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GB1105031A - A salt bath for nitriding steel and cast iron - Google Patents

A salt bath for nitriding steel and cast iron

Info

Publication number
GB1105031A
GB1105031A GB1139865A GB1139865A GB1105031A GB 1105031 A GB1105031 A GB 1105031A GB 1139865 A GB1139865 A GB 1139865A GB 1139865 A GB1139865 A GB 1139865A GB 1105031 A GB1105031 A GB 1105031A
Authority
GB
United Kingdom
Prior art keywords
cast iron
sodium
potassium
salt bath
nitriding steel
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
GB1139865A
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 GB1105031A publication Critical patent/GB1105031A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

A fused salt bath for nitriding steel and cast iron contains potassium and sodium ions and cyanide and cyanate ions, the weight ratio of potassium to sodium being from 1:1 to 1.857:1. A typical composition consists by weight of 38-44% sodium cyanide, 43-47% potassium cyanate, 2-6% sodium carbonate and 10-14% potassium carbonate. A titanium lined crucible is used to hold the fused salt and air or any oxygen containing gas is passed into the bath.
GB1139865A 1964-04-11 1965-03-17 A salt bath for nitriding steel and cast iron Expired GB1105031A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1964D0044137 DE1280018B (en) 1964-04-11 1964-04-11 Salt bath and process for nitriding steel and cast iron

Publications (1)

Publication Number Publication Date
GB1105031A true GB1105031A (en) 1968-03-06

Family

ID=7048109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1139865A Expired GB1105031A (en) 1964-04-11 1965-03-17 A salt bath for nitriding steel and cast iron

Country Status (6)

Country Link
AT (1) AT261657B (en)
CH (1) CH455439A (en)
DE (1) DE1280018B (en)
GB (1) GB1105031A (en)
NL (1) NL143623B (en)
SE (1) SE319951B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1308534A1 (en) * 2001-11-02 2003-05-07 Kolene Corporation Low temperature nitrocarburizing salt and method of use

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022204A (en) * 1961-03-20 1962-02-20 Kolene Corp Process for nitriding metals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1308534A1 (en) * 2001-11-02 2003-05-07 Kolene Corporation Low temperature nitrocarburizing salt and method of use
US6746546B2 (en) 2001-11-02 2004-06-08 Kolene Corporation Low temperature nitriding salt and method of use

Also Published As

Publication number Publication date
CH455439A (en) 1968-07-15
NL6504550A (en) 1965-10-12
AT261657B (en) 1968-05-10
SE319951B (en) 1970-01-26
NL143623B (en) 1974-10-15
DE1280018B (en) 1968-10-10

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