JPS5773133A - Production of electric welded steel pipe - Google Patents

Production of electric welded steel pipe

Info

Publication number
JPS5773133A
JPS5773133A JP15054180A JP15054180A JPS5773133A JP S5773133 A JPS5773133 A JP S5773133A JP 15054180 A JP15054180 A JP 15054180A JP 15054180 A JP15054180 A JP 15054180A JP S5773133 A JPS5773133 A JP S5773133A
Authority
JP
Japan
Prior art keywords
welded part
steel pipe
heat treatment
residual stress
welded
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.)
Pending
Application number
JP15054180A
Other languages
Japanese (ja)
Inventor
Eiichi Yokoyama
Michio Saito
Takaaki Toyooka
Akio Ejima
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP15054180A priority Critical patent/JPS5773133A/en
Publication of JPS5773133A publication Critical patent/JPS5773133A/en
Pending 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints

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

PURPOSE:To obtain a high strength electric welded steel pipe which is less threattened with bending owing to fluctuations in climatic conditions and secular change and is suited for oil wells, etc. by subjecting the electric welded part of a steel pipe formed from a steel plate to local heat treatment in a specific temp. range. CONSTITUTION:A steel plate is formed to a tubular shape and is electrically welded. The electric welded part is subjected to local heat treatment at above the A3 transformation point and >=1,000 deg.C. The residual stress of the welded part is relieaved by this heat treatment. Particularly by the local heating of 900 deg.C. The difference between the residual stress of the welded part and the residual stress of the base metal part is virtually eliminated, and the mechanical strength distribution is made uniform in the circumferential direction of the pipe. Hence, the toughness of the welded part is improved and the preventive effect of the selective corrosion of the welded part is obtained.
JP15054180A 1980-10-27 1980-10-27 Production of electric welded steel pipe Pending JPS5773133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15054180A JPS5773133A (en) 1980-10-27 1980-10-27 Production of electric welded steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15054180A JPS5773133A (en) 1980-10-27 1980-10-27 Production of electric welded steel pipe

Publications (1)

Publication Number Publication Date
JPS5773133A true JPS5773133A (en) 1982-05-07

Family

ID=15499115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15054180A Pending JPS5773133A (en) 1980-10-27 1980-10-27 Production of electric welded steel pipe

Country Status (1)

Country Link
JP (1) JPS5773133A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021046673A (en) * 2019-09-17 2021-03-25 Ｊｆｅスチール株式会社 Steel pipe pile joint, steel pipe pile, and construction method of steel pipe pile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021046673A (en) * 2019-09-17 2021-03-25 Ｊｆｅスチール株式会社 Steel pipe pile joint, steel pipe pile, and construction method of steel pipe pile

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