EP2880188A1 - Procédé pour produire une bande d'acier au carbone - Google Patents
Procédé pour produire une bande d'acier au carboneInfo
- Publication number
- EP2880188A1 EP2880188A1 EP13744440.2A EP13744440A EP2880188A1 EP 2880188 A1 EP2880188 A1 EP 2880188A1 EP 13744440 A EP13744440 A EP 13744440A EP 2880188 A1 EP2880188 A1 EP 2880188A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- max
- steel
- weight
- hot
- molten steel
- 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.)
- Granted
Links
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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
Definitions
- the invention relates to a method for producing steel strip of carbon steel using a thin slab caster such as a direct sheet plant (DSP) or direct sheet caster (DSC), in which the steel is continuously cast and in the same installation semi-continuously rolled, or a conventional slab caster with a hot connect to a hot rolling installation.
- a thin slab caster such as a direct sheet plant (DSP) or direct sheet caster (DSC)
- DSP direct sheet plant
- DSC direct sheet caster
- a thin slab caster such as a DSP or DSC for continuously casting the carbon steel or a conventional slab caster with a hot connect to a hot rolling installation.
- a method for producing steel strip of carbon steel using a thin slab caster such as a DSP or DSC for continuously casting the carbon steel or a conventional slab caster with a hot connect to a hot rolling installation comprising the following steps:
- the inventors have found that aluminium is the most suitable element to increase the carbon equivalent of the steel, such that steels having a carbon content between 0.06 and 0.17 weight % can be used in a thin slab caster or conventional caster with hot connect outside the peritectic range.
- the addition of Al to a hitherto peritectic steel does not impair the performance of the product.
- the addition of aluminium improves the formability of the steel by the TRIP effect.
- Manganese is added as austenite stabiliser and to give strength to the steel. It is unusual to add more than 3 weight % manganese in view of casting problems.
- the optional elements mentioned above are added when such is desired to provide a specific steel quality. These elements are usually added to change the mechanical properties and the purpose for which the steel type is used. Calcium is added to improve the castability and forms calciumaluminates with Al.
- the steel contains a more limited amount of carbon, for instance
- the steel contains a more limited amount of manganese, for instance 0.1 - 3.0 weight % Mn, preferably 0.5 - 2.5 weight % Mn, and more preferably 1.0 - 2.0 weight % Mn.
- a more limited amount of manganese are generally used in casting advanced high strength steels.
- the aluminium content of the steel can be more limited, for instance when the carbon content is more limited or when other elements are added.
- the steel contains 0.3 - 1.5 weight % Al, more preferably 0.3 - 1.0 weight % Al, still more preferably 0.5 - 0.8 weight % Al.
- the steel contains 0.1 - 1.5 weight % Si, preferably 0.1 - 1.0 weight % Si, more preferably 0.2 - 0.5 weight % Si.
- the amount of silicon in steel is kept relatively low.
- Chromium is often added to certain steel types for strengthening the steel. Due to its price, usually only limited amounts are added in carbon steels. According to a preferred composition the steel contains 0.1 - 1.0 weight % Cr, more preferably 0.3 - 0.8 weight % Cr.
- the molten steel has the composition of an advanced high strength steel, such as a dual phase steel.
- such dual phase steels have a composition containing the following elements (in weight %): 0.06 - 0.17 C
- the elements in the dual phase steels as shown above are even more limited to reach certain strength levels, such as DP600, DP 800, DP 1000 or DP 1200. Apart from the amount of aluminium, the amount of the elements are known for dual phase steels that are not produced on a DSP, CSP or conventional slab caster with a hot connect.
- a hot rolled steel strip of carbon steel produced with the method according to the first aspect of the invention.
- a cold rolled and annealed steel strip of carbon steel produced by cold rolling and annealing the hot rolled steel strip according to the second aspect of the invention.
- a steel type according to the invention has been cast, having the following composition in weight %:
- This steel type has been cast in the direct sheet plant (DSP) using a standard moulding powder in the mould, with a casting speed of approximately 4.5 m/min. After temperature equalisation in the tunnel oven, the slabs have been rolled in the seven- stand rolling equipment of the DSP to an end thickness of 3 mm.
- DSP direct sheet plant
- a typical standard steel type cast on the DSP has the following composition in weight %:
- the comparison between the standard steel type and the steel type according to the invention shows that the steel type according to the invention has a higher content of all the elements in the steel. This is partly due to the fact that it is the intention to produce an advanced high strength steel, in this case a dual phase steel, after cold rolling of the hot rolled strip.
- the carbon content of 0.090 weight % in the steel type according to the invention is such that without additional measures a peritectic steel would be formed during solidification of the steel in the mould of the DSP, which transformation from the ⁇ - phase to the ⁇ -phase in the iron-carbon diagram causes changes in the volume of the steel leading to the loss of contact between the cast steel and the mould. This results in an irregular cooling of the steel slabs, in turn leading to cracks.
- the steel type according to the invention can be processed in the DSP without risks of surface cracking and damage to the installation due to break-outs.
- the steel produced in accordance with the invention can be a hot rolled steel strip or a cold rolled and annealed steel strip, which in the latter case can be hot dip galvanised or galvannealed.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Metal Rolling (AREA)
Abstract
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13744440.2A EP2880188B1 (fr) | 2012-07-30 | 2013-07-29 | Procédé pour produire une bande d'acier en acier au carbone |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12005543 | 2012-07-30 | ||
PCT/EP2013/002241 WO2014019673A1 (fr) | 2012-07-30 | 2013-07-29 | Procédé pour produire une bande d'acier au carbone |
EP13744440.2A EP2880188B1 (fr) | 2012-07-30 | 2013-07-29 | Procédé pour produire une bande d'acier en acier au carbone |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2880188A1 true EP2880188A1 (fr) | 2015-06-10 |
EP2880188B1 EP2880188B1 (fr) | 2016-07-27 |
Family
ID=48914212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13744440.2A Revoked EP2880188B1 (fr) | 2012-07-30 | 2013-07-29 | Procédé pour produire une bande d'acier en acier au carbone |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2880188B1 (fr) |
KR (1) | KR102099488B1 (fr) |
CN (1) | CN104603297A (fr) |
ES (1) | ES2586507T3 (fr) |
PL (1) | PL2880188T3 (fr) |
WO (1) | WO2014019673A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106987769B (zh) * | 2017-03-29 | 2018-08-03 | 苏州浩焱精密模具有限公司 | 一种高硬度精密蚀刻刀模 |
DE102017131253A1 (de) | 2017-12-22 | 2019-06-27 | Voestalpine Stahl Gmbh | Verfahren zum Erzeugen metallischer Bauteile mit angepassten Bauteileigenschaften |
CN109913755B (zh) * | 2019-03-22 | 2020-09-18 | 山东钢铁股份有限公司 | 一种包晶钢及其制备方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19911287C1 (de) * | 1999-03-13 | 2000-08-31 | Thyssenkrupp Stahl Ag | Verfahren zum Erzeugen eines Warmbandes |
US6962631B2 (en) * | 2000-09-21 | 2005-11-08 | Nippon Steel Corporation | Steel plate excellent in shape freezing property and method for production thereof |
JP3908954B2 (ja) * | 2001-06-05 | 2007-04-25 | 新日本製鐵株式会社 | 形状凍結性に優れたフェライト系薄鋼板およびその製造方法 |
DE10161465C1 (de) | 2001-12-13 | 2003-02-13 | Thyssenkrupp Stahl Ag | Verfahren zum Herstellen von Warmband |
JP4819489B2 (ja) * | 2005-11-25 | 2011-11-24 | Jfeスチール株式会社 | 一様伸び特性に優れた高強度鋼板およびその製造方法 |
JP5167487B2 (ja) | 2008-02-19 | 2013-03-21 | Jfeスチール株式会社 | 延性に優れる高強度鋼板およびその製造方法 |
-
2013
- 2013-07-29 KR KR1020157005273A patent/KR102099488B1/ko active IP Right Grant
- 2013-07-29 CN CN201380044513.6A patent/CN104603297A/zh active Pending
- 2013-07-29 EP EP13744440.2A patent/EP2880188B1/fr not_active Revoked
- 2013-07-29 WO PCT/EP2013/002241 patent/WO2014019673A1/fr active Application Filing
- 2013-07-29 PL PL13744440.2T patent/PL2880188T3/pl unknown
- 2013-07-29 ES ES13744440.2T patent/ES2586507T3/es active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2014019673A1 * |
Also Published As
Publication number | Publication date |
---|---|
PL2880188T3 (pl) | 2016-11-30 |
KR102099488B1 (ko) | 2020-04-10 |
WO2014019673A1 (fr) | 2014-02-06 |
KR20150038499A (ko) | 2015-04-08 |
CN104603297A (zh) | 2015-05-06 |
EP2880188B1 (fr) | 2016-07-27 |
ES2586507T3 (es) | 2016-10-14 |
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