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    Ferritic heat-resistant steel and method for producing it
    4.
    发明公开
    Ferritic heat-resistant steel and method for producing it 有权
    Ferritischer，wärmebeständigerStahl und Verfahren zur Herstellung

    公开(公告)号：EP0903421A1

    公开(公告)日：1999-03-24

    申请号：EP98307629.0

    申请日：1998-09-21

    申请人： NATIONAL RESEARCH INSTITUTE FOR METALS

    发明人： Fujitsuna, Nobuyuki ,  Abe, Fujio ,  Itagaki, Takehiko ,  Igarashi, Masaaki ,  Muneki, Masakazu ,  Kimura, Kazuhiro ,  Kushima, Hideaki

    IPC分类号： C22C38/24 ,  C22C38/26 ,  C22C38/22

    CPC分类号： C21D6/002 ,  C21D1/18 ,  C21D1/28 ,  C21D8/005 ,  C21D8/0205 ,  C21D2211/005 ,  C22C38/002 ,  C22C38/005 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  F28F19/06

    摘要： The invention provides a ferritic heat-resistant steel having excellent high-temperature oxidation resistance, especially excellent steam oxidation-resistant characteristics. In high-Cr ferritic heat-resistant steel, ultra-fine oxide particles having a size of not larger than 1 µm are formed just below the oxide films and formed on the steel base, whereby the adhesiveness between the films and the base is enhanced.
    The ferretic heat-resistant steel consists of:

    C from 0.02 to 0.18%
    Si up to 1.0%, Mn up to 1.5%, P up to 0.030%, S up to 0.015%
    Cr from 8.0 to 13.0%
    Mo up to 2%, W up to 4%, with W + 2Mo ≤4%
    V from 0.10 to 0.50%, Nb from 0.02 to 0.14%
    either Ti and/or Y, with 0.01 ≤Ti + Y ≤0.30%
    either Rh and/or Ir, with 0.3% ≤Rh + (1/2)Ir ≤5%
    either Pd and/or Pt in a total amount between 0.3 and 5% balance Fe

    摘要翻译： 本发明提供一种具有优异的耐高温氧化性，特别优异的耐蒸汽抗氧化特性的铁素体耐热钢。 在高Cr铁素体耐热钢中，在氧化膜正下方形成尺寸不大于1μm的超细氧化物颗粒，形成在钢基上，由此提高了膜与基体之间的粘合性 。 铁质耐热钢由以下组成：C：0.02〜0.18％Si〜1.0％，Mn：1.5％以下，P：0.030％以下，S：0.015％以下，8.0〜13.0％，Mo：2％ W = 2％，W +2Mo≤4％V为0.10〜0.50％，Nb为0.02〜0.14％，Ti为0.01〜Ti，Y为0.01〜Ti +Y≤0.30％为Rh， 0.3％≤Rh+（1/2）Ir≤5％Pd和/或Pt的总量为0.3〜5％Fe