Search International and National Patent Collections

1. (WO2018163871) HIGH-STRENGTH HOT-ROLLED PLATED STEEL SHEET

Pub. No.:    WO/2018/163871    International Application No.:    PCT/JP2018/006847
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Tue Feb 27 00:59:59 CET 2018
IPC: C22C 38/00
C22C 38/14
C22C 38/38
C21D 9/46
Applicants: JFE STEEL CORPORATION
JFEスチール株式会社
Inventors: GOTO Sota
後藤 聡太
YAMAZAKI Kazuhiko
山崎 和彦
KIZU Taro
木津 太郎
TOYODA Shunsuke
豊田 俊介
Title: HIGH-STRENGTH HOT-ROLLED PLATED STEEL SHEET
Abstract:
Provided is a high-strength hot-rolled plated steel sheet having excellent forming properties. The present invention has a component composition containing, in terms of mass%, 0.03-0.15% C, 0.4% or less of Si, 1.2-1.9% Mn, 0.05-0.25% Ti, 0.0005-0.0050% B, 0.03% or less of P, 0.005% or less of S, 0.005-0.4% Al, and 0.01% or less of N, the remainder comprising Fe and unavoidable impurities, and has a structure in which the total area ratio of ferrite and/or tempering bainite is 90% or greater, and the volume fraction of Ti carbide having a particle diameter of 20 nm or less is 0.05 vol% or greater.