JPS5573828A - Reducing method of residual stress at circumferential weld zone of steel pipe - Google Patents

Reducing method of residual stress at circumferential weld zone of steel pipe

Info

Publication number
JPS5573828A
JPS5573828A JP14737678A JP14737678A JPS5573828A JP S5573828 A JPS5573828 A JP S5573828A JP 14737678 A JP14737678 A JP 14737678A JP 14737678 A JP14737678 A JP 14737678A JP S5573828 A JPS5573828 A JP S5573828A
Authority
JP
Japan
Prior art keywords
residual stress
weld zone
circumferential weld
pipes
butt
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.)
Granted
Application number
JP14737678A
Other languages
Japanese (ja)
Other versions
JPS5830375B2 (en
Inventor
Kazushige Arimochi
Yoshiaki Kawaguchi
Juichi Kawashima
Yoshiyasu Morita
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP14737678A priority Critical patent/JPS5830375B2/en
Publication of JPS5573828A publication Critical patent/JPS5573828A/en
Publication of JPS5830375B2 publication Critical patent/JPS5830375B2/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
    • 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

Abstract

PURPOSE:To reduce the residual stress at the circumferential weld zone of steel pipes as far as possible by making use of the advantages of a local stress relief annealing method which is used for residual stress relieving of the circumferential weld zone after butt welding and preventing the production of new residual stress after stress relief annealing being a disadvantage. CONSTITUTION:The butt circumferential weld zone of steel pipes and its neighborhood are so heated as to become maximum temperatures 580-700 deg.C after finishing of welding so that the maximum heating temperature area thereof is held in a range of more than 5 times the wall thickness of the pipes to the right and left with the weld line as a center. Or heat treatment is so accomplished that the distances between the positions reaching 450 deg.C on the outer side of said maximum heating temperature area and the weld line are held at more than 10 times the wall thickness of the pipe respectively to the right and left of the weld one and even temperature distributions are given in the thickness direction of the pipes. In this way, the residual stress of the weld zone of the butt-welded steel pipe may be reduced.
JP14737678A 1978-11-28 1978-11-28 Method for reducing residual stress in circumferential welds of steel pipes Expired JPS5830375B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14737678A JPS5830375B2 (en) 1978-11-28 1978-11-28 Method for reducing residual stress in circumferential welds of steel pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14737678A JPS5830375B2 (en) 1978-11-28 1978-11-28 Method for reducing residual stress in circumferential welds of steel pipes

Publications (2)

Publication Number Publication Date
JPS5573828A true JPS5573828A (en) 1980-06-03
JPS5830375B2 JPS5830375B2 (en) 1983-06-29

Family

ID=15428827

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14737678A Expired JPS5830375B2 (en) 1978-11-28 1978-11-28 Method for reducing residual stress in circumferential welds of steel pipes

Country Status (1)

Country Link
JP (1) JPS5830375B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103627861A (en) * 2013-11-26 2014-03-12 中联重科股份有限公司渭南分公司 Excavator boom shape-righting stress-eliminating system and method for shape-righting stress-eliminating
WO2015029095A1 (en) * 2013-08-26 2015-03-05 株式会社日立製作所 Method and apparatus for heat-treating welded structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015029095A1 (en) * 2013-08-26 2015-03-05 株式会社日立製作所 Method and apparatus for heat-treating welded structure
CN103627861A (en) * 2013-11-26 2014-03-12 中联重科股份有限公司渭南分公司 Excavator boom shape-righting stress-eliminating system and method for shape-righting stress-eliminating
CN103627861B (en) * 2013-11-26 2015-08-26 中联重科股份有限公司渭南分公司 The method of a kind of excavator swing arm orthopedic stress-removal system and orthopedic stress-removal

Also Published As

Publication number Publication date
JPS5830375B2 (en) 1983-06-29

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