US3918139A - MCrAlY type coating alloy - Google Patents

MCrAlY type coating alloy Download PDF

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Publication number
US3918139A
US3918139A US487074A US48707474A US3918139A US 3918139 A US3918139 A US 3918139A US 487074 A US487074 A US 487074A US 48707474 A US48707474 A US 48707474A US 3918139 A US3918139 A US 3918139A
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United States
Prior art keywords
percent
nickel
cobalt
group
platinum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US487074A
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English (en)
Inventor
Edward J Felten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Technologies Corp
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United Technologies Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Technologies Corp filed Critical United Technologies Corp
Priority to US487074A priority Critical patent/US3918139A/en
Priority to GB23056/75A priority patent/GB1500780A/en
Priority to AU81560/75A priority patent/AU487226B2/en
Priority to IN1079/CAL/1975A priority patent/IN144076B/en
Priority to IL47407A priority patent/IL47407A/en
Priority to CH721275A priority patent/CH606455A5/xx
Priority to SE7507095A priority patent/SE410477B/xx
Priority to CA000230272A priority patent/CA1158075A/en
Priority to IT24839/75A priority patent/IT1039467B/it
Priority to NO75752355A priority patent/NO141371C/no
Priority to FR7520876A priority patent/FR2277902A1/fr
Priority to DE2530197A priority patent/DE2530197C2/de
Priority to JP50084341A priority patent/JPS5842255B2/ja
Priority to BR7504327*A priority patent/BR7504327A/pt
Application granted granted Critical
Publication of US3918139A publication Critical patent/US3918139A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/288—Protective coatings for blades
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12778—Alternative base metals from diverse categories
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12875—Platinum group metal-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12944—Ni-base component

Definitions

  • the present invention relates to alloys and more particularly to nickel, cobalt or nickel-cobalt coating alloys having improved hot corrosion resistance.
  • aluminide coatings such as those described in the patent to Joseph U.S. Pat. No. 3,102,044 or the patents to Bungardt et al. U.S. Pat. No. 3,677,789 and U.S. Pat.
  • Particularly useful overlay MCrAlY coatings are those consisting essentially of, by weight, approximately 8-30 percent chromium, 5-15 percent aluminum, up to 1 percent reactive metal selected from the group'consisting of yttrium, scandium, thorium and lanthanum and the other rare earth elements, balance selected from the group consisting of nickel, cobalt and nickel-cobalt, preferably applied to a thickness of approximately 0.005-0.006 inch.
  • the diffusion aluminide coatings are typically provided by reacting aluminum with the deoxidized surface of the article to be protected the aluminide layer being formed as a barrier zone of varying component concentration with consumption of the substrate components. This aluminide layer in turn oxidizes to form the inert barrier oxide.
  • Bungardt et alpatents a separate layer of metal from the platinum group is applied before the aluminum diffusion treatment.
  • the coating formed is nonhomogeneous and, with respect to platinum group metal content for example, there approvements, particularly for example, in hot-corrosion .resistance, has remained. 1
  • the present invention contemplates alloy compositions and more particularly nickel, cobalt and nickelcobalt coating alloy compositions having improved hot corrosion resistance.
  • the present invention contemplates an improved MCrAlY type alloy coating composition consisting essentially of, by weight, approximately 8-30 percent chromium, 5-15 percent aluminum, up to 1 percent reactive metal selected from the group consisting of yttrium, scandium, thorium and the other rare earth elements, and 3-12 percent of a noble metal selected from the group consisting of platinum or rhodium, the balance being se- 0 lected from the group consisting of nickel, cobalt and nickel-cobalt.
  • the inclusion of the noble metal as an alloying ingredient results in a substantially uniform dispersion thereof throughout the composition and thus retains the homogeneity which is characteristic of MCrAlY type overlay coatings.
  • the reactive metal is yttrium and the noble metal is 5-10 percent platinum. In another embodiment, the reactive metal is yttrium and the noble metal is 5 percent rhodium.
  • FIG. 4 is a graph showing the hot corrosion behavior of various CoCrAlY and NiCrAlY alloys at 1,750F 2.0 mg cm Na,SO and
  • FIG. 5 is a graph showing the hot corrosion behavior of NiCrAlY alloys at 1,750F 0.5 mg cm" Na,SO
  • the alloys of the present invention exhibit markedly improved hot corrosion resistance and are considered particularly useful as coatings on the contemporary superalloys.
  • the inventive alloys are in themselves corrosion resistant and do not depend for their protective effect upon a reaction with the substrate material. Inaddition, these alloys are uniform throughout their thickness and thus will exhibit their protective properties more continuously and consistently than do the aluminide coatings.
  • a basic alloy containing approximately, by weight, 8-30 percent chromium, 5-15 percent aluminum, 5-10 percent platinum "or rhodium, up to 1 percent reactive metal selected from the group consisting of yttrium, scandium, thorium and lanthanum and the other'rare earth elements, balance nickel and/or cobalt.
  • a preferred alloy composition utilizes 0.5 percent yttrium and 5-10 percent platinum.
  • La and the other rare earths which normally provide oxide adherence to the underlying substrate, would promote additional oxide adherence.
  • the alloy may I be applied as a coating to the surface to be protected, the presence of platinum or rhodium to'the coating alof platinum or rhodium.
  • the coatings may be accomplished by plasma spraying techniques.
  • EXAMPLE 2 Specimens were formed as in Example 1 to the compositions as shown inFIGS. 2 and 3. The specimens were subjected to high temperature cyclic oxidation tests and surprisingly, those containing platinum or rhodium, were found to have improved oxide adherence of the A1 formed on the alloys. It can be seen that the alloys with or weight percent Pt are supe-, rior to the 2.5 weight percent Pt alloy which, in turn, is significantly better than the unmodified alloy. Oxide adherence on a Ni-8Cr-6Al-5Rh alloy at l,200C was,
  • EXAMPLE 3 Alloy specimens having dimensions of 1 cm X 0.8 cm X 0.l-0.2 cm and compositions of Ni-l 7Cr-l2Al-0.5Y, Ni-17Cr-12Al-5Rh-O.5Y, Ni-l7Cr'l2Al-1OPt-O5Y, Co-l7Cr-l lAl-0.5Y, Co-l7Cr-1lAl-5Rh-O.5Y and Col7Cr-llAl-l0Pt-0.5Y were prepared, measured and.
  • EXAMPLE 4 Erosion bars of Ni-l'iCr-IZAl-QSY, Ni-l7Cr-l2Al 10pt-O.5Y were evaluated in a cyclic hot corrosion Y burner rig at 1,7530%" using 35 ppm of sea salt ingested in the fuel prior to combustion'Sevcre attack of the tip of both the NiCrAli base composition and the rho. dium modified composition occurredafter hours.
  • Hot zone failures were observed between300 and 400 hours for both these bars, the rhodium modified specimen surviving for a slightly longer time than the base composition. Although the rhodium modified composition showed little improvement over the base alloy in i this test, the nature of its failure was unusual and ren dered these results somewhat dubious and inconclusive. in contrast, the platinum modified compositions were found to be dramatically more resistant to hot corrosion than the base composition. For these compositions no sign of failure was observed up to 675 hours, when testing was terminated.
  • the invention of claim is 5 percent rhodium.
  • a coated article comprising a nickel-base or co-' halt-base superalloy, and an overlay coating thereon of the MCrAlY type wherein the coating composition consists essentially of, by weight, approximately 830 percent chromium, 5-15 percent aluminum, up to 1 percent reactive metal selected from the group consisting of yttrium, scandiurn, thorium and the other rare earth elements, 3-l2 percent of a noble metal selected from the group consisting of platinum or rhodium, balance selected from the group consisting of nickel, .cobalt and nickel-cobalt, said platinum or rhodium being:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Physical Vapour Deposition (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US487074A 1974-07-10 1974-07-10 MCrAlY type coating alloy Expired - Lifetime US3918139A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
US487074A US3918139A (en) 1974-07-10 1974-07-10 MCrAlY type coating alloy
GB23056/75A GB1500780A (en) 1974-07-10 1975-05-23 Mcraly type coating alloy
AU81560/75A AU487226B2 (en) 1974-07-10 1975-05-27 Mcraly type coating alloy
IN1079/CAL/1975A IN144076B (zh) 1974-07-10 1975-05-28
IL47407A IL47407A (en) 1974-07-10 1975-06-03 YIARCM type alloy
CH721275A CH606455A5 (zh) 1974-07-10 1975-06-04
SE7507095A SE410477B (sv) 1974-07-10 1975-06-19 Beleggningskomposition av mcraly-typ
CA000230272A CA1158075A (en) 1974-07-10 1975-06-26 Mcraly type coating alloy
IT24839/75A IT1039467B (it) 1974-07-10 1975-06-27 Leghe di rivestimento del tipo mcraly e metodo per la loro preparazione
NO75752355A NO141371C (no) 1974-07-10 1975-06-30 Belegglegering av mcraly-typen.
FR7520876A FR2277902A1 (fr) 1974-07-10 1975-07-03 Revetement en alliage du type mcraly
DE2530197A DE2530197C2 (de) 1974-07-10 1975-07-05 Überzugslegierung
JP50084341A JPS5842255B2 (ja) 1974-07-10 1975-07-09 Ｍｃｒａｌｙ ガタヒフクゴウキン
BR7504327*A BR7504327A (pt) 1974-07-10 1975-07-09 Composicao de revestimento do tipo mcraly,e processo para sua obtencao

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US487074A US3918139A (en) 1974-07-10 1974-07-10 MCrAlY type coating alloy

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US3918139A true US3918139A (en) 1975-11-11

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US487074A Expired - Lifetime US3918139A (en) 1974-07-10 1974-07-10 MCrAlY type coating alloy

Country Status (13)

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US (1) US3918139A (zh)
JP (1) JPS5842255B2 (zh)
BR (1) BR7504327A (zh)
CA (1) CA1158075A (zh)
CH (1) CH606455A5 (zh)
DE (1) DE2530197C2 (zh)
FR (1) FR2277902A1 (zh)
GB (1) GB1500780A (zh)
IL (1) IL47407A (zh)
IN (1) IN144076B (zh)
IT (1) IT1039467B (zh)
NO (1) NO141371C (zh)
SE (1) SE410477B (zh)

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US4123595A (en) * 1977-09-22 1978-10-31 General Electric Company Metallic coated article
US4123594A (en) * 1977-09-22 1978-10-31 General Electric Company Metallic coated article of improved environmental resistance
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US4162349A (en) * 1977-05-24 1979-07-24 United Technologies Corporation Fabrication of Co-Cr-Al-Y feed stock
USRE30995E (en) * 1977-06-09 1982-07-13 General Electric Company High integrity CoCrAl(Y) coated nickel-base superalloys
US4346137A (en) * 1979-12-19 1982-08-24 United Technologies Corporation High temperature fatigue oxidation resistant coating on superalloy substrate
DE3229285A1 (de) * 1981-08-05 1983-03-24 United Technologies Corp., 06101 Hartford, Conn. Belagzusammensetzung zur herstellung eines schutzbelags auf substraten aus einer superlegierung
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US4514469A (en) * 1981-09-10 1985-04-30 United Technologies Corporation Peened overlay coatings
US4615865A (en) * 1981-08-05 1986-10-07 United Technologies Corporation Overlay coatings with high yttrium contents
US4683119A (en) * 1974-07-08 1987-07-28 Johnson Matthey & Company, Limited Platinum group metal-containing alloy
US4711665A (en) * 1985-07-26 1987-12-08 Pennsylvania Research Corporation Oxidation resistant alloy
US4743514A (en) * 1983-06-29 1988-05-10 Allied-Signal Inc. Oxidation resistant protective coating system for gas turbine components, and process for preparation of coated components
US4897315A (en) * 1985-10-15 1990-01-30 United Technologies Corporation Yttrium enriched aluminide coating for superalloys
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US4910092A (en) * 1986-09-03 1990-03-20 United Technologies Corporation Yttrium enriched aluminide coating for superalloys
US4933239A (en) * 1989-03-06 1990-06-12 United Technologies Corporation Aluminide coating for superalloys
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US5277936A (en) * 1987-11-19 1994-01-11 United Technologies Corporation Oxide containing MCrAlY-type overlay coatings
US5455119A (en) * 1993-11-08 1995-10-03 Praxair S.T. Technology, Inc. Coating composition having good corrosion and oxidation resistance
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US20060210825A1 (en) * 2004-08-18 2006-09-21 Iowa State University High-temperature coatings and bulk alloys with Pt metal modified gamma-Ni + gamma'-Ni3Al alloys having hot-corrosion resistance
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AU8156075A (en) 1976-12-02
SE7507095L (sv) 1976-01-12
IN144076B (zh) 1978-03-18
JPS5130530A (en) 1976-03-15
NO752355L (zh) 1976-01-13
DE2530197A1 (de) 1976-01-29
CH606455A5 (zh) 1978-10-31
IL47407A (en) 1977-08-31
JPS5842255B2 (ja) 1983-09-19
GB1500780A (en) 1978-02-08
FR2277902A1 (fr) 1976-02-06
FR2277902B1 (zh) 1978-07-28
NO141371C (no) 1980-02-27
NO141371B (no) 1979-11-19
SE410477B (sv) 1979-10-15
IT1039467B (it) 1979-12-10
BR7504327A (pt) 1976-07-06
DE2530197C2 (de) 1983-02-03
CA1158075A (en) 1983-12-06
IL47407A0 (en) 1975-08-31

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