JP4753558B2 - 方向性電磁鋼用熱間圧延鋼帯の圧延方法及び方向性電磁鋼板の製造方法 - Google Patents
方向性電磁鋼用熱間圧延鋼帯の圧延方法及び方向性電磁鋼板の製造方法 Download PDFInfo
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- 238000005096 rolling process Methods 0.000 title claims description 86
- 229910000831 Steel Inorganic materials 0.000 title claims description 47
- 239000010959 steel Substances 0.000 title claims description 47
- 238000000034 method Methods 0.000 title claims description 24
- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 title claims description 20
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- 239000007858 starting material Substances 0.000 claims description 13
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 10
- 238000005097 cold rolling Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
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- 230000001590 oxidative effect Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000005098 hot rolling Methods 0.000 description 10
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- 239000012535 impurity Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 229910052839 forsterite Inorganic materials 0.000 description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 3
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
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- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Metal Rolling (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Description
(1)粗圧延に供するスラブ幅方向側面の表層5mmまでのC含有量(Cs)に対する該スラブの中心層のC含有量(Cc)の比を(Cs/Cc)としたとき、あらかじめ求められた前記比(Cs/Cc)と出発素材成分及びスラブ加熱条件との関係に基づき、前記比(Cs/Cc)が0.40以上0.86以下となるよう、前記出発素材に対するスラブ加熱条件を調整すること
(2)粗圧延後仕上圧延開始までにエッジャーミルにより圧下量5〜60mmのシートバー幅圧下を行うこと
(3)仕上圧延前のシートバー側面温度を1150〜1250℃の範囲とすること
以下、上記条件について順次説明する。
本発明の出発素材であるスラブの基本組成は、C:0.01〜0.08%、Si:2.5〜4.1%を含有するものであり、必要に応じてMn:0.03〜0.10%、S及びSeの1種または2種(合計量):0.005〜0.1%、sol.Al:0.01〜0.05%、N:0.004〜0.012%を含有し、残部は不可避的不純物を除きFeからなる。
上記出発素材であるスラブは、プッシャー式、ウォーキングビーム式のスラブ加熱炉を用い、さらに必要に応じてスラブ加熱炉に引き続いて設けられた誘導加熱炉を用いて高温加熱される。この際の加熱温度は、1250℃より低いとインヒビター成分の固溶が不十分となり後続の圧延過程で十分な析出分散相を形成することができなくなり、1450℃より高いと膨大なスケールの発生によって歩留低下及び加熱炉の寿命低下を招くので1250〜1450℃とする。
Claims (5)
- 出発素材の組成成分が質量比で、C:0.01〜0.08%、Si:2.5〜4.1%を含有する方向性電磁鋼用スラブに対して1250〜1450℃のスラブ加熱を施した後、粗圧延及び圧延開始温度を950〜1150℃とする仕上圧延を行う方向性電磁鋼用熱間圧延鋼帯の圧延方法であって、
粗圧延に供するスラブ幅方向側面の表層5mmまでのC含有量(Cs)に対する該スラブの中心層のC含有量(Cc)の比を(Cs/Cc)としたとき、あらかじめ求められた前記比(Cs/Cc)と前記出発素材成分及びスラブ加熱条件との関係に基づき、前記比(Cs/Cc)が0.40以上0.86以下となるよう、前記出発素材に対するスラブ加熱条件を調整し、
前記粗圧延後仕上圧延開始までにエッジャーミルにより圧下量5〜60mmのシートバー幅圧下を行い、かつ、
前記仕上圧延前の仕上圧延前シートバー側面温度を1150〜1250℃とすることを特徴とする方向性電磁鋼用熱間圧延鋼帯の圧延方法。 - スラブ加熱条件の調整が、ガス加熱炉の炉内酸素濃度の調整によって行われることを特徴とする請求項1記載の方向性電磁鋼用熱間圧延鋼帯の圧延方法。
- ガス加熱炉の炉内酸素濃度を、容積比で0.1〜5.0%とすることを特徴とする請求項2記載の方向性電磁鋼用熱間圧延鋼帯の圧延方法。
- ガス加熱に続いて非酸化性雰囲気の誘導加熱が行われることを特徴とする請求項2又は3記載の方向性電磁鋼用熱間圧延鋼帯の圧延方法。
- 請求項1〜4のいずれかに記載の方向性電磁鋼用熱間圧延鋼帯の圧延方法によって得た方向性電磁鋼用熱間圧延鋼帯に対して、冷間圧延、脱炭焼鈍および最終仕上焼鈍を行うことを特徴とする方向性電磁鋼板の製造方法。
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CN114737119B (zh) * | 2022-04-02 | 2023-04-11 | 福建三宝钢铁有限公司 | 一种低成本高质量sphc板坯及其制备方法 |
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