JPS52131909A - Production of spital steel tube - Google Patents

Production of spital steel tube

Info

Publication number
JPS52131909A
JPS52131909A JP4787676A JP4787676A JPS52131909A JP S52131909 A JPS52131909 A JP S52131909A JP 4787676 A JP4787676 A JP 4787676A JP 4787676 A JP4787676 A JP 4787676A JP S52131909 A JPS52131909 A JP S52131909A
Authority
JP
Japan
Prior art keywords
spital
production
steel tube
tube
heating
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
JP4787676A
Other languages
Japanese (ja)
Inventor
Toshiro Ishihara
Tadaaki Taira
Junichiro Takehara
Kenji Takeshige
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 Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP4787676A priority Critical patent/JPS52131909A/en
Publication of JPS52131909A publication Critical patent/JPS52131909A/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
    • C21D1/26—Methods of annealing
    • C21D1/30—Stress-relieving

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Child & Adolescent Psychology (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE:To eliminate internal stress and Bauschinger effect of a spiral tube by heating the inner surface of the tube so as to prevent degradation of dimensional accuracy of the tube due to an increase in diameter at hydraulic tests.
JP4787676A 1976-04-28 1976-04-28 Production of spital steel tube Pending JPS52131909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4787676A JPS52131909A (en) 1976-04-28 1976-04-28 Production of spital steel tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4787676A JPS52131909A (en) 1976-04-28 1976-04-28 Production of spital steel tube

Publications (1)

Publication Number Publication Date
JPS52131909A true JPS52131909A (en) 1977-11-05

Family

ID=12787573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4787676A Pending JPS52131909A (en) 1976-04-28 1976-04-28 Production of spital steel tube

Country Status (1)

Country Link
JP (1) JPS52131909A (en)

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