公开(公告)号：EP3530768A1

公开(公告)日：2019-08-28

申请号：EP16919237.4

申请日：2016-10-19

申请人： NIPPON STEEL CORPORATION

发明人： HAGA, Jun ,  SANO, Kohichi ,  HAYASHI, Koutarou ,  HAYASHI, Kunio ,  KAMEDA, Masaharu ,  UENISHI, Akihiro ,  KAWATA, Hiroyuki

IPC分类号： C22C38/00 ,  C21D9/46 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28

摘要： In a metal coated steel sheet, a chemical composition contains, in mass%, at least C: 0.03% to 0.70%, Si: 0.25% to 2.50%, Mn: 1.00% to 5.00%, P: 0.100% or less, S: 0.010% or less, sol. Al: 0.001% to 2.500, N: 0.020% or less, and a balance composed of iron and impurities, a metal structure contains greater than 5.0 vol% of retained austenite and greater than 5.0 vol% of tempered martensite, and satisfies a C content in the retained austenite being 0.85 mass% or more.

公开(公告)号：EP2508640A1

公开(公告)日：2012-10-10

申请号：EP10833432.7

申请日：2010-11-30

申请人： Nippon Steel Corporation

发明人： AZUMA, Masafumi ,  SUZUKI, Noriyuki ,  MARUYAMA, Naoki ,  MURASATO, Akinobu ,  SAKUMA, Yasuharu ,  KAWATA, Hiroyuki ,  WAKABAYASHI, Chisato

IPC分类号： C22C38/06 ,  C22C38/58 ,  C21D9/46 ,  C23C2/06 ,  C23C2/28 ,  C25D5/26

CPC分类号： C23C2/06 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/28 ,  C23C2/40 ,  C25D5/36

摘要： High strength steel plate with an ultimate tensile strength of 900 MPa or more which is excellent in hydrogen embrittlement resistance characterized in that, in the structure of the steel plate, (a)by volume fraction, ferrite is present in 10 to 50%, bainitic ferrite and/or bainite in 10 to 60%, and tempered martensite in 10 to 50%, and (b) iron-based carbides which contain Si or Si and Al in 0.1% or more are present in 4×10 8 (particles/mm 3 ) or more.

摘要翻译： 高强度钢板具有在900MPa以上所有的极限拉伸强度优异，在该特征的耐氢脆化特性，在钢板的结构中，（a）以体积分数计，铁素体是存在于10至50％，贝氏体 铁素体和/或在10至60％的贝氏体和回火马氏体，10〜50％，和（b）铁系碳化物而含有Si或Si和Al在0.1％以上存在（在4×10 8个粒子/ 毫米3）以上。