JPS56119738A - Heat treatment of fusion welded part of main pipe and branched pipe - Google Patents

Heat treatment of fusion welded part of main pipe and branched pipe

Info

Publication number
JPS56119738A
JPS56119738A JP2324980A JP2324980A JPS56119738A JP S56119738 A JPS56119738 A JP S56119738A JP 2324980 A JP2324980 A JP 2324980A JP 2324980 A JP2324980 A JP 2324980A JP S56119738 A JPS56119738 A JP S56119738A
Authority
JP
Japan
Prior art keywords
welded part
pipe
main pipe
frequency heating
branched pipe
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
JP2324980A
Other languages
Japanese (ja)
Other versions
JPS5837370B2 (en
Inventor
Atsushi Tanaka
Tadahiro Umemoto
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.)
IHI Corp
Original Assignee
IHI 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 IHI Corp filed Critical IHI Corp
Priority to JP2324980A priority Critical patent/JPS5837370B2/en
Publication of JPS56119738A publication Critical patent/JPS56119738A/en
Publication of JPS5837370B2 publication Critical patent/JPS5837370B2/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

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)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

PURPOSE:To effectively improve the residual stress of the fusion welded part of a main pipe and a branched pipe by increasing a magnetic field generated by a high- frequency heating coil for the main pipe at its weakened part with a high frequency heating coil for the the branched pipe to uniformly heat the welded part. CONSTITUTION:In a method of heat treating the fusion welded part of main pipe 1 and branched pipe 2 with high frequency heating coils while feeding a cooling medium to the inside of the welded part, a weakened part of a magnetic field generated by high frequency heating coil 3 for main pipe 1 is increased to a degree equal to that of other part with a magnetic field generated by high-frequency heating coil 3b for branched pipe 2. As a result, the welded part is uniformly heated to effectively improve the tensile residual stress of the inside of the welded part.
JP2324980A 1980-02-26 1980-02-26 Heat treatment method for welded parts between main pipe and branch pipe Expired JPS5837370B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2324980A JPS5837370B2 (en) 1980-02-26 1980-02-26 Heat treatment method for welded parts between main pipe and branch pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2324980A JPS5837370B2 (en) 1980-02-26 1980-02-26 Heat treatment method for welded parts between main pipe and branch pipe

Publications (2)

Publication Number Publication Date
JPS56119738A true JPS56119738A (en) 1981-09-19
JPS5837370B2 JPS5837370B2 (en) 1983-08-16

Family

ID=12105318

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2324980A Expired JPS5837370B2 (en) 1980-02-26 1980-02-26 Heat treatment method for welded parts between main pipe and branch pipe

Country Status (1)

Country Link
JP (1) JPS5837370B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6136473A (en) * 1984-07-26 1986-02-21 有限会社　マツヤ Hinge

Also Published As

Publication number Publication date
JPS5837370B2 (en) 1983-08-16

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