EP2905348A1 - Produit plat en acier haute résistance avec joint bainitique martensitique et procédé de fabrication d'un tel produit plat en acier - Google Patents

Produit plat en acier haute résistance avec joint bainitique martensitique et procédé de fabrication d'un tel produit plat en acier Download PDF

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Publication number
EP2905348A1
EP2905348A1 EP14154354.6A EP14154354A EP2905348A1 EP 2905348 A1 EP2905348 A1 EP 2905348A1 EP 14154354 A EP14154354 A EP 14154354A EP 2905348 A1 EP2905348 A1 EP 2905348A1
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EP
European Patent Office
Prior art keywords
flat steel
hot
content
rolling
steel product
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
Application number
EP14154354.6A
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German (de)
English (en)
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EP2905348B1 (fr
Inventor
Prof. Dr.-Ing. Andreas Kern
Elena Schaffnit
Hans-Joachim Tschersich
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
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ThyssenKrupp Steel Europe AG
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Publication date
Priority to EP14154354.6A priority Critical patent/EP2905348B1/fr
Application filed by ThyssenKrupp Steel Europe AG filed Critical ThyssenKrupp Steel Europe AG
Priority to PCT/EP2015/052135 priority patent/WO2015117934A1/fr
Priority to MX2016009530A priority patent/MX2016009530A/es
Priority to RU2016135949A priority patent/RU2675191C2/ru
Priority to BR112016016949-2A priority patent/BR112016016949B1/pt
Priority to US15/116,958 priority patent/US10724113B2/en
Priority to CA2936733A priority patent/CA2936733C/fr
Priority to AU2015215080A priority patent/AU2015215080B2/en
Publication of EP2905348A1 publication Critical patent/EP2905348A1/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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot 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
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/06—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
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • 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
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • 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
    • 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
    • C21D2211/002—Bainite
    • 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 high-strength steel flat product with a ferrite-free structure, which consists for the most part of martensite and bainite, wherein in the microstructure in addition small amounts of retained austenite may be present.
  • the invention relates to a method for producing a flat steel product according to the invention.
  • Flat steel products of the type in question are typically rolled products, such as steel strips or sheets, as well as blanks and blanks made therefrom.
  • High-strength strip sheets are becoming increasingly important, as not only technical performance, but also resource efficiency and climate protection play an important role today play.
  • the reduction of the dead weight of a steel structure can be achieved by increasing the strength properties.
  • high-strength steel strips and sheets have to meet high demands on toughness properties and brittle fracture resistance, behavior in cold forming, and weldability.
  • a hot rolled steel sheet having a steel composition comprising (in wt%) 0.01-0.2 wt% C, 0.01-2% Si, 0.1-2 Mn, up to 0.1 % P, up to 0.03% S, 0.001-0.1% Al, up to 0.01% N and balance Fe and unavoidable impurities.
  • the flat steel product has a substantially homogeneous and continuously cooled microstructure with an average particle size of 8 microns to 30 microns.
  • a slab of the above composition is pre-rolled.
  • the obtained pre-rolled slab is then hot rolled to a hot strip at a hot rolling end temperature of at least 50 ° C above the Ar3 temperature of the steel.
  • the finished hot-rolled hot strip is cooled after a break of at least 0.5 seconds at a cooling rate of at least 80 ° C / sec of the Ar3 temperature to a less than 500 ° C amounting coiler temperature and finally wound into a coil.
  • WO 03/031669 A1 Furthermore, a high-strength thin steel sheet is known, which is deep drawable and thereby has an excellent dimensional stability. Moreover, this publication describes a method for producing such a flat steel product.
  • the steel sheet in question is characterized by a certain ratio of the X-ray intensities of certain crystallographic orientations and has a certain roughness Ra and a certain friction coefficient of the steel sheet surface at up to 200 ° C and has a lubricant effect.
  • a suitably assembled hot strip is produced by hot rolling at a total reduction ratio of at least 25% at a temperature which is in a range between the Ar3 temperature and the Ar3 temperature + 100 ° C. All flat steel products produced by this process contain ferrite in the microstructure.
  • the object of the invention was to provide a flat steel product which can be produced with reduced expenditure and not only has optimum mechanical properties, such as high strength and at the same time good toughness, but also one has good weldability.
  • the solution according to the invention of the above-stated object is that in the production of flat steel products according to the invention, the working steps enumerated in claim 6 are run through.
  • a flat steel product according to the invention has a microstructure in the hot rolled state which does not comprise ferrite but comprises at least 95% by volume of martensite and bainite with a martensite content of at least 5% by volume.
  • a total of up to 5% by volume of retained austenite and production-related unavoidable microstructural constituents are permitted.
  • a flat steel product according to the invention contains 0.08-0.10% C, 0.015-0.5% Si, 1.20-2.00% Mn, 0.020-0.040% Al , 0.30-1.00% Cr, 0.20-0.30% Mo, 0.020-0.030% Nb, 0.0015-0.0025% B, up to 0.025% P, up to 0.010% S, to to 0.006% N, especially 0.001-0.006% N.
  • Contaminants include up to 0.12% Cu, up to 0.090% Ni, up to 0.0030% Ti, up to 0.009% V, up to 0.0090% Co, up to 0.004% Sb and up to 0.0009% W.
  • a flat steel product according to the invention when hot-rolled, has a minimum yield strength of 900 MPa with simultaneously good elongation at break.
  • the yield strengths of flat steel products according to the invention are in the range of 900-1200 MPa.
  • the elongation at break is typically at least 8% and the tensile strength is typically 950 - 1300 MPa.
  • the notch impact work at -20 ° C is also typically in the range of 65 - 115 J. At -40 ° C is the Impact work on flat steel products according to the invention, typically 40-120 years
  • An essential advantage of the invention over the known prior art is that a flat steel product according to the invention achieves the high strength and good toughness in the hot rolling state without additional heat treatment.
  • steel according to the invention has a structure of bainite and at least 5% by volume of martensite, but has no ferrite.
  • the Martensitanteil in the structure of the steel according to the invention contributes significantly to its strength.
  • the microstructure of the flat steel product according to the invention is fine-grained and thus ensures good elongation at break and toughness.
  • the mean grain size of the structure is a maximum of 20 microns.
  • Copper, nickel, titanium, vanadium, cobalt, tungsten, antimony are the steel from which a flat steel product according to the invention consists, not selectively alloyed, but occur as production-related unavoidable accompanying elements.
  • the Cu content is limited to 0.12 wt% in order to avoid adverse effects on weldability and toughness in the heat affected zone of a weld made on the flat steel product.
  • the other alloying constituents, which are unavoidable due to their production, are likewise to be limited in their respective contents such that they each have no influence on the properties of the flat steel product according to the invention.
  • W satisfies the condition: CE ⁇ W ⁇ 0 . 5
  • the rough-rolling temperature is in the temperature range from 950 ° C to 1250 ° C.
  • the lower limit of the rough-rolling temperature range and the minimum value of the sum of the pre-rolling pressure decreases are set so that the recrystallization processes can still be completed. This results in a fine-grained austenite before finish rolling, which has a positive effect on the toughness properties and elongation at break.
  • the final rolling temperature of the hot rolling carried out in a rolling scale usually comprising a plurality of rolling stands is 810 ° C. to 875 ° C.
  • the upper limit of the predetermined according to the invention for the final rolling temperature range is set so that no recrystallization of the austenite takes place during rolling in the Fertigwarmwalz Sounds. Accordingly, a fine-grained structure is created after the phase transformation.
  • the lower limit of the finish rolling temperature range is 810 ° C. At this temperature, no ferrite is formed during hot rolling, so that the hot strip is free of ferrite at the exit from the hot rolling mill.
  • the interval between the end of hot rolling and the start of cooling should not exceed 10 s in order to prevent unwanted microstructure constituents from forming in the flat steel product.
  • the structure of the thus-cooled hot rolled flat steel product according to the invention already comprises at least 95% by volume of bainite and martensite on arrival in the coiling station, in which the flat steel product is wound into a coil.
  • the inventively prescribed range of reel temperature is chosen so that the desired bainitic - martensitic microstructure in the finished invention flat steel product is safe. At a reel temperature above 500 ° C., the desired bainitic-martensitic structure would not be achieved, with the result that the mechanical properties desired according to the invention, such as high strength and toughness, would not be achieved either.
  • the lower limit of the coiler temperature should not be exceeded in order to ensure optimum flatness and surface of the flat steel product according to the invention without subsequent treatment and at the same time to achieve the desired tempering effect in the coil.
  • the thickness of hot-rolled flat steel products produced according to the invention is typically 2 to 12 mm.
  • the hot strip produced in each case is thus cooled directly from the rolling heat after the thermomechanical rolling, which is accomplished by the combination of a pre-rolling carried out according to the invention with a finished hot rolling also carried out according to the invention, with high cooling rates, in such a way that the desired structure and consequently the mechanical properties are set without subsequent heat treatment.
  • the hot rolling in the hot rolling mill is carried out according to the invention specifically without application of lubricant to the hot strip, the surface of the flat steel product is free of lubricant on leaving the hot rolling stand.
  • Dispensing with lubricant has the advantage that the effort associated with the application of lubricant in the rolling process is eliminated and thus ensures greater efficiency of the overall process. At the same time, by eliminating lubricants, resources are conserved and the environmental and climate impact minimized.
  • the procedure according to the invention in the production of flat steel products according to the invention has the advantage that the phase transformation after the end of hot rolling from a high-abundance austenite with high Cooling speeds takes place. In this way, a fine-grained bainitic-martensitic structure and good toughness or elongation at break properties are achieved.
  • the method according to the invention requires a composition of the steel flat product produced according to the invention, which is characterized by low-cost alloying elements present in comparatively low contents. Expensive and rare alloying elements are not required for the production of a flat steel product according to the invention, so that in this respect too, the production costs associated with the production of flat steel products according to the invention are minimized.
  • the alloy concept based on minimized alloy contents contributes to optimum weldability of flat steel products according to the invention.
  • the surface finishes of hot-rolled flat steel products according to the invention are improved over conventionally produced high-strength hot strips. At the same time, the production costs are reduced.
  • the inventively provided manufacturing path is much simpler, so that it can be carried out with less effort and secure success.
  • One of the essential features of the method of manufacture according to the invention is therefore that the mechanical properties are adjusted by the rolling process, the subsequent rapid cooling and the reeling. Further heat treatments after reeling are not necessary with the procedure according to the invention in order to set the desired properties of the particular flat steel product according to the invention.
  • the high toughness and elongation at break of a flat steel product according to the invention is rather achieved without subsequent heat treatment.
  • the invention thus provides a flat steel product with a minimum yield strength of 900 MPa, whose range of properties make it particularly suitable for the lightweight construction of commercial vehicle chassis and other body parts that are exposed to high loads during use.
  • melts S1, S2 Two steel melts S1, S2 have been produced in the laboratory, the compositions of which are given in Table 1.
  • the melts S1, S2 have each been cast into slabs. Due to the laboratory conditions, the dimensions of the slabs cast from the steels S1, S2 each were 150 mm ⁇ 150 mm ⁇ 500 mm.
  • the slabs were each heated to an austenitizing temperature T A.
  • the slabs thus heated or held at the respective austenitizing temperature T A are then pre-rolled at roughing temperatures T V and Vorwalzumformgraden e V and then hot rolled at Fertigwalzumformgraden e F and hot rolling end temperatures T WE to hot strips W1 - W17 with a thickness d of 3-10 mm ,
  • the obtained hot strips W1-W17 were accelerated at a cooling rate dT to a coiling temperature T H , at which they were subsequently wound into a coil.
  • the steel from which the respective hot strip W1-W17 was produced and the respectively set austenitizing temperature T A , the rough-rolling temperature T V , the rough-rolling deformation degree e V are shown in Table 2.
  • the microstructure of the hot strips W1-W9 produced according to the invention and the hot strips W12-W16 likewise produced according to the invention has between 5% and 33% martensite, with the remainder each consisting of bainite.
  • the hot strips produced according to the invention have in each case high strength values in combination with good elongation properties.
  • the structure consists only of bainite.
  • the hot strips W10, W11 and W17 not according to the invention do not reach the optimum combination of properties which characterizes the hot strips W1-W9 and W12-W16 produced according to the invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)
EP14154354.6A 2014-02-07 2014-02-07 Produit en acier plat de haute résistance avec une structure bainitique-martensitique et procédé de fabrication d'un tel produit acier plat Active EP2905348B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP14154354.6A EP2905348B1 (fr) 2014-02-07 2014-02-07 Produit en acier plat de haute résistance avec une structure bainitique-martensitique et procédé de fabrication d'un tel produit acier plat
MX2016009530A MX2016009530A (es) 2014-02-07 2015-02-03 Producto plano de acero de alta resistencia con estructura bainitica-martensitica y procedimiento para la fabricacion de un producto plano de acero de este tipo.
RU2016135949A RU2675191C2 (ru) 2014-02-07 2015-02-03 Высокопрочный плоский стальной прокат с бейнитно-мартенситной микроструктурой и способ изготовления такого плоского стального проката
BR112016016949-2A BR112016016949B1 (pt) 2014-02-07 2015-02-03 produto plano de aço e método para produzir um produto plano de aço
PCT/EP2015/052135 WO2015117934A1 (fr) 2014-02-07 2015-02-03 Produit en acier plat de résistance élevée ayant une texture à base de bainite et de martensite et procédé de fabrication d'un tel produit en acier plat
US15/116,958 US10724113B2 (en) 2014-02-07 2015-02-03 High-strength flat steel product having a bainitic-martensitic microstructure and method for producing such a flat steel product
CA2936733A CA2936733C (fr) 2014-02-07 2015-02-03 Produit en acier plat de resistance elevee ayant une texture a base de bainite et de martensite et procede de fabrication d'un tel produit en acier plat
AU2015215080A AU2015215080B2 (en) 2014-02-07 2015-02-03 High-strength flat steel product having a bainitic-martensitic microstructure and method for producing such a flat steel product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14154354.6A EP2905348B1 (fr) 2014-02-07 2014-02-07 Produit en acier plat de haute résistance avec une structure bainitique-martensitique et procédé de fabrication d'un tel produit acier plat

Publications (2)

Publication Number Publication Date
EP2905348A1 true EP2905348A1 (fr) 2015-08-12
EP2905348B1 EP2905348B1 (fr) 2019-09-04

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EP14154354.6A Active EP2905348B1 (fr) 2014-02-07 2014-02-07 Produit en acier plat de haute résistance avec une structure bainitique-martensitique et procédé de fabrication d'un tel produit acier plat

Country Status (8)

Country Link
US (1) US10724113B2 (fr)
EP (1) EP2905348B1 (fr)
AU (1) AU2015215080B2 (fr)
BR (1) BR112016016949B1 (fr)
CA (1) CA2936733C (fr)
MX (1) MX2016009530A (fr)
RU (1) RU2675191C2 (fr)
WO (1) WO2015117934A1 (fr)

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CN110382723A (zh) * 2017-02-10 2019-10-25 奥托库姆普联合股份公司 用于通过热成形制造部件的钢以及该部件的用途
CN111500940A (zh) * 2020-06-08 2020-08-07 南京工程学院 具有抑制摩擦火花特性的合金钢锻造制动盘及其制造方法
CN112981230A (zh) * 2021-01-20 2021-06-18 江阴兴澄特种钢铁有限公司 一种双电源切换开关齿轮轴销用钢及其制造方法

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JP6536331B2 (ja) * 2015-10-05 2019-07-03 日本製鉄株式会社 高強度鋼板及びその製造方法
CN108315662B (zh) * 2018-03-30 2019-11-01 湖南华菱涟源钢铁有限公司 一种屈服强度900MPa级热轧钢板及其生产工艺
EP3719147A1 (fr) * 2019-04-01 2020-10-07 ThyssenKrupp Steel Europe AG Produit en acier plat laminé à chaud et son procédé de fabrication
EP4108796A4 (fr) * 2020-02-17 2023-02-15 Nippon Steel Corporation Tôle d'acier de canette et son procédé de production
CN111394650A (zh) * 2020-03-27 2020-07-10 武汉钢铁有限公司 具有优良成形性的高r值800MPa级冷轧钢及生产方法
CN112647014B (zh) * 2020-11-23 2022-03-22 首钢集团有限公司 一种适用于海洋大气环境用建筑结构钢及其生产方法
JP7533413B2 (ja) 2021-09-29 2024-08-14 Ｊｆｅスチール株式会社 耐疲労き裂伝播特性に優れた鋼板の製造方法
CN114525388A (zh) * 2022-02-21 2022-05-24 刘鑫 一种上贝氏体层状组织钢及其制备方法

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AU2015215080B2 (en) 2019-04-11
CA2936733C (fr) 2019-02-26
WO2015117934A1 (fr) 2015-08-13
MX2016009530A (es) 2016-10-26
RU2016135949A (ru) 2018-03-15
AU2015215080A1 (en) 2016-08-18
US20170081739A1 (en) 2017-03-23
US10724113B2 (en) 2020-07-28
BR112016016949B1 (pt) 2021-03-09
RU2675191C2 (ru) 2018-12-17
EP2905348B1 (fr) 2019-09-04
CA2936733A1 (fr) 2015-08-13

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