EP2855725B1 - Acier lamine a chaud ou a froid a faible densite, son procede de mise en oeuvre et son utilisation - Google Patents

Acier lamine a chaud ou a froid a faible densite, son procede de mise en oeuvre et son utilisation Download PDF

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Publication number
EP2855725B1
EP2855725B1 EP13732225.1A EP13732225A EP2855725B1 EP 2855725 B1 EP2855725 B1 EP 2855725B1 EP 13732225 A EP13732225 A EP 13732225A EP 2855725 B1 EP2855725 B1 EP 2855725B1
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EP
European Patent Office
Prior art keywords
sheet
steel sheet
rolled
temperature
composition
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EP13732225.1A
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German (de)
English (en)
French (fr)
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EP2855725A1 (fr
Inventor
Ian Alberto ZUAZO RODRIGUEZ
Astrid Perlade
Xavier Garat
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ArcelorMittal SA
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ArcelorMittal SA
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    • 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
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/02—Winding-up or coiling
    • 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
    • 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
    • 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
    • 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
    • C21D8/0236—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
    • C21D8/0421—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
    • 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
    • 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
    • C22C38/12—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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
    • C21D2211/001—Austenite
    • 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
    • C21D2211/004—Dispersions; Precipitations
    • 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

Definitions

  • the present invention relates to a rolled steel sheet having a mechanical strength greater than or equal to 600 MPa and an elongation at break greater than or equal to 20% and its manufacturing method.
  • the patent application JP2006118000 is a lightweight steel with high strength and good ductility.
  • the composition of the proposed steel contains in weight percentage: 0.1 to 1.0% C, less than 3.0% Si, 10.0 to 50.0% Mn, less than 0.01 % P, less than 0.01% S, 5.0 to 15.0% Al and 0.001 to 0.05% N, the remainder being iron and unavoidable impurities, equation (1) below in front of be satisfied, the steel will have a density less than or equal to 7.0.
  • the patent application WO2007 / 024092 is intended to provide easily rolled hot-rolled sheet.
  • This application relates to a sheet containing 0.2-1% C, 8-15% Mn, with a product of mechanical strength by elongation of 24000 MPa. It appears that this application is a totally austenitic structure, but this type of microstructure is particularly difficult to roll.
  • One of the aims of the invention is also to provide a method of manufacturing these sheets that is compatible with usual industrial applications while being insensitive to manufacturing conditions.
  • the invention firstly relates to a rolled steel sheet whose density is less than or equal to 7.3 and whose composition comprises, the contents being expressed by weight: 0 , 10 ⁇ VS ⁇ 0 , 30 % 6 , 0 ⁇ mn ⁇ 15 , 0 % 6 , 0 ⁇ al ⁇ 15 , 0 % and optionally, one or more elements selected from: Yes ⁇ 2 , 0 % Ti ⁇ 0 , 2 % V ⁇ 0 , 6 % Nb ⁇ 0 , 3 % the remainder of the composition being composed of iron and unavoidable impurities resulting from the elaboration, the ratio of the weight of manganese to that of aluminum being such that mn al > 1 , 0 , the microstructure of the sheet consisting of ferrite, austenite and up to 5% Kappa precipitates in surface fraction.
  • the composition comprises, the content being expressed by weight: 0 , 18 ⁇ VS ⁇ 0 , 21 %
  • the composition comprises, the content being expressed by weight: 7 , 0 ⁇ mn ⁇ 10 , 0 %
  • the composition comprises, the content being expressed by weight: 6 , 0 ⁇ al ⁇ 12 , 0 %
  • the composition comprises, the content being expressed by weight: 6 , 0 ⁇ al ⁇ 9 , 0 %
  • the composition comprises, the content being expressed by weight: Yes ⁇ 1 %
  • the ratio of the weight of manganese to that of aluminum is such that: mn al ⁇ 1 , 1 , even more preferably, the ratio is such that mn al ⁇ 1 , 5 , even more preferably, the ratio is such that mn al ⁇ 2 , 0.
  • the sheet according to the invention is such that the tensile strength is greater than or equal to 600 MPa and the elongation at break is greater than or equal to 20%.
  • the invention also relates to a method of manufacturing a rolled sheet such that said semi-finished product is cast directly in the form of thin slabs or thin strips.
  • the end of rolling temperature T FL is between 900 and 980 ° C.
  • the cooling rate V ref1 is less than or equal to 55 ° C / s.
  • the winding temperature is between 450 and 550 ° C.
  • the temperature T m is between 800 and 900 ° C.
  • the cooling rate V ref2 is greater than or equal to 30 ° C / s.
  • the cooling rate V ref2 is maintained up to a temperature of between 500 ° C and 460 ° C.
  • the cooled sheet is coated with zinc, a zinc alloy or a zinc-based alloy.
  • the steel sheets according to the invention may be used for the manufacture of structural parts or skin parts for motorized land vehicles.
  • the present invention relates to hot-rolled or cold-rolled steel sheets having a reduced density relative to conventional steels and less than or equal to 7.3, while retaining mechanical properties of shaping, of mechanical strength. , weldability and satisfactory coating.
  • the invention also relates to a manufacturing method for hot or cold rolling the steel of the invention to obtain a hot or cold sheet having a microstructure comprising ferrite, austenite and up to to 5% of Kappa precipitates in surface fraction.
  • the surface density of the Kappa precipitates can be up to 5% because above 5%, the ductility drops and the 20% breaking elongation of the invention is not reached.
  • less than 2% Kappa precipitates are contemplated. It is specified that the microstructure being uniform, the surface fraction is equal to the volume fraction.
  • the reheating temperature is between 1150 and 1280 ° C.
  • composition of the steels shown in Table 1 consists of iron and unavoidable impurities resulting from processing.
  • the sheets I1 and I2 are sheets whose chemical composition and the method of implementation are according to the invention.
  • the two chemical compositions are different and have different Mn / Al ratios.
  • the sheets referenced R1, R2 and R3 have chemical compositions which do not satisfy the conditions according to the invention respectively for the content of Mn, for the contents of C and Mn or for the Mn / Al ratio.
  • R2a and R2b are two tests from the same grade R2 in Table 1.
  • the hot rolling was carried out with at least one rolling pass in the presence of ferrite.
  • Air cooling has a cooling rate of less than 55 ° C / sec.
  • the two steel sheets I1 and I2 correspond to the sheets according to the invention.
  • the microstructure of the sheet I1 is illustrated by the figure 1 . None of these sheets has crack after rolling.
  • the mechanical strengths are greater than 600 MPa, their elongation at break is well above 20% and they are weldable and can be coated.
  • the presence of ferrite and austenite was confirmed by a scanning electron microscope and the presence of Kappa precipitates was confirmed by the indexing of the diffraction pattern. obtained after observation with a transmission electron microscope (cf. figure 6 ).
  • the sheet R1 has an Mn content of less than 6%, an Mn / Al ratio of less than 1 and a reheat temperature of greater than 1280 ° C.
  • the letter "X" means that there has been no traction test.
  • the sheets R2a and R2b come from the sheet R2 and have an Mn / Al ratio of less than 1 and a manganese content of less than 6%.
  • R2a was coiled at a temperature above 600 ° C which led to a decomposition of the austenite into Kappa and ferrite as illustrated by the figure 4 . The lengthening does not reach the necessary 20%.
  • the sheet R2b has undergone rolling conditions according to the invention but the chemical composition does not satisfy the conditions referred to, that is to say that the Mn / Al ratio is below 1, the elongation of 20% n is not reached.
  • Sheet R3 has an Mn / Al ratio of less than 1.0; despite rolling conditions according to the invention and alloying elements in the ranges covered by the invention, cracks appeared during hot rolling.
  • Example 2 Cold-rolled and annealed sheets
  • composition of the steels in Table 4 consists of iron and unavoidable impurities resulting from processing.
  • Table 4: Composition of steel (% weight) .I invention VS mn al Yes Ti V Nb Mn / Al Density measured by pycnometry I3 0.21 8.2 7.4 0.26 ⁇ 0.030 ⁇ 0.030 ⁇ 0.030 1.11 7.04 I4 0.21 8.6 6.1 0 ⁇ 0.030 ⁇ 0.030 ⁇ 0.030 1.41 7.17 I5 0.2 8.6 6.1 0.89 ⁇ 0.030 ⁇ 0.030 0.1 1.41 7.12 I6 0.19 8.7 7.2 0 ⁇ 0.030 ⁇ 0.030 ⁇ 0.030 1.21 not measured
  • the density of I6 was estimated at 7.1 thanks to the curve of the figure 8 .
  • the sheets I3a, I3b, I4, I5 and I6 are sheets whose chemical composition and the method of implementation are according to the invention.
  • the cold-rolled steel sheets of Table 7 correspond to sheets according to the invention.
  • the microstructure of the sheet I3a is illustrated by the figure 5 . None of these sheets has crack after rolling.
  • the mechanical strengths are greater than 600 MPa, their elongation at break is greater than 20% and they are weldable and the I3a sheet was coated with Zn by a quenching process in a Zn bath at 460 ° C, called the galvanizing process by soaking.
  • the sheet, both bare and coated, has good weldability.
  • the steels according to the invention thus have good continuous galvanizing properties, in particular.
  • the steels according to the invention have a good combination of properties of interest for structural or skin parts in the automobile (low density, good deformability, good mechanical properties, good weldability and good resistance to corrosion with coating).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials 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)
  • Parts Printed On Printed Circuit Boards (AREA)
EP13732225.1A 2012-05-31 2013-05-27 Acier lamine a chaud ou a froid a faible densite, son procede de mise en oeuvre et son utilisation Active EP2855725B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/FR2012/000220 WO2013178887A1 (fr) 2012-05-31 2012-05-31 Acier laminé a chaud ou a froid a faible densite, son procede de mise en oeuvre et son utilisation
PCT/IB2013/001057 WO2013179115A1 (fr) 2012-05-31 2013-05-27 Acier lamine a chaud ou a froid a faible densite, son procede de mise en oeuvre et son utilisation

Publications (2)

Publication Number Publication Date
EP2855725A1 EP2855725A1 (fr) 2015-04-08
EP2855725B1 true EP2855725B1 (fr) 2016-07-06

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EP13732225.1A Active EP2855725B1 (fr) 2012-05-31 2013-05-27 Acier lamine a chaud ou a froid a faible densite, son procede de mise en oeuvre et son utilisation

Country Status (17)

Country Link
US (1) US10900105B2 (ru)
EP (1) EP2855725B1 (ru)
JP (2) JP6074031B2 (ru)
KR (3) KR20160129916A (ru)
CN (1) CN104350169B (ru)
BR (1) BR112014029177B1 (ru)
CA (1) CA2873578C (ru)
ES (1) ES2594328T3 (ru)
HU (1) HUE028856T2 (ru)
IN (1) IN2014DN09576A (ru)
MA (1) MA37508B1 (ru)
MX (1) MX359361B (ru)
PL (1) PL2855725T3 (ru)
RU (1) RU2614491C2 (ru)
UA (1) UA111285C2 (ru)
WO (2) WO2013178887A1 (ru)
ZA (1) ZA201408109B (ru)

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CN104928568B (zh) * 2015-06-30 2017-07-28 宝山钢铁股份有限公司 一种铁素体低密度高强钢及其制造方法
CN104928456B (zh) * 2015-06-30 2017-08-25 宝山钢铁股份有限公司 一种提高普冷铁素体轻质钢延展性的制造方法
WO2017203315A1 (en) * 2016-05-24 2017-11-30 Arcelormittal Cold rolled and annealed steel sheet, method of production thereof and use of such steel to produce vehicle parts
CN106011653B (zh) * 2016-07-05 2018-02-06 东北大学 高强度高韧性低密度钢及其制造方法
CN106756571A (zh) * 2016-11-18 2017-05-31 扶绥县科学技术情报研究所 超细晶粒的高强度钢铁材料生产方法
CN106756570A (zh) * 2016-11-18 2017-05-31 扶绥县科学技术情报研究所 超细晶粒的高韧性钢铁材料生产方法
CN106636915A (zh) * 2016-11-18 2017-05-10 扶绥县科学技术情报研究所 改善钢铁材料力学性质的生产方法
CN106756569A (zh) * 2016-11-18 2017-05-31 扶绥县科学技术情报研究所 提高钢铁材料强度的生产方法
CN106399841B (zh) * 2016-11-18 2018-07-03 扶绥县科学技术情报研究所 超细晶粒的强耐蚀钢铁材料生产方法
CN106756478B (zh) * 2016-12-07 2018-03-27 钢铁研究总院 一种经济型耐海水腐蚀用低密度低合金钢及其制备方法
EP3559297A1 (en) * 2016-12-22 2019-10-30 ArcelorMittal Cold rolled and heat treated steel sheet, method of production thereof and use of such steel to produce vehicle parts
WO2019122960A1 (en) 2017-12-19 2019-06-27 Arcelormittal Cold rolled and heat treated steel sheet, method of production thereof and use of such steel to produce vehicle parts
CN109694997B (zh) * 2019-02-25 2021-08-06 上海大学 利用γ→α同素异构转变提升Fe-Mn-Al-C双相钢力学性能的热处理工艺
CN110592487B (zh) * 2019-10-22 2021-12-10 成都先进金属材料产业技术研究院股份有限公司 700MPa级奥氏体铁素体双相低密度铸钢及其制备方法
KR102415068B1 (ko) * 2020-09-07 2022-06-29 주식회사 포스코 고강도 저비중 강판 및 그 제조 방법
MX2024007034A (es) * 2021-12-10 2024-06-19 Arcelormittal Acero laminado en caliente de baja densidad, metodo de produccion del mismo y uso de tal acero para producir piezas de vehiculos.
CN115537660B (zh) * 2022-09-30 2023-07-14 武汉钢铁有限公司 一种低密度高强度热轧弹簧扁钢及其生产方法

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JP5403660B2 (ja) * 2009-03-09 2014-01-29 本田技研工業株式会社 高強度鋼板およびその製造方法

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ZA201408109B (en) 2015-11-25
KR20170053727A (ko) 2017-05-16
MX2014014613A (es) 2015-08-10
CN104350169B (zh) 2017-02-22
KR20160129916A (ko) 2016-11-09
JP6074031B2 (ja) 2017-02-01
US10900105B2 (en) 2021-01-26
RU2614491C2 (ru) 2017-03-28
MA37508B1 (fr) 2016-03-31
JP2017106108A (ja) 2017-06-15
CN104350169A (zh) 2015-02-11
JP2015520298A (ja) 2015-07-16
WO2013179115A8 (fr) 2014-11-06
ES2594328T3 (es) 2016-12-19
WO2013179115A1 (fr) 2013-12-05
BR112014029177B1 (pt) 2019-03-26
MX359361B (es) 2018-09-26
RU2014153550A (ru) 2016-07-20
IN2014DN09576A (ru) 2015-07-17
BR112014029177A2 (pt) 2017-06-27
JP6242990B2 (ja) 2017-12-06
KR20150003918A (ko) 2015-01-09
US20150147221A1 (en) 2015-05-28
UA111285C2 (uk) 2016-04-11
MA20150361A1 (fr) 2015-10-30
WO2013178887A1 (fr) 2013-12-05
PL2855725T3 (pl) 2016-12-30
HUE028856T2 (en) 2017-01-30
EP2855725A1 (fr) 2015-04-08
CA2873578C (fr) 2017-10-10
CA2873578A1 (fr) 2013-12-05

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