JP5037728B2 - 一方向性電磁鋼板の製造方法 - Google Patents
一方向性電磁鋼板の製造方法 Download PDFInfo
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims description 58
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 238000000137 annealing Methods 0.000 claims description 104
- 229910000831 Steel Inorganic materials 0.000 claims description 89
- 239000010959 steel Substances 0.000 claims description 89
- 238000005096 rolling process Methods 0.000 claims description 77
- 238000001953 recrystallisation Methods 0.000 claims description 51
- 238000001816 cooling Methods 0.000 claims description 31
- 238000005261 decarburization Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000005098 hot rolling Methods 0.000 claims description 25
- 238000004804 winding Methods 0.000 claims description 22
- 230000009467 reduction Effects 0.000 claims description 21
- 238000005121 nitriding Methods 0.000 claims description 20
- 230000001186 cumulative effect Effects 0.000 claims description 19
- 238000005097 cold rolling Methods 0.000 claims description 16
- 239000010960 cold rolled steel Substances 0.000 claims description 15
- 239000012535 impurity Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 229910052787 antimony Inorganic materials 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 229910052718 tin Inorganic materials 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 33
- 230000004907 flux Effects 0.000 description 23
- 238000002474 experimental method Methods 0.000 description 15
- 239000003112 inhibitor Substances 0.000 description 15
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 14
- 239000013078 crystal Substances 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000000395 magnesium oxide Substances 0.000 description 7
- 239000002244 precipitate Substances 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910052797 bismuth Inorganic materials 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
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- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
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- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
- H01F1/14775—Fe-Si based alloys in the form of sheets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—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
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Description
質量%で、Si:0.8%〜7%、及び酸可溶性Al:0.01%〜0.065%を含有し、C含有量が0.085%以下であり、N含有量が0.012%以下であり、Mn含有量が1%以下であり、S含有量(%)を[S]、Se含有量(%)を[Se]と表したとき、「Seq.=[S]+0.406×[Se]」で定義されるS当量Seq.が0.015%以下であり、残部がFe及び不可避的不純物からなる珪素鋼スラブを1280℃以下の温度で加熱する工程と、
加熱された前記珪素鋼スラブの熱間圧延を行って熱間圧延鋼帯を得る工程と、
前記熱間圧延鋼帯の焼鈍を行って焼鈍鋼帯を得る工程と、
前記焼鈍鋼帯を冷間圧延して冷間圧延鋼帯を得る工程と、
前記冷間圧延鋼帯の脱炭焼鈍を行って、一次再結晶が生じた脱炭焼鈍鋼帯を得る工程と、
焼鈍分離剤を前記脱炭焼鈍鋼帯に塗布する工程と、
前記脱炭焼鈍鋼帯の仕上げ焼鈍を行って、二次再結晶を生じさせる工程と、
を有し、
更に、前記脱炭焼鈍の開始から仕上げ焼鈍における二次再結晶の発現までの間に、前記脱炭焼鈍鋼帯のN含有量を増加させる窒化処理を行う工程を有し、
前記熱間圧延を行って熱間圧延鋼帯を得る工程は、
終了温度が950℃以下の仕上げ圧延を行う工程と、
前記仕上げ圧延の終了から2秒間以内に冷却を開始し、700℃以下の温度で巻取りを行う工程と、
を有し、
前記焼鈍を行って焼鈍鋼帯を得る工程における前記熱間圧延鋼帯の800℃〜1000℃の温度範囲内での昇温速度を5℃/sec以上とし、
前記仕上げ圧延の終了から前記巻取りを行うまでの間の冷却速度を10℃/sec以上とすることを特徴とする一方向性電磁鋼板の製造方法。
(2)
前記仕上げ圧延における累積圧下率を93%以上とすることを特徴とする(1)に記載の一方向性電磁鋼板の製造方法。
(3)
前記仕上げ圧延における最終3パスの累積圧下率を40%以上とすることを特徴とする(1)又は(2)に記載の一方向性電磁鋼板の製造方法。
(4)
前記珪素鋼スラブは、更に、Cu:0.4質量%を含有することを特徴とする(1)〜(3)のいずれかに記載の一方向性電磁鋼板の製造方法。
(5)
前記珪素鋼スラブは、更に、質量%で、Cr:0.3%以下、P:0.5%以下、Sn:0.3%以下、Sb:0.3%以下、Ni:1%以下、Bi:0.01%以下、B:0.01%以下、Ti:0.01%以下、及びTe:0.01%以下からなる群から選択された少なくとも一種を含有することを特徴とする(1)〜(4)のいずれかに記載の一方向性電磁鋼板の製造方法。
ここで、第1の実験について説明する。第1の実験では、熱間圧延における仕上げ圧延の終了温度と磁束密度B8との関係について調査した。磁束密度B8は、50Hzにて800A/mの磁場が印加されたときに、一方向性電磁鋼板に発生する磁束密度である。
ここで、第2の実験について説明する。第2の実験では、焼鈍(ステップS2)の昇温速度と磁束密度B8との関係について調査した。
実施例1では、表1に示す成分を含有し、残部がFe及び不可避的不純物からなる鋼S1〜S7を用いて厚さが40mmの珪素鋼スラブを作製した。次いで、珪素鋼スラブを1150℃の温度で加熱し、その後、熱間圧延により厚さが2.3mmの熱間圧延鋼帯を得た。このとき、仕上げ圧延の終了温度を845℃〜855℃の範囲で変化させた。また、仕上げ圧延の累積圧下率は94%、仕上げ圧延の最終3パスの累積圧下率は45%とした。そして、仕上げ圧延の終了から1秒間経過した時点で冷却を開始し、490℃〜520℃の巻取り温度で鋼帯をコイル状に巻取った。冷却の開始から巻取りを行うまでの冷却速度は13℃/sec〜14℃/secとした。
実施例2では、表3に示す成分を含有し、残部がFe及び不可避的不純物からなる鋼S11を用いて厚さが40mmの珪素鋼スラブを作製した。次いで、珪素鋼スラブを1150℃の温度で加熱し、その後、熱間圧延により厚さが2.3mmの熱間圧延鋼帯を得た。このとき、仕上げ圧延の累積圧下率、最終3パスの累積圧下率、及び終了温度を表4に示すものとした。そして、仕上げ圧延の終了から表4に示す時間だけ経過した時点で冷却を開始し、表4に示す巻取り温度で鋼帯をコイル状に巻取った。冷却の開始から巻取りを行うまでの冷却速度は表4に示すものとした。
Claims (5)
- 質量%で、Si:0.8%〜7%、及び酸可溶性Al:0.01%〜0.065%を含有し、C含有量が0.085%以下であり、N含有量が0.012%以下であり、Mn含有量が1%以下であり、S含有量(%)を[S]、Se含有量(%)を[Se]と表したとき、「Seq.=[S]+0.406×[Se]」で定義されるS当量Seq.が0.015%以下であり、残部がFe及び不可避的不純物からなる珪素鋼スラブを1280℃以下の温度で加熱する工程と、
加熱された前記珪素鋼スラブの熱間圧延を行って熱間圧延鋼帯を得る工程と、
前記熱間圧延鋼帯の焼鈍を行って焼鈍鋼帯を得る工程と、
前記焼鈍鋼帯を冷間圧延して冷間圧延鋼帯を得る工程と、
前記冷間圧延鋼帯の脱炭焼鈍を行って、一次再結晶が生じた脱炭焼鈍鋼帯を得る工程と、
焼鈍分離剤を前記脱炭焼鈍鋼帯に塗布する工程と、
前記脱炭焼鈍鋼帯の仕上げ焼鈍を行って、二次再結晶を生じさせる工程と、
を有し、
更に、前記脱炭焼鈍の開始から仕上げ焼鈍における二次再結晶の発現までの間に、前記脱炭焼鈍鋼帯のN含有量を増加させる窒化処理を行う工程を有し、
前記熱間圧延を行って熱間圧延鋼帯を得る工程は、
終了温度が950℃以下の仕上げ圧延を行う工程と、
前記仕上げ圧延の終了から2秒間以内に冷却を開始し、700℃以下の温度で巻取りを行う工程と、
を有し、
前記焼鈍を行って焼鈍鋼帯を得る工程における前記熱間圧延鋼帯の800℃〜1000℃の温度範囲内での昇温速度を5℃/sec以上とし、
前記仕上げ圧延の終了から前記巻取りを行うまでの間の冷却速度を10℃/sec以上とすることを特徴とする一方向性電磁鋼板の製造方法。 - 前記仕上げ圧延における累積圧下率を93%以上とすることを特徴とする請求項1に記載の一方向性電磁鋼板の製造方法。
- 前記仕上げ圧延における最終3パスの累積圧下率を40%以上とすることを特徴とする請求項1又は2に記載の一方向性電磁鋼板の製造方法。
- 前記珪素鋼スラブは、更に、Cu:0.4質量%を含有することを特徴とする請求項1乃至3のいずれか1項に記載の一方向性電磁鋼板の製造方法。
- 前記珪素鋼スラブは、更に、質量%で、Cr:0.3%以下、P:0.5%以下、Sn:0.3%以下、Sb:0.3%以下、Ni:1%以下、及びBi:0.01%以下からなる群から選択された少なくとも一種を含有することを特徴とする請求項1乃至4のいずれか1項に記載の一方向性電磁鋼板の製造方法。
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