GB406346A - Improvements in or relating to the case hardening of iron, steel and alloy steels - Google Patents

Improvements in or relating to the case hardening of iron, steel and alloy steels

Info

Publication number
GB406346A
GB406346A GB23743/32A GB2374332A GB406346A GB 406346 A GB406346 A GB 406346A GB 23743/32 A GB23743/32 A GB 23743/32A GB 2374332 A GB2374332 A GB 2374332A GB 406346 A GB406346 A GB 406346A
Authority
GB
United Kingdom
Prior art keywords
parts
iron
steel
alloy steels
chloride
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
GB23743/32A
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.)
Roessler and Hasslacher Chemical Co
Original Assignee
Roessler and Hasslacher Chemical Co
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 Roessler and Hasslacher Chemical Co filed Critical Roessler and Hasslacher Chemical Co
Publication of GB406346A publication Critical patent/GB406346A/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
    • 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)
  • Electrolytic Production Of Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Iron, steel and alloy steels are case-hardened by treating them in a fused salt bath containing 30-60 per cent by weight of barium chloride and 10-20 of sodium cyanide, the balance consisting essentially of alkali metal salts such as chlorides or carbonates which are added for the purpose of lowering the melting point and increasing the fluidity of the mixture. The treatment is carried out at a temperature below 900 DEG C. Small amounts not exceeding 5 per cent by weight of strontium or magnesium salts may also be added to the bath. In an example the bath consists of a mixture of 55 parts of barium chloride, 25 parts potassium chloride, 20 parts of sodium chloride and 20 parts of sodium cyanide. Specifications 349,547, and 359,483 (as open to inspection under Sect. 91) are referred to.
GB23743/32A 1931-08-24 1932-08-24 Improvements in or relating to the case hardening of iron, steel and alloy steels Expired GB406346A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US406346XA 1931-08-24 1931-08-24

Publications (1)

Publication Number Publication Date
GB406346A true GB406346A (en) 1934-02-26

Family

ID=21912074

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23743/32A Expired GB406346A (en) 1931-08-24 1932-08-24 Improvements in or relating to the case hardening of iron, steel and alloy steels

Country Status (1)

Country Link
GB (1) GB406346A (en)

Similar Documents

Publication Publication Date Title
GB406346A (en) Improvements in or relating to the case hardening of iron, steel and alloy steels
US2248732A (en) Process for the hardening of steel
GB442859A (en) Process for cleaning or descaling metal
GB792421A (en) Improvements in or relating to the treatment of metal
US1970852A (en) Process and composition for treating metals
GB486232A (en) Improvements in case-hardening iron and steel and in salt baths therefor
GB854349A (en) Improvements in or relating to fused sale baths
GB497510A (en) Improvements in and relating to welding fluxes and flux-coated electrodes
GB646645A (en) A process for simultaneously diffusing metals and carbon into iron and steel
US1952090A (en) Case-hardening metals
SU37602A1 (en) The method of cementation of steel, iron, etc.
GB437494A (en) Improved process for the carburisation of iron and steel articles in fused salt baths
GB458892A (en) Improvements in processes for the manufacture of titanium tetrachloride
GB426207A (en) Improvements in or relating to the case hardening of alloy steels by nitrogenisation
US1518607A (en) Treatment of case-hardening baths
GB414092A (en) Improvements in or relating to the case hardening of iron, steel and alloy steels
GB434531A (en) Improvements in coating iron or steel with aluminium or an alloy thereof
GB432815A (en) Improvements in heat treatment of aluminium alloys
GB382691A (en) Process for modifying aluminium and alloys consisting mainly or partly of aluminium without any added silicon
GB484480A (en) An improved melt bath for the heat treatment of metals and alloys
GB409380A (en) Improvements in or relating to iron alloys
GB359483A (en) Process for the cementation and hardening of iron, steel and alloys containing the same
GB467378A (en) Improvements in or relating to a process for the manufacture of basic steel
GB813134A (en) Improvements in or relating to fused salt baths
GB450447A (en) Improved process for annealing or heat treating metal or metal articles