GB956213A - Improvements in or relating to methods of decreasing the ageing of steel - Google Patents

Improvements in or relating to methods of decreasing the ageing of steel

Info

Publication number
GB956213A
GB956213A GB38947/62D GB3894762D GB956213A GB 956213 A GB956213 A GB 956213A GB 38947/62 D GB38947/62 D GB 38947/62D GB 3894762 D GB3894762 D GB 3894762D GB 956213 A GB956213 A GB 956213A
Authority
GB
United Kingdom
Prior art keywords
steel
ageing
hydrogen
decreasing
relating
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
GB38947/62D
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.)
Fried Krupp AG Hoesch Krupp
Original Assignee
Hoesch AG
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 Hoesch AG filed Critical Hoesch AG
Publication of GB956213A publication Critical patent/GB956213A/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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/08—Extraction of nitrogen
    • 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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals

Landscapes

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

Abstract

Denitrification of steel to decrease the ageing tendency is achieved by annealing in an atmosphere of nitrogen, hydrogen and water vapour within a temperature range extending for 100 DEG C. below the minimum temperature at which decarburization occurs. A preferred temperature range is 500-600 DEG C. and the gas mixture desirably contains more than 40% of hydrogen. One composition described consists of 75-80% hydrogen, 0.5-5% water vapour, balance nitrogen.
GB38947/62D 1962-02-16 1962-10-15 Improvements in or relating to methods of decreasing the ageing of steel Expired GB956213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH44897A DE1175258B (en) 1962-02-16 1962-02-16 Process to reduce the aging sensitivity of steel strips and wires

Publications (1)

Publication Number Publication Date
GB956213A true GB956213A (en) 1964-04-22

Family

ID=7155653

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38947/62D Expired GB956213A (en) 1962-02-16 1962-10-15 Improvements in or relating to methods of decreasing the ageing of steel

Country Status (4)

Country Link
US (1) US3184344A (en)
BE (1) BE623982A (en)
DE (1) DE1175258B (en)
GB (1) GB956213A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3617230A (en) * 1969-04-09 1971-11-02 United States Steel Corp High-strength steel wire

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2271242A (en) * 1940-05-23 1942-01-27 Great Lakes Steel Corp Method of making nonaging steel
US2360868A (en) * 1943-01-02 1944-10-24 Carnegie Illinois Steel Corp Manufacture of nonaging steel
US3105780A (en) * 1960-09-19 1963-10-01 Gen Electric Method of decarburizing ferrous materials

Also Published As

Publication number Publication date
DE1175258B (en) 1964-08-06
BE623982A (en)
US3184344A (en) 1965-05-18

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