MX2021006649A - Lamina de acero de alta resistencia que tiene excelente moldeabilidad y resistencia al impacto, y metodo para fabricar lamina de acero de alta resistencia que tiene excelente moldeabilidad y resistencia al impacto. - Google Patents

Lamina de acero de alta resistencia que tiene excelente moldeabilidad y resistencia al impacto, y metodo para fabricar lamina de acero de alta resistencia que tiene excelente moldeabilidad y resistencia al impacto.

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Publication number
MX2021006649A
MX2021006649A MX2021006649A MX2021006649A MX2021006649A MX 2021006649 A MX2021006649 A MX 2021006649A MX 2021006649 A MX2021006649 A MX 2021006649A MX 2021006649 A MX2021006649 A MX 2021006649A MX 2021006649 A MX2021006649 A MX 2021006649A
Authority
MX
Mexico
Prior art keywords
less
steel sheet
impact resistance
strength steel
excellent moldability
Prior art date
Application number
MX2021006649A
Other languages
English (en)
Inventor
Kohichi Sano
Hiroyuki Kawata
Eisaku Sakurada
Takafumi Yokoyama
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of MX2021006649A publication Critical patent/MX2021006649A/es

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    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
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    • C21—METALLURGY OF IRON
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    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
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    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/185—Hardening; Quenching with or without subsequent tempering from an intercritical temperature
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    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
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    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
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    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
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    • C21D8/0268—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment between cold rolling steps
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    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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    • C—CHEMISTRY; METALLURGY
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    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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    • C21D2211/00—Microstructure comprising significant phases
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Abstract

Una lámina de acero de alta resistencia incluye una composición química que incluye: en % en masa, C: 0.080 a 0.500%, Si: 2.50% o menos, Mn: 0.50 a 5.00%, P: 0.100% o menos, S: 0.0100% o menos, Al: 0.001 a 2.500%, N: 0.0150% o menos, O: 0.0050% o menos, y el resto: Fe e impurezas inevitables. La lámina de acero de alta resistencia que satisface una fórmula predeterminada tiene una microestructura en una región de 1/8t a 3/8t desde la superficie de la lámina de acero. La microestructura incluye: en % en volumen, 20% o más de ferrita acicular, 20% o más de una estructura dura en forma de isla que incluye austenita residual, 2% a 25% de austenita residual y 20% o menos de ferrita agregada. En la estructura dura con forma de isla, una relación de aspecto promedio de una región dura que tiene un diámetro circular equivalente de 1.5 µm o más es de 2.0 o más, una relación de aspecto promedio de una región dura que tiene un diámetro circular equivalente de menos de 1.5 µm es menor que 2.0, un promedio de una densidad numérica de la región dura que tiene un diámetro circular equivalente de menos de 1.5 µm es igual o mayor que 1.0 × 1010 piezas·m-2.y una relación entre una densidad numérica máxima y una densidad numérica mínima es 2.5 o menos.
MX2021006649A 2018-12-11 2018-12-11 Lamina de acero de alta resistencia que tiene excelente moldeabilidad y resistencia al impacto, y metodo para fabricar lamina de acero de alta resistencia que tiene excelente moldeabilidad y resistencia al impacto. MX2021006649A (es)

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