JP2017145455A - 窒素含有鋼の製造方法 - Google Patents
窒素含有鋼の製造方法 Download PDFInfo
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- JP2017145455A JP2017145455A JP2016027944A JP2016027944A JP2017145455A JP 2017145455 A JP2017145455 A JP 2017145455A JP 2016027944 A JP2016027944 A JP 2016027944A JP 2016027944 A JP2016027944 A JP 2016027944A JP 2017145455 A JP2017145455 A JP 2017145455A
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- Prior art keywords
- nitrogen
- molten steel
- steel
- immersion nozzle
- gas
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- 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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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 92
- 239000010959 steel Substances 0.000 title claims abstract description 92
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 101
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 37
- 238000007654 immersion Methods 0.000 claims abstract description 32
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 30
- 239000000956 alloy Substances 0.000 claims abstract description 30
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 27
- 238000007664 blowing Methods 0.000 claims description 30
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 description 13
- 238000005121 nitriding Methods 0.000 description 11
- 238000003756 stirring Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 229910001337 iron nitride Inorganic materials 0.000 description 2
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- RRZKHZBOZDIQJG-UHFFFAOYSA-N azane;manganese Chemical compound N.[Mn] RRZKHZBOZDIQJG-UHFFFAOYSA-N 0.000 description 1
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
【解決手段】本発明による窒素含有鋼の製造方法は、窒素含有合金を溶鋼に投入して溶鋼の窒素成分を調整すること(S2及びS3)、及び窒素含有合金による窒素成分の調整後に、大気圧下において上吹き浸漬ノズルで溶鋼に窒素ガスを吹き込むこと(S5)を含む。
【選択図】図1
Description
実施の形態1.
図1は、本発明の実施の形態1による窒素含有鋼の製造方法を示す工程図である。図1に示すように、本実施の形態の窒素含有鋼の製造方法は、窒素含有鋼として窒素含有ステンレス鋼を製造する方法であり、脱炭工程S1、窒素含有合金投入工程S2、ガス攪拌工程S3、サンプリング工程S4、窒素成分調整工程S5及び出鍋工程S6を含んでいる。
Claims (4)
- 窒素含有合金を溶鋼に投入して前記溶鋼の窒素成分を調整すること、及び
前記窒素含有合金による窒素成分の調整後に、大気圧下において上吹き浸漬ノズルで前記溶鋼に窒素ガスを吹き込むこと
を含むことを特徴とする窒素含有鋼の製造方法。 - 前記上吹き浸漬ノズルで前記溶鋼に窒素ガスを吹き込むとき、前記上吹き浸漬ノズルの先端が前記溶鋼の表面から60cm以上の深さに位置するように、前記上吹き浸漬ノズルが前記溶鋼に浸漬される
ことを特徴とする請求項1記載の窒素含有鋼の製造方法。 - 窒素含有鋼として窒素含有ステンレス鋼を製造する
ことを特徴とする請求項1又は請求項2に記載の窒素含有鋼の製造方法。 - 前記窒素含有合金は、大気圧下で前記溶鋼に投入され、
前記窒素含有合金が投入された前記溶鋼は、26kPa以上かつ40kPa以下の気圧下でガス攪拌される
ことを特徴とする請求項3記載の窒素含有鋼の製造方法。
Priority Applications (1)
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JP2016027944A JP6543203B2 (ja) | 2016-02-17 | 2016-02-17 | 窒素含有鋼の製造方法 |
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JP2017145455A true JP2017145455A (ja) | 2017-08-24 |
JP6543203B2 JP6543203B2 (ja) | 2019-07-10 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021031744A (ja) * | 2019-08-27 | 2021-03-01 | 日本製鉄株式会社 | 高窒素ステンレス溶鋼の溶製方法 |
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2016
- 2016-02-17 JP JP2016027944A patent/JP6543203B2/ja active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021031744A (ja) * | 2019-08-27 | 2021-03-01 | 日本製鉄株式会社 | 高窒素ステンレス溶鋼の溶製方法 |
JP7269485B2 (ja) | 2019-08-27 | 2023-05-09 | 日本製鉄株式会社 | 高窒素ステンレス溶鋼の溶製方法 |
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