JP2021516726A - 高珪素方向性電磁鋼板の製造方法 - Google Patents
高珪素方向性電磁鋼板の製造方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 138
- 239000010959 steel Substances 0.000 title claims abstract description 138
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 91
- 239000010703 silicon Substances 0.000 title claims abstract description 90
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 74
- 229910000676 Si alloy Inorganic materials 0.000 claims abstract description 92
- 239000002245 particle Substances 0.000 claims abstract description 83
- 238000000137 annealing Methods 0.000 claims abstract description 52
- 239000011248 coating agent Substances 0.000 claims abstract description 40
- 238000000576 coating method Methods 0.000 claims abstract description 39
- 239000007787 solid Substances 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 48
- 239000007789 gas Substances 0.000 claims description 35
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 27
- 238000005261 decarburization Methods 0.000 claims description 27
- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 238000001953 recrystallisation Methods 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 238000010791 quenching Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 18
- 230000008569 process Effects 0.000 description 15
- 239000007921 spray Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000000047 product Substances 0.000 description 7
- DHKVCYCWBUNNQH-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(1,4,5,7-tetrahydropyrazolo[3,4-c]pyridin-6-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)C=NN2 DHKVCYCWBUNNQH-UHFFFAOYSA-N 0.000 description 5
- 229910052729 chemical element Inorganic materials 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 3
- 229940075614 colloidal silicon dioxide Drugs 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 239000011162 core material Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 2
- 239000000391 magnesium silicate Substances 0.000 description 2
- 229910052919 magnesium silicate Inorganic materials 0.000 description 2
- 235000019792 magnesium silicate Nutrition 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010288 cold spraying Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
Description
(1)冷間圧延が行われた鋼板に対して脱炭焼鈍を行うステップと、
(2)高珪素合金粒子を完全に固態の状態で脱炭焼鈍された吹付け対象物の鋼板の表面に高速に衝突させて、吹付け対象物の鋼板表面に高珪素合金コーティングを形成するステップと、
(3)分離剤を塗布して乾燥させるステップと、
(4)焼鈍を行うステップと、を含む。
Tc/Ts≧(x1-x2)/(x3-x1)
(1)本発明に係る高珪素方向性電磁鋼板の製造方法は、通常の生産ラインの上で、1セットのコールドスプレー処理装置を新たに追加することで、高珪素方向性電磁鋼板を量産可能にすることができ、これによって、従来の製造方法のコストが高いという課題を解決した。
(2)本発明に係る高珪素方向性電磁鋼板の製造方法は、高珪素合金粒子を低温で固体の状態で吹付け対象物の鋼板表面に堆積させ、高珪素合金粒子の酸化や相転移などの不利な影響を著しく低減ひいては完全に除去可能であることによって、ステップ(4)の焼鈍工程中の浸珪の安定性を保証し、従来の製造方法における高珪素鋼板の品質が不安定であるという課題を解決した。
(3)本発明に係る製造方法で得られた高珪素方向性電磁鋼板は優れた磁気性能を有し、該方法は幅広い応用の将来性を有する。
実施例1-10及び比較例1-5の高珪素方向性電磁鋼板は、
(1)表1中の各化学元素の質量%を含有する鋼スラブを1050〜1215℃で再加熱し、その後、1050〜1150℃で熱間圧延し、焼鈍し、酸洗を行い、すぐ後で、シングルスタンド圧延機を用いて圧延するステップと、
(2)露点が40〜65℃で湿っぽい窒素ガス及び水素ガスの混合雰囲気で、820〜850℃の焼鈍温度で冷間圧延が行われた鋼板に対して脱炭焼鈍を行い、脱炭焼鈍後の吹付け対象物の鋼板表面の総酸素含有量が700ppm未満、C元素含有量が50ppm未満であるように制御するステップと、
(3)高珪素合金粒子を完全に固態の状態で、500-900m/sの速度で、脱炭焼鈍が行われた吹付け対象物の鋼板の表面に衝突させるように、内表面が円錐形であるラバールノズルを用いて高珪素合金粒子と加熱された400℃の作動ガス(窒素ガス)を吹付け対象物の鋼板表面に噴射し、ここで、高珪素合金粒子中のSi元素の含有量が10〜50wt%であり、高珪素合金粒子の粒径が1-80μmであり、ノズル出口の高珪素合金粒子の温度が300℃であるように制御し、ノズルの出口と吹付け対象物の鋼板表面との間の距離が25mmであるように制御するステップと、
(4)MgO分離剤を塗布して乾燥させるステップと、
(5)焼鈍:N2+H2の雰囲気において、1100℃以上の焼鈍温度で二次再結晶を完成し、その後、H2含有量が90%より高い還元性雰囲気で、1150℃以上の温度で鋼板を少なくとも20時間均一に加熱するステップと、
(6)酸液を用いて焼鈍後の鋼板表面に残留された未反応成分を除去し、その後、リン酸塩とコロイド状二酸化珪素を含む絶縁コーティングを塗布して熱延伸平坦化焼鈍を行い、製品鋼板を得るステップと、を用いて製造される。
(1)表1中の各化学元素質量%を含有する鋼スラブを1050〜1215℃で再加熱し、その後、1050〜1150℃で熱間圧延し、焼鈍して、酸洗を行い、すぐ後で、シングルスタンド圧延機を用いて冷間圧延し、0.285mmの冷間圧延鋼板を得た。
(2)露点が40〜65℃で湿っぽい窒素ガス及び水素ガスの混合雰囲気で、820〜850℃の焼鈍温度で冷間圧延が行われた鋼板に対して脱炭焼鈍を行い、脱炭焼鈍後の吹付け対象物の鋼板表面の総酸素含有量が700ppm未満、C元素含有量が50ppm未満であるように制御して、0.285mmの脱炭焼鈍鋼板を得た。
(3)高珪素合金粒子を完全に固態の状態で、500-900m/sの速度で、脱炭焼鈍が行われた吹付け対象物の鋼板の表面に衝突させるように、内表面が円錐形であるラバールノズルを用いて高珪素合金粒子と加熱された作動ガス(例えば、窒素ガス)を吹付け対象物の鋼板表面に噴射し、ここで、高珪素合金粒子中のSi元素の含有量が37.9wt%であり、高珪素合金粒子の粒径が20μmであり、ノズル出口の高珪素合金粒子の温度が80-500℃であるように制御し、ノズルの出口と吹付け対象物の鋼板表面との間の距離が10-60mmであるように制御し、最終的に得られた高珪素方向性電磁鋼板中のSi含有量が6.5 wt%であることが望ましい。
(1)表1中の各化学元素質量%を含有する鋼スラブを1050〜1215℃で再加熱し、その後、1050〜1150℃で熱間圧延し、焼鈍して、酸洗を行い、すぐ後で、シングルスタンド圧延機を用いて冷間圧延し、目標厚みの鋼板を得た。
(2)露点が40〜65℃で湿っぽい窒素ガス及び水素ガスの混合雰囲気で、820〜850℃の焼鈍温度で冷間圧延が行われた鋼板に対して脱炭焼鈍を行い、脱炭焼鈍後の吹付け対象物の鋼板表面の総酸素含有量が700ppm未満、C元素含有量が50ppm未満であるように制御する。
(3)高珪素合金粒子を完全に固態の状態で、650m/sの速度で、脱炭焼鈍が行われた吹付け対象物の鋼板の表面に衝突させるように、内表面が円錐形であるラバールノズルを用いて高珪素合金粒子と加熱された作動ガス(例えば、窒素ガス)を吹付け対象物の鋼板表面に噴射し、高珪素合金粒子中のSi元素の含有量が37.9wt%であり、高珪素合金粒子の粒径が20μmであり、ノズル出口の高珪素合金粒子の温度が250℃であるように制御し、ノズルの出口と吹付け対象物の鋼板表面との間の距離が25mmであるように制御する。
(4)MgO分離剤を塗布して乾燥させる。
(5)焼鈍:N2+H2の雰囲気で、1100℃以上の焼鈍温度で二次再結晶を完成し、その後、H2含有量が90%より高い還元性雰囲気で、1150℃以上の温度で鋼板を少なくとも20時間均一に加熱する。
(6)酸液を用いて焼鈍後の鋼板表面に残留された未反応成分を除去し、その後、リン酸塩とコロイド状二酸化珪素を含む絶縁コーティングを塗布して熱延伸平坦化焼鈍を行い、製品鋼板を得た。
Claims (15)
- 珪素の含有量が4wt%より高い高珪素方向性電磁鋼板の製造方法において、
(1)冷間圧延が行われた鋼板に対して脱炭焼鈍を行うステップと、
(2)高珪素合金粒子を完全に固態の状態で、脱炭焼鈍が行われた吹付け対象物の鋼板の表面に高速で衝突させて、吹付け対象物の鋼板表面に高珪素合金コーティングを形成するステップと、
(3)分離剤を塗布して乾燥させるステップと、
(4)焼鈍を行うステップと、
を含むことを特徴とする高珪素方向性電磁鋼板の製造方法。 - 前記ステップ(2)では、前記高珪素合金粒子中のSi元素の含有量が10〜50wt%であることを特徴とする請求項1に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、前記高珪素合金粒子の粒径が1-80μmであることを特徴とする請求項1に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、高珪素合金粒子を完全に固態の状態で500-900m/sの速度で脱炭焼鈍が行われた吹付け対象物の鋼板の表面に衝突させることを特徴とする請求項1に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、作動ガスの噴流によって前記高珪素合金粒子を駆動し、脱炭焼鈍が行われた吹付け対象物の鋼板の表面に衝突させることを特徴とする請求項1に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、前記作動ガスが窒素ガス、ヘリウムガス又は窒素ガス+ヘリウムガスであることを特徴とする請求項5に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、高珪素合金粒子を完全に固態の状態で脱炭焼鈍が行われた吹付け対象物の鋼板の表面に高速で衝突させるように、ノズルを用いて前記高珪素合金粒子と作動ガスを吹付け対象物の鋼板表面に噴射することを特徴とする請求項5に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、ノズル出口の高珪素合金粒子の温度が80〜500℃になるように制御することを特徴とする請求項7に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、まず、作動ガスを200-700℃に加熱し、その後、前記ノズルに送り込むことを特徴とする請求項7に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、前記ノズルがラバールノズルであることを特徴とする請求項7に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、前記ノズルの出口と吹付け対象物の鋼板表面との間の距離が10-60mmであることを特徴とする請求項7に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(2)では、吹付け対象物の鋼板の片面表面又は両面表面に高珪素合金コーティングを形成し、前記高珪素合金コーティングの厚みは次の式を満たし、
Tc/Ts≧(x1-x2)/(x3-x1)
ここで、Tcは、高珪素合金コーティングの厚みで、単位パラメータがμmであり、そのうち、鋼板の両面表面にともに高珪素合金コーティングが形成されている場合、前記高珪素合金コーティングの厚みは、鋼板両面のコーティング厚みの和であり、Tsは、脱炭焼鈍後の吹付け対象物の鋼板の厚みで、単位パラメータがμmであり、x1は、高珪素方向性電磁鋼板の目標珪素含有量で、その単位パラメータがwt%であり、x2は、吹付け対象物の鋼板の初期珪素含有量で、その単位パラメータがwt%であり、x3は、前記高珪素合金粒子中の珪素含有量で、その単位パラメータがwt%である
ことを特徴とする請求項1に記載の高珪素方向性電磁鋼板の製造方法。 - 前記ステップ(1)では、脱炭焼鈍後の吹付け対象物の鋼板表面の総酸素含有量が700ppm未満、C元素含有量が50ppm未満であるように制御し、脱炭焼鈍ステップの露点範囲が40〜65℃であるように制御することを特徴とする請求項1に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(4)では、N2+H2の雰囲気において、1100℃以上の焼鈍温度で二次再結晶を完成し、その後、H2含有量が90%より高い還元性雰囲気において、1150℃以上の温度で鋼板を少なくとも20時間均一に加熱し、Si元素の均一な拡散を実現することを特徴とする請求項1に記載の高珪素方向性電磁鋼板の製造方法。
- 前記ステップ(4)の後、絶縁コーティングを塗布して熱延伸平坦化焼鈍を行うステップをさらに含むことを特徴とする請求項1に記載の高珪素方向性電磁鋼板の製造方法。
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