GB648242A - Graphitic alloy steels and nitrided products made therefrom - Google Patents

Graphitic alloy steels and nitrided products made therefrom

Info

Publication number
GB648242A
GB648242A GB11437/45A GB1143745A GB648242A GB 648242 A GB648242 A GB 648242A GB 11437/45 A GB11437/45 A GB 11437/45A GB 1143745 A GB1143745 A GB 1143745A GB 648242 A GB648242 A GB 648242A
Authority
GB
United Kingdom
Prior art keywords
per cent
heating
sufficient time
steel
products made
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
GB11437/45A
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.)
LITRALLOY Ltd
Original Assignee
LITRALLOY Ltd
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 LITRALLOY Ltd filed Critical LITRALLOY Ltd
Publication of GB648242A publication Critical patent/GB648242A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

A graphitizible alloy steel has the following composition C 1.0-2.0 per cent, Mn 0.2 -1.0 per cent, A1 0.5-2.5 per cent, Si 0.5-1.75 per cent, Cr 0.2-1.0 per cent, Fe, with the usual impurities, the remainder. The alloy may also contain one or more of the following elements: V 0.1-0.3 per cent, Zr up to 0.5 per cent, Nb up to 0.3 per cent and Cu 0.25-1.5 per cent. The steels are graphitized by heating to above the AC3 point for sufficient time to produce an austenitic structure, cooling rapidly to room temperature and heating to a temperature near to but below the Ac point for sufficient time to graphitize the steel leaving 0.2-0.8 per cent of combined carbon. The steel so treated may be nitrided by heating in contact with a nitrogen-liberating agent for sufficient time to produce a nitride case of the desired depth. Specifications 338,655, 344,500 and 443,446 are referred to.
GB11437/45A 1944-05-04 1945-05-04 Graphitic alloy steels and nitrided products made therefrom Expired GB648242A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US648242XA 1944-05-04 1944-05-04

Publications (1)

Publication Number Publication Date
GB648242A true GB648242A (en) 1951-01-03

Family

ID=22058463

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11437/45A Expired GB648242A (en) 1944-05-04 1945-05-04 Graphitic alloy steels and nitrided products made therefrom

Country Status (1)

Country Link
GB (1) GB648242A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001735A1 (en) * 1985-09-19 1987-03-26 Sherby Oleg D Ultrahigh carbon steels containing aluminum, and processing thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001735A1 (en) * 1985-09-19 1987-03-26 Sherby Oleg D Ultrahigh carbon steels containing aluminum, and processing thereof

Similar Documents

Publication Publication Date Title
GB648242A (en) Graphitic alloy steels and nitrided products made therefrom
GB669396A (en) Hot working tools and alloys therefor
GB763398A (en) Improvements in or relating to steel
GB522252A (en) Improvements relating to the manufacture of austenitic ferrous alloy articles
GB746472A (en) Improvements in or relating to alloys
GB630138A (en) Improvements relating to cast iron shot
GB636919A (en) Improvements relating to the manufacture of articles and structural elements used at low temperatures and to steels for use therein
GB394378A (en) Improvements relating to alloys containing nickel and to methods of producing them
GB378478A (en) Improvements in or relating to alloy steels
GB606663A (en) Improvements in or relating to chromium-carbon steels for bearing races and to heat treatment processes therefor
GB630797A (en) Ferrous alloy having a high strength at high temperatures
GB666265A (en) Improvements in or relating to alloy steel
GB378508A (en) Improvements relating to cast iron
GB960174A (en) Improvements in the production of hard steel particles
GB1396003A (en) Steels
GB688588A (en) Improvements in the manufacture of cast iron
GB584669A (en) Improvements in and relating to cold rolled alloy iron or alloy steel articles
ES275466A1 (en) Improvements in or relating to alloy steels
GB890560A (en) Improvements in or relating to the production of cast iron
GB406131A (en) Improvements in or relating to ferrous alloys
GB625964A (en) Improvements in or relating to alloy steels
GB761151A (en) Improved metallurgical process and steel products producted therefrom
GB628169A (en) Method of introducing bismuth into steel or iron baths or into a steel alloy
GB654354A (en) Improvements in or relating to heat-resisting alloys containing cobalt
GB679389A (en) Improvements in alloy steels