CN106756491B - A kind of non-oriented electrical steel and production method of weldability and excellent magnetic - Google Patents
A kind of non-oriented electrical steel and production method of weldability and excellent magnetic Download PDFInfo
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- CN106756491B CN106756491B CN201611160400.4A CN201611160400A CN106756491B CN 106756491 B CN106756491 B CN 106756491B CN 201611160400 A CN201611160400 A CN 201611160400A CN 106756491 B CN106756491 B CN 106756491B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
- C23C8/12—Oxidising using elemental oxygen or ozone
- C23C8/14—Oxidising of ferrous surfaces
Abstract
A kind of non-oriented electrical steel of weldability and excellent magnetic, its chemical component and wt%:C :≤0.0030%, Si:0.8 ~ 1.7%, Mn:0.2 ~ 0.8%, S :≤0.0050%, P:0.01 ~ 0.15%, Al :≤0.030%, N :≤0.0050%, Sn or Sb are one such or two kinds, and total content is no more than 0.05%.Production method: through steel-making, hot rolling, pickling and it is cold-rolled to finished product thickness；Processing of turning blue is being carried out after finished products；It is sampled, batches, packs and examines.The defects of present invention improves the weldability of product while keeping interface resistance, reduces weld blowhole, is broken；The present invention passes through the atmosphere, temperature, dew point and the unit speed that turn blue to the oxidation of non-oriented electrical steel thin plate and the control for temperature of turning blue, while improving interface resistance, can also minimum reduction because surface oxidation is to magnetic deterioration, guarantee that finished product is magnetic: 0.50mm plate B50>=1.75T, P1.5/50≤5.0 W/kg。
Description
Technical field
The present invention relates to a kind of non-oriented electrical steel and production methods, particularly belong to the nothing of a kind of weldability and excellent magnetic
Oriented electrical steel and production method.
Background technique
The quality of the performance of No yield point electrician is not only embodied on every magnetism index (iron loss, magnetic strength, magnetic conductivity etc.) it
The applicability of processing performance (punching, weldability) also strong influence product.Magnetic behavior influences the service performance of motor, adds
The stability and production efficiency of work performance influence motor manufacturing.The stator core of most of motor is all that silicon steel punched chip is pressed
Or riveting is made, but also some stator cores are that welding is made.Since the non-orientation silicon steel surface of current full technique is coated with painting
Layer, some of coatings are half organic coating or organic coating.These coatings contain a large amount of carbon and protium in welding process
Middle oxidation generates gas and is easily formed stomata, serious so that weld cracking, needs multiple repair welding greatly to restrict production efficiency,
And since multiple repair welding welding heat affected zone increases, deteriorate motor performance.One of main method of weld blowhole is solved to change
The ingredient of inorganic matter is changed to magnesium bichromate by zinc dichromate and improves weldability in half organic coating, but still contains organic matter in coating
There is improvement that cannot completely eliminate weldability；Another method uses inorganic coating, however inorganic coating processing type is poor, mainly
It shows as punching and caking property is poor, can liquidate in punching lamination and be molded as excessive wear, and coating is easy to fall off shadow
Ring insulation effect.
Through retrieving, China Patent Publication No. is the document of CN103882193A, disclose the cold rolling of outer oxide a kind of without
It is orientated method for annealing.The purpose is to so that cold-rolled non-oriented electrical steel is turned blue in recirculation cooler.Its major technique is setting
Be nitrogen circulation in the cooler of continuous annealing furnace, oxygen content is 600 ~ 1000ppm, and dew point is -40 ~ 40 DEG C, and steel plate from
The plate temperature of open cycle cooler is 200 ~ 450 DEG C, while requiring the dew point of soaking pit is -60 ~ 60 DEG C.The document is mainly continuous
It is carried out in annealing furnace recirculation cooler, since non-oriented electrical steel recrystallization temperature is higher, typically larger than 750 DEG C, and cooler
It is shorter, it is cooled to that 200 ~ 450 DEG C of lower oxidizing temperatures are highly difficult to require lower plate speed can be only achieved, influences production effect
Rate.
China Patent Publication No. is the document of CN105567917A, is disclosed a kind of raw with non-orientation silicon steel anneling production line
Produce the method for moving back backboard.The document utilizes the production equipment of non-orientation silicon steel annealed wire, and production indigo plant moves back plate non-orientation silicon steel.Wherein
Steel band carries out subregion oxidation in drying oven and sintering furnace, and the furnace temperature of drying oven is at 350 ~ 460 DEG C, sintering furnace furnace temperature 280 ~ 350
DEG C, the oxidated layer thickness that control indigo plant moves back plate is 8 ~ 23 μm.The product oxide layer of this method production is thicker to non-oriented electrical steel
It is magnetic deteriorate serious, be only applicable to the production that common indigo plant moves back plate.
Summary of the invention
Of the existing technology due to containing organic matter in coating the invention reside in overcoming, this kind of product is in the welding process
The deficiency for being easy to generate bubble and influencing production efficiency and product stability, provide it is a kind of after finished products directly to steel band table
Face carries out aoxidizing processing of turning blue, and acquisition insulation effect is good, and magnetism deteriorates the non-oriented electrical steel of small and weldability and excellent magnetic
Production method.
Realize the measure of above-mentioned purpose:
A kind of non-oriented electrical steel of weldability and excellent magnetic, chemical component and weight percent content are as follows: C :≤
0.0030%, Si:0.8 ~ 1.7%, Mn:0.2 ~ 0.8%, S :≤0.0050%, P:0.01 ~ 0.15%, Al :≤0.030%, N :≤
0.0050%, Sn or Sb are one such or two kinds, and total content is no more than 0.05%, remaining is iron and inevitable impurity；At
Product are magnetic: B50>=1.75T, P1.5/50≤5.0 W/kg；50 ~ 300 Ω mm of interface resistance2/ piece.
The method for producing the non-oriented electrical steel of a kind of weldability and excellent magnetic, step:
1) through steel-making, hot rolling, pickling and it is cold-rolled to finished product thickness；
2) carrying out processing of turning blue after finished products: directly carrying out processing of turning blue, control hair after the completion of in continuous annealing
Blue atmosphere is N2With vapor H2The gaseous mixture of O, dew point are 20~75 DEG C, and temperature of turning blue is 450~700 DEG C, and plate speed is
50 ~ 100m/min, and require the ratio between in-furnace temperature and plate speed 5.0 ~ 10；
3) it is sampled, batches, packs and examines.
The effect and mechanism of each element in the present invention:
C ,≤0.0030%.C is reduced to≤0.0030% in steel-making, rear process decarburization can be removed from, while finished product does not occur
Magnetic aging；
Si, 0.8 ~ 1.7%.Si is the element for increasing resistance but reducing saturation magnetic strength (Bs).Si < 0.8%, then iron loss meeting
Increase, but Si > 1.7%, then magnetic strength (B50) reduce, to take into account iron loss and magnetic strength, Si should be controlled in 0.8 ~ 1.7% range；
Mn, 0.2 ~ 0.8%.Mn can control the illeffects of S, and increase is conducive to obtain coarse MnS.But Mn > 0.8%,
The effect has been saturated, and increases cost, and therefore, Mn is controlled 0.2 ~ 0.8%；
P, 0.01 ~ 0.15%.Resistance and hardness can be improved in P, thus in low Si(< 1.0%) in steel, advantageously reduce iron loss and
Punching shape is improved, therefore, P answers > 0.01%, but P > 0.15% will lead to the brittleness in annealing process.So control 0.01 ~
0.15%；
Al ,≤0.03%.Al can increase resistance and crystal grain is promoted to grow up, and general additional amount is 0.25 ~ 0.50% but meeting
It is formed to magnetic unfavorable AlN and internal oxidation layer, through studying, when Al≤0.03%, can substantially reduce to form AlN and internal oxidation layer
Amount also advantageously reduces cost to improve magnetism.So Al≤0.03%；
Sn and Sb, one such or a variety of, content is no more than 0.05%.Sn, Sb are Yi Yuan crystal boundary segregation member
Element is conducive to inhibit to be formed in crystal boundary to magnetic unfavorable (111) plane texture, is greater than 0.05% cost and increases, while influencing table
Face quality；
S, N ,≤0.005%.S, N is and should reduce to the greatest extent to magnetic unfavorable element, thus, 0.005% or less control.
The present invention takes and does not need coating coatings layer finished products are laggard, but directly carries out processing of turning blue, and
It is N in atmosphere2With vapor H2The gaseous mixture of O, dew point be 20~75 DEG C, temperature be 450~700 DEG C, plate speed be 50 ~
100m/min, and the ratio between in-furnace temperature and plate speed is required to turn blue under conditions of 5.0 ~ 10.
Atmosphere is adopted as N2With vapor H2The gaseous mixture of O has to guarantee that drying oven and sintering furnace are in weak oxide atmosphere
Conducive to the oxidation of non-oriented electromagnetic steel sheet；Ensure that thin plate oxidation is uniform by setting reasonable gas flow and pressure.If furnace
Then electrician's steel oxidation is severe by Wen Taigao, and magnetism deteriorates serious；The too low bad influence motor performance of then insulation effect of temperature.Dew point pair
The influence of oxidation is also bigger, and dew point too high oxidative atmosphere is strong, and thin plate oxidation is serious, and too suboxides effect is bad.
It is required that aoxidizing the ratio between the furnace temperature turned blue and plate speed is 5.0 ~ 10.The oxidation obtained if it is less than 5.0 is turned blue layer
Relatively thin not fine and close, interface resistance is low；Severe if it is greater than 10 non-oriented electrical steel thin plate oxidations, magnetism deteriorates serious.
After testing, the oxide layer obtained by this method is finer and close, and insulation effect is good, to magnetism deteriorate it is small and
Corrosion resistance and inoxidizability are relatively good.Finished product is magnetic: 0.50mm plate B50>=1.75T, P1.5/50≤5.0 W/kg；Interface resistance 50 ~
300Ω·mm2/ piece, weldability is good, bubble-free and snaps.
Compared with prior art, the present invention improving the weldability of product while keeping interface resistance, reduce weldering
The defects of connecing stomata, being broken；The present invention is by aoxidizing the atmosphere, temperature, dew point and the unit that turn blue to non-oriented electrical steel thin plate
The control of speed and temperature of turning blue, while improving interface resistance, moreover it is possible to which the reduction of minimum is because surface oxidation is to magnetism
Deterioration, guarantee that finished product is magnetic: 0.50mm plate B50>=1.75T, P1.5/50≤5.0 W/kg。
Specific embodiment
The present invention is described in detail below:
Table 1 is the chemical component list of each case study on implementation of the present invention；
Table 2 is the main technologic parameters and behavior pattern list of each case study on implementation of the present invention.
Each case study on implementation of the present invention follows the steps below production:
1) through steel-making, hot rolling, pickling and it is cold-rolled to finished product thickness；
2) carrying out processing of turning blue after finished products: directly carrying out processing of turning blue, control hair after the completion of in continuous annealing
Blue atmosphere is N2With vapor H2The gaseous mixture of O, dew point are 20~75 DEG C, and temperature of turning blue is 450~700 DEG C, and plate speed is
50 ~ 100m/min, and require the ratio between in-furnace temperature and plate speed 5.0 ~ 10；
3) it is sampled, batches, packs and examines.
The chemical component list (wt%) of 1 each case study on implementation of the present invention of table
The main technologic parameters list and the effect list of 2 each case study on implementation of the present invention of table
As can be seen from Table 2: the magnetism and insulation effect of product are preferable under the ingredient and technique for meeting this patent requirement,
Meet the medium and small and micromotor requirement to property of non-oriented electric steel, the good bubble-free of weldability and is broken defect.Comparative example 1
Non-oriented electrical steel thin plate face with 2 is coated with half organic coating, and weldability difference has stomata and is broken defect；Comparative example 3 and 4 item by
Do not reach requirement in oxidation technique of turning blue, steel plate oxidation it is serious it is magnetic deteriorate it is serious.
Present embodiment is only the best example, not to the restricted implementation of technical solution of the present invention.
Claims (1)
1. the method for producing the non-oriented electrical steel of a kind of weldability and excellent magnetic, step:
1) through steel-making, hot rolling, pickling and it is cold-rolled to finished product thickness；
2) carrying out processing of turning blue after finished products: directly carrying out processing of turning blue after the completion of in continuous annealing, control and turn blue
Atmosphere is N2With vapor H2The gaseous mixture of O, dew point be 20~75 DEG C, temperature of turning blue be 580~700 DEG C, plate speed be 50 ~
100m/min, and require the ratio between in-furnace temperature and plate speed 5.0 ~ 10；
3) it is sampled, batches, packs and examines；
The chemical component and weight percent content of the non-oriented electrical steel of a kind of weldability and excellent magnetic are as follows: C :≤
0.0030%, Si:1.02 ~ 1.7%, Mn:0.2 ~ 0.8%, S :≤0.0050%, P:0.01 ~ 0.15%, Al :≤0.030%, N :≤
0.0050%, Sn or Sb are one such or two kinds, and total content is no more than 0.05%, remaining is iron and inevitable impurity.
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| CN108286021B (en) * | 2018-03-27 | 2020-01-21 | 东北大学 | Preparation method of high-magnetic-induction non-oriented silicon steel plate |
| CN109112403B (en) * | 2018-09-10 | 2020-10-02 | 马鞍山钢铁股份有限公司 | High-permeability non-oriented silicon steel for high-voltage motor and manufacturing method thereof |
| CN109023116B (en) * | 2018-09-30 | 2021-09-07 | 日照钢铁控股集团有限公司 | Method for producing non-oriented electrical steel by adopting thin slab endless rolling |
| CN111471927B (en) * | 2020-04-27 | 2022-03-25 | 马鞍山钢铁股份有限公司 | High-magnetic-induction non-oriented silicon steel for automobile generator and preparation method thereof |
| CN113737089B (en) * | 2020-05-29 | 2022-07-15 | 宝山钢铁股份有限公司 | Low-cost and extremely-low-aluminum non-oriented electrical steel plate and manufacturing method thereof |
| CN112080699B (en) * | 2020-09-11 | 2021-10-12 | 北京科技大学 | Method for preparing high-magnetic-performance powder silicon steel sheet |
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| JP4730981B2 (en) * | 1998-02-16 | 2011-07-20 | 住友金属工業株式会社 | Non-oriented electrical steel sheet and manufacturing method thereof |
| CN102925793B (en) * | 2012-11-27 | 2014-12-10 | 武汉钢铁(集团)公司 | Non-oriented electrical steel with magnetic induction greater than or equal to 1.8 T and production method thereof |
| CN103352165B (en) * | 2013-05-28 | 2015-12-02 | 武汉钢铁(集团)公司 | Cold rolling coil tie steel and the production method thereof of tensile strength >=940MPa |
| CN106086354A (en) * | 2016-07-18 | 2016-11-09 | 华南理工大学 | A kind of production method of the coating non-oriented electrical steel 50W600 that turns blue |
| 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 |
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