Ferritic stainless steel for automobile exhaust gas passage components and welded steel pipe
    2.
    发明公开
    Ferritic stainless steel for automobile exhaust gas passage components and welded steel pipe 有权
    铁艺制品​​厂EdelstahlfürAbgasleitungskomponenten eines Fahrzeuges undgeschweißtesStahlrohr

    公开(公告)号:EP1930461A1

    公开(公告)日:2008-06-11

    申请号:EP07022210.4

    申请日:2007-11-15

    摘要: A ferritic stainless steel for automobile exhaust gas passage components comprises, in mass percent, C: not more than 0.03%, Si: not more than 1 %, Mn: not more than 1.5%, Ni: not more than 0.6%, Cr: 10-20%, Nb: not more than 0.5%, Ti: 0.05-0.3%, Al: more than 0.03% to 0.12%, Cu: more than 1% to 2%, V: not more than 0.2%, N: not more than 0.03%, B: 0.0005-0.02%, 0: not more than 0.01%, and the balance of Fe and unavoidable impurities, whose composition satisfies the relationships Nb ≥ 8 (C + N) and 0.02 ≤ Al - (54/48) O ≤ 0.1. The steel enables fabrication of automobile exhaust gas passage components that are excellent in high-temperature strength and weld toughness, and offers a wide range of freedom in selecting suitable pipe-making conditions.

    摘要翻译: 汽车废气通道部件用铁素体系不锈钢以质量%计含有C:0.03%以下,Si:1%以下,Mn:1.5%以下,Ni:0.6%以下,Cr: 10-20%,Nb:不大于0.5%,Ti:0.05-0.3%,Al:大于0.03%至0.12%,Cu:大于1%至2%,V:不大于0.2% 不超过0.03%,B:0.0005-0.02%,0:不大于0.01%,余量为Fe和不可避免的杂质,其组成满足Nb‰¥8(C + N)和0.02‰Al - ( 54/48)O‰0.1。 该钢能够制造出具有优异的高温强度和焊接韧性的汽车废气通道部件,并且在选择合适的制管条件方面提供了广泛的自由度。

    Ferritic stainless steel material for automobile exhaust gas passage components
    3.
    发明公开
    Ferritic stainless steel material for automobile exhaust gas passage components 有权
    Ferraricher EdelstahlfürAbgasleitungskomponenten eines Fahrzeuges

    公开(公告)号:EP2060650A1

    公开(公告)日:2009-05-20

    申请号:EP08019006.9

    申请日:2008-10-30

    摘要: To provide a ferritic stainless steel material for automobile exhaust gas passage components usable in a high-temperature range over 900°C and even over 950°C. The ferritic stainless steel material has excellent heat resistance and low-temperature toughness and has a composition comprising, in terms of % by mass, at most 0.03 % of C, at most 1 % of Si, from 0.6 to 2 % of Mn, at most 3 % of Ni, from 10 to 25 % of Cr, from 0.3 to 0.7 % of Nb, from more than 1 to 2 % of Cu, from 1 to 2.5 % of Mo, from 1 to 2.5 % of W, at most 0.15 % of Al, from 0.03 to 0.2 % of V, and at most 0.03 % of N, and optionally containing any of B, Co, W, Ti, Zr, REM and Ca with a balance of Fe and inevitable impurities, and the composition satisfies restrictive formulae 1.2Nb + 5Mo + 6Cu ≥ 11.5 and 15Nb + 2Mo + 0.5Cu ≥ 10.5. The steel material has a texture where the total amount of Nb and Mo existing as a precipitation phase is at most 0.2 % by mass.

    摘要翻译: 提供一种可用于900℃以上甚至950℃以上的高温范围的汽车废气通道部件用铁素体系不锈钢材料。 所述铁素体系不锈钢材料具有优异的耐热性和低温韧性,其组成为以质量%计,含有0.03%以下的Si,1%以下的Si,0.6〜2%的Mn, 最多3%的Ni,10〜25%的Cr,0.3〜0.7%的Nb,1〜2%的Cu,1〜2.5%的Mo,1〜2.5%的W, Al的0.15%,V的0.03〜0.2%,N的0.03%以下,任选地含有Fe,不可避免的杂质的B,Co,W,Ti,Zr,REM和Ca中的任一种, 组合满足限制公式1.2Nb + 5Mo + 6Cu‰¥11.5和15Nb + 2Mo + 0.5Cu‰¥10.5。 该钢材具有作为析出相存在的Nb和Mo的总量为0.2质量%以下的结构。