Ferritic stainless steel sheet having good workability and manufacturing method thereof
    1.
    发明授权
    Ferritic stainless steel sheet having good workability and manufacturing method thereof 有权
    具有良好加工性的铁素体不锈钢板及其制造方法

    公开(公告)号:US07094295B2

    公开(公告)日:2006-08-22

    申请号:US10695185

    申请日:2003-10-28

    IPC分类号: C21D6/02

    摘要: A method of manufacturing a ferritic stainless steel sheet having good workability with less anisotropy. The steps include providing a ferritic stainless steel comprising C up to about 0.03 mass %, N up to about 0.03 mass %, Si up to about 2.0 mass %, Mn up to about 2.0 mass %, Ni up to about 0.6 mass %, Cr about 9–35 mass %, Nb about 0.15–0.80 mass % and the balance being Fe except inevitable impurities; precipitation-heating said stainless steel at a temperature in a range of 700–850° C. for a time period not longer than 25 hours; and finish-annealing said stainless steel at a temperature in a range of 900–1100° C. for a time period not longer than 1 minute.

    摘要翻译: 一种制造铁素体不锈钢板的方法,所述铁素体系不锈钢板的加工性良好,各向异性小。 这些步骤包括提供一种铁素体不锈钢,其包含C至多0.03质量%,N至多约0.03质量%,Si至多约2.0质量%,Mn至多约2.0质量%,至多约0.6质量%的Ni,至多约0.6质量%的Cr 约9-35质量%,Nb约0.15-0.80质量%,余量为除了不可避免的杂质之外的Fe; 将不锈钢在700-850℃的温度范围内沉淀加热不超过25小时; 并在900-1100℃的温度范围内对不锈钢进行最终退火,时间不超过1分钟。

    Ferritic stainless steel sheet having good workability
    2.
    发明授权
    Ferritic stainless steel sheet having good workability 有权
    铁素体不锈钢板具有良好的加工性能

    公开(公告)号:US06673166B2

    公开(公告)日:2004-01-06

    申请号:US10027850

    申请日:2001-12-21

    IPC分类号: C22C3826

    摘要: The newly proposed ferritic stainless steel sheet consists of C up to 0.03 mass %, N up to 0.03 mass %, Si up to 2.0 mass %, Mn up to 2.0 mass %, Ni up to 0.6 mass %, 9-35 mass % Cr, 0.15-0.80 mass % Nb, optionally one or more of Ti up to 0.5 mass %, Mo up to 3.0 mass %, Cu up to 2.0 mass % and Al up to 6.0 mass %, and the balance being Fe except inevitable impurities, comprises metallurgical structure involving precipitates of 2 &mgr;m or less in particle size at a ratio not more than 0.5 mass % and has crystalline orientation on a rolled surface at ¼ depth of thickness with Integrated Density defined by the formula (a) not less than 1.2. The ferritic stainless steel sheet is manufactured by 25 hours or shorter precipitation-treatment at 700-850° C. in prior to 1 minute or shorter finish-annealing at 900-1100° C. Integrated Intensity is made greater than 2.0 by controlling particle size of precipitates not more than 0.5 &mgr;m, so as to realize good workability with less in-plane anisotropy. Wherein, Integrated Intensity=[I(222)/I0(222)]/[I(200)/I0(200)]  (a) wherein, I(222) and I(200) represents diffraction intensities on (222) and (200) planes of a sample of said steel measured by XRD, while I0(222) and I0(200) represents diffraction intensities on (222) and (200) planes of a non-directional sample.

    摘要翻译: 新提出的铁素体不锈钢板由C:0.03质量%以下,N以上0.03质量%以下,Si:2.0质量%以下,Mn:2.0质量%以下,Ni:0.6质量%以下,Cr:9-35质量% ,0.15-0.80质量%的Nb,任选地Ti至0.5质量%的Ti,至多3.0质量%的Mo,至多2.0质量%的Cu和至多6.0质量%的Al,余量为除了不可避免的杂质以外的Fe, 包括以不超过0.5质量%的粒径的2μm以下的析出物的冶金结构,并且在厚度为1/4的轧制表面上具有结晶取向,其中由式(a)定义的集成密度不小于1.2。 铁素体不锈钢板在900-1100℃下进行1分钟或更短的完成退火之前,在700-850℃下进行25小时或更短的沉淀处理制造。通过控制颗粒尺寸将集成强度大于2.0 的沉淀物不超过0.5μm,以便在较少的面内各向异性的情况下实现良好的可加工性。 其中,I(222)和I(200)表示通过XRD测量的所述钢样品的(222)和(200)面上的衍射强度,而I0(222)和I0(200)表示衍射强度对( 222)和(200)平面。

    Ferritic Stainless Steel for Use as Conduit Members for Emission of Automotive Exhaust Gas
    3.
    发明申请
    Ferritic Stainless Steel for Use as Conduit Members for Emission of Automotive Exhaust Gas 审中-公开
    铁素体不锈钢用作排放汽车废气的导管件

    公开(公告)号:US20110176954A1

    公开(公告)日:2011-07-21

    申请号:US13042542

    申请日:2011-03-08

    摘要: A ferritic stainless steel useful as conduit members for emission of automotive exhaust gas consists of C up to 0.03 mass %, Si up to 1.0 mass %, Mn up to 1.5 mass %, Ni up to 0.6 mass %, 10-20 mass % of Cr, Nb up to 0.50 mass %, 0.8-2.0 mass % of Cu, Al up to 0.03 mass %, 0.03-0.20 mass % of V, N up to 0.03 mass % and the balance being Fe except inevitable impurities with a provision of Nb≧8(C+N). The steel may further contain 0.05-0.30 mass % of Ti and/or 0.0005-0.02 mass % of B. Mo as an inevitable impurity is controlled to be less than 0.10 mass %. The steel has excellent formability, low-temperature toughness and weldability as well as the same heat-resistance as Nb, Mo-alloyed steel.

    摘要翻译: 可用作汽车废气排放管道部件的铁素体不锈钢由C:0.03质量%以下,Si:1.0质量%以下,Mn:1.5质量%以下,Ni:0.6质量%以下,10质量%以下 Cr,Nb为0.50质量%以下,Cu:Al:0.8〜2.0质量%,Al:0.03质量%以下,V:0.03〜0.20质量%,N:0.03质量%以下,余量除了不可避免的杂质以外的Fe, Nb≥8(C + N)。 该钢还可以含有0.05〜0.30质量%的Ti和/或0.0005〜0.02质量%的B。作为不可避免的杂质的Mo被控制为小于0.10质量%。 该钢具有优异的成形性,低温韧性和焊接性以及与Nb,Mo合金钢相同的耐热性。

    Ferritic Stainless Steel for Use as Conduit Members For Emission of Automotive Exhaust Gas
    4.
    发明申请
    Ferritic Stainless Steel for Use as Conduit Members For Emission of Automotive Exhaust Gas 审中-公开
    铁素体不锈钢用作汽车尾气排放管道

    公开(公告)号:US20090053093A1

    公开(公告)日:2009-02-26

    申请号:US12233122

    申请日:2008-11-06

    IPC分类号: C22C38/22 C22C38/20

    摘要: A ferritic stainless steel useful as conduit members for emission of automotive exhaust gas consists of C up to 0.03 mass %, Si up to 1.0 mass %, Mn up to 1.5 mass %, Ni up to 0.6 mass %, 10-20 mass % of Cr, Nb up to 0.50 mass %, 0.8-2.0 mass % of Cu, Al up to 0.03 mass %, 0.03-0.20 mass % of V, N up to 0.03 mass % and the balance being Fe except inevitable impurities with a provision of Nb≧8(C+N). The steel may further contain 0.05-0.30 mass % of Ti and/or 0.0005-0.02 mass % of B. Mo as an inevitable impurity is controlled less than 0.10 mass %. The steel has excellent formability, low-temperature toughness and weldability as well as the same heat-resistance as Nb, Mo-alloyed steel.

    摘要翻译: 可用作汽车废气排放管道部件的铁素体不锈钢由C:0.03质量%以下,Si:1.0质量%以下,Mn:1.5质量%以下,Ni:0.6质量%以下,10质量%以下 Cr,Nb为0.50质量%以下,Cu:Al:0.8〜2.0质量%,Al:0.03质量%以下,V:0.03〜0.20质量%,N:0.03质量%以下,余量除了不可避免的杂质以外的Fe, Nb> = 8(C + N)。 钢可以含有0.05〜0.30质量%的Ti和/或0.0005〜0.02质量%的B.Mo作为不可避免的杂质控制在0.10质量%以下。 该钢具有优异的成形性,低温韧性和焊接性以及与Nb,Mo合金钢相同的耐热性。

    Ferritic Stainless Steel for Use as Conduit Members For Emission of Automotive Exhaust Gas
    5.
    发明申请
    Ferritic Stainless Steel for Use as Conduit Members For Emission of Automotive Exhaust Gas 审中-公开
    铁素体不锈钢用作汽车尾气排放管道

    公开(公告)号:US20100119404A1

    公开(公告)日:2010-05-13

    申请号:US12689824

    申请日:2010-01-19

    摘要: A ferritic stainless steel useful as conduit members for emission of automotive exhaust gas consists of C up to 0.03 mass %, Si up to 1.0 mass %, Mn up to 1.5 mass %, Ni up to 0.6 mass %, 10-20 mass % of Cr, Nb up to 0.50 mass %, 0.8-2.0 mass % of Cu, Al up to 0.03 mass %, 0.03-0.20 mass % of V, N up to 0.03 mass % and the balance being Fe except inevitable impurities with a provision of Nb≧8(C+N). The steel may further contain 0.05-0.30 mass % of Ti and/or 0.0005-0.02 mass % of B. Mo as an inevitable impurity is controlled to be less than 0.10 mass %. The steel has excellent formability, low-temperature toughness and weldability as well as the same heat-resistance as Nb, Mo-alloyed steel.

    摘要翻译: 可用作汽车废气排放管道部件的铁素体不锈钢由C:0.03质量%以下,Si:1.0质量%以下,Mn:1.5质量%以下,Ni:0.6质量%以下,10质量%以下 Cr,Nb为0.50质量%以下,Cu:Al:0.8〜2.0质量%,Al:0.03质量%以下,V:0.03〜0.20质量%,N:0.03质量%以下,余量除了不可避免的杂质以外的Fe, Nb≥8(C + N)。 该钢还可以含有0.05〜0.30质量%的Ti和/或0.0005〜0.02质量%的B。作为不可避免的杂质的Mo被控制为小于0.10质量%。 该钢具有优异的成形性,低温韧性和焊接性以及与Nb,Mo合金钢相同的耐热性。