JPS5647520A - Heating process for steel pipe - Google Patents

Heating process for steel pipe

Info

Publication number
JPS5647520A
JPS5647520A JP12193579A JP12193579A JPS5647520A JP S5647520 A JPS5647520 A JP S5647520A JP 12193579 A JP12193579 A JP 12193579A JP 12193579 A JP12193579 A JP 12193579A JP S5647520 A JPS5647520 A JP S5647520A
Authority
JP
Japan
Prior art keywords
steel pipe
heated
waste gas
furnace
drawn
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
JP12193579A
Other languages
Japanese (ja)
Other versions
JPS5844727B2 (en
Inventor
Noriki Kubo
Tetsuo Sada
Haruo Kamimura
Masamutsu Numano
Isao Nakamura
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 JP12193579A priority Critical patent/JPS5844727B2/en
Publication of JPS5647520A publication Critical patent/JPS5647520A/en
Publication of JPS5844727B2 publication Critical patent/JPS5844727B2/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
    • C21D9/08—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 effect an efficient and uniform heating process by a method wherein a heated gas is blown into the inside of a horizontally moving steel pipe from its both ends alternately. CONSTITUTION:A steel pipe is efficiently preheated by a waste gas from a quenching furnace. After the steel pipe 6 is heated to about 1,000 deg.C in the quenching furnace 1, it is subject to a rapid-cool quenching treatment in water, and guided into a preheating device 5. Combustion waste gas from the furnace 1 is sent via an air preheater 3, a close/open valve 8, a suction blower 9, into the preheating device. There, the waste gas passes through piping 16 and drawn into the steel pipe 6 from jet nozzles 17. The drawing operation is conducted alternately by switching dampers 18, 19. In this manner, the inner surface is heated by heated gas that is drawn, and the external surface is heated by the atmosphere of combustion waste gas having a specific temperature in the device 5. The steel pipe 6 is given uniform heating and efficiently preheated to a specified temperature before entering into a tempering furnace 2.
JP12193579A 1979-09-25 1979-09-25 How to heat steel pipes Expired JPS5844727B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12193579A JPS5844727B2 (en) 1979-09-25 1979-09-25 How to heat steel pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12193579A JPS5844727B2 (en) 1979-09-25 1979-09-25 How to heat steel pipes

Publications (2)

Publication Number Publication Date
JPS5647520A true JPS5647520A (en) 1981-04-30
JPS5844727B2 JPS5844727B2 (en) 1983-10-05

Family

ID=14823564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12193579A Expired JPS5844727B2 (en) 1979-09-25 1979-09-25 How to heat steel pipes

Country Status (1)

Country Link
JP (1) JPS5844727B2 (en)

Also Published As

Publication number Publication date
JPS5844727B2 (en) 1983-10-05

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