GB982455A - Method of producing steel having uniformly distributed nitrogen - Google Patents

Method of producing steel having uniformly distributed nitrogen

Info

Publication number
GB982455A
GB982455A GB1968162A GB1968162A GB982455A GB 982455 A GB982455 A GB 982455A GB 1968162 A GB1968162 A GB 1968162A GB 1968162 A GB1968162 A GB 1968162A GB 982455 A GB982455 A GB 982455A
Authority
GB
United Kingdom
Prior art keywords
uniformly distributed
nitrogen
nitrogenizing
atmosphere
heating
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
GB1968162A
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.)
United States Steel Corp
Original Assignee
United States Steel 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 United States Steel Corp filed Critical United States Steel Corp
Publication of GB982455A publication Critical patent/GB982455A/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
    • C23C8/06—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 gases
    • C23C8/08—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 gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—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

Steel which is free of strong nitride-formers such as chromium, molybdenum and aluminium is given a uniformly distributed content of nitrogen by first heating it in a nitrogenizing atmosphere to produce a nitrogen-rich outer case, and then heating it to a temperature above its recrystallization temperature in a substantially non-nitrogenizing atmosphere to cause diffusion. Nitrogenizing may be carried out in an atmosphere of ammonia, possibly during heating to the final treatment temperature which may be at 1000-1350 DEG F. for 1/2 -\ba3/4 hour. The steel may be treated in the form of open coils.
GB1968162A 1961-05-23 1962-05-22 Method of producing steel having uniformly distributed nitrogen Expired GB982455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11207561A 1961-05-23 1961-05-23

Publications (1)

Publication Number Publication Date
GB982455A true GB982455A (en) 1965-02-03

Family

ID=22341989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1968162A Expired GB982455A (en) 1961-05-23 1962-05-22 Method of producing steel having uniformly distributed nitrogen

Country Status (4)

Country Link
DE (1) DE1265531B (en)
FR (1) FR1322726A (en)
GB (1) GB982455A (en)
NL (1) NL278790A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4330641A1 (en) * 1993-09-10 1995-03-16 Schaeffler Waelzlager Kg Component part made of an iron material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4330641A1 (en) * 1993-09-10 1995-03-16 Schaeffler Waelzlager Kg Component part made of an iron material

Also Published As

Publication number Publication date
NL278790A (en)
DE1265531B (en) 1968-04-04
FR1322726A (en) 1963-03-29

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