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1. (WO2018055687) STEEL PLATE

Pub. No.:    WO/2018/055687    International Application No.:    PCT/JP2016/077801
Publication Date: Fri Mar 30 01:59:59 CEST 2018 International Filing Date: Thu Sep 22 01:59:59 CEST 2016
IPC: C22C 38/00
C21D 9/46
C22C 38/06
C22C 38/58
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION
新日鐵住金株式会社
Inventors: SANO Kohichi
佐野 幸一
AZUMA Masafumi
東 昌史
SAKAKIBARA Mutsumi
榊原 睦海
UENISHI Akihiro
上西 朗弘
HAYASHI Koutarou
林 宏太郎
Title: STEEL PLATE
Abstract:
The steel plate pertaining to an embodiment of the present invention contains a predetermined chemical component, the metallographic structure in a 1/4t part includes 4-70% by volume of residual austenite, [Mn]γ/[Mn]ave > 1.5 in the 1/4t part, and fγs/fγ ≤ 0.30 and [C] × [Mn] ≥ 0.15 in the 1/4t part.