GB808556A - A process for the heat treatment of an unalloyed or low-alloy structural steel containing from 0.03% to 0.12% of aluminium nitride - Google Patents

A process for the heat treatment of an unalloyed or low-alloy structural steel containing from 0.03% to 0.12% of aluminium nitride

Info

Publication number
GB808556A
GB808556A GB14265/55A GB1426555A GB808556A GB 808556 A GB808556 A GB 808556A GB 14265/55 A GB14265/55 A GB 14265/55A GB 1426555 A GB1426555 A GB 1426555A GB 808556 A GB808556 A GB 808556A
Authority
GB
United Kingdom
Prior art keywords
steel
heat treatment
aluminium nitride
unalloyed
aluminium
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
GB14265/55A
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Publication of GB808556A publication Critical patent/GB808556A/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
    • C21D6/02—Hardening by precipitation

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)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

A process for heat treating unalloyed or low alloy steel containing 0.03 to 0.12 per cent aluminium nitride made in ingots of 1000 kgs or greater comprises maintaining the aluminium and nitrogen in solution by accelerated cooling of the steel from the solidifying to 1000 DEG C., the aluminium nitride being formed only below this temperature by a precipitation heat treatment, after which the steel is normalized one or more times. The steel may be given a solution heat treatment at at temperature depending on the nitrogen content before the accelerated cooling which is at a rate exceeding 90 DEG C. per minute. The precipitation hardening may be carried out between A3 and 950 DEG C., the temperature depending on the aluminium/nitrogen ratio of the steel. The normalizing treatment may be replaced by a treatment comprising varying the temperature several times in the A1-A3 range.
GB14265/55A 1954-05-17 1955-05-17 A process for the heat treatment of an unalloyed or low-alloy structural steel containing from 0.03% to 0.12% of aluminium nitride Expired GB808556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE808556X 1954-05-17

Publications (1)

Publication Number Publication Date
GB808556A true GB808556A (en) 1959-02-04

Family

ID=6723106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14265/55A Expired GB808556A (en) 1954-05-17 1955-05-17 A process for the heat treatment of an unalloyed or low-alloy structural steel containing from 0.03% to 0.12% of aluminium nitride

Country Status (1)

Country Link
GB (1) GB808556A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155495A (en) * 1961-03-11 1964-11-03 Ishikawajima Harima Heavy Ind Nitride containing ductile steel
US3155549A (en) * 1961-03-11 1964-11-03 Ishikawajima Harima Heavy Ind Steel for high temperature cementation
US3163565A (en) * 1961-06-22 1964-12-29 Yawata Iron & Steel Co Process for producing a tough steel for low temperatures
US3178279A (en) * 1961-05-16 1965-04-13 Ishikawajima Harima Heavy Ind Nitride bearing low-manganese ductile steel
US3180726A (en) * 1960-03-31 1965-04-27 Ishikawajima Harima Heavy Ind Method for producing nitride-bearing low-carbon ductile steel
US3320099A (en) * 1964-08-12 1967-05-16 United States Steel Corp Method of processing steel
US3328211A (en) * 1963-12-05 1967-06-27 Ishikawajima Harima Heavy Ind Method of manufacturing weldable, tough and high strength steel for structure members usable in the ashot-state and steel so made
US3463677A (en) * 1968-08-14 1969-08-26 Ishikawajima Harima Heavy Ind Weldable high strength steel

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180726A (en) * 1960-03-31 1965-04-27 Ishikawajima Harima Heavy Ind Method for producing nitride-bearing low-carbon ductile steel
US3155495A (en) * 1961-03-11 1964-11-03 Ishikawajima Harima Heavy Ind Nitride containing ductile steel
US3155549A (en) * 1961-03-11 1964-11-03 Ishikawajima Harima Heavy Ind Steel for high temperature cementation
US3178279A (en) * 1961-05-16 1965-04-13 Ishikawajima Harima Heavy Ind Nitride bearing low-manganese ductile steel
US3163565A (en) * 1961-06-22 1964-12-29 Yawata Iron & Steel Co Process for producing a tough steel for low temperatures
US3328211A (en) * 1963-12-05 1967-06-27 Ishikawajima Harima Heavy Ind Method of manufacturing weldable, tough and high strength steel for structure members usable in the ashot-state and steel so made
US3320099A (en) * 1964-08-12 1967-05-16 United States Steel Corp Method of processing steel
US3463677A (en) * 1968-08-14 1969-08-26 Ishikawajima Harima Heavy Ind Weldable high strength steel

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