JP6432671B2 - 方向性電磁鋼板の製造方法 - Google Patents
方向性電磁鋼板の製造方法 Download PDFInfo
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- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 title claims description 36
- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 238000000137 annealing Methods 0.000 claims description 123
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 113
- 229910052742 iron Inorganic materials 0.000 claims description 53
- 238000001953 recrystallisation Methods 0.000 claims description 45
- 229910000831 Steel Inorganic materials 0.000 claims description 39
- 239000010959 steel Substances 0.000 claims description 39
- 229910052787 antimony Inorganic materials 0.000 claims description 23
- 229910052698 phosphorus Inorganic materials 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 20
- 229910052718 tin Inorganic materials 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 15
- 229910052750 molybdenum Inorganic materials 0.000 claims description 15
- 229910052748 manganese Inorganic materials 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 238000005097 cold rolling Methods 0.000 claims description 11
- 229910052717 sulfur Inorganic materials 0.000 claims description 10
- 229910052839 forsterite Inorganic materials 0.000 claims description 9
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 8
- 229910052758 niobium Inorganic materials 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 7
- 229910052797 bismuth Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 238000005098 hot rolling Methods 0.000 claims description 6
- 229910052714 tellurium Inorganic materials 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 description 51
- 239000000047 product Substances 0.000 description 27
- 230000008569 process Effects 0.000 description 20
- 238000005204 segregation Methods 0.000 description 19
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- 238000002474 experimental method Methods 0.000 description 12
- 239000003112 inhibitor Substances 0.000 description 12
- 230000002829 reductive effect Effects 0.000 description 12
- 239000013078 crystal Substances 0.000 description 11
- 238000005261 decarburization Methods 0.000 description 11
- 230000005389 magnetism Effects 0.000 description 9
- 238000002791 soaking Methods 0.000 description 9
- 239000010408 film Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000009749 continuous casting Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000010894 electron beam technology Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 239000012467 final product Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000005381 magnetic domain Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000003917 TEM image Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052711 selenium Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
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- 230000005284 excitation Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- 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
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Description
[1]地鉄の表面にフォルステライト被膜を有する方向性電磁鋼板であって、
前記地鉄が、質量%で、Si:2.0〜8.0%およびMn:0.005〜1.0%を含有すると共に、Sb:0.010〜0.200%、Sn:0.010〜0.200%、Mo:0.010〜0.200%、Cu:0.010〜0.200%、およびP:0.010〜0.200%の少なくとも一種類を含有し、残部がFeおよび不可避的不純物の成分組成を有し、
前記地鉄の結晶粒界近傍の転位密度が1.0×1013m−2以下であることを特徴とする方向性電磁鋼板。
該熱延板に必要に応じて熱延板焼鈍を施す工程と、
前記熱延板に、1回または中間焼鈍を挟む2回以上の冷間圧延を施して、最終板厚の冷延板を得る工程と、
該冷延板に一次再結晶焼鈍を施し、一次再結晶板を得る工程と、
該一次再結晶板の表面に焼鈍分離剤を塗布し、次いで二次再結晶のための仕上げ焼鈍を施して、地鉄の表面にフォルステライト被膜を有する二次再結晶板を得る工程と、
該二次再結晶板に750℃以上で5秒以上60秒以下の平坦化焼鈍を施す工程と、
を含む一連の工程からなる方向性電磁鋼板の製造方法であって、
前記仕上げ焼鈍後に前記二次再結晶板の温度が800℃から400℃まで低下するのに要する時間をT(hr)としたとき、前記平坦化焼鈍工程では、前記二次再結晶板にかかるライン張力Pr(MPa)を、下記条件式(1)を満たすように制御し、前記地鉄の結晶粒界近傍の転位密度を1.0×1013m−2以下とすることを特徴とする方向性電磁鋼板の製造方法。
記
Pr≦−0.075T+18(ただし、T>10、5<Pr)・・・(1)
C:0.010〜0.100%を含有すると共に、
(i)Al:0.010〜0.050%およびN:0.003〜0.020%、
(ii)S:0.002〜0.030%および/またはSe:0.003〜0.030%、
の少なくとも一方を含有する上記[3]〜[6]のいずれか一項に記載の方向性電磁鋼板の製造方法。
質量%で、C:0.063%、Si:3.35%、Mn:0.09%、S:0.0032%、N:0.0020%、sol.Al:0.0044%を含んだ鋼スラブA、およびC:0.065%、Si:3.33%、Mn:0.09%、S:0.0030%、N:0.0028%、sol.Al:0.0048%、Sb:0.037%を含んだ鋼スラブBを、それぞれ連続鋳造にて製造し、1200℃でスラブ加熱した。その後、これらの鋼スラブに熱間圧延を施して、板厚2.0mmの熱延板に仕上げた。その後、熱延板に1050℃で40秒の熱延板焼鈍を施した後、冷間圧延で板厚0.23mmの冷延板に仕上げた。さらに、冷延板に840℃で130秒、50%H2−50%N2、露点60℃の湿潤雰囲気下で脱炭焼鈍を兼ねる一次再結晶焼鈍を施し、一次再結晶板を得た。その後、一次再結晶板の表面にMgOを主体とする焼鈍分離剤を塗布し、1200℃で10時間、H2雰囲気下で保定する二次再結晶のための仕上げ焼鈍を施して、二次再結晶板を得た。仕上げ焼鈍後の800℃から400℃までの滞留時間T(hr)は40時間とした。なお、本明細書において「二次再結晶板の温度」は、二次再結晶板のコイルの端面(コイルをアップエンドに載置した際の最下部)の、最内巻と最外巻の中間位置で測定した温度とする。
質量%で、C:0.048%、Si:3.18%、Mn:0.14%、S:0.0020%、N:0.0040%、sol.Al:0.0072%、Sb:0.059%を含んだ鋼スラブCを連続鋳造にて製造し、1220℃でスラブ加熱した。その後、この鋼スラブに熱間圧延を施して、板厚2.2mmの熱延板に仕上げた。その後、熱延板に1025℃で30秒の熱延板焼鈍を施した後、冷間圧延で板厚0.27mmの冷延板に仕上げた。さらに、冷延板に850℃で100秒、50%H2−50%N2、露点62℃の湿潤雰囲気下で脱炭焼鈍を兼ねる一次再結晶焼鈍を施し、一次再結晶板を得た。その後、一次再結晶板の表面にMgOを主体とする焼鈍分離剤を塗布し、1200℃で10時間、H2雰囲気下で保定する二次再結晶のための仕上げ焼鈍を施して、二次再結晶板を得た。この際、仕上げ焼鈍後の冷却速度を変化させ、800℃から400℃までの滞留時間T(hr)を種々に変更した。
Siは、方向性電磁鋼板の比抵抗を高め、鉄損を低減するのに必要な元素である。上記効果は、2.0%未満では十分ではなく、一方、8.0%を超えると、加工性が低下し、圧延して製造すること困難となる。よって、Si含有量は2.0%以上8.0%以下とする。好ましくは2.5%以上4.5%以下である。
Mnは、鋼の熱間加工性を改善するために必要な元素である。上記効果は、0.005%未満では十分ではなく、一方、1.0%を超えると、製品板の磁束密度が低下するようになる。よって、Mn含有量は0.005%以上1.0%以下とする。好ましくは0.02%以上0.30%以下である。
Cは、粒界を強化する効果を有する。上記効果は、0.010%以上で十分に発揮され、スラブに割れが生じる恐れがない。一方、0.100%以下であれば、脱炭焼鈍で、磁気時効の起こらない0.005mass%以下に低減することができる。よって、C含有量は0.010%以上0.100%以下とするのが好ましい。より好ましくは0.020%以上0.080%以下である。
質量%で、C:0.032%、Si:3.25%、Mn:0.06%、N:0.0026%、sol.Al:0.0095%、Sn:0.120%、P:0.029%を含んだ鋼スラブを連続鋳造にて製造し、1220℃でスラブ加熱した。その後、この鋼スラブに熱間圧延を施して、板厚2.7mmの熱延板に仕上げた。その後、熱延板に1025℃で30秒の熱延板焼鈍を施した後、冷間圧延で板厚0.23mmの冷延板に仕上げた。その後、冷延板に840℃で100秒、55%H2−45%N2、露点58℃の湿潤雰囲気下で脱炭焼鈍を兼ねる一次再結晶焼鈍を施し、一次再結晶板を得た。その後、一次再結晶板の表面にMgOを主体とする焼鈍分離剤を塗布し、1200℃で5時間、H2雰囲気下で保定する二次再結晶のための仕上げ焼鈍を施して、二次再結晶板を得た。この際、仕上げ焼鈍後の冷却速度を変化させ、800℃から400℃までの滞留時間Tを表1記載の様に変化させた。
表2記載の成分を含んだ種々の鋼スラブを連続鋳造にて製造し、1380℃でスラブ加熱した。その後、これらの鋼スラブに熱間圧延を施して、厚さ2.5mmの熱延板に仕上げた。その後、熱延板に950℃で30秒の熱延板焼鈍を施した後、冷間圧延により板厚を1.7mmとした。その後、1100℃で30秒の中間焼鈍を施した後、100℃の温間圧延で板厚0.23mmの冷延板に仕上げた。その後、冷延板に850℃で100秒、60%H2−40%N2、露点64℃の湿潤雰囲気下で脱炭焼鈍を兼ねる一次再結晶焼鈍を施し、一次再結晶板を得た。その後、一次再結晶板の表面にMgOを主体とする焼鈍分離剤を塗布し、1200℃で5時間、H2雰囲気下で保定する二次再結晶のための仕上げ焼鈍を施して、二次再結晶板を得た。仕上げ焼鈍後の800℃から400℃までの滞留時間Tは45hrとした。
質量%で、C:0.058%、Si:3.68%、Mn:0.34%、N:0.0011%、sol.Al:0.0023%、Sb:0.090%、P:0.077%を含んだ鋼スラブを連続鋳造にて製造し、1220℃でスラブ加熱した。その後、この鋼スラブに熱間圧延を施して、板厚2.0mmの熱延板に仕上げた。その後、熱延板に1060℃で100秒の熱延板焼鈍を施した後、冷間圧延で板厚0.23mmの冷延板に仕上げた。その後、冷延板に840℃で100秒、55%H2−45%N2、露点60℃の湿潤雰囲気下で脱炭焼鈍を兼ねる一次再結晶焼鈍を施し、一次再結晶板を得た。その後、一次再結晶板の表面にMgOを主体とする焼鈍分離剤を塗布し、1200℃で5時間、H2雰囲気下で保定する二次再結晶のための仕上げ焼鈍を施して、二次再結晶板を得た。仕上げ焼鈍後の冷却としては、一定温度に保持することなしの冷却(保定なし)と、750℃で10時間保持する冷却(1回保定)と、800℃、700℃、600℃、500℃で各々2時間ずつ保持する冷却(4回保定)のいずれかを採用した。1回保定と4回保定では、コイル内部の温度ムラが解消されるため、保定回数を多くするほど、保定以外の冷却速度は速くした。その結果、800℃から400℃までの滞留時間Tは、保定なしで40時間、1回保定で30時間、4回保定で20時間であった。
Claims (5)
- 質量%で、Si:2.0〜8.0%およびMn:0.005〜1.0%を含有すると共に、Sb:0.010〜0.200%、Sn:0.010〜0.200%、Mo:0.010〜0.200%、Cu:0.010〜0.200%、およびP:0.010〜0.200%の少なくとも一種類を含有し、C:0.010〜0.100%を含有すると共に、Al:0.01%以下、N:0.005%以下、S:0.005%以下、およびSe:0.005%以下を含有し、残部がFeおよび不可避的不純物の成分組成を有する鋼スラブに熱間圧延を施して、熱延板を得る工程と、
該熱延板に必要に応じて熱延板焼鈍を施す工程と、
前記熱延板に、1回または中間焼鈍を挟む2回以上の冷間圧延を施して、最終板厚の冷延板を得る工程と、
該冷延板に一次再結晶焼鈍を施し、一次再結晶板を得る工程と、
該一次再結晶板の表面に焼鈍分離剤を塗布し、次いで二次再結晶のための仕上げ焼鈍を施して、地鉄の表面にフォルステライト被膜を有する二次再結晶板を得る工程と、
該二次再結晶板に750℃以上で5秒以上60秒以下の平坦化焼鈍を施す工程と、
を含む一連の工程からなる方向性電磁鋼板の製造方法であって、
前記仕上げ焼鈍後に前記二次再結晶板の温度が800℃から400℃まで低下するのに要する時間を滞留時間T(hr)としたとき、当該滞留時間Tを測定し、前記平坦化焼鈍工程では、測定された滞留時間Tに基づいて、前記二次再結晶板にかかるライン張力Pr(MPa)を、下記条件式(1)を満たすように制御し、前記地鉄の結晶粒界近傍の転位密度を1.0×1013m-2以下とすることを特徴とする方向性電磁鋼板の製造方法。
記
Pr≦-0.075T+18(ただし、T>10、5<Pr)・・・(1) - 質量%で、Si:2.0〜8.0%およびMn:0.005〜1.0%を含有すると共に、Sb:0.010〜0.200%、Sn:0.010〜0.200%、Mo:0.010〜0.200%、Cu:0.010〜0.200%、およびP:0.010〜0.200%の少なくとも一種類を含有し、C:0.010〜0.100%を含有すると共に、(i)Al:0.010〜0.050%およびN:0.003〜0.020%、(ii)S:0.002〜0.030%および/またはSe:0.003〜0.030%、の少なくとも一方を含有し、残部がFeおよび不可避的不純物の成分組成を有する鋼スラブに熱間圧延を施して、熱延板を得る工程と、
該熱延板に必要に応じて熱延板焼鈍を施す工程と、
前記熱延板に、1回または中間焼鈍を挟む2回以上の冷間圧延を施して、最終板厚の冷延板を得る工程と、
該冷延板に一次再結晶焼鈍を施し、一次再結晶板を得る工程と、
該一次再結晶板の表面に焼鈍分離剤を塗布し、次いで二次再結晶のための仕上げ焼鈍を施して、地鉄の表面にフォルステライト被膜を有する二次再結晶板を得る工程と、
該二次再結晶板に750℃以上で5秒以上60秒以下の平坦化焼鈍を施す工程と、
を含む一連の工程からなる方向性電磁鋼板の製造方法であって、
前記仕上げ焼鈍後に前記二次再結晶板の温度が800℃から400℃まで低下するのに要する時間を滞留時間T(hr)としたとき、当該滞留時間Tを測定し、前記平坦化焼鈍工程では、測定された滞留時間Tに基づいて、前記二次再結晶板にかかるライン張力Pr(MPa)を、下記条件式(1)を満たすように制御し、前記地鉄の結晶粒界近傍の転位密度を1.0×1013m-2以下とすることを特徴とする方向性電磁鋼板の製造方法。
記
Pr≦-0.075T+18(ただし、T>10、5<Pr)・・・(1) - 前記仕上げ焼鈍後、前記二次再結晶板の冷却の過程で、800℃から400℃までの所定の一定温度で5時間以上前記二次再結晶板を保持する、請求項1又は2に記載の方向性電磁鋼板の製造方法。
- 前記成分組成は、質量%でSb:0.010〜0.100%、Cu:0.015〜0.100%、およびP:0.010〜0.100%を含有する請求項1〜3のいずれか一項に記載の方向性電磁鋼板の製造方法。
- 前記成分組成は、質量%でさらに、Ni:0.010〜1.50%、Cr:0.01〜0.50%、Bi:0.005〜0.50%、Te:0.005〜0.050%、およびNb:0.0010〜0.0100%の少なくとも一種類を含有する請求項1〜4のいずれか一項に記載の方向性電磁鋼板の製造方法。
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EP3266896B1 (en) | 2019-10-16 |
CN107406936B (zh) | 2019-02-05 |
JPWO2016140373A1 (ja) | 2017-06-29 |
KR101989725B1 (ko) | 2019-06-14 |
EP3266896A1 (en) | 2018-01-10 |
US20180066346A1 (en) | 2018-03-08 |
BR112017018925A2 (ja) | 2018-05-15 |
CA2977208A1 (en) | 2016-09-09 |
WO2016140373A1 (ja) | 2016-09-09 |
KR20170110705A (ko) | 2017-10-11 |
CA2977208C (en) | 2020-04-21 |
EP3266896A4 (en) | 2018-01-10 |
RU2666393C1 (ru) | 2018-09-07 |
BR112017018925B1 (pt) | 2021-10-26 |
US10889880B2 (en) | 2021-01-12 |
WO2016139818A1 (ja) | 2016-09-09 |
WO2016140373A8 (ja) | 2017-05-26 |
MX2017011321A (es) | 2017-12-07 |
CN107406936A (zh) | 2017-11-28 |
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