知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

63 条记录 (耗时 0.022 秒)

    Aluminum-chromium diffusion coating
    21.
    发明授权
    Aluminum-chromium diffusion coating 有权

    公开(公告)号：US11286550B2

    公开(公告)日：2022-03-29

    申请号：US15470949

    申请日：2017-03-28

    申请人： United Technologies Corporation

    发明人： Michael N. Task ,  Xuan Liu

    IPC分类号： C23C10/26 ,  C23C10/54 ,  C23C10/56 ,  C23C10/52 ,  C23C10/30 ,  C23C10/60

    摘要： A process includes applying a slurry to a surface of a metallic article to produce a slurry film on the surface. The slurry is composed of a liquid carrier, chromium and aluminum, and an agent that is reactive with the chromium and aluminum to form intermediary compounds. The article and slurry film are then thermally treated at an activation temperature at which the agent reacts with the chromium and aluminum to form the intermediary compounds. The intermediary compounds deposit the chromium and aluminum on the surface. The thermal treating also diffuses the chromium and aluminum into a sub-surface region of the article such that the sub-surface region becomes enriched with chromium and aluminum.

    Diffusion method for coating high temperature nickel chromium alloy products
    25.
    发明授权
    Diffusion method for coating high temperature nickel chromium alloy products 失效
    涂覆高温镍铬合金产品的扩散方法

    公开(公告)号：US6139649A

    公开(公告)日：2000-10-31

    申请号：US255596

    申请日：1999-02-22

    申请人： Kim A. Wynns

    发明人： Kim A. Wynns

    IPC分类号： C10G9/20 ,  C23C10/56 ,  C23C10/60 ,  C23C14/04 ,  C23C26/00 ,  C23C8/80

    CPC分类号： C10G9/203 ,  C23C10/56 ,  C23C10/60 ,  C23C14/046 ,  C23C26/00

    摘要： The inner surface of a high temperature nickel chromium alloy product such as ethylene furnace tubes is cleaned with high temperature hydrogen to prepare the surface for the deposition, diffusion and modification of metals. A first layer of chromium or chromium and silicon is deposited and diffusion heat treated or covered by the second layer of aluminum, magnesium, silicon and manganese and third layer of rare earth metals such as yttrium and zirconium. Each layer or the combination of layers is diffusion heat treated at sufficient time and temperature to cause a diffusion depth ranging from 50 microns to 150 microns with a maximum of 250 microns. The surface is then heated to convert the immediate surface to a spinel and further pretreated with argon and nitrogen to stabilize the surface oxides. The surface of the final coating can be polished to minimize sites for carbon buildup. When ethylene is produced using furnace tubes which are coated in this manner less coking occurs.

    摘要翻译： 用高温氢气清洗高温镍铬合金产品如乙烯炉管的内表面，以制备金属沉积，扩散和改性的表面。 沉积第一层铬或铬和硅，并由第二层铝，镁，硅和锰以及第三层稀土金属如钇和锆进行扩散热处理或覆盖。 每个层或层的组合在足够的时间和温度下进行扩散热处理，以使扩散深度范围为50微米至150微米，最大值为250微米。 然后将表面加热以将立即表面转化为尖晶石，并进一步用氩气和氮气预处理以稳定表面氧化物。 可以抛光最终涂层的表面以最小化碳积累的部位。 当使用以这种方式涂覆的炉管产生乙烯时，发生少焦化。

    Corrosion-resistant metallic porous member and method of manufacturing the same
    26.
    发明授权
    Corrosion-resistant metallic porous member and method of manufacturing the same 失效
    耐腐蚀金属多孔构件及其制造方法

    公开(公告)号：US5582867A

    公开(公告)日：1996-12-10

    申请号：US493461

    申请日：1995-06-22

    申请人： Toshiyasu Tsubouchi ,  Satoru Okamoto ,  Tomohiko Ihara

    发明人： Toshiyasu Tsubouchi ,  Satoru Okamoto ,  Tomohiko Ihara

    IPC分类号： C22F1/10 ,  C21D1/74 ,  C21D6/00 ,  C21D9/00 ,  C23C10/56 ,  C23C16/00

    CPC分类号： C23C10/56

    摘要： In manufacturing a corrosion-resistant metallic porous member having high Cr content by diffusion process in which the material is heat-treated, a plurality of heat cycles are used to achieve uniform Cr content in the thickness direction.Metallic porous body of Ni, Fe, Ni--Cr or Fe--Cr is buried in a powder of Al, Cr and NH.sub.4 Cl. Inert gas such as Ar and H.sub.2 is introduced and the porous body is heat treated at 800.degree.-1100.degree. C. In the heat treatment, at least two temperature-increase and temperature-decrease steps are included.

    摘要翻译： 在通过热处理材料的扩散处理制造具有高Cr含量的耐腐蚀金属多孔构件时，使用多个热循环来实现厚度方向上均匀的Cr含量。 Ni，Fe，Ni-Cr或Fe-Cr的金属多孔体被埋在Al，Cr和NH4Cl粉末中。 引入惰性气体如Ar和H 2，多孔体在800°-1100℃进行热处理。在热处理中，包括至少两个温度升高和降温步骤。

    Diffusion aluminizing of cobalt-base superalloys
    29.
    发明授权
    Diffusion aluminizing of cobalt-base superalloys 失效
    钴基超级合金的扩散镀铝

    公开(公告)号：US4528215A

    公开(公告)日：1985-07-09

    申请号：US548937

    申请日：1983-11-07

    申请人： Alfonso L. Baldi ,  Victor V. Damiano

    发明人： Alfonso L. Baldi ,  Victor V. Damiano

    IPC分类号： B01J35/04 ,  C23C10/02 ,  C23C10/40 ,  C23C10/48 ,  C23C10/56 ,  C23C10/58 ,  C23C10/60 ,  C23C11/00 ,  C23C13/00

    CPC分类号： C23C10/40 ,  B01J35/04 ,  C23C10/02 ,  C23C10/48 ,  C23C10/56 ,  C23C10/58 ,  C23C10/60

    摘要： 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.

    摘要翻译： 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。