CN103066768B - Production craft utilizing semi-processed steel to produce motor rotor and motor stator - Google Patents
Production craft utilizing semi-processed steel to produce motor rotor and motor stator Download PDFInfo
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- CN103066768B CN103066768B CN201310000452.5A CN201310000452A CN103066768B CN 103066768 B CN103066768 B CN 103066768B CN 201310000452 A CN201310000452 A CN 201310000452A CN 103066768 B CN103066768 B CN 103066768B
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Abstract
The invention discloses a production craft utilizing semi-processed steel to produce a motor rotor and a motor stator. The production craft utilizing the semi-processed steel to produce the motor rotor and the motor stator mainly solves the technical problems of high energy consumption, severe pollution, high cost and the like in the prior art and comprises procedures such as molten steel smelting, continuous casting, hot rolling, cold rolling, stamping, annealing, splitting, stamping and annealing. Based on quality ratios, namely, C equal to or less than 0.01, P equal to or less than 0.015, S equal to or less than 0.012, Si equal to or less than 0.60 or equal to or more than 0.4, Mn equal to or less than 0.8 or equal to or more than 0.6 and AL equal to or less than 0.25 or equal to or more than 0.15, silicon iron, ferromanganese iron and alloy are added in a rationed mode to undergo alloying and then half-processed cold rolled non-orientation electrical steel comes into being. A cold-rolled plate is produced by undergoing cast steel plate (CSP) continuous casting, hot continuous casting and cold continuous casting, undergoes annealing treatment, flattening and stretching by a flattening set, tension leveling and bundling. Finished products can be obtained by shearing out, continuously stamping and annealing a rotor stamping or a stator stamping, wherein stress can be eliminated by annealing the rotor stamping or the stator stamping. The production craft utilizing the semi-processed steel to produce the motor rotor and the motor stator is mainly applied to motor iron core production.
Description
Technical field
The present invention relates to a kind of production technology of electric machine iron core, especially a kind of production technology that adopts half technique steel to produce rotor and stator core.
Background technology
Cold rolling electric is due to its complex manufacturing, with high content of technology, production difficulty is large, investment is large, domestic also only have Wuhan Iron and Steel Plant at present, Baosteel, Anshan iron and steel plant, a few steel mill such as Taiyuan Iron and Steel Co. can produce, it is that traditional handicraft is produced that these producers all adopt the strand of conventional thickness, but the large-scale commercial Application along with continuous casting and rolling (CSP) technique, to electrical sheet, produce and opened up another brand-new technique, practice and " 15 national brainstorm project " initial achievements that external CSP produces electrical sheet all show: adopt the non-oriented electrical steel of the low trade mark in CSP production to have obvious investment, cost and quality-advantage, enforcement along with National Sustainable Development Strategies, protection of the environment, energy savings, it is an important directions of current China development of iron & steel industry, adopting semi-processed cold-rolled non-oriented electrical steel to replace hot rolling electrical steels possesses energy-conservation significantly, environmental protection and cost advantage.And the production difficulty of silicon steel that adopts full technique is large and impurity is high, production cost is also very high.
Meanwhile, it is also a very important problem that the surface coating of silicon steel sheet/silicon steel sheet/electrical sheet is processed, and at present, cold rolling non-orientation silicon steel sheet/silicon steel sheet/electrical steel surface coating mainly comprises: organic coating, half inorganic coating, the large class of inorganic coating 3:
Described organic coating is on finished product electric steel plate, to apply one deck organic coating.Silicon steel sheet/silicon steel sheet face coat research of China is started late, and lags behind advanced international standard.The production firm of motor, transformer still adopts organic electrical steel coatings, has affected to a great extent Chinese electromechanical equipment competitiveness in the international market.The progress that develops into electrical steel surface coating technology of chemical industry provides wide prospect.China organic coating has experienced early stage pitch sky paint 1611#, and then develops into the phenolic paint 9162# of epoxy, and at present, applying maximum is dimethylbenzene acid modified alcoholic paint 9163#.Although it is good to apply the organic coating filming performance forming after these organic varnishes, there is better punching processability, but also exist many unsurmountable shortcomings, such as: (1) thick coating (10～15 μ m), weldability is poor, iron core overlapping coefficient low (92%).(2) coating heat-shrinkable is large, and iron core is easily loosening, poor dimensional stability.(3) coating hardness low (generally in 0.9 left and right), organic solvent toxicity is large, and price is high, easily causes waste and environmental pollution, affects the healthy of operator.(4) interface resistance reduces gradually with operation, if run into iron core local overheating, carbonization easily occurs, poor heat resistance.
So-called half inorganic coating is on finished product electric steel plate, to apply one deck containing the inorganic insulation coating of organic resin.We know that the inorganic insulation coating of using containing organic resin can provide lubrification for curing coating, thereby while being reduced in punching silicon steel sheet/silicon steel sheet, mould has the rate of wear.Phosphate, chromate inorganic solution can be mixed with organic resin solution phase.United States Patent (USP) 2793073 has disclosed a kind of insulating coating for silicon-coating steel disc/silicon steel sheet.The organic moiety of coating is by being selected from acrylic resin or copolymer, one or more of anhydrous maleic acid, Pioloform, polyvinyl acetal, amino resins, Lignosite, phenolic resins, vinylacetate, vinyl chloride and epoxy resin.Can add the organic granular material that granularity is greater than 2 μ m, for example: phenolic resins, melmacs etc. provide surface irregularity, and to obtain good weldability, the inorganic part of coating can comprise in phosphorus acid or chromium acid one or more.Phosphorus acid can comprise a kind of phosphate of calcium, magnesium, zinc, and titanium dioxide, glue alms bowl silicon dioxide, aluminium oxide and boric acid.Chromium acid can comprise a kind of bichromate of calcium, magnesium, zinc, and titanium dioxide, colloidal alumina and a kind of organic reducing agent.Silicon steel sheet/silicon steel sheet that this use half inorganic coating applies has good punching processability and anti-corrosive properties.But, in welding processing process, resin volatilization can produce too much pore, the welding pore producing for the volatilization making in this process because of resin is down to minimum, need in phosphate, the exhausted coating of chromate, add particle, but also have powder phenomenon-tion in the punching course of processing.Moreover, because this type coating contains solubility Cr VI, become chromate, thereby, in the coating of coating, the processing of coated steel plates, use and the disposal process of useless coating solution in can produce the problem aspect the environmental pollution of safety and high price.
Described inorganic coating is on finished product electric steel plate, to apply the insulating material that one deck is thin.Kind in application: waterglass, talcum, magnesium oxide, borax, phosphate, chromate etc.Wherein inorganic phosphate salt coating is principal item.Inorganic phosphate salt can provide good surface resistivity and thermal endurance for coating.But the film that can liquidate when punching lamination causes undue wearing and tearing, and be difficult for producing good tack with electric steel plate.United States Patent (USP) 2753203 has been reported a kind of phosphoric acid solution that contains 7%～50% free acid, the nearly cataloid of 150 mass parts and nearly the chromic anhybride solution of 25 mass parts, and this mixed liquor can be used for electrical sheet surface and forms inorganic insulation coating.
Total development trend is: organic coating is eliminated gradually, and inorganic coating will progressively replace half inorganic coating.But due to the conditionality of inorganic coating nature and each side, at present, electrical sheet manufacturer is used more half inorganic coating that remains conventionally in the world.
Summary of the invention
The object of this invention is to provide the production technology that rotor and stator are produced in a kind of energy-saving and environmental protection, processing performance is good, production cost is lower employing half technique steel.
The technical solution adopted for the present invention to solve the technical problems is: it comprises following operation: smelting molten steel, continuous casting, hot rolling, cold rolling, punching, annealing, itemize, punching and annealing, specifically comprise: molten iron preliminary treatment → converter smelting and omnidistance Argon → RH be concise → and CSP continuous casting → CSP heating furnace → CSP hot continuous rolling → pickling and cold rolling → annealing → smooth bundling → itemize → punching → annealing; In converter steelmaking process, C≤0.01 by mass percentage, P≤0.015, S≤0.012,0.4≤Si≤0.60,0.6≤Mn≤0.8,0.15≤AL≤0.25, all the other are the ratio of Fe, and press Si recovery rate 95%, Mn recovery rate 97%, Al recovery rate 35% is metered into ferrosilicon, ferromanganese and aluminium alloy and carries out alloying and make C≤0.01, P≤0.015, S≤0.012,0.4≤Si≤0.60,0.6≤Mn≤0.8,0.15≤AL≤0.25, all the other semi-processed cold-rolled non-oriented electrical steels that are Fe; Again after CSP continuous casting, CSP hot continuous rolling, etc. carrying out cold continuous rolling after cooling pickling, be made into cold-reduced sheet, to cold-reduced sheet, adopt annealing furnace to carry out after annealing in process, adopt smooth unit to carry out carrying out straightening bundling after 2 ~ 10% smooth extension, coil of strip after bundling carries out itemize cutting on banding machine, and cut and cut rotor or stator punching by rotor or stator specification requirement, on the punch press of rotor or stator punching, carry out after continuous punching, rotor or stator punching are carried out to the rotor or the stator punching that after stress relief annealing processing, get product.When adopting the vacuum metling of RH stove, utilize RH vacuum degasser that C in molten steel is taken off below 60ppm, and make the S of molten steel when going out RH stove be less than 100ppm; In described CSP casting process, pulling rate is controlled between 3.0～4.2m/min.
In described CSP during Hot Strip Rolling, controlling heating-up temperature is 1000～1150 ℃, and tapping temperature is 980～1120 ℃, 920～860 ℃ of finish rolling outlet temperatures, and coiling temperature is 620～660 ℃.
The above milling train of 5 passage is set, reduction ratio >=50% of the 1st road milling train F1, accumulation reduction ratio >=90% of 1st ~ 4 road milling train F1 ~ F4, reduction ratio≤20% of last 1 road milling train in described CSP during Hot Strip Rolling.
Described pickling and cold-rolling process comprise: hot rolling and cooling after be sent to descaling bath, at descaling bath, adopt the hydrochloric acid (HCl) that concentration is 30～150g/L to carry out pickling, in acid cleaning process, temperature is controlled at 80～100 ℃, pickling operating rate 100 ~ 180m/min, after pickling, carry out the above cold continuous rolling of 3 passage, make cold rolling total reduction be greater than 75%, reduction ratio >=35% of the 1st road milling train wherein, and reduction ratio≤10% of last 1 road milling train.In cold continuous rolling process, can adopt roll shifting, roller, protruding roller to control and improve plate shape.
Described cold-reduced sheet annealing process comprises: in bell type annealing furnace, carry out recrystallization annealing, annealing temperature is controlled at 650～750 ℃, and temperature retention time is controlled at 8～12 hours.It is to adopt vacuum nitrogen continuous annealing furnace that described stress relief annealing is processed; under the protective atmosphere of N2 or N2+H2; in continuous annealing furnace, 700～900 ℃ are carried out full annealing; when slow cooling is to approximately 450 ℃ again, pass into the water vapour processing of turning blue; make oxide-film that the surface of punching forms one deck densification as dielectric film, then lamination is made into rotor or stator core.
The invention has the beneficial effects as follows: adopt continuous casting and rolling technique of sheet bar to produce semi-processed cold-rolled non-oriented electrical steel cost of investment lower by 20～30% than adopting traditional handicraft.Properties of product are stable, and surface quality, strip shape quality, dimensional accuracy are good, can be up to state standards and customer requirement.Product good processability is good.If the trade mark of the experimental production of the present invention is BDGXB-2(50WB800), thickness is 0.50mm semi-processed cold-rolled non-oriented electrical steel, it is 5.12W/kg that product electromagnetic performance can reach P1.5/50, magnetic flux density is 1.712T, with current half-technique non oriented electrical steel national standard contrast, the low 2.88W/kg of iron loss, the high 0.012T of magnetic flux density.Adopt rotor for electromotor, the stator of the inventive method manufacture to have good electromagnetic performance and processing performance, rotor for electromotor, the stator made with cold rolling common non-oriented electrical steel relatively have lower processing characteristics, electromagnetic performance, cost, environment-friendly advantage.In sum, the feature such as that the present invention has is energy-conservation, reduction of discharging, environmental protection, and also processing performance is good, production cost is lower.It can be widely used in producing in the explained hereafter such as rotor and stator core.
Embodiment
Below in conjunction with embodiment, the present invention is described in further details.
Embodiment 1, it comprises following operation the present invention: smelting molten steel, continuous casting, hot rolling, cold rolling, punching, annealing, itemize, punching and annealing, specifically comprise: molten iron preliminary treatment → converter smelting and omnidistance Argon → RH be concise → and CSP continuous casting → CSP heating furnace → CSP hot continuous rolling → pickling and cold rolling → annealing → smooth bundling → itemize → punching → annealing; In converter steelmaking process, C≤0.01 by mass percentage, P≤0.015, S≤0.012,0.4≤Si≤0.60,0.6≤Mn≤0.8,0.15≤AL≤0.25, all the other are the ratio of Fe, and press Si recovery rate 95%, Mn recovery rate 97%, Al recovery rate 35% is metered into ferrosilicon, ferromanganese and aluminium alloy and carries out alloying and make C≤0.01, P≤0.015, S≤0.012,0.4≤Si≤0.60,0.6≤Mn≤0.8,0.15≤AL≤0.25, all the other semi-processed cold-rolled non-oriented electrical steels that are Fe; Again after CSP continuous casting, CSP hot continuous rolling, etc. carrying out cold continuous rolling after cooling pickling, be made into cold-reduced sheet, to cold-reduced sheet, adopt annealing furnace to carry out after annealing in process, adopt smooth unit to carry out carrying out straightening bundling after 2 ~ 10% smooth extension, coil of strip after bundling carries out itemize cutting on banding machine, and cut and cut rotor or stator punching by rotor or stator specification requirement, on the punch press of rotor or stator punching, carry out after continuous punching, rotor or stator punching are carried out to the rotor or the stator punching that after stress relief annealing processing, get product.When adopting the vacuum metling of RH stove, utilize RH vacuum degasser that C in molten steel is taken off below 60ppm, and make the S of molten steel when going out RH stove be less than 100ppm; In described CSP casting process, pulling rate is controlled between 3.0～4.2m/min.
The chemical Composition Control of semi-processed cold-rolled non-oriented electrical steel of the present invention is as shown in the table:
Table 1 Composition Design, W
t%
| The trade mark | C | P | S | Si | Mn | AL |
| BDGXB－2 | ≤0.01 | ≤0.015 | ≤0.012 | 0.4~0.60 | 0.60~0.8 | 0.15~0.25 |
CSP casting and rolling process of the present invention: the core of CSP continuous casting process be control molten steel from great Bao-increasing C in bag-crystallizer process and increase N, adopt special middle covering agent and special-purpose ultralow C steel crystallizer protecting residue.Strand is of a size of 70 * 1000～1275mm, and pulling speed of continuous casting is controlled at 3.0～4.2m/min left and right.
Hot rolling technology should adopt rational temperature schedule and reduction system.For guaranteeing that electrical sheet finished product obtains the crystal grain of alligatoring, in described CSP during Hot Strip Rolling, to control heating-up temperature and be preferably controlled at 1000～1150 ℃, tapping temperature is controlled at 980～1120 ℃, 920～860 ℃ of finish rolling outlet temperatures, coiling temperature is 620～660 ℃.
The above milling train of 5 passage is set in described CSP during Hot Strip Rolling, 7 road milling trains are preferably set.Reduction ratio >=50% of the 1st road milling train F1, accumulation reduction ratio >=90% of 1st ~ 4 road milling train F1 ~ F4, reduction ratio≤20% of the 7th road milling train F7.
Under hot rolling, system design should solve the problem of belt plate shape control and grain coarsening two aspects simultaneously, therefore front 3～4 passages in rolling are controlled at by reduction ratio the maximum magnitude that equipment allows, milling train F1 reduction ratio >=50%, F1 ~ F4 accumulates reduction ratio >=90%, F7 passage adopts little reduction ratio to adjust plate shape and induction grain coarsening, reduction ratio≤20%.For making to roll the rear tiny ferrite crystal grain being deformed into mutually, there is sufficient growing up the time, roll and coolingly should take back segment refrigerating mode afterwards.
Described pickling and cold-rolling process comprise: hot rolling and cooling after be sent to descaling bath, because of the tiny densification of product surface iron scale, and easily produce strip flaw, therefore should adopt hydrochloric acid to carry out pickling.At descaling bath, adopt the hydrochloric acid (HCl) that concentration is 30～150g/L to carry out pickling, in acid cleaning process, temperature is controlled at 80～100 ℃, and pickling operating rate 100 ~ 180m/min can guarantee that strip surface quality control is good, trimming after pickling, cut behind limit sheared edge smooth, without burr, non-notch.After pickling, carry out the above cold continuous rolling of 3 passage, make cold rolling total reduction be greater than 75%, reduction ratio >=35% of the 1st road milling train wherein, and reduction ratio≤10% of last 1 road milling train.In cold continuous rolling process, can adopt roll shifting, roller, protruding roller to control and improve plate shape.
Described cold-reduced sheet annealing and smooth bundling operation comprise: in bell type annealing furnace, carry out recrystallization annealing, annealing temperature is controlled at 650～750 ℃, and temperature retention time is controlled at 8～12 hours.Cold-reduced sheet after annealing carries out 2～10% smooth extensions at smooth unit, carries out straightening bundling.
Itemize of the present invention and punching operation: the coil of strip after bundling is carried out on banding machine to bundling, be cut into the width of rotor, stator requirement, carry out continuous punching sheet on high velocity ram machine, punching speed is 150 ~ 500 times/min.
It is to adopt vacuum nitrogen continuous annealing furnace that described stress relief annealing is processed; under the protective atmosphere of N2 or N2+H2; in continuous annealing furnace, 700～900 ℃ are carried out full annealing; when slow cooling is to approximately 450 ℃ again, pass into water vapour; keep a period of time processing of turning blue; make oxide-film that the surface of punching forms one deck densification as dielectric film, then lamination is made into rotor or stator core.
Embodiment 2, production technology of the present invention comprises: first by blast-melted, pour in ladle, by molten iron preliminary treatment, blow magnesium desulfurization, the converter of oxygen top bottom blowing, pour the molten steel after desulfurization the converter of into oxygen top bottom blowing, in converter, add the steel scrap that accounts for total weight 12% simultaneously, in converting process, in Converter, add lime stone, fluorite, converter adopts omnidistance bottom argon blowing technology when molten steel composition [C]≤0.06%, [P]≤0.04%, [S]≤0.15%, when Molten Steel End Point is 1680 ℃, determine oxygen tapping, when converter tapping, add double deoxidizer, omnidistance Argon in converter tapping process, after Argon, measure liquid steel temperature, determine oxygen, sampling, according to steel oxygen content in water, in molten steel, feed aluminum steel, molten steel is sent into the smelting of vacuum RH refining furnace and make molten steel composition [C]=0.004%, [Si]=0.4%, [Mn]=0.7%, [P]=0.015%, [S]=0.008%, [Al]=0.15%, 1580 ℃ of tapping temperatures, molten steel is cast 70mm heavy slab by thin-slab caster, conticaster pulling rate is 3.8m/min, continuous casting billet charging temperature>=850 ℃, in stove, bringing-up section temperature is 1120 ℃, slab tapping temperature is 1080 ℃, finish rolling outlet temperature is 880 ℃, coiling temperature is 640 ℃, F1 reduction ratio 53.2%, F2 reduction ratio 50.3%, F7 reduction ratio 15.6%, rolling is that thickness is the hot rolled plate of 2.5mm, it is 50～120g/L chlorohydric acid pickling that hot rolled plate temperature be take by concentration lower than 60 ℃, acid tank temperature is 85 ℃, pickling time is 95 seconds, remove impurity and the iron scale on coil of strip surface, by coil of strip after pickling, through cold continuous mill group rolling, be the thick coil of strip of 0.52mm, after cold rolling, through 700 ℃, anneal 12 hours, after annealing, cold rolling coil is through the smooth processing of 5% elongation, straightening bundling, coil of strip after bundling is divided into the billot that width is 25～120mm on banding machine, punching continuously on high velocity ram machine, punching speed is 180 times/min, produce rotor for electromotor, the stator sheet that falls apart, these rotors, stator is put into continuous annealing furnace, at N
2or N
2+ H
2protective atmosphere under, in annealing furnace, 780 ℃ are carried out full annealing, then slow cooling passes into water vapour during to approximately 450 ℃, keep a period of time processing of turning blue, make oxide-film that the surface of punching forms one deck densification as dielectric film, then lamination is made into rotor for electromotor, stator.All the other are with embodiment 1.
The semi-processed cold-rolled non-oriented electrical steel rotor, the stator that adopt this process to produce, its iron loss is less than 5.12W/kg, and magnetic flux density is greater than 1.72T, and user can be according to need with directly purchasing for motor manufacture, owing to there is no coating, there is the good feature of environmental protection and cost advantage.
Embodiment 3, by blast-melted, pour in ladle, by molten iron preliminary treatment, blow magnesium desulfurization, the converter of oxygen top bottom blowing, pour the molten steel after desulfurization the converter of into oxygen top bottom blowing, in converter, add the steel scrap that accounts for total weight 12% simultaneously, in converting process, in Converter, add lime stone, fluorite, converter adopts omnidistance bottom argon blowing technology when molten steel composition [C]≤0.06%, [P]≤0.04%, [S]≤0.15%, when Molten Steel End Point is 1680 ℃, determine oxygen tapping, when converter tapping, add double deoxidizer, omnidistance Argon in converter tapping process, after Argon, measure liquid steel temperature, determine oxygen, sampling, according to steel oxygen content in water, in molten steel, feed aluminum steel, molten steel is sent into the smelting of vacuum RH refining furnace and make molten steel composition [C]=0.004%, [Si]=0.45%, [Mn]=0.75%, [P]=0.015%, [S]=0.008%, [Al]=0.14%, 1590 ℃ of tapping temperatures, molten steel is cast 70mm heavy slab by thin-slab caster, conticaster pulling rate is 3.8m/min, continuous casting billet charging temperature>=850 ℃, in stove, bringing-up section temperature is 1120 ℃, slab tapping temperature is 1080 ℃, finish rolling outlet temperature is 880 ℃, coiling temperature is 640 ℃, F1 reduction ratio 54.1%, F2 reduction ratio 51.2%, F7 reduction ratio 14.7%, rolling is that thickness is the hot rolled plate of 2.5mm, it is 50～120g/L chlorohydric acid pickling that hot rolled plate temperature be take by concentration lower than 60 ℃, acid tank temperature is 85 ℃, pickling time is 95 seconds, remove impurity and the iron scale on coil of strip surface, by coil of strip after pickling, through cold continuous mill group rolling, be the thick coil of strip of 0.52mm, after cold rolling, through 700 ℃, anneal 12 hours, after annealing, cold rolling coil is through the smooth processing of 8% elongation, straightening bundling, coil of strip after bundling is divided into the billot that width is 25～120mm on banding machine, punching continuously on high velocity ram machine, punching speed is 200 times/min, produce rotor for electromotor, the stator sheet that falls apart, these rotors, stator is put into continuous annealing furnace, at N
2or N
2+ H
2protective atmosphere under, in annealing furnace, 780 ℃ are carried out full annealing, then slow cooling passes into water vapour during to approximately 450 ℃, keep a period of time processing of turning blue, make oxide-film that the surface of punching forms one deck densification as dielectric film, then lamination is made into rotor for electromotor, stator.All the other same above-described embodiments.
The semi-processed cold-rolled non-oriented electrical steel rotor, the stator that adopt this process to produce, its iron loss is less than 5.08W/kg, and magnetic flux density is greater than 1.72T, and user can be according to need with directly purchasing for motor manufacture, owing to there is no coating, there is the good feature of environmental protection and cost advantage.
Claims (6)
1. a production technology that adopts half technique steel to produce rotor and stator, it is characterized in that it comprises following operation: smelting molten steel, continuous casting, hot rolling, cold rolling, punching, annealing, itemize, punching and annealing, specifically comprise: molten iron preliminary treatment → converter smelting and omnidistance Argon → RH be concise → CSP continuous casting → CSP heating furnace → CSP hot continuous rolling → pickling and cold rolling → annealing → smooth bundling → itemize → punching → annealing; When adopting the vacuum metling of RH stove, utilize RH vacuum degasser that C in molten steel is taken off below 60ppm, and make the S of molten steel when going out RH stove be less than 100ppm; In described CSP casting process, pulling rate is controlled between 3.0～4.2m/min; In converter steelmaking process, C≤0.01 by mass percentage, P≤0.015, S≤0.012,0.4≤Si≤0.60,0.6≤Mn≤0.8,0.15≤AL≤0.25, all the other are the ratio of Fe, and press Si recovery rate 95%, Mn recovery rate 97%, Al recovery rate 35% is metered into ferrosilicon, ferromanganese and aluminium alloy and carries out alloying and make C≤0.01, P≤0.015, S≤0.012,0.4≤Si≤0.60,0.6≤Mn≤0.8,0.15≤AL≤0.25, all the other semi-processed cold-rolled non-oriented electrical steels that are Fe; Again after CSP continuous casting, CSP hot continuous rolling, etc. carrying out cold continuous rolling after cooling pickling, be made into cold-reduced sheet, to cold-reduced sheet, adopt annealing furnace to carry out after annealing in process, adopt smooth unit to carry out carrying out straightening bundling after 2 ~ 10% smooth extension, coil of strip after bundling carries out itemize cutting on banding machine, and cut and cut rotor or stator punching by rotor or stator specification requirement, on the punch press of rotor or stator punching, carry out after continuous punching, rotor or stator punching are carried out to the rotor or the stator punching that after stress relief annealing processing, get product; It is to adopt vacuum nitrogen continuous annealing furnace that described stress relief annealing is processed, at N
2or N
2+ H
2protective atmosphere under; in continuous annealing furnace, 700～900 ℃ are carried out full annealing; when slow cooling is to approximately 450 ℃ again, pass into the water vapour processing of turning blue, make oxide-film that the surface of punching forms one deck densification as dielectric film, then lamination is made into rotor or stator core.
2. adopt according to claim 1 half technique steel to produce the production technology of rotor and stator, it is characterized in that: in described CSP during Hot Strip Rolling, controlling heating-up temperature is 1000～1150 ℃, tapping temperature is 980～1120 ℃, 860～920 ℃ of finish rolling outlet temperatures, coiling temperature is 620～660 ℃.
3. adopt according to claim 1 half technique steel to produce the production technology of rotor and stator, it is characterized in that: the above milling train of 5 passage is set in described CSP during Hot Strip Rolling, reduction ratio >=50% of the 1st road milling train F1, accumulation reduction ratio >=90% of 1st ~ 4 road milling train F1 ~ F4, reduction ratio≤20% of last 1 road milling train.
4. adopt according to claim 1 half technique steel to produce the production technology of rotor and stator, it is characterized in that: described pickling and cold-rolling process comprise: hot rolling and cooling after be sent to descaling bath, at descaling bath, adopt the hydrochloric acid (HCl) that concentration is 30～150g/L to carry out pickling, in acid cleaning process, temperature is controlled at 80～100 ℃, pickling operating rate 100 ~ 180m/min, after pickling, carry out the above cold continuous rolling of 3 passage, make cold rolling total reduction be greater than 75%, reduction ratio >=35% of the 1st road milling train wherein, and reduction ratio≤10% of last 1 road milling train.
5. adopt according to claim 1 half technique steel to produce the production technology of rotor and stator, it is characterized in that: in cold continuous rolling process, adopt roll shifting or roller or protruding roller to control and improve plate shape.
6. adopt according to claim 1 half technique steel to produce the production technology of rotor and stator, it is characterized in that: described cold-reduced sheet annealing process comprises: in bell type annealing furnace, carry out recrystallization annealing, annealing temperature is controlled at 650～750 ℃, and temperature retention time is controlled at 8～12 hours.
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| CN103468907B (en) * | 2013-09-18 | 2015-01-14 | 济钢集团有限公司 | Method for producing cold-rolled non-oriented electrical steel based on ASP (AnGang Strip Production) medium thin slab continuous casting and rolling process |
| CN105779877B (en) * | 2014-12-23 | 2017-10-27 | 鞍钢股份有限公司 | Efficient production method of semi-processed non-oriented electrical steel |
| CN105779730A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Production method of semi-processed electrical steel |
| US10374497B2 (en) * | 2016-01-26 | 2019-08-06 | Tempel Steel Company | Method to manufacture improved exciter for an electrical generator |
| CN106048389A (en) * | 2016-07-18 | 2016-10-26 | 华南理工大学 | Production method of non-oriented electrical steel 50W800 by traditional hot continuous rolling process |
| CN106048390B (en) * | 2016-07-18 | 2018-12-21 | 华南理工大学 | A kind of production method of thin slab continuous casting and rolling production non-oriented electrical steel 50W800 |
| CN107119178A (en) * | 2017-05-03 | 2017-09-01 | 南通长江电器实业有限公司 | A kind of dynamo sheet annealing process |
| CN110212712B (en) * | 2017-07-15 | 2021-09-07 | 芜湖乾凯材料科技有限公司 | Low-stress motor iron core and preparation method thereof |
| CN108913852B (en) * | 2018-06-29 | 2020-08-21 | 首钢京唐钢铁联合有限责任公司 | Method for producing tin plate substrate based on cover-type annealing process |
| CN110385339B (en) * | 2019-06-12 | 2020-12-18 | 佛山职业技术学院 | Leveling method of semi-process steel |
| CN110819879A (en) * | 2019-11-22 | 2020-02-21 | 马鞍山钢铁股份有限公司 | Non-oriented silicon steel with excellent magnetic property and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3404377B2 (en) * | 1991-03-20 | 2003-05-06 | 株式会社日立製作所 | Rotor shaft for rotating electric machine |
| CN1037360C (en) * | 1994-06-18 | 1998-02-11 | 武汉钢铁(集团)公司 | Producing method for non-oriented electrical steel plate |
| CN100467623C (en) * | 2006-05-29 | 2009-03-11 | 宝山钢铁股份有限公司 | Process and device for coating-free electrical steel annealing and bluing |
| CN101876028B (en) * | 2009-12-22 | 2012-06-27 | 武汉钢铁(集团)公司 | Non-oriented electrical steel for variable frequency motor and production method thereof |
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