EP1341937B1 - Procede de production d'un feuillard a chaud en acier presentant une teneur elevee en maganese - Google Patents

Procede de production d'un feuillard a chaud en acier presentant une teneur elevee en maganese Download PDF

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Publication number
EP1341937B1
EP1341937B1 EP01991793A EP01991793A EP1341937B1 EP 1341937 B1 EP1341937 B1 EP 1341937B1 EP 01991793 A EP01991793 A EP 01991793A EP 01991793 A EP01991793 A EP 01991793A EP 1341937 B1 EP1341937 B1 EP 1341937B1
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EP
European Patent Office
Prior art keywords
strip
hot
roughed
weight
hot strip
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 - Lifetime
Application number
EP01991793A
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German (de)
English (en)
Other versions
EP1341937A1 (fr
Inventor
Bernhard Dr.-Ing. Engl
Dieter Prof. Dr.-Ing. Senk
Johann Wilhelm Dr. Schmitz
Andreas Dipl.-Ing. Offergeld
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ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Stahl AG
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Application filed by ThyssenKrupp Stahl AG filed Critical ThyssenKrupp Stahl AG
Publication of EP1341937A1 publication Critical patent/EP1341937A1/fr
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Classifications

    • 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
    • C21D8/0215—Rapid solidification; Thin strip casting
    • 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
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • 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
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02—Rolling special iron alloys, e.g. stainless steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills

Definitions

  • the invention relates to a method for generating a Hot strip from a high, more than 12 to 30 Steel having a manganese content by weight. Steels of this type are particularly high Strength.
  • a problem in the manufacture and processing of Steels with such high manganese contents is that they have a freezing behavior have, which differs from the usual for Deep-drawing applications of certain steels, such as IF or low-carbon steels, different. This shows that in conventional slab casting cast, high manganese Steel of the type in question have poor forming behavior.
  • DE 199 00 199 A1 can be steels, alongside other alloying elements Contain 7% to 27% Mn, by thin strip casting as Produce strip close to the final dimension and hot strip to process.
  • the material thus obtained is suitable in special way for application in the field of Automotive body shop.
  • the object of the invention is a method indicate which is the production of steel strips enables that despite a high manganese content have good forming behavior.
  • This task is accomplished by a method for generating a Hot strip with TWIN and TRIP properties a steel containing more than 12 to 30% by weight of manganese solved, in which a melt in a two-roll casting machine close to final dimensions to a supporting strip with a Thickness of up to 6 mm is shed, which in the connection casting continuously to hot strip is processed by being in a single Hot roll pass rolled to the final thickness of the hot strip becomes.
  • high manganese steel becomes shed a material, the dimensions of which Final dimensions of the hot strip are approximated.
  • a thin material becomes wise already in the casting process produces a substantially uniform solidification is ensured over its entire cross-section.
  • Poured primary material close to the final dimensions is essential has a more fine-grained, more even structure than Steel strip with a conventional way comparable high manganese content.
  • That from the primary material hot strip produced has TRIP ("Transformation-Induced-Plasticity") - and TWIP (“Twinning-Induced-Plasticity”) properties and accordingly has a good one Formability on which it is combined with the high Strength in a special way for use in Makes body construction suitable.
  • the thickness of the material produced be as low as possible.
  • the thinner the cast The primary material is, the finer the solidification structure and the fewer errors caused by solidification Disrupt further processing to hot strip.
  • Leaves at the same time the process for a thin cast intermediate product Controlling solidification in a simple way. So can take the circumstance into account in a controlled process be worn that especially in steels here in Kind of the speed of solidification direct influence on the amount and distribution of Has micro segregations. These in turn influence that Grain growth and the state of solidification excretions occurring, such as MnS, AlN and Ti (C, N).
  • the steel is cast according to the invention in a two-roll casting machine.
  • This known per se Casting machine type allows, particularly thin, the final dimension of the hot strip is very close
  • solidification behavior in particular its rate of solidification and - Uniformity to an optimal casting structure and thus accompanied by an optimized formability.
  • the mean rolling starting temperature with which the raw material runs into the roll stand between 1100 ° C and 750 ° C can be.
  • the Properties of the hot rolled strip beyond are specifically influenced by the fact that the rolled Hot strip checked after hot rolling is cooled.
  • the invention hot strip obtained "inline" for example to a Cold strip to process further.
  • Processing steps or properties to be set the hot strip be useful if the strip in Is reeled into a coil during further processing.
  • Steels used according to the invention can be used in addition to further alloying elements up to 3.5% by weight, in particular up to 3% by weight, contain silicon. About that in addition, they can contain up to 3.5% by weight, in particular up to 3% by weight, have aluminum. Iron and aluminum or Iron and silicon form the steels according to the invention processed type intermetallic phases below the hot forming temperature occur and up to Room temperature are stable.
  • the figure shows schematically the structure of a device 1 for generating a hot strip W, the one Pouring device 2, a first cooling section 3 Roll stand 4, a second cooling section 5 and one Reel device 6 includes.
  • pouring device 2 becomes one contained in a tundish 7 Melt S one explained in detail below Composition in the between two casting rolls 8.9 poured casting gap 10 cast to support strip V.
  • the cast pre-strip V leaves the casting gap 10 in one continuous conveying process with a thickness that is variable between less than 1 mm and 6 mm.
  • the preliminary strip V is on its way to the rolling stand 4 in the below the exit of the casting gap 10 and narrow adjacent to this first cooling section 3 with a cooling medium applied to its surfaces cooled down in a controlled manner.
  • the conveyor line is surrounded by an enclosure 11 in which an inert gas atmosphere is maintained. On in this way contact of the tape surface with the Avoided oxygen in the ambient air.
  • the thin strip V runs in the roll stand 4 with a Rolling start temperature AT and is in one Stitch rolled to its final thickness.
  • the roll stand 4 with a final roll temperature ET leaving hot strip W runs immediately then the second cooling section 5.
  • the hot strip W is in turn with a suitable Cooling medium controls the reel temperature HT brought, with which it was finally in the reel 6 is wound into a coil C.
  • the initial roll temperature AT the end roll temperature ET and the reel temperature HT about the processing time after casting in the Bandwidth shown, which varies depending on the Composition and the desired properties of the generating hot strip on a according to the figure Have the assembled device adjusted.
  • a suitable temperature control along a given Limit curve with subsequent isothermal hold rolling and the fine-grained structure of the Hot strip after leaving the rolling stand freeze so that the good performance of the Hot strip is retained after hot rolling.
  • this effect can be to reach.
  • the melt S cast in the exemplary embodiment pointed in addition to the usual unavoidable impurities Mn content of 20% by weight, a C content of 0.003% by weight, a sulfur content of 0.007% by weight, a Si content of 3.0% by weight, an Al content of 3.0% by weight and as Rest of iron on.
  • Figure 1 shows an enlarged section through the Edge area and image 2 one in the same way enlarged section through the middle of one this steel in that shown in the figure Device produced hot strip. It turns out that that Band has a dendritic structure, which is made of austenite and probably one carbon-containing second phase. To the core of the The structure shows a clear refinement.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)

Claims (11)

  1. Procédé de production d'un feuillard à chaud (W) présentant des propriétés TWIP (Twinning-Induced Plasticity) et TRIP (Transformation-Induced Plasticity) constitué d'un acier contenant plus de 12 à 30% en poids de manganèse, procédé dans lequel une masse en fusion (S) est coulée dans une machine de coulée (2) à deux cylindres, dans des dimensions proches des dimensions finales, en un pré-feuillard (V) d'une épaisseur allant jusqu'à 6 mm, ledit pré-feuillard étant, à la suite de la coulée, fini en continu en feuillard à chaud (W) en le laminant en une seule passe de laminage à chaud pour atteindre l'épaisseur finale du feuillard à chaud (W).
  2. Procédé selon la revendication 1, caractérisé en ce que l'épaisseur du pré-feuillard atteint jusqu'à 4 mm, en particulier jusqu'à 2,5 mm.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la finition du pré-feuillard en feuillard à chaud comprend un refroidissement contrôlé se faisant immédiatement après la coulée.
  4. Procédé selon la revendication 3, caractérisé en ce que le refroidissement se fait à une vitesse de refroidissement plus élevée par rapport au refroidissement à l'air.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température initiale de laminage (AT) moyenne, à laquelle le pré-feuillard pénètre dans la cage dé laminoir (4), se situe entre 1100°C et 750°C.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le feuillard à chaud laminé (W) est refroidi de manière contrôlée à la suite du laminage à chaud.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le feuillard à chaud (W) est enroulé en bobine (C) à la fin de la finition.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la finition du pré-feuillard en feuillard (W) se fait au moins par sections sous une atmosphère de gaz de protection.
  9. Procédé selon la revendication 8, caractérisé en ce que le pré-feuillard (V) est maintenu sous l'atmosphère de gaz de protection au moins jusqu'à son entrée dans la cage de laminoir (4).
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'acier contient jusqu'à 3,5% en poids, en particulier jusqu'à 3% en poids, de silicium.
  11. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'acier contient jusqu'à 3,5% en poids, en particulier jusqu'à 3% en poids, d'aluminium.
EP01991793A 2000-12-06 2001-12-06 Procede de production d'un feuillard a chaud en acier presentant une teneur elevee en maganese Expired - Lifetime EP1341937B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10060948 2000-12-06
DE10060948A DE10060948C2 (de) 2000-12-06 2000-12-06 Verfahren zum Erzeugen eines Warmbandes aus einem einen hohen Mangan-Gehalt aufweisenden Stahl
PCT/EP2001/014306 WO2002046480A1 (fr) 2000-12-06 2001-12-06 Procede de production d'un feuillard a chaud en acier presentant une teneur elevee en maganese

Publications (2)

Publication Number Publication Date
EP1341937A1 EP1341937A1 (fr) 2003-09-10
EP1341937B1 true EP1341937B1 (fr) 2004-05-19

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ID=7666209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01991793A Expired - Lifetime EP1341937B1 (fr) 2000-12-06 2001-12-06 Procede de production d'un feuillard a chaud en acier presentant une teneur elevee en maganese

Country Status (11)

Country Link
US (2) US20040074628A1 (fr)
EP (1) EP1341937B1 (fr)
JP (1) JP3836793B2 (fr)
CN (1) CN1236076C (fr)
AT (1) ATE267269T1 (fr)
AU (1) AU2002231664A1 (fr)
CZ (1) CZ304928B6 (fr)
DE (2) DE10060948C2 (fr)
ES (1) ES2221659T3 (fr)
PL (1) PL196538B1 (fr)
WO (1) WO2002046480A1 (fr)

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DE102009030324A1 (de) * 2009-06-24 2011-01-05 Voestalpine Stahl Gmbh Manganstahl und Verfahren zur Herstellung desselben

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JP2004050220A (ja) * 2002-07-18 2004-02-19 Ishikawajima Harima Heavy Ind Co Ltd 帯板製造設備
DE10259230B4 (de) 2002-12-17 2005-04-14 Thyssenkrupp Stahl Ag Verfahren zum Herstellen eines Stahlprodukts
DE102004054444B3 (de) * 2004-08-10 2006-01-19 Daimlerchrysler Ag Verfahren zur Herstellung von Stahlbauteilen mit höchster Festigkeit und Plastizität
EP1807542A1 (fr) * 2004-11-03 2007-07-18 ThyssenKrupp Steel AG Bande ou tole d'acier extremement resistante a proprietes twip et procede de fabrication de ladite bande a l'aide de la "coulee directe de bandes"
FR2878257B1 (fr) * 2004-11-24 2007-01-12 Usinor Sa Procede de fabrication de toles d'acier austenitique, fer-carbone-manganese a tres hautes caracteristiques de resistance et d'allongement, et excellente homogeneite
DE102005052774A1 (de) * 2004-12-21 2006-06-29 Salzgitter Flachstahl Gmbh Verfahren zum Erzeugen von Warmbändern aus Leichtbaustahl
DE102005010243A1 (de) * 2005-03-05 2006-09-07 Sms Demag Ag Verfahren und Anlage zur Herstellung eines Leichtbaustahls mit einem hohen Mangan-Gehalt
JP4555183B2 (ja) * 2005-07-15 2010-09-29 株式会社神戸製鋼所 成形用アルミニウム合金板の製造方法および成形用アルミニウム合金の連続鋳造装置
DE102007059006A1 (de) 2007-12-06 2009-06-10 Salzgitter Flachstahl Gmbh Verfahren zum Erzeugen eines Warmbandes und aus einem ferritischen Stahl hergestelltes Warmband
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DE102008005158A1 (de) 2008-01-18 2009-07-23 Robert Bosch Gmbh Bauelement, insbesondere eine Kraftfahrzeugkomponente, aus einem höherfesten austenitischen Stahl mit TRIP-, TWIP- und/oder SIP-Effekt
US8852356B2 (en) 2009-03-11 2014-10-07 Salzgitter Glachstahl GmbH Method for producing a hot rolled strip and hot rolled strip produced from ferritic steel
EP2721334B1 (fr) * 2011-06-17 2020-03-18 National Oilwell Varco Denmark I/S Tuyau flexible non collé
EP3019292B1 (fr) 2013-07-10 2019-02-27 ThyssenKrupp Steel Europe AG Procédé de fabrication d'un produit plat à partir d'un alliage a memoire de forme à base de fer
CN106583454A (zh) * 2016-12-30 2017-04-26 宁波大学 一种无料头双金属层复合实心轴的连铸—楔横轧成形方法
CN106734203A (zh) * 2016-12-30 2017-05-31 宁波大学 一种无料头双金属层复合空心轴的连铸—楔横轧成形方法
CN108655354B (zh) * 2018-06-07 2019-12-27 东北大学 一种高强塑积中锰钢薄带的短流程制备方法
CN110899644A (zh) * 2018-09-14 2020-03-24 宝山钢铁股份有限公司 一种超薄热轧带钢的生产方法

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Also Published As

Publication number Publication date
US20040074628A1 (en) 2004-04-22
WO2002046480A1 (fr) 2002-06-13
DE10060948A1 (de) 2002-06-27
CN1466633A (zh) 2004-01-07
ATE267269T1 (de) 2004-06-15
CZ20031558A3 (cs) 2004-02-18
DE50102363D1 (de) 2004-06-24
CZ304928B6 (cs) 2015-01-28
CN1236076C (zh) 2006-01-11
JP2004515362A (ja) 2004-05-27
US20070199631A1 (en) 2007-08-30
ES2221659T3 (es) 2005-01-01
PL362508A1 (en) 2004-11-02
PL196538B1 (pl) 2008-01-31
AU2002231664A1 (en) 2002-06-18
EP1341937A1 (fr) 2003-09-10
DE10060948C2 (de) 2003-07-31
JP3836793B2 (ja) 2006-10-25

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