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    • 2. 发明授权
    • Heat-resistant Ti alloy material excellent in resistance to corrosion at high temperature and to oxidation
    • 耐高温钛合金材料耐高温腐蚀和氧化
    • US07138189B2
    • 2006-11-21
    • US10509028
    • 2003-03-25
    • Toshio NaritaTakumi Nishimoto
    • Toshio NaritaTakumi Nishimoto
    • B32B15/00C22C14/00C23C10/38C23C10/58
    • C23C28/021C22C14/00C23C10/16C23C10/56C23C28/028Y10T428/12458Y10T428/12743Y10T428/12806
    • 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.
    • 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。
    • 5. 发明授权
    • Aluminum product having metal diffusion layer, process for producing the
same, and paste for metal diffusion treatment
    • 具有金属扩散层的铝制品,其制造方法和用于金属扩散处理的糊料
    • US5989734A
    • 1999-11-23
    • US934754
    • 1997-09-22
    • Hirohisa MiuraNagayoshi MatsubaraYasuhiro YamadaHaruzo KatohTakashi Watsuji
    • Hirohisa MiuraNagayoshi MatsubaraYasuhiro YamadaHaruzo KatohTakashi Watsuji
    • C23C10/36C23C10/30C23C10/58C23C12/02B32B15/00
    • C23C12/02C23C10/30Y10T428/12778
    • An aluminum product having the metal diffusion layer in the present invention has, on the surface thereof, a metal diffusion layer comprising aluminum and a diffusion metal which is diffused setting aluminum as a matrix and which includes at least one selected from the group consisting of Ni, Cr, Cu, Zn, Mg, Ti and Ag; wherein the diffusion layer is formed by diffusing inclinatorily not less than 1 .mu.m from the surface thereof; and the diffusion metal is not less than 1.0% by weight when the whole of the metal diffusion layer is set to be 100% by weight. Also, in a process for producing an aluminum product having a metal diffusion layer, the surface of the aluminum product is brought into contact with the processing agent including at least the diffusion metal powder; and in this state by conducting heat treatment in the atmosphere including nitrogen, the diffusion metal is diffused on the surface of the aluminum product and the metal diffusion layer is formed. Thus, the present invention supplies the aluminum product having the metal diffusion layer on the surface thereof and the process for producing the aluminum product having this kind of metal diffusion layer on the surface thereof.
    • 本发明的具有金属扩散层的铝制品在其表面上具有包含铝和扩散金属的金属扩散层,扩散金属以铝为基质扩散,并且包括选自Ni ,Cr,Cu,Zn,Mg,Ti和Ag; 其特征在于,所述扩散层通过从其表面不均匀地扩散至少1μm而形成。 并且当全部金属扩散层设定为100重量%时,扩散金属不小于1.0重量%。 此外,在具有金属扩散层的铝制品的制造方法中,使铝制品的表面与至少包含扩散金属粉末的处理剂接触, 通过在包括氮的气氛中进行热处理,在该状态下,扩散金属扩散到铝制品的表面,形成金属扩散层。 因此,本发明在其表面上提供具有金属扩散层的铝制品及其表面上具有这种金属扩散层的铝制品的制造方法。
    • 10. 发明授权
    • Diffusion aluminizing of cobalt-base superalloys
    • 钴基超级合金的扩散镀铝
    • US4528215A
    • 1985-07-09
    • US548937
    • 1983-11-07
    • Alfonso L. BaldiVictor V. Damiano
    • Alfonso L. BaldiVictor V. Damiano
    • B01J35/04C23C10/02C23C10/40C23C10/48C23C10/56C23C10/58C23C10/60C23C11/00C23C13/00
    • C23C10/40B01J35/04C23C10/02C23C10/48C23C10/56C23C10/58C23C10/60
    • In the pack diffusion coating of chromium into the surface of a superalloy, the formation of undesirable oxide inclusion is reduced when the diffusion coating pack contains at least about 3% Ni.sub.3 Al. Also the formation of alpha-chromium is reduced when the pack diffusion is carried out in a retort effectively not over five inches in height. On the other hand an alpha-chromium-rich layer at least 0.2 mil thick can be deliberately formed and the superalloy thus coated subjected to an aluminizing treatment to convert the alpha-chromium into islands that provide very high sulfidation resistance. Pack aluminizing in the presence of chromium makes a very effective aluminum- or chromium-containing top coating over platinum plated or platinum coated nickel-base superalloys. Depletion of diffusible material from workpieces heated in a powder-pack can also provide a surface on which aluminizing produces a highly impact-resistant coating.
    • 在将包含在超级合金表面中的铬扩散涂层中,当扩散涂层包含至少约3%Ni 3 Al时,形成不期望的氧化物夹杂物减少。 当包装扩散在有效地不超过五英寸高的蒸馏器中进行时,还可以减少α-铬的形成。 另一方面,可以有意地形成至少0.2密耳厚的富铬的层,并且如此涂覆的超级合金进行镀铝处理以将α-铬转化为提供非常高的耐硫化性的岛。 在镀铬的情况下,镀铝处理使镀铂或镀铂镍基超级合金上的铝或铬的顶涂层非常有效。 从粉末包装中加热的工件中消散可扩散材料还可以提供一种表面,在该表面上,铝化产生高度耐冲击的涂层。