FR2049610A5 - Annealing of high tension welding steel - Google Patents

Annealing of high tension welding steel

Info

Publication number
FR2049610A5
FR2049610A5 FR6919803A FR6919803A FR2049610A5 FR 2049610 A5 FR2049610 A5 FR 2049610A5 FR 6919803 A FR6919803 A FR 6919803A FR 6919803 A FR6919803 A FR 6919803A FR 2049610 A5 FR2049610 A5 FR 2049610A5
Authority
FR
France
Prior art keywords
steel
annealing
thermal cycle
welding
high tension
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
FR6919803A
Other languages
French (fr)
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to FR6919803A priority Critical patent/FR2049610A5/en
Application granted granted Critical
Publication of FR2049610A5 publication Critical patent/FR2049610A5/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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening

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 Articles (AREA)

Abstract

Steel is annealed under cooling conditions virtually equal to those of a thermal cycle occurring with welding. Allowance is made for the effect of the thermal cycle on the steel surface exposed to the welding heat. The annealing is carried out so that after the steel is heated to a transformation point A3 it is cooled in 5-50 seconds to 500 degrees C and subsequently, in 20-4300 seconds, slowly and continuously from 500 to 200 degrees C, at a speed corresponding with the thermal cycle in welding, so that a transformation of the steel from the austenite structure is brought about.
FR6919803A 1969-06-13 1969-06-13 Annealing of high tension welding steel Expired FR2049610A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR6919803A FR2049610A5 (en) 1969-06-13 1969-06-13 Annealing of high tension welding steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6919803A FR2049610A5 (en) 1969-06-13 1969-06-13 Annealing of high tension welding steel

Publications (1)

Publication Number Publication Date
FR2049610A5 true FR2049610A5 (en) 1971-03-26

Family

ID=9035733

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6919803A Expired FR2049610A5 (en) 1969-06-13 1969-06-13 Annealing of high tension welding steel

Country Status (1)

Country Link
FR (1) FR2049610A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2358465A1 (en) * 1976-07-13 1978-02-10 Bochumer Eisen Heintzmann Bainitic steel support sections with predetermined strength - esp. for supporting subterranean galleries

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2358465A1 (en) * 1976-07-13 1978-02-10 Bochumer Eisen Heintzmann Bainitic steel support sections with predetermined strength - esp. for supporting subterranean galleries

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Legal Events

Date Code Title Description
ST Notification of lapse