09-24 2024-05-24 新万鑫（福建）精密薄板有限公司 Method for improving magnetic uniformity and production efficiency of oriented silicon steel
CN116121622A (en) * 2022-11-18 2023-05-16 无锡普天铁心股份有限公司 Production process of excellent bottom layer oriented silicon steel

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