EP2406023A1 - Verfahren zum erzeugen eines warmbandes und aus einem triplex-leichtbaustahl hergestelltes warmband - Google Patents
Verfahren zum erzeugen eines warmbandes und aus einem triplex-leichtbaustahl hergestelltes warmbandInfo
- Publication number
- EP2406023A1 EP2406023A1 EP09775846A EP09775846A EP2406023A1 EP 2406023 A1 EP2406023 A1 EP 2406023A1 EP 09775846 A EP09775846 A EP 09775846A EP 09775846 A EP09775846 A EP 09775846A EP 2406023 A1 EP2406023 A1 EP 2406023A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- lightweight steel
- melt
- hot strip
- hot
- 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.)
- Ceased
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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
Definitions
- the invention relates to a method for producing a hot strip of a triplex lightweight steel, in which a melt is cast into a precursor and this is then rolled into a hot strip.
- Triplex lightweight steels are via the usual continuous casting route, i. H. Continuous casting of the melt into a slab or thin slab, which is rolled either in-line or separately to a hot strip, or not produced with the required properties.
- the slab or thin slab produced by continuous casting has macrosegregations and forms voids.
- the precursor has a very coarse grain and the casting powder is problematic due to the high aluminum content of the ferritic steel.
- Triplex lightweight steels are known, for example, from DE 10 2005 057 599 A1 and DE 102 31 125 A1. They are characterized by a 3-phase microstructure ⁇ ( ⁇ ) K and due to the high proportion of alloy constituents with a specific gravity below the specific gravity of iron by a correspondingly low weight.
- Triplex lightweight steels are therefore particularly suitable for the automotive industry, which requires such combinations for certain body parts in order to provide evidence of deformation reserves in the event of an accident can.
- the specified upper limit for the thickness of 6 mm can not be achieved with the existing systems, the actual maximum thickness to be set is usually 4 mm, in special cases at max. 5 mm.
- the disadvantage is that only a small degree of hot working during rolling is possible due to the low initial thickness of the pre-strip when a hot strip thickness of 2-3 mm is desired.
- this thickness range for example, on the one hand interesting for the use of hot strip as a lightweight steel in the chassis area z. B. as a transverse or trailing arm.
- the z. B. for B-pillars or side members front and rear can be used.
- a low degree of hot working means coarse grain, which has a negative effect on the ductility and thus on the formability.
- the object of the invention is therefore to provide a method for producing hot strip from a triplex lightweight steel, with a fine grain can be adjusted while maintaining the advantages of the two-roller casting machine in the hot strip of 2 - 3 mm thickness.
- This object is achieved by a method in which the melt is flow-calmed in a horizontal strip casting plant and free from casting into a preliminary strip in the range between 6 and 20 mm and then rolled to hot strip with a degree of deformation of at least 50%.
- the advantage of the proposed method is the fact that when using a horizontal strip casting machine as a casting machine, the advantages of the known two-roller casting machine, such as reducing the marrow oysterings, suppression of voids and avoiding G confusepulverproblematik, even at high Al contents in ferritic steel also come into play and beyond the thickness of the pre-strip is considerably greater than the thickness of a Vorbandes produced by a two-roller casting machine.
- Triplex lightweight steels do not show complete ⁇ - ⁇ conversion, this results in a tendency for coarse grain formation, which can be reversed by a sufficient degree of hot rolling.
- the triplex lightweight steel also derives its positive properties from the nano-disperse "kappa" carbides in the austenitic matrix: The rapid cooling of the melt favors the fine distribution and low growth of the carbides, so that after hot rolling and annealing Advantages of the proposed casting process obtained by the favorable carbide distribution.
- the considered disadvantageous bending during solidification is avoided in that the underside of the casting tape receiving the melt is supported on a plurality of juxtaposed rollers.
- the support is reinforced in such a way that in the region of the casting belt, a negative pressure is generated, so that the casting belt is pressed firmly on the rollers.
- the length of the conveyor belt is selected so that at the end of the conveyor belt before its deflection, the Vorband is largely solidified.
- a homogenization zone which is used for temperature compensation and possible stress relief.
- Rolling from pre-strip to hot strip can be done either in-line or separately off-line.
- the pre-strip Before off-line rolling, the pre-strip can be either directly hot-rolled or sliced into sheets prior to cooling after production. The strip or sheet material is then reheated after eventual cooling and unwound for off-line rolling or reheated and rolled as a sheet.
- Favorable engineering values are achieved if the degree of deformation is> 70% and a mean particle size of> 6 ASTM can be set.
- a preferred quality for the triplex lightweight steel is one with high Mn contents> 18 wt .-%, with high Al contents> 8 wt .-%, with C contents> 0.6 wt .-% and low Si Contained with ⁇ 0.25 wt .-%.
- one or more excretion-forming elements of type B, Ta, Zr, Nb, V, Ti, Mo and W of at most 2% by weight may be added.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2009/000329 WO2010102596A1 (de) | 2009-03-11 | 2009-03-11 | Verfahren zum erzeugen eines warmbandes und aus einem triplex-leichtbaustahl hergestelltes warmband |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2406023A1 true EP2406023A1 (de) | 2012-01-18 |
Family
ID=41050967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09775846A Ceased EP2406023A1 (de) | 2009-03-11 | 2009-03-11 | Verfahren zum erzeugen eines warmbandes und aus einem triplex-leichtbaustahl hergestelltes warmband |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120121452A1 (de) |
EP (1) | EP2406023A1 (de) |
KR (1) | KR101588724B1 (de) |
RU (1) | RU2492022C2 (de) |
WO (1) | WO2010102596A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011010040B3 (de) | 2011-02-02 | 2012-08-02 | Salzgitter Flachstahl Gmbh | Verfahren und Einrichtung zum Erzeugen eines gegossenen Bandes aus Stahl mit über den Bandquerschnitt und die Bandlänge einstellbaren Werkstoffeigenschaften |
DE102011121705A1 (de) | 2011-12-12 | 2013-06-13 | Salzgitter Flachstahl Gmbh | Schweißzusatz zum Lichtbogen- und Laserstrahlschweißen von Mischverbindungen aus austenitischem und ferritischem Stahl |
DE102012002642B4 (de) * | 2012-02-08 | 2013-08-14 | Salzgitter Flachstahl Gmbh | Warmband zur Herstellung eines Elektroblechs und Verfahren hierzu |
DE102012013425A1 (de) | 2012-07-03 | 2014-01-09 | Salzgitter Flachstahl Gmbh | Kontinuierlich arbeitende Bandgieß- und Walzanlage |
WO2014180456A1 (de) | 2013-05-06 | 2014-11-13 | Salzgitter Flachstahl Gmbh | Verfahren zur herstellung von bauteilen aus leichtbaustahl |
DE102014005662A1 (de) | 2014-04-17 | 2015-10-22 | Salzgitter Flachstahl Gmbh | Werkstoffkonzept für einen umformbaren Leichtbaustahl |
RU2627537C1 (ru) * | 2016-07-11 | 2017-08-08 | Юлия Алексеевна Щепочкина | Литой высокобористый сплав |
RU2629400C1 (ru) * | 2016-07-11 | 2017-08-29 | Юлия Алексеевна Щепочкина | Литой высокобористый сплав |
RU185352U1 (ru) * | 2018-06-25 | 2018-12-03 | Публичное акционерное общество "Северсталь" | Заготовка для получения профилей для легких стальных тонкостенных конструкций (лстк) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3263359B2 (ja) * | 1997-04-04 | 2002-03-04 | 川崎製鉄株式会社 | シートバーの大単重熱間圧延方法 |
JP2005504175A (ja) * | 2001-09-28 | 2005-02-10 | ダイムラークライスラー・アクチェンゲゼルシャフト | 高強度デュプレックス/トリプレックス軽量構造用鋼、及びその使用法 |
ITMI20021996A1 (it) * | 2002-09-19 | 2004-03-20 | Giovanni Arvedi | Procedimento e linea di produzione per la fabbricazione di nastro a caldo ultrasottile sulla base della tecnologia della bramma sottile |
EP1699582B1 (de) * | 2003-12-23 | 2013-12-11 | Salzgitter Flachstahl GmbH | Verfahren zum erzeugen von warmbändern aus leichtbaustahl |
DE102004061284A1 (de) * | 2003-12-23 | 2005-07-28 | Salzgitter Flachstahl Gmbh | Verfahren zum Erzeugen von Warmbändern aus Leichtbaustahl |
DE102005052774A1 (de) * | 2004-12-21 | 2006-06-29 | Salzgitter Flachstahl Gmbh | Verfahren zum Erzeugen von Warmbändern aus Leichtbaustahl |
AT504782B1 (de) * | 2005-11-09 | 2008-08-15 | Siemens Vai Metals Tech Gmbh | Verfahren zur herstellung eines warmgewalzten stahlbandes und kombinierte giess- und walzanlage zur durchführung des verfahrens |
DE102005057599A1 (de) * | 2005-12-02 | 2007-06-06 | Volkswagen Ag | Leichtbaustahl |
DE102005062854A1 (de) * | 2005-12-23 | 2007-07-05 | Salzgitter Flachstahl Gmbh | Verfahren und Einrichtung zum Erzeugen von metallischen Warmbändern insbesondere aus Leichtbaustahl |
-
2009
- 2009-03-11 KR KR1020117021000A patent/KR101588724B1/ko active IP Right Grant
- 2009-03-11 EP EP09775846A patent/EP2406023A1/de not_active Ceased
- 2009-03-11 US US13/255,548 patent/US20120121452A1/en not_active Abandoned
- 2009-03-11 RU RU2011141083/02A patent/RU2492022C2/ru active
- 2009-03-11 WO PCT/DE2009/000329 patent/WO2010102596A1/de active Application Filing
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2010102596A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR20110128289A (ko) | 2011-11-29 |
RU2492022C2 (ru) | 2013-09-10 |
RU2011141083A (ru) | 2013-04-20 |
US20120121452A1 (en) | 2012-05-17 |
KR101588724B1 (ko) | 2016-01-26 |
WO2010102596A1 (de) | 2010-09-16 |
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Inventor name: SPRINGUB, BIANCA Inventor name: KONRAD, JOACHIM Inventor name: SCHAEPERKOETTER, MARKUS Inventor name: SPITZER, KARL-HEINZ Inventor name: GEORGEOU, ZACHARIAS Inventor name: EICHHOLZ, HELLFRIED |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KONRAD, JOACHIM Inventor name: GEORGEOU, ZACHARIAS Inventor name: SCHAEPERKOETTER, MARKUS Inventor name: SPRINGUB, BIANCA Inventor name: SPITZER, KARL-HEINZ Inventor name: EICHHOLZ, HELLFRIED |
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