JP5849667B2 - 低カルシウム鋼の溶製方法 - Google Patents
低カルシウム鋼の溶製方法 Download PDFInfo
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- JP5849667B2 JP5849667B2 JP2011268636A JP2011268636A JP5849667B2 JP 5849667 B2 JP5849667 B2 JP 5849667B2 JP 2011268636 A JP2011268636 A JP 2011268636A JP 2011268636 A JP2011268636 A JP 2011268636A JP 5849667 B2 JP5849667 B2 JP 5849667B2
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- calcium
- molten steel
- metal
- steel
- iron
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- 229910000831 Steel Inorganic materials 0.000 title claims description 166
- 239000010959 steel Substances 0.000 title claims description 166
- 239000011575 calcium Substances 0.000 title claims description 152
- 229910052791 calcium Inorganic materials 0.000 title claims description 151
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims description 148
- 238000000034 method Methods 0.000 title claims description 14
- 238000002844 melting Methods 0.000 title claims description 10
- 230000008018 melting Effects 0.000 title claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 116
- 239000002184 metal Substances 0.000 claims description 71
- 229910052751 metal Inorganic materials 0.000 claims description 63
- 229910052742 iron Inorganic materials 0.000 claims description 58
- 229910045601 alloy Inorganic materials 0.000 claims description 51
- 239000000956 alloy Substances 0.000 claims description 51
- 238000010992 reflux Methods 0.000 claims description 31
- 238000007670 refining Methods 0.000 claims description 28
- 238000009849 vacuum degassing Methods 0.000 claims description 24
- 150000002739 metals Chemical class 0.000 claims description 16
- 235000000396 iron Nutrition 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 5
- 238000005275 alloying Methods 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 2
- 230000023556 desulfurization Effects 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 19
- 238000007872 degassing Methods 0.000 description 14
- 229910000640 Fe alloy Inorganic materials 0.000 description 11
- 239000011572 manganese Substances 0.000 description 10
- 229910017082 Fe-Si Inorganic materials 0.000 description 9
- 229910017133 Fe—Si Inorganic materials 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 229910001092 metal group alloy Inorganic materials 0.000 description 8
- 239000000538 analytical sample Substances 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000006356 dehydrogenation reaction Methods 0.000 description 3
- 238000006392 deoxygenation reaction Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005262 decarbonization Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Description
[1]カルシウムの含有量が0.0005質量%以下である低カルシウム鋼の溶製方法であって、RH真空脱ガス装置の真空槽と該真空槽直下の取鍋との間を環流しているAl脱酸後の溶鋼に、成分調整用の金属または合金鉄を前記真空槽にて添加して溶鋼の成分を調整するにあたり、成分調整用の金属または合金鉄の最後の添加時点からの必要環流時間t0を、(1)式の目標カルシウム濃度CTを溶製対象の低カルシウム鋼のカルシウム濃度の上限値とする下記の(1)式によって求め、求めた必要環流時間t0を確保し、且つ、必要環流時間t0よりも60秒を越えない範囲内で溶鋼を環流し、その後、精錬を終了することを特徴とする、低カルシウム鋼の溶製方法。
2 取鍋
3 溶鋼
4 スラグ
5 真空槽
6 上部槽
7 下部槽
8 上昇側浸漬管
9 下降側浸漬管
10 環流用ガス吹込管
11 ダクト
12 原料投入口
Claims (1)
- カルシウムの含有量が0.0005質量%以下である低カルシウム鋼の溶製方法であって、RH真空脱ガス装置の真空槽と該真空槽直下の取鍋との間を環流しているAl脱酸後の溶鋼に、成分調整用の金属または合金鉄を前記真空槽にて添加して溶鋼の成分を調整するにあたり、成分調整用の金属または合金鉄の最後の添加時点からの必要環流時間t0を、(1)式の目標カルシウム濃度CTを溶製対象の低カルシウム鋼のカルシウム濃度の上限値とする下記の(1)式によって求め、求めた必要環流時間t0を確保し、且つ、必要環流時間t0よりも60秒を越えない範囲内で溶鋼を環流し、その後、精錬を終了することを特徴とする、低カルシウム鋼の溶製方法。
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JP2011268636A JP5849667B2 (ja) | 2011-12-08 | 2011-12-08 | 低カルシウム鋼の溶製方法 |
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JP2011268636A JP5849667B2 (ja) | 2011-12-08 | 2011-12-08 | 低カルシウム鋼の溶製方法 |
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JP2013119656A JP2013119656A (ja) | 2013-06-17 |
JP5849667B2 true JP5849667B2 (ja) | 2016-02-03 |
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CN105200195B (zh) * | 2015-10-26 | 2017-05-31 | 江苏省沙钢钢铁研究院有限公司 | 一种提高锑元素收得率的rh真空精炼方法 |
CN110042202B (zh) * | 2019-04-22 | 2021-01-26 | 南京钢铁股份有限公司 | 一种rh精炼炉真空过程钙处理方法 |
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JP2001105101A (ja) * | 1999-10-05 | 2001-04-17 | Nippon Steel Corp | 薄板用鋼板の溶製方法 |
JP3845554B2 (ja) * | 2001-06-07 | 2006-11-15 | 株式会社神戸製鋼所 | 曲げ加工性に優れた超高強度冷延鋼板 |
JP5277556B2 (ja) * | 2007-03-29 | 2013-08-28 | Jfeスチール株式会社 | 含Ti極低炭素鋼の溶製方法及び含Ti極低炭素鋼鋳片の製造方法 |
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