MARTENSITIC STAINLESS STEEL FOR WELDED STRUCTURE
    1.
    发明公开
    MARTENSITIC STAINLESS STEEL FOR WELDED STRUCTURE 审中-公开
    MARTENSITISCHER NICHTROSTENDER STAHLFÜRGESCHWEISSTE STRUKTUR

    公开(公告)号:EP2058412A1

    公开(公告)日:2009-05-13

    申请号:EP07806152.0

    申请日:2007-08-28

    IPC分类号: C22C38/00 C22C38/58

    摘要: A martensitic stainless steel for welded structures including by mass %, C: 0.001 to 0.05%, Si: 0.05 to 1%, Mn: 0.05 to 2%, P: 0.03% or less, REM: 0.0005 to 0.1%, Cr: 8 to 16%, Ni: 0.1 to 9% and sol. Al: 0.001 to 0.1%; and further including one or more elements selected from among Ti: 0.005 to 0.5%, Zr: 0.005 to 0.5%, Hf: 0.005 to 0.5%, V: 0.005 to 0.5% and Nb: 0.005 to 0.5%; and O: 0.005% or less, N: 0.1% or less, with the balance being Fe and impurities; and the P and REM content satisfies: P ≤ 0.6 × REM. This steel possesses excellent SCC (stress corrosion cracking) resistance in welded sections in Sweet environments.

    摘要翻译: 焊接结构的马氏体系不锈钢,以质量%计,C:0.001〜0.05%,Si:0.05〜1%,Mn:0.05〜2%,P:0.03%以下,REM:0.0005〜0.1%,Cr:8 至16%,Ni:0.1〜9%,溶胶。 Al:0.001〜0.1% 进一步包括选自Ti:0.005〜0.5%,Zr:0.005〜0.5%,Hf:0.005〜0.5%,V:0.005〜0.5%,Nb:0.005〜0.5%的一种或多种元素; O:0.005%以下,N:0.1%以下,余量为Fe和杂质; P和REM含量满足:P‰¤0.6×REM。 这种钢在甜蜜环境中的焊接部分具有优异的SCC(应力腐蚀开裂)性。