GB437494A - Improved process for the carburisation of iron and steel articles in fused salt baths - Google Patents

Improved process for the carburisation of iron and steel articles in fused salt baths

Info

Publication number
GB437494A
GB437494A GB1170634A GB1170634A GB437494A GB 437494 A GB437494 A GB 437494A GB 1170634 A GB1170634 A GB 1170634A GB 1170634 A GB1170634 A GB 1170634A GB 437494 A GB437494 A GB 437494A
Authority
GB
United Kingdom
Prior art keywords
bath
carbide
iron
fused salt
carburisation
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
GB1170634A
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
Priority to GB1170634A priority Critical patent/GB437494A/en
Publication of GB437494A publication Critical patent/GB437494A/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
    • C23C8/44—Carburising
    • C23C8/46—Carburising 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)
  • Carbon And Carbon Compounds (AREA)

Abstract

Iron and steel articles are carburized by heating them in a fused salt bath comprising one or more alkali or alkaline earth halides other than fluorides together with an alkaline earth carbide such as calcium carbide. The carbide content of the bath is so adjusted as to be at least 2 per cent calculated on the weight of the bath. The bath may consist of mixture of potassium and sodium chlorides or calcium and sodium chlorides and calcium carbide. During the working, the carbide may be added in small quantities at short intervals e.g. additions of 2-6 per cent by weight of the bath at half-hourly intervals. Specification 421,104 is referred to.
GB1170634A 1934-04-19 1934-04-19 Improved process for the carburisation of iron and steel articles in fused salt baths Expired GB437494A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1170634A GB437494A (en) 1934-04-19 1934-04-19 Improved process for the carburisation of iron and steel articles in fused salt baths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1170634A GB437494A (en) 1934-04-19 1934-04-19 Improved process for the carburisation of iron and steel articles in fused salt baths

Publications (1)

Publication Number Publication Date
GB437494A true GB437494A (en) 1935-10-21

Family

ID=9991187

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1170634A Expired GB437494A (en) 1934-04-19 1934-04-19 Improved process for the carburisation of iron and steel articles in fused salt baths

Country Status (1)

Country Link
GB (1) GB437494A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115992338A (en) * 2022-12-13 2023-04-21 武汉大学 Method for preparing carbide coating by salt bath carbonization of transition metal surface

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115992338A (en) * 2022-12-13 2023-04-21 武汉大学 Method for preparing carbide coating by salt bath carbonization of transition metal surface
CN115992338B (en) * 2022-12-13 2023-10-24 武汉大学 Method for preparing carbide coating by salt bath carbonization of transition metal surface

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