中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

42 records (took 0.098 seconds)

    HIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING HIGH YIELD RATIO AND METHOD FOR PRODUCING SAID SHEET
    4.
    发明公开
    HIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING HIGH YIELD RATIO AND METHOD FOR PRODUCING SAID SHEET 审中-公开
    根据上述制造片高屈服比LIMITS AND METHOD高强度冷轧钢板

    公开(公告)号：EP3012339A1

    公开(公告)日：2016-04-27

    申请号：EP14834702.4

    申请日：2014-07-18

    Applicant: JFE Steel Corporation

    Inventor： TAKASHIMA, Katsutoshi ,  ONO, Yoshihiko ,  HASEGAWA, Kohei

    IPC: C22C38/00 ,  C21D9/46 ,  C22C38/14 ,  C22C38/58

    Abstract: Provided are a high-strength cold rolled steel sheet having excellent elongation and stretch flangeability, and a high yield ratio, and a production method therefor.A high-yield-ratio, high-strength cold rolled steel sheet includes a composition and a microstructure, the composition containing in terms of percent by mass, C: 0.05% to 0.15%, Si: 0.6% to 2.5%, Mn: 2.2% to 3.5%, P: 0.08% or less, S: 0.010% or less, Al: 0.01% to 0.08%, N: 0.010% or less, Ti: 0.002% to 0.05%, B: 0.0002% to 0.0050%, and the balance being Fe and unavoidable impurities, the microstructure containing a volume fraction of 20% to 55% of ferrite having an average grain size of 7 µm or less, a volume fraction of 5% to 15% of retained austenite, a volume fraction of 0.5% to 7% of martensite having an average grain size of 4 µm or less, and a structure composed of composed of bainite and/or tempered martensite and having an average grain size of 6 µm or less, and a difference in nano-hardness between ferrite and the structure composed of composed of bainite and/or tempered martensite being 3.5 GPa or less and a difference in nano-hardness between the structure composed of composed of bainite and/or tempered martensite. and martensite being 2.5 GPa or less.

    Abstract translation: 提供了具有优良的延伸率和延伸凸缘性的高强度冷轧钢板，以及高屈服比，和一个制造方法therefor.A高屈服比，高强度冷轧钢板包括组合物和微结构， 以质量％计含有所述组成物，C：0.05％〜0.15％以下，Si：0.6％〜2.5％以下，Mn：2.2％〜3.5％，P：0.08％以下，S：0.010％或以下，Al： 12：01％至12：08％，N：0.010％以下，Ti：0.002％〜0.05％，B：0.0002％〜0.0050％，余量为Fe和不可避免的杂质，显微组织含有20％的体积分数至55％ 的铁素体具有上的7微米或更小，的残余奥氏体，0.5％的体积分数，以具有上的4微米或更小的平均晶粒尺寸的马氏体的7％的5％至15％的体积分数，并且平均晶粒尺寸 构成的结构构成的贝氏体和/或回火马氏体，并且具有上的6微米或更小的平均晶粒尺寸，和铁素体与T之间的纳米硬度的差 哎结构由贝氏体构成的和/或回火马氏体是为3.5GPa或更小和的贝氏体和/或回火马氏体构成的组成的结构之间的纳米硬度的差别。 和马氏体为2.5 100GPa以下。

    HIGH-STRENGTH COLD-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME
    9.
    发明公开
    HIGH-STRENGTH COLD-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME 审中-公开
    高强度冷轧钢板及其制造方法

    公开(公告)号：EP3101147A1

    公开(公告)日：2016-12-07

    申请号：EP15743100.8

    申请日：2015-01-21

    Applicant: JFE Steel Corporation

    Inventor： TAKASHIMA, Katsutoshi ,  TOJI, Yuki ,  HASEGAWA, Kohei

    IPC: C22C38/00 ,  C21D9/46 ,  C22C38/14 ,  C22C38/58

    CPC classification number: C21D9/46 ,  C21D1/20 ,  C21D1/22 ,  C21D8/0221 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D8/0263 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/58

    Abstract: Provided are a high-strength cold-rolled steel sheet having a tensile strength of 1180 MPa or more with a high yield ratio excellent in terms of elongation and stretch flange formability and a method for manufacturing the steel sheet.
    A high-strength cold-rolled steel sheet having a chemical composition containing, by mass%, C: 0.15% or more and 0.30% or less, Si: 0.8% or more and 2.4% or less, Mn: 2.4% or more and 3.5% or less, P: 0.08% or less, S: 0.005% or less, Al: 0.01% or more and 0.08% or less, N: 0.010% or less, Ti: 0.002% or more and 0.05% or less, B: 0.0002% or more and 0.0050% or less, and the balance being Fe and inevitable impurities, a microstructure including ferrite having an average grain diameter of 3 µm or less and a volume fraction of 5% or less (including 0%), retained austenite having a volume fraction of 10% or more and 20% or less, martensite having an average grain diameter of 4 µm or less and a volume fraction of 20% or less (including 0%), and the balance including bainite and/or tempered martensite, in which an average number of cementite grains having a grain diameter of 0.1 µm or more per 100 µm 2 in a cross section in the thickness direction parallel to the rolling direction of the steel sheet is 30 or more.

    Abstract translation: 本发明提供拉伸强度为1180MPa以上，高伸长率，延伸凸缘成形性优异的高屈服比的高强度冷轧钢板及其制造方法。 1。一种高强度冷轧钢板，其特征在于，以质量％计，含有C：0.15％以上且0.30％以下，Si：0.8％以上且2.4％以下，Mn：2.4％以上， 3.5％以下，P：0.08％以下，S：0.005％以下，Al：0.01％以上且0.08％以下，N：0.010％以下，Ti：0.002％以上且0.05％以下， B：0.0002％以上且0.0050％以下，其余为Fe及不可避免的杂质，包含平均粒径为3μm以下，体积分率为5％以下（包括0％）的铁素体的组织， 具有10％以上且20％以下的体积率的残留奥氏体，平均粒径4μm以下，体积分率为20％以下（包括0％）的马氏体，余量由贝氏体和/ 或回火马氏体，其中，在平行于轧制方向的厚度方向的截面中，平均每100μm2的粒径为0.1μm以上的渗碳体粒子数 钢板为30以上。

    HIGH-STRENGTH COLD-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME
    10.
    发明公开
    HIGH-STRENGTH COLD-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME 审中-公开
    高强度冷轧钢板及其制造方法

    公开(公告)号：EP3009527A1

    公开(公告)日：2016-04-20

    申请号：EP14834577.0

    申请日：2014-07-18

    Applicant: JFE Steel Corporation

    Inventor： TAKASHIMA, Katsutoshi ,  ONO, Yoshihiko ,  HASEGAWA, Kohei

    IPC: C22C38/00 ,  C21D9/46 ,  C22C38/06 ,  C22C38/58

    CPC classification number: C21D9/46 ,  C21D1/25 ,  C21D1/84 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C21D8/0473 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/38

    Abstract: Provided are a high-strength cold-rolled steel sheet having excellent elongation, excellent stretch flangeability, and high yield ratio and a method for manufacturing the same. The high-strength cold-rolled steel sheet has a composition and a microstructure. The composition contains 0.15% to 0.27% C, 0.8% to 2.4% Si, 2.3% to 3.5% Mn, 0.08% or less P, 0.005% or less S, 0.01% to 0.08% Al, and 0.010% or less N on a mass basis, the remainder being Fe and inevitable impurities. The microstructure comprises: ferrite having an average grain size of 5 µm or less and a volume fraction of 3% to 20%, retained austenite having a volume fraction of 5% to 20%, and martensite having a volume fraction of 5% to 20%, the remainder being bainite and/or tempered martensite. The total number of retained austenite with a grain size of 2 µm or less, martensite with a grain size of 2 µm or less, or a mixed phase thereof is 150 or more per 2,000 µm 2 of a thickness cross section parallel to the rolling direction of the steel sheet.

    Abstract translation: 本发明提供伸长率优异，延伸凸缘性优异，高屈服比的高强度冷轧钢板及其制造方法。 高强度冷轧钢板具有组成和微观结构。 该组合物包含0.15％至0.27％的C，0.8％至2.4％的Si，2.3％至3.5％的Mn，0.08％或更少的P，0.005％或更少的S，0.01％至0.08％的Al和0.010％ 质量基准，其余为Fe和不可避免的杂质。 该组织包含平均粒径为5μm以下，体积分率为3％〜20％的铁素体，体积分率为5％〜20％的残留奥氏体和体积分数为5％〜20％的马氏体 ％，其余为贝氏体和/或回火马氏体。 粒径为2μm以下的残留奥氏体，粒径为2μm以下的马氏体或其混合相的总数在与轧制方向平行的厚度截面中每2,000μm2为150个以上 钢板。

Patent Agency Ranking