JP7380900B2 - 鋼の連続鋳造方法 - Google Patents
鋼の連続鋳造方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims description 131
- 239000010959 steel Substances 0.000 title claims description 131
- 238000000034 method Methods 0.000 title claims description 25
- 238000005266 casting Methods 0.000 title claims description 5
- 239000011575 calcium Substances 0.000 claims description 40
- 238000009749 continuous casting Methods 0.000 claims description 40
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 38
- 229910052791 calcium Inorganic materials 0.000 claims description 38
- 229910052799 carbon Inorganic materials 0.000 claims description 36
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 229910052782 aluminium Inorganic materials 0.000 claims description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 28
- 239000010703 silicon Substances 0.000 claims description 24
- 229910052710 silicon Inorganic materials 0.000 claims description 24
- 229910052596 spinel Inorganic materials 0.000 claims description 24
- 239000011029 spinel Substances 0.000 claims description 24
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 18
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 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 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 83
- 239000000395 magnesium oxide Substances 0.000 description 42
- 239000000463 material Substances 0.000 description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000002844 melting Methods 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- 239000002994 raw material Substances 0.000 description 13
- 230000007423 decrease Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 239000011819 refractory material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 7
- 238000004901 spalling Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 239000002436 steel type Substances 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- -1 is reduced Chemical compound 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910014458 Ca-Si Inorganic materials 0.000 description 3
- 229910020068 MgAl Inorganic materials 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
- AGVJBLHVMNHENQ-UHFFFAOYSA-N Calcium sulfide Chemical class [S-2].[Ca+2] AGVJBLHVMNHENQ-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000011276 addition treatment Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004453 electron probe microanalysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/28—Plates therefor
- B22D41/30—Manufacturing or repairing thereof
- B22D41/32—Manufacturing or repairing thereof characterised by the materials used therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/42—Features relating to gas injection
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Description
炭素は、磁気時効を起こして鉄損を増加させる元素であり、特に、0.0050質量%を超えると、鉄損の増加が顕著となることから、0.0050質量%以下に制限する。好ましくは0.0030質量%以下である。尚、下限については、少ないほど好ましいので、特に規定しない。
珪素は、鋼の電気抵抗を高めて鉄損を低減するのに有効な元素である。特に、本発明では、珪素と同じ効果を有するアルミニウムを低減しているために、珪素を1.5質量%以上含有させる。しかし、珪素が5.0質量%を超えると、磁束密度が低下するだけでなく、鋼が脆化し、冷間圧延中に亀裂を生じるなど、製造性を大きく低下させる。よって、上限は5.0質量%とする。
マンガンは、珪素と同様、鋼の電気抵抗を高めて鉄損を低減するのに有効な元素である。一方、マンガンが3.0質量%を超えると、磁束密度が低下するので、上限は3.0質量%とする。より好ましくはマンガンを0.05質量%以上含有させる。
アルミニウムは、珪素と同様、鋼の電気抵抗を高めて鉄損を低減するのに有効な元素であるが、本発明においては、集合組織を改善し、磁束密度を高める目的から、アルミニウムを低減し、酸可溶アルミニウムで0.003質量%以下に制限する。下限については、少ないほど好ましいので、特に規定しない。
燐は、微量の含有量で鋼の硬さを高める効果が大きい有用な元素であり、要求される硬さに応じて適宜含有させる。しかし、燐の過剰な含有は、冷間圧延性の低下をもたらすので、燐の上限は0.2質量%とする。
硫黄は、硫化物となって介在物を形成し、製造性(熱間圧延性)や製品鋼板の磁気特性を低下させるので、少ないほど好ましい。そこで、本発明においては、上限は0.0050質量%まで許容されるが、磁気特性を重視する場合には、0.0025質量%以下とすることが好ましい。尚、硫黄は少ないほど好ましいので、下限は特に規定しない。
カルシウムは、CaSとなって粗大な硫化物を形成し、MnSなどの微細な硫化物の析出を抑制するので、結晶粒の成長を改善して鉄損を低減する効果がある。このため、全カルシウムは0.001質量%以上とする。一方で、全カルシウムが0.008質量%を超えると、カルシウムの硫化物や酸化物の量が増加して結晶粒の成長を阻害し、却って鉄損特性が低下する。したがって、全カルシウムの上限を0.0080質量%とする。
Claims (3)
- アルミニウムが無添加で、珪素で脱酸され、カルシウムが添加されてカルシウムを含有する溶鋼を連続鋳造して鋳片を製造する鋼の連続鋳造方法であって、
アルミナ-ジルコニア-カーボン質耐火物からなる第1のスライディングノズルプレートで構成されるスライディングノズルが設置された取鍋に前記溶鋼を収容し、
マグネシア-スピネル質耐火物からなる第2のスライディングノズルプレートで構成されるスライディングノズルが設置されたタンディッシュに、前記取鍋から前記溶鋼を注入し、
前記第2のスライディングノズルプレートの流出孔を流下する前記溶鋼中に不活性ガスを吹き込みながら前記タンディッシュから鋳型に前記溶鋼を注入して、前記溶鋼を連続鋳造し、
前記第1のスライディングノズルプレートは、成分組成で、Al 2 O 3 が70~81質量%、SiO 2 が10質量%以下、ZrO 2 が5~18質量%、固定炭素が3~10質量%であり、
前記第2のスライディングノズルプレートは、成分組成で、MgOが89~97質量%、Al 2 O 3 が4~7質量%であることを特徴とする、鋼の連続鋳造方法。 - 前記溶鋼は、成分組成で、珪素が1.5質量%以上、酸可溶アルミニウムが0.003質量%以下(ゼロを含む)、全カルシウムが0.001質量%以上であることを特徴とする、請求項1に記載の鋼の連続鋳造方法。
- 前記溶鋼は、成分組成で、炭素が0.0050質量%以下、珪素が1.5~5.0質量%、マンガンが3.0質量%以下、燐が0.2質量%以下、硫黄が0.0050質量%以下、酸可溶アルミニウムが0.003質量%以下(ゼロを含む)、全カルシウムが0.001~0.008質量%であることを特徴とする、請求項2に記載の鋼の連続鋳造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021116201 | 2021-07-14 | ||
JP2021116201 | 2021-07-14 | ||
PCT/JP2022/022570 WO2023286488A1 (ja) | 2021-07-14 | 2022-06-03 | 鋼の連続鋳造方法 |
Publications (2)
Publication Number | Publication Date |
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JPWO2023286488A1 JPWO2023286488A1 (ja) | 2023-01-19 |
JP7380900B2 true JP7380900B2 (ja) | 2023-11-15 |
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JP2022551342A Active JP7380900B2 (ja) | 2021-07-14 | 2022-06-03 | 鋼の連続鋳造方法 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP7380900B2 (ja) |
KR (1) | KR20240010490A (ja) |
CN (1) | CN117561131A (ja) |
WO (1) | WO2023286488A1 (ja) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004141899A (ja) | 2002-10-23 | 2004-05-20 | Jfe Steel Kk | 取鍋用スライディングノズルプレート |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3505389B2 (ja) * | 1997-10-20 | 2004-03-08 | 新日本製鐵株式会社 | 条用の鋼、Siキルド鋼、及びその連続鋳造による製造方法 |
JP6358275B2 (ja) | 2016-02-23 | 2018-07-18 | 品川リフラクトリーズ株式会社 | スライドプレート耐火物 |
-
2022
- 2022-06-03 JP JP2022551342A patent/JP7380900B2/ja active Active
- 2022-06-03 WO PCT/JP2022/022570 patent/WO2023286488A1/ja active Application Filing
- 2022-06-03 KR KR1020237043803A patent/KR20240010490A/ko unknown
- 2022-06-03 CN CN202280043667.2A patent/CN117561131A/zh active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004141899A (ja) | 2002-10-23 | 2004-05-20 | Jfe Steel Kk | 取鍋用スライディングノズルプレート |
Also Published As
Publication number | Publication date |
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WO2023286488A1 (ja) | 2023-01-19 |
JPWO2023286488A1 (ja) | 2023-01-19 |
KR20240010490A (ko) | 2024-01-23 |
CN117561131A (zh) | 2024-02-13 |
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