GB891578A - Process for carbo-nitriding metals, more especially iron alloys, in salt baths containing alkali cyanide and alkali cyanate - Google Patents

Process for carbo-nitriding metals, more especially iron alloys, in salt baths containing alkali cyanide and alkali cyanate

Info

Publication number
GB891578A
GB891578A GB23707/60A GB2370760A GB891578A GB 891578 A GB891578 A GB 891578A GB 23707/60 A GB23707/60 A GB 23707/60A GB 2370760 A GB2370760 A GB 2370760A GB 891578 A GB891578 A GB 891578A
Authority
GB
United Kingdom
Prior art keywords
cyanate
cyanide
carbo
alkali
iron alloys
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
GB23707/60A
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Deutsche Gold und Silber Scheideanstalt
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 Degussa GmbH, Deutsche Gold und Silber Scheideanstalt filed Critical Degussa GmbH
Publication of GB891578A publication Critical patent/GB891578A/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
    • 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
    • C23C8/42—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 only one element being applied
    • C23C8/48—Nitriding
    • C23C8/50—Nitriding of ferrous surfaces
    • 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

Abstract

A process for carbo-nitriding metals, particularly ferrous metals, in baths containing alkali metal cyanide and alkali metal cyanate comprises providing 0,5 to 10% of the total cyanate as n-cyanate. The bath may comprise 20-40% cyanate calculated as potassium cyanate, and 30-60% cyanide calculated as sodium cyanide, the balance being alkali metal carbonate. The bath may also contain alkali metal chloride. It is stated that the invention results in improvements in the fatigue strength of iron alloys.
GB23707/60A 1959-07-09 1960-07-06 Process for carbo-nitriding metals, more especially iron alloys, in salt baths containing alkali cyanide and alkali cyanate Expired GB891578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE891578X 1959-07-09

Publications (1)

Publication Number Publication Date
GB891578A true GB891578A (en) 1962-03-14

Family

ID=6845970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23707/60A Expired GB891578A (en) 1959-07-09 1960-07-06 Process for carbo-nitriding metals, more especially iron alloys, in salt baths containing alkali cyanide and alkali cyanate

Country Status (1)

Country Link
GB (1) GB891578A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397904A1 (en) * 1977-07-20 1979-02-16 Brico Eng PROCESS FOR THE MANUFACTURING OF ARTICLES FROM SINED METAL AND ARTICLES THEREFORE OBTAINED
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
FR2397904A1 (en) * 1977-07-20 1979-02-16 Brico Eng PROCESS FOR THE MANUFACTURING OF ARTICLES FROM SINED METAL AND ARTICLES THEREFORE OBTAINED
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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