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    Surface alloyed high temperature alloys
    3.
    发明授权
    Surface alloyed high temperature alloys 失效
    表面合金化高温合金

    公开(公告)号：US06503347B1

    公开(公告)日：2003-01-07

    申请号：US09577597

    申请日：2000-05-25

    申请人： Andrew George Wysiekierski ,  Gary Anthony Fisher ,  Sabino Steven Anthony Petrone ,  Radhakrishna Chakravarthy Mandyam

    发明人： Andrew George Wysiekierski ,  Gary Anthony Fisher ,  Sabino Steven Anthony Petrone ,  Radhakrishna Chakravarthy Mandyam

    IPC分类号： C23C228

    CPC分类号： C23C12/02 ,  C10G9/203 ,  C23C4/18 ,  C23C10/52 ,  C23C26/00 ,  Y10T428/12583 ,  Y10T428/12979

    摘要： There is provided a surface alloyed component which comprises a base alloy with a diffusion barrier layer enriched in silicon and chromium being provided adjacent thereto. An enrichment pool layer is created adjacent the diffusion barrier and contains silicon and chromium and optionally titanium or aluminum. The method comprises depositing a surface alloy on the base alloy at a temperature in the range of 400 to 1000° C. and heat treating the surface alloy at a ramp temperature rate of at least 5C°/minute, preferably 10 to 20° C./minute, to a desired maximum temperature at which the surface alloyed component is maintained for a time sufficient to provide the enrichment pool or the enrichment pool with a diffusion barrier layer. A reactive gas treatment may be used to generate a replenishable protective oxide scale of alumina or chromia on the outermost surface of the surface alloyed component.

    摘要翻译： 提供了一种表面合金成分，其包括具有富含硅的扩散阻挡层的基底合金和与之相邻的铬。 在扩散阻挡层附近产生富集池层，并且含有硅和铬以及任选的钛或铝。 该方法包括在400〜1000℃的温度范围内在基体合金上沉积表面合金，并以至少5℃/分钟，优选10〜20℃的斜坡温度热处理表面合金。 /分钟，使表面合金成分保持足够的时间以使富集池或富集池具有扩散阻挡层的所需最高温度。 可以使用反应性气体处理来在表面合金成分的最表面上产生氧化铝或氧化铬的可补充的氧化皮保护层。

    Coating system for high temperature stainless steel
    4.
    发明授权
    Coating system for high temperature stainless steel 有权
    高温不锈钢涂层系统

    公开(公告)号：US06585864B1

    公开(公告)日：2003-07-01

    申请号：US09589196

    申请日：2000-06-08

    申请人： Gary Anthony Fisher ,  Robert Prescott ,  Yan Chen ,  Hang Zheng ,  Chinnia Subramanian ,  Andrew George Wysiekierski

    发明人： Gary Anthony Fisher ,  Robert Prescott ,  Yan Chen ,  Hang Zheng ,  Chinnia Subramanian ,  Andrew George Wysiekierski

    IPC分类号： C23C1435

    CPC分类号： C23C28/3215 ,  C23C26/00 ,  C23C28/322 ,  C23C28/325 ,  C23C28/345

    摘要： A method for protecting high temperature stainless steel from coking and corrosion at elevated temperatures in corrosive environments, such as during ethylene production, by coating the stainless steel with an overlay coating of MCrAlX in which M is nickel, cobalt, iron or a mixture thereof and X is yttrium, hafnium, zirconium, lanthanum or combination thereof. The overlay coating and stainless steel substrate are heat-treated to metallurgically bond the overlay coating to the substrate and to form a multiphased microstructure. The overlay coating preferably is aluminized by depositing a layer of aluminum thereon and subjecting the resulting coating to oxidation to form an alumina surface layer. An intermediary aluminum-containing diffusion coating may be deposited directly onto the stainless steel substrate prior to deposition of the overlay coating to form a protective interlayer between the stainless steel substrate and overlay coating.

    摘要翻译： 一种在腐蚀性环境例如乙烯生产过程中，在高温下保护高温不锈钢的方法，用不锈钢涂覆MCrAlX，其中M是镍，钴，铁或其混合物， X是钇，铪，锆，镧或其组合。 将覆盖层和不锈钢衬底进行热处理，将覆盖层冶金结合到衬底上并形成多相微结构。 覆盖涂层优选通过在其上沉积铝层而进行镀铝，并对所得到的涂层进行氧化以形成氧化铝表面层。 中间含铝扩散涂层可以在沉积覆盖层之前直接沉积到不锈钢衬底上，以在不锈钢衬底和覆盖涂层之间形成保护性中间层。