GB592945A - Improvements in or relating to the surface treatment of steel - Google Patents

Improvements in or relating to the surface treatment of steel

Info

Publication number
GB592945A
GB592945A GB1999844A GB1999844A GB592945A GB 592945 A GB592945 A GB 592945A GB 1999844 A GB1999844 A GB 1999844A GB 1999844 A GB1999844 A GB 1999844A GB 592945 A GB592945 A GB 592945A
Authority
GB
United Kingdom
Prior art keywords
per cent
steel
heating
nitriding
hardening
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
GB1999844A
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.)
Individual
Original Assignee
Individual
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB592945A publication Critical patent/GB592945A/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
    • 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)
  • Springs (AREA)

Abstract

Spring steel or a component made of spring steel is treated to enable it to withstand high temperature without substantial loss of resilience by hardening and tempering in the usual manner and subsequently hardening the surface by gas or liquid nitriding. The nitriding may be carried out by heating to 475 DEG to 550 DEG C. in ammonia or in a bath containing a mixture of potassium and sodium cyanides for 10 to 24 hours. As an example, a spring made of a chrome vanadium steel of the following composition: carbon, .4 to .5 per cent; silicon, not more than .3 per cent; manganese, .5 to .7 per cent; sulphur, not more than .04 per cent; phosphorus, not more than .04 per cent; chromium, 1.0 to 1.5 per cent; vanadium, .15 to .3 per cent; copper, not more than .15 per cent; nickel, trace, may be hardened by heating to 860 DEG to 890 DEG C. and quenching in oil, tempered at 400 DEG to 430 DEG C. and then nitrided as above.
GB1999844A 1944-10-16 Improvements in or relating to the surface treatment of steel Expired GB592945A (en)

Publications (1)

Publication Number Publication Date
GB592945A true GB592945A (en) 1947-10-03

Family

ID=1735144

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1999844A Expired GB592945A (en) 1944-10-16 Improvements in or relating to the surface treatment of steel

Country Status (1)

Country Link
GB (1) GB592945A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1476691B1 (en) * 2002-04-10 2005-05-11 Christian Bauer GmbH & Co. Connecting device of two hot pipe flanges of the exhaust pipes of an internal combustion engine
EP2546380A1 (en) * 2010-03-11 2013-01-16 Nippon Steel Corporation High-strength steel and high-strength bolt with excellent resistance to delayed fracture, and manufacturing method therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1476691B1 (en) * 2002-04-10 2005-05-11 Christian Bauer GmbH & Co. Connecting device of two hot pipe flanges of the exhaust pipes of an internal combustion engine
EP2546380A1 (en) * 2010-03-11 2013-01-16 Nippon Steel Corporation High-strength steel and high-strength bolt with excellent resistance to delayed fracture, and manufacturing method therefor
EP2546380A4 (en) * 2010-03-11 2013-12-25 Nippon Steel & Sumitomo Metal Corp High-strength steel and high-strength bolt with excellent resistance to delayed fracture, and manufacturing method therefor
US8951365B2 (en) 2010-03-11 2015-02-10 Nippon Steel & Sumitomo Metal Corporation High strength steel and high strength bolt excellent in delayed fracture resistance and methods of production of same

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