专利检索 ap:("NIPPON STEEL & SUMITOMO METAL CORP") AND inv:"YOSHINAGA NAOKI" 第 1 页

1.

发明公开
STEEL SHEET AND PROCESS FOR PRODUCING STEEL SHEET 有权
标题翻译： STAHLPLATTE UND VERFAHREN ZUR HERSTELLUNG DER STAHLPLATTE

公开(公告)号：EP2530180A4

公开(公告)日：2017-06-28

申请号：EP11737199

申请日：2011-01-31

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： OKAMOTO RIKI , SUGIURA NATSUKO , SANO KOHICHI , WAKABAYASHI CHISATO , YOSHINAGA NAOKI , KAWASAKI KAORU

IPC分类号： C22C38/06 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/58 , C23C2/02 , C23C2/06 , C23C2/28

CPC分类号： C23C2/28 , C21D8/0226 , C21D8/0236 , C21D8/0247 , C21D8/0263 , C21D9/46 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/16 , C23C2/02 , C23C2/06

摘要： A steel sheet is provided, including: as chemical components, by mass%, 0.05% to 0.35% of C; 0.05% to 2.0% of Si; 0.8% to 3.0% of Mn; 0.01% to 2.0% of Al; equal to or less than 0. 2% of P; equal to or less than 0.05% of S; equal to or less than 0.01% ofN; and the balance including iron and inevitable impurities, wherein an area ratio of equal to or higher than 50% of a total of a ferrite phase, a bainite phase, and a tempered martensite phase is contained, an area ratio of equal to or higher than 3% of a retained austenite phase is contained, and crystal grains of the retained austenite phase having a number ratio of equal to or higher than 50% satisfy Expression 1, assuming that a carbon concentration at a position of center of gravity is Cgc and a carbon concentration at a grain boundary is Cgb.

摘要翻译： 本发明提供一种钢板，其特征在于，以质量％计含有C：0.05〜0.35％的化学成分; ，Si：0.05〜2.0％ Mn：0.8〜3.0％ Al：0.01〜2.0％等于或小于0. 2％的P; 等于或小于S的0.05％; 等于或小于N的0.01％; 以及余量由铁和不可避免的杂质构成，其中，包含铁素体相，贝氏体相和回火马氏体相的合计50％以上的面积率，等于或高于含有3％的残余奥氏体相，并且具有等于或大于50％的数量比的残余奥氏体相的晶粒满足表达式1，假定在重心位置处的碳浓度是Cgc和晶界碳浓度为Cgb。

2.

发明公开
HIGH-STRENGTH COLD-ROLLED STEEL SHEET, AND PROCESS FOR PRODUCTION THEREOF 有权
标题翻译： HOCHFESTES KALTGEWALZTES STAHLBLECH UND HERSTELLUNGSVERFAHRENDAFÜR

公开(公告)号：EP2530179A4

公开(公告)日：2017-05-24

申请号：EP11737032

申请日：2011-01-26

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： SANO KOHICHI , WAKABAYASHI CHISATO , KAWATA HIROYUKI , OKAMOTO RIKI , YOSHINAGA NAOKI , KAWASAKI KAORU , SUGIURA NATSUKO , FUJITA NOBUHIRO

IPC分类号： C22C38/00 , B21B3/00 , C21D8/04 , C21D9/46 , C21D9/48 , C22C38/04 , C22C38/06 , C22C38/38 , C22C38/58 , C23C2/04 , C23C2/06 , C23C2/26 , C23C2/28 , C23C2/40

CPC分类号： C22C38/02 , C21D8/0436 , C21D8/0473 , C21D9/48 , C21D2211/001 , C21D2211/002 , C21D2211/008 , C22C38/04 , C22C38/06 , C23C2/04 , C23C2/26 , C23C2/28

摘要： A high-strength cold-rolled steel sheet includes, by mass%, C: 0.10% to 0.40%, Mn: 0.5% to 4.0%, Si: 0.005% to 2.5%, Al: 0.005% to 2.5%, Cr: 0% to 1.0%, and a balance of iron and inevitable impurities, in which an amount of P is limited to 0.05% or less, an amount of S is limited to 0.02% or less, an amount ofN is limited to 0.006% or less, the microstructure includes 2% to 30% of retained austenite by area percentage, martensite is limited to 20% or less by area percentage in the microstructure, an average particle size of cementite is 0.01 µm to 1 µm, and 30% to 100% of the cementite has an aspect ratio of 1 to 3.

摘要翻译： 高强度冷轧钢板以质量％计含有C：0.10〜0.40％，Mn：0.5〜4.0％，Si：0.005〜2.5％，Al：0.005〜2.5％，Cr：0 ％以上且1.0％以下，余量为铁和不可避免的杂质，将P量限制在0.05％以下，S量限制在0.02％以下，N量限制在0.006％以下微观组织以面积率计含有2％〜30％的残留奥氏体，组织中的马氏体的面积率为20％以下，渗碳体的平均粒径为0.01μm〜1μm，以及30％〜100％的渗碳体具有1至3的纵横比。

3.

发明公开
HOT-ROLLED STEEL SHEET HAVING HIGH YIELD RATIO AND EXCELLENT LOW-TEMPERATURE IMPACT ENERGY ABSORPTION AND HAZ SOFTENING RESISTANCE AND METHOD FOR PRODUCING SAME 有权
标题翻译：供其生产的高屈服点和优良的低温冲击能量吸收和HAZ的软化和热压方法钢板

公开(公告)号：EP2743364A4

公开(公告)日：2015-11-04

申请号：EP12822363

申请日：2012-08-08

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： MARUYAMA NAOKI , YOSHINAGA NAOKI , AZUMA MASAFUMI , SAKUMA YASUHARU , ITAMI ATSUSHI

IPC分类号： C22C38/00 , B21B3/00 , C21D9/46 , C22C38/14 , C22C38/58 , C23C2/02 , C23C2/28

CPC分类号： C22C38/50 , C21D8/0263 , C21D8/0426 , C21D8/0473 , C21D8/0484 , C21D9/56 , C21D2211/002 , C21D2211/005 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/42 , C22C38/48 , C23C2/02 , Y10T428/12972

摘要： Hot rolled steel sheet which has a maximum tensile strength of 600 MPa or more and has an excellent low temperature impact energy absorption and HAZ softening resistance and a method of production of the same are provided, that is, sheet which contains, by mass%, C: 0.04 to 0.09%, Si: 0.4% or less, Mn: 1.2 to 2.0%, P: 0.1% or less, S: 0.02% or less, Al: 1.0% or less, Nb: 0.02 to 0.09%, Ti: 0.02 to 0.07%, and N: 0.005% or less, where 2.0‰¤Mn+8[%Ti]+12[%Nb]‰¤2.6, has a balance of Fe and unavoidable impurities, has an area percentage of pearlite of 5% or less, has a total area percentage of martensite and retained austenite of 0.5% or less, has a balance of a metal structure of ferrite and/or bainite, has an average grain size of ferrite and bainite of 10 µm or less, has an average particle size of alloy carbonitrides with incoherent interfaces which contain Ti and Nb of 20 nm or less, and has a yield ratio of 0.85 or more.