US20040074628A1 - Method for producing a hot rolled strip made of a steel comprising a high content of manganese - Google Patents

Method for producing a hot rolled strip made of a steel comprising a high content of manganese Download PDF

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Publication number
US20040074628A1
US20040074628A1 US10/433,729 US43372903A US2004074628A1 US 20040074628 A1 US20040074628 A1 US 20040074628A1 US 43372903 A US43372903 A US 43372903A US 2004074628 A1 US2004074628 A1 US 2004074628A1
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US
United States
Prior art keywords
strip
roughed
hot
weight
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.)
Abandoned
Application number
US10/433,729
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English (en)
Inventor
Bernhard Engl
Dieter Senk
Johann Schmitz
Andreas Offergeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Stahl AG
Priority date (The priority date 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 date listed.)
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7666209&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20040074628(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ThyssenKrupp Stahl AG filed Critical ThyssenKrupp Stahl AG
Assigned to THYSSENKRUPP STAHL AG reassignment THYSSENKRUPP STAHL AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OFFERGELD, ANDREAS, SCHMITZ, JOHANN WILHELM, SENK, DIETER, ENGL, BERNHARD
Publication of US20040074628A1 publication Critical patent/US20040074628A1/en
Priority to US11/796,245 priority Critical patent/US20070199631A1/en
Abandoned legal-status Critical Current

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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 producing a hot strip from a steel which has a high manganese content of more than 12 to 30 weight %. Steels of this type are characterised by particularly high strength.
  • steels which apart from other alloying elements comprise 7% to 27% Mn can be produced by thin-strip casting to form a strip which is close to the final dimensions, and can be processed into hot strip.
  • the material obtained in this way is particularly suitable for application in the area of motor car body construction.
  • This object is met by a method for producing a hot strip with TWIP and TRIP characteristics, from a steel which comprises more than 12 to 30 weight % of manganese, in which a melt is cast in a double-roller casting machine to form a roughed strip close to the final dimensions, said roughed strip comprising a thickness of up to 6 mm, which roughed strip, following casting, is further continuously processed to form hot strip by being rolled in a single hot roll pass to the final thickness of the hot strip.
  • the hot strip produced from the raw material has TRIP (“Transformation Induced Plasticity”) and TWIP (“Twinning Induced Plasticity”) characteristics and consequently is of good deformability which in combination with its high strength make it eminently suitable for use in motor car body construction.
  • the material produced should be as thin as possible.
  • the solidification process can easily be controlled in a targeted way.
  • a controlled process can take account of the fact that, in particular in the case of steels under discussion in this document, the solidification rate has a direct influence on the extent and distribution of micro segregation. This in turn has an influence on grain growth and on the state of the precipitation such as of MnS, AlN and Ti (C, N) which occurs during solidification.
  • the basic settings which have a decisive influence on the ability for further processing and on the usage characteristics of the end product.
  • the steel is cast in a double-roller casting machine.
  • This type of casting machine which is known per se, makes it possible to produce particularly thin raw material which closely approximates the final dimension of the hot strip, with the solidification behaviour, in particular the solidification rate and uniformity of solidification, of such raw material resulting in an optimum cast structure and, associated with it, in optimum deformability.
  • further processing of the raw material to form hot strip comprises controlled cooling, which takes place immediately after casting. This makes it possible to cool in a targeted way the raw material issuing from the casting mould so as to obtain a microstructure which is optimised for further processing. As a rule, cooling will take place at a rate which is accelerated when compared to cooling by exposure to ambient air.
  • the average initial rolling temperature at which the raw material enters the roll stand can range between 1100° C. and 750° C.
  • the characteristics of the hot-rolled strip can furthermore be influenced in a targeted way in that, following hot rolling, the rolled hot strip is cooled in a controlled way.
  • steels which are used according to the invention can comprise up to 3.5 weight %, in particular up to 3 weight %, silicon. Moreover, they can comprise up to 3.5 weight %, in particular up to 3 weight %, aluminium. In steel of the type processed according to the invention, iron and aluminium or iron and silicon form intermetallic phases which occur below the hot forming temperature and which are stable to room temperature.
  • FIGURE A lateral diagrammatic view of the design of a device for producing hot strip
  • Illustration 1 An enlarged section of the edge region of the hot strip produced in the device according to FIG. 1;
  • Illustration 2 An enlarged section of the centre region of the hot strip produced in the device according to FIG. 1.
  • FIGURE diagrammatically shows the design of a device 1 for producing a hot strip W, said device comprising a casting device 2 , a first cooling section 3 , a roll stand 4 , a second cooling section 5 , and a coiling device 6 .
  • a melt S contained in a tundish 7 is poured into the casting gap 10 formed between two casting rollers 8 , 9 , to form roughed strip V.
  • the cast roughed strip V leaves the casting gap 10 in a continuous conveying process at a thickness which can be varied between less than 1 mm and 6 mm.
  • the roughed strip V On its way to the roll stand 4 , the roughed strip V is cooled in a controlled way by means of a cooling medium applied to the surfaces of said roughed strip V in the first cooling section 3 which is arranged below the exit of the casting gap 10 and closely adjacent to it.
  • the thin strip V enters the roll stand 4 at an initial rolling temperature AT, and in said roll stand is rolled to final thickness in one pass.
  • the hot strip W which leaves the roll stand 4 at a final rolling temperature ET passes through the second cooling section 5 .
  • the hot strip W is again brought in a controlled way to the coiling temperature HT by means of a suitable cooling medium, before being coiled in the coiling device 6 , at said coiling temperature HT, to form a coil C.
  • the accompanying diagram shows the initial rolling temperature AT, the final rolling temperature ET and the coiling temperature HT during the processing time after casting in the strip widths which, depending on the composition and the desired characteristics of the hot strip to be produced, can be set in a device designed according to the FIGURE.
  • suitable temperature control management along a specified limiting curve with subsequent isothermal holding, rolling and quenching, the fine grained microstructure of the hot strip can be frozen after the hot strip exits from the roll stand, so that the good usage characteristics of the hot strip remain after hot rolling. This effect can be achieved in particular when the temperature course of the roughed strip and hot strip approximates the lower limiting curve shown in the diagram.
  • the melt S which was poured in the embodiment shown comprised an Mn content of 20 weight %, a C content of 0.003 weight %, a sulphur content of 0.007 weight %, an Si content of 3.0 weight %, an Al content of 3.0 weight %, with the remainder being iron.
  • Illustration 1 shows an enlarged section of the edge region
  • Illustration 2 shows an equally enlarged section of the centre region of a steel made from a hot strip produced in a device shown in the FIGURE. It is evident that the strip comprises a dendritic microstructure comprising austenite and a second phase which is probably a carboniferous phase. The microstructure becomes significantly finer towards the core of the strip.

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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)
US10/433,729 2000-12-06 2001-12-06 Method for producing a hot rolled strip made of a steel comprising a high content of manganese Abandoned US20040074628A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/796,245 US20070199631A1 (en) 2000-12-06 2007-04-27 Method for producing a hot strip from a steel which has a high manganese content

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10069948.1 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 (de) 2000-12-06 2001-12-06 Verfahren zum erzeugen eines warmbandes aus einem einen hohen mangan-gehalt aufweisenden stahl

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/796,245 Continuation US20070199631A1 (en) 2000-12-06 2007-04-27 Method for producing a hot strip from a steel which has a high manganese content

Publications (1)

Publication Number Publication Date
US20040074628A1 true US20040074628A1 (en) 2004-04-22

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ID=7666209

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US10/433,729 Abandoned US20040074628A1 (en) 2000-12-06 2001-12-06 Method for producing a hot rolled strip made of a steel comprising a high content of manganese
US11/796,245 Abandoned US20070199631A1 (en) 2000-12-06 2007-04-27 Method for producing a hot strip from a steel which has a high manganese content

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US11/796,245 Abandoned US20070199631A1 (en) 2000-12-06 2007-04-27 Method for producing a hot strip from a steel which has a high manganese content

Country Status (11)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006048034A1 (de) * 2004-11-03 2006-05-11 Thyssenkrupp Steel Ag Höherfestes, twip-eigenschaften aufweisendes stahlband oder -blech und verfahren zu dessen herstellung mittels “direct strip casting '
US20080164003A1 (en) * 2005-03-05 2008-07-10 Jens Kempken Method and Installation for Producing Light Gauge Steel with a High Manganese Content
US20140116565A1 (en) * 2011-06-17 2014-05-01 National Oilwell Varco Denmark I/S Unbonded flexible pipe
US10450624B2 (en) 2013-07-10 2019-10-22 Thyssenkrupp Steel Europe Ag Method for producing a flat product from an iron-based shape memory alloy

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
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
DE102007059007A1 (de) 2007-12-06 2009-06-18 Salzgitter Flachstahl Gmbh Verfahren zum Erzeugen eines Warmbandes und aus einem Triplex-Leichtbaustahl hergestelltes Warmband
DE102007059006A1 (de) 2007-12-06 2009-06-10 Salzgitter Flachstahl Gmbh Verfahren zum Erzeugen eines Warmbandes und aus einem ferritischen Stahl hergestelltes Warmband
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
KR101563606B1 (ko) 2009-03-11 2015-10-27 잘쯔기터 플래시슈탈 게엠베하 열간압연 스트립을 제조하는 방법 및 페라이트계 강으로부터 제조된 열간압연 스트립
DE102009030324A1 (de) * 2009-06-24 2011-01-05 Voestalpine Stahl Gmbh Manganstahl und Verfahren zur Herstellung desselben
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
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
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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US4331474A (en) * 1980-09-24 1982-05-25 Armco Inc. Ferritic stainless steel having toughness and weldability
US5431753A (en) * 1991-12-30 1995-07-11 Pohang Iron & Steel Co. Ltd. Manufacturing process for austenitic high manganese steel having superior formability, strengths and weldability
US5647922A (en) * 1994-03-25 1997-07-15 Pohang Iron & Steel Co., Ltd. Process for manufacturing high manganese hot rolled steel sheet without any crack
US6358338B1 (en) * 1999-07-07 2002-03-19 Usinor Process for manufacturing strip made of an iron-carbon-manganese alloy, and strip thus produced
US6387192B1 (en) * 1997-07-01 2002-05-14 Georg Frommeyer Light constructional steel and the use thereof

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JPS58144418A (ja) * 1982-02-22 1983-08-27 Nippon Steel Corp 高Ｍｎ鋼の製造方法
DE3440752A1 (de) * 1984-11-08 1986-05-22 Thyssen Stahl AG, 4100 Duisburg Verfahren zur herstellung von warmband mit zweiphasen-gefuege
JPH06322440A (ja) * 1993-05-12 1994-11-22 Nippon Steel Corp 高マンガン非磁性鋼片の圧延方法
CZ283449B6 (cs) * 1993-06-10 1998-04-15 Přerovské Strojírny, A.S. Vysokolegovaná manganová otěruvzdorná ocel
GB2287956B (en) * 1994-03-31 1998-02-04 Daewoo Heavy Ind Co Ltd Thermal refiningless hot-rolled steel and method of making same
DE19724051C1 (de) * 1997-06-07 1999-03-11 Thyssen Stahl Ag Grobbleche einer Dicke bis 50 mm aus feuerresistenten nickelfreien Stählen für den Stahlbau und Verfahren zur Herstellung von Grobblech daraus
IT1291931B1 (it) * 1997-06-19 1999-01-21 Voest Alpine Ind Anlagen Procedimento per la produzione di nastri grezzi di colaggio in acciaio a basso contenuto di carbonio e nastri cosi' ottenibili
DE19900199A1 (de) * 1999-01-06 2000-07-13 Ralf Uebachs Leichtbaustahllegierung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4331474A (en) * 1980-09-24 1982-05-25 Armco Inc. Ferritic stainless steel having toughness and weldability
US5431753A (en) * 1991-12-30 1995-07-11 Pohang Iron & Steel Co. Ltd. Manufacturing process for austenitic high manganese steel having superior formability, strengths and weldability
US5647922A (en) * 1994-03-25 1997-07-15 Pohang Iron & Steel Co., Ltd. Process for manufacturing high manganese hot rolled steel sheet without any crack
US6387192B1 (en) * 1997-07-01 2002-05-14 Georg Frommeyer Light constructional steel and the use thereof
US6358338B1 (en) * 1999-07-07 2002-03-19 Usinor Process for manufacturing strip made of an iron-carbon-manganese alloy, and strip thus produced

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006048034A1 (de) * 2004-11-03 2006-05-11 Thyssenkrupp Steel Ag Höherfestes, twip-eigenschaften aufweisendes stahlband oder -blech und verfahren zu dessen herstellung mittels “direct strip casting '
US20090010793A1 (en) * 2004-11-03 2009-01-08 Thyssenkrupp Steel Ag Method For Producing High Strength Steel Strips or Sheets With Twip Properties, Method For Producing a Component and High-Strength Steel Strip or Sheet
US20080164003A1 (en) * 2005-03-05 2008-07-10 Jens Kempken Method and Installation for Producing Light Gauge Steel with a High Manganese Content
US20140116565A1 (en) * 2011-06-17 2014-05-01 National Oilwell Varco Denmark I/S Unbonded flexible pipe
US10001228B2 (en) * 2011-06-17 2018-06-19 National Oilwell Varco Denmark I/S Unbonded flexible pipe
US10450624B2 (en) 2013-07-10 2019-10-22 Thyssenkrupp Steel Europe Ag Method for producing a flat product from an iron-based shape memory alloy

Also Published As

Publication number Publication date
CN1466633A (zh) 2004-01-07
DE50102363D1 (de) 2004-06-24
CZ20031558A3 (cs) 2004-02-18
US20070199631A1 (en) 2007-08-30
DE10060948C2 (de) 2003-07-31
WO2002046480A1 (de) 2002-06-13
EP1341937B1 (de) 2004-05-19
AU2002231664A1 (en) 2002-06-18
PL196538B1 (pl) 2008-01-31
EP1341937A1 (de) 2003-09-10
CZ304928B6 (cs) 2015-01-28
ATE267269T1 (de) 2004-06-15
JP2004515362A (ja) 2004-05-27
DE10060948A1 (de) 2002-06-27
ES2221659T3 (es) 2005-01-01
PL362508A1 (en) 2004-11-02
CN1236076C (zh) 2006-01-11
JP3836793B2 (ja) 2006-10-25

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