GB796890A - Controlled atmospheres for the heat treatment of steels - Google Patents

Controlled atmospheres for the heat treatment of steels

Info

Publication number
GB796890A
GB796890A GB32872/55A GB3287255A GB796890A GB 796890 A GB796890 A GB 796890A GB 32872/55 A GB32872/55 A GB 32872/55A GB 3287255 A GB3287255 A GB 3287255A GB 796890 A GB796890 A GB 796890A
Authority
GB
United Kingdom
Prior art keywords
steels
heat treatment
temperature
controlled atmospheres
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
GB32872/55A
Inventor
Donald Whitwham
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.)
BOC Group Ltd
Original Assignee
British Oxigen 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 British Oxigen Ltd filed Critical British Oxigen Ltd
Priority to GB32872/55A priority Critical patent/GB796890A/en
Publication of GB796890A publication Critical patent/GB796890A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

A controlled atmosphere for the bright annealing of steel is produced by passing a gaseous nitrogen fraction containing 0.04-2 per cent O2, separated from air by low temperature liquefaction and rectification, over-heated charcoal at a temperature not substantially below 650 DEG C., and removing any CO2 and H2O formed, e.g. by treating with caustic potash and phosphorus pentoxide. A temperature of 800 DEG C. and above is preferably used when the resulting gas is N2 and CO only and may be used direct for heat treating steel.
GB32872/55A 1955-11-16 1955-11-16 Controlled atmospheres for the heat treatment of steels Expired GB796890A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB32872/55A GB796890A (en) 1955-11-16 1955-11-16 Controlled atmospheres for the heat treatment of steels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32872/55A GB796890A (en) 1955-11-16 1955-11-16 Controlled atmospheres for the heat treatment of steels

Publications (1)

Publication Number Publication Date
GB796890A true GB796890A (en) 1958-06-18

Family

ID=10345279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32872/55A Expired GB796890A (en) 1955-11-16 1955-11-16 Controlled atmospheres for the heat treatment of steels

Country Status (1)

Country Link
GB (1) GB796890A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0400924A2 (en) * 1989-05-29 1990-12-05 Alcan International Limited Process and apparatus for producing a gas which is substantially free of uncombined oxygen from air

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0400924A2 (en) * 1989-05-29 1990-12-05 Alcan International Limited Process and apparatus for producing a gas which is substantially free of uncombined oxygen from air
EP0400924A3 (en) * 1989-05-29 1992-04-08 Alcan International Limited Process and apparatus for producing a gas which is substantially free of uncombined oxygen from air
AU628981B2 (en) * 1989-05-29 1992-09-24 Alcan International Limited Process and apparatus for producing a gas which is substantially free of uncombined oxygen from air

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