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    High Mn Austenitic Stainless Steel
    3.
    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

    申请人： Yukinori Yamamoto ,  Michael L. Santella ,  Michael P. Brady ,  Philip J. Maziasz ,  Chain-Tsuan Liu

    发明人： Yukinori Yamamoto ,  Michael L. Santella ,  Michael P. Brady ,  Philip J. Maziasz ,  Chain-Tsuan Liu

    IPC分类号： C22C38/44 ,  C22C38/52 ,  C22C38/18 ,  C22C38/58 ,  C22C38/42 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28

    CPC分类号： C22C38/58 ,  C22C38/06 ,  C22C38/54 ,  Y10T428/166

    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。

    Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates
    6.
    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

    申请人： Michael P. Brady ,  Bing Yang ,  Philip J. Maziasz

    发明人： Michael P. Brady ,  Bing Yang ,  Philip J. Maziasz

    IPC分类号： B32B15/04 ,  B05D5/12

    CPC分类号： H01M8/021 ,  C22C38/24 ,  C23C8/02 ,  C23C8/34 ,  H01M8/0204 ,  H01M8/0215 ,  H01M8/0228 ,  H01M2008/1095 ,  Y02P70/56 ,  Y10T428/31678

    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。

    Nano-scale nitride-particle-strengthened high-temperature wrought ferritic and martensitic steels
    8.
    发明授权
    Nano-scale nitride-particle-strengthened high-temperature wrought ferritic and martensitic steels 失效
    纳米级氮化物颗粒强化高温锻造铁素体和马氏体钢

    公开(公告)号：US07520942B2

    公开(公告)日：2009-04-21

    申请号：US10947119

    申请日：2004-09-22

    申请人： Ronald L. Klueh ,  Naoyuki Hashimoto ,  Philip J. Maziasz

    发明人： Ronald L. Klueh ,  Naoyuki Hashimoto ,  Philip J. Maziasz

    IPC分类号： C22C38/24 ,  C22C38/46

    CPC分类号： C22C38/44 ,  C21D1/18 ,  C21D6/004 ,  C21D6/007 ,  C21D7/13 ,  C21D9/08 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/46 ,  C22C38/48

    摘要： A method of making a steel composition includes the steps of: a. providing a steel composition that includes up to 15% Cr, up to 3% Mo, up to 4% W, 0.05-1% V, up to 2% Si, up to 3% Mn, up to 10% Co, up to 3% Cu, up to 5% Ni, up to 0.3% C, 0.02-0.3% N, balance iron, wherein the percentages are by total weight of the composition; b. austenitizing the composition at a temperature in the range of 1000° C. to 1400° C.; c. cooling the composition of steel to a selected hot-working temperature in the range 500° C. to 1000° C.; d. hot-working the composition at the selected hot-working temperature; e. annealing the composition for a time period of up to 10 hours at a temperature in the range of 500° C. to 1000° C.; and f. cooling the composition to ambient temperature to transform the steel composition to martensite, bainite, ferrite, or a combination of those microstructures.

    摘要翻译： 制造钢组合物的方法包括以下步骤：a。 提供钢组合物，其包含高达15％的Cr，高达3％的Mo，高达4％的W，0.05-1％的V，高达2％的Si，至多3％的Mn，高达10％的Co，直到 3％Cu，至多5％Ni，至多0.3％C，0.02-0.3％N，余量铁，其中百分比为组合物总重量; b。 在1000℃至1400℃的温度下奥氏体化组合物; C。 将钢的组成冷却至500℃至1000℃范围内的选定热工作温度。 d。 在选定的热工作温度下热处理组合物; e。 在500℃至1000℃的温度下将组合物退火长达10小时的时间段; 和f。 将组合物冷却至环境温度以将钢组合物转化为马氏体，贝氏体，铁素体或这些微结构的组合。

    High temperature creep resistant austenitic alloy
    9.
    发明授权
    High temperature creep resistant austenitic alloy 失效
    耐高温蠕变奥氏体合金

    公开(公告)号：US4849169A

    公开(公告)日：1989-07-18

    申请号：US193705

    申请日：1988-05-13

    申请人： Philip J. Maziasz ,  Robert W. Swindeman ,  Gene M. Goodwin

    发明人： Philip J. Maziasz ,  Robert W. Swindeman ,  Gene M. Goodwin

    IPC分类号： C22C30/00

    CPC分类号： C22C30/00

    摘要： An improved austenitic alloy having in wt % 19-21 Cr, 30-35 Ni, 1.5-2.5 Mn, 2-3 Mo, 0.1-0.4 Si, 0.3-0.5 Ti, 0.1-0.3 Nb, 0.1-0.5 V, 0.001-0.005 P, 0.08-0.12 C, 0.01-0.03 N, 0.005-0.01 B and the balance iron that is further improved by annealing for up to 1 hour at 1150.degree.-1200.degree. C. and then cold deforming 5-15 %. The alloy exhibits dramatically improved creep rupture resistance and ductility at 700.degree. C.

    摘要翻译： 一种改进的奥氏体合金，其重量百分比为19-21Cr，30-35Ni，1.5-2.5Mn，2-3Mo，0.1-0.4Si，0.3-0.5Ti，0.1-0.3Nb，0.1-0.5V，0.001- 0.005 P，0.08-0.12 C，0.01-0.03 N，0.005-0.01 B，剩余铁通过在1150°-1200℃下退火长达1小时进一步提高，然后冷变形5-15％。 该合金在700℃下显示出显着改善的抗蠕变断裂性和延展性。

    Heat and corrosion resistant cast CN-12 type stainless steel with improved high temperature strength and ductility
    10.
    发明授权
    Heat and corrosion resistant cast CN-12 type stainless steel with improved high temperature strength and ductility 有权
    耐腐蚀耐腐蚀CN-12型不锈钢，具有改善的高温强度和延展性

    公开(公告)号：US07255755B2

    公开(公告)日：2007-08-14

    申请号：US10195703

    申请日：2002-07-15

    申请人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

    发明人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

    IPC分类号： C22C38/58

    CPC分类号： C22C38/02 ,  C21D6/005 ,  C22C38/001 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/52 ,  C22C38/58

    摘要： A cast stainless steel alloy and articles formed therefrom containing about 0.5 wt. % to about 10 wt. % manganese, 0.02 wt. % to 0.50 wt. % N, and less than 0.15 wt. % sulfur provides high temperature strength both in the matrix and at the grain boundaries without reducing ductility due to cracking along boundaries with continuous or nearly-continuous carbides. Alloys of the present invention also have increased nitrogen solubility thereby enhancing strength at all temperatures because nitride precipitates or nitrogen porosity during casting are not observed. The solubility of nitrogen is dramatically enhanced by the presence of manganese, which also retains or improves the solubility of carbon thereby providing additional solid solution strengthening due to the presence of manganese and nitrogen, and combined carbon. Such solution strengthening enhances the high temperature precipitation-strengthening benefits of fine dispersions of NbC. Such solid solution effects also enhance the stability of the austenite matrix from resistance to excess sigma phase or chrome carbide formation at higher service temperatures. The presence of sulfides is substantially eliminated.

    摘要翻译： 铸造的不锈钢合金和由其形成的制品含有约0.5wt。 ％至约10wt。 ％锰，0.02重量％ ％至0.50重量％ ％N，小于0.15wt。 ％硫在基体和晶界处均提供高温强度，而不会因连续或几乎连续的碳化物沿边界开裂而降低延展性。 本发明的合金还具有增加的氮溶解度，从而在所有温度下增强强度，因为没有观察到铸造期间的氮化物沉淀或氮气孔隙。 由于锰的存在，氮的溶解度显着提高，这也保留或提高了碳的溶解度，从而由于锰和氮以及组合碳的存在而提供额外的固溶强化。 这种溶液强化提高了NbC细分散体的高温析出强化效果。 这种固溶效应还提高了奥氏体基体在较高使用温度下从耐过剩σ相或碳化铬形成的稳定性。 基本上消除了硫化物的存在。