CN102199721B - Manufacture method of high-silicon non-oriented cold-rolled sheet - Google Patents
Manufacture method of high-silicon non-oriented cold-rolled sheet Download PDFInfo
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Abstract
The invention relates to a high-silicon non-oriented cold-rolled sheet, and a manufacture method thereof. The high-silicon non-oriented cold-rolled sheet comprises the following components in percentage by weight: not more than 0.01% of C, 4.5-7% of Si, not more than 2% of Mn, not more than 0.5% of Al, not more than 0.1% of P, not more than 0.01% of S, not more than 0.01% of N, not more than 0.02% of O, not more than 0.08% of B and the balance of Fe and inevitable impurities. The invention employs a strip continuous casting process to directly produce 1-5 mm cast strips, acquires stripe steel with certain grain size and structure through controlling solidifying and cooling processes and online hot rolling, and produces a high-performance non-oriented high-silicon cold-rolled sheet through sequent processes of annealing, warm rolling, cold rolling, finished product annealing, etc.
Description
Technical field
The present invention relates to the manufacture method of cold rolling non-orientation silicon steel thin plate, particularly high silicon non-oriented cold-rolled sheet and the manufacture method thereof of a kind of silicon content 4-7%.
Background technology
Silicon steel is a kind of important soft magnetic materials, account for the 90-95% of magneticsubstance total amount, b referred to as again electrical steel, it is one of base mateiral of development electric power and telecommunication industry, being used to make motor, transformer and ballast iron core and various electric elements, is indispensable important non-retentive alloy in electric power, electronics and the war industry.Silicon steel is divided into again oriented silicon steel and non orientating silicon steel; Non orientating silicon steel can be divided into cold rolling non-orientation silicon steel and hot rolling non orientating silicon steel.The hot rolling non orientating silicon steel mainly is cold rolling non-orientation silicon steel seldom at present.
High-frequency apparatus is increasing in recent years, but along with the development of high frequency, iron loss increase and magnetostriction have occurred and the noise problem brought.As everyone knows, the silicone content in the siliconized plate is very large on characteristic (as: magnetic induction density and the iron loss) impact of its product.Studies show that: along with the increase of silicone content, the resistivity of siliconized plate increases, and eddy losses reduces, thereby shows good magnetic under upper frequency.When the about 6.5wt% of Si, resistivity is 82 μ Ω cm, and saturation magnetostriction constant is almost nil, and it is the highest that maximum permeability reaches, and it is minimum that iron loss reaches, and magnetocrystalline anisotropy constant is about 3wt%Si silicon steel half.So the Fe-Si alloy that contains the about 6.5wt% of Si has good soft magnetic performance.But, along with the increase of Si content, especially when surpassing after 5%, because B2 or DO3 (Fe
3Si) appearance of ordered phase, alloy become not only firmly but also are crisp, are typical transgranular fracture, and machining property is sharply worsened, and suitability for industrialized production is very difficult.
The production method of typical high silicon steel mainly contains at present:
1. traditional technology has been developed three and has been rolled method.Molten steel casting is become strand, through hot rolling, warm-rolling, the high silicon steel of cold rolling production.The main drawback of the method is that technical process is long, because strand is thicker, the hot rolling thinning process is easy to occur crackle, and production stability is poor.
2. rapid solidification.Solve the work brittleness problem of high-silicon alloy system by the fast solidification technology of alloy.Typical technique is by single roller Quench method, and chilling band method processed is produced the band steel of 0.03-0.1mm.Perhaps produce the thick strip of 100～400um by two roller Quench.The subject matter of the method is that productivity is low, can't form the suitability for industrialized production scale.And the strip of producing is owing to be as-cast structure, the tape thickness lack of homogeneity.
3. siliconising method-CVD technique.Mainly be to utilize the surface of traditional orientation and non-oriented silicon steel sheet and the high-temperature chemical reaction between the silicide, Si is enriched on the siliconized plate, obtain the product of high silicon.This is to make up to now the most ripe technique of high silicon.This technical process is complicated, needs special equipment, can't carry out on traditional production line.
Chinese patent CN200610125541.2 relates to a kind of preparation method of low carbon and high silicon silicon plate, adopts sputtering method that different targets alternately or are simultaneously deposited on the base material two sides; Chinese patent CN200610114114.4 discloses a kind of employing continuous magnetron sputtering physical vapor deposition and has prepared Fe-6.5wt%Si thin plate method, and the method is carried out silicon deposited film at the low-silicon steel belt surface, prepares the plated film steel band and carries out the High temperature diffusion processing; Chinese patent CN200610001793.4 discloses a kind of method that adopts the pack cementation silicon technology to prepare high-silicon electrical steel, by the processing parameter of control thermo-chemical treatment, thereby obtain to have low-loss, the silicon content of low magnetic hysteresis coefficient of dilatation, low-coercivity is about 6.5% high-silicon electrical steel; Chinese patent CN200610009613.7 discloses a kind of ultra-thin, large size, high-silicon silicon steel sheet by electron beam physical vapor deposition preparation method, adopts the high silicon steel raw material of beam bombardment+vapor deposition technique to prepare stalloy.
Chinese patent CN200310115098.7 discloses a kind of Fe that adopts traditional rolling technology to prepare intermetallic compound base soft magnetic materials-boracic, titanium, zirconium, vanadium
3The method of Si base alloy ultra thin plate, the elements such as a certain amount of B, Ti, Zr have been added in the alloy, adopt the measures such as ingot casting annealing, control forging, hot rolling, hot-rolled sheet annealing, warm-rolling temperature and time, that successfully prepares thickness and be 0.10～0.30mm contains the basic latten of Fe3Si; Chinese patent CN200710099130.5 discloses a kind of adopt in the high silicon steel to be added the B element and carries out hot rolling, the quick preparation method that combines of cooling and warm-rolling technique; Chinese patent CN200410004404.4 discloses the technology that a kind of Fe14Si2 of preparation is basic ordered alloy thin plate, successfully falls low-alloyed brittle-ductile transition temperature by plasticization process progressively, improves the stretching plastic of latten.Chinese patent CN200480017919.6 relates to a kind of method of non-oriented electrical steel, and 1150 ℃ of electrical steel volume specific resistance at least 20 μ Ω-cm, the peak value austenite volume fraction γ that the method adopts the hot rolling technology preparation be 5wt% at least.
Japanese Patent JP2001098325 has introduced and has contained 0.1～7%Si, 0.1～1.5%Mn, the rolling technology of the silicon steel of 0.1～2.5%Al.
The principal character of above-mentioned patent all is to be cast into first ingot casting, carries out the techniques such as hot rolling warm-rolling again.
Utilize low cost and the rapid solidification advantage of short flow process to produce the target that electrical steel is countries in the world metallargist pursuit.The sheet-band continuous casting and rolling technology, the principal feature of its production technique is exactly molten steel has the circulating cooling effect by a pair of inside Casting Roller, go out the thick Cast Strip of 1～5mm through direct pouring behind the rapid solidification, batch direct production after the online hot rolling of Cast Strip process a time and go out hot rolled coil.Have advantage at production cost, also be conducive to save energy and protection of the environment simultaneously.
Japanese Patent JP05279739A, JP05255753A disclose a kind of method of producing non orientating silicon steel with thin strap continuous casting.Its composition range is silicon 0.1～8%, technical process be Cast Strip through double roller casting 0.3～4mm through excess temperature greater than 1050 ℃ of hot rollings, the draft of hot rolling is less than 60%.The main characteristics of this technique are the methods that adopt chilling by 600～1000 ℃, reach the purpose of control grain fineness number and performance.Although it is very large that this patent has provided the scope of silicon, the high-content of silicon only has 3.15% in embodiment.When silicone content greater than 4% the time, silicon steel is especially when surpassing after 5%, because the appearance of B2 or DO3 (Fe3Si) ordered phase, alloy becomes not only firmly but also is crisp, be typical transgranular fracture, machining property is sharply worsened, in material behavior the difference of essence is arranged less than 4% with silicone content, and this patent does not embody silicon greater than 4% singularity.
Japanese Patent JP05279740A, JP06128642 disclose the method that a kind of thin strap continuous casting is produced high silicon non-oriented silicon steel.Its main composition is Si:4～8%, Al≤2%, and C≤0.05%, Mn≤2%, S≤0.01%, N≤0.01%, other element comprises Mn, P, B, Ni, Cr, Sb, Sn, Cu etc. be at least one element wherein.Its main technique is that then without the hot rolling direct cold rolling, cold rolling draft is 5%～40% by the Cast Strip of the tape thickness 0.56～0.62mm of strip production.Through 1050 ℃, the thermal treatment of 30s time reaches the purpose of producing high silicon non-oriented silicon steel again.The main technical characterictic of this patent be the tape thickness of casting out less than 1mm, the band thickness, setting rate is fast, achieves the goal by solidifying fine crystal.
The tape thickness that the present invention produces reaches the purpose of preparation thin strip cold greater than 1mm by alloying and follow-up technique.
Summary of the invention
The deficiency that exists for the above-mentioned traditional continuous casting and hot rolling mode of production and CSP mode, the object of the present invention is to provide a kind of high silicon non-oriented cold-rolled sheet and manufacture method thereof, adopt the thin band continuous casting technique direct production to go out the Cast Strip of 1～5mm, by to solidify, the control of process of cooling obtains band steel with certain grain-size and texture, through follow-up hot rolling, the operation such as cold rolling, produce high performance high silicon cold rolled sheet.
For achieving the above object, technical solution of the present invention is as follows.
High silicon non-oriented cold-rolled sheet, its composition weight percent is: C≤0.01%, Si:4.5～7%, Mn≤2%, Al≤0.5%, P≤0.1%, S≤0.01%, N≤0.01%, O≤0.02%, B≤0.08%, remaining Fe and inevitable impurity.
Further, also comprise Ti, Zr, V, one or more among Sb, Cu, Cr and the Ni, the content of individual element is no more than 0.5%, and total amount is no more than 1%, by weight percentage.
In the composition of the high silicon non-oriented cold-rolled sheet of the present invention:
Carbon: below 0.01%.Carbon is the element that hinders consumingly grain growth, causes that iron loss increases and magnetic aging.Surpass 0.01% and will bring serious burden to decarburization.
Silicon: 4.5～7%.Silicon is the important alloying element in the siliconized plate, and the electromagnetic performance of silicon steel is had obvious impact.When the about 6.5wt% of Si, resistivity is 82 μ Ω cm, and saturation magnetostriction constant is almost nil, and it is the highest that maximum permeability reaches, and it is minimum that iron loss reaches, and magnetocrystalline anisotropy constant is about 3wt%Si silicon steel half.So the Fe-Si alloy that contains the about 6.5wt% of Si has good soft magnetic performance.But, along with the increase of Si content, especially when surpassing after 5%, because the appearance of B2 or DO3 (Fe3Si) ordered phase, alloy become not only firmly but also are crisp, are typical transgranular fracture, machining property is sharply worsened, and very poor in processability makes follow-uply rollingly to become very difficult.
Manganese: less than 2%.Manganese mainly improves the condition of surface of electrical steel, and effect and the sulphur content of manganese have substantial connection, and manganese and sulphur form MnS, can prevent from forming the caused hot-short phenomenon of low-melting FeS along crystal boundary.Manganese content is higher than 2% will make the cracking of steel plate processibility.
Aluminium: less than 0.5%.Aluminium is to increase the resistance element, is the most important alloying element of electrical steel.The effect of aluminium in iron is similar to silicon, dwindles the austenitic area and impels grain growth, can improve volume specific resistance, reduces iron loss, improves hardness.
Phosphorus: less than 0.2%.In steel, add certain phosphorus and can improve the processibility of steel plate, but when surpassing 0.2%, make on the contrary the cracking of steel plate cold-workability.
Sulphur: below 0.01%.Surpass 0.01% the S compound amount of separating out such as MnS will be increased greatly, strongly hinder grain growth, iron loss is deteriorated.
Oxygen: below 0.02%.Oxygen forms SiO
2, Al
2O
3With the oxide inclusion such as MnO, surpass 0.02% the oxide inclusion amount will be increased greatly, strongly hinder grain growth, make simultaneously be mingled with cause demagnetizing field increase, iron loss and magnetic strength are deteriorated.
Nitrogen: below 0.01%.Nitrogen is harmful element, and coercive force is raise, and permeability reduces.Surpass 0.01% the nitride amount of separating out such as ALN will be increased greatly, strongly hinder grain growth, iron loss is deteriorated.
Boron: less than 0.08%.The distribution of boron in the body-centered cubic structure intermetallic compound has significant impact to its deformability.The essence that boron improves plasticity is to have reduced the reverse domain boundary energy of this compound, simultaneously, and Fe
3The as-cast structure of Si base alloy has obtained obvious refinement by adding suitable B.Thereby make Fe
3Can not rolling ultimate temperature reducing of Si base alloy, it is cold rolling to help realization.
Other elements: also comprise Ti in the composition, Zr, V, one or more among Sb, Cu, Cr and the Ni, the content of individual element is no more than 0.5%, and total amount is no more than 1%.Can improve the texture of production board.But after content increases, magnetic is reduced.
The manufacture method of high silicon non-oriented cold-rolled sheet as claimed in claim 1 of the present invention, it comprises the steps:
1) by claim 1 or 2 abundant smelting;
2) thin strap continuous casting, molten steel has the crystallization roll of circulating cooling effect by a pair of inside, goes out the thick Cast Strip of 1～5mm through direct pouring behind the rapid solidification;
3) secondary cooling, after casting out from crystallization roll in the Cast Strip, through confined chamber, at airtight indoor location secondary cooling apparatus, speed of cooling is preferably greater than 50 ℃/s greater than 30 ℃/s; Gas cooling is adopted in the secondary cooling, and cooling gas is one or more mixed gas in argon gas, nitrogen or the helium;
4) hot rolling, the present invention can be through hot rolling with without two kinds of techniques of hot rolling, and the hot rolling draft is not more than 15%, preferably less than 15%, 1050～1200 ℃ of hot-rolled temperatures;
5) three coolings, speed of cooling is not more than 15 ℃/s;
6) batch, coiling temperature is greater than 780 ℃;
7) annealing, coil of strip is put after reeling machine unloads volume to holding furnace, and annealing temperature is greater than 780 ℃;
8) pickling,
9) warm-rolling, according to the thickness of product, main purpose is to carry out attenuate, and is can a time cold rolling or with the multi-pass warm-rolling of process annealing, 350～600 ℃ of rolling temperature scopes;
10) cold rolling, after the certain plasticity of reaching of material, according to the requirement of product final thickness, it is cold rolling to carry out multi-pass;
11) finished products further carries out the final annealing processing to casting and rolling steel band, and the temperature of annealing is higher than 850 ℃, but is lower than 1080 ℃, and annealing temperature preferably is higher than 950 ℃; Annealing is for example carried out in hydrogen or the hydrogen nitrogen mixture body at controlled atmosphere.
Further, step 7) batch rear coil of strip and do not anneal, coil of strip directly cools off, and rate of cooling is sent pickling again less than 0.01 ℃/s.
In manufacture method of the present invention:
Casting, molten steel has the crystallization roll of circulating cooling effect by a pair of inside, goes out the thick Cast Strip of 1～5mm through direct pouring behind the rapid solidification.This step 1 aspect will be rapidly solidificated into molten steel the Cast Strip of certain thickness specification in crystallization roll.
The secondary cooling, after casting out from crystallization roll in the Cast Strip, through confined chamber, at airtight indoor location secondary cooling apparatus, the speed of cooling with the control Cast Strip makes its speed of cooling greater than 30 ℃/s.This is because the Cast Strip is very fast at the high temperature grain growth, must control the speed of grain growth.Secondary cooling of the present invention is comprised of gas jets and support etc., and its pressure, flow and position can regulation and controls.Cooling gas can be the rare gas elementes such as argon gas, nitrogen, helium, or several mixed gas.Apart from the distance of Cast Strip, and gas type, ratio, flow, pressure etc. are realized the control to the Cast Strip speed of cooling by the control support.Preferred speed of cooling is greater than 50 ℃/s.
Hot rolling, the present invention can be through hot rolling with without two kinds of techniques of hot rolling.The draft of hot rolling is not more than 15%.1050～1200 ℃ of hot-rolled temperatures.If the hot rolling draft is greater than 15%, then hot rolling technology can make silicon steel generation recrystallize, makes in the as cast condition favorable texture destroyed, because limit section and core temperature are inhomogeneous, the recrystallized structure after the hot rolling can be inhomogeneous simultaneously, and this causes the unstable properties of product.Being not more than 15% hot rolling purpose is smooth effect, improves plate shape and the thickness difference of Cast Strip, is not for the attenuate Cast Strip or improves internal soundness.Preferred draft is less than 15%.
Three coolings, speed of cooling is not more than 15 ℃/s.Along with the increase of silicone content, steel grade fragility increases mutually, is easy to form surface crack, especially under the condition of fast cooling, in order to improve surface quality, reduces crackle and occurs, and takes Slow cooling.The present invention adopts the air cooling mode to carry out.
Batch, coiling temperature is greater than 780 ℃.When coiling temperature is low, crack easily.In the process of batching, high coiling temperature can reach the effect that further slows down rate of cooling.
Annealing, coil of strip is put after reeling machine unloads volume to holding furnace, and temperature is greater than 780 ℃.The main purpose of rolling postheat treatment is that material is softened, and puies forward heavy alloyed performance, and it is rolling to be beneficial to follow-up further cooling.This be because under the hot rolling ratio hour, dynamic recrystallization does not occur in crystal grain, during annealing, material generation Static Recrystallization is controlled suitable annealing temperature and annealing time, just can obtain tiny grain structure.After the annealing, material is processed under the cold deformation condition, has certain plasticity.
Pickling is prevailing phosphorus removing method.One or more inorganic aqueous acids carry out matting to the metallic surface to be processed.
Warm-rolling, its main purpose are improve material moulding, reach the effect of attenuate.According to the thickness requirement of product and the composition of steel grade, can a time cold rolling or with the multi-pass warm-rolling of process annealing, 350～600 ℃ of rolling temperature scopes.
Cold rolling, after the certain plasticity of reaching of material, according to the requirement of product final thickness, it is cold rolling to carry out multi-pass.
Finished products further carries out the final annealing processing to casting and rolling steel band, in anneal, obtains desired magnetic property.The temperature of annealing is higher than 850 ℃, but is lower than 1080 ℃; Preferred version is higher than 950 ℃; Annealing is for example carried out in hydrogen or the hydrogen nitrogen mixture body at controlled atmosphere.
Need to prove, be owing to formed the fragility phase of Fe3Si in the high silicon for the difficult point of high silicon steel production so that follow-up can't rolling and processing.
Key point of the present invention is exactly by Composition Design and corresponding manufacturing process, improves the moulding of material.Adding B is exactly the as-cast structure for the refinement thin strap continuous casting; The speed of cooling of control secondary cooling is greater than 50 ℃/s in the manufacturing process simultaneously, and its purpose also is refine austenite crystal grain, and grain refining not only can improve the intensity of material, can also effectively improve the moulding of material.The zone of three coolings is Fe3Si order-disorder transition temperature ranges, is not more than 15 ℃/s by the control speed of cooling, reduces separating out of fragility phase, reduces the generation of surface crack.For the ratio of the middle favorable texture that improves non orientating silicon steel, control hot rolling draft is not more than 15%, keeps texture in the tissue of Cast Strip.In addition, also by adding Ti, Zr, V, Sb, Cu, Cr and Ni, further improved texture in the composition of the present invention.
Beneficial effect of the present invention
(1) because silicone content is high, especially when surpassing after 5%, because the appearance of B2 or DO3 (Fe3Si) ordered phase, alloy becomes not only firmly but also is crisp, is typical transgranular fracture, and the hot rolling difficulty is very large, can cause cracking.
Compare with traditional technique, the present invention directly with the thin strap continuous casting thin gauge strip of can casting, has reduced hot-rolled process, has avoided the hot rolling cracking.Reduce equipment loss, reduced the maintenance of the equipment cost of overhaul.Simultaneously, thin strap continuous casting direct pouring the Cast Strip in column crystal in the as-cast structure be favorable texture face characteristics, improved performance.
(2) the present invention has relaxed the composition range that non orientating silicon steel is smelted by the characteristics of thin strap continuous casting rapid solidification, has reduced smelting cost.
(3) technical process of the present invention is short, energy consumption is low, efficient is high, production cost is low, manufacture method is simple, it is obvious to save energy and reduce the cost.
Description of drawings
Fig. 1 is the sheet-band continuous casting and rolling unit process flow diagram that the present invention relates to;
Fig. 2 is the process flow diagram that non orientating silicon steel cold rolled sheet of the present invention is made.
Embodiment
The present invention is further elaborated with embodiment for the below.
The manufacturing process of non orientating silicon steel cold rolled sheet is in the present embodiment: behind process converter or electrosmelting, the process refining procedure, smelt the molten steel that temperature and composition meet the demands, through twin-roll thin strip continuous casting, secondary cooling, hot rolling (being no more than 15%), cool off for three times, batch, annealing, warm-rolling, cold rolling, final finished annealing, obtain the high silicon plate of cold rolling non-orientation of the high-magnetic induction, low-iron loss of meeting consumers' demand.
As shown in Figure 1, behind process converter or electrosmelting, the process refining procedure, smelt the molten steel that temperature and composition meet the demands.The smelting molten steel composition that reaches the embodiment of the invention sees Table 1, and A, B, four compositions of C, D are arranged, and unit is weight percentage.
Molten steel from ladle 1 through long nozzle 2, tundish 3 and submerged nozzle 4 be poured into by the water-cooled crystallization roll 5 of two opposite direction rotatings, 5 ' and the molten bath 7 that forms of side seal board 6 in, form 1～5mm Cast Strip 8 through water-cooled crystallization roll 5,5 ' cooling, the Cast Strip is through secondary cooling apparatus 15 its speed of cooling of control in confined chamber 14, by swing guide 9, pinch roll 10 hot rolls 11 is delivered in Cast Strip 8, again through three refrigerating units 12, until reeling machine 13.Gas in the confined chamber 14 is the protective atmosphere of rare gas element.The secondary cooling is comprised of gas jets and support etc., and its pressure, flow and position can regulation and controls.Cooling gas can be the rare gas elementes such as argon gas, nitrogen, helium, or the mixed gas of several gases.Be cooled to air cooling three times.After coil of strip taken off from reeling machine, directly be transported in the holding furnace, then annealing pass through the techniques such as a time or multi-pass warm-rolling, final finished annealing, obtains the high silicon plate of cold rolling non-orientation of the high-magnetic induction, low-iron loss of meeting consumers' demand.
Fig. 2 is seen in main technical process.In this flow process, can be without the hot rolling direct cold rolling; Also can be less than 15% hot rolling.Warm-rolling can a warm-rolling, also can take the multi-pass warm-rolling.Main processing parameter sees Table 2.
Embodiment 1
Adopt electric furnace or converter melting molten steel, through behind the refining procedure, be met the A composition requirement in the table 1, remaining is the molten steel of Fe, is cast into the Cast Strip.In process selection Fig. 2 flow process that A1 produces without hot rolling; The technological process of production of A2 selects in Fig. 2 flow process the hot rolling flow process is arranged.Main processing parameter and the performance of product see Table A1 and the A2 in 2.
Embodiment 2
Adopt electric furnace or converter melting molten steel, through behind the refining procedure, be met the B composition requirement in the table 1, remaining is the molten steel of Fe, is cast into the Cast Strip.In process selection Fig. 2 flow process that B1 produces without the hot rolling flow process; B2 selects to select among Fig. 2 that the hot rolling flow process is arranged, and main processing parameter and the performance of product see Table B1 and the B2 in 2.
Embodiment 3
Adopt electric furnace or converter melting molten steel, through behind the refining procedure, with the C composition requirement of satisfying in the table 1, remaining is the molten steel of Fe, is cast into the Cast Strip.In process selection Fig. 2 flow process that C1 produces without the hot rolling flow process; C2 selects among Fig. 3 the hot rolling flow process is arranged, and main processing parameter and the performance of product see Table C1 and the C2 in 2.
Embodiment 4
Adopt electric furnace or converter melting molten steel, through behind the refining procedure, with the D composition requirement of satisfying in the table 1, remaining is the molten steel of Fe, is cast into the Cast Strip.In process selection Fig. 2 flow process that D1 produces without the hot rolling flow process; D2 selects among Fig. 2 the hot rolling flow process is arranged, and main processing parameter and the performance of product see Table D1 and the D2 in 2.
Claims (6)
1. the manufacture method of high silicon non-oriented cold-rolled sheet, it comprises the steps:
1) smelt,
Smelt by following composition, the composition weight percent of high silicon non-oriented cold-rolled sheet is: C≤0.01%, Si:4.5～7%, Mn≤2%, Al≤0.5%, P≤0.1%, S≤0.01%, N≤0.01%, O≤0.02%, B≤0.08%, remaining Fe and inevitable impurity;
2) thin strap continuous casting, molten steel has the crystallization roll of circulating cooling effect by a pair of inside, goes out the thick Cast Strip of 1～5mm through direct pouring behind the rapid solidification;
3) secondary cooling is after casting out from crystallization roll in the Cast Strip, through confined chamber, at airtight indoor location secondary cooling apparatus, speed of cooling is greater than 30 ℃/s, and gas cooling is adopted in the secondary cooling, and cooling gas is one or more mixed gas in argon gas, nitrogen or the helium;
4) hot rolling is passed through in hot rolling or without two kinds of techniques of hot rolling, the hot rolling draft is not more than 15%, 1050～1200 ℃ of hot-rolled temperatures;
5) three coolings, speed of cooling is not more than 15 ℃/s;
6) batch, coiling temperature is greater than 780 ℃;
7) annealing, coil of strip is put after reeling machine unloads volume to holding furnace, and annealing temperature is greater than 780 ℃;
8) pickling,
9) warm-rolling, according to the thickness of product, main purpose is to carry out attenuate, and is cold rolling or with the multi-pass warm-rolling of process annealing, 350～600 ℃ of rolling temperature scopes with a time;
10) cold rolling, according to the requirement of product final thickness, it is cold rolling to carry out multi-pass;
11) finished products further carries out the final annealing processing to casting and rolling steel band, and the temperature of annealing is higher than 850 ℃, but is lower than 1080 ℃; Annealing is carried out in controlled atmosphere, namely carries out in hydrogen or the hydrogen nitrogen mixture body.
2. the manufacture method of high silicon non-oriented cold-rolled sheet as claimed in claim 1 is characterized in that, step 6) is batched the annealing that rear coil of strip does not carry out step 7).
3. the manufacture method of high silicon non-oriented cold-rolled sheet as claimed in claim 1 is characterized in that, secondary cooling speed of cooling is preferably greater than 50 ℃/s.
4. the manufacture method of high silicon non-oriented cold-rolled sheet as claimed in claim 1 is characterized in that, the hot rolling draft is preferably less than 15%.
5. the manufacture method of high silicon non-oriented cold-rolled sheet as claimed in claim 1 is characterized in that, the temperature of finished products annealing preferably is higher than 950 ℃.
6. the manufacture method of high silicon non-oriented cold-rolled sheet as claimed in claim 1 is characterized in that, described high silicon non-oriented cold-rolled sheet also comprises Ti, Zr, V, one or more among Sb, Cu, Cr and the Ni, the content of individual element is no more than 0.5%, and total amount is no more than 1%, by weight percentage.
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