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公开(公告)号：US4292208A
公开(公告)日：1981-09-29
申请号：US687
申请日：1979-01-03
IPC分类号： B01J25/00 , B01J35/04 , B01J37/06 , C23C10/40 , C23C10/42 , C23C10/50 , C23C10/56 , C23C10/58 , C23C10/60 , B01J23/16 , B01J23/74 , B32B15/14
CPC分类号： B01J35/04 , B01J25/00 , B01J37/06 , C23C10/40 , C23C10/42 , C23C10/50 , C23C10/56 , C23C10/58 , C23C10/60 , Y10T428/12424 , Y10T428/12438 , Y10T428/12479 , Y10T428/12944 , Y10T428/12958 , Y10T428/12979
摘要： Diffusion coating a substrate metal with a different metal, such as aluminum and zinc, that is then chemically removed from the coated substrate, provides the residual metal with a very desirable catalytic surface. At least about a third of the removable metal can be dissolved out. Platinum wire screens activated in this way make effective exhaust catalysts for automotive engines. Chromium-rich coating for protective purposes can be applied on a superalloy, diffusion coating in a pack that in addition to the chromium to be diffused, also 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. Pack aluminizing in the presence of chromium makes a very effective aluminum- and 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： 使用不同金属（例如铝和锌）的基底金属的扩散涂覆，然后从涂覆的基底中化学去除，为残留金属提供了非常理想的催化剂表面。 至少约三分之一的可移除金属可以溶出来。 以这种方式激活的铂金丝网为汽车发动机生产有效的排气催化剂。 用于保护目的的富铬涂层可以应用于超合金，包装中的扩散涂层，除了要扩散的铬外，还含有至少约3％的Ni3Al。 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。 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和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。
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公开(公告)号：US3867184A
公开(公告)日：1975-02-18
申请号：US32837873
申请日：1973-01-31
发明人： BALDI ALFONSO L , DAMIANO VICTOR V
IPC分类号： B01D53/86 , B01J23/40 , B01J23/755 , B01J35/04 , B01J37/06 , C23C10/02 , C23C10/48 , C23C10/56 , C23C10/60 , C23C9/00
CPC分类号： B01J35/04 , B01D53/86 , B01J23/40 , B01J23/755 , B01J37/06 , C23C10/02 , C23C10/48 , C23C10/56 , C23C10/60
摘要： In the diffusion coating of aluminum onto brazed metal, the penetration of the aluminum into the brazing is reduced by conducting the diffusion coating with hydrated aluminum chloride, bromide or iodide as energizer, with the energizer preferably kept out of contact with the work being coated until the energizer volatilizes. This is particularly suited for aluminizing chromium-containing surfaces. Chromium diffusion coatings are less apt to form undesirable oxide inclusions when the diffusion coating is from a pack containing at least about 3% Ni3Al. Also the formation of undesirable alpha-chromium is reduced when the pack diffusion is carried out with a retort effectively not over 5 inches in height. Pack aluminizing where the aluminizing is inhibited by the presence of chromium in the pack makes a very effective top coating over platinum plated or platinum coated nickel-base superalloys. Aluminized nickel can also have it aluminum attacked and at least partially removed with aqueous caustic to leave a very highly active catalytic surface. Pack diffusion can also be arranged to simultaneously provide different coatings in different locations by using different pack compositions in those locations. An aluminizing pack containing a large amount of chromium provides a thinner aluminized case than an aluminizing pack containing less chromium and some silicon. Also a cobalt-chromium pack deposits essentially a chromized case when energized with a chloride, but deposits large amounts of cobalt along with chromium when energized with an iodide.
摘要翻译： 在铝在钎焊金属上的扩散涂层中，通过用水化氯化铝，溴化物或碘化物作为增能剂进行扩散涂层，铝的渗透减少，激发剂优选与被涂覆的工件脱离接触直到 激化剂挥发。 这特别适用于含铬表面的镀铝。 当扩散涂层来自含有至少约3％Ni3Al的组件时，铬扩散涂层不易形成不期望的氧化物夹杂物。 此外，当使用有效地不超过5英寸高度的蒸馏器进行包装扩散时，还会形成不希望的α-铬。 通过镀层中的铬的存在来抑制镀铝处理的镀层镀层在镀铂或镀铂的镍基超级合金上形成非常有效的顶涂层。 镀铝的镍还可以使铝受到侵蚀，并用苛性碱水溶液至少部分去除以留下非常高活性的催化剂表面。 包装扩散还可以被布置成通过在那些位置使用不同的包装组合来在不同位置同时提供不同的涂层。 含有大量铬的镀铝包装提供比含有较少铬和一些硅的镀铝包装更薄的镀铝箱。 当用氯化物通电时，钴铬组合物基本上沉积在铬化的壳体中，但是当用碘化物通电时，它还会与铬一起沉积大量的钴。
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公开(公告)号：US3625750A
公开(公告)日：1971-12-07
申请号：US3625750D
申请日：1970-01-09
申请人： AVCO CORP
摘要： This invention provides a method for producing uniform or nonuniform coatings of aluminum intermetallics on articles consisting of nickel- or cobalt-base alloys, using a reduced pressure pack coating technique in which the coating is derived from an alloy containing at least 40 percent by weight of aluminum.
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公开(公告)号：US20220213585A1
公开(公告)日：2022-07-07
申请号：US17706050
申请日：2022-03-28
发明人： Michael N. Task , Xuan Liu
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.
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公开(公告)号：US10914181B2
公开(公告)日：2021-02-09
申请号：US16051927
申请日：2018-08-01
申请人： MTU Aero Engines AG
发明人： Rudolf Stanka , Manfred Dopfer
摘要： The present invention relates to a blade or vane for a turbomachine, particularly for an aircraft engine, with a blade element for interacting with the flow medium, wherein the blade has different diffusion protective coatings in various regions on its surface for protection against corrosion and/or oxidation, wherein the diffusion protective coatings are produced by chromizing and/or aluminizing, wherein the blade element is divided into two regions along the longitudinal axis of the blade element, wherein the first region extends over 80 to 95% of the length of the blade element, and the second region extends over the remainder of the length of the blade element, and wherein in both regions, an AlCr diffusion protective coating is applied, and wherein in one of the regions, the AlCr diffusion protective coating has a higher Cr content.
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公开(公告)号：US10584411B2
公开(公告)日：2020-03-10
申请号：US14792721
申请日：2015-07-07
发明人： Mark A. Livings , Chelsea Brown
IPC分类号： C23C16/06 , C23C16/46 , B32B15/01 , F01D5/28 , C23C10/06 , F01D5/18 , C23C10/02 , C23C10/14 , C23C10/16 , C23C10/28 , C23C16/10 , C23C16/12 , C23C16/56 , C23C10/32 , C23C10/34 , C23C28/00 , C23C28/02 , C23C10/24 , C23C10/10 , C23C10/30 , C23C10/36 , C23C10/08 , C23C16/02 , C23C10/18 , C23C10/38 , C23C16/08 , C23C16/00 , C23C10/20 , C23C10/60 , C23C10/52 , C23C10/56 , C23C10/54 , C23C10/48
摘要： A method of applying a protective coating to an article comprises the steps of a) depositing aluminum in a surface region of an article, and b) depositing chromium is the surface region of the article subsequent to step a), whereby at least a portion of the chromium replaces at least a portion of the aluminum. Another method and an article are also disclosed.
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37.发明申请公开(公告)号：US20190040750A1
公开(公告)日：2019-02-07
申请号：US16051927
申请日：2018-08-01
申请人： MTU Aero Engines AG
发明人： Rudolf Stanka , Manfred Dopfer
摘要： The present invention relates to a blade or vane for a turbomachine, particularly for an aircraft engine, with a blade element for interacting with the flow medium, wherein the blade has different diffusion protective coatings in various regions on its surface for protection against corrosion and/or oxidation, wherein the diffusion protective coatings are produced by chromizing and/or aluminizing, wherein the blade element is divided into two regions along the longitudinal axis of the blade element, wherein the first region extends over 80 to 95% of the length of the blade element, and the second region extends over the remainder of the length of the blade element, and wherein in both regions, an AlCr diffusion protective coating is applied, and wherein in one of the regions, the AlCr diffusion protective coating has a higher Cr content.
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公开(公告)号：US20180202317A1
公开(公告)日：2018-07-19
申请号：US15919442
申请日：2018-03-13
发明人： Paul Mathew Walker
IPC分类号： F01D25/00 , C23C16/06 , C23C16/02 , B32B15/01 , B05D3/02 , C23C28/02 , C23C10/60 , C23C10/56 , C23C10/54 , C23C10/52 , C23C10/02
CPC分类号： F01D25/005 , B05D3/0254 , B32B15/017 , C23C10/02 , C23C10/52 , C23C10/54 , C23C10/56 , C23C10/60 , C23C16/0272 , C23C16/06 , C23C28/02 , C23C28/021 , C23C28/022 , C23C28/023
摘要： A method of coating a superalloy substrate, includes (a) aluminising the surface of the substrate to form an inner coating layer; (b) applying a slurry with a solid content including Cr, Al, Ni and Co onto the inner coating layer, where the Cr-content of the solid content is between 15% and 30% by weight thereof, and diffusion heat treating the slurry applied to the inner coating layer at a temperature above 800° C. for 1 to 8 hours to form an intermediate coating layer; and (c) applying a Cr-free slurry with a solid content including Al and Ni onto the intermediate coating layer, where the Al-content of the solid content is between 15% and 30% by weight of the solid content, and diffusion heat treating the slurry applied onto the intermediate surface layer at a temperature above 800° C. for 1 to 8 hours to form an outer coating layer.
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公开(公告)号：US5873951A
公开(公告)日：1999-02-23
申请号：US702175
申请日：1996-08-23
申请人： Kim A. Wynns , George T. Bayer
发明人： Kim A. Wynns , George T. Bayer
CPC分类号： C23C26/00 , B01J19/02 , C10G9/203 , C23C10/56 , C23C10/60 , C23C14/046 , B01J19/1825 , B01J2219/0236 , B01J2219/0286
摘要： The inner surface of ethylene furnace tubes is diffusion coated with a sufficient amount of chromium or chromium and silicon to form a first coating having a thickness of at least two mils. This coating is then cleaned, neutralized, and grit blasted. Then a second coating of a sufficient amount of aluminum or aluminum and silicon is diffused onto the first coating to form a total coating thickness of at least five mils. The surface of the second coating is cleaned and polished to remove the nickel and iron-rich overlay which is present as a result of the coating process and to provide a smooth uniform surface. When ethelyene is produced using furnace tubes which are coated in this manner less coking occurs.
摘要翻译： 乙烯炉管的内表面被扩散涂覆有足够量的铬或铬和硅以形成具有至少2密耳厚度的第一涂层。 然后将该涂层进行清洁，中和并进行喷砂处理。 然后将足够量的铝或铝和硅的第二涂层扩散到第一涂层上以形成至少五密耳的总涂层厚度。 第二涂层的表面被清洁和抛光以除去作为涂覆工艺的结果而存在的富含镍和铁的覆盖物并提供光滑均匀的表面。 当使用以这种方式涂覆的炉管制造乙烯时，发生少焦化。
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公开(公告)号：US5803991A
公开(公告)日：1998-09-08
申请号：US712549
申请日：1996-09-11
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.
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