WO2023063369A1 - 無方向性電磁鋼板、鉄心およびモータコア、ならびに鉄心およびモータコアの製造方法 - Google Patents
無方向性電磁鋼板、鉄心およびモータコア、ならびに鉄心およびモータコアの製造方法 Download PDFInfo
- Publication number
- WO2023063369A1 WO2023063369A1 PCT/JP2022/038106 JP2022038106W WO2023063369A1 WO 2023063369 A1 WO2023063369 A1 WO 2023063369A1 JP 2022038106 W JP2022038106 W JP 2022038106W WO 2023063369 A1 WO2023063369 A1 WO 2023063369A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- less
- steel sheet
- oriented electrical
- electrical steel
- insulating coating
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 86
- 239000010959 steel Substances 0.000 title claims abstract description 86
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 100
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000000034 method Methods 0.000 title description 16
- 238000000576 coating method Methods 0.000 claims abstract description 88
- 239000011248 coating agent Substances 0.000 claims abstract description 87
- 229910052742 iron Inorganic materials 0.000 claims abstract description 40
- 239000000126 substance Substances 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 30
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 claims description 85
- 238000000137 annealing Methods 0.000 claims description 52
- 229910052799 carbon Inorganic materials 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 33
- 238000010030 laminating Methods 0.000 claims description 16
- 229910052748 manganese Inorganic materials 0.000 claims description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims description 13
- 229910052719 titanium Inorganic materials 0.000 claims description 13
- 229910052720 vanadium Inorganic materials 0.000 claims description 13
- 229910052735 hafnium Inorganic materials 0.000 claims description 12
- 229910052758 niobium Inorganic materials 0.000 claims description 12
- 229910052715 tantalum Inorganic materials 0.000 claims description 12
- 229910052726 zirconium Inorganic materials 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- 238000003475 lamination Methods 0.000 claims description 8
- 238000004080 punching Methods 0.000 claims description 7
- 229910000976 Electrical steel Inorganic materials 0.000 claims 2
- 239000002585 base Substances 0.000 description 47
- 239000011162 core material Substances 0.000 description 34
- 150000001247 metal acetylides Chemical class 0.000 description 16
- 239000011347 resin Substances 0.000 description 12
- 229920005989 resin Polymers 0.000 description 12
- 230000006866 deterioration Effects 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 238000009413 insulation Methods 0.000 description 8
- 239000003513 alkali Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 150000003568 thioethers Chemical class 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 239000011651 chromium Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 150000002484 inorganic compounds Chemical class 0.000 description 5
- 229910010272 inorganic material Inorganic materials 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910000576 Laminated steel Inorganic materials 0.000 description 1
- -1 SiC Chemical class 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 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
-
- 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
- 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
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D8/1222—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
- 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
-
- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
- C23C22/10—Orthophosphates containing oxidants
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
- C23C22/18—Orthophosphates containing manganese cations
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
- C23C22/20—Orthophosphates containing aluminium cations
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/50—Treatment of iron or alloys based thereon
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings
-
- 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
-
- 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
- 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
- H01F1/16—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 in the form of sheets
- H01F1/18—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 in the form of sheets with insulating coating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/02—Cores, Yokes, or armatures made from sheets
-
- 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
- H01F41/02—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 for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
-
- 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
- H01F41/02—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 for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
-
- 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
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium
Definitions
- the present invention relates to non-oriented electrical steel sheets, iron cores and motor cores, and methods for manufacturing iron cores and motor cores.
- the Si content has been increased and the sulfide content has been reduced for the purpose of reducing iron loss (see Patent Document 1, etc.).
- Increasing the Si content has the effect of increasing resistivity and reducing eddy current loss.
- by reducing sulfides precipitates that inhibit movement of grain boundaries are reduced, which promotes coarsening of grains and reduces hysteresis loss.
- attempts have been made to improve magnetic properties by stress relief annealing for removing punching strain.
- the present invention has been made to solve such problems, and an object of the present invention is to stably obtain a non-oriented electrical steel sheet with low iron loss.
- the gist of the present invention is the following non-oriented electrical steel sheet, iron core, motor core, and method for manufacturing the iron core and motor core.
- a base steel plate and an insulating coating formed on the surface of the base steel plate The chemical composition of the base material steel plate is % by mass, C: 0.0030% or less, Si: 3.2 to 6.5%, Mn: 0.05-3.5%, P: 0.005 to 0.10%, S: 0.0030% or less, Al: 1.0% or less, Ti: 0.0030% or less, B: 0.0010% or less, Mo: 0.030% or less, V: 0.0010% or less, Ca: 0 to 0.0050%, Mg: 0-0.0050%, REM: 0 to 0.0050%, balance: Fe and impurities, satisfying the following formula (i), The chemical composition of the insulating coating satisfies the following formula (ii), Non-oriented electrical steel sheet.
- the chemical composition of the base material steel plate is, in mass%, instead of part of Fe, Sn: 0.10% or less, Sb: 0.10% or less, Ni: 0.10% or less, Cr: 0.10% or less, and Cu: 0.10% or less, containing one or more selected from The non-oriented electrical steel sheet according to (1) above.
- the thickness of the base steel sheet is less than 0.30 mm, and the thickness of the insulating coating is 1.0 ⁇ m or less.
- annealing is performed at 800 ° C. for 2 hours in an atmosphere of N 2 : 100% and a dew point of -30 ° C., and then the five laminated sheets
- the amount of carbide contained in the insulating coating in one non-oriented electrical steel sheet in the center of the lamination direction of the non-oriented electrical steel sheets is 10 mg / m2 or more in terms of carbon content.
- the non-oriented electrical steel sheet according to any one of (1) to (6) above.
- a motor core including a rotor core and a stator core in which a plurality of non-oriented electrical steel sheets are laminated
- the non-oriented electrical steel sheet comprises a base material steel sheet and an insulating coating formed on the surface of the base material steel sheet,
- the chemical composition of the base material steel plate is % by mass, C: 0.0030% or less, Si: 3.2 to 6.5%, Mn: 0.05-3.5%, P: 0.005 to 0.10%, S: 0.0030% or less, Al: 1.0% or less, Ti: 0.0030% or less, B: 0.0010% or less, Mo: 0.030% or less, V: 0.0010% or less, Ca: 0 to 0.0050%, Mg: 0-0.0050%, REM: 0 to 0.0050%, balance: Fe and impurities, satisfying the following formula (i), the chemical composition of the insulating coating in the non-oriented electrical steel sheet constituting the rotor core satisfies the following formula (ii), The amount of carb
- the non-oriented electrical steel sheet according to any one of (1) to (7) above is punched into a predetermined shape and laminated, and then subjected to stress relief annealing at a temperature range of 750 to 900°C. , A method of manufacturing a motor core.
- FIG. 5 is a diagram showing the relationship between an increase in C concentration and iron loss (hysteresis loss);
- the inventors of the present invention conducted further studies on a method for suppressing the deterioration of iron loss due to precipitation of carbides, and as a result, it was found that Mn, Ti, Zr, Hf, Ta, Nb, V, Mo and Zn It has been found that by including one or more selected elements, the carbon remaining or remaining in the insulating coating reacts with these elements to form carbides and is rendered harmless.
- a non-oriented electrical steel sheet according to one embodiment of the present invention includes a base material steel sheet and an insulating coating formed on the surface of the base material steel sheet.
- the chemical compositions of the base steel sheet and the insulating coating are described below.
- C 0.0030% or less
- C is an element that contributes to increasing the strength of the steel sheet but causes iron loss deterioration. If the C content exceeds 0.0030%, iron loss deterioration occurs in the non-oriented electrical steel sheet, and good magnetic properties cannot be obtained. Therefore, the C content should be 0.0030% or less.
- the C content is preferably 0.0027% or less, more preferably 0.0025% or less. Note that an excessive reduction in the C content causes an increase in manufacturing costs, so it is preferably 0.0001% or more, more preferably 0.0005% or more.
- Si 3.2-6.5%
- Si is an element that increases the electrical resistance of steel and improves iron loss.
- Si has a high solid-solution strengthening ability, it is an element effective for increasing the strength of steel sheets.
- the Si content should be 3.2 to 6.5%.
- the Si content is preferably 3.3% or more, preferably 6.0% or less, 5.5% or less, 5.0% or less, or 4.5% or less.
- Mn 0.05-3.5%
- Mn is an element that increases the electrical resistance of steel and improves iron loss.
- MnS fine sulfides
- the Mn content should be 0.05 to 3.5%.
- the Mn content is preferably 0.10% or more, or 0.20% or more, and is preferably 3.0% or less, less than 3.0%, 2.8% or less, or 2.5% or less. preferable.
- P 0.005 to 0.10%
- P is contained in steel as an impurity, and if the content is excessive, the ductility of the steel sheet may be significantly reduced.
- P is an element having a high solid-solution strengthening ability, so it is an effective element in increasing the strength of a steel sheet.
- P has the effect of suppressing the formation of carbides after stress relief annealing by competing with C and segregating at grain boundaries. Therefore, the P content should be 0.005 to 0.10%.
- the P content is preferably 0.050% or less.
- S 0.0030% or less
- S is an element that forms fine precipitates of MnS to increase iron loss and deteriorate the magnetic properties of the steel sheet. Therefore, the S content should be 0.0030% or less.
- the S content is preferably 0.0015% or less.
- the S content is preferably 0.0005% or more.
- Al 1.0% or less
- Al is an element that increases the electric resistance of steel and improves iron loss. However, if the Al content is excessive, the magnetic flux density may decrease. Therefore, the Al content is set to 1.0% or less.
- the Al content is preferably 0.80% or less.
- the Al content is preferably 0.0005% or more, and more preferably more than 0.0010%, more than 0.010%, or more than 0.10%.
- Al content is sol. It means the content of Al (acid-soluble Al).
- Ti, B, Mo and V are elements that are unavoidably mixed with carbon or nitrogen. May combine to form precipitates (carbides, nitrides). If carbides or nitrides are formed, these precipitates themselves may degrade the magnetic properties. Furthermore, it may impede the growth of crystal grains during the final annealing, degrading the magnetic properties. Therefore, the Ti content is 0.0030% or less, the B content is 0.0010% or less, the Mo content is 0.030% or less, and the V content is 0.0010% or less.
- the Ti content is preferably 0.0020% or less, the B content is preferably 0.0008% or less, the Mo content is preferably 0.020% or less, and the V content is 0. It is preferably 0.0008% or less. It should be noted that there is no need to set a lower limit for the content of these elements, and the content may be 0%, but extreme reduction may lead to an increase in manufacturing cost. Therefore, the Ti content is preferably 0.0005% or more, the B content is preferably 0.0001% or more, the Mo content is preferably 0.005% or more, and the V content is preferably 0.0001% or more.
- Ca, Mg, and REM are elements that form sulfides to fix S and contribute to the reduction of iron loss, so one or more selected from these is included so as to satisfy the following formula (i) .
- the element symbol in the above formula (i) represents the content (% by mass) of each element in the base steel sheet.
- Sn 0.10% or less
- Sb 0.10% or less
- Ni 0.10% or less
- Cr 0.10% or less
- Cu 0.10% or less
- Sn, Sb, Ni, Cr, and Cu are unavoidably It is an element to be mixed. However, since these elements are also elements that improve the magnetic properties, they may be included intentionally.
- the content of any element is 0.10% or less, preferably 0.05% or less.
- Sn 0.01% or more
- Sb 0.01% or more
- Ni 0.01% or more
- Cr 0.01% or more
- Cu It is preferable to contain one or more selected from 0.01% or more.
- the balance is Fe and impurities.
- impurities refers to components mixed in by various factors in raw materials such as ores, scraps, etc., and in the manufacturing process when steel is manufactured industrially. means something
- the type of insulation coating is not particularly limited, but it must be a composite coating of an inorganic compound such as a phosphoric acid-based, silica-based, or Zr-based compound and an organic resin. is preferred.
- an inorganic compound such as a phosphoric acid-based, silica-based, or Zr-based compound and an organic resin.
- chromate-based insulating coatings made mainly of dichromate were mainly used, but hexavalent chromium is highly toxic. is preferred.
- the type of organic resin is also not limited, and for example, one or more selected from acrylic resins, styrene resins, acrylic-styrene resins, epoxy resins, polyester resins, phenol resins, and urethane resins can be employed. .
- the chemical composition of the insulating coating must satisfy the following formula (ii). [M]-[C]+1/2 ⁇ [O]>0 (ii)
- [M] in the above formula (ii) means the total atomic concentration (at%) of one or more elements selected from Mn, Ti, Zr, Hf, Ta, Nb, V, Mo and Zn. and [C] and [O] respectively mean the atomic concentrations (at %) of C and O contained in the insulating coating.
- the insulating coating may contain at least one element selected from Mn, Ti, Zr, Hf, Ta, Nb, V and Mo, excluding Zn, within a range that satisfies the above formula (ii).
- one or more elements selected from Ti, Zr, Hf, Ta, Nb, V and Mo, excluding Zn and Mn are contained within a range that satisfies the above formula (ii).
- [M], [C] and [O] in the insulating coating shall be measured according to the following procedure.
- the entire non-oriented electrical steel sheet including the insulating coating is subjected to weight measurement and chemical composition analysis.
- the chemical composition in this embodiment, [M] is analyzed by ICP-MS.
- [C] is analyzed by burning the sample and measuring the infrared absorbance in accordance with JIS G 1211-3:2018 (hereinafter also referred to as "combustion-infrared absorption method").
- [O] is quantified by analyzing carbon dioxide generated by melting a sample in a graphite crucible in a He atmosphere with an infrared detector. Next, weight measurement and chemical composition analysis are similarly performed on the base material from which the insulating coating has been removed by alkali treatment. [M], [C] and [O] in the insulating coating are calculated from the difference before and after the insulating coating is removed.
- the insulating film contains an inorganic compound such as Zr and cannot be dissolved by alkali treatment.
- an inorganic compound such as Zr and cannot be dissolved by alkali treatment.
- only the surface layer is removed by mechanical polishing so that the entire insulating coating is included.
- alumina is used as an abrasive.
- only the base material adhering to the insulating coating is completely removed using hydrochloric acid.
- the separated insulating coating is subjected to chemical composition analysis by the method described above to obtain [M], [C] and [O] in the insulating coating.
- Thickness In the non-oriented electrical steel sheet of the present embodiment, there is no particular need to set a limit on the thickness of the base material steel sheet and the thickness of the insulating coating. However, when the thickness of the base steel plate is 0.30 mm or more, or the thickness of the insulating coating exceeds 1.0 ⁇ m, the carbon generated by the thermal decomposition of the organic resin is released from between the laminated steel plates. Since carbon dioxide gas is easily released, carbon is less likely to be released or remain.
- the thickness of the base steel sheet is preferably less than 0.30 mm, and the thickness of the insulating coating is preferably 1.0 ⁇ m or less.
- An iron core according to an embodiment of the present invention includes the non-oriented electrical steel sheet described above.
- the core is obtained by laminating a plurality of non-oriented electrical steel sheets.
- a part or all of the plurality of laminated non-oriented electrical steel sheets may be the non-oriented electrical steel sheets described above.
- a motor core includes a rotor core and a stator core.
- the rotor core is required to have strength. Therefore, the rotor core is obtained by punching out the non-oriented electrical steel sheet into a predetermined shape and laminating a plurality of sheets. That is, the rotor core in this embodiment is not subjected to stress relief annealing. Therefore, the chemical composition of the insulating coating in the non-oriented electrical steel sheet that constitutes the rotor core satisfies the above formula (ii).
- the stator core is required to have better magnetic properties. Therefore, the stator core is obtained by punching out the above-described non-oriented electrical steel sheet into a predetermined shape, laminating a plurality of sheets, and then performing stress relief annealing. As described above, when a plurality of non-oriented electrical steel sheets are laminated and then subjected to stress relief annealing, the organic resin in the insulating coating is thermally decomposed, and part of the carbon is liberated and remains. In the present invention, by including one or more elements selected from Mn, Ti, Zr, Hf, Ta, Nb, V, Mo and Zn in the insulating coating, Fixes carbon as carbide.
- the insulation coating after strain relief annealing that is, the insulation coating of the non-oriented electrical steel sheet forming the stator core contains carbides having a carbon content of 10 mg/m 2 or more.
- the fact that the amount of carbide in the insulating coating is 10 mg/m 2 or more in terms of carbon content means that the carbon liberated by thermal decomposition of the organic resin in the insulating coating is Mn, Ti, Zr, Hf , Ta, Nb, V, Mo, and Zn to form carbides with one or more elements selected as constituent elements of the insulating coating, thereby suppressing penetration into the base steel sheet.
- the amount of carbide in the insulating coating is 13 mg/m 2 or more, and may be 15 mg/m 2 or more.
- the above carbides are carbides containing one or more elements selected from Mn, Ti, Zr, Hf, Ta, Nb, V, Mo and Zn.
- the amount of carbide in terms of carbon content in the insulating coating means the amount of carbon in the carbide contained in the insulating coating formed on the surface of the base steel plate per unit area.
- the amount of carbide in the insulating coating is measured by the following procedure. First, the case where the insulating coating contains inorganic compounds such as phosphoric acid-based compounds and silica-based compounds and can be dissolved by alkali treatment will be described. First, only the insulating coating is dissolved by alkali treatment. At this time, the carbide remains in the alkaline solution as a residue without being dissolved. Therefore, after the residue is filtered and dried, the carbon content is measured by the combustion-infrared absorption method. Then, the weight is divided by the area of the surface of the melted base material steel plate where the insulating coating was formed to obtain the amount of carbide in terms of the carbon content in the insulating coating.
- the insulating film contains an inorganic compound such as Zr and cannot be dissolved by alkali treatment.
- the surface layer is removed by mechanical polishing so that the entire insulating coating is included.
- alumina is used as an abrasive.
- the base material adhering to the insulating coating is completely removed using hydrochloric acid.
- the residue is filtered, dried, and then the carbon content is measured by the combustion-infrared absorption method. Then, the amount of carbon in the insulating coating is obtained by dividing the amount of carbon by the area of the surface of the melted base steel plate on which the insulating coating was formed.
- all the measured carbon amounts are attributable to carbides.
- the amount of C concentration increase can be obtained, for example, by the following method. First, five 100 mm ⁇ 100 mm non-oriented electrical steel sheets are laminated and then annealed at 800° C. for 2 hours in an atmosphere of N 2 : 100% (dew point less than 30° C.). After that, among the five laminated non-oriented electrical steel sheets, one sheet in the center in the lamination direction is taken out, and the C concentration in the base steel sheet is measured. Then, the amount of increase from the C concentration in the base steel sheet before annealing is defined as the amount of increase in C concentration.
- the insulating coating is removed by mechanical polishing on both the front and back surfaces of the non-oriented electrical steel sheet.
- the insulating coating is removed, and after the base material portion is visible, 10 ⁇ m is further removed in the thickness direction. After that, the C concentration of the remaining base steel sheet is measured using the combustion-infrared absorption method.
- Non-oriented electrical steel sheets having various values of [M] ⁇ [C]+1/2 ⁇ [O] were prepared by adjusting the chemical composition of the insulating coating in the non-oriented electrical steel sheet No. 1.
- the amount of increase in C concentration was measured by the method described above.
- non-oriented electrical steel sheet that is, one non-oriented electrical steel sheet in the center of the lamination direction taken out after being laminated and annealed, was subjected to the Epstein test specified in JIS C 2550-1: 2011. bottom.
- the iron loss obtained by DC measurement between ⁇ 1.0 T was regarded as hysteresis loss Wh 10/1 at 1 Hz, and hysteresis loss Wh 10/400 at 400 Hz was calculated as 400 times that.
- FIG. 1 is a diagram showing the relationship between the amount of increase in C concentration and iron loss (hysteresis loss). As shown in FIG. 1, there is a good correlation between the increase in C concentration and iron loss, and the lower the increase in C concentration, the better the iron loss. From this, it can be seen that the increase in C concentration is useful as an indicator of the degree of iron loss improvement.
- Manufacturing method of non-oriented electrical steel sheet There is no particular limitation on the method of manufacturing the non-oriented electrical steel sheet of the present embodiment. For example, after heating a slab having the above chemical composition, hot rolling is performed, hot rolled sheet annealing is performed as necessary, pickling is performed, cold rolling is performed, and then finish annealing is performed. A base material steel plate is obtained. In addition, you may perform skin pass rolling after finish annealing as needed.
- hot-rolled sheet annealing is preferably carried out in the temperature range of 900 to 1100°C.
- cold rolling from the standpoint of rolling properties, the steel may be warmed to 80 to 300° C. before rolling and then rolled.
- Finish annealing is preferably performed in a temperature range of 700 to 1050°C, more preferably in a temperature range of 900°C or less.
- the rolling reduction in skin pass rolling is preferably 1 to 10%.
- the rolling reduction is preferably 1 to 10%.
- the reduction ratio is set to 10% or less, the non-uniformity of the strain amount for each crystal orientation can be maintained.
- an insulating coating is formed on the surface of the obtained base steel plate.
- the process of forming the insulation coating is not particularly limited, and the insulation coating treatment liquid having the chemical composition described above may be used to apply and dry the treatment liquid.
- the rate of temperature increase during drying and baking of the treatment liquid it is important to control the rate of temperature increase during drying and baking of the treatment liquid.
- the heating rate for drying and baking the treatment liquid is preferably 40°C/s or higher, more preferably 50°C/s or higher. If the heating rate is slow, the surface of the coating will be flattened, which will hinder the removal of carbon dioxide gas during strain relief annealing, and the amount of carbon that penetrates into the steel will increase. It becomes easy to avoid the bad influence of carbon by making minute unevenness
- the baking temperature is preferably in the range of 270°C or higher and 350°C or lower. If the baking temperature is less than 270°C, the surface of the coating is flattened, which inhibits the release of carbon dioxide gas during strain relief annealing, and the amount of carbon that penetrates into the steel increases. The higher is, the easier it is to avoid the adverse effects of carbon due to the formation of fine irregularities. On the other hand, if the baking temperature is too high, the resin in the film will start burning at this stage, resulting in poor punchability. It is more preferable to set the baking temperature to 300° C. or higher and 350° C. or lower.
- the surface of the base steel sheet on which the insulating coating is to be formed is subjected to any pretreatment such as degreasing treatment with alkali or the like, or pickling treatment with hydrochloric acid, sulfuric acid, phosphoric acid, etc., before applying the treatment liquid.
- any pretreatment such as degreasing treatment with alkali or the like, or pickling treatment with hydrochloric acid, sulfuric acid, phosphoric acid, etc.
- the steel may be left as it is after the finish annealing without performing these pretreatments.
- a method for manufacturing an iron core according to an embodiment of the present invention has a step of laminating the non-oriented electrical steel sheets described above. At this time, a plurality of non-oriented electrical steel sheets are laminated. A part or all of the plurality of laminated non-oriented electrical steel sheets may be the non-oriented electrical steel sheets described above.
- the motor core can be obtained by punching out the non-oriented electrical steel sheets into a predetermined shape, laminating them, and then subjecting them to stress relief annealing.
- the motor core referred to here is preferably the stator core.
- Conditions for stress relief annealing are not particularly limited, but from the viewpoint of improving magnetic properties, stress relief annealing is preferably performed at a high temperature. is preferred.
- Annealing time is also not limited, and is preferably 0.5 to 5.0 hours, for example. Note that the annealing time is the time during which the motor core is at 750° C. or higher, and the heating time and cooling time at less than 750° C. may be appropriately set.
- the non-oriented electrical steel sheet according to the present embodiment can be suitably used for applications in which stress relief annealing is performed in a temperature range of 750 to 900° C. after punching into a predetermined shape and laminating.
- a slab having a predetermined chemical composition was heated to 1150°C, then hot rolled at a finishing temperature of 800°C and a finishing plate thickness of 2.2 mm, and coiled at 700°C to form a hot-rolled steel sheet.
- the obtained hot-rolled steel sheet was subjected to hot-rolled steel annealing at 950° C. ⁇ 40 s, and the surface scale was removed by pickling. Further, the steel sheet was cold-rolled into a cold-rolled steel sheet having a thickness of 0.25 mm.
- the insulation coating is formed by baking at the temperature shown in Table 2 in the atmosphere, and the non-oriented electrical steel sheet. and Table 2 also shows the chemical composition and film thickness of the insulating coating.
- the obtained non-oriented electrical steel sheets were punched into a predetermined shape, five sheets were laminated, and stress relief annealing was performed by holding at 800° C. for 2 hours in an atmosphere of N 2 : 100% (dew point ⁇ 30° C.). . Then, one sheet in the center of the lamination direction is taken out of the five laminated non-oriented electrical steel sheets, and the iron loss W 10/400 (W/kg) was measured.
- Iron loss W 10/400 means the total iron loss generated under the condition that the maximum magnetic flux density is 1.0 T and the frequency is 400 Hz. In this example, when the iron loss W 10/400 was less than 11.5 W/kg, it was determined that the iron loss was low.
- test No. of the example of the present invention that satisfies the formula (ii). In 1 to 3, 5 to 7, 9, 10, 12, 16 to 18, 20, 21 and 23, the increase in C concentration was 1 ppm or less, and the iron loss was also excellent.
- Test No. of the comparative example As for Nos. 4, 8, 13 to 15 and 19, since the formula (ii) was not satisfied, the amount of increase in the C concentration increased, resulting in deterioration of iron loss.
- test No. Regarding No. 11 although the formula (ii) was not satisfied, the film thickness of the insulating coating exceeded 1.0 ⁇ m, so the amount of increase in the C concentration was not large.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Soft Magnetic Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
Description
前記母材鋼板の化学組成が、質量%で、
C:0.0030%以下、
Si:3.2~6.5%、
Mn:0.05~3.5%、
P:0.005~0.10%、
S:0.0030%以下、
Al:1.0%以下、
Ti:0.0030%以下、
B:0.0010%以下、
Mo:0.030%以下、
V:0.0010%以下、
Ca:0~0.0050%、
Mg:0~0.0050%、
REM:0~0.0050%、
残部:Feおよび不純物であり、
下記(i)式を満足し、
前記絶縁被膜の化学組成が、下記(ii)式を満足する、
無方向性電磁鋼板。
S-5/3×Mg-4/5×Ca-1/4×REM<0.0005 ・・・(i)
[M]-[C]+1/2×[O]>0 ・・・(ii)
但し、上記(i)式中の元素記号は、前記母材鋼板中の各元素の含有量(質量%)を表し、上記(ii)式中の[M]は、前記絶縁被膜中に含有されるMn、Ti、Zr、Hf、Ta、Nb、V、MoおよびZnから選択される1種類以上の元素の合計原子濃度(at%)を意味し、[C]および[O]は、それぞれ、前記絶縁被膜中に含有されるCおよびOの原子濃度(at%)を意味する。
Sn:0.10%以下、
Sb:0.10%以下、
Ni:0.10%以下、
Cr:0.10%以下、および
Cu:0.10%以下、から選択される1種以上を含有する、
上記(1)に記載の無方向性電磁鋼板。
上記(1)または(2)に記載の無方向性電磁鋼板。
上記(1)から(3)までのいずれかに記載の無方向性電磁鋼板。
上記(1)から(4)までのいずれかに記載の無方向性電磁鋼板。
上記(1)から(5)までのいずれかに記載の無方向性電磁鋼板。
上記(1)から(6)までのいずれかに記載の無方向性電磁鋼板。
鉄心。
鉄心の製造方法。
前記無方向性電磁鋼板は、母材鋼板と、前記母材鋼板の表面に形成された絶縁被膜と、を備え、
前記母材鋼板の化学組成が、質量%で、
C:0.0030%以下、
Si:3.2~6.5%、
Mn:0.05~3.5%、
P:0.005~0.10%、
S:0.0030%以下、
Al:1.0%以下、
Ti:0.0030%以下、
B:0.0010%以下、
Mo:0.030%以下、
V:0.0010%以下、
Ca:0~0.0050%、
Mg:0~0.0050%、
REM:0~0.0050%、
残部:Feおよび不純物であり、
下記(i)式を満足し、
前記ロータコアを構成する前記無方向性電磁鋼板における前記絶縁被膜の化学組成が、下記(ii)式を満足し、
前記ステータコアを構成する前記無方向性電磁鋼板における前記絶縁被膜中に含まれる炭化物の量が、炭素含有量換算で、10mg/m2以上である、
モータコア。
S-5/3×Mg-4/5×Ca-1/4×REM<0.0005 ・・・(i)
[M]-[C]+1/2×[O]>0 ・・・(ii)
但し、上記(i)式中の元素記号は、前記母材鋼板中の各元素の含有量(質量%)を表し、上記(ii)式中の[M]は、前記絶縁被膜中に含有されるMn、Ti、Zr、Hf、Ta、Nb、V、MoおよびZnから選択される1種類以上の元素の合計原子濃度(at%)を意味し、[C]および[O]は、それぞれ、前記絶縁被膜中に含有されるCおよびOの原子濃度(at%)を意味する。
モータコアの製造方法。
本発明の一実施形態に係る無方向性電磁鋼板は、母材鋼板と、母材鋼板の表面に形成された絶縁被膜と、を備える。以下に、母材鋼板および絶縁被膜の化学組成について説明する。
各元素の限定理由は下記のとおりである。なお、以下の説明において含有量についての「%」は、「質量%」を意味する。
Cは、鋼板の高強度化に寄与するが、鉄損劣化を引き起こす元素である。C含有量が0.0030%を超えると、無方向性電磁鋼板において鉄損劣化が生じ、良好な磁気特性を得ることができない。したがって、C含有量は0.0030%以下とする。C含有量は0.0027%以下であるのが好ましく、0.0025%以下であるのがより好ましい。なお、C含有量の過度の低減は、製造コストの上昇を招くため、0.0001%以上とするのが好ましく、0.0005%以上とするのがより好ましい。
Siは、鋼の電気抵抗を上昇させて鉄損を改善する元素である。また、Siは、固溶強化能が大きいため、鋼板の高強度化にも有効な元素である。一方、Si含有量が過剰であると、加工性が著しく劣化し、冷間圧延を実施することが困難となるおそれがある。したがって、Si含有量は3.2~6.5%とする。Si含有量は3.3%以上であるのが好ましく、6.0%以下、5.5%以下、5.0%以下、または4.5%以下であるのが好ましい。
Mnは、鋼の電気抵抗を上昇させて鉄損を改善する元素である。また、Mn含有量が低すぎる場合には、電気抵抗の上昇効果が小さいうえに、微細な硫化物(MnS)が析出することで、仕上焼鈍時の粒成長性が劣化するおそれがある。一方、Mn含有量が過剰であると、磁束密度が低下するおそれがある。したがって、Mn含有量は0.05~3.5%とする。Mn含有量は0.10%以上、または0.20%以上であるのが好ましく、3.0%以下、3.0%未満、2.8%以下、または2.5%以下であるのが好ましい。
Pは、不純物として鋼中に含まれ、その含有量が過剰であると、鋼板の延性が著しく低下するおそれがある。一方、Pは、固溶強化能が高い元素であるので、鋼板の高強度化においては有効な元素である。また、PはCと競合して粒界偏析することで歪取焼鈍後の炭化物形成を抑制する効果もある。したがって、P含有量は0.005~0.10%とする。P含有量は0.050%以下であるのが好ましい。
Sは、MnSの微細析出物を形成することで鉄損を増加させ、鋼板の磁気特性を劣化させる元素である。したがって、S含有量は0.0030%以下とする。S含有量は0.0015%以下であるのが好ましい。S含有量に下限を設ける必要はないが、Sを過度に低減させようとすると製鋼コストの大幅な増加を招く。そのため、S含有量は0.0005%以上であるのが好ましい。
Alは、鋼の電気抵抗を上昇させて鉄損を改善する元素である。しかしながら、Al含有量が過剰であると、磁束密度が低下するおそれがある。したがって、Al含有量は1.0%以下とする。Al含有量は0.80%以下であるのが好ましい。上記の効果を得たい場合は、Al含有量は0.0005%以上であるのが好ましく、0.0010%超、0.010%超、または0.10%以上であるのがより好ましい。なお、本明細書において、Al含有量は、sol.Al(酸可溶Al)の含有量を意味する。
B:0.0010%以下
Mo:0.030%以下
V:0.0010%以下
Ti、B、MoおよびVは、不可避的に混入する元素であり、炭素または窒素と結合して析出物(炭化物、窒化物)を形成しうる。炭化物または窒化物が形成された場合には、これらの析出物そのものが磁気特性を劣化させるおそれがある。さらには、仕上焼鈍中の結晶粒の成長を阻害して、磁気特性を劣化させるおそれがある。したがって、Ti含有量は0.0030%以下、B含有量は0.0010%以下、Mo含有量は0.030%以下、V含有量は0.0010%以下とする。
Mg:0~0.0050%
REM:0~0.0050%
Ca、MgおよびREMは、硫化物を形成してSを固定し、鉄損低減に寄与する元素であるため、これらから選択される1種以上を、下記(i)式を満足するよう含有させる。ただし、過剰に含有させると経済性が悪化するおそれがあるため、Ca:0.0050%以下、Mg:0.0050%以下、および、REM:0.0050%以下とする。
S-5/3×Mg-4/5×Ca-1/4×REM<0.0005 ・・・(i)
但し、上記(i)式中の元素記号は、母材鋼板中の各元素の含有量(質量%)を表す。
Sb:0.10%以下
Ni:0.10%以下
Cr:0.10%以下
Cu:0.10%以下
Sn、Sb、Ni、Cr、およびCuは、不可避的に混入する元素である。しかし、これらの元素は、磁気特性を向上させる元素でもあるため、意図的に含有させてもよい。
本発明における無方向性電磁鋼板において、絶縁被膜の種類については特に制限はないが、リン酸系、シリカ系、Zr系等の無機化合物と有機樹脂との複合皮膜であることが好ましい。従来、重クロム酸塩を主原料とするクロム酸塩系絶縁被膜が主に採用されてきたが、6価クロムは毒性が強いため、製造時の作業環境保全の点から、クロムを含まないことが好ましい。
[M]-[C]+1/2×[O]>0 ・・・(ii)
但し、上記(ii)式中の[M]は、Mn、Ti、Zr、Hf、Ta、Nb、V、MoおよびZnから選択される1種類以上の元素の合計原子濃度(at%)を意味し、[C]および[O]は、それぞれ、前記絶縁被膜中に含有されるCおよびOの原子濃度(at%)を意味する。
本実施形態の無方向性電磁鋼板においては、母材鋼板の板厚および絶縁被膜の膜厚について、特に制限を設ける必要はない。しかしながら、母材鋼板の板厚が0.30mm以上であるか、または絶縁被膜の膜厚が1.0μmを超える場合には、有機樹脂の熱分解で生じた炭素は、鋼板同士の積層間から炭酸ガスとして放出されやすくなるため、炭素の遊離・残存が生じにくくなる。
本発明の一実施形態に係る鉄心は、上述した無方向性電磁鋼板を含むものである。上記鉄心は、複数枚の無方向性電磁鋼板を積層することで得られる。積層する複数枚の無方向性電磁鋼板のうちの一部または全部が、上記の無方向性電磁鋼板であればよい。
上述のように、高温での歪取焼鈍によって絶縁被膜中の有機樹脂が熱分解し、遊離・残存した炭素が母材鋼板に侵入して、SiC、MnC、CrC等として析出すると、鉄損の劣化を招く。すなわち、歪取焼鈍後における母材鋼板中のC濃度増加量が大きいほど、鉄損の劣化が大きくなる。そのため、本発明においては、鉄損の改善度合いの指標として、C濃度増加量を用いることとする。
本実施形態の無方向性電磁鋼板を製造する方法については特に制限はない。例えば、上記の化学組成を有するスラブを加熱した後、熱間圧延を施し、必要に応じて熱延板焼鈍を行い、酸洗し、冷間圧延を施し、その後、仕上焼鈍を施すことで、母材鋼板が得られる。なお、必要に応じて、仕上げ焼鈍後にスキンパス圧延を施してもよい。
本発明の一実施形態に係る鉄心の製造方法は、上述した無方向性電磁鋼板を積層する工程を有する。この際、複数枚の無方向性電磁鋼板を積層することとなる。積層する複数枚の無方向性電磁鋼板のうちの一部または全部が、上記の無方向性電磁鋼板であればよい。
Claims (11)
- 母材鋼板と、前記母材鋼板の表面に形成された絶縁被膜と、を備え、
前記母材鋼板の化学組成が、質量%で、
C:0.0030%以下、
Si:3.2~6.5%、
Mn:0.05~3.5%、
P:0.005~0.10%、
S:0.0030%以下、
Al:1.0%以下、
Ti:0.0030%以下、
B:0.0010%以下、
Mo:0.030%以下、
V:0.0010%以下、
Ca:0~0.0050%、
Mg:0~0.0050%、
REM:0~0.0050%、
残部:Feおよび不純物であり、
下記(i)式を満足し、
前記絶縁被膜の化学組成が、下記(ii)式を満足する、
無方向性電磁鋼板。
S-5/3×Mg-4/5×Ca-1/4×REM<0.0005 ・・・(i)
[M]-[C]+1/2×[O]>0 ・・・(ii)
但し、上記(i)式中の元素記号は、前記母材鋼板中の各元素の含有量(質量%)を表し、上記(ii)式中の[M]は、前記絶縁被膜中に含有されるMn、Ti、Zr、Hf、Ta、Nb、V、MoおよびZnから選択される1種類以上の元素の合計原子濃度(at%)を意味し、[C]および[O]は、それぞれ、前記絶縁被膜中に含有されるCおよびOの原子濃度(at%)を意味する。 - 前記母材鋼板の化学組成が、Feの一部に代えて、質量%で、
Sn:0.10%以下、
Sb:0.10%以下、
Ni:0.10%以下、
Cr:0.10%以下、および
Cu:0.10%以下、から選択される1種以上を含有する、
請求項1に記載の無方向性電磁鋼板。 - 前記母材鋼板の板厚が0.30mm未満であり、前記絶縁被膜の膜厚が1.0μm以下である、
請求項1または請求項2に記載の無方向性電磁鋼板。 - 所定の形状に打ち抜いて積層した後に、750~900℃の温度範囲で歪取焼鈍が施される用途に用いられる、
請求項1から請求項3までのいずれかに記載の無方向性電磁鋼板。 - 前記無方向性電磁鋼板を5枚積層してから、N2:100%、露点-30℃の雰囲気において、800℃で2時間保持する焼鈍を施した後、積層した前記5枚の無方向性電磁鋼板のうちの積層方向中央の1枚の無方向性電磁鋼板の母材鋼板中のC濃度を測定した際に、焼鈍前の前記無方向性電磁鋼板の母材鋼板中のC濃度からの増加量であるC濃度増加量が1ppm以下である、
請求項1から請求項4までのいずれかに記載の無方向性電磁鋼板。 - 前記無方向性電磁鋼板を5枚積層してから、N2:100%、露点-30℃の雰囲気において、800℃で2時間保持する焼鈍を施した後、積層した前記5枚の無方向性電磁鋼板のうちの積層方向中央の1枚の無方向性電磁鋼板を用いて測定される鉄損W10/400が、11.5W/kg未満である、
請求項1から請求項5までのいずれかに記載の無方向性電磁鋼板。 - 前記無方向性電磁鋼板を5枚積層してから、N2:100%、露点-30℃の雰囲気において、800℃で2時間保持する焼鈍を施した後、積層した前記5枚の無方向性電磁鋼板のうちの積層方向中央の1枚の無方向性電磁鋼板における前記絶縁被膜中に含まれる炭化物の量が、炭素含有量換算で、10mg/m2以上である、
請求項1から請求項6までのいずれかに記載の無方向性電磁鋼板。 - 請求項1から請求項7までのいずれかに記載の無方向性電磁鋼板を含む、
鉄心。 - 請求項1から請求項7までのいずれかに記載の無方向性電磁鋼板を積層する工程を有する、
鉄心の製造方法。 - 複数の無方向性電磁鋼板が積層された、ロータコアおよびステータコアを含むモータコアであって、
前記無方向性電磁鋼板は、母材鋼板と、前記母材鋼板の表面に形成された絶縁被膜と、を備え、
前記母材鋼板の化学組成が、質量%で、
C:0.0030%以下、
Si:3.2~6.5%、
Mn:0.05~3.5%、
P:0.005~0.10%、
S:0.0030%以下、
Al:1.0%以下、
Ti:0.0030%以下、
B:0.0010%以下、
Mo:0.030%以下、
V:0.0010%以下、
Ca:0~0.0050%、
Mg:0~0.0050%、
REM:0~0.0050%、
残部:Feおよび不純物であり、
下記(i)式を満足し、
前記ロータコアを構成する前記無方向性電磁鋼板における前記絶縁被膜の化学組成が、下記(ii)式を満足し、
前記ステータコアを構成する前記無方向性電磁鋼板における前記絶縁被膜中に含まれる炭化物の量が、炭素含有量換算で、10mg/m2以上である、
モータコア。
S-5/3×Mg-4/5×Ca-1/4×REM<0.0005 ・・・(i)
[M]-[C]+1/2×[O]>0 ・・・(ii)
但し、上記(i)式中の元素記号は、前記母材鋼板中の各元素の含有量(質量%)を表し、上記(ii)式中の[M]は、前記絶縁被膜中に含有されるMn、Ti、Zr、Hf、Ta、Nb、V、MoおよびZnから選択される1種類以上の元素の合計原子濃度(at%)を意味し、[C]および[O]は、それぞれ、前記絶縁被膜中に含有されるCおよびOの原子濃度(at%)を意味する。 - 請求項1から請求項7までのいずれかに記載の無方向性電磁鋼板に対して、所定の形状に打ち抜いて積層した後に、750~900℃の温度範囲で歪取焼鈍を施す、
モータコアの製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22881064.4A EP4417716A1 (en) | 2021-10-13 | 2022-10-12 | Non-oriented electromagnetic steel sheet, iron core and motor core, and method for manufacturing iron core and motor core |
CN202280068755.8A CN118103537A (zh) | 2021-10-13 | 2022-10-12 | 无取向性电磁钢板、铁芯和电动机铁芯、以及铁芯和电动机铁芯的制造方法 |
KR1020247014783A KR20240076824A (ko) | 2021-10-13 | 2022-10-12 | 무방향성 전자 강판, 철심 및 모터 코어, 그리고 철심 및 모터 코어의 제조 방법 |
JP2023554591A JP7560795B2 (ja) | 2021-10-13 | 2022-10-12 | 無方向性電磁鋼板、鉄心およびモータコア、ならびに鉄心およびモータコアの製造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021-168280 | 2021-10-13 | ||
JP2021168280 | 2021-10-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023063369A1 true WO2023063369A1 (ja) | 2023-04-20 |
Family
ID=85988651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/038106 WO2023063369A1 (ja) | 2021-10-13 | 2022-10-12 | 無方向性電磁鋼板、鉄心およびモータコア、ならびに鉄心およびモータコアの製造方法 |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP4417716A1 (ja) |
JP (1) | JP7560795B2 (ja) |
KR (1) | KR20240076824A (ja) |
CN (1) | CN118103537A (ja) |
TW (1) | TWI837877B (ja) |
WO (1) | WO2023063369A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000054085A (ja) | 1998-06-03 | 2000-02-22 | Nkk Corp | 鉄損が低く打ち抜き性に優れた無方向性電磁鋼板 |
JP2009068055A (ja) * | 2007-09-12 | 2009-04-02 | Jfe Steel Kk | 無方向性電磁鋼板 |
WO2016125783A1 (ja) * | 2015-02-05 | 2016-08-11 | 新日鐵住金株式会社 | 電磁鋼板 |
WO2018025941A1 (ja) * | 2016-08-05 | 2018-02-08 | 新日鐵住金株式会社 | 無方向性電磁鋼板、無方向性電磁鋼板の製造方法及びモータコアの製造方法 |
JP2021031714A (ja) * | 2019-08-21 | 2021-03-01 | 日本製鉄株式会社 | 無方向性電磁鋼板およびその製造方法 |
WO2021117325A1 (ja) * | 2019-12-09 | 2021-06-17 | Jfeスチール株式会社 | 無方向性電磁鋼板とモータコアならびにそれらの製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001295001A (ja) * | 2000-04-10 | 2001-10-26 | Kawasaki Steel Corp | 高周波磁気特性および溶接性に優れる無方向性電磁鋼板 |
-
2022
- 2022-10-12 JP JP2023554591A patent/JP7560795B2/ja active Active
- 2022-10-12 WO PCT/JP2022/038106 patent/WO2023063369A1/ja active Application Filing
- 2022-10-12 TW TW111138711A patent/TWI837877B/zh active
- 2022-10-12 KR KR1020247014783A patent/KR20240076824A/ko unknown
- 2022-10-12 CN CN202280068755.8A patent/CN118103537A/zh active Pending
- 2022-10-12 EP EP22881064.4A patent/EP4417716A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000054085A (ja) | 1998-06-03 | 2000-02-22 | Nkk Corp | 鉄損が低く打ち抜き性に優れた無方向性電磁鋼板 |
JP2009068055A (ja) * | 2007-09-12 | 2009-04-02 | Jfe Steel Kk | 無方向性電磁鋼板 |
WO2016125783A1 (ja) * | 2015-02-05 | 2016-08-11 | 新日鐵住金株式会社 | 電磁鋼板 |
WO2018025941A1 (ja) * | 2016-08-05 | 2018-02-08 | 新日鐵住金株式会社 | 無方向性電磁鋼板、無方向性電磁鋼板の製造方法及びモータコアの製造方法 |
JP2021031714A (ja) * | 2019-08-21 | 2021-03-01 | 日本製鉄株式会社 | 無方向性電磁鋼板およびその製造方法 |
WO2021117325A1 (ja) * | 2019-12-09 | 2021-06-17 | Jfeスチール株式会社 | 無方向性電磁鋼板とモータコアならびにそれらの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP4417716A1 (en) | 2024-08-21 |
TW202325865A (zh) | 2023-07-01 |
JPWO2023063369A1 (ja) | 2023-04-20 |
TWI837877B (zh) | 2024-04-01 |
KR20240076824A (ko) | 2024-05-30 |
CN118103537A (zh) | 2024-05-28 |
JP7560795B2 (ja) | 2024-10-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6478004B1 (ja) | 無方向性電磁鋼板 | |
JP6690714B2 (ja) | 無方向性電磁鋼板、無方向性電磁鋼板の製造方法及びモータコアの製造方法 | |
WO2018131710A1 (ja) | 無方向性電磁鋼板及び無方向性電磁鋼板の製造方法 | |
EP3770294B1 (en) | Non-oriented electrical steel sheet | |
JP7143900B2 (ja) | 無方向性電磁鋼板 | |
JP7143901B2 (ja) | 無方向性電磁鋼板 | |
JP6794704B2 (ja) | 無方向性電磁鋼板、無方向性電磁鋼板の製造方法及びモータコアの製造方法 | |
JP5713100B2 (ja) | 無方向性電磁鋼板、その製造方法、モータ鉄心用積層体及びその製造方法 | |
JP7001210B1 (ja) | 無方向性電磁鋼板およびその製造方法 | |
JP5447167B2 (ja) | 無方向性電磁鋼板およびその製造方法 | |
JP6724712B2 (ja) | 無方向性電磁鋼板 | |
WO2023063369A1 (ja) | 無方向性電磁鋼板、鉄心およびモータコア、ならびに鉄心およびモータコアの製造方法 | |
JP2003013190A (ja) | 高級無方向性電磁鋼板 | |
JP7328597B2 (ja) | 無方向性電磁鋼板およびその製造方法 | |
CN114729415B (zh) | 无取向电钢板及其制造方法 | |
KR102706290B1 (ko) | 무방향성 전자 강판 및 그 제조 방법 | |
TWI854529B (zh) | 無方向性電磁鋼板及其製造方法 | |
WO2023176865A1 (ja) | 無方向性電磁鋼板およびモータコアならびにそれらの製造方法 | |
WO2023176866A1 (ja) | 無方向性電磁鋼板およびその製造方法 | |
WO2022176933A1 (ja) | 無方向性電磁鋼板およびその製造方法 | |
WO2024172106A1 (ja) | 無方向性電磁鋼板およびその製造方法 | |
WO2024162429A1 (ja) | 無方向性電磁鋼板およびその製造方法 | |
WO2021199400A1 (ja) | 無方向性電磁鋼板およびその製造方法 | |
KR20230134148A (ko) | 무방향성 전자 강판, 모터 코어, 무방향성 전자 강판의 제조 방법 및 모터 코어의 제조 방법 |
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: 22881064 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023554591 Country of ref document: JP |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112024006408 Country of ref document: BR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280068755.8 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 20247014783 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022881064 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: 2022881064 Country of ref document: EP Effective date: 20240513 |
|
ENP | Entry into the national phase |
Ref document number: 112024006408 Country of ref document: BR Kind code of ref document: A2 Effective date: 20240401 |