MX2022004360A - Lamina de acero de alta resistencia, elemento de absorcion de impactos y metodo para fabricar la lamina de acero de alta resistencia. - Google Patents

Lamina de acero de alta resistencia, elemento de absorcion de impactos y metodo para fabricar la lamina de acero de alta resistencia.

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Publication number
MX2022004360A
MX2022004360A MX2022004360A MX2022004360A MX2022004360A MX 2022004360 A MX2022004360 A MX 2022004360A MX 2022004360 A MX2022004360 A MX 2022004360A MX 2022004360 A MX2022004360 A MX 2022004360A MX 2022004360 A MX2022004360 A MX 2022004360A
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Mexico
Prior art keywords
retained austenite
steel sheet
strength steel
less
strength
Prior art date
Application number
MX2022004360A
Other languages
English (en)
Inventor
Yuki Toji
Yoshiyasu Kawasaki
Yoshimasa Funakawa
Muneka IWASAWA
Original Assignee
Jfe 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 Jfe Steel Corp filed Critical Jfe Steel Corp
Publication of MX2022004360A publication Critical patent/MX2022004360A/es

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    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Electrochemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Coating With Molten Metal (AREA)

Abstract

Los objetivos son proporcionar una lámina de acero de alta resistencia y un elemento de absorción de energía de choque que tengan un límite de alargamiento (YP-EL) de 1.0% o más y una resistencia a la tracción (TS) de 980 MPa o mayor y que también tengan una excelente ductilidad uniforme, plegabilidad, rendimiento de compresión y proporcionar un método para fabricar la lámina de acero de alta resistencia. Una lámina de acero de alta resistencia tiene un límite de alargamiento (YP-EL) del 1.0% o más y una resistencia a la tracción (TS) de 980 MPa o superior. La lámina de acero de alta resistencia tiene una composición química específica. La lámina de acero de alta resistencia tiene una microestructura en la que la ferrita esté presente en una fracción de área del 30.0% o más y menos del 80.0%, la martensita esté presente en una fracción de área del 3.0% o más y del 30.0% o menos, la austenita retenida esté presente en una fracción de volumen del 12.0% o más, la ferrita tenga un tamaño promedio de grano de 5.0 µm o menos, la austenita retenida tenga un tamaño promedio de grano de 2.0 µm o menos, un valor obtenido al dividir un contenido de Mn (% en masa) de la austenita retenida entre un contenido de Mn (% en masa) de acero es 1.50 o superior, el 15% o más de todos los granos de austenita retenidos en la austenita retenida tengan una relación de aspecto de 3.0 o superior, y el 15% o más de todos los granos de austenita retenidos en la austenita retenida tengan una relación de aspecto inferior a 2.0, en donde un valor obtenido al dividir una fracción de volumen V?a entre una fracción de volumen V?b es 0.40 o mayor, donde la fracción de volumen V?a es una fracción de volumen de austenita retenida en una porción fracturada de una muestra de prueba de tracción después de una prueba de tracción en caliente a 150°C, y la fracción de volumen V?b es una fracción de volumen de austenita retenida antes de la prueba de tracción en caliente a 150°C.
MX2022004360A 2019-10-11 2020-09-25 Lamina de acero de alta resistencia, elemento de absorcion de impactos y metodo para fabricar la lamina de acero de alta resistencia. MX2022004360A (es)

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PCT/JP2020/036363 WO2021070640A1 (ja) 2019-10-11 2020-09-25 高強度鋼板および衝撃吸収部材ならびに高強度鋼板の製造方法

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EP4043594A1 (en) 2022-08-17
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CN114585759A (zh) 2022-06-03
JPWO2021070640A1 (ja) 2021-10-21
CN114585759B (zh) 2023-04-07
EP4043594B1 (en) 2024-05-22
JP6950849B2 (ja) 2021-10-13
US20240052464A1 (en) 2024-02-15

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