JP2020510135A - リッジング性および表面品質に優れたフェライト系ステンレス鋼およびその製造方法 - Google Patents
リッジング性および表面品質に優れたフェライト系ステンレス鋼およびその製造方法 Download PDFInfo
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—Hot rolling
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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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
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- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the 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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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
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Abstract
Description
下記表1の組成を有する溶鋼を連続鋳造してスラブを製造し、スラブを再加熱して熱間圧延後に初期厚さ3〜7mmの熱延板を熱延焼鈍熱処理前に1次冷間圧延を実施した。
Claims (13)
- 重量%で、C:0.005〜0.1%、Si:0.01〜2.0%、Mn:0.01〜1.5%、P:0.05%以下、S:0.005%以下、Cr:10〜30%、N:0.005〜0.1%、Al:0.005〜0.2%、残りのFeおよびその他不可避な不純物を含み、
下記式(1)で表されるγmaxが20%以上50%未満である、リッジング性および表面品質に優れたフェライト系ステンレス鋼:
(1)420×C+470×N+10×Mn+180−11.5×Cr−11.5×Si−52.0×Al
ここで、C、N、Mn、Cr、Si、Alは、各元素の含量(重量%)を意味する。 - 前記ステンレス鋼は、表面の微細溝の面積率が2.0%以下である、請求項1に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼。
- 前記ステンレス鋼は、リッジング高さが12μm以下である、請求項1に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼。
- 前記ステンレス鋼は、r−bar値が1.2以上である、請求項1に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼。
- 重量%で、C:0.005〜0.1%、Si:0.01〜2.0%、Mn:0.01〜1.5%、P:0.05%以下、S:0.005%以下、Cr:10〜30%、N:0.005〜0.1%、Al:0.005〜0.2%、残りのFeおよびその他不可避な不純物を含み、下記式(1)で表されるγmaxが20%以上50%未満を満たすスラブを製造する段階と、
前記スラブを再加熱して熱間圧延する段階と、
前記熱間圧延された熱延板を巻き取る段階と、
前記巻き取られた熱延板を熱延焼鈍熱処理する前に、冷間圧延する段階と,を含むリッジング性および表面品質に優れたフェライト系ステンレス鋼の製造方法:
(1)420×C+470×N+10×Mn+180−11.5×Cr−11.5×Si−52.0×Al
ここで、C、N、Mn、Cr、Si、Alは、各元素の含量(重量%)を意味する。 - 前記熱延板を巻き取る段階での巻取温度は、750℃以上である、請求項5に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼の製造方法。
- 前記冷間圧延する段階は、非対称冷間圧延で実施する、請求項5に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼の製造方法。
- 前記冷間圧延または前記非対称冷間圧延は、30%以上の圧下率で実施する、請求項5または7に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼の製造方法。
- 前記非対称冷間圧延は、上下圧延ロールの速度比(Vh/Vl)が1.25以上であり、圧延形状因子(l/d)が1.7以上である圧延条件で実施する、請求項7に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼の製造方法。
ここで、
Vh:速いロール速度
Vl:遅いロール速度
l:圧延ロールバイト内のロールと板材の接触弧を投影した長さ
d:板材の平均厚さd=(h0+h)/2
r:圧延ロールの半径
h0:板材の初期厚さ
h:板材の最終厚さ - 前記非対称冷間圧延後、熱延焼鈍、2次冷間圧延および冷延焼鈍を実施して製造されたステンレス鋼のリッジング高さが10μm以下である、請求項9に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼の製造方法。
- 前記冷間圧延する段階後に、熱延焼鈍熱処理する段階をさらに含む、請求項5に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼の製造方法。
- 前記熱延焼鈍熱処理は、550〜950℃の温度範囲で60分以内で実施する、請求項11に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼の製造方法。
- 前記熱延焼鈍熱処理後に、熱延焼鈍材の断面の厚さ中心部の組織の平均縦横比が4.0以下である、請求項11に記載のリッジング性および表面品質に優れたフェライト系ステンレス鋼の製造方法。
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KR1020160169696A KR101921595B1 (ko) | 2016-12-13 | 2016-12-13 | 리징성 및 표면품질이 우수한 페라이트계 스테인리스강 및 그 제조방법 |
KR10-2016-0169696 | 2016-12-13 | ||
PCT/KR2017/007099 WO2018110785A1 (ko) | 2016-12-13 | 2017-07-04 | 리징성 및 표면품질이 우수한 페라이트계 스테인리스강 및 그 제조방법 |
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CN115917029A (zh) * | 2020-10-23 | 2023-04-04 | 日铁不锈钢株式会社 | 铁素体系不锈钢及铁素体系不锈钢的制造方法 |
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KR101423823B1 (ko) * | 2012-06-28 | 2014-07-25 | 주식회사 포스코 | 내식성 및 내리징성이 향상된 저크롬 페라이트계 스테인리스강 |
KR101522077B1 (ko) | 2012-12-20 | 2015-05-20 | 주식회사 포스코 | 내리징성이 우수한 페라이트계 스테인리스강 제조 방법 |
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2016
- 2016-12-13 KR KR1020160169696A patent/KR101921595B1/ko active IP Right Grant
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2017
- 2017-07-04 CN CN201780077285.0A patent/CN110073022B/zh active Active
- 2017-07-04 US US16/468,883 patent/US20190316237A1/en not_active Abandoned
- 2017-07-04 JP JP2019531659A patent/JP7116064B2/ja active Active
- 2017-07-04 EP EP17881883.7A patent/EP3556888A1/en active Pending
- 2017-07-04 WO PCT/KR2017/007099 patent/WO2018110785A1/ko unknown
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JPS6332852B2 (ja) * | 1980-10-20 | 1988-07-01 | Nippon Steel Corp | |
JP3128487B2 (ja) * | 1995-10-04 | 2001-01-29 | 新日本製鐵株式会社 | リジング特性の良好なフェライト系ステンレス鋼板の製造方法 |
JPH09217124A (ja) * | 1996-02-15 | 1997-08-19 | Nippon Steel Corp | 耐ローピング性に優れるフェライト系ステンレス鋼板の製造方法 |
JP2003073741A (ja) * | 2001-08-31 | 2003-03-12 | Nisshin Steel Co Ltd | 加工性に優れるフェライト系ステンレス鋼板の製造方法 |
KR100771832B1 (ko) * | 2001-12-19 | 2007-10-30 | 주식회사 포스코 | 리징성이 향상된 페라이트계 스테인레스강의 제조방법 |
JP2006328525A (ja) * | 2005-01-24 | 2006-12-07 | Nippon Steel & Sumikin Stainless Steel Corp | 成形時の面内異方性が小さく耐リジング性及び耐肌荒れ性に優れた低炭素低窒素フェライト系ステンレス鋼薄板及びその製造方法 |
JP2006328524A (ja) * | 2005-01-24 | 2006-12-07 | Nippon Steel & Sumikin Stainless Steel Corp | 成形時の面内異方性が小さく耐リジング性及び耐肌荒れ性に優れたフェライト系ステンレス鋼薄板及びその製造方法 |
KR20080061863A (ko) * | 2006-12-28 | 2008-07-03 | 주식회사 포스코 | 리징 특성이 개선된 페라이트계 스테인리스강 제조방법 |
Also Published As
Publication number | Publication date |
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CN110073022B (zh) | 2021-06-29 |
US20190316237A1 (en) | 2019-10-17 |
KR101921595B1 (ko) | 2018-11-26 |
KR20180068089A (ko) | 2018-06-21 |
CN110073022A (zh) | 2019-07-30 |
EP3556888A4 (en) | 2019-10-23 |
JP7116064B2 (ja) | 2022-08-09 |
EP3556888A1 (en) | 2019-10-23 |
WO2018110785A1 (ko) | 2018-06-21 |
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