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    FERRITIC STAINLESS STEEL SHEET
    4.
    发明申请
    FERRITIC STAINLESS STEEL SHEET 审中-公开

    公开(公告)号：US20200308677A1

    公开(公告)日：2020-10-01

    申请号：US16310956

    申请日：2017-06-15

    申请人： JFE Steel Corporation

    发明人： Hidetaka Kawabe ,  Shuji Nishida ,  Mitsuyuki Fujisawa ,  Chikara Kami

    IPC分类号： C22C38/42 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/60 ,  C21D9/46

    摘要： Provided is a ferritic stainless steel sheet excellent in shape of weld zone and corrosion resistance of a weld zone with a material of a different kind formed by performing welding with austenitic stainless steel.A ferritic stainless steel sheet having a chemical composition containing, by mass %, C: 0.003% to 0.020%, Si: 0.01% to 1.00%, Mn: 0.01% to 0.50%, P: 0.040% or less, S: 0.010% or less, Cr: 20.0% to 24.0%, Cu: 0.20% to 0.80%, Ni: 0.01% to 0.60%, Al: 0.01% to 0.08%, N:. 0.003% to 0.020%, Nb: 0.40% to 0.80%, Ti: 0.01% to 0.10%, Zr: 0.01% to 0.10%, and the balance being Fe and inevitable impurities, in which relational expression (1) below is satisfied: 3.0≥Nb/(2Ti+Zr+0.5 Si+5 Al)≥1.5   (1), here, in relational expression (1), each of the atomic symbols denotes the content (mass %) of the corresponding chemical element.

    Ferritic stainless steel foil and method for producing the same
    5.
    发明授权
    Ferritic stainless steel foil and method for producing the same 有权

    公开(公告)号：US10227674B2

    公开(公告)日：2019-03-12

    申请号：US15302386

    申请日：2015-02-24

    申请人： JFE STEEL CORPORATION

    发明人： Akito Mizutani ,  Mitsuyuki Fujisawa

    IPC分类号： C21D9/46 ,  C22C38/50 ,  C21D1/76 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48

    摘要： Provided is a ferritic stainless steel foil having an excellent ability to form whiskers is obtained by its composition containing, by mass, C: 0.050% or less, Si: 2.00% or less, Mn: 0.50% or less, S: 0.010% or less, P: 0.050% or less, Cr: 15.0% or more and 30.0% or less, Al: 2.5% or more and 6.5% or less, N: 0.050% or less, one or more elements selected from Ti: 0.01% or more and 0.50% or less, Nb: 0.01% or more and 0.20% or less, V: 0.01% or more and 0.20% or less, Zr: 0.005% or more and 0.200% or less, and Hf: 0.005% or more and 0.200% or less, and the balance being Fe and inevitable impurities, the proportion of a {111} crystal grain (a crystal grain such that the difference between the {111} plane of the crystal grain and a direction perpendicular to the surface of the foil falls within ±15°) on the surface of the foil being 50% by area or more, and the thickness of an oxide layer formed on the surface of the foil being 0.1 μm or less.

    Ferritic-austenitic duplex stainless steel sheet
    9.
    发明授权
    Ferritic-austenitic duplex stainless steel sheet 有权

    公开(公告)号：US11142814B2

    公开(公告)日：2021-10-12

    申请号：US16479120

    申请日：2018-01-18

    申请人： JFE Steel Corporation

    发明人： Akito Mizutani ,  Mitsuyuki Fujisawa

    IPC分类号： C22C38/42 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C21C5/00 ,  C21D9/46

    摘要： Provided is a ferritic-austenitic duplex stainless steel sheet in which no blowholes are formed during welding and which has excellent strength.
    A chemical composition includes, in mass %, C: 0.10% or less, Si: 1.0% or less, Mn: 2.0 to 7.0%, P: 0.07% or less, S: 0.030% or less, Cr: 18.0 to 24.0%, Ni: 0.1 to 3.0%, Mo: 0.01 to 1.0%, Cu: 0.1 to 3.0%, Al: 0.003 to 0.10%, Zr: 0.01 to 0.50%, and N: 0.15 to 0.30%, with the balance being Fe and incidental impurities, the chemical composition satisfying formula (1) below and formula (2) below. N—Zr/6.5≥0.15%  (1) N—Zr/6.5≤0.23%  (2) Here, in formula (1) and formula (2), N represents a content (mass %) of the corresponding chemical element N and Zr represents a content (mass %) of the corresponding chemical element Zr.