CN106048392A - Method for producing semi-processed cold-rolled non-oriented electrical steel rotors and stators by thin slab continuous casting and rolling process - Google Patents
Method for producing semi-processed cold-rolled non-oriented electrical steel rotors and stators by thin slab continuous casting and rolling process Download PDFInfo
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- CN106048392A CN106048392A CN201610571549.5A CN201610571549A CN106048392A CN 106048392 A CN106048392 A CN 106048392A CN 201610571549 A CN201610571549 A CN 201610571549A CN 106048392 A CN106048392 A CN 106048392A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—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
- 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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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
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Abstract
A method for producing semi-processed cold-rolled non-oriented electrical steel rotors and stators by a thin slab continuous casting and rolling process comprises the following steps: step (1), iron water pretreatment; step (2), smelting with a converter: adding waste steel with the total weight of 12% in the converter, determining oxygen and discharging steel; step (3), argon blowing: adding a composite deoxidizing agent when the steel is discharged from the converter, and blowing argon in a whole process of discharging the steel from the converter; step (4), RH refining: feeding molten steel into a vacuum RH refining furnace for smelting; step (5), continuous casting; step (6), pickling and cold-rolling; step (7), annealing: annealing for 8-12 hours at the temperature of 650-750 DEG C after cold-rolling; step (8), aftertreatment. The motor rotors and stators which are manufactured by semi-processed cold-rolled non-oriented electrical steel have good electromagnetic property and processing property. Compared with motor rotors and stators manufactured by cold-rolled common non-oriented electrical steel, the motor rotors and stators which are manufactured by the semi-processed cold-rolled non-oriented electrical steel have the advantages of lower machinability, electromagnetic property and cost, and environmental friendliness.
Description
Technical field
The method that the present invention relates to non-oriented electrical steel rotor, stator, a kind of continuous casting and rolling technique of sheet bar
Produce semi-processed cold-rolled non-oriented electrical steel rotor, stator production method.
Background technology
Cold rolling electric due to its complex manufacturing, with high content of technology, production difficulty is big, investment is big, domestic have Wuhan Iron and Steel Plant,
A few steel mills such as Baosteel, Anshan iron and steel plant, Taiyuan Iron and Steel Co. can produce, and these producers all use the strand i.e. traditional handicraft of conventional thickness to carry out
Produce, but along with the large-scale commercial Application of continuous casting and rolling (CSP) technique, open another to electrical sheet production brand-new
Technique, external CSP produces the practice of electrical sheet and all shows with " 15 country's brainstorm project " initial achievements: in using CSP to produce
The non-oriented electrical steel of the low trade mark has significantly investment, cost and quality-advantage, along with the reality of National Sustainable Development Strategies
Execute, protection environment, the saving energy, be an important directions of current China development of iron & steel industry, use the half cold rolling nothing of technique to take
Replace hot rolling electrical steels to electrical sheet and possess significant energy-saving and environmental protection and cost advantage.
Summary of the invention
In sum, the present invention is necessary to provide a kind of continuous casting and rolling technique of sheet bar to produce non-oriented electricity
Work steel rotor, stator production method.
A kind of continuous casting and rolling technique of sheet bar produces semi-processed cold-rolled non-oriented electrical steel rotor, stator production method, bag
Include:
Step 1), molten iron pretreatment；
Step 2), converter smelting: converter add gross weight 12% steel scrap, and determine oxygen tap；
Step 3), Argon: add double deoxidizer, and omnidistance Argon in converter tapping process when converter tapping；
Step 4), RH refine: molten steel is sent into vacuum RH refining furnace smelt；
Step 5), continuous casting: molten steel casts 55-70mm heavy slab by thin-slab caster, and conticaster pulling rate is 3.0-
4.5m/min, continuous casting billet charging temperature >=850 DEG C, in stove, bringing-up section temperature is 1000-1150 DEG C, and slab tapping temperature is 980-
1120 DEG C, exit temperature at finishing is 860-920 DEG C, and coiling temperature is 680-720 DEG C, F1 reduction ratio >=50%, F1～F4 accumulates
Reduction ratio >=90%, F7 reduction ratio 15.6%, rolling as thickness is the hot rolled plate of 2-3mm；
Step 6), pickling and cold-rolling: until hot rolled plate temperature less than 60 DEG C with after through concentration for 30-150g/L chlorohydric acid pickling, acid
Bath temperature degree is 60-80 DEG C, and pickling time is the 60-120 second, removes impurity and the iron scale on coil of strip surface, then carries out cold rolling；
Step 7), annealing: after cold rolling through 650-750 DEG C anneal 8-12 hour；
Step 8), post processing: the coil of strip after annealing is through the smooth process of 2-10% elongation percentage, and straightening bundling, after bundling
Coil of strip is divided into billot on banding machine, and continuous punching on high velocity ram machine, punching speed is 150-500 time/min, produces electricity
Machine rotor, stator discrete piece, put into these rotors, stator in continuous annealing furnace, at N2Or N2+H2Protective atmosphere under, moving back
In stove, 700-900 DEG C carries out full annealing, then slow cooling to about 500-520 DEG C time be passed through water vapour, keep a period of time to carry out
Turn blue process, make the surface of punching form one layer of fine and close oxide-film as dielectric film, then lamination be fabricated to rotor for electromotor,
Stator.
Wherein, this specification is protected the percentage ratio of gas refer to the percentage by volume of gas.The percentage of each element in molten steel
Ratio refers to mass percent.
Wherein, described step 5) particularly as follows: molten steel casts 55-70mm heavy slab by thin-slab caster, conticaster draws
Speed is 3.0-4.5m/min, and continuous casting billet charging temperature >=850 DEG C, in stove, bringing-up section temperature is 1000-1150 DEG C, and slab goes out furnace temperature
Degree is for 980-1120 DEG C, and exit temperature at finishing is 860-920 DEG C, and coiling temperature is 680-720 DEG C, F1 reduction ratio >=50%, F1
～F4 accumulation reduction ratio >=90%, F7 reduction ratio 15.6%, rolling as thickness is the hot rolled plate of 2.5mm.
Wherein, described step 6) particularly as follows: until hot rolled plate temperature less than 60 DEG C with after through concentration for 30-150g/L hydrochloric acid acid
Washing, acid tank temperature is 60-80 DEG C, and pickling time is the 60-120 second, removes impurity and the iron scale on coil of strip surface, after pickling
Coil of strip cold continuous mill group rolling be thickness be the coil of strip of 0.50-0.55mm.
Wherein, described step 8) particularly as follows: coil of strip after Tui Huo is through the smooth process of 2-10% elongation percentage, straightening bundling, right
Coil of strip after bundling is divided into the billot of different in width on banding machine, and continuous punching on high velocity ram machine, punching speed is 150-
500 times/min, produce rotor for electromotor, stator discrete piece, these rotors, stator are put in continuous annealing furnace, at N2Or N2+
H2Protective atmosphere under, 700-900 DEG C carries out full annealing in the lehr, then slow cooling to about 500-520 DEG C time be passed through water and steam
Vapour, keeps a period of time to carry out process of turning blue, and makes surface one layer of fine and close oxide-film of formation of punching as dielectric film, then folds
Sheet is fabricated to rotor for electromotor, stator.
Wherein, described RH refine: molten steel is sent into vacuum RH refining furnace and smelts, the tapping when S content is less than 80ppm.
Wherein, the concrete grammar of described RH refine is: molten steel is sent into vacuum RH refining furnace smelt, according to liquid steel temperature,
Oxygen content and decarburization terminal steel sample ingredient carry out preliminary alloying, promote argon flow amount and control at 140-170m3/ h, is initially charged aluminum
Block deoxidation, then Al is adjusted to desired value, it is subsequently adding low-carbon ferromanganese, ferrophosphorus etc. and carries out composition initial adjustment, in the limit after alloy addition
Circulate 3 minutes under conditions of vacuum≤130Pa, thermometric, sample, determine oxygen.
This product process flow is: molten iron pretreatment → converter smelting → Argon → RH is concise → and CSP continuous casting → CSP heating
Stove → CSP hot continuous rolling → cold rolling → annealing → smooth bundling → point bar → punching → annealing → electromagnetic performance is checked → is packaged into
Storehouse.
Have employed vacuum RH stove to smelt.The core of this technique is to be taken off by C in molten steel first with RH vacuum degasser
Below 30ppm, the problem solving electrical sheet Molten Steel Cleanliness, and add the alloys such as Mn, Al and carry out alloying.Molten steel sets off at RH
Time general S should be less than 80ppm.
Wherein, described RH refine: molten steel is sent into vacuum RH refining furnace and smelts, and add the alloy such as low-carbon Mn, Al and carry out
Alloying so that molten steel composition [C]≤0.003%, [Si]≤0.10%, 0.60%≤[Mn]≤0.8%, [P]≤
0.015%, [S]≤0.008%, 0.25%≤[Al]≤0.4%, tapping temperature 1580 DEG C.
The core of CSP continuous casting process is to control molten steel increasing C from big bag during bag crystallizer and increase N, uses
Special middle covering agent and special ultralow C steel crystallizer protecting residue.Strand a size of 55～70 × 1000～1275mm, even
Casting casting speed control is 3.0～about 4.5m/min.
Hot rolling technology uses rational temperature schedule and reduction system.For ensureing that electrical sheet finished product obtains the crystal grain of roughening,
Heating-up temperature is 1000～1150 DEG C, and tapping temperature is 980～1120 DEG C, exit temperature at finishing 920～860 DEG C, coiling temperature
It it is 680～720 DEG C.Under hot rolling, system design should solve problem of both belt plate shape control and grain coarsening simultaneously, therefore
Before rolling, reduction ratio is controlled the maximum magnitude allowed at equipment, milling train F1 reduction ratio >=50%, F1～F4 by 3～4 passages
Accumulation reduction ratio >=90%, F7 passage uses little reduction ratio with adjustment plate shape and induction grain coarsening, reduction ratio≤15%.For making
The fine ferrite crystal grain being deformed into mutually after rolling has growing up the time of abundance, uses high coiling temperature, the most broken in order to be formed
Broken iron scale, acid cleaning process is in hgher efficiency, takes ultra-rapid cooling pattern after rolling.
Product surface iron scale is the finest and close, and easily produces broken, therefore uses chlorohydric acid pickling (HCl) acid strength to be
30～150g/L, use acid pickling promotor, descaling bath temperature 60～80 DEG C, pickling operating rate 150-200m/min, it is ensured that band
Steel quality control on the surface is good, trimming after pickling, and after cutting edge, sheared edge is smooth, impulse-free robustness, non-notch, stagnation pressure during cold rolling
Lower rate should be greater than 75%, uses forebay heavy reduction rate (more than 35%), last frame reduction ratio≤8%.Use simultaneously and alter
Roller, roller, convex roller control to improve plate shape.
Carrying out recrystallization annealing in bell furnace, annealing temperature controls at 650～750 DEG C, and temperature retention time controls 8～12
Hour.Cold-reduced sheet after annealing carries out 2～10% smooth extension at skin pass mill group, carries out straightening bundling.
Coil of strip after bundling is carried out bundling on banding machine, is cut into rotor, the width of stator requirement, at a high speed
Carrying out continuous punching sheet on punch press, punching speed is 150～500 times/min.
At N2Or N2+H2Protective atmosphere under, in continuous annealing furnace, 700～900 DEG C carry out full annealing, then slow cooling is arrived
It is passed through water vapour when about 450 DEG C, keeps a period of time to carry out process of turning blue, make the surface of punching form one layer of fine and close oxide-film
As dielectric film, then lamination makes iron core.
Comparing prior art, the semi-processed cold-rolled non-oriented electrical steel of manufacture of the present invention has the advantage that
Use continuous casting and rolling technique of sheet bar to produce semi-processed cold-rolled non-oriented electrical steel cost of investment ratio and use tradition work
Skill low 20～30%.
Properties of product are stable, and surface quality, strip shape quality, dimensional accuracy are good, are up to state standards and customer requirement.
Product processing performance is good excellent.
The trade mark of the present invention is BD600 (50WB800), and thickness is 0.50mm semi-processed cold-rolled non-oriented electrical steel, product
Electromagnetic performance P15/50≤4.5W/kg, magnetic induction density B 50 >=1.72T, with current half-technique non oriented electrical steel national standard
Contrast, the low 1.5W/kg of iron loss, magnetic induction height 0.02T
The continuous casting and rolling technique of sheet bar that the present invention produces produces semi-processed cold-rolled non-oriented electrical steel rotor, stator has
Good electromagnetic performance and processing performance, the rotor for electromotor, the stator that make with cold rolling common non-oriented electrical steel compare and have
Lower processing characteristics, electromagnetic performance, cost, environment-friendly advantage.
Detailed description of the invention
Below in conjunction with some detailed description of the invention, the present invention is described further.Specific embodiment is the most specifically
The bright present invention, non-limiting protection scope of the present invention.
Term illustrates: RH refine full name is RH vacuum circulation degassing purifying method.
Embodiment 1
A kind of continuous casting and rolling technique of sheet bar produces semi-processed cold-rolled non-oriented electrical steel rotor, stator production method, real
Executing step is:
Step 1), molten iron pretreatment: pour in ladle by blast-melted, carry out blowing magnesium desulfurization by molten iron pretreatment；
Step 2), converter smelting: oxygen top bottom blowing converter, the molten steel after desulfurization is poured at the bottom of oxygen top compound blowing
Refining converter, adds the steel scrap accounting for gross weight 12% in converter simultaneously, adds limestone, firefly in converting process in Converter
Stone, when molten steel composition [C]≤0.06%, [P]≤0.04%, [S]≤0.15%, when Molten Steel End Point is 1680 DEG C, determines oxygen
Tapping；
Step 3), Argon: add double deoxidizer, and omnidistance Argon in converter tapping process when converter tapping, blow
Measure liquid steel temperature after argon, determine oxygen, sampling, in molten steel, feed aluminum steel according to steel oxygen content in water；
Step 4), RH concise: molten steel is sent into RH refining furnace smelting, and adds the alloy such as low-carbon Mn, Al and carry out alloying, refining
Make molten steel composition [C]=0.002%, [Si]=0.08%, [Mn]=0.7%, [P]=0.012%, [S]=0.006%,
[Al]=0.35%, tapping temperature 1580 DEG C；Its concrete method is: molten steel is sent into vacuum RH refining furnace and smelts, according to steel
Coolant-temperature gage, oxygen content and decarburization terminal steel sample ingredient carry out preliminary alloying, promote argon flow amount and control at 140-170m3/ h,
Being initially charged aluminium block deoxidation, then Al is adjusted to desired value, be subsequently adding low-carbon ferromanganese, ferrophosphorus etc. and carry out composition initial adjustment, alloy adds
After circulate 3 minutes under conditions of final vacuum≤130Pa, thermometric, sample, determine oxygen, if initial adjustment composition is not reaching to steel grade
Requirement, then carry out trimming；
Step 5), continuous casting: molten steel casts 70mm heavy slab by thin-slab caster, and conticaster pulling rate is 3.8m/min,
Continuous casting billet charging temperature >=850 DEG C, in stove, bringing-up section temperature is 1120 DEG C, and slab tapping temperature is 1080 DEG C, finish rolling outlet temperature
Degree is 880 DEG C, and coiling temperature is 700 DEG C, F1 reduction ratio 53.2%, F2 reduction ratio 50.3%, F7 reduction ratio 12.6%, rolls and is
Thickness is the hot rolled plate of 2.5mm；
Step 6) pickling and cold-rolling: until hot rolled plate temperature less than 60 DEG C with after through concentration for 70g/L chlorohydric acid pickling, acid tank temperature
Being 75 DEG C, pickling time is 75 seconds, removes impurity and the iron scale on coil of strip surface, by coil of strip cold continuous mill group after pickling
Rolling is the coil of strip of 0.52mm for thickness；
Step 7), annealing: after cold rolling through 680 DEG C anneal 12 hours；
Step 8), post processing: the coil of strip after annealing is through the 5% smooth process of elongation percentage, and straightening bundling, to the coil of strip after bundling
Being divided into the billot that width is 64mm on banding machine, continuous punching on high velocity ram machine, punching speed is 320 times/min, produces
Go out rotor for electromotor, stator discrete piece, these rotors, stator are put in continuous annealing furnace, at N2Or N2+H2Protective atmosphere under,
780 DEG C carry out full annealing in the lehr, then slow cooling to about 520 DEG C time be passed through water vapour, keep a period of time to turn blue
Processing, make surface one layer of fine and close oxide-film of formation of punching as dielectric film, then lamination is fabricated to rotor for electromotor, determines
Son.
The semi-processed cold-rolled non-oriented electrical steel rotor of the method production, stator, its iron loss is 4.2W/kg, and magnetic induction is strong
Degree is 1.72T, and user can be according to for motor manufacturing, owing to not having coating, having the good feature of environmental protection with directly buying
And cost advantage.
Embodiment 2
A kind of continuous casting and rolling technique of sheet bar produces semi-processed cold-rolled non-oriented electrical steel rotor, stator production method, its
Implementing step is:
Step 1), molten iron pretreatment: pour in ladle by blast-melted, carry out blowing magnesium desulfurization by molten iron pretreatment；
Step 2), converter smelting: oxygen top bottom blowing converter, the molten steel after desulfurization is poured at the bottom of oxygen top compound blowing
Refining converter, adds the steel scrap accounting for gross weight 12% in converter simultaneously, adds limestone, firefly in converting process in Converter
Stone, when molten steel composition [C]≤0.06%, [P]≤0.04%, [S]≤0.15%, when Molten Steel End Point is 1680 DEG C, determines oxygen
Tapping；
Step 3), Argon: add double deoxidizer, and omnidistance Argon in converter tapping process when converter tapping, blow
Measure liquid steel temperature after argon, determine oxygen, sampling, in molten steel, feed aluminum steel according to steel oxygen content in water；
Step 4), RH refine: molten steel is sent into vacuum RH refining furnace and smelts, and add the alloy such as low-carbon Mn, Al and close
Aurification so that molten steel composition [C]=0.003%, [Si]=0.09%, [Mn]=0.75%, [P]=0.015%, [S]=
0.008%, [Al]=0.38%, tapping temperature 1590 DEG C；Its concrete method is: molten steel is sent into the refining furnace smelting of vacuum RH
Refining, carries out preliminary alloying according to liquid steel temperature, oxygen content and decarburization terminal steel sample ingredient, promotes argon flow amount and controls at 140-
170m3/ h, is initially charged aluminium block deoxidation, then Al is adjusted to desired value, is subsequently adding low-carbon ferromanganese, ferrophosphorus etc. and carries out composition initial adjustment,
Alloy circulates 3 minutes after adding under conditions of final vacuum≤130Pa, thermometric, samples, determines oxygen, if initial adjustment composition does not has
Reach steel grade requirement, then carry out trimming；
Step 5), continuous casting: molten steel casts 70mm heavy slab by thin-slab caster, and conticaster pulling rate is 3.8m/min,
Continuous casting billet charging temperature >=850 DEG C, in stove, bringing-up section temperature is 1120 DEG C, and slab tapping temperature is 1080 DEG C, finish rolling outlet temperature
Degree is 880 DEG C, and coiling temperature is 680 DEG C, F1 reduction ratio 54.1%, F2 reduction ratio 51.2%, F7 reduction ratio 14.7%, rolls and is
Thickness is the hot rolled plate of 2.5mm；
Step 6) pickling and cold-rolling: until hot rolled plate temperature less than 60 DEG C with after through concentration for 70g/L chlorohydric acid pickling, acid tank temperature
Being 75 DEG C, pickling time is 75 seconds, removes impurity and the iron scale on coil of strip surface, by coil of strip cold continuous mill group after pickling
Rolling is the coil of strip of thickness 0.53mm；
Step 7), annealing: after cold rolling through 700 DEG C anneal 12 hours；
Step 8), post processing: after annealing, cold rolling coil is through the 8% smooth process of elongation percentage, and straightening bundling, to the coil of strip after bundling
Being divided into the billot that width is 64mm on banding machine, continuous punching on high velocity ram machine, punching speed is 200 times/min, produces
Go out rotor for electromotor, stator discrete piece, these rotors, stator are put in continuous annealing furnace, at N2Or N2+H2Protective atmosphere under,
780 DEG C carry out full annealing in the lehr, then slow cooling to about 500 DEG C time be passed through water vapour, keep a period of time to turn blue
Processing, make surface one layer of fine and close oxide-film of formation of punching as dielectric film, then lamination is fabricated to rotor for electromotor, determines
Son.
The semi-processed cold-rolled non-oriented electrical steel rotor of the method production, stator, its iron loss is 4.12W/kg, and magnetic induction is strong
Degree is 1.72T, and user can be according to for motor manufacturing, owing to not having coating, having the good feature of environmental protection with directly buying
And cost advantage.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description is made convert, or are directly or indirectly used in other relevant technology necks
Territory, is the most in like manner included in the scope of patent protection of the present invention.
Claims (7)
1. continuous casting and rolling technique of sheet bar produces semi-processed cold-rolled non-oriented electrical steel rotor, a stator production method, and it is special
Levy and be to include:
Step 1), molten iron pretreatment；
Step 2), converter smelting: converter add gross weight 12% steel scrap, and determine oxygen tap；
Step 3), Argon: add double deoxidizer, and omnidistance Argon in converter tapping process when converter tapping；
Step 4), RH refine: molten steel is sent into vacuum RH refining furnace smelt Al；
Step 5), continuous casting: molten steel casts 55-70mm heavy slab by thin-slab caster, and conticaster pulling rate is 3.0-4.5m/
Min, continuous casting billet charging temperature >=850 DEG C, in stove, bringing-up section temperature is 1000-1150 DEG C, and slab tapping temperature is 980-1120
DEG C, exit temperature at finishing is 860-920 DEG C, and coiling temperature is 680-720 DEG C, F1 reduction ratio >=50%, F1～F4 accumulates pressure
Rate >=90%, F7 reduction ratio 15.6%, rolling as thickness is the hot rolled plate of 2-3mm；
Step 6), pickling and cold-rolling: until hot rolled plate temperature less than 60 DEG C with after through concentration for 30-150g/L chlorohydric acid pickling, acid tank temperature
Degree is for 60-80 DEG C, and pickling time is the 60-120 second, removes impurity and the iron scale on coil of strip surface, then carries out cold rolling；
Step 7), annealing: after cold rolling through 650-750 DEG C anneal 8-12 hour；
Step 8), post processing: the coil of strip after annealing is through the smooth process of 2-10% elongation percentage, and straightening bundling, to the coil of strip after bundling
Being divided into the billot of different in width on banding machine, continuous punching on high velocity ram machine, punching speed is 150-500 time/min, raw
Output rotor for electromotor, stator discrete piece, put into these rotors, stator in continuous annealing furnace, at N2Or N2+H2Protective atmosphere
Under, 700-900 DEG C carries out full annealing in the lehr, then slow cooling to about 400-520 DEG C time be passed through water vapour, when keeping one section
Between carry out process of turning blue, make punching surface formed one layer of fine and close oxide-film as dielectric film, then lamination is fabricated to motor
With rotor, stator.
2. the method for claim 1, it is characterised in that:
Described step 5) particularly as follows: molten steel casts 55-70mm heavy slab by thin-slab caster, conticaster pulling rate is 3.0-
4.5m/min, continuous casting billet charging temperature >=850 DEG C, in stove, bringing-up section temperature is 1000-1150 DEG C, and slab tapping temperature is 980-
1120 DEG C, exit temperature at finishing is 860-920 DEG C, and coiling temperature is 680-720 DEG C, F1 reduction ratio >=50%, F1～F4 accumulates
Reduction ratio >=90%, F7 reduction ratio 15.6%, rolling as thickness is the hot rolled plate of 2-3mm.
3. method as claimed in claim 2, it is characterised in that:
Described step 6) particularly as follows: until hot rolled plate temperature less than 60 DEG C with after through concentration for 30-150g/L chlorohydric acid pickling, acid tank temperature
Degree is for 60-80 DEG C, and pickling time is the 60-120 second, removes impurity and the iron scale on coil of strip surface, by coil of strip after pickling with cold
Rolling Continuous mill train rolling is the coil of strip of 0.50-0.55mm for thickness.
4. method as claimed in claim 3, it is characterised in that:
Described step 8) particularly as follows: the coil of strip after Tui Huo is through the smooth process of 2-10% elongation percentage, straightening bundling, to the steel after bundling
Volume is divided into billot on banding machine, and continuous punching on high velocity ram machine, punching speed is 150-500 time/min, produces motor
By rotor, stator discrete piece, these rotors, stator are put in continuous annealing furnace, at N2Or N2+H2Protective atmosphere under, annealing
In stove, 700-900 DEG C carries out full annealing, then slow cooling to about 400-520 DEG C time be passed through water vapour, keep a period of time to carry out sending out
Blue process, makes surface one layer of fine and close oxide-film of formation of punching as dielectric film, and then lamination is fabricated to rotor for electromotor, determines
Son.
5. the method as described in claim 1-4 is arbitrary, it is characterised in that:
Described RH refine: molten steel is sent into vacuum RH refining furnace and smelts, and add the alloy such as low-carbon Mn, Al and carry out alloying, work as S
Content is less than tapping during 80ppm.
6. the method as described in claim 5 is arbitrary, it is characterised in that:
Described RH refine: molten steel is sent into vacuum RH refining furnace and smelts, and add the alloy such as low-carbon Mn, Al and carry out alloying, make
Molten steel composition [C]≤0.003%, [Si]≤0.10%, 0.60%≤[Mn]≤0.8%, [P]≤0.015%, [S]≤
0.008%, 0.25%≤[Al]≤0.4%, tapping temperature 1580 DEG C.
7. the method as described in claim 6 is arbitrary, it is characterised in that:
The concrete grammar of described RH refine is: molten steel is sent into vacuum RH refining furnace and smelts, according to liquid steel temperature, oxygen content and de-
Carbon terminal steel sample ingredient carries out preliminary alloying, promotes argon flow amount and controls at 140-170m3/ h, is initially charged aluminium block deoxidation, then
Al is adjusted to desired value, is subsequently adding low-carbon ferromanganese, ferrophosphorus etc. and carries out composition initial adjustment, alloy add after final vacuum≤
Circulate 3 minutes under conditions of 130Pa, thermometric, sample, determine oxygen.
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| CN113930678A (en) * | 2021-09-26 | 2022-01-14 | 包头钢铁（集团）有限责任公司 | Method for producing ultra-low carbon IF steel based on single RH vacuum treatment and CSP thin slab continuous casting and rolling process |
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