Heat-resistant ti alloy material excellent in resistance to corrosion at high temperature and to oxidation
    52.
    发明申请
    Heat-resistant ti alloy material excellent in resistance to corrosion at high temperature and to oxidation 失效
    耐高温钛合金材料耐高温腐蚀和氧化

    公开(公告)号:US20050244668A1

    公开(公告)日:2005-11-03

    申请号:US10509028

    申请日:2003-03-25

    摘要: Disclosed is a heat-resistant Ti alloy material excellent in high-temperature corrosion resistance and oxidation resistance, which comprises a base made of a heat-resistant Ti alloy and a surface layer formed on the surface of the base. The surface layer has a multilayer structure including an inner layer and an outer layer. The inner layer has three coexistent phases consisting of a β phase, a γ phase and a Laves phase in the phase diagram of a Ti—Al—Cr based alloy, and the outer layer is made of an Al—Ti—Cr based alloy having an Al concentration of 50 atomic % or more. The heat-resistant Ti alloy material is produced by subjecting a substrate made of a heat-resistant Ti alloy to a Cr diffusion treatment at a temperature within a β single-phase region in the phase diagram of a Ti—Al—Cr based alloy, precipitating a γ phase and a Laves phase from the β phase during a cooling process to form the inner layer with three coexistent phases consisting of the β, γ and Laves phases, and then subjecting the obtained product to an Al diffusion treatment to form the outer layer. The heat-resistant Ti alloy material can prevent the diffusion of Al from the outer layer to the base and the diffusion of elements of the base to the outer layer while forming a protective Al2O3 film in a self-repairing manner, to provide excellent high-temperature corrosion resistance and oxidation resistance to the heat-resistant Ti alloy base.

    摘要翻译: 本发明公开了一种耐高温耐氧化性优异的耐热性Ti合金材料,其特征在于,包括由耐热Ti合金构成的基体和形成在基材表面的表面层。 表面层具有包括内层和外层的多层结构。 内层在Ti-Al-Cr基合金的相图中具有由β相,γ相和Laves相组成的三个共存相,外层由Al-Ti-Cr基合金制成,其具有 50原子%以上的Al浓度。 耐热性Ti合金材料通过在Ti-Al-Cr系合金的相图中,使耐热Ti合金的基板在β单相区域内的温度下进行Cr扩散处理而制造, 在冷却过程中从β相沉淀出γ相和Laves相,以形成由β,γ和Laves相组成的三个共存相的内层,然后将所得产物进行Al扩散处理以形成外层 层。 耐热Ti合金材料可以防止Al从外层扩散到基底,并且可以在形成保护性Al 2 O 3的同时将基体的元素扩散到外层 以自修复方式,以耐热Ti合金基材提供优异的耐高温耐腐蚀性和抗氧化性。

    Low activity localized aluminide coating
    54.
    发明授权
    Low activity localized aluminide coating 失效
    低活性局部铝化物涂层

    公开(公告)号:US6022632A

    公开(公告)日:2000-02-08

    申请号:US733590

    申请日:1996-10-18

    摘要: The invention includes a low activity localized aluminide coating for a metallic article made by positioning a coating material, preferably in the form of a tape, on a portion of the article. The coating material comprises a binder, a halide activator, an aluminum source, and an inert ceramic material. The coating material and the article are heated in an inert atmosphere between about 1800.degree. F. (982.degree. C.) and about 2050.degree. F. (1121.degree. C.) for between about four and about seven hours thereby producing a low activity localized aluminide coating having an outward diffusion aluminide coating microstructure characterized by two distinct zones, an inner diffusion zone and an outer zone including between about 20-28 percent, by weight, aluminum.

    摘要翻译: 本发明包括用于金属制品的低活性局部铝化物涂层,其通过将优选为带状的涂层材料定位在制品的一部分上而制成。 涂层材料包括粘合剂,卤化物活化剂,铝源和惰性陶瓷材料。 将涂层材料和制品在约1800°F(982℃)至约2050°F(1121℃)的惰性气氛中加热约4小时至约7小时,从而产生局部 铝化物涂层具有向外扩散的铝化物涂层微结构,其特征在于两个不同的区域,内扩散区和包含约20-28重量%的铝的外区。

    Thermal barrier coating system with intermediate phase bondcoat
    55.
    发明授权
    Thermal barrier coating system with intermediate phase bondcoat 失效
    具有中间相粘合涂层的热障涂层体系

    公开(公告)号:US5856027A

    公开(公告)日:1999-01-05

    申请号:US829093

    申请日:1997-03-31

    申请人: Kenneth S. Murphy

    发明人: Kenneth S. Murphy

    摘要: A thermal barrier protected nickel based or cobalt based superalloy component for use in a gas turbine engine includes a thermal barrier coating system having a multi-layered structure. The first bondcoat layer of the thermal barrier coating system comprises a chemical vapor deposited, platinum modified diffusion aluminide layer on the superalloy component (substrate). The diffusion aluminide layer includes an inner diffusion zone proximate the substrate and an outer layer region comprising a platinum modified (platinum-bearing) intermediate phase of aluminum and at least one of nickel and cobalt depending on the superalloy composition. The intermediate phase is a non-ordered solid solution having a range of compositions and is free of other phase constituents. The intermediate phase has an average aluminum concentration in the range of about 18 to about 28% by weight, an average platinum concentration in the range of about 8 to about 35% by weight, and an average nickel concentration in the range of about 50 to 60% by weight and is non-stoichiometric relative to intermetallic compounds of aluminum and nickel, aluminum and cobalt, and aluminum and platinum. An adherent alpha alumina layer is thermally grown on the diffusion aluminide layer and receives an outer ceramic thermal barrier layer deposited thereon.

    摘要翻译: 用于燃气涡轮发动机的耐热保护的镍基或钴基超级合金部件包括具有多层结构的热障涂层系统。 热障涂层系统的第一粘合涂层包括在超合金部件(基底)上的化学气相沉积的铂改性扩散铝化物层。 扩散铝化物层包括靠近衬底的内部扩散区域和包含铝的铂改性(含铂负载)中间相以及镍和钴中的至少一种的外层区域,这取决于超级合金组成。 中间相是具有一定范围的组成并且不含其它相成分的无序固溶体。 中间相的平均铝浓度在约18至约28重量%的范围内,平均铂浓度在约8至约35重量%的范围内,平均镍浓度在约50至 60重量%,相对于铝和镍,铝和钴的金属间化合物以及铝和铂而言是非化学计量的。 在扩散铝化物层上热生长粘附的α氧化铝层并且接收其上沉积的外部陶瓷热障壁。

    Thermal barrier coating system with intermediate phase bondcoat
    56.
    发明授权
    Thermal barrier coating system with intermediate phase bondcoat 失效
    具有中间相粘合涂层的热障涂层体系

    公开(公告)号:US5716720A

    公开(公告)日:1998-02-10

    申请号:US407224

    申请日:1995-03-21

    申请人: Kenneth S. Murphy

    发明人: Kenneth S. Murphy

    摘要: A thermal barrier protected nickel based or cobalt based superalloy component for use in a gas turbine engine includes a thermal barrier coating system having a multi-layered structure. The first bondcoat layer of the thermal barrier coating system comprises a chemical vapor deposited, platinum modified diffusion aluminide layer on the superalloy component (substrate). The diffusion aluminide layer includes an inner diffusion zone proximate the substrate and an outer layer region comprising a platinum modified (platinum-bearing) intermediate phase of aluminum and at least one of nickel and cobalt depending on the superalloy composition. The intermediate phase is a non-ordered solid solution having a range of compositions and is free of other phase constituents. The intermediate phase has an average aluminum concentration in the range of about 18 to about 26% by weight, an average platinum concentration in the range of about 8 to about 35% by weight, and an average nickel concentration in the range of about 50 to 60% by weight and is non-stoichiometric relative to intermetallic compounds of aluminum and nickel, aluminum and cobalt, and aluminum and platinum. An adherent alpha alumina layer is thermally grown on the diffusion aluminide layer and receives an outer ceramic thermal barrier layer deposited thereon.

    摘要翻译: 用于燃气涡轮发动机的耐热保护的镍基或钴基超级合金部件包括具有多层结构的热障涂层系统。 热障涂层系统的第一粘合涂层包括在超合金部件(基底)上的化学气相沉积的铂改性扩散铝化物层。 扩散铝化物层包括靠近衬底的内部扩散区域和包含铝的铂改性(含铂负载)中间相以及镍和钴中的至少一种的外层区域,这取决于超级合金组成。 中间相是具有一定范围的组成并且不含其它相成分的无序固溶体。 中间相的平均铝浓度在约18至约26重量%的范围内,平均铂浓度在约8至约35重量%的范围内,平均镍浓度在约50至 60重量%,相对于铝和镍,铝和钴的金属间化合物以及铝和铂而言是非化学计量的。 在扩散铝化物层上热生长粘附的α氧化铝层并且接收其上沉积的外部陶瓷热障壁。

    Method of aluminizing, in particular for aluminizing elongate metal
cavities
    57.
    发明授权
    Method of aluminizing, in particular for aluminizing elongate metal cavities 失效
    铝化方法,特别是铝化细长金属腔

    公开(公告)号:US5648120A

    公开(公告)日:1997-07-15

    申请号:US255740

    申请日:1994-06-07

    IPC分类号: C23C10/48 C21D8/12

    CPC分类号: C23C10/48

    摘要: In this method, aluminization is performed by using thermochemical treatment, and an aluminum donor piece (6) based on metallic aluminum is placed in the vicinity of the surface to be treated (2), prior to said treatment. Preferably, said piece is provided with a thin metal coating (10) that withstands the treatment temperature. The invention is particularly applicable to protecting cooling channels in the blades of a gas turbine.

    摘要翻译: 在该方法中,通过使用热化学处理进行镀铝,并且在所述处理之前将基于金属铝的铝供体片(6)放置在待处理表面(2)附近。 优选地,所述件具有耐受处理温度的薄金属涂层(10)。 本发明特别适用于保护燃气轮机叶片中的冷却通道。

    Metal diffusion and after-treatment
    58.
    发明授权
    Metal diffusion and after-treatment 失效
    金属扩散和后处理

    公开(公告)号:US5128179A

    公开(公告)日:1992-07-07

    申请号:US905247

    申请日:1986-09-08

    申请人: Alfonso L. Baldi

    发明人: Alfonso L. Baldi

    摘要: A nickel-base superalloy is subjected to a diffusion chromizing that supplies a chromized diffusion case, the outer surface of which contains excess alphachrome phase, and then contacting the diffusion case with an aqueous solution of alkali metal permanganate and alkali metal hydroxide until the desired amount of alphachrome phase is eliminated.

    摘要翻译: 对镍基超级合金进行扩散镀铬处理,该扩散镀铬提供铬化扩散壳体,其外表面含有过量的铝合金相,然后使扩散箱与碱金属高锰酸盐和碱金属氢氧化物的水溶液接触直到所需量 消除了阿尔法相。

    Method for applying diffusion coating masks
    59.
    发明授权
    Method for applying diffusion coating masks 失效
    涂布扩散涂层的方法

    公开(公告)号:US4978558A

    公开(公告)日:1990-12-18

    申请号:US204815

    申请日:1988-06-10

    申请人: Foster P. Lamm

    发明人: Foster P. Lamm

    CPC分类号: C23C10/04

    摘要: Methods for selectively applying a diffusion aluminide coating to the surface of a metal article while keeping other article surfaces free of the coating are described. The method includes the steps of injection molding a mixture of materials onto the surfaces which are to be kept free of coating; the material comprises solid particles effective in preventing deposition of the coating onto the surfaces and a moldable amorphous thermoplastic resin; it contains no volatilizable solvents. The mixture is applied to the article surface to a thickness of about 5 millimeters. It is useful in pack diffusion as well as vapor phase diffusion aluminide coating operations.