WO2022173159A1 - 무방향성 전기강판의 제조방법 및 이에 의해 제조된 무방향성 전기강판 - Google Patents
무방향성 전기강판의 제조방법 및 이에 의해 제조된 무방향성 전기강판 Download PDFInfo
- Publication number
- WO2022173159A1 WO2022173159A1 PCT/KR2022/001604 KR2022001604W WO2022173159A1 WO 2022173159 A1 WO2022173159 A1 WO 2022173159A1 KR 2022001604 W KR2022001604 W KR 2022001604W WO 2022173159 A1 WO2022173159 A1 WO 2022173159A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steel sheet
- oriented electrical
- electrical steel
- less
- present
- Prior art date
Links
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000005336 cracking Methods 0.000 claims abstract description 24
- 238000005098 hot rolling Methods 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000000137 annealing Methods 0.000 claims abstract description 13
- 238000005097 cold rolling Methods 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 238000003303 reheating Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 6
- 238000005554 pickling Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 36
- 229910052748 manganese Inorganic materials 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 abstract description 11
- 238000009413 insulation Methods 0.000 abstract description 11
- 230000006866 deterioration Effects 0.000 abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 60
- 229910052742 iron Inorganic materials 0.000 description 24
- 239000011572 manganese Substances 0.000 description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 18
- 229910000976 Electrical steel Inorganic materials 0.000 description 16
- 239000010949 copper Substances 0.000 description 14
- 239000011651 chromium Substances 0.000 description 11
- 230000001965 increasing effect Effects 0.000 description 11
- 238000001953 recrystallisation Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000004907 flux Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 230000035882 stress Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D8/1233—Cold rolling
-
- 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
- C21D8/1261—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 following hot rolling
-
- 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
- C21D8/1272—Final recrystallisation annealing
-
- 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
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
-
- 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
-
- 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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- 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
- H01F1/14783—Fe-Si based alloys in the form of sheets with insulating coating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
Definitions
- the present invention relates to a method for manufacturing a non-oriented electrical steel sheet and to a non-oriented electrical steel sheet manufactured thereby.
- Electrical steel sheet can be divided into grain-oriented electrical steel sheet and non-oriented electrical steel sheet according to magnetic properties.
- An oriented electrical steel sheet is manufactured to be easily magnetized in the rolling direction of the steel sheet and has particularly excellent magnetic properties in the rolling direction. .
- a non-oriented electrical steel sheet has uniform magnetic properties regardless of the direction of the steel sheet. Accordingly, the non-oriented electrical steel sheet is mainly used as an iron core for a linear compressor motor, an air conditioner compressor motor, and a high-speed motor for a vacuum cleaner.
- An object of the present invention is to provide a non-oriented electrical steel sheet in which the magnetic properties of the electrical steel sheet are improved by improving the final heat treatment process after processing from the electrical steel sheet into a motor component, and a method for manufacturing the same.
- the present invention is to provide a non-oriented electrical steel sheet capable of reducing the iron loss while reducing the cost in the process by shortening the final heat treatment time, and a method for manufacturing the same.
- the non-oriented electrical steel sheet and its manufacturing method according to the present invention include a final heat treatment step of raising temperature, cracking and cooling after processing into motor parts, and maintaining for 1 to 30 minutes at a temperature of 850° C. or more during the cracking process
- a final heat treatment step of raising temperature, cracking and cooling after processing into motor parts, and maintaining for 1 to 30 minutes at a temperature of 850° C. or more during the cracking process
- the temperature raising process the temperature is raised by heating at 300°C to 600°C per hour for 1.4 hours to 3.2 hours, and the cooling process is cooled to room temperature (about 24°C) at a cooling rate of 100°C per hour.
- the non-oriented electrical steel sheet and its manufacturing method according to the present invention are C: 0.05 wt% or less, Si: 1.0 to 3.5 wt%, Al: 0.2 to 0.6 wt%, Mn: 0.02 to 0.20 wt%, P: 0.01 ⁇ 0.20% by weight, S: 0.01% by weight or less and the remaining Fe and unavoidable impurities.
- the manufacturing method according to the present invention can suppress deterioration of the insulating coating layer.
- the non-oriented electrical steel sheet and the method for manufacturing the same according to the present invention can exhibit improved magnetic properties such as low iron loss while maintaining good adhesion between the insulating coating layer and the surface of the electrical steel sheet.
- non-oriented electrical steel sheet and the method for manufacturing the same according to the present invention can reduce the iron loss while reducing the cost in the process by shortening the final heat treatment time.
- non-oriented electrical steel sheet and the method for manufacturing the same according to the present invention are suitable for use as an iron core of a linear compressor motor, an air conditioner compressor motor, and a high-speed motor for a vacuum cleaner by securing excellent magnetic properties.
- FIG. 1 is a graph showing a final heat treatment pattern according to an embodiment of the present invention.
- the non-oriented electrical steel sheet proceeds in the order of a hot rolling step, a hot rolling annealing heat treatment step, and a cold rolling step.
- the manufactured non-oriented electrical steel sheet is subjected to insulation coating and processing to be used as motor parts (stator, rotor).
- a processing process increases the mechanical and thermal stress on the cut end face of the material, thereby deteriorating the intrinsic magnetic properties of the electrical steel sheet.
- the magnetic domain magnetization polarity direction is magnetized in one direction in the machined cut part to have a local polarity.
- a final heat treatment is performed.
- the present invention reduces the cost through constant heat treatment and process optimization in the non-oriented electrical steel sheet and improves magnetic properties, thereby making it possible to produce a non-oriented electrical steel sheet that can be efficiently used as a motor component in comparison with the process cost, and through this High efficiency of the motor can be realized.
- the present invention it is possible to suppress the deterioration of the insulation coating layer while improving the magnetic properties by performing final heat treatment at high temperature after processing from the electrical steel sheet to the motor parts.
- the non-oriented electrical steel sheet according to an embodiment of the present invention is C: 0.05 wt% or less, Si: 1.0 to 3.5 wt%, Al: 0.2 to 0.6 wt%, Mn: 0.02 to 0.20 wt%, P: 0.01 to 0.20% by weight, S: 0.01% by weight or less, and the remaining Fe and unavoidable impurities.
- non-oriented electrical steel sheet according to an embodiment of the present invention may further include one or more of Cu: 0.03 wt% or less, Ni: 0.03 wt% or less, and Cr: 0.05 wt% or less.
- the non-oriented electrical steel sheet according to an embodiment of the present invention preferably has a thickness of 0.05 to 0.50 mm. If the thickness of the non-oriented electrical steel sheet is less than 0.05 mm, it is not preferable because it may cause shape defects when used as an iron core for linear compressors, air conditioner compressors, and high-speed motors for vacuum cleaners. Conversely, when the thickness of the non-oriented electrical steel sheet exceeds 0.50 mm, it is not preferable because a large amount of texture cannot be secured and the magnetic flux density is deteriorated.
- the non-oriented electrical steel sheet according to the present invention may have a low iron loss value of about 2% to about 5% under both W10/400 and W15/50 measurement conditions.
- the non-oriented electrical steel sheet according to an embodiment of the present invention has a tensile strength of 350 to 540N/mm 2 and a hardness of 200 to 270Hv.
- Silicon (Si) is added to increase the resistivity to lower the eddy current loss during iron loss.
- Silicon (Si) is preferably added in a content ratio of 1.0 to 3.5% by weight of the total weight of the non-oriented electrical steel sheet according to an embodiment of the present invention, and 2.5 to 3.2% by weight may be presented as a more preferable range.
- the amount of silicon (Si) is added in a small amount less than 1.0 wt%, it is difficult to obtain low iron loss characteristics and to improve the magnetic permeability in the rolling direction.
- the amount of silicon (Si) added exceeds 3.5 wt%, it causes a decrease in magnetic flux density, which reduces the torque of the motor or increases copper loss. have.
- Aluminum (Al) together with silicon (Si) contributes to lowering the iron loss of the non-oriented electrical steel sheet.
- Aluminum (Al) is preferably added in a content ratio of 0.2 to 0.6% by weight of the total weight of the non-oriented electrical steel sheet according to an embodiment of the present invention, and 0.3 to 0.5% by weight may be presented as a more preferable range.
- the addition amount of aluminum (Al) is less than 0.2 wt%, it is difficult to sufficiently exhibit the effect of the addition.
- the amount of aluminum (Al) is excessively added in excess of 0.6 wt %, magnetic flux density is lowered, and thus the torque of the motor is lowered or copper loss is increased.
- Manganese (Mn) serves to prevent cracks generated at both ends of the material during hot rolling.
- Manganese (Mn) is preferably added in a content ratio of 0.02 to 0.20% by weight of the total weight of the non-oriented electrical steel sheet according to an embodiment of the present invention.
- the addition amount of manganese (Mn) is less than 0.02% by weight, the risk of defects due to cracks during hot rolling increases. Conversely, when the addition amount of manganese (Mn) exceeds 0.20 wt %, the roll load increases and cold rolling property deteriorates, which is not preferable.
- Phosphorus (P) serves to increase the specific resistance and lower the iron loss.
- Phosphorus (P) is preferably added in a content ratio of 0.01 to 0.20% by weight of the total weight of the non-oriented electrical steel sheet according to an embodiment of the present invention.
- the amount of phosphorus (P) added is less than 0.01 wt %, there is a problem in that the crystal grains are excessively increased and the magnetic deviation increases.
- the amount of phosphorus (P) is excessively added in excess of 0.20 wt%, it is not preferable because cold rolling properties may be deteriorated.
- S Sulfur
- MnS manganese
- S is preferably controlled to 0.01% by weight or less of the total weight of the non-oriented electrical steel sheet according to the embodiment of the present invention.
- Copper (Cu) is added because it improves texture, suppresses fine CuS precipitation, and resists oxidation and corrosion. However, when the amount of copper (Cu) is added in excess of 0.03 wt%, it is not preferable because it may cause uniformity on the surface of the steel sheet. Therefore, copper (Cu) is preferably controlled to a content ratio of 0.03% by weight or less of the total weight of the non-oriented electrical steel sheet according to the embodiment of the present invention.
- Nickel (Ni) improves texture, and is added because it suppresses the precipitation of S as fine CuS and resists oxidation or corrosion by adding it together with Cu.
- nickel (Ni) added exceeds 0.03 wt %, the effect of improving the texture is insignificant despite the large amount of nickel (Ni) added, which is not preferable because it is uneconomical. Therefore, nickel (Ni) is preferably controlled to a content ratio of 0.03% by weight or less of the total weight of the non-oriented electrical steel sheet according to the embodiment of the present invention.
- Chromium (Cr) improves the iron loss by increasing the specific resistance, but does not increase the strength of the material.
- Cr chromium
- chromium (Cr) is preferably strictly controlled to a content ratio of 0.05 wt% or less of the total weight of the non-oriented electrical steel sheet according to the embodiment of the present invention.
- One embodiment of the present invention is a manufacturing method comprising a hot rolling step (S110), a hot rolling annealing heat treatment step (S120), a cold rolling step (S130), an insulating coating and processing step (S140) and a final heat treatment step (S150) provides Specifically, (a) C: 0.05 wt% or less, Si: 1.0 to 3.5 wt%, Al: 0.2 to 0.6 wt%, Mn: 0.02 to 0.20 wt%, P: 0.01 to 0.20 wt%, S: 0.01 wt% After reheating the steel slab containing the following and the remaining Fe and unavoidable impurities, hot rolling; (b) heat-treating the hot-rolled steel sheet by hot-rolling annealing and pickling; (c) cold rolling the pickled steel sheet; (d) processing the cold-rolled steel sheet after insulating coating; and (e) heating, cracking, and cooling the processed steel sheet to perform final heat treatment; and, wherein the cracking process is
- hot rolling step (S110) C: 0.05 wt% or less, Si: 1.0 to 3.5 wt%, Al: 0.2 to 0.6 wt%, Mn: 0.02 to 0.20 wt%, P: 0.01 to 0.20 wt%, S: 0.01 wt% After reheating the steel slab containing less than % and remaining Fe and unavoidable impurities, hot rolling is performed.
- the steel slab may further include one or more of Cu: 0.03 wt% or less, Ni: 0.03 wt% or less, and Cr: 0.05 wt% or less.
- the reheating temperature of the steel slab in order to facilitate hot rolling in the process of reheating by charging the steel slab having the above composition into the heating furnace, it is preferable to carry out the reheating temperature of the steel slab to 1,050 °C or more.
- the reheating temperature of the steel slab is preferably carried out at 1,050 ° C. to 1,250 ° C. for 1 to 3 hours.
- the finishing hot rolling temperature is performed under the conditions of 800°C to 950°C in order to prevent excessive occurrence of an oxide layer on the hot-rolled steel sheet.
- the hot-rolled steel sheet is wound at a temperature of 650° C. to 800° C. so that the oxide layer is not excessively generated and grain growth is not inhibited, and then it can be cooled in a coil state in air.
- the hot rolled steel sheet is subjected to hot rolling annealing heat treatment and pickling.
- This hot-rolled annealing heat treatment is performed for the purpose of recrystallizing the drawn grains in the center of the hot-rolled steel sheet and inducing uniform grain distribution in the thickness direction of the steel sheet.
- the hot rolling annealing heat treatment is preferably performed under the conditions of 850°C to 1,000°C.
- the hot-rolling annealing heat treatment temperature is less than 850°C, a uniform grain distribution may not be obtained, and thus the effect of improving magnetic flux density and iron loss may be insufficient.
- the hot-rolled annealing heat treatment temperature exceeds 1,000° C., the texture unfavorable to magnetism increases and the magnetic flux density deteriorates.
- the pickled steel sheet is cold rolled at a reduction ratio of 55% or less.
- cold rolling is final rolled to a thickness of 0.05 ⁇ 0.50mm. If the thickness of the cold-rolled steel sheet is less than 0.05 mm, it is not preferable because it may cause shape defects when used as an iron core for linear compressors, air conditioner compressors, and high-speed motors for vacuum cleaners. Conversely, when the thickness of the cold-rolled steel sheet exceeds 0.50 mm, it is not preferable because a large amount of texture cannot be secured and the magnetic flux density is deteriorated.
- the cold rolling is preferably performed at a reduction ratio of 55% or less, more preferably 45-50%. If the reduction ratio of cold rolling exceeds 55%, the texture is strongly developed, there is a problem in that the fraction of the texture excellent in magnetic properties is reduced.
- the reduction ratio in the cold rolling process it is preferable to strictly control the reduction ratio in the cold rolling process to a reduction ratio of 55% or less in order to suppress the generation of the texture and improve the generation of the texture to improve the magnetic properties.
- the manufacturing method may further include a recrystallization heat treatment step of recrystallization heat treatment of the cold-rolled steel sheet at a temperature condition of 700 °C ⁇ 900 °C.
- This recrystallization heat treatment is more preferably carried out at 750 ° C. to 850 ° C. for 1 to 60 minutes.
- Including recrystallization heat treatment it can have mechanical strength that can be processed without strain on the mold during insulation coating and processing after cold rolling. When one crystal grain is heat-treated at a high temperature in the future, it is possible to increase the possibility of growth in a certain direction.
- the recrystallization heat treatment temperature is less than 750° C. or the recrystallization heat treatment time is less than 1 minute, it is difficult to secure mechanical strength, so it may be impossible to process in the mold during insulation coating and machining. Conversely, when the recrystallization heat treatment temperature exceeds 850 ° C or the recrystallization heat treatment time exceeds 60 minutes, the recrystallization rate exceeds 50 vol% due to excessive heat treatment, and the mechanical strength becomes higher than necessary due to excessive heat treatment. It may put pressure on the mold.
- the cold-rolled or recrystallized heat-treated steel sheet is insulation-coated and then processed.
- the insulating coating is treated with organic, inorganic and organic-inorganic composite coatings or coated with other insulating coating agents.
- the processing may be performed in a mold in order to manufacture parts for a specific type of motor, but is not limited thereto.
- FIG. 1 is a graph showing a final heat treatment pattern according to an embodiment of the present invention.
- the processed steel sheet is subjected to final heat treatment by heating (A), cracking (B) and cooling (C).
- the local polarity formed on the cut surface by processing can be removed by final heat treatment, and the magnetic properties of the electrical steel sheet can be improved by reducing the mechanical stress.
- the temperature increase process may be increased to 300° C. to 600° C. per hour, for 1.4 to 3.2 hours, and heated to increase the temperature.
- stress relief may be insufficient, and if it exceeds the above range, damage to the insulating coating layer or the like may be applied.
- an atmosphere of 90 to 100% Ar may be used as the heat treatment atmosphere.
- the heat treatment in the cracking process is performed by maintaining the heat treatment at a temperature of 850° C. or higher for 1 to 30 minutes.
- the cracking process of the present invention may be heat-treated at a temperature of 850 °C to 950 °C. As the cracking process is performed at such a high temperature, it is possible to alleviate and restore the deterioration of the magnetic properties due to the increase in mechanical and thermal stress due to processing such as cutting.
- the insulation coating layer may be destroyed during heat treatment at high temperature, and thus there is a risk of eddy current loss.
- the loss of eddy current is increased, the efficiency of the motor is decreased. Accordingly, it was only possible to carry out the cracking process at a temperature of 800 °C or less. Accordingly, there was a problem in that the degree of relaxation of the decrease in magnetic properties due to the decrease in mechanical stress was insufficient.
- the heat treatment time can be significantly reduced.
- the cracking process may be maintained for 1 to 30 minutes. Accordingly, the process time required for the heat treatment can be reduced, which can be more economical.
- the cracking process may be heat-treated in an atmosphere of 90 to 100% Ar.
- the cooling process may be performed by reducing the temperature to room temperature at a cooling rate of 100° C. per hour.
- cooling water cooling or natural air cooling may be adopted.
- the final heat treatment process can improve the magnetic properties of the electrical steel sheet by controlling the temperature and atmospheric conditions to reduce mechanical stress. Accordingly, low iron loss can be exhibited.
- the manufacturing method according to the present invention can suppress deterioration of the insulating coating layer. Accordingly, it is possible to maintain the adhesion to the electrical steel sheet.
- each furnace is configured in a continuous line or a rotary type, or in one furnace, it is possible to use a station that undergoes several steps with different heat treatment conditions for each section. have.
- the non-oriented electrical steel sheet according to an embodiment of the present invention manufactured by the above manufacturing method is processed into a motor component, and then subjected to a cracking process at a high temperature of 850° C. or higher, thereby increasing the strength of the electrical steel sheet. characteristics have been improved.
- Another embodiment of the present invention provides a non-oriented electrical steel sheet manufactured by the above manufacturing method.
- the non-oriented electrical steel sheet is C: 0.05 wt% or less, Si: 1.0 to 3.5 wt%, Al: 0.2 to 0.6 wt%, Mn: 0.02 to 0.20 wt%, P: 0.01 to 0.20 wt%, S: 0.01% by weight or less and the remainder Fe and unavoidable impurities.
- the non-oriented electrical steel sheet may have a low iron loss value of about 2% to about 5% under both W10/400 and W15/50 measurement conditions.
- the non-oriented electrical steel sheet according to an embodiment of the present invention has a tensile strength of 350 to 540N/mm 2 and a hardness of 200 to 270Hv. And, it has a magnetic flux density (B50) of 1.65 to 1.80 T.
- non-oriented electrical steel sheet and the method for manufacturing the same secure excellent magnetic properties by improving the texture with excellent magnetic properties, and thus a linear compressor motor, an air conditioner compressor motor, and a high-speed motor for a vacuum cleaner It is suitable for use as an iron core such as
- Example 1 Specimens according to Example 1 and Comparative Example 1 were prepared with the composition of Preparation Example 1 shown in Table 1, and the final thermal process conditions shown in Table 2. Comparative Example 2 was not subjected to final heat treatment.
- Example 1 600°C/h 1.55 hours 950°C 10 minutes 100°C/h Ar 0.20 Comparative Example 1 600°C/h 1.55 hours 770°C 2 hours 100°C/h Ar 0.20 Comparative Example 2 - - - - 0.20
- Table 3 shows the iron loss measurement results for the specimens according to Example 1 and Comparative Examples 1 and 2.
- the iron loss W15/50 is the amount of energy lost due to heat or the like when a magnetic flux density of 1.5 Tesla is induced in the iron core at an alternating current of 50 Hz.
Abstract
Description
구분 | C | Si | Al | Mn | P | Cu (ppm) |
Ni (ppm) |
Cr (ppm) |
S (ppm) |
Fe |
제조예 1 | 0.020 | 3.01 | 0.41 | 0.13 | 0.14 | 106 | 77 | 41 | 43 | Bal. |
구분 | 승온 승온속도/시간 |
균열 유지온도/시간 |
냉각 하온속도 (상온(24℃)까지) |
분위기 | 최종 강판 두께 (mm) |
실시예 1 | 600℃/h 1.55시간 |
950℃ 10분 |
100℃/h |
Ar | 0.20 |
비교예 1 | 600℃/h 1.55시간 |
770℃ 2시간 |
100℃/h |
Ar | 0.20 |
비교예2 | - | - | - | - | 0.20 |
구분 | 철손(W/Kg) | |
W10/400 | W15/50 | |
실시예 1 | 14.69 | 1.93 |
비교예 1 | 15.12 | 2.02 |
비교예 2 | 18.74 | 2.26 |
Claims (8)
- (a) C : 0.05 중량% 이하, Si : 1.0 ~ 3.5 중량%, Al : 0.2 ~ 0.6 중량%, Mn : 0.02 ~ 0.20 중량%, P : 0.01 ~ 0.20 중량%, S : 0.01 중량% 이하 및 나머지 Fe와 불가피한 불순물을 포함하는 강 슬라브를 재가열한 후, 열간압연하는 단계;(b) 상기 열간압연된 강판을 열연 소둔 열처리하고, 산세하는 단계;(c) 상기 산세된 강판을 냉간압연하는 단계;(d) 상기 냉간압연된 강판을 절연코팅한 후, 가공 처리하는 단계; 및(e) 상기 가공 처리된 강판을 승온, 균열 및 냉각하여 최종 열처리하는 단계;를 포함하고,상기 균열과정은 850℃ 이상의 온도에서, 1 내지 30 분 동안 유지하여 행하는무방향성 전기강판 제조 방법.
- 제1항에 있어서,상기 균열과정은 850℃ 내지 950℃ 에서 행하는무방향성 전기강판 제조 방법.
- 제1항에 있어서,상기 균열과정은 Ar 분위기에서 행하는무방향성 전기강판 제조 방법.
- 제1항에 있어서,상기 승온과정은 시간당 300℃ 내지 600℃ 로, 1.4 내지 3.2 시간 동안 가열하여 승온하는무방향성 전기강판 제조 방법.
- 제1항에 있어서,상기 냉각과정은 시간당 100℃의 냉각 속도로, 상온까지 냉각하는무방향성 전기강판 제조 방법.
- 제1항에 있어서,상기 (a) 단계에서,상기 강 슬라브는Cu : 0.03 중량% 이하, Ni : 0.03 중량% 이하 및 Cr : 0.05 중량% 이하 중 1종 이상을 더 포함하는무방향성 전기강판 제조 방법.
- 제1항에 있어서,상기 (c) 단계 이후,상기 전기강판은0.05 내지 0.50mm의 두께를 갖는무방향성 전기강판 제조 방법.
- 제1항 내지 제7항 중 어느 한 항의 제조방법에 의해 제조된무방향성 전기강판.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22752919.5A EP4293130A1 (en) | 2021-02-10 | 2022-01-28 | Method for manufacturing non-oriented electrical steel sheet, and non-oriented electrical steel sheet manufactured thereby |
CN202280013707.9A CN116888285A (zh) | 2021-02-10 | 2022-01-28 | 无取向电钢板的制造方法以及由此制造的无取向电钢板 |
US18/276,733 US20240102123A1 (en) | 2021-02-10 | 2022-01-28 | Method for manufacturing non-oriented electrical steel sheet, and non-oriented electrical steel sheet manufactured thereby |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020210019153A KR102515028B1 (ko) | 2021-02-10 | 2021-02-10 | 무방향성 전기강판의 제조방법 및 이에 의해 제조된 무방향성 전기강판 |
KR10-2021-0019153 | 2021-02-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022173159A1 true WO2022173159A1 (ko) | 2022-08-18 |
Family
ID=82837671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2022/001604 WO2022173159A1 (ko) | 2021-02-10 | 2022-01-28 | 무방향성 전기강판의 제조방법 및 이에 의해 제조된 무방향성 전기강판 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240102123A1 (ko) |
EP (1) | EP4293130A1 (ko) |
KR (1) | KR102515028B1 (ko) |
CN (1) | CN116888285A (ko) |
WO (1) | WO2022173159A1 (ko) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040055906A (ko) * | 2002-12-23 | 2004-06-30 | 주식회사 포스코 | 철손이 낮은 무방향성 전기강판의 제조방법 |
KR100721863B1 (ko) | 2005-12-21 | 2007-05-28 | 주식회사 포스코 | 영구자석형 모터의 고정자 철심 열처리방법 |
KR20150093807A (ko) * | 2013-02-21 | 2015-08-18 | 제이에프이 스틸 가부시키가이샤 | 자기 특성이 우수한 세미프로세스 무방향성 전기 강판의 제조 방법 |
KR20180087374A (ko) * | 2015-12-28 | 2018-08-01 | 제이에프이 스틸 가부시키가이샤 | 무방향성 전기 강판, 및 무방향성 전기 강판의 제조 방법 |
KR20200035759A (ko) * | 2018-09-27 | 2020-04-06 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
JP6825758B1 (ja) * | 2019-07-11 | 2021-02-03 | Jfeスチール株式会社 | 無方向性電磁鋼板とその製造方法およびモータコア |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR950004934B1 (ko) * | 1992-10-09 | 1995-05-16 | 포항종합제철주식회사 | 투자율이 우수한 무방향성 전기 강판 및 그 제조방법 |
JP2017040002A (ja) * | 2015-08-21 | 2017-02-23 | 日本金属株式会社 | 高周波用無方向性電磁鋼板およびその製造方法 |
-
2021
- 2021-02-10 KR KR1020210019153A patent/KR102515028B1/ko active IP Right Grant
-
2022
- 2022-01-28 US US18/276,733 patent/US20240102123A1/en active Pending
- 2022-01-28 EP EP22752919.5A patent/EP4293130A1/en active Pending
- 2022-01-28 CN CN202280013707.9A patent/CN116888285A/zh active Pending
- 2022-01-28 WO PCT/KR2022/001604 patent/WO2022173159A1/ko active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040055906A (ko) * | 2002-12-23 | 2004-06-30 | 주식회사 포스코 | 철손이 낮은 무방향성 전기강판의 제조방법 |
KR100721863B1 (ko) | 2005-12-21 | 2007-05-28 | 주식회사 포스코 | 영구자석형 모터의 고정자 철심 열처리방법 |
KR20150093807A (ko) * | 2013-02-21 | 2015-08-18 | 제이에프이 스틸 가부시키가이샤 | 자기 특성이 우수한 세미프로세스 무방향성 전기 강판의 제조 방법 |
KR20180087374A (ko) * | 2015-12-28 | 2018-08-01 | 제이에프이 스틸 가부시키가이샤 | 무방향성 전기 강판, 및 무방향성 전기 강판의 제조 방법 |
KR20200035759A (ko) * | 2018-09-27 | 2020-04-06 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
JP6825758B1 (ja) * | 2019-07-11 | 2021-02-03 | Jfeスチール株式会社 | 無方向性電磁鋼板とその製造方法およびモータコア |
Also Published As
Publication number | Publication date |
---|---|
CN116888285A (zh) | 2023-10-13 |
US20240102123A1 (en) | 2024-03-28 |
KR20220115308A (ko) | 2022-08-17 |
KR102515028B1 (ko) | 2023-03-27 |
EP4293130A1 (en) | 2023-12-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021125855A2 (ko) | 무방향성 전기강판 및 그 제조방법 | |
WO2021125682A2 (ko) | 무방향성 전기강판 및 그 제조방법 | |
WO2016099191A1 (ko) | 방향성 전기강판 및 그 제조방법 | |
WO2015099217A1 (ko) | 연질 고규소 강판 및 그 제조방법 | |
WO2012087045A2 (ko) | 저철손 고강도 무방향성 전기강판 및 그 제조방법 | |
WO2013100698A1 (ko) | 무방향성 전기강판 및 그 제조방법 | |
WO2020067721A1 (ko) | 이방향성 전기강판 및 그의 제조방법 | |
WO2021125685A2 (ko) | 무방향성 전기강판 및 그 제조방법 | |
WO2021125683A2 (ko) | 무방향성 전기강판 및 그 제조방법 | |
WO2021125864A1 (ko) | 방향성 전기강판 및 그의 제조방법 | |
KR100779579B1 (ko) | 철손이 낮고 자속밀도가 높은 무방향성 전기강판의제조방법 | |
WO2022173159A1 (ko) | 무방향성 전기강판의 제조방법 및 이에 의해 제조된 무방향성 전기강판 | |
WO2022139337A1 (ko) | 무방향성 전기강판 및 그 제조방법 | |
WO2020111741A1 (ko) | 방향성 전기강판 및 그의 제조방법 | |
WO2022139314A1 (ko) | 무방향성 전기강판 및 그 제조방법 | |
WO2023121295A1 (ko) | 무방향성 전기강판, 그 제조 방법 및 그를 포함하는 모터 코어 | |
KR100516458B1 (ko) | 자성이 우수한 무방향성 전기강판 및 그 제조방법 | |
WO2023121294A1 (ko) | 무방향성 전기강판 및 그를 포함하는 모터 코어 | |
WO2021125686A1 (ko) | 방향성 전기강판 및 그의 제조방법 | |
WO2021132875A1 (ko) | 무방향성 전기강판 및 그 제조 방법 | |
WO2023121270A1 (ko) | 무방향성 전기강판 및 그 제조방법 | |
WO2022139352A1 (ko) | 방향성 전기강판 및 그의 제조방법 | |
WO2023121308A1 (ko) | 무방향성 전기강판, 그 제조방법 및 그를 포함하는 모터 코어 | |
WO2022139354A1 (ko) | 방향성 전기강판 및 그의 제조방법 | |
WO2021125857A1 (ko) | 이방향성 전기강판 및 그의 제조방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22752919 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280013707.9 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18276733 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022752919 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022752919 Country of ref document: EP Effective date: 20230911 |