GB961020A - Process for the manufacture of an iron-chromium alloy - Google Patents

Process for the manufacture of an iron-chromium alloy

Info

Publication number
GB961020A
GB961020A GB2589459A GB2589459A GB961020A GB 961020 A GB961020 A GB 961020A GB 2589459 A GB2589459 A GB 2589459A GB 2589459 A GB2589459 A GB 2589459A GB 961020 A GB961020 A GB 961020A
Authority
GB
United Kingdom
Prior art keywords
iron
chromium
chromium alloy
manufacture
box
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
GB2589459A
Inventor
Eric George Weatherley
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.)
Metal Diffusions Ltd
Original Assignee
Metal Diffusions Ltd
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 Metal Diffusions Ltd filed Critical Metal Diffusions Ltd
Priority to GB2589459A priority Critical patent/GB961020A/en
Publication of GB961020A publication Critical patent/GB961020A/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
    • C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
    • C23C10/38—Chromising
    • C23C10/40—Chromising of ferrous surfaces
    • C23C10/42—Chromising of ferrous surfaces in the presence of volatile transport additives, e.g. halogenated substances

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

An iron-chromium alloy is produced by subjecting a sheet of mild steel or wrought iron to chromium diffusion in the presence of nitrous oxide under conditions such that not less than 20% by weight of the iron is replaced by chromium. The sheet is preferably not more than 0.008 inch thick and should not contain more than 0.05%P, 0.05%S, 0.5%Mn, 0.15%Si and 0.12%C. The diffusion is effected in a box, sealed as described in Specification 939,801 and filled with a mixture of sand, chromium powder and ammonium nitrate (to generate the nitrous oxide). The mixture may also contain ammonium chloride and ammonium fluoride. After heating to 1050-1400 DEG C. the box may be cooled under the canopy described in Specification 909,137.
GB2589459A 1959-07-28 1959-07-28 Process for the manufacture of an iron-chromium alloy Expired GB961020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2589459A GB961020A (en) 1959-07-28 1959-07-28 Process for the manufacture of an iron-chromium alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2589459A GB961020A (en) 1959-07-28 1959-07-28 Process for the manufacture of an iron-chromium alloy

Publications (1)

Publication Number Publication Date
GB961020A true GB961020A (en) 1964-06-17

Family

ID=10235087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2589459A Expired GB961020A (en) 1959-07-28 1959-07-28 Process for the manufacture of an iron-chromium alloy

Country Status (1)

Country Link
GB (1) GB961020A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998011269A1 (en) * 1996-09-12 1998-03-19 Alon, Inc. Chromium and silicon diffusion coating

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998011269A1 (en) * 1996-09-12 1998-03-19 Alon, Inc. Chromium and silicon diffusion coating
US5972429A (en) * 1996-09-12 1999-10-26 Alon, Inc. Chromium-silicon diffusion coating

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