WO2018117598A1 - 무방향성 전기강판 및 그 제조방법 - Google Patents
무방향성 전기강판 및 그 제조방법 Download PDFInfo
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- WO2018117598A1 WO2018117598A1 PCT/KR2017/015023 KR2017015023W WO2018117598A1 WO 2018117598 A1 WO2018117598 A1 WO 2018117598A1 KR 2017015023 W KR2017015023 W KR 2017015023W WO 2018117598 A1 WO2018117598 A1 WO 2018117598A1
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
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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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/021—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving particular fabrication steps or treatments of ingots or slabs
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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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the working steps
- 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the working steps
- C21D8/1233—Cold 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the heat treatment
- C21D8/1272—Final recrystallisation annealing
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- 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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
- H01F1/14775—Fe-Si based alloys in the form of sheets
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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
- C21D2201/00—Treatment for obtaining particular effects
- C21D2201/05—Grain orientation
Definitions
- It relates to a non-oriented electrical steel sheet and a method of manufacturing the same.
- eco-friendly vehicles hybrids, full lugs-in-hybrids, electric cars, fuel cell vehicles
- motors various motors other than allergic drive motors are needed.
- driving motors should show excellent characteristics in all areas from low speed to high speed, unlike general motors. Therefore, large torque should be produced at low speed or acceleration, and the loss should be small at constant speed and high speed driving. Suitable properties are required.
- the non-oriented electrical steel sheet which is a motor core material, it has to have a large magnetic flux density characteristic at low speed rotation, low frequency high frequency loss at high speed rotation, and withstand centrifugal force generated at high speed rotation. High mechanical strength is required.
- non-oriented electrical steel sheet for environmentally friendly automobiles non-oriented electrical steel sheet including segregation elements such as Sn, Sb and P has been proposed.
- this has a problem that the cold rolling is difficult because of brittleness. Therefore, the technology of lowering the content of Sn, Sb, and P used as segregation elements to reduce the content of Si and increase the amount of ⁇ ,- ⁇ to improve the cold rolling property or to further improve the cold rolling property is proposed. It became. But, like cold rolling Focusing on productivity deteriorates magnetism and degrades motor characteristics.
- One embodiment of the present invention to provide a non-oriented electrical steel sheet containing a new additive element that can replace Sn, Sb, P.
- Another embodiment of the present invention is to provide a method for producing a non-oriented electrical steel sheet.
- Non-oriented electrical steel sheet by weight% of Si: 2.0 to 3.5%, A1: 0.3 to 2.5%, Mn: 0.3 to 2.5% and one or more of Ga and Ge, respectively, or a total thereof
- 0.0005 to 0.03% and the balance include Fe and inevitable impurities, and satisfy the following Equation 1.
- Non-oriented electrical steel sheet according to one embodiment N: 0.0040% or less (excluding OT), C: 0.0040% or less (excluding 0%), S: 0.0040% or less (excluding 0%), Ti : 0.0030% or less (excluding 0%), Nb: 0.0030% or less (excluding 0%) and V: 0.0040% or less (excluding 0%).
- the non-oriented electrical steel sheet according to one embodiment of the present invention may include Ga: 0.0005 to 0.02 weight% and Ge: 0.0005 to 0.02 weight%.
- Non-oriented electrical steel sheet according to an embodiment of the present invention may satisfy the following equation 2.
- Electrical non-oriented is the strength of the steel sheet eu "texture when tested in a l / l to about 2t / 4t zone of the steel pipe thickness ratio XRD I P200 (P211 + P310)> 0.5 may be satisfied.
- l / 2t means 1/2 thickness of the overall steel sheet thickness
- l / 4t means 1/4 thickness of the overall steel sheet thickness
- P200 means that in the XD test, the ⁇ 200> plane is 15 in the vertical direction of the steel sheet.
- P211 means the surface strength of the texture structure in which the ⁇ 211> plane lies in parallel within 15 degrees in the vertical direction of the steel sheet
- P310 is the ⁇ 310> plane It means the surface strength of the aggregate which lies in parallel within 15 degrees of this steel plate vertical direction.
- Non-oriented electrical steel sheet according to an embodiment of the present invention may have an average grain size of 50 to 95 ni.
- Non-oriented electrical steel sheet according to an embodiment of the present invention may have a specific resistance of 55 to 75 ⁇ ⁇ ⁇ .
- Nb 0.0030% or less (excluding 0%) and V: 0.0040% or less (excluding ⁇ %) may be further included.
- the slab may comprise Ga: 0.0005 to 0.02 weight% and Ge: 0.0005 to 0.02 weight%.
- the slab may satisfy the following formula 2.
- the method may further include hot-rolled sheet annealing.
- Non-oriented electrical steel sheet and manufacturing method according to an embodiment of the present invention is excellent in magnetic as well as productivity.
- first, second and third are used to describe various parts, components, regions, layers and / or sections, but are not limited to these. These terms are only used to distinguish which part, component, region, layer or section, and the other part, component, region, layer or section. Accordingly, the first portion, component, region, layer or section described below may be referred to as the second portion, component, region, layer or section without departing from the scope of the invention.
- the meaning of further including an additional element means to include a residual amount of iron (Fe) by an additional amount of the additional element.
- the composition of the non-oriented electrical steel sheet in particular, the range of the main additives S i, Al, and Mn, but also the amount of trace elements Ga and Ge are limited, thereby remarkably increasing the texture and magnetic properties. To improve.
- the non-oriented electrical steel sheet according to an embodiment of the present invention is increased in% by Si: 2.0 to 3.5%, Al: 0.3 to 2.5%, Mn: 0.3 to 2.5% and at least one of Ga and Ge. 0.0005 to 0.03%, and the balance alone or in total, include Fe and unavoidable impurities, respectively.
- Silicon (S i) serves to lower the iron loss by increasing the specific resistance of the material, if too little added, may not be effective in improving the high frequency iron loss. On the contrary too. If a large amount is added, the hardness of the material may increase, resulting in an extreme deterioration of the cold rolling property, resulting in inferior productivity and punchability. Therefore, S i can be added in the above-mentioned range. Al: 0.3-2. 5 wt%
- Aluminum (Al) serves to lower the iron loss by increasing the specific resistance of the material, if too little is added to reduce the high-frequency iron loss, and the nitride is finely formed may degrade the magnetism. Conversely, too much addition can cause problems in all processes such as steelmaking and continuous casting, which can greatly reduce productivity. Therefore, A1 can be added in the above-mentioned range.
- Manganese (Mn) increases the specific resistance of the material to improve iron loss and form sulfides. If too little is added, MnS may be finely precipitated and degrade the magnetism. On the contrary, if too much is added
- the magnetic flux density can be reduced by promoting the formation of aggregates. Therefore, Mn can be added in the above-mentioned range.
- Ga and Ge segregate on the surface and grain boundaries of the steel sheet to inhibit surface oxidation during annealing and improve the texture of the aggregates.
- one or more of Ga and Ge may be included. That is, only Ga may be included alone, only Ge may be included alone, or Ga and Ge may be included simultaneously. When only Ge is included alone, Ge may be included in 0.0005 to 0.03% by weight. When only Ga is included alone, Ga may be included in an amount of 0.0005 to 0.03% by weight. When including Ga and Ge at the same time, the total amount of Ga and Ge may be included so as to be 0.0005 to 0.03% by weight.
- Ga and Ge may be simultaneously included, and 0.0005 to 0.02 wt% of Ga and 0.0005 to 0.02 wt% of Ge may be included. More specifically, it may include 0.0005 to 0.01% by weight of Ga and 0.0005 to 0.01% by weight of Ge.
- Nitrogen (N) not only forms fine and long A 1 N precipitates inside the base material, but also combines with other impurities to form fine nitrides to inhibit grain growth.
- the iron loss is worsened, so it is preferable to limit the amount to 0.0040% by weight or less, and more specifically, 0.0030% by weight or less.
- carbon (C) causes magnetic aging and combines with other impurity elements to form carbides, thereby lowering the magnetic properties, it is preferable to limit the carbon content to 0.040% by weight or less, and more specifically, 0.0030% by weight or less.
- S Sulfur
- MnS sulfides
- the sulfur (S) is preferably controlled at 0.0040% by weight or less. More preferably, it should be limited to ⁇ .0030% by weight or less.
- Titanium (Ti) forms carbides or nitrides to inhibit grain growth and magnetic migration, so it is 0.0030% by weight or less, more specifically 0.0020% by weight? It is good to restrict to the following.
- niobium (Nb) forms carbides or nitrides and serves to inhibit grain growth and magnetic migration
- the niobium (Nb) is preferably limited to 0.0030% by weight or less, more specifically 0.0020% by weight or less.
- V 0.0030 wt% or less
- the bar (V) forms carbides or nitrides and serves to inhibit grain growth and migration, it is preferable to limit the content to 0.0030% by weight or less, more specifically, 0.0020% by weight or less.
- the steel may contain inevitable impurities such as Mo, Mg and Cu. Although these elements are trace amounts, they may cause magnetic deterioration through the formation of inclusions in the steel, etc., and therefore they should be controlled at 0.005 wt% or less and Cu: 0.025 wt% or less.
- Non-oriented electrical steel sheet according to an embodiment of the present invention satisfies the following equation 1. [Equation 1]
- Equation 1 When the value of Equation 1 is less than 0.2, the effect of adding Ga and Ge is insignificant, and the magnetism may be deteriorated. When the value of Equation 1 exceeds 5.27, the large amount of Ga and Ge is inferior to the texture, the saturation magnetic flux density is reduced, the high frequency magnetic improvement effect can be lost.
- Non-oriented electrical steel sheet according to an embodiment of the present invention may satisfy the following equation 2.
- the texture is improved by adding a specific amount of Ga and Ge. More specifically, when the XRD test of the l / 2t to l / 4t region of the steel sheet thickness, the strength ratio of the texture may satisfy P200 I (P211 + P310)> 0.5. In this case, l / 2t is the whole .
- 1 / 2t means the thickness of the steel sheet
- l / 4t means 1/4 thickness of the total steel sheet thickness
- P200 in the XRD test the ⁇ 200> plane is placed parallel to within 15 degrees in the vertical direction of the steel sheet It means the surface strength of the texture
- P211 means the surface strength of the texture in which the ⁇ 211> plane lies parallel to within 15 degrees in the vertical direction of the steel sheet
- P310 is 15 degrees in the vertical direction of the steel sheet ⁇ 310> It refers to the surface strength of the aggregates that lie parallel within.
- the aggregated structure (ie, 1) // ⁇ 200>) in which the ⁇ 200> plane lies parallel to the steel plate in the vertical direction within 15 degrees includes the biaxial axis for magnetization, and the larger the ratio, the better the magnetism.
- the aggregated structure in which the ⁇ 211> plane lies parallel to the steel plate vertical direction within 15 degrees ie, ND / ⁇ 211>
- the aggregated structure where the ⁇ 310> plane lies parallel to the steel plate vertical direction within 15 degrees. is close to the hard magnetization axis, and the smaller the ratio, the better the magnetism.
- the improvement of the magnetic structure in the low magnetic field region through the improved aggregate organization which is analyzed to play a key role in improving the high frequency iron loss.
- Non-oriented electrical steel sheet according to an embodiment of the present invention may have an average grain size of 50 to 95.
- the high frequency iron loss is excellent in the above-mentioned range.
- Non-oriented electrical steel sheet according to an embodiment of the present invention is improved in permeability and coercivity is suitable for high speed rotation. As a result, it can contribute to the improvement of mileage when applied to motors of eco-friendly cars.
- Non-oriented electrical steel sheet according to an embodiment of the present invention may have a specific resistance of 55 to 75 ⁇ ⁇ ⁇ . If the resistivity is too high, the magnetic flux density will be inferior, making the motor unsuitable.
- the reason for limiting the addition ratio of each composition in the slab is the same as the reason for limiting the composition of the non-oriented electrical steel sheet described above, and thus repeated description is omitted. Since the composition of the slab is not substantially changed in the manufacturing process of hot rolling, hot rolling annealing, cold rolling, final annealing, and the like, the composition of the slab and the composition of the non-oriented electrical steel sheet are substantially the same.
- the slab is produced by the molten steel; Adding Si alloy iron, A1 alloy iron, and Mn alloy iron to molten steel; And at least one Ga and Ge increase in molten steel, and can be produced by continuous casting.
- Si alloy iron, A1 alloy iron, Mn alloy iron, Ga, Ge and the like can be added to adjust to correspond to the composition range of the above-described slab.
- the heated slabs are hot rolled to 2 to 3.2 kPa to produce hot rolled plates.
- Finishing temperature in the step of manufacturing a hot rolled sheet may be 800 to 1000 ° C.
- the method may further include hot-rolled sheet annealing.
- the hot rolled sheet annealing temperature may be 850 to 1150 ° C. If the hot-rolled sheet annealing temperature is less than 850 ° C, the structure does not grow or finely grow, so there is little synergistic effect of the magnetic flux density. If the annealing temperature exceeds 1150 ° C, the magnetic properties deteriorate, and the rolling due to the deformation of the plate shape Workability can worsen. More specifically, the temperature range may be 950 to 1125 ° C. More specifically, the annealing temperature of the hot rolled sheet is 900 to 1100 ° C. Hot-rolled sheet annealing is performed to increase the orientation favorable to the magnetic, if necessary, may be omitted.
- the hot rolled sheet is pickled and cold rolled to a predetermined sheet thickness.
- it may be applied differently according to the thickness of the hot rolled sheet, it may be cold rolled so that the final thickness may be 0.2 to 0.65 kPa by applying a reduction ratio of 70 to 95%.
- the final cold rolled cold rolled sheet is subjected to maximum annealing so that the average grain size is 50 to 95.
- the final annealing temperature can be from 750 to 1050 ° C. 'If the final annealing silver is too low, recrystallization does not occur too much. If the final annealing temperature is too high, rapid growth of crystal grains may occur, causing magnetic flux density and high frequency iron loss to become thermal. More specifically, the temperature of 900 to loocrc Final annealing at In the final annealing process, all the processed tissue formed in the pre-rolling step can be recrystallized (ie, 99% or more).
- Permeability is the magnetic permeability at 100A / m
- the aggregates were cut into steel plates up to 1/2 t and each surface strength was determined using the XRDO (Line Diffraction Analysis) test method.
- the aggregate structure is improved, so that the permeability is large and the coercive force is small.
- the aggregate structure was not improved, so the permeability and coercivity were inferior, and grain growth was also inferior.
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Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/469,878 US11060170B2 (en) | 2016-12-19 | 2017-12-19 | Non-oriented electrical steel sheet and manufacturing method therefor |
| JP2019554463A JP6821055B2 (ja) | 2016-12-19 | 2017-12-19 | 無方向性電磁鋼板およびその製造方法 |
| EP25177101.0A EP4585708A3 (en) | 2016-12-19 | 2017-12-19 | Non-oriented electrical steel sheet and manufacturing method therefor |
| CN201780078601.6A CN110088319B (zh) | 2016-12-19 | 2017-12-19 | 无取向电工钢板及其制造方法 |
| EP17884042.7A EP3556878B1 (en) | 2016-12-19 | 2017-12-19 | Non-oriented electrical steel sheet and method for manufacturing a non-oriented electrical steel sheet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2016-0173566 | 2016-12-19 | ||
| KR1020160173566A KR101902438B1 (ko) | 2016-12-19 | 2016-12-19 | 무방향성 전기강판 및 그 제조방법 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018117598A1 true WO2018117598A1 (ko) | 2018-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2017/015023 Ceased WO2018117598A1 (ko) | 2016-12-19 | 2017-12-19 | 무방향성 전기강판 및 그 제조방법 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11060170B2 (ko) |
| EP (2) | EP4585708A3 (ko) |
| JP (1) | JP6821055B2 (ko) |
| KR (1) | KR101902438B1 (ko) |
| CN (1) | CN110088319B (ko) |
| WO (1) | WO2018117598A1 (ko) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210062287A1 (en) * | 2017-12-26 | 2021-03-04 | Posco | Non-oriented electrical steel sheet and method for preparing same |
| EP3889290A4 (en) * | 2018-11-30 | 2021-10-06 | Posco | NON-ORIENTED ELECTRIC STEEL SHEET AND METHOD OF MANUFACTURING THEREOF |
| EP3889289A4 (en) * | 2018-11-30 | 2021-10-06 | Posco | NON-ORIENTED ELECTRIC STEEL SHEET AND ITS PRODUCTION PROCESS |
| JP2023507592A (ja) * | 2019-12-19 | 2023-02-24 | ポスコホールディングス インコーポレーティッド | 無方向性電磁鋼板およびその製造方法 |
| EP4079889A4 (en) * | 2019-12-20 | 2023-05-24 | Posco | NON-ORIENTED ELECTRICAL STEEL AND METHOD OF PRODUCTION THEREOF |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102043289B1 (ko) | 2017-12-26 | 2019-11-12 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
| KR102009393B1 (ko) | 2017-12-26 | 2019-08-09 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
| KR102361872B1 (ko) * | 2019-12-19 | 2022-02-10 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
| KR102278897B1 (ko) * | 2019-12-19 | 2021-07-16 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
| KR20260000767A (ko) | 2024-06-26 | 2026-01-05 | 현대제철 주식회사 | 무방향성 전기강판 및 무방향성 전기강판 제조 방법 |
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| US20210062287A1 (en) * | 2017-12-26 | 2021-03-04 | Posco | Non-oriented electrical steel sheet and method for preparing same |
| US11634786B2 (en) * | 2017-12-26 | 2023-04-25 | Posco Co., Ltd | Non-oriented electrical steel sheet and method for preparing same |
| EP3889290A4 (en) * | 2018-11-30 | 2021-10-06 | Posco | NON-ORIENTED ELECTRIC STEEL SHEET AND METHOD OF MANUFACTURING THEREOF |
| EP3889289A4 (en) * | 2018-11-30 | 2021-10-06 | Posco | NON-ORIENTED ELECTRIC STEEL SHEET AND ITS PRODUCTION PROCESS |
| US12215400B2 (en) | 2018-11-30 | 2025-02-04 | Posco Co., Ltd | Non-directional electrical steel sheet and method for producing same |
| US12454732B2 (en) | 2018-11-30 | 2025-10-28 | Posco Co., Ltd | Non-directional electrical steel sheet and method for producing same |
| JP2023507592A (ja) * | 2019-12-19 | 2023-02-24 | ポスコホールディングス インコーポレーティッド | 無方向性電磁鋼板およびその製造方法 |
| JP7465354B2 (ja) | 2019-12-19 | 2024-04-10 | ポスコホールディングス インコーポレーティッド | 無方向性電磁鋼板およびその製造方法 |
| EP4079889A4 (en) * | 2019-12-20 | 2023-05-24 | Posco | NON-ORIENTED ELECTRICAL STEEL AND METHOD OF PRODUCTION THEREOF |
| US12215403B2 (en) | 2019-12-20 | 2025-02-04 | Posco | Non-oriented electrical steel sheet and method for manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3556878A1 (en) | 2019-10-23 |
| CN110088319B (zh) | 2021-10-08 |
| EP3556878C0 (en) | 2025-08-06 |
| US11060170B2 (en) | 2021-07-13 |
| CN110088319A (zh) | 2019-08-02 |
| EP3556878A4 (en) | 2019-11-20 |
| EP4585708A3 (en) | 2025-09-24 |
| US20200080175A1 (en) | 2020-03-12 |
| JP2020504787A (ja) | 2020-02-13 |
| KR20180070949A (ko) | 2018-06-27 |
| EP3556878B1 (en) | 2025-08-06 |
| JP6821055B2 (ja) | 2021-01-27 |
| EP4585708A2 (en) | 2025-07-16 |
| KR101902438B1 (ko) | 2018-09-28 |
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