JPS5485116A - Heat treating method for large-sized steel pipe - Google Patents

Heat treating method for large-sized steel pipe

Info

Publication number
JPS5485116A
JPS5485116A JP15298177A JP15298177A JPS5485116A JP S5485116 A JPS5485116 A JP S5485116A JP 15298177 A JP15298177 A JP 15298177A JP 15298177 A JP15298177 A JP 15298177A JP S5485116 A JPS5485116 A JP S5485116A
Authority
JP
Japan
Prior art keywords
shaping
pipe
steel pipe
shaped
sized steel
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
JP15298177A
Other languages
Japanese (ja)
Other versions
JPS6114896B2 (en
Inventor
Hajime Nakasugi
Tsutomu Kimura
Masanobu Yamaguchi
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
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP15298177A priority Critical patent/JPS5485116A/en
Publication of JPS5485116A publication Critical patent/JPS5485116A/en
Publication of JPS6114896B2 publication Critical patent/JPS6114896B2/ja
Granted 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes

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)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE:To prevent deterioration of the shaped form of a thin, large-sized steel pipe by shaping the pipe at 700-300 deg.C in the cooling process for tempering in heat treatment of the pipe. CONSTITUTION:Hardened steel pipe 1 is heated with induction heating coil 3 to the tempering temp. and passed through primary air-blast nozzle 4. Pipe 1 is cooled to 700-300 deg.C suitable for shaping in nozzle 4 and passed through shaping unit 5, where it is shaped round with horizontally shaping rolls 7 and vertically shaping rolls 8 of unit 5. The shaped pipe is then cooled with secondary air-blast cooling nozzle 6 and conveyed to the next process. When the shaping temp. exceeds 700 deg.C, little shaping force is required, yet the roundness is deteriorated by above 1%. Unless the pipe is shaped at below 700 deg.C, deformation may occur after the shaping. In case of shaping at below 300 deg.C, residual stress is generated. Thus, by shaping the pipe at 700-300 deg.C, a large-sized steel pipe of superior roundness is obtd.
JP15298177A 1977-12-21 1977-12-21 Heat treating method for large-sized steel pipe Granted JPS5485116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15298177A JPS5485116A (en) 1977-12-21 1977-12-21 Heat treating method for large-sized steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15298177A JPS5485116A (en) 1977-12-21 1977-12-21 Heat treating method for large-sized steel pipe

Publications (2)

Publication Number Publication Date
JPS5485116A true JPS5485116A (en) 1979-07-06
JPS6114896B2 JPS6114896B2 (en) 1986-04-21

Family

ID=15552344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15298177A Granted JPS5485116A (en) 1977-12-21 1977-12-21 Heat treating method for large-sized steel pipe

Country Status (1)

Country Link
JP (1) JPS5485116A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108517398A (en) * 2018-06-26 2018-09-11 安徽马钢设备检修有限公司 A kind of Large Diameter Pipeline thin-wall tube post weld heat treatment device and its application method
US10534140B2 (en) 2016-08-10 2020-01-14 International Business Machines Corporation Single-mode polymer waveguide connector assembly device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10534140B2 (en) 2016-08-10 2020-01-14 International Business Machines Corporation Single-mode polymer waveguide connector assembly device
CN108517398A (en) * 2018-06-26 2018-09-11 安徽马钢设备检修有限公司 A kind of Large Diameter Pipeline thin-wall tube post weld heat treatment device and its application method
CN108517398B (en) * 2018-06-26 2023-10-27 安徽马钢设备检修有限公司 Post-welding heat treatment device for large-pipe-diameter thin-wall pipe and use method thereof

Also Published As

Publication number Publication date
JPS6114896B2 (en) 1986-04-21

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