MX2022015467A - Lamina de acero y metodo para fabricar lamina de acero. - Google Patents

Lamina de acero y metodo para fabricar lamina de acero.

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Publication number
MX2022015467A
MX2022015467A MX2022015467A MX2022015467A MX2022015467A MX 2022015467 A MX2022015467 A MX 2022015467A MX 2022015467 A MX2022015467 A MX 2022015467A MX 2022015467 A MX2022015467 A MX 2022015467A MX 2022015467 A MX2022015467 A MX 2022015467A
Authority
MX
Mexico
Prior art keywords
steel plate
sup
plate thickness
thickness position
manufacturing
Prior art date
Application number
MX2022015467A
Other languages
English (en)
Inventor
Kengo Takeda
Arisa IKEDA
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 MX2022015467A publication Critical patent/MX2022015467A/es

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    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • 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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    • 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
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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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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    • C21D8/0273—Final recrystallisation annealing
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  • Chemical & Material Sciences (AREA)
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  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

En una lámina de acero de acuerdo con la presente modalidad, un contenido de Ti y un contenido de N satisfacen Ti - 3.5 × N = 0.003, en una posición de 1/4 del espesor de la lámina, una estructura metalográfica incluye 90% o más de martensita en términos de fracción de volumen, en la posición de 1/4 del espesor de la lámina, una densidad numérica del TiC que tiene un diámetro equivalente de círculo de 1 a 500 nm es 3.5 x 104 partículas/mm2 o más, en la posición de 1/4 del espesor de la lámina, un valor de un valor de la mediana de una concentración de Mn + 3s es 5.00% o menos, y una dureza medida en la posición de 1/4 del espesor de la lámina es 1.30 veces o más una dureza medida en una posición a 50 µm de profundidad desde la superficie de la lámina de acero.
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