CN108754338A - A kind of production technology of high-magnetic induction, low-iron loss orientation silicon steel - Google Patents

A kind of production technology of high-magnetic induction, low-iron loss orientation silicon steel Download PDF

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CN108754338A
CN108754338A CN201810446179.1A CN201810446179A CN108754338A CN 108754338 A CN108754338 A CN 108754338A CN 201810446179 A CN201810446179 A CN 201810446179A CN 108754338 A CN108754338 A CN 108754338A
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steel
rifle position
oxygen
rolling
orientation silicon
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CN108754338B (en
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张觉灵
曹喜军
杨海西
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Jingye Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
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    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
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    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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    • C21—METALLURGY OF IRON
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Abstract

A kind of production technology of high-magnetic induction, low-iron loss orientation silicon steel,Its ingredient is C 0.06-0.07 by percentage to the quality,Si 4.1-4.2,P≤0.01,Mn 0.06-0.12,S 0.02-0.03,The mass ratio of Mn/s is 4: 1,Al 0.010~0.050,N 0.003~0.020,Se 0.04~0.045,Ni 1.6~1.70,Cr 0.6~0.65,Cu 0.1~0.15,Sb 0.005~0.01,Sn 0.4~0.5,Bi 0.15~0.20,Mo 0.05~0.08,Nb 0.0010~0.010,V 0.1~0.15,Ti 0.05~0.08,Ta 0.1~0.15,Remaining is Fe and inevitable field trash,By molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → hot rolled plate annealing → cold rolling → subsequent processing,The size of MnS particles is 20-50nm in final products,The size of MnSe particles is 45-60nm,Cu2The size of S particles is 25-40nm, and secondary recrystallization grain size is 10-11mm, iron loss W17/50It is 0.78-0.82W/kg, B8It is 1.9-1.95T.

Description

A kind of production technology of high-magnetic induction, low-iron loss orientation silicon steel
Technical field
The invention belongs to field of iron and steel, and in particular to a kind of production technology of high-magnetic induction, low-iron loss orientation silicon steel.
Background technology
It is made steel with converter (or electric furnace), carries out double refining and alloying, be casting continuously to form slab, basic chemical composition is Si (2.5~4.5%), C (0.06~0.10%), Mn (0.03~0.1%) usually also contain in the elements such as Cu, Mo, Sb, B, Bi It is one or more, remaining be iron and inevitable impurity element；Slab is heated to 1350 DEG C in special-purpose high temperature heating furnace Above temperature, and kept the temperature, so that advantageous field trash MnS or AlN is fully dissolved, is then rolled, finishing temperature reaches 950 DEG C or more, quick water-spraying control is carried out to 500C hereinafter, then batching.So as to during subsequent normalizing in silicon steel base Tiny, disperse Second Phase Particles, i.e. inhibitor are precipitated in vivo；After Hot Rolled Plate Normalizing, pickling is carried out, removes surface oxidation iron Skin；Sample is rolled finished product thickness by cold rolling, carries out decarburizing annealing and coating with MgO annealing separating agents as main component, steel [C] in plate takes off the degree (generally should be in 30ppm or less) for not influencing finished product magnetism；In high-temperature annealing process, steel plate occurs Secondary recrystallization, magnesium silicate bottom form and purify physical chemistry such as (S, N in removing steel etc. are to magnetic harmful element) and become Change, obtains the high magnetic induction grain-oriented silicon steel that the degree of orientation is high, iron loss is low；Finally, it anneals by being coated with insulating coating and stretching, obtains quotient The oriented silicon steel of industry application form.
The industrialized production of general orientation silicon steel at present is realized using by inhibitor in control steel.It is so-called Inhibitor is primarily referred to as specific second phase particles in silicon steel, by the type, distribution, quantity and the ruler that control inhibitor in silicon steel It is very little, inhibit the growth of other crystal grain, realizes the secondary recrystallization of Goss crystal grain.Common inhibitor is mainly some compounds, Such as MnS, MnSe, AlN, some cyrystal boundary segregation elements, such as Sn, Bi, Pb, also can be used as auxiliary inhibitor.In general, in order to obtain The inhibitor such as MnS, MnSe, AlN are obtained, strand needs to carry out hot rolling, heating temperature again after carrying out high temperature, prolonged heat treatment It up to 1350-1450 DEG C, since strand is very thick, needs to keep the temperature for a long time, to ensure that strand temperature is uniform and inhibitor is complete Full solid solution obtains the inhibitor of small and dispersed distribution then by controlling the techniques such as hot rolling technology or hot rolled plate annealing in steel.
As resource-effectiveization, high performance demand are continuously improved, the requirement to orientation silicon steel is also constantly changing.
Invention content
The purpose of the present invention is to provide a kind of production methods of high magnetic induction grain-oriented silicon steel, by controlling product composition, life Production. art obtains specific inhibitor type, size and distribution, ensures stable and higher rejection ability, and to secondary The stringent control for recrystallizing average grain size, so as to obtain the orientation silicon steel that high magnetic strength, low iron loss and performance are stablized.
Technical solution is as follows：
A kind of production technology of high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is with quality percentage Than meter be C 0.06-0.07, Si 4.1-4.2, P≤0.01, Mn 0.06-0.12, S 0.02-0.03, Mn/s mass ratio be 4 : 1, Al 0.010~0.050, N 0.003~0.020, Se 0.04~0.045, Ni 1.6~1.70, Cr 0.6~0.65, Cu 0.1~0.15, Sb 0.005~0.01, Sn 0.4~0.5, Bi 0.15~0.20, Mo 0.05~0.08, Nb 0.0010~ 0.010, V 0.1~0.15, Ti 0.05~0.08, Ta 0.1~0.15, remaining is Fe and inevitable field trash, finally The size of MnS particles is 20-50nm in product, and the size of MnSe particles is 45-60nm, Cu2The size of S particles is 25-40nm, Secondary recrystallization grain size is 10-11mm, iron loss W17/50It is 0.78-0.82W/kg, B8It is 1.9-1.95T；
The production process route of orientation silicon steel is：Molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → Hot rolled plate annealing → cold rolling → subsequent processing；It is as follows：
(1) molten iron pre-processes；
(2) converter smelting：The mass ratio of molten iron and scrap steel block prepared by selecting step (1), molten iron and steel scrap is 8: 1, first plus useless Steel, rear hot metal charging first carry out de- P, and it is 3.1-3.2m to take off P stage speed of oxygen supply3/ (t*min), de- P stages account for oxygen supply total amount 35%, rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is supply oxygen total amount 15%, the oxygen supply of hypoxemia rifle position Amount is the 20% of oxygen supply total amount, and lime adding amount is 6-7kg/t steel, and it is 1.5-1.6 to take off P stage basicity, and de- P is added after terminating Lime stone, light dolomite mixture, lime stone, light dolomite mass ratio are 2.5: 1 in mixture, and mixture addition is 7kg/t steel turns back-slagging, and lime stone, which is added, to converter again later prepares to take off C, and it is 4.0- to take off C-stage speed of oxygen supply 4.1m3/ (t*min) accounts for the 65% of oxygen supply total amount, and rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is The 25% of total amount is supplied oxygen, hypoxemia rifle position oxygen-supplying amount is supply oxygen total amount 40%, and lime adding amount is 12-13kg/t steel, and converter is whole Point basicity is 3.8-3.9；Tapping temperature is 1600-1620 DEG C；Using floating plug, the double slag-stopping tappings of scum rod；Tapping process adds The lime of 5-5.5kg/t and the fluorite of 1.5-2kg/t make top slag；Wherein hyperoxia rifle position is H0× (1.4~1.5), hypoxemia rifle position For H0× (0.07~0.09), H0To turn molten steel in the stove face height；
(3) LF refining technique：The lime of the aluminum steel of 0.2kg/t, the fluorite of 0.6kg/t, 1kg/t is first added, first controls BOTTOM ARGON BLOWING Flow is adjusted to 210L/min in 450-460L/min after lime fusing, stops being powered after the complete white slag of clinker, makes white slag Target component：CaO 55%, SiO225%, Al2O314.5%, MgO 5%, FeO+Fe2O3+ MnO≤1.0%；It stirs energetically De- P, de- O, control BOTTOM ARGON BLOWING flow stir 12min in this case in 700-720L/min, control BOTTOM ARGON BLOWING flow later and exist 120-130L/min stirs 10-15min in this case, is once again powered up adjustment bath temperature convenient for tapping, soft blow stopping is blown Argon terminates LF refining；
(4) RH is refined：It is vacuumized under the conditions of not oxygen blown and carries out nature decarburization, promote Ar flow 800-850NL/min, carried out Dehydrogenation of Molten Steel ensures depth vacuum processing time >=12min, and the Al-Mg-Mn double deoxidizer removing steel of 0.01-0.03kg/t is added Then extra oxygen in water uses low-carbon ferromanganese, ferrosilicon and the conjunction containing Se, Ni, Cr, Cu, Sb, Sn, Bi, Mo, Nb, V, Ti, Ta Golden material to molten steel carry out alloying, composition adjustment complete after, it is desirable that vacuum processing time 6-7min, during which thermometric, take Sample, fine tuning composition；Vacuum terminates to carry out determining hydrogen；SiCa lines are fed per stove molten steel, and ensure that Ca contents are in 25~30ppm in molten steel Between, it is adjusted according to calcium content in steel；Soft blow is carried out to molten steel before bull ladle, soft blow argon flow amount is controlled in 50-60L/min, slag Face is not blown open, ensures molten steel soft blow time 12-13min；5-6min is stood after soft blow；
(5) continuous casting and rolling：It is produced with CSP continuous casting and rolling technique of sheet bar；Molten steel overheat control liquidus temperature add 15 to 20 DEG C, crystallization process uses non-sine mold oscillation curve and two cold curve hydraulic vibrations, the non-sine mold oscillation 200-250 times/s of curve vibration frequency, amplitude 2-3mm, pulling speed of continuous casting control is 2.7- in 3-4m/min, the control of crystallizer hot-fluid Specific water's control of 2.8mw/m2, continuous casting secondary cooling water are 1.85-1.9L/Kg, and control strand tapping temperature is 1230~1250 DEG C； It is 880~920 DEG C to control finishing temperature, and hot rolling plate thickness is 2-2.5mm；It is batched in 600-700 DEG C after section cooling, Batch it is offline after slowly cool to 280~320 DEG C with the cooling rate of≤10 DEG C/S after, then be quickly cooled down with >=30 DEG C/s, whole process is blown Argon is protected, and molten steel oxidation is avoided, and controls casting process nitrogen pick-up；Covering agent avoids the exposed selection low-carbon alloy of molten steel from protecting in Protect slag；
(6) hot rolled plate that hot rolled plate annealing is 2-2.5mm to the thickness of acquisition carries out hot rolled plate annealing, specifically in 1100- 1120 DEG C are kept for 30 seconds；
(7) cold rolling carries out once cold rolling with drafts 80-85% for the first time, carries out 1100-1120 DEG C later and keeps 30 seconds cold It rolls plate once to anneal, secondary cold-rolling is carried out with drafts 60-70% again later, obtains final cold rolling thin plate；
(8) subsequent processing carries out decarburizing annealing, decarburization annealing temperature in the moistening atmosphere of the arbitrary mixed proportions of wet type N2+H2 It it is 860-870 DEG C, annealing time is 60-70 seconds；Surface of steel plate after decarburizing annealing is coated with accounts for 80% interleaving agent for being with MgO, Secondary recrystallization is carried out, in turn, implements to keep 8 hours final annealings with 1180 DEG C of temperature in h 2 environments, orientation is made Silicon steel.
Further：The production technology of the high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is with matter Amount percentages be C 0.06, Si 4.1, P≤0.01, Mn 0.08, S 0.02, Mn/s mass ratio be 4: 1, Al 0.010, N 0.003、Se 0.04、Ni 1.6、Cr 0.6、Cu 0.1、Sb 0.005、Sn 0.4、Bi 0.15、Mo 0.05、Nb 0.001、V 0.1, Ti 0.05, Ta 0.1, remaining is Fe and inevitable field trash.
Further：The production technology of the high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is with matter Amount percentages be C 0.065, Si 4.15, P≤0.01, Mn 0.08, S 0.02, Mn/s mass ratio be 4: 1, Al 0.03, N 0.01、Se 0.043、Ni 1.65、Cr 0.62、Cu 0.12、Sb 0.008、Sn 0.45、Bi 0.18、Mo 0.07、Nb 0.005, V 0.12, Ti 0.06, Ta 0.12, remaining is Fe and inevitable field trash.
Further：The production technology of the high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is with matter Amount percentages be C 0.07, Si 4.2, P≤0.01, Mn 0.12, S 0.03, Mn/s mass ratio be 4: 1, Al 0.050, N 0.020、Se 0.045、Ni 1.70、Cr 0.65、Cu 0.15、Sb 0.01、Sn 0.5、Bi0.20、Mo0.08、Nb 0.010、 V 0.15, Ti 0.08, Ta 0.15, remaining is Fe and inevitable field trash.
Further：The production technology of the high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Step (6) hot rolled plate moves back The hot rolled plate that fire is 2.3mm to the thickness of acquisition carries out hot rolled plate annealing, is specifically kept for 30 seconds at 1120 DEG C；(7) cold rolling Once cold rolling is once carried out with drafts 82%, 1120 DEG C is carried out later and 30 seconds cold-reduced sheets is kept once to anneal, later again with Drafts 65% carries out secondary cold-rolling, obtains final cold rolling thin plate.
Compared with prior art, the technology of the present invention effect includes：
1, the present invention obtains high-magnetic induction, low-iron loss oriented silicon by precisely control product ingredient and specific production technology Steel, the size of MnS particles is 20-50nm in final products, and the size of MnSe particles is 45-60nm, and the size of Cu2S particles is 25-40nm, secondary recrystallization grain size are 10-11mm, and iron loss W17/50 is 0.78-0.82W/kg, and B8 is 1.9-1.95T.
2, it in the present invention, by being accurately controlled to alloying element, avoids and exchanges performance for increase alloy quantity It improves, has saved process costs, improved production efficiency.
3, the present invention by converter smelting process, molding casting, using technologies hands such as floating plug, the double slag-stopping tappings of scum rod The oxidisability or oxygen content of section reduction slag are to reduce the generation of field trash；Pass through LF refining technique, RH refining controlling blowing gas streams Amount, line feeding amount, the selection on opportunity reduce the condition of field trash formation, while positive inclusion floating being made to exclude.
Then, illustrate the restriction reason of the chemical composition of the present invention.Herein, mean weight percent about the % of ingredient Compare %.
C is very important element in iron and steel domain, directly determines the classification form of steel.Specifically in the orientation silicon steel of the present invention Middle C is clearance-type solid solution element, and slab γ-phase amount when hot rolling is heated is made to increase, and small and dispersed is precipitated in when Hot Rolled Plate Normalizing Carbide can promote first uniform small grains, ensure the stable development of secondary recrystallization；C can also improve heat, cold working Property, it prevents hot rolled plate from generating side and splits；C is to generate useful ingredient to Gauss orientation crystal grain, and effect needs contain in order to obtain Have 0.06% or more, and when C content < 0.06%, secondary recrystallization is unstable, while hot rolling and cold-rolling workability are bad, holds Cold rolling broken belt is easily caused, the abundant solid solution of the elements such as MnS is influenced, influences the stabilization of secondary recrystallization；However, if addition C is more than 0.07%, then it is unfavorable for subsequent decarburization.Therefore, the control based on intensity, crystallite dimension, decarbonization process, magnetic induction, low-iron loss, really Determine the range that C is 0.06-0.07%.Preferably 0.065%.
Si be improve steel resistivity, reduce iron loss needed for element be easy to implement at high warm to make ferrite stabilization Reason inhibits eddy current losses, at least needs 4.1% or more addition.However, if addition is more than 5%, steel hardening may be led Pyrogenicity roll during implosion and side split, while cold rolling processing can be made more difficult, nor conducive to control molten bath basicity, no Conducive to removing field trash, it is contemplated that the temperature of properties of product and cost-effective, therefore, Si are the range of 4.1-4.2%.It is preferred that It is 4.15%.
Mn is the effective ingredient of hot-workability to improving steel, and is with S, Se in conjunction with forming the precipitates such as MnS, MnSe and conduct The useful component that inhibitor works.Mn contents are very few, and MnS inhibitor is very little, and secondary recrystallization is unstable.But if Mn contents It is excessively high, MnS solid solubility temperatures can be improved, then the precipitates coarsening such as MnSe, lose the function as inhibitor, be unable to reach reduction The purpose of heating of plate blank.In addition, the Mn of certain content can improve hot rolling workability, hot-short generation is prevented.If however, Mn Content is less than 0.06%, then can not obtain said effect, on the other hand, if addition is thick more than precipitates such as 0.12%, MnSe Bigization loses the function as inhibitor.Therefore, Mn 0.06-0.12%.Preferably 0.08%.
Al forms AlN in steel, is the useful component that the effect of inhibitor is played as Dispersed Second Phase.If however, conduct The additive amount of sol.Al is then unable to fully ensure AlN amount of precipitations, therefore be unable to get said effect, another party less than 0.01% Face, if addition loses the effect as inhibitor more than 0.05%, AlN coarsenings.Therefore, 0.010~0.05% Al, it is excellent It is selected as 0.03%.
N is identical as Al, is to form the required ingredients of AlN.However, if N additive amounts are less than 0.003%, can not be formed Enough AlN, therefore said effect can not be obtained, on the other hand, if addition, in heating steel billet, can be produced more than 0.020% It gives birth to expansion etc. and causes surface defect.Therefore, N is 0.003~0.020%.Preferably 0.01%.
P is impurity element in conventional steel products, can improve the ratio of orientation silicon steel to a certain extent in orientation silicon steel Resistance and reduction iron loss.But excessively high P can influence the uniformity of MnS in hot rolled plate, to influence secondary recrystallization stability.Cause This, P≤0.01%.
S is displaced type solid solution element, and the MnS that S and Mn reacts and formed is the important inhibitor of orientation silicon steel, MnS precipitates Mainly primary recrystallization is had an impact, the zonal change to the grain growth of the primary recrystallization brought due to hot rolling It is dynamic inhibited.Suitably [Mn% × S%] is the basis for ensureing secondary recrystallization, if S too high levels, MnS in strand Excessively coarse, heating temperature improves, grain coarsening, hot rolling workability and magnetic reduction.Sulphur is excessively high simultaneously also makes desulfurization difficult.But If S contents are too low, MnS amount of precipitations are inadequate, and secondary recrystallization will be caused unstable.If S contents are less than 0.02%, cannot Fully obtain this effect.On the other hand, if Mn contents are more than 0.03%, magnetic characteristic is easy to decline.In addition the present invention is special Find that the size of MnS particles in final products when the mass ratio of Mn/s is 4: 1 is after being studied by the mass ratio to Mn/s 20-50nm can greatly improve inhibiting effect.Therefore, S 0.02-0.03%.Preferably 0.02%.
Se be with Mn, Cu in conjunction with and form MnSe, CuSe compound, and in steel as Dispersed Second Phase be precipitated and play inhibition The useful component of agent effect.However, if the total content of Se, less than 0.04%, additive effect is insufficient, on the other hand, if addition is super 0.045% is crossed, then solid solution when heating steel billet is incomplete, in addition, also becoming the reason of causing surface defect.Therefore, Se0.04 ~0.045%.Preferably 0.043%.
Ni is the element of traditional raising intensity, can also improve magnetism in orientation silicon steel, and have the effect of inhibition.Cause This Ni1.6~1.70%, preferably Ni 1.65%.
Cr：Appropriate Cr is added, the oxide of Cr can be formed in decarburization plate surface, the formation of follow-up glass-film and quality is promoted to carry It is high；But when more than 0.65%, decarburization is influenced, so that total oxygen demand when decarburization is difficult to control, and influence the stability of nitriding.Therefore, Cr0.6~0.65%.Preferably 0.62%.
Cu：Suitable Cu can form a certain amount of CuS inhibitor, be conducive to the stabilization of secondary recrystallization.But Cu too high levels When, CuS precipitations become thick, and restraint declines, and influences the effect of other inhibitor, it is bad to ultimately cause secondary recrystallization.Cause This, Cu 0.1~0.15%.Preferably 0.12%.
Mo and Sb：The stability of secondary recrystallization can be improved, but when content is more than certain value, the stability of secondary recrystallization is not It is further added by.Therefore Sb 0.005%~0.01, Mo 0.05~0.08%.It is preferred that Sb 0.008%, Mo 0.07%.
Sn：It is batching and, along crystal boundary segregation, is reinforcing restraint, cold rolling timeliness is effectively dissolved carbon when rolling and nitrogen quantity increases after normalizing It is more, so that first crystal grain more fine uniform after decarburization, secondary nucleus quantity is increased, reduces secondary recrystallization temperature, reduce two para-crystals Particle size.Sn too high levels, surface forms the oxide of excessive Sn when decarburization, influences follow-up nitriding efficiency.Therefore Sn 0.4~ 0.5%, preferably Sn 0.45%.
Bi, Ta are common alloying elements in orientation silicon steel field, can improve magnetic characteristic, therefore Bi 0.15~0.20%, Ta 0.1~0.15%, preferably Bi 0.18%, Ta 0.12%.
Nb, V, Ti are common alloying elements in orientation silicon steel field, can also form the precipitate containing N or C, improve intensity.This There is a little precipitates the growth for making crystal grain when final annealing to be homogenized independent of coiled material position, to inhibit orientation silicon steel Magnetic characteristic deviation effect.Therefore Nb 0.0010~0.010%, V 0.1~0.15%, Ti 0.05~0.08%, preferably Nb 0.005%, V 0.12%, Ti 0.06%.
Specific implementation mode
It elaborates to technical solution of the present invention below with reference to example embodiment.However, example embodiment can Implement in a variety of forms, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that The design of example embodiment more comprehensively and completely, and is comprehensively communicated to those skilled in the art by the present invention.
Embodiment 1
The production technology of high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is by percentage to the quality Be C 0.06, Si 4.1, P≤0.01, Mn 0.08, S 0.02, Mn/s mass ratio be 4: 1, Al 0.010, N 0.003, Se 0.04、Ni 1.6、Cr 0.6、Cu 0.1、Sb 0.005、Sn 0.4、Bi 0.15、Mo 0.05、Nb 0.001、V 0.1、Ti 0.05,0.1 Ta, remaining is Fe and inevitable field trash.
The production process route of orientation silicon steel is：Molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → Hot rolled plate annealing → cold rolling → subsequent processing；It is as follows：
(1) molten iron pre-processes；
(2) converter smelting：The mass ratio of molten iron and scrap steel block prepared by selecting step (1), molten iron and steel scrap is 8: 1, first plus useless Steel, rear hot metal charging first carry out de- P, and it is 3.1-3.2m to take off P stage speed of oxygen supply3/ (t*min), de- P stages account for oxygen supply total amount 35%, rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is supply oxygen total amount 15%, the oxygen supply of hypoxemia rifle position Amount is the 20% of oxygen supply total amount, and lime adding amount is 6-7kg/t steel, and it is 1.5-1.6 to take off P stage basicity, and de- P is added after terminating Lime stone, light dolomite mixture, lime stone, light dolomite mass ratio are 2.5: 1 in mixture, and mixture addition is 7kg/t steel turns back-slagging, and lime stone, which is added, to converter again later prepares to take off C, and it is 4.0- to take off C-stage speed of oxygen supply 4.1m3/ (t*min) accounts for the 65% of oxygen supply total amount, and rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is The 25% of total amount is supplied oxygen, hypoxemia rifle position oxygen-supplying amount is supply oxygen total amount 40%, and lime adding amount is 12-13kg/t steel, and converter is whole Point basicity is 3.8-3.9；Tapping temperature is 1600-1620 DEG C；Using floating plug, the double slag-stopping tappings of scum rod；Tapping process adds The lime of 5-5.5kg/t and the fluorite of 1.5-2kg/t make top slag；Wherein hyperoxia rifle position is H0× (1.4~1.5), hypoxemia rifle position For H0× (0.07~0.09), H0To turn molten steel in the stove face height；
(3) LF refining technique：The lime of the aluminum steel of 0.2kg/t, the fluorite of 0.6kg/t, 1kg/t is first added, first controls BOTTOM ARGON BLOWING Flow is adjusted to 210L/min in 450-460L/min after lime fusing, stops being powered after the complete white slag of clinker, makes white slag Target component：CaO 55%, SiO225%, Al2O314.5%, MgO 5%, FeO+Fe2O3+ MnO≤1.0%；It stirs energetically De- P, de- O, control BOTTOM ARGON BLOWING flow stir 12min in this case in 700-720L/min, control BOTTOM ARGON BLOWING flow later and exist 120-130L/min stirs 10-15min in this case, is once again powered up adjustment bath temperature convenient for tapping, soft blow stopping is blown Argon terminates LF refining；
(4) RH is refined：It is vacuumized under the conditions of not oxygen blown and carries out nature decarburization, promote Ar flow 800-850NL/min, carried out Dehydrogenation of Molten Steel ensures depth vacuum processing time >=12min, and the Al-Mg-Mn double deoxidizer removing steel of 0.01-0.03kg/t is added Then extra oxygen in water uses low-carbon ferromanganese, ferrosilicon and the conjunction containing Se, Ni, Cr, Cu, Sb, Sn, Bi, Mo, Nb, V, Ti, Ta Golden material to molten steel carry out alloying, composition adjustment complete after, it is desirable that vacuum processing time 6-7min, during which thermometric, take Sample, fine tuning composition；Vacuum terminates to carry out determining hydrogen；SiCa lines are fed per stove molten steel, and ensure that Ca contents are in 25~30ppm in molten steel Between, it is adjusted according to calcium content in steel；Soft blow is carried out to molten steel before bull ladle, soft blow argon flow amount is controlled in 50-60L/min, slag Face is not blown open, ensures molten steel soft blow time 12-13min；5-6min is stood after soft blow；
(5) continuous casting and rolling：It is produced with CSP continuous casting and rolling technique of sheet bar；Molten steel overheat control liquidus temperature add 15 to 20 DEG C, crystallization process uses non-sine mold oscillation curve and two cold curve hydraulic vibrations, the non-sine mold oscillation 200-250 times/s of curve vibration frequency, amplitude 2-3mm, pulling speed of continuous casting control is 2.7- in 3-4m/min, the control of crystallizer hot-fluid Specific water's control of 2.8mw/m2, continuous casting secondary cooling water are 1.85-1.9L/Kg, and control strand tapping temperature is 1230~1250 DEG C； It is 880~920 DEG C to control finishing temperature, and hot rolling plate thickness is 2-2.5mm；It is batched in 600-700 DEG C after section cooling, Batch it is offline after slowly cool to 280~320 DEG C with the cooling rate of≤10 DEG C/S after, then be quickly cooled down with >=30 DEG C/s, whole process is blown Argon is protected, and molten steel oxidation is avoided, and controls casting process nitrogen pick-up；Covering agent avoids the exposed selection low-carbon alloy of molten steel from protecting in Protect slag；
(6) hot rolled plate that hot rolled plate annealing is 2-2.5mm to the thickness of acquisition carries out hot rolled plate annealing, specifically in 1100- 1120 DEG C are kept for 30 seconds；
(7) cold rolling carries out once cold rolling with drafts 80-85% for the first time, carries out 1100-1120 DEG C later and keeps 30 seconds cold It rolls plate once to anneal, secondary cold-rolling is carried out with drafts 60-70% again later, obtains final cold rolling thin plate；
(8) subsequent processing carries out decarburizing annealing, decarburization annealing temperature in the moistening atmosphere of the arbitrary mixed proportions of wet type N2+H2 It it is 860-870 DEG C, annealing time is 60-70 seconds；Surface of steel plate after decarburizing annealing is coated with accounts for 80% interleaving agent for being with MgO, Secondary recrystallization is carried out, in turn, implements to keep 8 hours final annealings with 1180 DEG C of temperature in h 2 environments, orientation is made Silicon steel.
Embodiment 2
The production technology of high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is by percentage to the quality Be C 0.065, Si 4.15, P≤0.01, Mn 0.08, S 0.02, Mn/s mass ratio be 4: 1, Al 0.03, N 0.01, Se 0.043、Ni 1.65、Cr 0.62、Cu 0.12、Sb 0.008、Sn 0.45、Bi 0.18、Mo 0.07、Nb 0.005、V 0.12, Ti 0.06, Ta 0.12, remaining is Fe and inevitable field trash.
The production process route of orientation silicon steel is：Molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → Hot rolled plate annealing → cold rolling → subsequent processing；It is as follows：
(1) molten iron pre-processes；
(2) converter smelting：The mass ratio of molten iron and scrap steel block prepared by selecting step (1), molten iron and steel scrap is 8: 1, first plus useless Steel, rear hot metal charging first carry out de- P, and it is 3.1-3.2m to take off P stage speed of oxygen supply3/ (t*min), de- P stages account for oxygen supply total amount 35%, rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is supply oxygen total amount 15%, the oxygen supply of hypoxemia rifle position Amount is the 20% of oxygen supply total amount, and lime adding amount is 6-7kg/t steel, and it is 1.5-1.6 to take off P stage basicity, and de- P is added after terminating Lime stone, light dolomite mixture, lime stone, light dolomite mass ratio are 2.5: 1 in mixture, and mixture addition is 7kg/t steel turns back-slagging, and lime stone, which is added, to converter again later prepares to take off C, and it is 4.0- to take off C-stage speed of oxygen supply 4.1m3/ (t*min) accounts for the 65% of oxygen supply total amount, and rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is The 25% of total amount is supplied oxygen, hypoxemia rifle position oxygen-supplying amount is supply oxygen total amount 40%, and lime adding amount is 12-13kg/t steel, and converter is whole Point basicity is 3.8-3.9；Tapping temperature is 1600-1620 DEG C；Using floating plug, the double slag-stopping tappings of scum rod；Tapping process adds The lime of 5-5.5kg/t and the fluorite of 1.5-2kg/t make top slag；Wherein hyperoxia rifle position is H0× (1.4~1.5), hypoxemia rifle position For H0× (0.07~0.09), H0To turn molten steel in the stove face height；
(3) LF refining technique：The lime of the aluminum steel of 0.2kg/t, the fluorite of 0.6kg/t, 1kg/t is first added, first controls BOTTOM ARGON BLOWING Flow is adjusted to 210L/min in 450-460L/min after lime fusing, stops being powered after the complete white slag of clinker, makes white slag Target component：CaO 55%, SiO225%, Al2O314.5%, MgO 5%, FeO+Fe2O3+ MnO≤1.0%；It stirs energetically De- P, de- O, control BOTTOM ARGON BLOWING flow stir 12min in this case in 700-720L/min, control BOTTOM ARGON BLOWING flow later and exist 120-130L/min stirs 10-15min in this case, is once again powered up adjustment bath temperature convenient for tapping, soft blow stopping is blown Argon terminates LF refining；
(4) RH is refined：It is vacuumized under the conditions of not oxygen blown and carries out nature decarburization, promote Ar flow 800-850NL/min, carried out Dehydrogenation of Molten Steel ensures depth vacuum processing time >=12min, and the Al-Mg-Mn double deoxidizer removing steel of 0.01-0.03kg/t is added Then extra oxygen in water uses low-carbon ferromanganese, ferrosilicon and the conjunction containing Se, Ni, Cr, Cu, Sb, Sn, Bi, Mo, Nb, V, Ti, Ta Golden material to molten steel carry out alloying, composition adjustment complete after, it is desirable that vacuum processing time 6-7min, during which thermometric, take Sample, fine tuning composition；Vacuum terminates to carry out determining hydrogen；SiCa lines are fed per stove molten steel, and ensure that Ca contents are in 25~30ppm in molten steel Between, it is adjusted according to calcium content in steel；Soft blow is carried out to molten steel before bull ladle, soft blow argon flow amount is controlled in 50-60L/min, slag Face is not blown open, ensures molten steel soft blow time 12-13min；5-6min is stood after soft blow；
(5) continuous casting and rolling：It is produced with CSP continuous casting and rolling technique of sheet bar；Molten steel overheat control liquidus temperature add 15 to 20 DEG C, crystallization process uses non-sine mold oscillation curve and two cold curve hydraulic vibrations, the non-sine mold oscillation 200-250 times/s of curve vibration frequency, amplitude 2-3mm, pulling speed of continuous casting control is 2.7- in 3-4m/min, the control of crystallizer hot-fluid Specific water's control of 2.8mw/m2, continuous casting secondary cooling water are 1.85-1.9L/Kg, and control strand tapping temperature is 1230~1250 DEG C； It is 880~920 DEG C to control finishing temperature, and hot rolling plate thickness is 2-2.5mm；It is batched in 600-700 DEG C after section cooling, Batch it is offline after slowly cool to 280~320 DEG C with the cooling rate of≤10 DEG C/S after, then be quickly cooled down with >=30 DEG C/s, whole process is blown Argon is protected, and molten steel oxidation is avoided, and controls casting process nitrogen pick-up；Covering agent avoids the exposed selection low-carbon alloy of molten steel from protecting in Protect slag；
(6) hot rolled plate that hot rolled plate annealing is 2-2.5mm to the thickness of acquisition carries out hot rolled plate annealing, specifically in 1100- 1120 DEG C are kept for 30 seconds；
(7) cold rolling carries out once cold rolling with drafts 80-85% for the first time, carries out 1100-1120 DEG C later and keeps 30 seconds cold It rolls plate once to anneal, secondary cold-rolling is carried out with drafts 60-70% again later, obtains final cold rolling thin plate；
(8) subsequent processing carries out decarburizing annealing, decarburization annealing temperature in the moistening atmosphere of the arbitrary mixed proportions of wet type N2+H2 It it is 860-870 DEG C, annealing time is 60-70 seconds；Surface of steel plate after decarburizing annealing is coated with accounts for 80% interleaving agent for being with MgO, Secondary recrystallization is carried out, in turn, implements to keep 8 hours final annealings with 1180 DEG C of temperature in h 2 environments, orientation is made Silicon steel.
Embodiment 3
The production technology of high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is by percentage to the quality Be C 0.07, Si 4.2, P≤0.01, Mn 0.12, S 0.03, Mn/s mass ratio be 4: 1, Al 0.050, N 0.020, Se 0.045、Ni 1.70、Cr 0.65、Cu 0.15、Sb 0.01、Sn 0.5、Bi0.20、Mo0.08、Nb 0.010、V 0.15、Ti 0.08,0.15 Ta, remaining is Fe and inevitable field trash.
The production process route of orientation silicon steel is：Molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → Hot rolled plate annealing → cold rolling → subsequent processing；It is as follows：
(1) molten iron pre-processes；
(2) converter smelting：The mass ratio of molten iron and scrap steel block prepared by selecting step (1), molten iron and steel scrap is 8: 1, first plus useless Steel, rear hot metal charging first carry out de- P, and it is 3.1-3.2m to take off P stage speed of oxygen supply3/ (t*min), de- P stages account for oxygen supply total amount 35%, rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is supply oxygen total amount 15%, the oxygen supply of hypoxemia rifle position Amount is the 20% of oxygen supply total amount, and lime adding amount is 6-7kg/t steel, and it is 1.5-1.6 to take off P stage basicity, and de- P is added after terminating Lime stone, light dolomite mixture, lime stone, light dolomite mass ratio are 2.5: 1 in mixture, and mixture addition is 7kg/t steel turns back-slagging, and lime stone, which is added, to converter again later prepares to take off C, and it is 4.0- to take off C-stage speed of oxygen supply 4.1m3/ (t*min) accounts for the 65% of oxygen supply total amount, and rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is The 25% of total amount is supplied oxygen, hypoxemia rifle position oxygen-supplying amount is supply oxygen total amount 40%, and lime adding amount is 12-13kg/t steel, and converter is whole Point basicity is 3.8-3.9；Tapping temperature is 1600-1620 DEG C；Using floating plug, the double slag-stopping tappings of scum rod；Tapping process adds The lime of 5-5.5kg/t and the fluorite of 1.5-2kg/t make top slag；Wherein hyperoxia rifle position is H0× (1.4~1.5), hypoxemia rifle position For H0× (0.07~0.09), H0To turn molten steel in the stove face height；
(3) LF refining technique：The lime of the aluminum steel of 0.2kg/t, the fluorite of 0.6kg/t, 1kg/t is first added, first controls BOTTOM ARGON BLOWING Flow is adjusted to 210L/min in 450-460L/min after lime fusing, stops being powered after the complete white slag of clinker, makes white slag Target component：CaO 55%, SiO225%, Al2O314.5%, MgO 5%, FeO+Fe2O3+ MnO≤1.0%；It stirs energetically De- P, de- O, control BOTTOM ARGON BLOWING flow stir 12min in this case in 700-720L/min, control BOTTOM ARGON BLOWING flow later and exist 120-130L/min stirs 10-15min in this case, is once again powered up adjustment bath temperature convenient for tapping, soft blow stopping is blown Argon terminates LF refining；
(4) RH is refined：It is vacuumized under the conditions of not oxygen blown and carries out nature decarburization, promote Ar flow 800-850NL/min, carried out Dehydrogenation of Molten Steel ensures depth vacuum processing time >=12min, and the Al-Mg-Mn double deoxidizer removing steel of 0.01-0.03kg/t is added Then extra oxygen in water uses low-carbon ferromanganese, ferrosilicon and the conjunction containing Se, Ni, Cr, Cu, Sb, Sn, Bi, Mo, Nb, V, Ti, Ta Golden material to molten steel carry out alloying, composition adjustment complete after, it is desirable that vacuum processing time 6-7min, during which thermometric, take Sample, fine tuning composition；Vacuum terminates to carry out determining hydrogen；SiCa lines are fed per stove molten steel, and ensure that Ca contents are in 25~30ppm in molten steel Between, it is adjusted according to calcium content in steel；Soft blow is carried out to molten steel before bull ladle, soft blow argon flow amount is controlled in 50-60L/min, slag Face is not blown open, ensures molten steel soft blow time 12-13min；5-6min is stood after soft blow；
(5) continuous casting and rolling：It is produced with CSP continuous casting and rolling technique of sheet bar；Molten steel overheat control liquidus temperature add 15 to 20 DEG C, crystallization process uses non-sine mold oscillation curve and two cold curve hydraulic vibrations, the non-sine mold oscillation 200-250 times/s of curve vibration frequency, amplitude 2-3mm, pulling speed of continuous casting control is 2.7- in 3-4m/min, the control of crystallizer hot-fluid Specific water's control of 2.8mw/m2, continuous casting secondary cooling water are 1.85-1.9L/Kg, and control strand tapping temperature is 1230~1250 DEG C； It is 880~920 DEG C to control finishing temperature, and hot rolling plate thickness is 2-2.5mm；It is batched in 600-700 DEG C after section cooling, Batch it is offline after slowly cool to 280~320 DEG C with the cooling rate of≤10 DEG C/S after, then be quickly cooled down with >=30 DEG C/s, whole process is blown Argon is protected, and molten steel oxidation is avoided, and controls casting process nitrogen pick-up；Covering agent avoids the exposed selection low-carbon alloy of molten steel from protecting in Protect slag；
(6) hot rolled plate that hot rolled plate annealing is 2-2.5mm to the thickness of acquisition carries out hot rolled plate annealing, specifically in 1100- 1120 DEG C are kept for 30 seconds；
(7) cold rolling carries out once cold rolling with drafts 80-85% for the first time, carries out 1100-1120 DEG C later and keeps 30 seconds cold It rolls plate once to anneal, secondary cold-rolling is carried out with drafts 60-70% again later, obtains final cold rolling thin plate；
(8) subsequent processing carries out decarburizing annealing, decarburization annealing temperature in the moistening atmosphere of the arbitrary mixed proportions of wet type N2+H2 It it is 860-870 DEG C, annealing time is 60-70 seconds；Surface of steel plate after decarburizing annealing is coated with accounts for 80% interleaving agent for being with MgO, Secondary recrystallization is carried out, in turn, implements to keep 8 hours final annealings with 1180 DEG C of temperature in h 2 environments, orientation is made Silicon steel.
Comparative example 1
The production technology of high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Pipeline composition of steel be orientation silicon steel ingredient with Mass percent meter be C 0.04, Si 2, P≤0.01, Mn 0.08, S 0.02, Mn/s mass ratio be 4: 1, Al 0.010, N 0.003、Se 0.01、Ni 1.1、Cr 0.6、Cu 0.1、Sb 0.005、Sn 0.4、Bi 0.15、Mo 0.05、Nb 0.001、V 0.1, Ti 0.05, Ta 0.1, remaining is Fe and inevitable field trash.
The production process route of orientation silicon steel is：Molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → Hot rolled plate annealing → cold rolling → subsequent processing；It is as follows：
(1) molten iron pre-processes；
(2) converter smelting：The mass ratio of molten iron and scrap steel block prepared by selecting step (1), molten iron and steel scrap is 8: 1, first plus useless Steel, rear hot metal charging first carry out de- P, and it is 3.1-3.2m to take off P stage speed of oxygen supply3/ (t*min), de- P stages account for oxygen supply total amount 35%, rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is supply oxygen total amount 15%, the oxygen supply of hypoxemia rifle position Amount is the 20% of oxygen supply total amount, and lime adding amount is 6-7kg/t steel, and it is 1.5-1.6 to take off P stage basicity, and de- P is added after terminating Lime stone, light dolomite mixture, lime stone, light dolomite mass ratio are 2.5: 1 in mixture, and mixture addition is 7kg/t steel turns back-slagging, and lime stone, which is added, to converter again later prepares to take off C, and it is 4.0- to take off C-stage speed of oxygen supply 4.1m3/ (t*min) accounts for the 65% of oxygen supply total amount, and rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is The 25% of total amount is supplied oxygen, hypoxemia rifle position oxygen-supplying amount is supply oxygen total amount 40%, and lime adding amount is 12-13kg/t steel, and converter is whole Point basicity is 3.8-3.9；Tapping temperature is 1600-1620 DEG C；Using floating plug, the double slag-stopping tappings of scum rod；Tapping process adds The lime of 5-5.5kg/t and the fluorite of 1.5-2kg/t make top slag；Wherein hyperoxia rifle position is H0× (1.4~1.5), hypoxemia rifle position For H0× (0.07~0.09), H0To turn molten steel in the stove face height；
(3) LF refining technique：The lime of the aluminum steel of 0.2kg/t, the fluorite of 0.6kg/t, 1kg/t is first added, first controls BOTTOM ARGON BLOWING Flow is adjusted to 210L/min in 450-460L/min after lime fusing, stops being powered after the complete white slag of clinker, makes white slag Target component：CaO 55%, SiO225%, Al2O314.5%, MgO 5%, FeO+Fe2O3+ MnO≤1.0%；It stirs energetically De- P, de- O, control BOTTOM ARGON BLOWING flow stir 12min in this case in 700-720L/min, control BOTTOM ARGON BLOWING flow later and exist 120-130L/min stirs 10-15min in this case, is once again powered up adjustment bath temperature convenient for tapping, soft blow stopping is blown Argon terminates LF refining；
(4) RH is refined：It is vacuumized under the conditions of not oxygen blown and carries out nature decarburization, promote Ar flow 800-850NL/min, carried out Dehydrogenation of Molten Steel ensures depth vacuum processing time >=12min, and the Al-Mg-Mn double deoxidizer removing steel of 0.01-0.03kg/t is added Then extra oxygen in water uses low-carbon ferromanganese, ferrosilicon and the conjunction containing Se, Ni, Cr, Cu, Sb, Sn, Bi, Mo, Nb, V, Ti, Ta Golden material to molten steel carry out alloying, composition adjustment complete after, it is desirable that vacuum processing time 6-7min, during which thermometric, take Sample, fine tuning composition；Vacuum terminates to carry out determining hydrogen；SiCa lines are fed per stove molten steel, and ensure that Ca contents are in 25~30ppm in molten steel Between, it is adjusted according to calcium content in steel；Soft blow is carried out to molten steel before bull ladle, soft blow argon flow amount is controlled in 50-60L/min, slag Face is not blown open, ensures molten steel soft blow time 12-13min；5-6min is stood after soft blow；
(5) continuous casting and rolling：It is produced with CSP continuous casting and rolling technique of sheet bar；Molten steel overheat control liquidus temperature add 15 to 20 DEG C, crystallization process uses non-sine mold oscillation curve and two cold curve hydraulic vibrations, the non-sine mold oscillation 200-250 times/s of curve vibration frequency, amplitude 2-3mm, pulling speed of continuous casting control is 2.7- in 3-4m/min, the control of crystallizer hot-fluid Specific water's control of 2.8mw/m2, continuous casting secondary cooling water are 1.85-1.9L/Kg, and control strand tapping temperature is 1230~1250 DEG C； It is 880~920 DEG C to control finishing temperature, and hot rolling plate thickness is 2-2.5mm；It is batched in 600-700 DEG C after section cooling, Batch it is offline after slowly cool to 280~320 DEG C with the cooling rate of≤10 DEG C/S after, then be quickly cooled down with >=30 DEG C/s, whole process is blown Argon is protected, and molten steel oxidation is avoided, and controls casting process nitrogen pick-up；Covering agent avoids the exposed selection low-carbon alloy of molten steel from protecting in Protect slag；
(6) hot rolled plate that hot rolled plate annealing is 2-2.5mm to the thickness of acquisition carries out hot rolled plate annealing, specifically in 1100- 1120 DEG C are kept for 30 seconds；
(7) cold rolling carries out once cold rolling with drafts 80-85% for the first time, carries out 1100-1120 DEG C later and keeps 30 seconds cold It rolls plate once to anneal, secondary cold-rolling is carried out with drafts 60-70% again later, obtains final cold rolling thin plate；
(8) subsequent processing carries out decarburizing annealing, decarburization annealing temperature in the moistening atmosphere of the arbitrary mixed proportions of wet type N2+H2 It it is 860-870 DEG C, annealing time is 60-70 seconds；Surface of steel plate after decarburizing annealing is coated with accounts for 80% interleaving agent for being with MgO, Secondary recrystallization is carried out, in turn, implements to keep 8 hours final annealings with 1180 DEG C of temperature in h 2 environments, orientation is made Silicon steel.
Comparative example 2
The production technology of high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is by percentage to the quality Be C 0.065, Si 4.15, P≤0.01, Mn 0.08, S 0.02, Mn/s mass ratio be 4: 1, Al 0.03, N 0.01, Se 0.043、Ni 1.65、Cr 0.4、Cu 0.01、Sb 0.001、Sn 0.1、Bi 0.01、Mo 0.01、Nb 0.005、V 0.05、 Ti 0.01, Ta 0.02, remaining is Fe and inevitable field trash.
The production process route of orientation silicon steel is：Molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → Hot rolled plate annealing → cold rolling → subsequent processing；It is as follows：
(1) molten iron pre-processes；
(2) converter smelting：The mass ratio of molten iron and scrap steel block prepared by selecting step (1), molten iron and steel scrap is 8: 1, first plus useless Steel, rear hot metal charging first carry out de- P, and it is 3.1-3.2m to take off P stage speed of oxygen supply3/ (t*min), de- P stages account for oxygen supply total amount 35%, rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is supply oxygen total amount 15%, the oxygen supply of hypoxemia rifle position Amount is the 20% of oxygen supply total amount, and lime adding amount is 6-7kg/t steel, and it is 1.5-1.6 to take off P stage basicity, and de- P is added after terminating Lime stone, light dolomite mixture, lime stone, light dolomite mass ratio are 2.5: 1 in mixture, and mixture addition is 7kg/t steel turns back-slagging, and lime stone, which is added, to converter again later prepares to take off C, and it is 4.0- to take off C-stage speed of oxygen supply 4.1m3/ (t*min) accounts for the 65% of oxygen supply total amount, and rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is The 25% of total amount is supplied oxygen, hypoxemia rifle position oxygen-supplying amount is supply oxygen total amount 40%, and lime adding amount is 12-13kg/t steel, and converter is whole Point basicity is 3.8-3.9；Tapping temperature is 1600-1620 DEG C；Using floating plug, the double slag-stopping tappings of scum rod；Tapping process adds The lime of 5-5.5kg/t and the fluorite of 1.5-2kg/t make top slag；Wherein hyperoxia rifle position is H0× (1.4~1.5), hypoxemia rifle position For H0× (0.07~0.09), H0To turn molten steel in the stove face height；
(3) LF refining technique：The lime of the aluminum steel of 0.2kg/t, the fluorite of 0.6kg/t, 1kg/t is first added, first controls BOTTOM ARGON BLOWING Flow is adjusted to 210L/min in 450-460L/min after lime fusing, stops being powered after the complete white slag of clinker, makes white slag Target component：CaO 55%, SiO225%, Al2O314.5%, MgO 5%, FeO+Fe2O3+ MnO≤1.0%；It stirs energetically De- P, de- O, control BOTTOM ARGON BLOWING flow stir 12min in this case in 700-720L/min, control BOTTOM ARGON BLOWING flow later and exist 120-130L/min stirs 10-15min in this case, is once again powered up adjustment bath temperature convenient for tapping, soft blow stopping is blown Argon terminates LF refining；
(4) RH is refined：It is vacuumized under the conditions of not oxygen blown and carries out nature decarburization, promote Ar flow 800-850NL/min, carried out Dehydrogenation of Molten Steel ensures depth vacuum processing time >=12min, and the Al-Mg-Mn double deoxidizer removing steel of 0.01-0.03kg/t is added Then extra oxygen in water uses low-carbon ferromanganese, ferrosilicon and the conjunction containing Se, Ni, Cr, Cu, Sb, Sn, Bi, Mo, Nb, V, Ti, Ta Golden material to molten steel carry out alloying, composition adjustment complete after, it is desirable that vacuum processing time 6-7min, during which thermometric, take Sample, fine tuning composition；Vacuum terminates to carry out determining hydrogen；SiCa lines are fed per stove molten steel, and ensure that Ca contents are in 25~30ppm in molten steel Between, it is adjusted according to calcium content in steel；Soft blow is carried out to molten steel before bull ladle, soft blow argon flow amount is controlled in 50-60L/min, slag Face is not blown open, ensures molten steel soft blow time 12-13min；5-6min is stood after soft blow；
(5) continuous casting and rolling：It is produced with CSP continuous casting and rolling technique of sheet bar；Molten steel overheat control liquidus temperature add 15 to 20 DEG C, crystallization process uses non-sine mold oscillation curve and two cold curve hydraulic vibrations, the non-sine mold oscillation 200-250 times/s of curve vibration frequency, amplitude 2-3mm, pulling speed of continuous casting control is 2.7- in 3-4m/min, the control of crystallizer hot-fluid Specific water's control of 2.8mw/m2, continuous casting secondary cooling water are 1.85-1.9L/Kg, and control strand tapping temperature is 1230~1250 DEG C； It is 880~920 DEG C to control finishing temperature, and hot rolling plate thickness is 2-2.5mm；It is batched in 600-700 DEG C after section cooling, Batch it is offline after slowly cool to 280~320 DEG C with the cooling rate of≤10 DEG C/S after, then be quickly cooled down with >=30 DEG C/s, whole process is blown Argon is protected, and molten steel oxidation is avoided, and controls casting process nitrogen pick-up；Covering agent avoids the exposed selection low-carbon alloy of molten steel from protecting in Protect slag；
(6) hot rolled plate that hot rolled plate annealing is 2-2.5mm to the thickness of acquisition carries out hot rolled plate annealing, specifically in 1100- 1120 DEG C are kept for 30 seconds；
(7) cold rolling carries out once cold rolling with drafts 80-85% for the first time, carries out 1100-1120 DEG C later and keeps 30 seconds cold It rolls plate once to anneal, secondary cold-rolling is carried out with drafts 60-70% again later, obtains final cold rolling thin plate；
(8) subsequent processing carries out decarburizing annealing, decarburization annealing temperature in the moistening atmosphere of the arbitrary mixed proportions of wet type N2+H2 It it is 860-870 DEG C, annealing time is 60-70 seconds；Surface of steel plate after decarburizing annealing is coated with accounts for 80% interleaving agent for being with MgO, Secondary recrystallization is carried out, in turn, implements to keep 8 hours final annealings with 1180 DEG C of temperature in h 2 environments, orientation is made Silicon steel.
Comparative example 3
The production technology of high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is by percentage to the quality It is C 0.07, Si 4.2, P≤0.01, Mn 0.06, S 0.03, Al 0.050, N 0.020, Se 0.045, Ni 1.70, Cr 0.65, Cu 0.15, Sb 0.01, Sn 0.5, Bi0.20, Mo0.08, Nb 0.010, V 0.15, Ti 0.08, Ta 0.15, Remaining is Fe and inevitable field trash.
The production process route of orientation silicon steel is：Molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → Hot rolled plate annealing → cold rolling → subsequent processing；It is as follows：
(1) molten iron pre-processes；
(2) converter smelting：The mass ratio of molten iron and scrap steel block prepared by selecting step (1), molten iron and steel scrap is 8: 1, first plus useless Steel, rear hot metal charging first carry out de- P, and it is 3.1-3.2m to take off P stage speed of oxygen supply3/ (t*min), de- P stages account for oxygen supply total amount 35%, rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is supply oxygen total amount 15%, the oxygen supply of hypoxemia rifle position Amount is the 20% of oxygen supply total amount, and lime adding amount is 6-7kg/t steel, and it is 1.5-1.6 to take off P stage basicity, and de- P is added after terminating Lime stone, light dolomite mixture, lime stone, light dolomite mass ratio are 2.5: 1 in mixture, and mixture addition is 7kg/t steel turns back-slagging, and lime stone, which is added, to converter again later prepares to take off C, and it is 4.0- to take off C-stage speed of oxygen supply 4.1m3/ (t*min) accounts for the 65% of oxygen supply total amount, and rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is The 25% of total amount is supplied oxygen, hypoxemia rifle position oxygen-supplying amount is supply oxygen total amount 40%, and lime adding amount is 12-13kg/t steel, and converter is whole Point basicity is 3.8-3.9；Tapping temperature is 1600-1620 DEG C；Using floating plug, the double slag-stopping tappings of scum rod；Tapping process adds The lime of 5-5.5kg/t and the fluorite of 1.5-2kg/t make top slag；Wherein hyperoxia rifle position is H0× (1.4~1.5), hypoxemia rifle position For H0× (0.07~0.09), H0To turn molten steel in the stove face height；
(3) LF refining technique：The lime of the aluminum steel of 0.2kg/t, the fluorite of 0.6kg/t, 1kg/t is first added, first controls BOTTOM ARGON BLOWING Flow is adjusted to 210L/min in 450-460L/min after lime fusing, stops being powered after the complete white slag of clinker, makes white slag Target component：CaO 55%, SiO225%, Al2O314.5%, MgO 5%, FeO+Fe2O3+ MnO≤1.0%；It stirs energetically De- P, de- O, control BOTTOM ARGON BLOWING flow stir 12min in this case in 700-720L/min, control BOTTOM ARGON BLOWING flow later and exist 120-130L/min stirs 10-15min in this case, is once again powered up adjustment bath temperature convenient for tapping, soft blow stopping is blown Argon terminates LF refining；
(4) RH is refined：It is vacuumized under the conditions of not oxygen blown and carries out nature decarburization, promote Ar flow 800-850NL/min, carried out Dehydrogenation of Molten Steel ensures depth vacuum processing time >=12min, and the Al-Mg-Mn double deoxidizer removing steel of 0.01-0.03kg/t is added Then extra oxygen in water uses low-carbon ferromanganese, ferrosilicon and the conjunction containing Se, Ni, Cr, Cu, Sb, Sn, Bi, Mo, Nb, V, Ti, Ta Golden material to molten steel carry out alloying, composition adjustment complete after, it is desirable that vacuum processing time 6-7min, during which thermometric, take Sample, fine tuning composition；Vacuum terminates to carry out determining hydrogen；SiCa lines are fed per stove molten steel, and ensure that Ca contents are in 25~30ppm in molten steel Between, it is adjusted according to calcium content in steel；Soft blow is carried out to molten steel before bull ladle, soft blow argon flow amount is controlled in 50-60L/min, slag Face is not blown open, ensures molten steel soft blow time 12-13min；5-6min is stood after soft blow；
(5) continuous casting and rolling：It is produced with CSP continuous casting and rolling technique of sheet bar；Molten steel overheat control liquidus temperature add 15 to 20 DEG C, crystallization process uses non-sine mold oscillation curve and two cold curve hydraulic vibrations, the non-sine mold oscillation 200-250 times/s of curve vibration frequency, amplitude 2-3mm, pulling speed of continuous casting control is 2.7- in 3-4m/min, the control of crystallizer hot-fluid Specific water's control of 2.8mw/m2, continuous casting secondary cooling water are 1.85-1.9L/Kg, and control strand tapping temperature is 1230~1250 DEG C； It is 880~920 DEG C to control finishing temperature, and hot rolling plate thickness is 2-2.5mm；It is batched in 600-700 DEG C after section cooling, Batch it is offline after slowly cool to 280~320 DEG C with the cooling rate of≤10 DEG C/S after, then be quickly cooled down with >=30 DEG C/s, whole process is blown Argon is protected, and molten steel oxidation is avoided, and controls casting process nitrogen pick-up；Covering agent avoids the exposed selection low-carbon alloy of molten steel from protecting in Protect slag；
(6) hot rolled plate that hot rolled plate annealing is 2-2.5mm to the thickness of acquisition carries out hot rolled plate annealing, specifically in 1100- 1120 DEG C are kept for 30 seconds；
(7) cold rolling carries out once cold rolling with drafts 80-85% for the first time, carries out 1100-1120 DEG C later and keeps 30 seconds cold It rolls plate once to anneal, secondary cold-rolling is carried out with drafts 60-70% again later, obtains final cold rolling thin plate；
(8) subsequent processing carries out decarburizing annealing, decarburization annealing temperature in the moistening atmosphere of the arbitrary mixed proportions of wet type N2+H2 It it is 860-870 DEG C, annealing time is 60-70 seconds；Surface of steel plate after decarburizing annealing is coated with accounts for 80% interleaving agent for being with MgO, Secondary recrystallization is carried out, in turn, implements to keep 8 hours final annealings with 1180 DEG C of temperature in h 2 environments, orientation is made Silicon steel.
Comparative example 4
The production technology of high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is by percentage to the quality Be C 0.07, Si 4.2, P≤0.01, Mn 0.12, S 0.03, Mn/s mass ratio be 4: 1, Al 0.050, N 0.020, Se 0.045、Ni 1.70、Cr 0.65、Cu 0.15、Sb 0.01、Sn 0.5、Bi0.20、Mo0.08、Nb 0.010、V 0.15、Ti 0.08,0.15 Ta, remaining is Fe and inevitable field trash.
The production process route of orientation silicon steel is：Molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → Hot rolled plate annealing → cold rolling → subsequent processing；It is as follows：
(1) molten iron pre-processes；
(2) converter smelting：The mass ratio of molten iron and scrap steel block prepared by selecting step (1), molten iron and steel scrap is 8: 1, first plus useless Steel, rear hot metal charging first carry out de- P, and it is 3.1-3.2m to take off P stage speed of oxygen supply3/ (t*min), de- P stages account for oxygen supply total amount 35%, rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is supply oxygen total amount 15%, the oxygen supply of hypoxemia rifle position Amount is the 20% of oxygen supply total amount, and lime adding amount is 6-7kg/t steel, and it is 1.5-1.6 to take off P stage basicity, and de- P is added after terminating Lime stone, light dolomite mixture, lime stone, light dolomite mass ratio are 2.5: 1 in mixture, and mixture addition is 7kg/t steel turns back-slagging, and lime stone, which is added, to converter again later prepares to take off C, and it is 4.0- to take off C-stage speed of oxygen supply 4.1m3/ (t*min) accounts for the 65% of oxygen supply total amount, and rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is The 25% of total amount is supplied oxygen, hypoxemia rifle position oxygen-supplying amount is supply oxygen total amount 40%, and lime adding amount is 12-13kg/t steel, and converter is whole Point basicity is 3.8-3.9；Tapping temperature is 1600-1620 DEG C；Using floating plug, the double slag-stopping tappings of scum rod；Tapping process adds The lime of 5-5.5kg/t and the fluorite of 1.5-2kg/t make top slag；Wherein hyperoxia rifle position is H0× (1.4~1.5), hypoxemia rifle position For H0× (0.07~0.09), H0To turn molten steel in the stove face height；
(3) LF refining technique：The lime of the aluminum steel of 0.2kg/t, the fluorite of 0.6kg/t, 1kg/t is first added, first controls BOTTOM ARGON BLOWING Flow is adjusted to 210L/min in 450-460L/min after lime fusing, stops being powered after the complete white slag of clinker, makes white slag Target component：CaO 55%, SiO225%, Al2O314.5%, MgO 5%, FeO+Fe2O3+ MnO≤1.0%；It stirs energetically De- P, de- O, control BOTTOM ARGON BLOWING flow stir 12min in this case in 700-720L/min, control BOTTOM ARGON BLOWING flow later and exist 120-130L/min stirs 10-15min in this case, is once again powered up adjustment bath temperature convenient for tapping, soft blow stopping is blown Argon terminates LF refining；
(4) RH is refined：It is vacuumized under the conditions of not oxygen blown and carries out nature decarburization, promote Ar flow 800-850NL/min, carried out Dehydrogenation of Molten Steel ensures depth vacuum processing time >=12min, and the Al-Mg-Mn double deoxidizer removing steel of 0.01-0.03kg/t is added Then extra oxygen in water uses low-carbon ferromanganese, ferrosilicon and the conjunction containing Se, Ni, Cr, Cu, Sb, Sn, Bi, Mo, Nb, V, Ti, Ta Golden material to molten steel carry out alloying, composition adjustment complete after, it is desirable that vacuum processing time 6-7min, during which thermometric, take Sample, fine tuning composition；Vacuum terminates to carry out determining hydrogen；SiCa lines are fed per stove molten steel, and ensure that Ca contents are in 25~30ppm in molten steel Between, it is adjusted according to calcium content in steel；Soft blow is carried out to molten steel before bull ladle, soft blow argon flow amount is controlled in 50-60L/min, slag Face is not blown open, ensures molten steel soft blow time 12-13min；5-6min is stood after soft blow；
(5) continuous casting and rolling：It is produced with CSP continuous casting and rolling technique of sheet bar；Molten steel overheat control liquidus temperature add 15 to 20 DEG C, crystallization process uses non-sine mold oscillation curve and two cold curve hydraulic vibrations, the non-sine mold oscillation 200-250 times/s of curve vibration frequency, amplitude 2-3mm, pulling speed of continuous casting control is 2.7- in 3-4m/min, the control of crystallizer hot-fluid Specific water's control of 2.8mw/m2, continuous casting secondary cooling water are 1.85-1.9L/Kg, and control strand tapping temperature is 1230~1250 DEG C； It is 880~920 DEG C to control finishing temperature, and hot rolling plate thickness is 2-2.5mm；It is batched in 600-700 DEG C after section cooling, Batch it is offline after slowly cool to 280~320 DEG C with the cooling rate of≤10 DEG C/S after, then be quickly cooled down with >=30 DEG C/s, whole process is blown Argon is protected, and molten steel oxidation is avoided, and controls casting process nitrogen pick-up；Covering agent avoids the exposed selection low-carbon alloy of molten steel from protecting in Protect slag；
(6) hot rolled plate that hot rolled plate annealing is 2mm to the thickness of acquisition carries out hot rolled plate annealing, is specifically kept at 1080 DEG C 30 seconds；
(7) cold rolling carries out once cold rolling with drafts 75% for the first time, carries out 1080 DEG C later and keeps 30 seconds cold-reduced sheets primary Annealing carries out secondary cold-rolling with drafts 70% again later, obtains final cold rolling thin plate；
(8) subsequent processing carries out decarburizing annealing, decarburization annealing temperature in the moistening atmosphere of the arbitrary mixed proportions of wet type N2+H2 It it is 830 DEG C, annealing time is 60 seconds；Surface of steel plate after decarburizing annealing is coated with accounts for 80% interleaving agent for being with MgO, carries out secondary Recrystallization is implemented to be kept 8 hours final annealings with 1150 DEG C of temperature, orientation silicon steel is made in h 2 environments in turn.
Need to highlight is that while that comparative example does not do more contrast tests, but this field with regard to other specific steps Technical staff understands that the techniques such as converter smelting, LF refining technique, RH refinings, continuous casting and rolling can equally generate properties of product Tremendous influence.
Service check is carried out to the steel plate of the embodiment of the present invention 1~3 and comparative example 1-4, inspection result is shown in Table 1.
Table 1
Type Iron loss W17/50(W/kg) B8(T)
Embodiment 1 ≥0.78 ≥1.92
Embodiment 2 ≥0.8 ≥1.93
Embodiment 3 ≥0.82 ≥1.95
Comparative example 1 ≥0.88 ≥1.72
Comparative example 2 ≥0.92 ≥1.68
Comparative example 3 ≥0.85 ≥1.8
Comparative example 4 ≥0.95 ≥1.61
Term used herein is explanation and term exemplary, and not restrictive.Since the present invention can be with a variety of Form be embodied without departing from invention spirit or essence, it should therefore be appreciated that above-described embodiment be not limited to it is any above-mentioned Details, and should widely being explained in the spirit and scope defined by appended claims, thus fall into claim or its etc. Whole variations and remodeling in effect range all should be appended claims and covered.

Claims (5)

1. a kind of production technology of high-magnetic induction, low-iron loss orientation silicon steel, it is characterised in that：Orientation silicon steel ingredient is with mass percent Meter be C 0.06-0.07, Si 4.1-4.2, P≤0.01, Mn 0.06-0.12, S 0.02-0.03, Mn/s mass ratio be 4: 1, Al 0.010~0.050, N 0.003~0.020, Se 0.04~0.045, Ni 1.6~1.70, Cr 0.6~0.65, Cu 0.1~0.15, Sb 0.005~0.01, Sn 0.4~0.5, Bi 0.15~0.20, Mo 0.05~0.08, Nb 0.0010~ 0.010, V 0.1~0.15, Ti 0.05~0.08, Ta 0.1~0.15, remaining is Fe and inevitable field trash, finally It is 45-60nm, Cu that the size of MnS particles, which is the size of 20-50 nm, MnSe particles, in product2The size of S particles is 25- 40nm, secondary recrystallization grain size are 10-11mm, iron loss W17/50It is 0.78-0.82W/kg, B8It is 1.9-1.95T；
The production process route of orientation silicon steel is：Molten iron pretreatment → converter smelting → LF refining → RH refinings → continuous casting and rolling → Hot rolled plate annealing → cold rolling → subsequent processing；It is as follows：
(1) molten iron pre-processes；
(2) converter smelting：The mass ratio of molten iron and scrap steel block prepared by selecting step (1), molten iron and steel scrap is 8: 1, first plus useless Steel, rear hot metal charging first carry out de- P, and it is 3.1-3.2m to take off P stage speed of oxygen supply3/ (t*min), de- P stages account for oxygen supply total amount 35%, rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is supply oxygen total amount 15%, the oxygen supply of hypoxemia rifle position Amount is the 20% of oxygen supply total amount, and lime adding amount is 6-7kg/t steel, and it is 1.5-1.6 to take off P stage basicity, and de- P is added after terminating Lime stone, light dolomite mixture, lime stone, light dolomite mass ratio are 2.5: 1 in mixture, and mixture addition is 7kg/t steel turns back-slagging, and lime stone, which is added, to converter again later prepares to take off C, and it is 4.0- to take off C-stage speed of oxygen supply 4.1m3/ (t*min) accounts for the 65% of oxygen supply total amount, and rifle position control is hyperoxia rifle position → hypoxemia rifle position, and hyperoxia rifle position oxygen-supplying amount is The 25% of total amount is supplied oxygen, hypoxemia rifle position oxygen-supplying amount is supply oxygen total amount 40%, and lime adding amount is 12-13kg/t steel, and converter is whole Point basicity is 3.8-3.9；Tapping temperature is 1600-1620 DEG C；Using floating plug, the double slag-stopping tappings of scum rod；Tapping process adds The lime of 5-5.5kg/t and the fluorite of 1.5-2kg/t make top slag；Wherein hyperoxia rifle position is H0× (1.4~1.5), hypoxemia rifle position For H0× (0.07~0.09), H0To turn molten steel in the stove face height；
(3) LF refining technique：The lime of the aluminum steel of 0.2kg/t, the fluorite of 0.6kg/t, 1kg/t is first added, first controls BOTTOM ARGON BLOWING Flow is adjusted to 210L/min in 450-460L/min after lime fusing, stops being powered after the complete white slag of clinker, makes white slag Target component：CaO 55%, SiO225%, Al2O314.5%, MgO 5%, FeO+Fe2O3+ MnO≤1.0%；It stirs energetically De- P, de- O, control BOTTOM ARGON BLOWING flow stir 12min in this case in 700-720L/min, control BOTTOM ARGON BLOWING flow later and exist 120-130L/min stirs 10-15min in this case, is once again powered up adjustment bath temperature convenient for tapping, soft blow stopping is blown Argon terminates LF refining；
(4) RH is refined：It is vacuumized under the conditions of not oxygen blown and carries out nature decarburization, promote Ar flow 800-850NL/min, carried out Dehydrogenation of Molten Steel ensures depth vacuum processing time >=12min, and the Al-Mg-Mn double deoxidizer removing steel of 0.01-0.03kg/t is added Then extra oxygen in water uses low-carbon ferromanganese, ferrosilicon and the conjunction containing Se, Ni, Cr, Cu, Sb, Sn, Bi, Mo, Nb, V, Ti, Ta Golden material to molten steel carry out alloying, composition adjustment complete after, it is desirable that vacuum processing time 6-7min, during which thermometric, take Sample, fine tuning composition；Vacuum terminates to carry out determining hydrogen；SiCa lines are fed per stove molten steel, and ensure that Ca contents are in 25~30ppm in molten steel Between, it is adjusted according to calcium content in steel；Soft blow is carried out to molten steel before bull ladle, soft blow argon flow amount is controlled in 50-60L/min, slag Face is not blown open, ensures molten steel soft blow time 12-13min；5-6min is stood after soft blow；
(5) continuous casting and rolling：It is produced with CSP continuous casting and rolling technique of sheet bar；Molten steel overheat control liquidus temperature add 15 to 20 DEG C, crystallization process uses non-sine mold oscillation curve and two cold curve hydraulic vibrations, the non-sine mold oscillation 200-250 times/s of curve vibration frequency, amplitude 2-3mm, pulling speed of continuous casting control is 2.7- in 3-4m/min, the control of crystallizer hot-fluid Specific water's control of 2.8mw/m2, continuous casting secondary cooling water are 1.85-1.9L/Kg, and control strand tapping temperature is 1230~1250 DEG C； It is 880~920 DEG C to control finishing temperature, and hot rolling plate thickness is 2-2.5mm；It is batched in 600-700 DEG C after section cooling, Batch it is offline after slowly cool to 280~320 DEG C with the cooling rate of≤10 DEG C/S after, then be quickly cooled down with >=30 DEG C/s, whole process is blown Argon is protected, and molten steel oxidation is avoided, and controls casting process nitrogen pick-up；Covering agent avoids the exposed selection low-carbon alloy of molten steel from protecting in Protect slag；
(6) hot rolled plate that hot rolled plate annealing is 2-2.5mm to the thickness of acquisition carries out hot rolled plate annealing, specifically in 1100- 1120 DEG C are kept for 30 seconds；
(7) cold rolling carries out once cold rolling with drafts 80-85% for the first time, carries out 1100-1120 DEG C later and keeps 30 seconds cold It rolls plate once to anneal, secondary cold-rolling is carried out with drafts 60-70% again later, obtains final cold rolling thin plate；
(8) subsequent processing is in wet type N2+H2Decarburizing annealing is carried out in the moistening atmosphere of arbitrary mixed proportion, decarburization annealing temperature is 860-870 DEG C, annealing time is 60-70 seconds；Surface of steel plate after decarburizing annealing is coated with accounts for 80% interleaving agent for being with MgO, into Row secondary recrystallization is implemented to be kept 8 hours final annealings with 1180 DEG C of temperature, oriented silicon is made in h 2 environments in turn Steel.
2. the production technology of high-magnetic induction, low-iron loss orientation silicon steel as described in claim 1, it is characterised in that：Orientation silicon steel ingredient with Mass percent meter be C 0.06, Si 4.1, P≤0.01, Mn 0.08, S 0.02, Mn/s mass ratio be 4: 1, Al 0.010、N 0.003、Se 0.04、Ni 1.6、Cr 0.6、Cu 0.1、Sb 0.005、Sn 0.4、Bi 0.15、Mo 0.05、Nb 0.001, V 0.1, Ti 0.05, Ta 0.1, remaining is Fe and inevitable field trash.
3. the production technology of high-magnetic induction, low-iron loss orientation silicon steel as claimed in claim 2, it is characterised in that：Orientation silicon steel ingredient with Mass percent meter be C 0.065, Si 4.15, P≤0.01, Mn 0.08, S 0.02, Mn/s mass ratio be 4: 1, Al 0.03、N 0.01、Se 0.043、Ni 1.65、Cr 0.62、Cu 0.12、Sb 0.008、Sn 0.45、Bi 0.18、Mo 0.07, Nb 0.005, V 0.12, Ti 0.06, Ta 0.12, remaining is Fe and inevitable field trash.
4. the production technology of high-magnetic induction, low-iron loss orientation silicon steel as claimed in claim 2, it is characterised in that：Orientation silicon steel ingredient with Mass percent meter be C 0.07, Si 4.2, P≤0.01, Mn 0.12, S 0.03, Mn/s mass ratio be 4: 1, Al 0.050、N 0.020、Se 0.045、Ni 1.70、Cr 0.65、Cu 0.15、Sb 0.01、Sn 0.5、Bi0.20、Mo0.08、 Nb 0.010, V 0.15, Ti 0.08, Ta 0.15, remaining is Fe and inevitable field trash.
5. the production technology of high-magnetic induction, low-iron loss orientation silicon steel as described in claim 1, it is characterised in that：Step (6) hot rolled plate It anneals and hot rolled plate annealing is carried out for the hot rolled plate of 2.3mm to the thickness of acquisition, specifically kept for 30 seconds at 1120 DEG C；(7) cold rolling Once cold rolling is carried out with drafts 82% for the first time, the cold-reduced sheet that 1120 DEG C are kept for 30 seconds is carried out later and once anneals, Zhi Houzai Secondary cold-rolling is carried out with drafts 65%, obtains final cold rolling thin plate.
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CN111944952A (en) * 2020-08-17 2020-11-17 武安市裕华钢铁有限公司 Smelting and rolling process for hot-rolled coil plate of titanium microalloy pipeline steel
CN113042532A (en) * 2021-03-12 2021-06-29 武汉钢铁有限公司 Bi-containing high magnetic induction oriented silicon steel hot-rolled strip steel edge quality control method
CN114134422A (en) * 2021-12-02 2022-03-04 武汉英杰寰宇贸易有限公司 Soft magnetic steel with excellent lamellar tearing resistance and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN111707698A (en) * 2020-07-16 2020-09-25 西安交通大学 Experimental device and test method for high-temperature calcination reaction characteristics in flow and temperature cooperative alternating heating mode
CN111944952A (en) * 2020-08-17 2020-11-17 武安市裕华钢铁有限公司 Smelting and rolling process for hot-rolled coil plate of titanium microalloy pipeline steel
CN113042532A (en) * 2021-03-12 2021-06-29 武汉钢铁有限公司 Bi-containing high magnetic induction oriented silicon steel hot-rolled strip steel edge quality control method
CN114134422A (en) * 2021-12-02 2022-03-04 武汉英杰寰宇贸易有限公司 Soft magnetic steel with excellent lamellar tearing resistance and preparation method thereof

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