JPS5763633A - In-line hardening method for steel pipe - Google Patents

In-line hardening method for steel pipe

Info

Publication number
JPS5763633A
JPS5763633A JP13576080A JP13576080A JPS5763633A JP S5763633 A JPS5763633 A JP S5763633A JP 13576080 A JP13576080 A JP 13576080A JP 13576080 A JP13576080 A JP 13576080A JP S5763633 A JPS5763633 A JP S5763633A
Authority
JP
Japan
Prior art keywords
temp
hardening
pipes
pipe
temps
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
JP13576080A
Other languages
Japanese (ja)
Other versions
JPS613373B2 (en
Inventor
Haruo Kamimura
Mitsuaki Hori
Megumi Tanaka
Toshio 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 JP13576080A priority Critical patent/JPS5763633A/en
Publication of JPS5763633A publication Critical patent/JPS5763633A/en
Publication of JPS613373B2 publication Critical patent/JPS613373B2/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)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE:To harden steel pipes inline and save energy by correcting the heating en route of the process of a steel pipe rolling line or right after the final process through detection of the temps. of the pipes and maintaining the pipes at prescribed hardening temps. CONSTITUTION:A computer CP controls heating temps. or conveyor speeds so that the temp. differences in the longitudinal direction of steel pipes to be introduced into a hardening vessel 5 are eliminated or minimized and that the pipe just prior to hardening minitained at prescribed temp. For example, a temp. detecting means 61 detects the temp. of the pipe just prior to entering the heating means 3 of a pipe line 1, and the computer CP recognizes the temp. distribution pattern per piece of the pipes or in their longitudinal direction first. From these, it forecasts the same pattern just prior to the hardening of the case when there is no means 3 and determines a target hardening temp. pattern. Following to this, the computer CP controls the temp. at each point of the means 3 and corrects the applied electric power at each point of the means 3 while monitoring the temps. at each point of the pipe during passing the means 3 detected momentarily with detecting means 62-6n and just prior to the hardening.
JP13576080A 1980-10-01 1980-10-01 In-line hardening method for steel pipe Granted JPS5763633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13576080A JPS5763633A (en) 1980-10-01 1980-10-01 In-line hardening method for steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13576080A JPS5763633A (en) 1980-10-01 1980-10-01 In-line hardening method for steel pipe

Publications (2)

Publication Number Publication Date
JPS5763633A true JPS5763633A (en) 1982-04-17
JPS613373B2 JPS613373B2 (en) 1986-01-31

Family

ID=15159214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13576080A Granted JPS5763633A (en) 1980-10-01 1980-10-01 In-line hardening method for steel pipe

Country Status (1)

Country Link
JP (1) JPS5763633A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996012574A1 (en) * 1994-10-20 1996-05-02 Sumitomo Metal Industries, Ltd. Method of manufacturing seamless steel pipes and manufacturing equipment therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996012574A1 (en) * 1994-10-20 1996-05-02 Sumitomo Metal Industries, Ltd. Method of manufacturing seamless steel pipes and manufacturing equipment therefor
US5873960A (en) * 1994-10-20 1999-02-23 Sumitomo Metal Industries, Ltd. Method and facility for manufacturing seamless steel pipe

Also Published As

Publication number Publication date
JPS613373B2 (en) 1986-01-31

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