JPWO2020145317A1 - 方向性電磁鋼板及び方向性電磁鋼板の製造方法 - Google Patents
方向性電磁鋼板及び方向性電磁鋼板の製造方法 Download PDFInfo
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- JPWO2020145317A1 JPWO2020145317A1 JP2020565186A JP2020565186A JPWO2020145317A1 JP WO2020145317 A1 JPWO2020145317 A1 JP WO2020145317A1 JP 2020565186 A JP2020565186 A JP 2020565186A JP 2020565186 A JP2020565186 A JP 2020565186A JP WO2020145317 A1 JPWO2020145317 A1 JP WO2020145317A1
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- Prior art keywords
- steel sheet
- boron
- aluminum
- grain
- coating
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- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 85
- 239000010959 steel Substances 0.000 claims abstract description 85
- 239000011248 coating agent Substances 0.000 claims abstract description 77
- 238000000576 coating method Methods 0.000 claims abstract description 77
- 229910052796 boron Inorganic materials 0.000 claims abstract description 45
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims description 28
- 239000012298 atmosphere Substances 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 14
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 6
- 238000004993 emission spectroscopy Methods 0.000 claims description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- OJMOMXZKOWKUTA-UHFFFAOYSA-N aluminum;borate Chemical compound [Al+3].[O-]B([O-])[O-] OJMOMXZKOWKUTA-UHFFFAOYSA-N 0.000 abstract description 30
- 238000000034 method Methods 0.000 abstract description 22
- 238000004611 spectroscopical analysis Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 26
- 239000013078 crystal Substances 0.000 description 19
- 229910052742 iron Inorganic materials 0.000 description 12
- 238000000137 annealing Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 230000007423 decrease Effects 0.000 description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000002585 base Substances 0.000 description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 8
- 229960002645 boric acid Drugs 0.000 description 8
- 235000010338 boric acid Nutrition 0.000 description 8
- 238000001035 drying Methods 0.000 description 8
- 239000004327 boric acid Substances 0.000 description 7
- 229910052839 forsterite Inorganic materials 0.000 description 7
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002243 precursor Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910000976 Electrical steel Inorganic materials 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229910052810 boron oxide Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
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- 238000009792 diffusion process Methods 0.000 description 3
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- 230000006872 improvement Effects 0.000 description 3
- 230000005381 magnetic domain Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910001593 boehmite Inorganic materials 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002612 dispersion medium Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000010010 raising Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- GURLNXRFQUUOMW-UHFFFAOYSA-K [Al](Cl)(Cl)Cl.[AlH3] Chemical class [Al](Cl)(Cl)Cl.[AlH3] GURLNXRFQUUOMW-UHFFFAOYSA-K 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum compound Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- VGTPKLINSHNZRD-UHFFFAOYSA-N oxoborinic acid Chemical compound OB=O VGTPKLINSHNZRD-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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- C23C18/02—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
- C23C18/12—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
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- 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
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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
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Abstract
Description
特許文献2には、鉄心加工後の歪取り焼鈍(応力除去焼鈍)を施した後もその効果が消失しない磁区細分化手段が開示されている。
本発明は上記の知見に基づきなされたものであって、その要旨は以下のとおりである。
前記鋼板上に設けられた、アルミニウムとホウ素とを含む酸化物からなる絶縁被膜と、を有し、
前記酸化物は、結晶質酸化物を含み、
グロー放電発光分光分析法によって測定される、前記絶縁被膜と前記鋼板との界面におけるアルミニウムに対するホウ素の発光強度比の最大値は、前記絶縁被膜におけるアルミニウムに対するホウ素の発光強度比の2.5倍以上4.0倍以下である、方向性電磁鋼板。
(2)Al2O3/B2O3換算の質量比が1.8〜2.6のホウ素源およびアルミニウム源を含む塗布液を鋼板表面に塗布することと、
露点が0〜40℃で水素を0〜25体積%含む不活性ガス雰囲気中で、前記鋼板を450〜600℃の範囲にある所定の温度まで、平均の昇温速度を2〜5℃/秒で加熱したのち、200℃以下まで冷却速度10℃/秒以上の冷却速度で冷却することと、
前記鋼板を、750℃まで昇温速度を平均で10〜100℃/秒で昇温し、750〜1000℃の温度域で20〜120秒の間熱処理することと、を有する、方向性電磁鋼板の製造方法。
以下、本実施形態に係る方向性電磁鋼板について説明する。本実施形態に係る方向性電磁鋼板は、鋼板(母材鋼板)と、鋼板上に設けられた、アルミニウムとホウ素とを含む酸化物からなる絶縁被膜と、を有する。
次に、本実施形態に係る方向性電磁鋼板の製造方法について説明する。本実施形態に係る方向性電磁鋼板の製造方法は、Al2O3/B2O3換算の質量比が1.8〜2.6のホウ素源およびアルミニウム源を含む塗布液を鋼板表面に塗布することと、露点が0〜40℃で水素を0〜25体積%含む不活性ガス雰囲気中で、前記鋼板を450〜600℃の範囲にある所定の温度まで、平均の昇温速度を2〜5℃/秒で加熱した後、200℃以下まで冷却速度10℃/秒以上の冷却速度で冷却することと、前記鋼板を、750℃まで昇温速度を平均で10〜100℃/秒で昇温し、750〜1000℃の温度域で20〜120秒の間熱処理することと、を有する。
以下、上記のプロセス(i)〜(iii)との対応を言及しつつ、本実施形態に係る方向性電磁鋼板の製造方法について詳細に説明する。
上記質量比は、好ましくは1.9以上2.4以下、より好ましくは2.0以上2.2以下である。
なお、塗布液は、本発明の奏する効果を阻害しない範囲において、上述した以外の成分を含んでいてもよい。
また、加熱時における雰囲気は、水素を0〜25体積%含む。これにより、鋼板と絶縁被膜の間の酸化を抑制し、密着性を確保することができる。これに対し、水素の含有量が25体積%を超えても、特に問題はないが、コストがかかりすぎる観点から好ましくない。
なお、750℃を越えて昇温を行う場合、750℃を超えた時点から次に750℃未満となるまでの時間を熱処理時間とする。
あるいは、焼き付け時の雰囲気は、塗布液の乾燥時における雰囲気と同一であってもよい。
市販のホウ酸試薬及び、酸化アルミニウム(Al2O3)粉末(平均粒径:0.4μm)を表2に示した割合で混合した。なお、ホウ酸は酸化ホウ素(B2O3)相当に換算して秤量した。これに蒸留水を加えてスラリーを作製した。
絶縁被膜を形成した鋼板の片側の被膜を除去し、鋼板の曲りから被膜張力を算出した。この張力は、フォルステライト層を含まない、ホウ酸アルミニウム被膜のみの張力である。絶縁被膜の除去には水酸化ナトリウム水溶液を用いた。張力は15MPa以上を高い張力と定義した。表2の結果から、実施例では、張力の高い絶縁被膜が得られていることがわかる。
市販の酸化アルミニウム(Al2O3)粉末(平均粒径:0.4μm)100gに対し、ホウ酸試薬を酸化ホウ素(B2O3)相当で45.3gとし、これに蒸留水を加えてスラリーを作製した。Al2O3/B2O3は2.2である。
Claims (2)
- 鋼板と、
前記鋼板上に設けられた、アルミニウムとホウ素とを含む酸化物からなる絶縁被膜と、を有し、
前記酸化物は、結晶質酸化物を含み、
グロー放電発光分光分析法によって測定される、前記絶縁被膜と前記鋼板との界面におけるアルミニウムに対するホウ素の発光強度比の最大値は、前記絶縁被膜におけるアルミニウムに対するホウ素の発光強度比の2.5倍以上4.0倍以下である、方向性電磁鋼板。 - Al2O3/B2O3換算の質量比が1.8〜2.6のホウ素源およびアルミニウム源を含む塗布液を鋼板表面に塗布することと、
露点が0〜40℃で水素を0〜25体積%含む不活性ガス雰囲気中で、前記鋼板を450〜600℃の範囲にある所定の温度まで、平均の昇温速度を2〜5℃/秒で加熱したのち、200℃以下まで冷却速度10℃/秒以上の冷却速度で冷却することと、
前記鋼板を、750℃まで昇温速度を平均で10〜100℃/秒で昇温し、750〜1000℃の温度域で20〜120秒の間熱処理することと、を有する、方向性電磁鋼板の製造方法。
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