US3597172A - Alloys having an aluminum-diffused surface layer - Google Patents

Alloys having an aluminum-diffused surface layer Download PDF

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Publication number
US3597172A
US3597172A US701317A US3597172DA US3597172A US 3597172 A US3597172 A US 3597172A US 701317 A US701317 A US 701317A US 3597172D A US3597172D A US 3597172DA US 3597172 A US3597172 A US 3597172A
Authority
US
United States
Prior art keywords
aluminum
alloys
nickel
diffused
layer
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
Application number
US701317A
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English (en)
Inventor
Karl Bungardt
Gottfried Becker
Gunter Lehnert
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.)
Deutsche Edelstahlwerke AG
Original Assignee
Deutsche Edelstahlwerke AG
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 Deutsche Edelstahlwerke AG filed Critical Deutsche Edelstahlwerke AG
Application granted granted Critical
Publication of US3597172A publication Critical patent/US3597172A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/04—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from several pieces
    • 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
    • C23C10/02—Pretreatment of the material to be coated
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • 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.]
    • Y10T428/12736—Al-base component
    • Y10T428/1275—Next to Group VIII or IB 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
    • Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other
    • 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
    • Y10T428/12937—Co- or Ni-base component next to Fe-base component

Definitions

  • This invention relates to an improvement in the resistance to oxidation and corrosion of parts made of certain alloys, namely high temperature steels and nickel-based or cobalt-based alloys, having aluminum diffused into their surfaces.
  • the diffusion of aluminum into the surface of parts is a known method of improving the oxidation and corrosion resistance thereof.
  • the conventional procedure consists in packing the objects into a powder mixture substantially consisting of metallic aluminum and aluminum oxide as an inert component. By raising the temperature to between 1000 and 1100 C. the metallic aluminum can be made to diffuse into the surfaces of the parts and to form a diffusion layer which protects the parts against oxidation and corrosion during their subsequent use.
  • the invention relates to a further improvement of the known process of aluminum diffusion, in that high temperature steels, nickel-based alloys and cobalt-based alloys parts are provided with a nickel coating before they are submitted to the process of aluminum diffusion.
  • the accompanying drawing is a graphical illustration of the advantages obtainable by the process of the invention in comparison with untreated parts or with parts that have been submitted only to the aluminum diffusion treatment.
  • the ordinate of the said graph represents the loss in weight per unit of surface area by heating in still air at 1200 C., and the abscissa represents time.
  • the comparative tests were performed using a nickel based alloy containing 20% chromium, 2.4% titanium and 1.4% aluminum.
  • Aluminum was diffused into the surface by heating samples at 1100 C. for a period of 5 hours in a powder mixture containing 5% aluminum and 95% aluminum oxide.
  • the sample that was treated according to the invention was first degreased and pickled and before being subjected to the aluminum diffusion treatment it was electrolytically provided with a a coat- "ice ing of nickel by a minute treatment in a hydrochloric acid nickel chloride bath at 35 C. using a current density of 25 a./dm.
  • the thickness of the nickel coating is from 3 to 20 1, particularly from 5 to 10 1.
  • the thickness of the aluminum diffusion layer is preferably from 20 to 100M, Particularly from to 70.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
US701317A 1967-01-31 1968-01-29 Alloys having an aluminum-diffused surface layer Expired - Lifetime US3597172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0052148 1967-01-31

Publications (1)

Publication Number Publication Date
US3597172A true US3597172A (en) 1971-08-03

Family

ID=7053944

Family Applications (1)

Application Number Title Priority Date Filing Date
US701317A Expired - Lifetime US3597172A (en) 1967-01-31 1968-01-29 Alloys having an aluminum-diffused surface layer

Country Status (8)

Country Link
US (1) US3597172A (de)
BE (1) BE709691A (de)
CH (1) CH498205A (de)
DE (1) DE1621224B1 (de)
FR (1) FR1553233A (de)
GB (1) GB1166591A (de)
NL (1) NL6800878A (de)
SE (1) SE327321B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859061A (en) * 1973-04-23 1975-01-07 Chromalloy American Corp Corrosion resistant coating system for ferrous metal articles having brazed joints
US3884729A (en) * 1972-11-03 1975-05-20 British Steel Corp Method of providing an aluminum coating on a steel substrate
US3897222A (en) * 1971-06-02 1975-07-29 Standard Pressed Steel Co Protective coating for ferrous metals
US3898052A (en) * 1973-04-23 1975-08-05 Chromalloy American Corp Corrosion resistant coating system for ferrous metal articles having brazed joints
US4071659A (en) * 1975-11-13 1978-01-31 Texas Instruments Incorporated Solar absorption surface panel
US4087589A (en) * 1975-10-14 1978-05-02 General Electric Company Coated article
US4190493A (en) * 1975-02-26 1980-02-26 Sulzer Brothers Limited Coated structural component for a high temperature nuclear reactor
US4241147A (en) * 1978-10-23 1980-12-23 Alloy Surfaces Company, Inc. Diffusion aluminized age-hardenable stainless steel
JPS56273A (en) * 1979-06-14 1981-01-06 Mitsubishi Heavy Ind Ltd Diffusion-penetration method of alloy
US4260654A (en) * 1974-02-27 1981-04-07 Alloy Surfaces Company, Inc. Smooth coating
US5236788A (en) * 1990-02-02 1993-08-17 Mtu Motoren- Und Turbinen-Union Muenchen Gmbh Iron-base alloy structural component having a corrosion-inhibiting coating
US5270081A (en) * 1990-02-02 1993-12-14 Mtu Motoren-Und Turbinen-Union Muenchen Gmbh Iron-base alloy structural component having a corrosion-inhibiting coating, and method of producing the coating

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647517A (en) * 1970-06-22 1972-03-07 Chromalloy American Corp Impact resistant coatings for cobalt-base superalloys and the like
GB1397066A (en) * 1971-06-19 1975-06-11 Rolls Royce High temperature corrosion resistant alloys

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897222A (en) * 1971-06-02 1975-07-29 Standard Pressed Steel Co Protective coating for ferrous metals
US3884729A (en) * 1972-11-03 1975-05-20 British Steel Corp Method of providing an aluminum coating on a steel substrate
US3859061A (en) * 1973-04-23 1975-01-07 Chromalloy American Corp Corrosion resistant coating system for ferrous metal articles having brazed joints
US3898052A (en) * 1973-04-23 1975-08-05 Chromalloy American Corp Corrosion resistant coating system for ferrous metal articles having brazed joints
US4260654A (en) * 1974-02-27 1981-04-07 Alloy Surfaces Company, Inc. Smooth coating
US4190493A (en) * 1975-02-26 1980-02-26 Sulzer Brothers Limited Coated structural component for a high temperature nuclear reactor
US4087589A (en) * 1975-10-14 1978-05-02 General Electric Company Coated article
US4071659A (en) * 1975-11-13 1978-01-31 Texas Instruments Incorporated Solar absorption surface panel
US4241147A (en) * 1978-10-23 1980-12-23 Alloy Surfaces Company, Inc. Diffusion aluminized age-hardenable stainless steel
JPS56273A (en) * 1979-06-14 1981-01-06 Mitsubishi Heavy Ind Ltd Diffusion-penetration method of alloy
JPS5710182B2 (de) * 1979-06-14 1982-02-25
US5236788A (en) * 1990-02-02 1993-08-17 Mtu Motoren- Und Turbinen-Union Muenchen Gmbh Iron-base alloy structural component having a corrosion-inhibiting coating
US5270081A (en) * 1990-02-02 1993-12-14 Mtu Motoren-Und Turbinen-Union Muenchen Gmbh Iron-base alloy structural component having a corrosion-inhibiting coating, and method of producing the coating

Also Published As

Publication number Publication date
NL6800878A (de) 1968-08-01
CH498205A (de) 1970-10-31
SE327321B (de) 1970-08-17
FR1553233A (de) 1969-01-10
GB1166591A (en) 1969-10-08
BE709691A (de) 1968-05-30
DE1621224B1 (de) 1971-02-04

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