JP2022545793A - 無方向性電磁鋼板及びその製造方法 - Google Patents
無方向性電磁鋼板及びその製造方法 Download PDFInfo
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- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052742 iron Inorganic materials 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000002791 soaking Methods 0.000 claims abstract description 14
- 229910052718 tin Inorganic materials 0.000 claims abstract description 8
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000003723 Smelting Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims abstract description 5
- 229910052729 chemical element Inorganic materials 0.000 claims abstract description 5
- 238000005098 hot rolling Methods 0.000 claims abstract description 5
- 238000004321 preservation Methods 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 50
- 239000010959 steel Substances 0.000 claims description 50
- 238000005096 rolling process Methods 0.000 claims description 26
- 230000006698 induction Effects 0.000 claims description 19
- 238000000137 annealing Methods 0.000 claims description 13
- 238000005097 cold rolling Methods 0.000 claims description 13
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 12
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 238000010079 rubber tapping Methods 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 3
- 238000002407 reforming Methods 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 2
- 235000013339 cereals Nutrition 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 11
- 230000009931 harmful effect Effects 0.000 description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 229910052593 corundum Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 7
- 229910001845 yogo sapphire Inorganic materials 0.000 description 7
- 238000001953 recrystallisation Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000000254 damaging effect Effects 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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- C21D1/28—Normalising
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- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- 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
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- 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
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Abstract
Description
(1)製錬及び鋳造工程と、
(2)熱間圧延工程と、
(3)焼ならし(normalizing)工程と、
(4)冷間圧延工程と、
(5)冷間圧延鋼板を350℃~750℃の初期温度から均熱温度(soaking temperature)へと50~800℃/秒の加熱速度にて急速加熱し、均熱及び熱保存を行う、連続焼なまし(continuous annealing)工程と、
(6)絶縁コーティングを施して最終無方向性電磁鋼板(完成品の無方向性電磁鋼板)を得る工程と、
を含む方法を提供する。
本発明例A9~A21の無方向性電磁鋼板及び比較例A1~A8の従来の鋼板を、以下の工程により製造した。
(1)溶融鉄鋼くずを、表1に示す組成に従って調製した。
転炉製錬後、取鍋スラグ(取瓶スラグ)を改質し、RH精錬における脱炭及び合金化に供した。溶融鉄を連続鋳造し、120~250mmの厚さ及び800~1400mmの幅を有する連続鋳造スラブを得た。
(2)熱間圧延:連続鋳造スラブを順次、粗圧延及び仕上げ圧延に供して、熱間圧延鋼板を得た。熱間圧延鋼板は、1.5~2.8mmの厚さを有していた。
(3)焼ならし:熱間圧延鋼板を焼ならしし、焼ならしプロセス中、均熱温度は800~1000℃であり、均熱時間は1~180秒であった。
(4)冷間圧延:単一の冷間圧延プロセスを使用することにより、鋼板を0.10~0.30mmの厚さに直接圧延した。
(5)連続焼なまし:冷間圧延鋼板を350℃~750℃の初期温度から均熱温度へと50~800℃/秒の加熱速度にて急速加熱し、均熱及び熱保存を行った。
(6)絶縁コーティングを施して、0.10~0.30mmの厚さを有する最終無方向性電磁鋼板を得た。
Claims (11)
- 質量百分率で表される以下の化学元素:
0<C≦0.005%、Si:2.0~3.5%、Mn:0.1~2.0%、Sn及びSbのうち少なくとも1つ:0.003~0.2%、Al:0.2~1.8%、
を含み、残部はFe及び不可避的不純物である、
無方向性電磁鋼板。 - 90~140μmの平均結晶粒径を有することを特徴とする、請求項1に記載の無方向性電磁鋼板。
- 前記不可避的不純物が、P≦0.2%、S≦0.003%、N≦0.002%、O≦0.002%、及びTi≦0.0015%を含むことを特徴とする、請求項1に記載の無方向性電磁鋼板。
- 前記電磁鋼板が、介在物MnS及びCu2Sを含有し、前記介在物が150~500nmのサイズを有することを特徴とする、請求項1に記載の無方向性電磁鋼板。
- 前記介在物が、球体又は回転楕円体の形状を有し、円又は楕円の平面投影を有することを特徴とする、請求項4に記載の無方向性電磁鋼板。
- 前記介在物が、楕円の平面投影を有し、前記楕円における長軸径の短軸径に対する比が≦4.0であることを特徴とする、請求項5に記載の無方向性電磁鋼板。
- 前記電磁鋼板は、鉄損P10/400が≦11.0W/kgであり、磁気誘導B50が≧1.66Tであり、かつ、磁気異方性が≦10%であり、前記磁気異方性は、圧延方向に平行な鉄損P10/400と圧延方向に垂直な鉄損P10/400との差の、圧延方向に平行な鉄損P10/400と圧延方向に垂直な鉄損P10/400との合計に対する比であることを特徴とする、請求項1~請求項6のいずれか1つに記載の無方向性電磁鋼板。
- 請求項1~請求項7のいずれか1つに記載の無方向性電磁鋼板の製造方法であって、
(1)製錬及び鋳造工程と、
(2)熱間圧延工程と、
(3)焼ならし工程と、
(4)冷間圧延工程と、
(5)冷間圧延鋼板を350℃~750℃の初期温度から均熱温度へと50~800℃/秒の加熱速度にて急速加熱し、均熱及び熱保存を行う、連続焼なまし工程と、
(6)絶縁コーティングを施して最終無方向性電磁鋼板を得る工程と、
を含む、製造方法。 - 工程(1)が、転炉出鋼プロセスを含み、取鍋スラグが、(CaO)/(Al2O3)≧0.85かつTFe≧13%[式中、(CaO)及び(Al2O3)は、それぞれCaO及びAl2O3の含有率を質量百分率で表す]を満たすように、前記転炉出鋼プロセスにおいて改質処理に供されることを特徴とする、請求項8に記載の製造方法。
- 工程(4)において、単一の冷間圧延プロセスを使用することにより、前記鋼板が、最終製品厚さ0.10~0.30mmに直接圧延されることを特徴とする、請求項8に記載の製造方法。
- 工程(5)において、前記加熱速度が100~600℃/秒であることを特徴とする、請求項8に記載の製造方法。
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