GB1052668A - - Google Patents

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Publication number
GB1052668A
GB1052668A GB1052668DA GB1052668A GB 1052668 A GB1052668 A GB 1052668A GB 1052668D A GB1052668D A GB 1052668DA GB 1052668 A GB1052668 A GB 1052668A
Authority
GB
United Kingdom
Prior art keywords
chromium
carbo
cyanate
nickel
alkali metal
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.)
Active
Application number
Publication of GB1052668A publication Critical patent/GB1052668A/en
Active legal-status Critical Current

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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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
    • C23C8/52—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions more than one element being applied in one step
    • C23C8/54—Carbo-nitriding
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
    • C23C8/52—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions more than one element being applied in one step
    • C23C8/54—Carbo-nitriding
    • C23C8/56—Carbo-nitriding of ferrous surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Cookers (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

1,052,668. Carbo-nitriding ferrous metals. IMPERIAL CHEMICAL INDUSTRIES Ltd. Nov. 23, 1965 [Dec.4, 1964], No.49431/64. Heading C7U. Ferrous metals are carbo-nitrided at 600‹- 750‹C in a fused salt both containing alkali metal cyanide, cyanate and carbonate, and optionally an alkali metal chloride, the both containing at least 10% of cyanate calculated as NaCNO and being held in a container at least the inner surface of which consists of an alloy steel containing either (a) 12-35% of chromium or (b) 12-18% of chromium together with 4-7% of aluminium or (c) at least 10% of chromium together with at least 6% of nickel, the combined total of nickel and chromium not exceeding 80%. The bath may be electrically heated by immersed electrodes, at least the outer surfaces of which are formed from one of the above alloys.
GB1052668D Active GB1052668A (en)

Publications (1)

Publication Number Publication Date
GB1052668A true GB1052668A (en)

Family

ID=1757133

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1052668D Active GB1052668A (en)

Country Status (1)

Country Link
GB (1) GB1052668A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753799A (en) * 1971-03-31 1973-08-21 Lucas Ltd Joseph Heat treatment of alloy steel parts
WO2012146839A1 (en) 2011-03-11 2012-11-01 H.E.F. Molten-salt bath for nitriding mechanical steel parts, and implementation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753799A (en) * 1971-03-31 1973-08-21 Lucas Ltd Joseph Heat treatment of alloy steel parts
WO2012146839A1 (en) 2011-03-11 2012-11-01 H.E.F. Molten-salt bath for nitriding mechanical steel parts, and implementation method
US9611534B2 (en) 2011-03-11 2017-04-04 H.E.F. Molten-salt bath for nitriding mechanical parts made of steel, and implementation method

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