GB1031602A - Formation of coatings on ferrous metal substrates - Google Patents

Formation of coatings on ferrous metal substrates

Info

Publication number
GB1031602A
GB1031602A GB3915763A GB3915763A GB1031602A GB 1031602 A GB1031602 A GB 1031602A GB 3915763 A GB3915763 A GB 3915763A GB 3915763 A GB3915763 A GB 3915763A GB 1031602 A GB1031602 A GB 1031602A
Authority
GB
United Kingdom
Prior art keywords
powder
coating
chromising
compacted
inch
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
GB3915763A
Inventor
George Mchardy Sturgeon
Brian Michael Armstrong
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.)
British Iron and Steel Research Association BISRA
Original Assignee
British Iron and Steel Research Association BISRA
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 British Iron and Steel Research Association BISRA filed Critical British Iron and Steel Research Association BISRA
Priority to GB3915763A priority Critical patent/GB1031602A/en
Publication of GB1031602A publication Critical patent/GB1031602A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
    • B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Powder Metallurgy (AREA)

Abstract

A stainless steel coating is formed on a ferrous substrate by applying a coating of Ni powder to the substrate compacting the powder and finally diffusing Cr into the coating at a temperature high enough to allow interdiffusion of the Ni, Fe and Cr. In a modification a coating of Ni and Cr powder may be applied, compacted and then heated to effect interdiffusion. It is preferred to add Fe powder with the Ni powder, the mixture containing 10%-20% Ni and the powder being applied dry or wet, as a paste or slurry from a metering device or by electrostatic or electrophonetic deposition. The coating is compacted by rolling and is sintered at 750 DEG C. in hydrogen or cracked ammonia prior to chromising. The chromising process is the conventional halide pack or gas process at 800 DEG -1400 DEG C. In addition to Cr, Fe may also be deposited by using Fe/Cr in the diffusing pack. In the modified process a powder coating of a Fe/Ni alloy and Cr powder is preferred and after compacting, diffusion is effected at 1000 DEG C. for 6 hours in hydrogen or cracked ammonia. The metal powders should have a particle size of 5-100 microns and the ferrous substrate a maximum C content of 0.15%. The chromising inter-diffusion step is preferably carried out using H.F. heating which causes less grain growth. The final coating has a thickness of 0.001 inch -0.004 inch.
GB3915763A 1963-10-04 1963-10-04 Formation of coatings on ferrous metal substrates Expired GB1031602A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3915763A GB1031602A (en) 1963-10-04 1963-10-04 Formation of coatings on ferrous metal substrates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3915763A GB1031602A (en) 1963-10-04 1963-10-04 Formation of coatings on ferrous metal substrates

Publications (1)

Publication Number Publication Date
GB1031602A true GB1031602A (en) 1966-06-02

Family

ID=10407981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3915763A Expired GB1031602A (en) 1963-10-04 1963-10-04 Formation of coatings on ferrous metal substrates

Country Status (1)

Country Link
GB (1) GB1031602A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064542A1 (en) * 1980-11-17 1982-11-17 Turbine Metal Technology Inc. Improved interdispersed phase coatings method
FR2529911A1 (en) * 1982-07-08 1984-01-13 Snecma Process and device for the production of metallic protective coatings

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064542A1 (en) * 1980-11-17 1982-11-17 Turbine Metal Technology Inc. Improved interdispersed phase coatings method
EP0064542A4 (en) * 1980-11-17 1983-11-21 Turbine Metal Technology Inc Improved interdispersed phase coatings method.
FR2529911A1 (en) * 1982-07-08 1984-01-13 Snecma Process and device for the production of metallic protective coatings

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