公开(公告)号：EP2876178B1

公开(公告)日：2020-09-16

申请号：EP13819269.5

申请日：2013-07-22

申请人： Nippon Steel Corporation

发明人： KAWANO, Kaori ,  TASAKA, Masahito ,  NAKAZAWA, Yoshiaki ,  TANAKA, Yasuaki ,  TOMIDA, Toshiro

IPC分类号： C22C38/00 ,  B21B3/02 ,  C21D9/46 ,  C22C38/14 ,  C22C38/38 ,  C21D8/02 ,  C21D1/32 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/22 ,  C22C38/24 ,  C22C38/28 ,  C22C38/34

公开(公告)号：EP4134464A1

公开(公告)日：2023-02-15

申请号：EP21785098.1

申请日：2021-03-30

申请人： NIPPON STEEL CORPORATION

发明人： TANAKA, Yasuaki ,  NIKAIDO, Hitoshi ,  KAWATA, Hiroyuki ,  SUGIURA, Natsuko

IPC分类号： C22C38/00 ,  C21D9/46 ,  C21D9/48 ,  C22C38/60

摘要： There is provided a steel sheet including a chemical composition consisting of, in mass%: C: 0.03 to 0.25%, Si: 0.1 to 2.0%, Mn: 1.0 to 3.0%, P: 0.200% or less, S: 0.0500% or less, Al: 0.01 to 1.00%, N: 0.0100% or less, and Ti: 0.01 to 0.25%, with the balance: Fe and impurities, and a steel micro-structure containing, in area%: ferrite: 50 to 85%, the balance being one or more kinds selected from martensite, bainite, and retained austenite, and an intensity of γ-fiber is more than 4.0 times in terms of random intensity ratio, and an average KAM value of grains having crystal orientations that form angles within 10° from γ-fiber is 1.30° or less.

公开(公告)号：EP4303334A1

公开(公告)日：2024-01-10

申请号：EP22763047.2

申请日：2022-02-22

申请人： NIPPON STEEL CORPORATION

发明人： TANAKA, Yasuaki ,  YABU, Shohei ,  SHUTO, Hiroshi ,  HAYASHI, Koutarou ,  YASUTOMI, Takashi ,  SAKURADA, Eisaku

IPC分类号： C22C38/00 ,  C22C38/60 ,  C21D9/46

摘要： There is provided a steel sheet having a chemical composition comprising, in mass%, C: 0.05 to 0.25%, Si: 0.2 to 2.0%, Mn: 1.2 to 3.0%, P: 0.030% or less, S: 0.050% or less, Al: 0.01 to 0.55%, N: 0.0100% or less, and Ti: 0.010 to 0.250%, with the balance: Fe and impurities, wherein a random intensity ratio of a texture in a near-surface portion of the steel sheet is 8.0 or less, and a minimum angle formed between a maximum strength orientation in a { 110} pole figure of the texture and a normal direction of a rolled surface of the steel sheet is 10° or less.