JPS5443810A - Treating method by induction heating - Google Patents

Treating method by induction heating

Info

Publication number
JPS5443810A
JPS5443810A JP10982877A JP10982877A JPS5443810A JP S5443810 A JPS5443810 A JP S5443810A JP 10982877 A JP10982877 A JP 10982877A JP 10982877 A JP10982877 A JP 10982877A JP S5443810 A JPS5443810 A JP S5443810A
Authority
JP
Japan
Prior art keywords
pipe
weld zone
heating elements
heating
magnetic permeability
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
JP10982877A
Other languages
Japanese (ja)
Inventor
Kunio Enomoto
Tasuku Shimizu
Hiromitsu Koike
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10982877A priority Critical patent/JPS5443810A/en
Publication of JPS5443810A publication Critical patent/JPS5443810A/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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)
  • General Induction Heating (AREA)

Abstract

PURPOSE:To apply the solution heat treatment, at the same time, to reduce the tensile residual stress and, in this way, to obtain the welded piping, etc. having excellent corrosion resistance and fatigue resistance, by performing the induction heating through ferritic steel, etc. at the quick heating of the surface of the material to be heated, such as austenitic steel, etc. CONSTITUTION:To the surface of the weld zone 8 of the stainless steel pipe 6 to be welded having large specific resistance/magnetic permeability, the heating elements 1 of ferritic steel, etc. having small specific resistance/magnetic permeability, are sticked losely or jointed. When the primary current of AC is passed through the inductors 2 arranged apart from the heating elements 1, the heating elements 1 and the pipe 6 generate heat, but the greater part of induced current is induced to the heating elements 1 having small specific resistance/magnetic permeability, so that the same temperature gradient as the heating of the most outer surface is obtained to the pipe 6. By quenching the pipe subsequently, the most external layer becomes to be heated rapidly and to the metallurgical properties at the weld zone and its neighborhood on the ineer surface of the pipe at the weld zone 8, the tensile residual stress at the weld zone 8 is reduced and can be converted to compression. Accordingly, the butt welded piping at which the stress corrosion cracking and fatigue crack have been prevented, is obtained.
JP10982877A 1977-09-14 1977-09-14 Treating method by induction heating Pending JPS5443810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10982877A JPS5443810A (en) 1977-09-14 1977-09-14 Treating method by induction heating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10982877A JPS5443810A (en) 1977-09-14 1977-09-14 Treating method by induction heating

Publications (1)

Publication Number Publication Date
JPS5443810A true JPS5443810A (en) 1979-04-06

Family

ID=14520230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10982877A Pending JPS5443810A (en) 1977-09-14 1977-09-14 Treating method by induction heating

Country Status (1)

Country Link
JP (1) JPS5443810A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5926111U (en) * 1982-08-12 1984-02-18 太田　金次郎 Assembly structure of panel members
JP2005100935A (en) * 2003-08-25 2005-04-14 Tokyo Denki Univ Pipe induction heating device
WO2009078859A1 (en) * 2007-12-17 2009-06-25 Micro Motion, Inc. A method for reducing stress in a conduit brace assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5926111U (en) * 1982-08-12 1984-02-18 太田　金次郎 Assembly structure of panel members
JP2005100935A (en) * 2003-08-25 2005-04-14 Tokyo Denki Univ Pipe induction heating device
WO2009078859A1 (en) * 2007-12-17 2009-06-25 Micro Motion, Inc. A method for reducing stress in a conduit brace assembly

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