JP4746716B2 - 方向性電磁鋼板の製造方法、巻き鉄心用方向性電磁鋼板、及び巻き鉄心 - Google Patents
方向性電磁鋼板の製造方法、巻き鉄心用方向性電磁鋼板、及び巻き鉄心 Download PDFInfo
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- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 title claims description 57
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 55
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 238000000137 annealing Methods 0.000 claims description 148
- 229910000831 Steel Inorganic materials 0.000 claims description 126
- 239000010959 steel Substances 0.000 claims description 126
- 238000005261 decarburization Methods 0.000 claims description 47
- 239000013078 crystal Substances 0.000 claims description 41
- 230000004907 flux Effects 0.000 claims description 30
- 239000010960 cold rolled steel Substances 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000005097 cold rolling Methods 0.000 claims description 23
- 238000005096 rolling process Methods 0.000 claims description 20
- 239000012535 impurity Substances 0.000 claims description 16
- 238000005098 hot rolling Methods 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 229910052717 sulfur Inorganic materials 0.000 claims description 12
- 238000005121 nitriding Methods 0.000 claims description 11
- 229910052711 selenium Inorganic materials 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 9
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 229910052714 tellurium Inorganic materials 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 238000001953 recrystallisation Methods 0.000 description 25
- 238000002474 experimental method Methods 0.000 description 21
- 239000003112 inhibitor Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 239000012298 atmosphere Substances 0.000 description 14
- 229910052739 hydrogen Inorganic materials 0.000 description 11
- 239000001257 hydrogen Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 150000002431 hydrogen Chemical class 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000005554 pickling Methods 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000005524 ceramic coating Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 3
- 239000008119 colloidal silica Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C21D8/1272—Final recrystallisation annealing
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- 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
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Description
次に、本発明の第1の実施形態について説明する。第1の実施形態に係る方向性電磁鋼板は、Si:2.5質量%〜4.5質量%%を含有し、残部がFe及び不可避的不純物からなる。また、結晶粒の形状に関し、平均値Caveは2以上であり、平均値Daveは100mm以上である。更に、方向性電磁鋼板の磁束密度の値(B8)は1.94T以上である。
次に、本発明の第2の実施形態について説明する。第2の実施形態では、上述のような方向性電磁鋼板を製造する。図3は、第2の実施形態に係る方向性電磁鋼板の製造方法を示すフローチャートである。
次に、本発明の第3の実施形態について説明する。第3の実施形態でも、上述のような方向性電磁鋼板を製造する。図4は、第3の実施形態に係る方向性電磁鋼板の製造方法を示すフローチャートである。
次に、第2の実施形態及び第3の実施形態における脱炭焼鈍の条件の詳細について説明する。
次に、第2の実施形態及び第3の実施形態における仕上焼鈍の条件の詳細について説明する。
先ず、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スラブを、実験室の真空溶解炉を用いて作製した。次いで、1350℃でスラブの焼鈍(スラブ加熱)を1時間行い、その後、熱間圧延を行って熱間圧延鋼板を得た。
先ず、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スラブを、実験室の真空溶解炉を用いて作製した。次いで、1400℃でスラブの焼鈍(スラブ加熱)を1時間行い、その後、熱間圧延を行って熱間圧延鋼板を得た。
先ず、表5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スラブを、実験室の真空溶解炉を用いて作製した。次いで、1150℃でスラブの焼鈍(スラブ加熱)を1時間行い、その後、熱間圧延を行って熱間圧延鋼板を得た。
先ず、表8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スラブを、実験室の真空溶解炉を用いて作製した。次いで、1350℃でスラブの焼鈍(スラブ加熱)を1時間行い、その後、熱間圧延を行って熱間圧延鋼板を得た。
Claims (10)
- C:0.02質量%〜0.10質量%、Si:2.5質量%〜4.5質量%、Mn:0.01質量%〜0.15質量%、S:0.001質量%〜0.050質量%、酸可溶性Al:0.01質量%〜0.05質量%、N:0.002質量%〜0.015質量%、及びTe:0.0005質量%〜0.1000質量%を含有し、残部がFe及び不可避的不純物からなるスラブを1280℃以上に加熱する工程と、
前記スラブの熱間圧延を行って熱間圧延鋼板を得る工程と、
前記熱間圧延鋼板の焼鈍を行って焼鈍鋼板を得る工程と、
前記焼鈍鋼板の冷間圧延を行って冷間圧延鋼板を得る工程と、
前記冷間圧延鋼板の脱炭焼鈍を行って脱炭焼鈍鋼板を得る工程と、
前記脱炭焼鈍鋼板をコイル状に巻き取る工程と、
前記コイル状の脱炭焼鈍鋼板の仕上焼鈍を行う工程と、
を有し、
前記脱炭焼鈍時又は前記脱炭焼鈍前の前記冷間圧延鋼板の昇温の際に、前記冷間圧延鋼板を30℃/sec以上100℃/sec以下の速度で800℃以上の温度まで昇温し、
前記仕上焼鈍時の前記脱炭焼鈍鋼板の昇温の際に、前記脱炭焼鈍鋼板を750℃以上1150℃以下の温度範囲において20℃/h以下の速度で昇温することを特徴とする方向性電磁鋼板の製造方法。 - 前記スラブは、更にSeを含有し、
S及びSeの総含有量が0.001質量%〜0.050質量%であることを特徴とする請求項1に記載の方向性電磁鋼板の製造方法。 - C:0.02質量%〜0.10質量%、Si:2.5質量%〜4.5質量%、Mn:0.05質量%〜0.50質量%、酸可溶性Al:0.010質量%〜0.050質量%、N:0.001質量%〜0.015質量%、及びTe:0.0005質量%〜0.1000質量%を含有し、S及びSeの総含有量が0.02質量%以下であり、残部がFe及び不可避的不純物からなるスラブを1280℃未満で加熱する工程と、
前記スラブの熱間圧延を行って熱間圧延鋼板を得る工程と、
前記熱間圧延鋼板の焼鈍を行って焼鈍鋼板を得る工程と、
前記焼鈍鋼板の冷間圧延を行って冷間圧延鋼板を得る工程と、
前記冷間圧延鋼板の脱炭焼鈍を行って脱炭焼鈍鋼板を得る工程と、
前記脱炭焼鈍鋼板をコイル状に巻き取る工程と、
前記コイル状の脱炭焼鈍鋼板の仕上焼鈍を行う工程と、
を有し、
更に、前記冷間圧延鋼板又は前記脱炭焼鈍鋼板の窒化焼鈍を行う工程を有し、
前記脱炭焼鈍時又は前記脱炭焼鈍前の前記冷間圧延鋼板の昇温の際に、前記冷間圧延鋼板を30℃/sec以上100℃/sec以下の速度で800℃以上の温度まで昇温し、
前記仕上焼鈍時の前記脱炭焼鈍鋼板の昇温の際に、前記脱炭焼鈍鋼板を750℃以上1150℃以下の温度範囲において20℃/h以下の速度で昇温することを特徴とする方向性電磁鋼板の製造方法。 - 前記スラブは、更にBi:0.0005質量%〜0.1000質量%を含有することを特徴とする請求項1に記載の方向性電磁鋼板の製造方法。
- 前記スラブは、更にBi:0.0005質量%〜0.1000質量%を含有することを特徴とする請求項2に記載の方向性電磁鋼板の製造方法。
- 前記スラブは、更にBi:0.0005質量%〜0.1000質量%を含有することを特徴とする請求項3に記載の方向性電磁鋼板の製造方法。
- Si:2.5質量%〜4.5質量%を含有し、
残部がFe及び不可避的不純物からなり、
結晶粒の「(圧延方向の長さ)/(板幅方向の長さ)」で表わされる形状比の平均値が2以上であり、
結晶粒の圧延方向の長さの平均値が100mm以上であり、
50Hzの周波数にて800A/mの磁場を付与したときの磁束密度の値が1.94T以上であることを特徴とする巻き鉄心用方向性電磁鋼板。 - 円相当径が2mm未満の結晶粒で構成される領域の面積率が1%以下であることを特徴とする請求項7に記載の巻き鉄心用方向性電磁鋼板。
- 方向性電磁鋼板を含む巻き鉄心であって、
前記方向性電磁鋼板は、
Si:2.5質量%〜4.5質量%を含有し、
残部がFe及び不可避的不純物からなり、
結晶粒の「(圧延方向の長さ)/(板幅方向の長さ)」で表わされる形状比の平均値が2以上であり、
結晶粒の圧延方向の長さの平均値が100mm以上であり、
50Hzの周波数にて800A/mの磁場を付与したときの磁束密度の値が1.94T以上であることを特徴とする巻き鉄心。 - 前記方向性電磁鋼板における、円相当径が2mm未満の結晶粒で構成される領域の面積率が1%以下であることを特徴とする請求項9に記載の巻き鉄心。
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