MX2020006763A - Lamina de acero de alta resistencia y metodo para la produccion de la misma. - Google Patents

Lamina de acero de alta resistencia y metodo para la produccion de la misma.

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Publication number
MX2020006763A
MX2020006763A MX2020006763A MX2020006763A MX2020006763A MX 2020006763 A MX2020006763 A MX 2020006763A MX 2020006763 A MX2020006763 A MX 2020006763A MX 2020006763 A MX2020006763 A MX 2020006763A MX 2020006763 A MX2020006763 A MX 2020006763A
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Mexico
Prior art keywords
steel sheet
less
area fraction
strength steel
martensite
Prior art date
Application number
MX2020006763A
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English (en)
Inventor
Tatsuya Nakagaito
Hidekazu Minami
Hiroshi Hasegawa
Kana SASAKI
Shoji Tanaka
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 MX2020006763A publication Critical patent/MX2020006763A/es

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    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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    • 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
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    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
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  • Heat Treatment Of Sheet Steel (AREA)

Abstract

Un objetivo de la presente invención es proporcionar una lámina de acero de alta resistencia aún más excelente tanto en resistencia como en manejabilidad y un método para la producción de la lámina de acero de alta resistencia. La lámina de acero de alta resistencia de conformidad con la presente invención tiene una composición específica y una microestructura que incluye bainita inferior, martensita, austenita retenida, bainita superior, y ferrita de tal manera que la fracción de área total de la bainita inferior, la martensita, y la austenita retenida es de 40% a 100%, la fracción de área de la austenita retenida es de 15% o menos, y la fracción de área total de la bainita superior y la ferrita es de 0% a 60%. En la microestructura, la fracción de área de granos de fase de ferrita alargada que tienen una relación de aspecto de 3 o más es de 1% o menos, el tamaño promedio de grano de cristal de martensita incluida en una región que se extiende 50 µm desde una superficie de la lámina de acero es de 20 µm o menos, el contenido de partículas de óxido que tienen una longitud de eje menor de 0.8 µm o menos en la región que se extiende 50 µm desde la superficie de la lámina de acero es de 1.0 × 1010 partículas/m2 o más, y el contenido de partículas gruesas de óxido que tienen una longitud de eje menor de más de 1 µm en la región que se extiende 50 µm desde la superficie de la lámina de acero es de 1.0 × 108 partículas/m2 o menos. El contenido de hidrógeno atrapado en la lámina de acero es de 0.05 ppm en masa o más.
MX2020006763A 2017-12-27 2018-10-09 Lamina de acero de alta resistencia y metodo para la produccion de la misma. MX2020006763A (es)

Applications Claiming Priority (2)

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