GB981794A - Diffusion coating of metals - Google Patents

Diffusion coating of metals

Info

Publication number
GB981794A
GB981794A GB1781061A GB1781061A GB981794A GB 981794 A GB981794 A GB 981794A GB 1781061 A GB1781061 A GB 1781061A GB 1781061 A GB1781061 A GB 1781061A GB 981794 A GB981794 A GB 981794A
Authority
GB
United Kingdom
Prior art keywords
pack
fluoride
balance
diffusion
alloy
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
Application number
GB1781061A
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.)
Chromalloy Corp
Original Assignee
Chromalloy 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
Priority claimed from US29150A external-priority patent/US3073015A/en
Priority claimed from US29151A external-priority patent/US3096205A/en
Application filed by Chromalloy Corp filed Critical Chromalloy Corp
Publication of GB981794A publication Critical patent/GB981794A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/52—Embedding in a powder mixture, i.e. pack cementation more than one element being diffused in one step
    • C23C10/54—Diffusion of at least chromium
    • C23C10/56—Diffusion of at least chromium and at least aluminium
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Powder Metallurgy (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

A heat resistant "super alloy" consisting by weight of a major part of Ni and/or Co is coated with a diffusion layer by heating to 1650-2100 DEG F. in a diffusion pack including Cr, Al and Si and a vaporizable halogen material as a carrier. The diffusion pack contains 15-50% Cr, 1-20% Al, 0.5-15% Si, a filler such as Al2O3 and a halogen source such as the iodide, fluoride or hydrogen fluoride of ammonia or chromous fluoride. The Cr, Al and Si content of the pack should be 5-60% by weight of pack and the coating which is 0.001-0.002 inch thick consists of 90% Al, 5% Cr, 5% Si. With a part of the halogen source as a fluoride the pack can be reused for several coating operations, the fluoride acting as a regenerator. The alloy to be coated is embedded in the dry pack, sealed in an iron retort and heated for 4-20 hours at 1650-2100 DEG F. An alloy suitable for the vanes of a gas turbine engine contains 55% Co, 24.5% Cr, 10.5% Ni, 7.5% W and 0.5% C. Other alloys treated are: 0.12% C, 19% Cr, 1% Fe, 4% Mo, 3% Al, 3% Ti and balance Ni; 0.5% C, 24.5% Cr, 10.5% Ni, 7.4% W, 55% Co and balance Fe; 0.1% C, 20% Cr, 10% Ni, 15% W, 50% Co and balance Fe. Specification 911,414 is referred to.
GB1781061A 1960-05-16 1961-05-16 Diffusion coating of metals Expired GB981794A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US29150A US3073015A (en) 1960-05-16 1960-05-16 Diffusion coating of metals
US29151A US3096205A (en) 1960-05-16 1960-05-16 Diffusion coating of metals

Publications (1)

Publication Number Publication Date
GB981794A true GB981794A (en) 1965-01-27

Family

ID=26704607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1781061A Expired GB981794A (en) 1960-05-16 1961-05-16 Diffusion coating of metals

Country Status (4)

Country Link
CH (1) CH433901A (en)
DE (1) DE1446117C3 (en)
GB (1) GB981794A (en)
SE (1) SE303655B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4244306C1 (en) * 1992-12-28 1994-03-17 Astol Oberflaechenveredelung G Diffusion layering of metal components subjected to aggressive media - uses a powder mixture in a hermetically sealed container which can be recovered and recycled
US5939144A (en) * 1996-10-25 1999-08-17 Jamar Venture Corporation Method and composition for diffusion treatment of ceramic materials
WO2006071507A1 (en) * 2004-12-29 2006-07-06 Honeywell International Inc. Low cost inovative diffused mcraly coatings

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001000989A1 (en) * 1999-06-24 2001-01-04 Antoine Jocelyn Carcasse Device and method for accumulating mechanical energy

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4244306C1 (en) * 1992-12-28 1994-03-17 Astol Oberflaechenveredelung G Diffusion layering of metal components subjected to aggressive media - uses a powder mixture in a hermetically sealed container which can be recovered and recycled
US5939144A (en) * 1996-10-25 1999-08-17 Jamar Venture Corporation Method and composition for diffusion treatment of ceramic materials
WO2006071507A1 (en) * 2004-12-29 2006-07-06 Honeywell International Inc. Low cost inovative diffused mcraly coatings

Also Published As

Publication number Publication date
DE1446117B2 (en) 1970-12-03
DE1446117A1 (en) 1969-03-20
DE1446117C3 (en) 1976-01-02
SE303655B (en) 1968-09-02
CH433901A (en) 1967-04-15

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