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    • 7. 发明申请
    • Ferritic stainless steel sheet with excellent thermal fatigue properties, and automotive exhaust-gas path member
    • 具有优异的热疲劳性能的铁素体不锈钢板和汽车排气通道构件
    • US20080279712A1
    • 2008-11-13
    • US11798286
    • 2007-05-11
    • Manabu OkuTakeo TomitaYosuke SumiYasuhisa Tanaka
    • Manabu OkuTakeo TomitaYosuke SumiYasuhisa Tanaka
    • C22C38/22
    • C22C38/28C22C38/20C22C38/26C22C38/32
    • Disclosed is a ferritic stainless steel sheet with excellent thermal fatigue properties, including, by mass %, 0.03% or less of C, 1.0% or less of Si, 1.5% or less of Mn, 0.6% or less of Ni, 10˜20% of Cr, 0.05˜0.30% of Ti, 0.51˜0.65% of Nb, 0˜less than 0.10% of Mo, 0.8˜2.0% of Cu, 0˜0.10% of Al, 0.0005˜0.02% of B, 0˜0.20% of V, and 0.03% or less of N, with the balance being Fe and inevitable impurities, having a composition satisfying the following equations (1) and (2) and having a structure in which ε-Cu phase grains each having a long diameter of 0.5 μm or more are present in a density of 10 or less per 25 μm2: Nb−8(C+N)≧0 . . . (1), 10 Si+20 Mo+30 Cu+20(Ti+V)+160 Nb−(Mn+Ni)≧100 . . . (2). The ferritic stainless steel sheet, having a relatively inexpensive component composition, has excellent thermal fatigue properties, and is suitable for use in an automotive exhaust-gas path member, including an exhaust manifold, a catalyst converter, a front pipe, or a center pipe.
    • 公开了一种具有优异的热疲劳特性的铁素体系不锈钢板,以质量%计含有0.03%以下的C,1.0%以下的Si,1.5%以下的Mn,0.6%以下的Ni,10〜20 Cr的含量为0.05%,Ti为0.05〜0.30%,Nb为0.51〜0.65%,Mo为0.10〜0.10,Cu为0.8〜2.0%,Al为0〜0.10%,B为0.0005〜0.02% 具有满足下列等式(1)和(2)的组成的Fe和不可避免的杂质的平均值为0.03%或以下的N为0.03%以下,并且具有以下结构:ε- 0.5μm或更大的长直径存在于25μm2-Nb-8(C + N)> = 0的密度为10或更小的密度。 。 。 (1),10 Si + 20 Mo + 30 Cu + 20(Ti + V)+ 160 Nb-(Mn + Ni)> = 100。 。 。 (2)。 具有相对便宜的组分组成的铁素体不锈钢板具有优异的热疲劳性能,并且适用于包括排气歧管,催化剂转化器,前管或中心管的汽车尾气通道构件 。
    • 9. 发明申请
    • FERRITIC STAINLESS STEEL SHEET WITH EXCELLENT THERMAL FATIGUE PROPERTIES, AND AUTOMOTIVE EXHAUST-GAS PATH MEMBER
    • 具有极好的热疲劳性能的FERRITIC不锈钢板和汽车排气通路成员
    • US20100223927A1
    • 2010-09-09
    • US12756935
    • 2010-04-08
    • Manabu OKUTakeo TomitaYosuke SumiYasuhisa Tanaka
    • Manabu OKUTakeo TomitaYosuke SumiYasuhisa Tanaka
    • F01B31/26C21D8/02C22C38/50C22C38/54C22C38/42
    • C22C38/28C22C38/20C22C38/26C22C38/32
    • Disclosed is a ferritic stainless steel sheet with excellent thermal fatigue properties, including, by mass %, 0.03% or less of C, 1.0% or less of Si, 1.5% or less of Mn, 0.6% or less of Ni, 10˜20% of Cr, 0.05˜0.30% of Ti, 0.51˜0.65% of Nb, 0˜less than 0.10% of Mo, 0.8˜2.0% of Cu, 0˜0.10% of Al, 0.0005˜0.02% of B, 0˜0.20% of V, and 0.03% or less of N, with the balance being Fe and inevitable impurities, having a composition satisfying the following equations (1) and (2) and having a structure in which ε-Cu phase grains each having a long diameter of 0.5 μm or more are present in a density of 10 or less per 25 μm2: Nb−8(C+N)≧0 . . . (1), 10Si+20Mo+30Cu+20(Ti+V)+160Nb−(Mn+Ni)≧100 . . . (2). The ferritic stainless steel sheet, having a relatively inexpensive component composition, has excellent thermal fatigue properties, and is suitable for use in an automotive exhaust-gas path member, including an exhaust manifold, a catalyst converter, a front pipe, or a center pipe.
    • 公开了一种具有优异的热疲劳特性的铁素体系不锈钢板,以质量%计含有0.03%以下的C,1.0%以下的Si,1.5%以下的Mn,0.6%以下的Ni,10〜20 Cr的%,Ti的0.05〜0.30%,Nb的0.51〜0.65%,Mo的0.10%,Cu的0.8〜2.0%,Al的0〜0.10%,B的0.0005〜0.02% 具有满足下述式(1)和(2)的组成的Fe和不可避免的杂质的平均值为0.03%以下,N 2为0.03%以下,且具有以下结构: 0.5μm以上的长径以每25μm2 :Nb-8(C + N)≥0的密度为10以下而存在。 。 。 (1),10Si + 20Mo + 30Cu + 20(Ti + V)+ 160Nb-(Mn + Ni)≥100。 。 。 (2) 具有相对便宜的组分组成的铁素体不锈钢板具有优异的热疲劳性能,并且适用于包括排气歧管,催化剂转化器,前管或中心管的汽车尾气通道构件 。