ES302733A1 - Improvements in the production of a wear-resistant surface on ferrous metal parts - Google Patents

Improvements in the production of a wear-resistant surface on ferrous metal parts

Info

Publication number
ES302733A1
ES302733A1 ES0302733A ES302733A ES302733A1 ES 302733 A1 ES302733 A1 ES 302733A1 ES 0302733 A ES0302733 A ES 0302733A ES 302733 A ES302733 A ES 302733A ES 302733 A1 ES302733 A1 ES 302733A1
Authority
ES
Spain
Prior art keywords
calculated
production
sulphur
ferrous metal
metal parts
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
ES0302733A
Other languages
Spanish (es)
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Publication of ES302733A1 publication Critical patent/ES302733A1/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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

A process for the production on ferrous metal parts of a sulphurized nitrided surface layer comprising heating the parts to above 500 DEG C., preferably 560-580 DEG C. in a fused salt bath containing an alkali metal cyanide, cyanate, chloride and carbonate and active sulphur (i.e. sulphur which shows up in analysis for sulphide) which may be added in the form of a sulphite, sulphide, thiosulphate or thiocyanate of an alkali metal. The proportion by weight of cyanide is 0.5-30% (calculated as NaCN), of cyanate 10-25% (calculated as NaCNO), of chloride 20-50% (calculated as KCl) and of sulphur 0.05-0.4% (calculated as S). Case hardened steel is treated for 5-180 minutes and the bath covered with a floating layer of graphite and is then quenched or cooled in air or town gas.
ES0302733A 1963-08-02 1964-08-01 Improvements in the production of a wear-resistant surface on ferrous metal parts Expired ES302733A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3071163A GB1020534A (en) 1963-08-02 1963-08-02 Improvements in the production of a wear-resistant surface on ferrous metal parts

Publications (1)

Publication Number Publication Date
ES302733A1 true ES302733A1 (en) 1965-02-16

Family

ID=10311943

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0302733A Expired ES302733A1 (en) 1963-08-02 1964-08-01 Improvements in the production of a wear-resistant surface on ferrous metal parts

Country Status (5)

Country Link
BE (1) BE651194A (en)
DK (1) DK120624B (en)
ES (1) ES302733A1 (en)
GB (1) GB1020534A (en)
NL (1) NL6408703A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561667B1 (en) * 1984-03-20 1986-09-12 Stephanois Rech Mec SALT BATH TREATMENT PROCESS FOR IMPROVING CORROSION RESISTANCE OF FERROUS METAL PARTS THAT HAVE BEEN SUBJECT TO THERMOCHEMICAL TREATMENT
FR2708623B1 (en) * 1993-08-06 1995-10-20 Stephanois Rech Mec Nitriding process for ferrous metal parts, with improved corrosion resistance.

Also Published As

Publication number Publication date
BE651194A (en) 1965-02-01
DK120624B (en) 1971-06-21
NL6408703A (en) 1965-02-03
GB1020534A (en) 1966-02-23

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