JP4222148B2 - 鋼の連続鋳造方法 - Google Patents
鋼の連続鋳造方法 Download PDFInfo
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- JP4222148B2 JP4222148B2 JP2003288991A JP2003288991A JP4222148B2 JP 4222148 B2 JP4222148 B2 JP 4222148B2 JP 2003288991 A JP2003288991 A JP 2003288991A JP 2003288991 A JP2003288991 A JP 2003288991A JP 4222148 B2 JP4222148 B2 JP 4222148B2
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- slab
- roundness
- continuous casting
- round
- mold
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Description
K=aAl×aN・・・(2)
aAl:溶鋼中Alの活量、aN:溶鋼中のNの活量
すなわち、本発明によれば、表面割れを助長するAlN の粒界への析出量を減少させることで割れを防止するのである。 AlNの平衡反応式は(1) 式で表され、平衡定数Kは(2) 式で表される。つまり、溶鋼中のAlとNを低下させることでAlN を低減できる。ここで、管理指標を簡単にするために、溶鋼中のAl濃度(mass%:[Al])とN濃度(mass%:[N]) の積を採用した。
Mn: 0.3 〜1.5 %
Si: 0.15〜0.35%
P 、S: 0.03%以下
N: 0.015 %以下
Al: 0.05%以下
その他、必要に応じて、Cr、Ni、Mo、Nb、V等の合金元素を適宜配合することができる。
Claims (2)
- 炭素鋼および低合金鋼の丸鋳片を湾曲型または垂直曲型連続鋳造機で製造するにあたり、連続鋳造鋳型に注入される溶鋼成分の[Al%]および[N%]を[Al%]×[N%]≦2×10−4に調整するとともに、鋳造速度を1.4m/min以下として鋳造し、鋳型から引き抜かれた丸鋳片を、二次冷却比水量0.4L/kg以上、1.0 L/kg未満で二次冷却することを特徴とする連続鋳造方法。
- 前記丸鋳片の鋳片径が300mm以上である請求項1記載の連続鋳造方法。
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JP2003288991A JP4222148B2 (ja) | 2003-08-07 | 2003-08-07 | 鋼の連続鋳造方法 |
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JP2003288991A JP4222148B2 (ja) | 2003-08-07 | 2003-08-07 | 鋼の連続鋳造方法 |
Publications (2)
Publication Number | Publication Date |
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JP2005052881A JP2005052881A (ja) | 2005-03-03 |
JP4222148B2 true JP4222148B2 (ja) | 2009-02-12 |
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JP2003288991A Expired - Fee Related JP4222148B2 (ja) | 2003-08-07 | 2003-08-07 | 鋼の連続鋳造方法 |
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Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4887818B2 (ja) * | 2006-02-15 | 2012-02-29 | Jfeスチール株式会社 | 連続鋳造スラブの製造方法並びに高張力熱延鋼板、高張力冷延鋼板及び高張力亜鉛めっき鋼板の製造方法 |
EP2263816A1 (de) * | 2009-06-03 | 2010-12-22 | Concast Ag | Verfahren und Einrichtung zum Führen und Richten des Strangs in einer Stranggiessanlage für grossformatige Rundprofile |
EP2441541A4 (en) * | 2009-07-07 | 2017-03-15 | Nippon Steel & Sumitomo Metal Corporation | Mold flux for continuous casting of steel and method for continuous casting of steel using same |
JP5299702B2 (ja) * | 2009-12-28 | 2013-09-25 | 新日鐵住金株式会社 | Cr含有合金鋼製丸鋳片の連続鋳造方法 |
JP5370929B2 (ja) * | 2010-01-22 | 2013-12-18 | 新日鐵住金株式会社 | 鋼の連続鋳造用モールドフラックス |
CN106180611A (zh) * | 2016-07-08 | 2016-12-07 | 江苏联峰能源装备有限公司 | 适用于加工环型锻件的连铸圆坯生产工艺 |
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2003
- 2003-08-07 JP JP2003288991A patent/JP4222148B2/ja not_active Expired - Fee Related
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