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WO2008052921A1 - Procédé de fabrication de produits plats en acier à partir d'un acier multiphase allié à du silicium - Google Patents

Procédé de fabrication de produits plats en acier à partir d'un acier multiphase allié à du silicium Download PDF

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Publication number
WO2008052921A1
WO2008052921A1 PCT/EP2007/061392 EP2007061392W WO2008052921A1 WO 2008052921 A1 WO2008052921 A1 WO 2008052921A1 EP 2007061392 W EP2007061392 W EP 2007061392W WO 2008052921 A1 WO2008052921 A1 WO 2008052921A1
Authority
WO
WIPO (PCT)
Prior art keywords
strip
hot
cold
rolled
thickness
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
Application number
PCT/EP2007/061392
Other languages
German (de)
English (en)
Inventor
Brigitte Hammer
Thomas Heller
Johann Wilhelm Schmitz
Jochen Wans
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 Steel 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.)
Filing date
Publication date
Application filed by ThyssenKrupp Steel AG filed Critical ThyssenKrupp Steel AG
Priority to US12/447,625 priority Critical patent/US20100065161A1/en
Priority to KR1020097007487A priority patent/KR101461585B1/ko
Priority to CN2007800400604A priority patent/CN101528968B/zh
Priority to JP2009533824A priority patent/JP5350255B2/ja
Publication of WO2008052921A1 publication Critical patent/WO2008052921A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/041—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing involving a particular fabrication or treatment of ingot or slab
    • C21D8/0415—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
    • 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0436—Cold 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
    • C21D8/0473—Final recrystallisation annealing
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

Definitions

  • the invention relates to a method for producing flat steel products, such as strips or sheet metal blanks, from high-strength martensitic steels.
  • Such MS steels belong to the group of multiphase steels. These are usually steels whose properties are determined by the type, amount and arrangement of the phases of the structure. The structure therefore has at least two phases (eg ferrite, martensite, bainite). This gives them a strength / formability combination that is superior to conventional steels.
  • This preparation route presents problems in particular when casting peritectically solidifying compositions.
  • These steel grades there is the danger of the formation of longitudinal cracks during continuous casting.
  • the formation of such longitudinal cracks can reduce the quality of the hot strips produced from the cast slabs or thin slabs so much that they become unusable.
  • extensive measures such as increased insulation costs, are required, which can go so far that the processing of such steel grades becomes uneconomical.
  • multiphase steels are of particular interest for the automotive industry because of their high strength on the one hand the use of lower material thicknesses and concomitantly reduce the vehicle weight and on the other hand improve the safety of the vehicle body in the event of a collision (crash behavior) ,
  • multiphase steels with at least constant strength of the overall body allow a reduction in the sheet thickness of a component produced from such multiphase steels compared to a body produced from conventional steels.
  • multiphase steels are melted in the converter steelworks and cast on a continuous casting plant into slabs or thin slabs, which are then hot rolled into hot strip and coiled.
  • the mechanical properties of the hot strip can be varied.
  • the hot strips can be cold-rolled to cold-rolled strip in order to provide thinner sheet-metal thicknesses (EP 0 910 675 B1, EP 0 966 547 B1, EP 1 169 486 B1, EP 1 319 725 B1, EP 1 398 390 A1).
  • SI / cs 051421WO Speech standing type often only in a width and thickness can be made available that are no longer fully meet the demands made in the field of automotive engineering today. Above all, tapes of small thicknesses with sufficient widths can be poorly represented on conventional systems. It also turns out in conventional practice in practice difficult to produce multiphase steels cold strips with strengths of more than 800 MPa.
  • the cast strip is then hot rolled in-line in one or more passes of between 25% and 70% strain to a hot strip.
  • the final temperature of hot rolling is above the Ar 3 temperature.
  • the hot strip obtained is then cooled in two stages. In the first stage of this cooling, a cooling rate of 5 - 100 ° C / s is maintained until a temperature between 400 - 550 0 C is reached. At this temperature, the hot-rolled strip is left to rest for a period of time required to allow bainitic transformation of the steel with a residual austenite content greater than 5%.
  • SI / cs 051421WO Perlite formation should be avoided.
  • the object of the invention was therefore to provide a method by means of which high-strength steel flat products can be produced over a wide range of geometric dimensions with reduced manufacturing outlay.
  • this object has been achieved by a method for producing steel flat products in which a multiphase structure forming steel, the (in wt .-%) 0.10 - 0.15% C, 0 , 80-1.20% Mn, up to 0.030% P, up to 0.004% S, 1.10-1.30% Si, 0.0-0.05% Al, up to 0.0060% N, 0 , 30 - 0.60% Cr, 0.080 - 0.120% Ti, 0.040 - 0.060% Nb, 0.150 - 0.250% Mo and the remainder contains iron and unavoidable impurities, to one
  • SI / cs 051421WO cast strip with a thickness of 1 - 4 mm in which the cast strip in a continuous operation with a degree of deformation of more than 20% in-line lying in the range of 850 - 1000 ° C hot rolling to a hot strip with a thickness 0.5 to 3.2 mm is hot-rolled and in which the hot strip at a 450-700 0 C amount coiling temperature is coiled, so that a hot strip is obtained, the tensile strength R m of at least 880 MPa at an elongation at break a 8 o of at least 5%.
  • the invention uses the possibility of strip casting to process a particularly high-strength, peritectically solidifying multiphase steel into a hot strip. Since the cast strip itself already has a small thickness, only relatively small degrees of deformation must be maintained in the course of hot rolling this strip in order to produce flat products with small thicknesses, as required in particular in the automotive industry. Thus, it is easily possible by specifying a corresponding output thickness of the cast strip to produce hot strips with the inventive method, which at an optimal
  • Property distribution have a thickness of at most 1.5 mm and from which, for example, produce elements for the support structure of an automobile.
  • the required rolling forces are low compared to the forces required in the hot rolling of slabs or thin slabs in the conventional approach, so that can be easily produced by the inventive method hot strips of large width, well above the width of in
  • the invention makes it possible to manufacture high-strength hot strips consisting of a martensitic steel of the specified composition processed according to the invention, whose width is more than 1,200 mm, in particular more than 1,600 mm.
  • the use according to the invention of the strip casting method in the processing of high-strength steels of the type assembled according to the invention offers the possibility, in addition to the above-mentioned advantages due to its process-specific properties and manipulated variables (eg hot rolling end temperature, cooling, coiling temperature), of also critical steel compositions according to the invention with regard to their solidification behavior to safely shed processed species.
  • process-specific properties and manipulated variables eg hot rolling end temperature, cooling, coiling temperature
  • critical steel compositions according to the invention with regard to their solidification behavior to safely shed processed species.
  • the very rapid solidification of the cast strip which is characteristic of strip casting, leads to a significantly reduced risk of the formation of center segregations compared with conventional production, with the result that the hot strip produced according to the invention has a particularly uniform distribution of properties and microstructure over its cross section and its length.
  • a further particular advantage of the procedure according to the invention is that hot strip produced according to the invention has high strengths of at least 880 MPa, without having to observe a special cooling cycle of the hot strip between the end of the hot rolling and the hasp, as described in EP 1 072 689 Bl is required by the need for a cooling break.
  • the method according to the invention merely has to ensure that the hot rolling ends in a relatively narrow temperature window and that the reeling is also carried out in a precisely defined temperature range. In between there is a one-stage cooling down.
  • a further advantage of the procedure according to the invention is that an extension of the range of mechanical properties of the strip produced according to the invention based on only one steel analysis can be achieved by varying the cooling and rolling conditions.
  • Hot strips produced according to the invention are particularly suitable for further processing into cold rolled strip. Accordingly, a practice-oriented embodiment of the invention provides that the hot strip is cold rolled to a cold strip having a thickness of 0.5-1.4 mm, in particular 0.7 mm to 1.3 mm, as is required for the construction of automobile bodies.
  • the cold strip can be annealed at an annealing temperature of 750-850 ° C.
  • tensile strengths of at least 800 MPa can be reliably ensured.
  • the breaking elongation A 50 of the cold strip is just as safe at least 5%.
  • annealing temperatures By limiting the annealing temperatures to a range of 750-805 0 C, cold strips with tensile strengths of at least 1000 MPa can be produced. Despite these high strengths, an elongation at break A 50 of at least 5% can still be ensured for such annealed strips. Cold tapes with improved
  • a tensile strength of at least 800 MPa can be ensured for the still can be, however, produce a safe manner in that the calcination temperatures in a range of 810 - 850 0 C to be limited.
  • the cold strip is provided in a conventional manner with a metallic coating, which may be, for example, a galvanizing.
  • the strength and elongation values according to the invention produced hot strips can be adjusted over a wide range by an appropriate vote of the hot rolling and reel temperatures. If, for example, hot strips are to be produced which have a tensile strength R m of at least 880 MPa at an elongation at break A 8 o of the resulting hot strip, this can be achieved by setting the hot rolling end temperature in the range from 850 to 1000 ° C. and Reel temperature can be varied in the range of 550 - 700 0 C.
  • a hot strip with guaranteed higher tensile strength R m of at least 1000 MPa at an elongation at break A 8 o generated by at least 5% they will be, the hot-rolling temperature in the range 900-1000 ° C and the coiling temperature in the range 450-550 0 C is chosen.
  • the cast strip was hot-rolled immediately after in-line strip casting at a hot rolling end temperature WET to a hot strip whose thickness was 1.25 mm. Subsequently, each hot strip obtained has been cooled directly in a cooling step to a coiler temperature HT and coiled. After coiling, the hot rolled strip obtained had a tensile strength R m and an elongation at break A 80 , which, like the hot rolling end temperature WET and reel temperature HT observed in its manufacture, are given in Table 2.
  • the hot strip produced in this way has been cold rolled to a 0.7 mm thick cold strip after unreeling and pickling.
  • Another cold strip B was annealed at a temperature of 800 0 C recrystallizing. This cold-rolled strip B had an elongation at break A 50 of 8.6% and a tensile strength R m of 1003 Mpa.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Coating With Molten Metal (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Chemical Vapour Deposition (AREA)

Abstract

L'invention concerne un procédé permettant de fabriquer des produits plats en acier très résistants sur une grande gamme de dimensions géométriques, avec des moyens de fabrication réduits. A cet effet, un acier formant une structure multiphase contenant (en % en poids) 0,10 - 0,15 % C, 0,80 - 1,20 % Mn, jusqu'à 0,030 % P, jusqu'à 0,004 % S, 1,10 - 1,30 % Si, 0,0 - 0,05 % Al, jusqu'à 0,0060 % N, 0,30 - 0,60 % Cr, 0,080 - 0,120 % Ti, 0,040 - 0,060 % Nb, 0,150 - 0,250 % Mo, et le reste de fer et d'impuretés inévitables, est coulé sous forme de bande coulée ayant une épaisseur de 1 - 4 mm; la bande coulée est laminée à chaud en continu avec un degré de déformation de plus de 20 % en ligne, à une température terminale de laminage à chaud de 850 - 1000 °C, sous forme de bande à chaud présentant une épaisseur de 0,5 - 3,2 mm; puis la bande à chaud est bobinée à une température de bobinage de 450 - 700 °C de manière à obtenir une bande à chaud dont la résistance à la traction R<SUB>m</SUB> est d'au moins 880 MPa pour un allongement à la rupture A<SUB>80</SUB> d'au moins 5 %.
PCT/EP2007/061392 2006-10-30 2007-10-24 Procédé de fabrication de produits plats en acier à partir d'un acier multiphase allié à du silicium Ceased WO2008052921A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US12/447,625 US20100065161A1 (en) 2006-10-30 2007-10-24 Method for manufacturing flat steel products from silicon alloyed multi-phase steel
KR1020097007487A KR101461585B1 (ko) 2006-10-30 2007-10-24 실리콘으로 합금화된 다상 강으로부터 평판형 강 제품을 제조하는 방법
CN2007800400604A CN101528968B (zh) 2006-10-30 2007-10-24 由硅合金化多相钢制造扁钢产品的方法
JP2009533824A JP5350255B2 (ja) 2006-10-30 2007-10-24 ケイ素合金化多相鋼からフラット鋼生成物を製造する方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06123141A EP1918405B1 (fr) 2006-10-30 2006-10-30 Procédé pour la fabrication de produits plats à partir d'un acier à plusieurs phases allié en silice
EP06123141.1 2006-10-30

Publications (1)

Publication Number Publication Date
WO2008052921A1 true WO2008052921A1 (fr) 2008-05-08

Family

ID=37781961

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/061392 Ceased WO2008052921A1 (fr) 2006-10-30 2007-10-24 Procédé de fabrication de produits plats en acier à partir d'un acier multiphase allié à du silicium

Country Status (10)

Country Link
US (1) US20100065161A1 (fr)
EP (1) EP1918405B1 (fr)
JP (1) JP5350255B2 (fr)
KR (1) KR101461585B1 (fr)
CN (1) CN101528968B (fr)
AT (1) ATE432375T1 (fr)
DE (1) DE502006003833D1 (fr)
ES (1) ES2325964T3 (fr)
PL (1) PL1918405T3 (fr)
WO (1) WO2008052921A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10071416B2 (en) * 2005-10-20 2018-09-11 Nucor Corporation High strength thin cast strip product and method for making the same
WO2009048838A1 (fr) * 2007-10-10 2009-04-16 Nucor Corporation Acier à structure métallographique complexe et son procédé de fabrication
US20110277886A1 (en) 2010-02-20 2011-11-17 Nucor Corporation Nitriding of niobium steel and product made thereby
EP2439290B1 (fr) * 2010-10-05 2013-11-27 ThyssenKrupp Steel Europe AG Acier à plusieurs phases, produit plat laminé à froid fabriqué à partir d'un tel acier à plusieurs phases et son procédé de fabrication
AT512399B1 (de) 2012-09-10 2013-08-15 Siemens Vai Metals Tech Gmbh Verfahren zum Herstellen eines mikrolegierten Röhrenstahls in einer Gieß-Walz-Verbundanlage und mikrolegierter Röhrenstahl
US11225697B2 (en) 2014-12-19 2022-01-18 Nucor Corporation Hot rolled light-gauge martensitic steel sheet and method for making the same
IT201700010994A1 (it) * 2017-02-01 2018-08-01 Nova Ferr S R L Lama di taglio per un tagliaerba.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0969112A1 (fr) * 1997-03-17 2000-01-05 Nippon Steel Corporation Tole d'acier biphase a haute resistance ayant d'excellentes proprietes de deformation dynamique et son procede de preparation
EP1072689A1 (fr) * 1999-07-30 2001-01-31 Usinor Procédé de fabrication de bandes minces en acier de type "TRIP" , et bandes minces ainsi obtenues
FR2798871A1 (fr) * 1999-09-24 2001-03-30 Usinor Procede de fabrication de bandes d'acier au carbone, notamment d'acier pour emballages, et bandes ainsi produites
EP1396550A1 (fr) * 2002-08-28 2004-03-10 ThyssenKrupp Stahl AG Procédé pour la fabrication d' une bande à chaud
EP1398390A1 (fr) * 2002-09-11 2004-03-17 ThyssenKrupp Stahl AG Acier ferritique-martensitique possédant une resistance élevée ayant une fine microstructure

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5470529A (en) * 1994-03-08 1995-11-28 Sumitomo Metal Industries, Ltd. High tensile strength steel sheet having improved formability
TR199900053T2 (xx) * 1996-07-12 1999-03-22 Thyssen Stahl Aktiengesellschaft �elikten yap�lm�� s�cak �erit ve bu �eridin �retimi i�in bir i�lem.
DE19710125A1 (de) * 1997-03-13 1998-09-17 Krupp Ag Hoesch Krupp Verfahren zur Herstellung eines Bandstahles mit hoher Festigkeit und guter Umformbarkeit
AUPQ779900A0 (en) * 2000-05-26 2000-06-22 Bhp Steel (Jla) Pty Limited Hot rolling thin strip
JP3873886B2 (ja) * 2000-10-19 2007-01-31 Ｊｆｅスチール株式会社 プレス成形用亜鉛めっき鋼板およびその製造方法、並びにプレス成形品の製造方法
JP3927384B2 (ja) * 2001-02-23 2007-06-06 新日本製鐵株式会社 切り欠き疲労強度に優れる自動車用薄鋼板およびその製造方法
DE10128544C2 (de) * 2001-06-13 2003-06-05 Thyssenkrupp Stahl Ag Höherfestes, kaltumformbares Stahlblech, Verfahren zu seiner Herstellung und Verwendung eines solchen Blechs
US6878920B2 (en) * 2002-06-28 2005-04-12 Intel Corporation Optical receiver circuit, method, and system
JP4299560B2 (ja) * 2003-03-20 2009-07-22 日新製鋼株式会社 加工性に優れた高強度合金化溶融亜鉛めっき鋼板の製造方法
JP4317384B2 (ja) * 2003-04-28 2009-08-19 新日本製鐵株式会社 耐水素脆化、溶接性および穴拡げ性に優れた高強度亜鉛めっき鋼板とその製造方法
FR2855184B1 (fr) * 2003-05-19 2006-05-19 Usinor Tole laminee a froid et aluminiee en acier dual phase a tres haute resistance pour ceinture anti-implosion de televiseur, et procede de fabrication de cette tole
US20070144633A1 (en) * 2004-03-31 2007-06-28 Taro Kizu High-stiffness high-strength thin steel sheet and method for producing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0969112A1 (fr) * 1997-03-17 2000-01-05 Nippon Steel Corporation Tole d'acier biphase a haute resistance ayant d'excellentes proprietes de deformation dynamique et son procede de preparation
EP1072689A1 (fr) * 1999-07-30 2001-01-31 Usinor Procédé de fabrication de bandes minces en acier de type "TRIP" , et bandes minces ainsi obtenues
FR2798871A1 (fr) * 1999-09-24 2001-03-30 Usinor Procede de fabrication de bandes d'acier au carbone, notamment d'acier pour emballages, et bandes ainsi produites
EP1396550A1 (fr) * 2002-08-28 2004-03-10 ThyssenKrupp Stahl AG Procédé pour la fabrication d' une bande à chaud
EP1398390A1 (fr) * 2002-09-11 2004-03-17 ThyssenKrupp Stahl AG Acier ferritique-martensitique possédant une resistance élevée ayant une fine microstructure

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LINDENBERG H-U ET AL: "EUROSTRIP - STATE OF THE ART OF STRIP CASTING EUROSTRIP - STAND DER TECHNIK BEIM BANDGIESSEN", STAHL UND EISEN, VERLAG STAHLEISEN, DUSSELDORF, DE, vol. 121, no. 12, 14 December 2001 (2001-12-14), pages 97 - 104, XP001103986, ISSN: 0340-4803 *
SENK D ET AL: "UMFORMEN UND KUEHLEN VON DIREKTGEGOSSENEM STAHLBAND IN-LINE ROLLING AND COOLING OF DIRECT CAST STEEL STRIP", STAHL UND EISEN, VERLAG STAHLEISEN, DUSSELDORF, DE, vol. 120, no. 6, 16 June 2000 (2000-06-16), pages 65 - 69, XP001118293, ISSN: 0340-4803 *

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EP1918405B1 (fr) 2009-05-27
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US20100065161A1 (en) 2010-03-18
EP1918405A1 (fr) 2008-05-07
CN101528968A (zh) 2009-09-09
PL1918405T3 (pl) 2009-10-30
KR101461585B1 (ko) 2015-02-23
DE502006003833D1 (de) 2009-07-09
ATE432375T1 (de) 2009-06-15
ES2325964T3 (es) 2009-09-25

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