High Mn Austenitic Stainless Steel
    1.
    发明申请
    High Mn Austenitic Stainless Steel 有权
    高锰奥氏体不锈钢

    公开(公告)号:US20080292489A1

    公开(公告)日:2008-11-27

    申请号:US12181718

    申请日:2008-07-29

    摘要: An austenitic stainless steel alloy includes, in weight percent: >4 to 15 Mn; 8 to 15 Ni; 14 to 16 Cr; 2.4 to 3 Al; 0.4 to 1 total of at least one of Nb and Ta; 0.05 to 0.2 C; 0.01 to 0.02 B; no more than 0.3 of combined Ti+V; up to 3 Mo; up to 3 Co; up to 1W; up to 3 Cu; up to 1 Si; up to 0.05 P; up to 1 total of at least one of Y, La, Ce, Hf, and Zr; less than 0.05 N; and base Fe, wherein the weight percent Fe is greater than the weight percent Ni, and wherein the alloy forms an external continuous scale including alumina, nanometer scale sized particles distributed throughout the microstructure, the particles including at least one of NbC and TaC, and a stable essentially single phase FCC austenitic matrix microstructure that is essentially delta-ferrite-free and essentially BCC-phase-free.

    摘要翻译: 奥氏体不锈钢合金包括:重量百分比:> 4至15Mn; 8〜15 Ni; 14至16 Cr; 2.4至3 Al; Nb和Ta中的至少一种为0.4〜1; 0.05〜0.2℃; 0.01〜0.02 B; 不超过0.3的Ti + V组合; 最多3 Mo; 最多3公司; 高达1W; 最多3 Cu; 高达1 Si; 高达0.05 P; 最多1个Y,La,Ce,Hf和Zr中的至少一个; 小于0.05 N; 和Fe基,其中Fe的重量百分比大于Ni的重量百分比,并且其中所述合金形成包括氧化铝的外部连续尺度,分布在整个微结构中的纳米尺度的颗粒,所述颗粒包括NbC和TaC中的至少一种,以及 基本上稳定的单相FCC奥氏体基体微观结构,其基本上是不含铁素体的,并且基本上不含BCC相。

    High Nb, Ta, and Al Creep- and Oxidation-Resistant Austenitic Stainless Steels
    4.
    发明申请
    High Nb, Ta, and Al Creep- and Oxidation-Resistant Austenitic Stainless Steels 有权
    高Nb,Ta和Al蠕变和抗氧化奥氏体不锈钢

    公开(公告)号:US20080304996A1

    公开(公告)日:2008-12-11

    申请号:US12103837

    申请日:2008-04-16

    IPC分类号: C22C38/42 C22C38/44 C22C38/58

    CPC分类号: C22C38/48 C22C38/06

    摘要: An austenitic stainless steel HTUPS alloy includes, in weight percent: 15 to 30 Ni; 10 to 15 Cr; 2 to 5 Al; 0.6 to 5 total of at least one of Nb and Ta; no more than 0.3 of combined Ti+V; up to 3 Mo; up to 3 Co; up to 1 W; up to 0.5 Cu; up to 4 Mn; up to 1 Si; 0.05 to 0.15 C; up to 0.15 B; up to 0.05 P; up to 1 total of at least one of Y, La, Ce, Hf, and Zr; less than 0.05 N; and base Fe, wherein the weight percent Fe is greater than the weight percent Ni wherein said alloy forms an external continuous scale comprising alumina, nanometer scale sized particles distributed throughout the microstructure, said particles comprising at least one composition selected from the group consisting of NbC and TaC, and a stable essentially single phase fcc austenitic matrix microstructure, said austenitic matrix being essentially delta-ferrite-free and essentially BCC-phase-free.

    摘要翻译: 奥氏体不锈钢HTUPS合金包括:重量百分比:15至30Ni; 10〜15 Cr; 2至5铝; 0.6〜5%的Nb和Ta中的至少一种; 不超过0.3的Ti + V组合; 最多3 Mo; 最多3公司; 高达1W; 高达0.5 Cu; 高达4 Mn; 高达1 Si; 0.05〜0.15℃ 高达0.15B; 高达0.05 P; 最多1个Y,La,Ce,Hf和Zr中的至少一个; 小于0.05 N; 和Fe基,其中Fe的重量百分比大于Ni的重量百分比,其中所述合金形成包含分布在整个微结构中的纳米尺度尺寸的氧化铝的外部连续刻度,所述颗粒包含至少一种选自NbC 和TaC,以及基本稳定的单相fcc奥氏体基体显微组织,所述奥氏体基体基本上不含铁素体,并且基本上不含BCC相。

    Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates
    5.
    发明授权
    Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates 有权
    用于PEM燃料电池双极板的铁基合金和氮化处理

    公开(公告)号:US07829194B2

    公开(公告)日:2010-11-09

    申请号:US11582034

    申请日:2006-10-17

    IPC分类号: B32B15/04 B05D5/12

    摘要: A corrosion resistant electrically conductive component that can be used as a bipolar plate in a PEM fuel cell application is composed of an alloy substrate which has 10-30 wt. % Cr, 0.5 to 7 wt. % V, and base metal being Fe, and a continuous surface layer of chromium nitride and vanadium nitride essentially free of base metal. A oxide layer of chromium vanadium oxide can be disposed between the alloy substrate and the continuous surface nitride layer. A method to prepare the corrosion resistant electrically conductive component involves a two-step nitridization sequence by exposing the alloy to a oxygen containing gas at an elevated temperature, and subsequently exposing the alloy to an oxygen free nitrogen containing gas at an elevated temperature to yield a component where a continuous chromium nitride layer free of iron has formed at the surface.

    摘要翻译: 可用作PEM燃料电池应用中的双极板的耐腐蚀导电组件由具有10-30重量% %Cr,0.5〜7wt。 %V,贱金属为Fe,以及基本不含贱金属的氮化铬和氮化钒的连续表面层。 可以在合金基板和连续表面氮化物层之间设置铬钒氧化物的氧化物层。 制备耐腐蚀导电组分的方法涉及通过在高温下将合金暴露于含氧气体的两步氮化顺序,随后在升高的温度下将合金暴露于不含氧的含氮气体,得到 其中在表面形成有不含铁的连续的氮化铬层。

    Cast alumina forming austenitic stainless steels
    8.
    发明授权
    Cast alumina forming austenitic stainless steels 有权
    铸造氧化铝成型奥氏体不锈钢

    公开(公告)号:US08431072B2

    公开(公告)日:2013-04-30

    申请号:US13114745

    申请日:2011-05-24

    IPC分类号: C22C38/54 C22C38/58 C22C38/06

    摘要: An austenitic stainless steel alloy consisting essentially of, in terms of weight percent ranges 0.15-0.5C; 8-37Ni; 10-25Cr; 2.5-5Al; greater than 0.6, up to 2.5 total of at least one element selected from the group consisting of Nb and Ta; up to 3Mo; up to 3Co; up to 1W; up to 3Cu; up to 15Mn; up to 2Si; up to 0.15B; up to 0.05P; up to 1 total of at least one element selected from the group consisting of Y, La, Ce, Hf, and Zr;

    摘要翻译: 奥氏体不锈钢合金,其重量百分比基本上在0.15-0.5℃范围内; 8-37Ni; 10-25Cr; 2.5-5Al; 大于0.6,最多2.5个选自Nb和Ta中的至少一种元素; 高达3Mo; 高达3Co 高达1W; 达3Cu; 高达15Mn; 高达2Si; 最高0.15B; 高达0.05P; 最多1个选自Y,La,Ce,Hf和Zr中的至少一种元素; <0.3Ti + V; <0.03N; 并且平衡Fe,其中Fe的重量百分比大于Ni的重量百分比,并且其中所述合金形成包含氧化铝的外部连续刻度,以及稳定的基本上单相的FCC奥氏体基体微观结构,所述奥氏体基体基本上不含铁素体的铁素体 并且基本上不含BCC相。 还公开了制造奥氏体不锈钢合金的方法。

    Alumina forming iron base superalloy
    9.
    发明授权
    Alumina forming iron base superalloy 有权
    氧化铝成型铁基超合金

    公开(公告)号:US08815146B2

    公开(公告)日:2014-08-26

    申请号:US13440639

    申请日:2012-04-05

    IPC分类号: C22C38/50 C22C30/00

    摘要: An austenitic stainless steel alloy, consists essentially of, in weight percent 2.5 to 4 Al; 25 to 35 Ni; 12 to 19 Cr; at least 1, up to 4 total of at least one element selected from the group consisting of Nb and Ta; 0.5 to 3 Ti; less than 0.5 V; 0.1 to 1 of at least on element selected from the group consisting of Zr and Hf; 0.03 to 0.2 C; 0.005 to 0.1 B; and base Fe. The weight percent Fe is greater than the weight percent Ni. The alloy forms an external continuous scale including alumina, and contains coherent precipitates of γ′-Ni3Al, and a stable essentially single phase FCC austenitic matrix microstructure. The austenitic matrix is essentially delta-ferrite-free and essentially BCC-phase-free.

    摘要翻译: 奥氏体不锈钢合金基本上由2.5至4重量百分比的Al组成; 25至35镍; 12至19 Cr; 至少1个,至多4个总计选自Nb和Ta的至少一种元素; 0.5〜3 Ti; 小于0.5V; 0.1至1个选自Zr和Hf的至少一种元素; 0.03〜0.2℃; 0.005〜0.1B; 和碱Fe。 Fe的重量百分比大于Ni的重量百分比。 该合金形成包括氧化铝在内的外部连续尺度,并且包含γ'-Ni3Al的相干沉淀物,以及基本稳定的单相FCC奥氏体基体微观结构。 奥氏体基体基本上是不含铁素体的,并且基本上不含BCC相。