MX2020009987A - Lamina de acero y metodo para fabricar la misma. - Google Patents

Lamina de acero y metodo para fabricar la misma.

Info

Publication number
MX2020009987A
MX2020009987A MX2020009987A MX2020009987A MX2020009987A MX 2020009987 A MX2020009987 A MX 2020009987A MX 2020009987 A MX2020009987 A MX 2020009987A MX 2020009987 A MX2020009987 A MX 2020009987A MX 2020009987 A MX2020009987 A MX 2020009987A
Authority
MX
Mexico
Prior art keywords
steel sheet
residual austenite
volume fraction
î1⁄4m
interior
Prior art date
Application number
MX2020009987A
Other languages
English (en)
Inventor
Riki Okamoto
Kohichi Sano
Hiroyuki Kawata
Satoshi Uchida
Kohei Ueda
Eisaku Sakurada
Takafumi Yokoyama
Masahiro Nakata
Yuji Yamaguchi
Kazuki Shiokawa
Yuichi Nakahira
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 MX2020009987A publication Critical patent/MX2020009987A/es

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    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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    • C21D8/0236—Cold rolling
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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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Abstract

Una lámina de acero según un aspecto de la presente invención tiene una composición química predeterminada, en la que una estructura de acero de un interior de la lámina de acero contiene, por fracción de volumen, ferrita blanda: 0% a 30%, austenita retenida: 3% a 40%, martensita fresca: 0% a 30%, una suma de perlita y cementita: 0% a 10%, y un resto que incluye ferrita dura, en el interior de la lámina de acero, una proporción numérica de la austenita retenida que tiene una relación de aspecto de 2.0 o más en el total de la austenita retenida es del 50% o más, una capa blanda que tiene un espesor de 1 µm a 100 µm de la superficie está presente en una dirección de espesor de la lámina, entre la ferrita contenida en la capa blanda, una fracción de volumen de granos que tiene una relación de aspecto de menos de 3.0 es el 50% o más, una fracción de volumen de austenita retenida en la capa blanda es el 50% o más de la fracción de volumen de la austenita retenida del interior de la lámina de acero, y un pico de una intensidad de emisión a una longitud de onda que indica si aparece en un rango de más de 0.2 µm desde la superficie a 5 µm o menos desde la superficie.
MX2020009987A 2018-03-30 2018-03-30 Lamina de acero y metodo para fabricar la misma. MX2020009987A (es)

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US20210095356A1 (en) 2021-04-01
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