JPS5514173A - Surface crack preventing method of steel cast billet containing nb and v - Google Patents
Surface crack preventing method of steel cast billet containing nb and vInfo
- Publication number
- JPS5514173A JPS5514173A JP8713678A JP8713678A JPS5514173A JP S5514173 A JPS5514173 A JP S5514173A JP 8713678 A JP8713678 A JP 8713678A JP 8713678 A JP8713678 A JP 8713678A JP S5514173 A JPS5514173 A JP S5514173A
- Authority
- JP
- Japan
- Prior art keywords
- cast billet
- surface layer
- cooling
- layer parts
- suppresses
- 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.)
- Pending
Links
Landscapes
- Continuous Casting (AREA)
Abstract
PURPOSE: To prevent surface cracks of billets by cooling and recuperating the surface layer parts of the steel cast billets containing Nb and V through repetition of plural times respectively at the specific temperatures in the secondary cooling zone.
CONSTITUTION: In the continuous casting operation of the molten steel containing one or more kinds of Nb, V normally within a range of 0.02 to 0.2wt%, cooling- recuperation are repeated more than twice in the secondary cooling zone so as to provide temperature at the cooling of cast billet surface layer parts ( ≤ 10mm ); ≤ Ar1, recuperation temperature; Ac3 thru Ac3 + 100°C. This fines the austenite particle sizes of the cast billet surface layer parts down to 0.2 mm or under, suppresses the grain goundary deposition of carbide and nitride such as Nb(NC), V(NC), etc. and suppresses the deposition of film-form pro-eutectoid ferrite along the austenite grain boundary at the successive γ-α transformation, thereby enabling the surface cracks of the cast billet to be prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8713678A JPS5514173A (en) | 1978-07-19 | 1978-07-19 | Surface crack preventing method of steel cast billet containing nb and v |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8713678A JPS5514173A (en) | 1978-07-19 | 1978-07-19 | Surface crack preventing method of steel cast billet containing nb and v |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5514173A true JPS5514173A (en) | 1980-01-31 |
Family
ID=13906542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8713678A Pending JPS5514173A (en) | 1978-07-19 | 1978-07-19 | Surface crack preventing method of steel cast billet containing nb and v |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5514173A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63115654A (en) * | 1986-11-05 | 1988-05-20 | Mitsubishi Heavy Ind Ltd | Method and apparatus for casting metal sheet |
JPH0237941A (en) * | 1988-07-27 | 1990-02-07 | Nkk Corp | Method for casting austenitic grain coarsened steel |
JPH05161948A (en) * | 1991-12-13 | 1993-06-29 | Nippon Steel Corp | Continuous casting method |
JP2005298909A (en) * | 2004-04-13 | 2005-10-27 | Nippon Steel Corp | Cast slab having reduced surface crack |
WO2016012131A1 (en) * | 2014-07-23 | 2016-01-28 | Sms Group Gmbh | Method for producing a metal product |
JP2017124415A (en) * | 2016-01-13 | 2017-07-20 | 新日鉄住金エンジニアリング株式会社 | Continuous casting method and continuous casting facility |
KR20200048080A (en) * | 2018-10-29 | 2020-05-08 | 주식회사 포스코 | The Method of Manufacturing Continuous Casted Slab |
-
1978
- 1978-07-19 JP JP8713678A patent/JPS5514173A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63115654A (en) * | 1986-11-05 | 1988-05-20 | Mitsubishi Heavy Ind Ltd | Method and apparatus for casting metal sheet |
JPH0237941A (en) * | 1988-07-27 | 1990-02-07 | Nkk Corp | Method for casting austenitic grain coarsened steel |
JPH05161948A (en) * | 1991-12-13 | 1993-06-29 | Nippon Steel Corp | Continuous casting method |
JP2005298909A (en) * | 2004-04-13 | 2005-10-27 | Nippon Steel Corp | Cast slab having reduced surface crack |
WO2016012131A1 (en) * | 2014-07-23 | 2016-01-28 | Sms Group Gmbh | Method for producing a metal product |
US10894994B2 (en) | 2014-07-23 | 2021-01-19 | Sms Group Gmbh | Method for producing a metal product |
JP2017124415A (en) * | 2016-01-13 | 2017-07-20 | 新日鉄住金エンジニアリング株式会社 | Continuous casting method and continuous casting facility |
KR20200048080A (en) * | 2018-10-29 | 2020-05-08 | 주식회사 포스코 | The Method of Manufacturing Continuous Casted Slab |
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