JP4303578B2 - 鋼の連続鋳造鋳片の中心欠陥低減方法 - Google Patents
鋼の連続鋳造鋳片の中心欠陥低減方法 Download PDFInfo
- Publication number
- JP4303578B2 JP4303578B2 JP2003425262A JP2003425262A JP4303578B2 JP 4303578 B2 JP4303578 B2 JP 4303578B2 JP 2003425262 A JP2003425262 A JP 2003425262A JP 2003425262 A JP2003425262 A JP 2003425262A JP 4303578 B2 JP4303578 B2 JP 4303578B2
- Authority
- JP
- Japan
- Prior art keywords
- steel
- rem
- slab
- center
- central
- 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.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 79
- 239000010959 steel Substances 0.000 title claims description 79
- 238000000034 method Methods 0.000 title claims description 27
- 230000007547 defect Effects 0.000 title claims description 24
- 239000013078 crystal Substances 0.000 claims description 26
- 238000009749 continuous casting Methods 0.000 claims description 21
- 238000005204 segregation Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 229910000532 Deoxidized steel Inorganic materials 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 78
- 238000005266 casting Methods 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- 238000007711 solidification Methods 0.000 description 11
- 230000008023 solidification Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000007670 refining Methods 0.000 description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 238000011081 inoculation Methods 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- -1 here Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910007981 Si-Mg Inorganic materials 0.000 description 1
- 229910008316 Si—Mg Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Continuous Casting (AREA)
Description
(1)鋳片厚が250mm 以上のAl脱酸鋼の連続鋳造において、タンディッシュ溶鋼中の溶存REM 濃度を0.5ppm以上60ppm 未満、溶存Mg濃度を70ppm 未満とすることにより微細な中心等軸晶を形成させ、偏析粒径あるいは中心ポロシティ径と発生量を低減することを特徴とする鋼の連続鋳造鋳片の中心欠陥低減方法。
(2)前記(1)に記載した方法において、ストランド内で中心部の固相率が0以上0.3 以下の位置で電磁攪拌することを特徴とする鋼の連続鋳造鋳片の中心欠陥低減方法。
よって、本発明は従来の問題点を一掃した鋼の連続鋳造鋳片の中心欠陥低減方法として産業の発展に寄与するところは極めて大である。
以下、本発明の構成要件である溶存REM 、溶存Mg濃度の限定理由とその効果、さらに電磁攪拌との組合せ効果、異なる鋳片厚における効果について説明する。
<式 (1)>
ポロシティ体積率(%)
=(面積1×0.8mm +面積2×1.25mm+面積3×1.75mm)/測定体積×100
ここで、面積1は空洞厚さ0.6mm 以上1.0mm 未満、面積2は空洞厚さ1.0mm 以上1.5mm 未満、面積3は空洞厚さ1.5mm 以上の面積である。測定体積は70000mm3である。
本発明材は比較材に対して、偏析粒評点と中心ポロシティ径とポロシティ体積率を比較すると、いづれの指標も、鋳片厚320mm と600 mmが鋳片厚250mm よりも改善度合が大きく、鋳片厚300mm 以上の極厚材ほど本発明の効果が大きいことがわかった。
2−2’中心等軸晶サイズ測定位置
3−3’中心等軸晶サイズ測定位置
4 中心等軸晶
5 柱状晶帯
6 中心等軸晶サイズ測定範囲
7 等軸晶帯
8 鋳造方向
9 1/2 巾部
10 鋳片
11 鋳片厚
12 鋳片巾
Claims (2)
- 鋳片厚が250mm 以上のAl脱酸鋼の連続鋳造において、タンディッシュ溶鋼中の溶存REM 濃度を0.5ppm以上60ppm 未満、溶存Mg濃度を70ppm 未満とすることにより微細な中心等軸晶を形成させ、偏析粒径あるいは中心ポロシティ径と発生量を低減することを特徴とする鋼の連続鋳造鋳片の中心欠陥低減方法。
- 請求項1に記載した方法において、ストランド内で中心部の固相率が0以上0.3 以下の位置で電磁攪拌することを特徴とする鋼の連続鋳造鋳片の中心欠陥低減方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003425262A JP4303578B2 (ja) | 2003-12-22 | 2003-12-22 | 鋼の連続鋳造鋳片の中心欠陥低減方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003425262A JP4303578B2 (ja) | 2003-12-22 | 2003-12-22 | 鋼の連続鋳造鋳片の中心欠陥低減方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005177848A JP2005177848A (ja) | 2005-07-07 |
JP4303578B2 true JP4303578B2 (ja) | 2009-07-29 |
Family
ID=34785204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003425262A Expired - Fee Related JP4303578B2 (ja) | 2003-12-22 | 2003-12-22 | 鋼の連続鋳造鋳片の中心欠陥低減方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4303578B2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4609330B2 (ja) * | 2006-01-26 | 2011-01-12 | 住友金属工業株式会社 | 内質に優れた極厚鋼板および極厚鋼板用鋳片の連続鋳造方法 |
JP5061977B2 (ja) * | 2008-03-18 | 2012-10-31 | 住友金属工業株式会社 | 凝固組織が等軸デンドライトを有する鋼の連続鋳造方法 |
JP6500630B2 (ja) * | 2014-10-27 | 2019-04-17 | 日本製鉄株式会社 | 溶鋼の連続鋳造方法および連続鋳造鋳片 |
JP6728933B2 (ja) * | 2016-04-25 | 2020-07-22 | 日本製鉄株式会社 | 溶鋼の連続鋳造方法 |
JP6728934B2 (ja) * | 2016-04-25 | 2020-07-22 | 日本製鉄株式会社 | 溶鋼の連続鋳造方法 |
JP7360033B2 (ja) * | 2019-11-22 | 2023-10-12 | 日本製鉄株式会社 | 鋼の薄肉鋳片及び鋼の薄肉鋳片製造方法 |
-
2003
- 2003-12-22 JP JP2003425262A patent/JP4303578B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2005177848A (ja) | 2005-07-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7462250B2 (en) | High strength, high toughness, high carbon steel wire rod and method of production of same | |
JP2009242882A (ja) | 精密プレス加工に適したチタン銅 | |
JP4303578B2 (ja) | 鋼の連続鋳造鋳片の中心欠陥低減方法 | |
JP4858295B2 (ja) | 析出物が微細分散した高強度鋼材および高強度鋼材用鋳片の連続鋳造方法 | |
US20120261085A1 (en) | Extremely low carbon steel plate excellent in surface characteristics, workability, and formability and a method of producing extremely low carbon cast slab | |
JP6645214B2 (ja) | 低炭素鋼薄肉鋳片の製造方法および低炭素鋼薄肉鋳片、並びに低炭素鋼薄鋼板の製造方法 | |
JP5942712B2 (ja) | スカム堰、薄肉鋳片の製造方法、薄肉鋳片の製造装置 | |
CN115488298A (zh) | 一种高碳钢线材用连铸坯及其制备方法 | |
JP2017018978A (ja) | Al含有鋼用連続鋳造パウダーおよび連続鋳造方法 | |
KR101243246B1 (ko) | 오스테나이트계 스테인리스강의 고청정 정련 방법 | |
JP4757661B2 (ja) | 厚鋼板用大断面鋳片の垂直型連続鋳造方法 | |
JP4289205B2 (ja) | 連続鋳造方法および連続鋳造鋳片 | |
JP2001049322A (ja) | 耐リジング性に優れたフェライト系ステンレス鋼の製造方法 | |
JP4717357B2 (ja) | 炭素鋼の高速連続鋳造方法 | |
JP2019018238A (ja) | 低炭素鋼薄肉鋳片の製造方法および低炭素鋼薄肉鋳片、並びに低炭素鋼薄鋼板の製造方法 | |
JP3953626B2 (ja) | 絞り加工性に優れたフェライト系ステンレス鋼及びその製造方法 | |
JP2018193595A (ja) | 炭素鋼鋳片及び炭素鋼鋳片の製造方法 | |
JP4081222B2 (ja) | 微細な凝固組織を備えた鋳片及びそれを加工した鋼材 | |
JP6561778B2 (ja) | 鋳片の製造方法 | |
JP6728933B2 (ja) | 溶鋼の連続鋳造方法 | |
JP4081218B2 (ja) | 連続鋳造方法 | |
JP2001192723A (ja) | 希土類元素含有ステンレス鋼の製造方法 | |
JP2004276042A (ja) | 無方向性電磁鋼板用溶鋼の連続鋳造方法及びその鋳片 | |
JP4592974B2 (ja) | 無方向性電磁鋼板用溶鋼の連続鋳造方法及び無方向性電磁鋼板用鋳片 | |
CN117604366A (zh) | 一种钢板铸坯的制备方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060822 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20061114 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20081104 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20081225 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090127 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090326 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20090417 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20090424 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120501 Year of fee payment: 3 |
|
R151 | Written notification of patent or utility model registration |
Ref document number: 4303578 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120501 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130501 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130501 Year of fee payment: 4 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130501 Year of fee payment: 4 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130501 Year of fee payment: 4 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130501 Year of fee payment: 4 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140501 Year of fee payment: 5 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
LAPS | Cancellation because of no payment of annual fees |