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    STAHLFLACHPRODUKT UND VERFAHREN ZU SEINER HERSTELLUNG
    1.
    发明公开
    STAHLFLACHPRODUKT UND VERFAHREN ZU SEINER HERSTELLUNG 审中-公开
    钢丝产品及其生产方法

    公开(公告)号：EP3292228A1

    公开(公告)日：2018-03-14

    申请号：EP16723293.3

    申请日：2016-05-04

    申请人： ThyssenKrupp Steel Europe AG ,  thyssenkrupp AG

    发明人： THIESSEN, Richard G. ,  HELLER, Thomas ,  MACHALITZA, Karsten ,  SEBALD, Roland

    IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/28 ,  C22C38/38 ,  C21D9/46 ,  C21D8/02 ,  C22C38/22 ,  C22C38/32 ,  C23C2/06 ,  C21D1/18

    摘要： The invention relates to a flat steel product, having a tensile strength R
    m ≥ 950 MPa, a yield strength ≥ 800 MPa and an elongation at break A
    50 ≥ 8%. According to the invention, the flat steel product consists of steel which is composed of (in weight-%) 0.05 - 0.20% C, 0.2 - 1.5% Si, 0.01 - 1.5% Al, 1.0 - 3.0% Mn, ≤ 0.02% P, ≤ 0.005% S, ≤ 0.008% N, and in each case optionally 0.05 - 1.0%, 0.05 - 0.2% Mo, 0.005 - 0.2% Ti, 0.001 - 0.05% Nb, 0.0001 - 0.005% B, the remainder being Fe and inevitable impurities, wherein: 1.5 ≤ ψ ≤ 3, with ψ= (%C+%Mn/5+%Cr/6) / (%Al+%Si) and %C, %Mn, %Cr, %Al, %Si being the respective C, Mn, Cr, AI or Si content of the steel. At the same time the flat steel product has a structure which consists of (in area percentage) ≤ 5% bainite, ≤ 5% polygonal ferrite, ≥ 90% martensite and ≤ 2% by volume residual austenite, at least half of the martensite being tempered martensite. The invention also relates to a method for producing such a flat steel product.

    STAHL, STAHLFLACHPRODUKT UND VERFAHREN ZUR HERSTELLUNG EINES STAHLFLACHPRODUKTS
    7.
    发明公开
    STAHL, STAHLFLACHPRODUKT UND VERFAHREN ZUR HERSTELLUNG EINES STAHLFLACHPRODUKTS 审中-公开
    钢扁钢产品及其生产扁钢产品法

    公开(公告)号：EP2855717A1

    公开(公告)日：2015-04-08

    申请号：EP13726583.1

    申请日：2013-06-05

    申请人： ThyssenKrupp Steel Europe AG

    发明人： BONGARDS, Andreas ,  EBEST, Sigrun ,  FELDHAUS, Sebastian ,  PAUL, Udo ,  SEBALD, Roland

    IPC分类号： C21D6/02 ,  C21D8/02 ,  C21D8/04 ,  C23C2/06 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/26 ,  C22C38/38

    摘要： The invention relates to a steel and a sheet steel product produced therefrom, which have optimized mechanical properties and can be produced inexpensively without recourse having to be made to expensive alloying elements which are subject to great fluctuations in respect of their procurement costs. The steel and the sheet steel product have, according to the invention, the following composition (in % by weight): C: 0.12 - 0.18%; Si: 0.05 - 0.2%; Mn: 1.9 - 2.2%; Al: 0.2 - 0.5%; Cr: 0.05 - 0.2%; Nb: 0.01 - 0.06%; balance Fe and production-related unavoidable impurities including contents of phosphorus, sulphur, nitrogen, molybdenum, boron, titanium, nickel and copper, with the proviso that their contents are in each case: P: ≤ 0.02%, S: ≤ 0.003%, N: ≤ 0.008%, Mo: ≤ 0.1%, B: ≤ 0.0007%, Ti: ≤ 0.01%, Ni: ≤ 0.1%, Cu: ≤ 0.1%. The invention likewise relates to a process for producing a sheet steel product which consists of a steel according to the invention.