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1. WO2021039499 - LOW-STRENGTH STEEL SHEET FOR HOT STAMPING, HOT-STAMPED COMPONENT, AND METHOD FOR MANUFACTURING HOT-STAMPED COMPONENT

Publication Number WO/2021/039499
Publication Date 04.03.2021
International Application No. PCT/JP2020/031118
International Filing Date 18.08.2020
IPC
C21D 9/00 2006.01
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
C21D 9/46 2006.01
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
46for sheet metals
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/06 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
C22C 38/14 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
14containing titanium or zirconium
C21D 1/18 2006.01
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
18Hardening; Quenching with or without subsequent tempering
CPC
C21D 1/18
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
18Hardening
C21D 9/00
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
C21D 9/46
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING 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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
46for sheet metals
C22C 38/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/06
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
C22C 38/14
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
14containing titanium or zirconium
Applicants
  • 株式会社神戸製鋼所 KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) [JP]/[JP]
Inventors
  • 濱本 紗江 HAMAMOTO, Sae
  • 浅井 達也 ASAI, Tatsuya
Agents
  • 小谷 昌崇 KOTANI, Masataka
  • 小谷 悦司 KOTANI, Etsuji
  • 宇佐美 綾 USAMI, Aya
Priority Data
2019-15472727.08.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) LOW-STRENGTH STEEL SHEET FOR HOT STAMPING, HOT-STAMPED COMPONENT, AND METHOD FOR MANUFACTURING HOT-STAMPED COMPONENT
(FR) TÔLE D'ACIER À FAIBLE RÉSISTANCE POUR ESTAMPAGE À CHAUD, COMPOSANT ESTAMPÉ À CHAUD, ET PROCÉDÉ DE FABRICATION D'UN COMPOSANT ESTAMPÉ À CHAUD
(JA) 低強度ホットスタンプ用鋼板、ホットスタンプ部品およびホットスタンプ部品の製造方法
Abstract
(EN)
A low-strength steel sheet for hot stamping according to an aspect of the present invention satisfies a prescribed chemical composition, the Ac3 point (°C) thereof indicated by formula (1) being 890°C or higher, and the area ratio of ferrite at a depth that is 1/4 of the thickness of the steel sheet being 80% or greater. Formula (1): Ac3 point (°C) = 910 – 203 × [C]1/2 + 44.7 × [Si] – 30 × [Mn] + 700 × [P] + 400 × [Al] + 400 × [Ti]. In formula (1), [C], [Si], [Mn], [P], [Al], and [Ti] are values representing the content ratios of C, Si, Mn, P, Al, and Ti, respectively, in terms of mass%.
(FR)
Un aspect de la présente invention concerne une tôle d'acier à faible résistance pour estampage à chaud satisfaisant une composition chimique prescrite, le point Ac3 (°C) représenté par la formule (1) étant de 890 °C ou plus, et le rapport de surface de la ferrite à une profondeur qui est de 1/4 de l'épaisseur de la feuille d'acier étant de 80 % ou plus. Formule (1) : point Ac3 (°C) = 910 – 203 × [C]1/2 + 44,7 × [Si] – 30 × [Mn] + 700 × [P] + 400 × [Al] + 400 × [Ti]. Dans la formule (1), [C], [Si], [Mn], [P], [Al] et [Ti] sont des valeurs représentant les rapports de teneur en C, Si, Mn, P, Al et Ti, respectivement, en termes de % en masse.
(JA)
本発明の一局面に係る低強度ホットスタンプ用鋼板は、鋼板が、所定の化学成分組成を満たし、下記式(1)で示されるAc3点(℃)が890℃以上であり、且つ鋼板厚さの1/4の深さにおけるフェライトの面積率が80%以上である。 Ac3点(℃)=910-203×[C]1/2+44.7×[Si]-30×[Mn]+700×[P]+400×[Al]+400×[Ti]・・・(1) 上記式(1)中、[C]、[Si]、[Mn]、[P]、[Al]、[Ti]は、それぞれC、Si、Mn、P、Al、Tiの含有率を質量%で表した値である。
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