GB399049A - Improvements relating to processes for annealing steels and alloys - Google Patents

Improvements relating to processes for annealing steels and alloys

Info

Publication number
GB399049A
GB399049A GB35016/32A GB3501632A GB399049A GB 399049 A GB399049 A GB 399049A GB 35016/32 A GB35016/32 A GB 35016/32A GB 3501632 A GB3501632 A GB 3501632A GB 399049 A GB399049 A GB 399049A
Authority
GB
United Kingdom
Prior art keywords
alloys
nickel
steels
annealing
processes
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
GB35016/32A
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.)
Mond Nickel Co Ltd
Original Assignee
Mond Nickel Co 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 Mond Nickel Co Ltd filed Critical Mond Nickel Co Ltd
Publication of GB399049A publication Critical patent/GB399049A/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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni

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)

Abstract

Steels, alloy, steels, and alloys containing nickel are treated by imparting a bright surface to them, rendering the bright surface passive and then annealing at 1650-2000 DEG F. for several hours in a reducing atmosphere, e.g. dry hydrogen. The alloys may be washed before annealing. The surface of the steel is rendered passive by heating them in a nitric acid solution at 160-200 DEG F. for 15-60 minutes. The process may be applied to a stainless steel containing 18 per cent of chromium and 14 of nickel or to a nickel-chromium alloy containing 88 per cent of nickel.
GB35016/32A 1931-12-09 1932-12-09 Improvements relating to processes for annealing steels and alloys Expired GB399049A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US399049XA 1931-12-09 1931-12-09

Publications (1)

Publication Number Publication Date
GB399049A true GB399049A (en) 1933-09-28

Family

ID=21907967

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35016/32A Expired GB399049A (en) 1931-12-09 1932-12-09 Improvements relating to processes for annealing steels and alloys

Country Status (1)

Country Link
GB (1) GB399049A (en)

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