JP4290522B2 - 薄帯鋳片および薄帯鋳片製造方法 - Google Patents
薄帯鋳片および薄帯鋳片製造方法 Download PDFInfo
- Publication number
- JP4290522B2 JP4290522B2 JP2003360721A JP2003360721A JP4290522B2 JP 4290522 B2 JP4290522 B2 JP 4290522B2 JP 2003360721 A JP2003360721 A JP 2003360721A JP 2003360721 A JP2003360721 A JP 2003360721A JP 4290522 B2 JP4290522 B2 JP 4290522B2
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- Prior art keywords
- molten steel
- gas
- drum
- shell
- nitrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004519 manufacturing process Methods 0.000 title claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 77
- 229910000831 Steel Inorganic materials 0.000 claims description 64
- 239000010959 steel Substances 0.000 claims description 64
- 238000001816 cooling Methods 0.000 claims description 33
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 27
- 229910052757 nitrogen Inorganic materials 0.000 claims description 25
- 238000005266 casting Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000009749 continuous casting Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 230000003746 surface roughness Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 48
- 238000010521 absorption reaction Methods 0.000 description 9
- 230000004907 flux Effects 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 9
- 230000007423 decrease Effects 0.000 description 8
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 238000003825 pressing Methods 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 230000035515 penetration Effects 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
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- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Description
(2)前記湯溜り部内の溶鋼の窒素濃度を420ppm以上とすることを特徴とする前記(1)記載の薄帯鋳片製造方法。
(3)前記溶鋼に窒素ガスの吹込み処理を行うことを特徴とする前記(1)または(2)記載の薄帯鋳片製造方法。
[実施例]
本発明例では、溶鋼の窒素濃度を350ppm以上とした結果、鋳造時間が精練時間よりも僅かに長い結果となり、連々鋳の鍋待ち時間(次鍋到着〜次鍋鋳造開始が5 〜10分であったので、鋳造時間短縮による連々鋳の中断、及び溶鋼温度低下による鋳片表面欠陥の発生もなかった。
これに対して溶鋼の窒素濃度が256ppmであった比較例では、鋳造時間が所定時間よりも大幅に短くなり、精練が鋳造に間に合わない結果となり、連々鋳を中断する事態が発生した。
2…サイド堰
3…湯溜り部
4…タンディッシュ
5…ノズル
6…シールチャンバー
m…溶鋼
s…凝固シェル
kp…ドラムキス点
t…薄帯鋳片
g…ガスギャップ
u1…シェル凝固収縮によるシェル浮き上げ方向
u2…ガス膨張によるシェル浮き上げ方向
d…ガス吸収によるシェル押付け方向
Claims (3)
- 一対の冷却ドラム間に形成された湯溜り部にステンレス鋼の溶鋼を連続的に供給して薄帯鋳片を製造する連続鋳造方法において、前記冷却ドラムは、その周面に、平均表面粗さ80μm以下の窪みが形成されており、前記湯溜り部を、濃度が80%以上の窒素ガスによりシールするとともに、該湯溜り部内の溶鋼の窒素濃度を350ppm以上とすることを特徴とする薄帯鋳片製造方法。
- 前記湯溜り部内の溶鋼の窒素濃度を420ppm以上とすることを特徴とする請求項1記載の薄帯鋳片製造方法。
- 前記溶鋼に窒素ガスの吹込み処理を行うことを特徴とする請求項1または2記載の薄帯鋳片製造方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003360721A JP4290522B2 (ja) | 2003-10-21 | 2003-10-21 | 薄帯鋳片および薄帯鋳片製造方法 |
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JP2003360721A JP4290522B2 (ja) | 2003-10-21 | 2003-10-21 | 薄帯鋳片および薄帯鋳片製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005125336A JP2005125336A (ja) | 2005-05-19 |
JP4290522B2 true JP4290522B2 (ja) | 2009-07-08 |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101239589B1 (ko) | 2010-12-27 | 2013-03-05 | 주식회사 포스코 | 고내식 마르텐사이트 스테인리스강 및 그 제조방법 |
CN104923793B (zh) * | 2015-06-16 | 2017-01-25 | 昆明理工大学 | 一种连续轧挤装置 |
CN109338236B (zh) * | 2018-04-18 | 2021-10-29 | 江苏沙钢集团有限公司 | 一种基于薄带铸轧的易焊接碳素结构钢及其制造方法 |
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- 2003-10-21 JP JP2003360721A patent/JP4290522B2/ja not_active Expired - Lifetime
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