JP2005271069A - 溶鋼の連続鋳造方法 - Google Patents
溶鋼の連続鋳造方法 Download PDFInfo
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- JP2005271069A JP2005271069A JP2004091828A JP2004091828A JP2005271069A JP 2005271069 A JP2005271069 A JP 2005271069A JP 2004091828 A JP2004091828 A JP 2004091828A JP 2004091828 A JP2004091828 A JP 2004091828A JP 2005271069 A JP2005271069 A JP 2005271069A
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- molten steel
- mold
- powder
- hydrogen
- mold powder
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 97
- 239000010959 steel Substances 0.000 title claims abstract description 97
- 238000009749 continuous casting Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 88
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000001257 hydrogen Substances 0.000 claims abstract description 58
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 58
- 238000005266 casting Methods 0.000 claims abstract description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 238000010521 absorption reaction Methods 0.000 claims description 30
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 16
- 238000000605 extraction Methods 0.000 abstract description 4
- 238000007872 degassing Methods 0.000 description 7
- 230000002950 deficient Effects 0.000 description 5
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
【解決手段】 本発明の溶鋼の連続鋳造方法では、鋳型1内の溶鋼5に水素吸収能を持つモールドパウダーを添加し、該モールドパウダーに鋳型内溶鋼5に含まれる水素を吸収させるようにしたので、水素起因の抜熱不良を防止することができ、操業を安定させることができる。また、モールドパウダーを、6〜20wt%のアルミナを含有しているものとし、さらにモールドパウダーの塩基度が1.3〜2.0の範囲内とすることによって、水素分吸収能を向上させることができ、より確実に水素起因の抜熱不良を防止して操業を安定させることができる。
【選択図】 図1
Description
Q≧(H−6.56)×32.5/A (I)
5 溶鋼
6 凝固シェル
7 溶融パウダー
8 粉パウダー
Claims (6)
- 鋳型内の溶鋼の表面に水素吸収能を持つモールドパウダーを添加し、該モールドパウダーに鋳型内溶鋼に含まれる水素を水蒸気として吸収させるようにしたことを特徴とする溶鋼の連続鋳造方法。
- 前記モールドパウダーが6〜20wt%のアルミナを含有していることを特徴とする請求項1に記載の溶鋼の連続鋳造方法。
- 前記モールドパウダーの塩基度が1.3〜2.0の範囲内であることを特徴とする請求項1または2に記載の溶鋼の連続鋳造方法。
- 前記モールドパウダーの水蒸気吸収能が450ppm以上であることを特徴とする請求項1乃至3の何れかに記載の溶鋼の連続鋳造方法。
- 溶鋼精錬において前記溶鋼へ投入する副原料及び合金からのインプット水素濃度が7ppm以上、または前記溶鋼中のマンガン及びシリコン濃度が合わせて2.1%以上であることを特徴とする請求項1乃至4の何れかに記載の溶鋼の連続鋳造方法。
- 前記溶鋼中の水素濃度が7ppm以上であって、その水素濃度をH(ppm)、モールドパウダーの水蒸気吸収能をA(ppm)とすると、単位面積当たりの鋳片に対するモールドパウダー添加量Q(kg/m2)は、下式(I)に示される範囲内となることを特徴とする請求項1乃至5の何れかに記載の溶鋼の連続鋳造方法。
Q≧(H−6.56)×32.5/A (I)
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JP2004091828A JP4102323B2 (ja) | 2004-03-26 | 2004-03-26 | 溶鋼の連続鋳造方法 |
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Publications (2)
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JP2005271069A true JP2005271069A (ja) | 2005-10-06 |
JP4102323B2 JP4102323B2 (ja) | 2008-06-18 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007270247A (ja) * | 2006-03-31 | 2007-10-18 | Nippon Steel Corp | 連続鋳造用パウダーの製造方法及び鋼の連続鋳造方法 |
JP2009045666A (ja) * | 2007-08-22 | 2009-03-05 | Sumitomo Metal Ind Ltd | 鋼の連続鋳造用モールドフラックスおよびそれを用いた連続鋳造方法 |
KR101505150B1 (ko) | 2013-04-30 | 2015-03-23 | 현대제철 주식회사 | 코일제조방법 |
JP2017001079A (ja) * | 2015-06-15 | 2017-01-05 | Jfeスチール株式会社 | 鋼の連続鋳造方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6528618B2 (ja) * | 2015-09-08 | 2019-06-12 | 日本製鉄株式会社 | 鋼の連続鋳造用パウダーおよび鋼の連続鋳造方法 |
-
2004
- 2004-03-26 JP JP2004091828A patent/JP4102323B2/ja not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007270247A (ja) * | 2006-03-31 | 2007-10-18 | Nippon Steel Corp | 連続鋳造用パウダーの製造方法及び鋼の連続鋳造方法 |
JP2009045666A (ja) * | 2007-08-22 | 2009-03-05 | Sumitomo Metal Ind Ltd | 鋼の連続鋳造用モールドフラックスおよびそれを用いた連続鋳造方法 |
KR101505150B1 (ko) | 2013-04-30 | 2015-03-23 | 현대제철 주식회사 | 코일제조방법 |
JP2017001079A (ja) * | 2015-06-15 | 2017-01-05 | Jfeスチール株式会社 | 鋼の連続鋳造方法 |
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