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    Chromiumm diffusion coatings
    1.
    发明授权
    Chromiumm diffusion coatings 有权
    铬扩散涂层

    公开(公告)号：US07645485B2

    公开(公告)日：2010-01-12

    申请号：US10836791

    申请日：2004-04-30

    申请人： Murali Madhava

    发明人： Murali Madhava

    IPC分类号： C23C16/00

    CPC分类号： C22C27/06 ,  C22C28/00 ,  C23C10/34 ,  C23C10/52 ,  C23C10/54 ,  F01D5/288 ,  F05D2230/31 ,  F05D2230/90 ,  Y02T50/671

    摘要： There is provided a method for applying an improved chromium diffusion coating on an industrial item such as a turbine blade of a gas turbine engine. Chromium and other active metals are combined to form an alloy coating. Active elements include silicon, hafnium, zirconium, yttrium, tantalum, and rhenium. For producing the modified coatings through pack cementation chromium and a master alloy are mixed into a packing along with inert material and a halide activator. The packing surrounds a target in a diffusion box. The metals are then deposited by diffusion onto a target surface by pack cementation methods. The diffusion of the desired metals takes place during a coating thermal cycle. Alternatively, the diffusion can take place using an out-of-pack arrangement. Such modified coatings are utilized as improved performance coatings for environmental resistance applications over the current chromium diffusion coatings.

    摘要翻译： 提供了一种在工业物品如燃气涡轮发动机的涡轮叶片上施加改进的铬扩散涂层的方法。 铬和其他活性金属组合形成合金涂层。 活性元素包括硅，铪，锆，钇，钽和铼。 为了通过包装胶结制备改性涂料，将铬合金和母合金与惰性材料和卤化物活化剂一起混入填料中。 包装围绕扩散箱中的目标物。 然后通过包装胶结方法将金属通过扩散沉积到目标表面上。 所需金属的扩散在涂层热循环期间发生。 或者，扩散可以使用脱包装置进行。 这种改性涂层被用作改进的涂层，用于超过目前的铬扩散涂层的耐环境应用。

    Method of depositing chromium and silicon on a metal to form a diffusion coating
    2.
    发明授权
    Method of depositing chromium and silicon on a metal to form a diffusion coating 失效
    在金属上沉积铬和硅以形成扩散涂层的方法。

    公开(公告)号：US5492727A

    公开(公告)日：1996-02-20

    申请号：US240350

    申请日：1994-05-10

    申请人： Robert A. Rapp ,  Ge Wang ,  Endang Pangestuti

    发明人： Robert A. Rapp ,  Ge Wang ,  Endang Pangestuti

    IPC分类号： C23C10/54 ,  C23C16/00

    CPC分类号： C23C10/54

    摘要： A method for the simultaneous deposition of chromium and silicon to form a diffusion coating on a workpiece uses a halide-activated cementation pack with a dual halide activator. Elemental metal powders may be employed with the dual activator. A two-step heating schedule prevents blocking a chromium carbide from forming at the surface of the workpiece. Small contents of either Ce or V can be added to the Cr+Si contents of the coating by introducing oxides of Ce or V into the filler of the pack.

    摘要翻译： 用于同时沉积铬和硅以在工件上形成扩散涂层的方法使用具有双卤化物活化剂的卤化物活化胶结包装。 元素金属粉末可与双重活化剂一起使用。 两步加热程序可防止在工件表面形成碳化铬。 可以通过将Ce或V的氧化物引入包装的填料中，将Ce或V的少量添加到涂层的Cr + Si含量中。

    Case-hardening method for carbon steel
    3.
    发明授权
    Case-hardening method for carbon steel 失效
    碳钢表面硬化方法

    公开(公告)号：US3988515A

    公开(公告)日：1976-10-26

    申请号：US548971

    申请日：1975-02-11

    申请人： Hiroshi Hashimoto ,  Kiyomitsu Suga ,  Toshio Shimizu

    发明人： Hiroshi Hashimoto ,  Kiyomitsu Suga ,  Toshio Shimizu

    IPC分类号： C23C16/32 ,  C23C10/36 ,  C23C10/54 ,  C23C9/02

    CPC分类号： C23C10/54 ,  C23C10/36 ,  Y10T428/31678

    摘要： A case-hardening method for forming a hardened layer on the surface of carbon steel of high toughness and hardness is provided which comprises forming a powdered mixture of titanium in an amount of 5 to 30% by weight of said mixture, chromium in an amount such that the weight ratio of chromium to titanium is within the range of 2 to 10, alumina and a catalyst, embedding carbon steel in said powder mixture, and then subjecting said mixture to a heat treatment to form a hardened layer mainly composed of titanium carbide. The method may also be carried out by coating the surface of carbon steel with alumina, preparing a powder mixture containing titanium in an amount of 5 to 30% by weight of said mixture chromium in an amount such that the weight ratio of chromium to titanium is within the range of 2 to 10, alumina and a catalyst, then embedding said alumina-coated carbon steel in said powder mixture, and then subjecting said mixture to a heat treatment to form a hardened layer mainly composed of titanium carbide.

    摘要翻译： 提供一种用于在高韧性和硬度的碳钢表面上形成硬化层的表面硬化方法，其包括以所述混合物的5至30重量％的量形成钛的粉末混合物，其量为 铬与钛的重量比在2〜10的范围内，氧化铝和催化剂，将碳钢包埋在所述粉末混合物中，然后对所述混合物进行热处理以形成主要由碳化钛组成的硬化层。 该方法也可以通过用氧化铝涂覆碳钢表面来进行，制备含钛量的粉末混合物，其量为所述混合物铬的5至30重量％，其量使铬与钛的重量比为 在2至10的范围内，氧化铝和催化剂，然后将所述氧化铝涂覆的碳钢包埋在所述粉末混合物中，然后对所述混合物进行热处理以形成主要由碳化钛组成的硬化层。

    Chromium-silicon diffusion coating
    8.
    发明授权
    Chromium-silicon diffusion coating 失效
    铬 - 硅扩散涂层

    公开(公告)号：US5972429A

    公开(公告)日：1999-10-26

    申请号：US962753

    申请日：1997-11-03

    申请人： George T. Bayer ,  Kim A. Wynns

    发明人： George T. Bayer ,  Kim A. Wynns

    IPC分类号： C23C10/52 ,  C23C10/54 ,  C23C16/22

    CPC分类号： C23C10/52 ,  C23C10/54

    摘要： A method of diffusion coating a surface of an alloy product containing at least 5 wt. % iron with a chromium-silicon coating uses a dual activator containing a fluoride salt and a chloride salt, at least one of those salts particularly being ammonium chloride or another ammonium halide salt. The pack mix contain at least 20% chromium and a chromium to silicon ratio of at least 10 to 1. The workpiece is heated to at least 2050.degree. F. to obtain a coating of at least 10 mils which contains at least 30% chromium. Upon heating the ammonium salt will form a reducing environment containing molecular hydrogen. The presence of molecular hydrogen speeds up the chemical reactions by an additional reduction reaction to create the surface coating which enables the coating reactions to occur shorter hold times.

    摘要翻译： 一种扩散涂覆合金产品表面的方法，该合金产品含有至少5wt。 具有铬 - 硅涂层的％铁使用含有氟化物盐和氯化物盐的双重活化剂，这些盐中的至少一种盐，特别是氯化铵或另一种卤化铵盐。 包装混合物含有至少20％的铬和至少10:1的铬与硅的比例。将工件加热至至少2050°F，以获得至少10密耳的涂层，其中含有至少30％的铬。 加热后，铵盐将形成含有分子氢的还原环境。 分子氢的存在通过额外的还原反应加速化学反应，产生表面涂层，使涂层反应发生更短的保持时间。