ES8606522A1 - A non-cyanide salt bath and process for carburization of ferrous metals and alloys. - Google Patents

A non-cyanide salt bath and process for carburization of ferrous metals and alloys.

Info

Publication number
ES8606522A1
ES8606522A1 ES539095A ES539095A ES8606522A1 ES 8606522 A1 ES8606522 A1 ES 8606522A1 ES 539095 A ES539095 A ES 539095A ES 539095 A ES539095 A ES 539095A ES 8606522 A1 ES8606522 A1 ES 8606522A1
Authority
ES
Spain
Prior art keywords
carburization
alloys
salt bath
ferrous metals
mixture
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
ES539095A
Other languages
Spanish (es)
Other versions
ES539095A0 (en
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.)
Heatbath Corp
Original Assignee
Heatbath Corp
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 Heatbath Corp filed Critical Heatbath Corp
Publication of ES8606522A1 publication Critical patent/ES8606522A1/en
Publication of ES539095A0 publication Critical patent/ES539095A0/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)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

A non-cyanide molten salt bath composition for the carburization of objects made of ferrous metals or alloys at a temperature in the range of 900-1050 DEG C comprises: (a) 85-99% of an alkali metal chloride or a mixture of alkali metal chlorides (b) 0.25-8% of an activator, which is an oxygen containing compound barium and/or strontium compound and (c) sufficient amount of finely divided graphite to provide a continuous cover on the surface of the molten salt mixture. The ferrous metal or alloy part is immersed in the molten mixture at a temperature in the range of 900 DEG C to 1050 DEG C.
ES539095A 1983-12-28 1984-12-27 A non-cyanide salt bath and process for carburization of ferrous metals and alloys. Expired ES8606522A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56628883A 1983-12-28 1983-12-28

Publications (2)

Publication Number Publication Date
ES8606522A1 true ES8606522A1 (en) 1986-04-01
ES539095A0 ES539095A0 (en) 1986-04-01

Family

ID=24262267

Family Applications (1)

Application Number Title Priority Date Filing Date
ES539095A Expired ES8606522A1 (en) 1983-12-28 1984-12-27 A non-cyanide salt bath and process for carburization of ferrous metals and alloys.

Country Status (3)

Country Link
EP (1) EP0147011A3 (en)
CA (1) CA1244748A (en)
ES (1) ES8606522A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6093303A (en) 1998-08-12 2000-07-25 Swagelok Company Low temperature case hardening processes
US6165597A (en) * 1998-08-12 2000-12-26 Swagelok Company Selective case hardening processes at low temperature
US6547888B1 (en) 2000-01-28 2003-04-15 Swagelok Company Modified low temperature case hardening processes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE627008C (en) * 1931-12-13 1936-03-06 Degussa Cementation bath consisting of indifferent salts, finely divided coal and non-cementing alkaline substances
US2492803A (en) * 1946-03-23 1949-12-27 Du Pont Carburizing steel articles
CA944665A (en) * 1971-10-06 1974-04-02 Park Chemical Company Cyanide free carburizing composition apparatus and process

Also Published As

Publication number Publication date
CA1244748A (en) 1988-11-15
ES539095A0 (en) 1986-04-01
EP0147011A3 (en) 1986-03-26
EP0147011A2 (en) 1985-07-03

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20010402