JPS5798628A - Heating method for steel pipe - Google Patents

Heating method for steel pipe

Info

Publication number
JPS5798628A
JPS5798628A JP17483580A JP17483580A JPS5798628A JP S5798628 A JPS5798628 A JP S5798628A JP 17483580 A JP17483580 A JP 17483580A JP 17483580 A JP17483580 A JP 17483580A JP S5798628 A JPS5798628 A JP S5798628A
Authority
JP
Japan
Prior art keywords
steel pipe
heating
oxidized film
cooling
atmosphere
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
JP17483580A
Other languages
Japanese (ja)
Inventor
Toshihisa Tagami
Shinichi Nerihashi
Tadashi Nishihara
Haruo Niwa
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 Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP17483580A priority Critical patent/JPS5798628A/en
Publication of JPS5798628A publication Critical patent/JPS5798628A/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
    • 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)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE:To prevent defectives of lengthwise curvature and circumferential roundness generated in cooling a steel pipe, by sticking a hard oxidized film uniformly by controlling the oxygen concentration of the atmosphere of a furnace during a heating and soaking treatment of the steel pipe. CONSTITUTION:When a steel tube to be treated is heated to an austenite region, the oxygen concentration of the atmosphere in a furnace is controlled to 0.2- 2.0%. In this heating and soaking treatment, a hard, hardly-peeled oxidized film is formed on the surface of the steel pipe to the overall length and overall circumference. Consequently, the oxidized film never peels off in a process of forced cooling after the heating, eliminating irregularity of a cooling speed. Therefore, defectives of curvature and roundness generated in the forced cooling are minimized.
JP17483580A 1980-12-10 1980-12-10 Heating method for steel pipe Pending JPS5798628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17483580A JPS5798628A (en) 1980-12-10 1980-12-10 Heating method for steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17483580A JPS5798628A (en) 1980-12-10 1980-12-10 Heating method for steel pipe

Publications (1)

Publication Number Publication Date
JPS5798628A true JPS5798628A (en) 1982-06-18

Family

ID=15985482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17483580A Pending JPS5798628A (en) 1980-12-10 1980-12-10 Heating method for steel pipe

Country Status (1)

Country Link
JP (1) JPS5798628A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6024316A (en) * 1983-07-20 1985-02-07 Nippon Steel Corp Method for quenching steel material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6024316A (en) * 1983-07-20 1985-02-07 Nippon Steel Corp Method for quenching steel material

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