JPS563626A - Manufacture of seamless steel pipe excellent in toughness - Google Patents

Manufacture of seamless steel pipe excellent in toughness

Info

Publication number
JPS563626A
JPS563626A JP7990079A JP7990079A JPS563626A JP S563626 A JPS563626 A JP S563626A JP 7990079 A JP7990079 A JP 7990079A JP 7990079 A JP7990079 A JP 7990079A JP S563626 A JPS563626 A JP S563626A
Authority
JP
Japan
Prior art keywords
temp
toughness
manufacture
steel pipe
cooled
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
JP7990079A
Other languages
Japanese (ja)
Inventor
Seiji Ishimoto
Eiichi Yokoyama
Akio Ejima
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 JP7990079A priority Critical patent/JPS563626A/en
Publication of JPS563626A publication Critical patent/JPS563626A/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

Abstract

PURPOSE:To manufacture economically a seamless pipe excellent in toughness as it is rolled, by subjecting the seamless pipe to specific heat treatment during hot rolling, then by subjecting it to the last rolling, and by cooling it compulsively in a specific temp. range. CONSTITUTION:In manufacture of a seamless steel pipe by hot rolling, a slab is heated to a temp. not lower than 1,200 deg.C, and is worked to an intermediate raw pipe, a sheel, by passing it through a piercer, an elongator, a plug mill and a reeler etc. The shell is cooled with water etc. compulsively to a temp. not higher than 500 deg.C, and is heated once again to a temp. range Ac3-1,000 deg.C so as to make the crystal grains fine. Subsequently, it is finally hot sized to finish to a desired sectional shape. It is either cooled with air, or cooled at a cooling rate not higher than 10 deg.C/sec in the temp. range 800-600 deg., hereby a semaless steel pipe having excellent toughness is manufactured without annealing, tempering and without addition of particular elements.
JP7990079A 1979-06-25 1979-06-25 Manufacture of seamless steel pipe excellent in toughness Pending JPS563626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7990079A JPS563626A (en) 1979-06-25 1979-06-25 Manufacture of seamless steel pipe excellent in toughness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7990079A JPS563626A (en) 1979-06-25 1979-06-25 Manufacture of seamless steel pipe excellent in toughness

Publications (1)

Publication Number Publication Date
JPS563626A true JPS563626A (en) 1981-01-14

Family

ID=13703147

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7990079A Pending JPS563626A (en) 1979-06-25 1979-06-25 Manufacture of seamless steel pipe excellent in toughness

Country Status (1)

Country Link
JP (1) JPS563626A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0110491A2 (en) * 1982-08-27 1984-06-13 Westinghouse Electric Corporation Size and weight graded multi-layered EAS diffusion electrodes
JPH0452226A (en) * 1990-06-19 1992-02-20 Sumitomo Metal Ind Ltd Production of high strength seamless steel tube
US5873960A (en) * 1994-10-20 1999-02-23 Sumitomo Metal Industries, Ltd. Method and facility for manufacturing seamless steel pipe
US5938865A (en) * 1995-05-15 1999-08-17 Sumitomo Metal Industries, Ltc. Process for producing high-strength seamless steel pipe having excellent sulfide stress cracking resistance
US6024808A (en) * 1996-04-19 2000-02-15 Sumitomo Metal Industries, Ltd. Seamless steel pipe manufacturing method and equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0110491A2 (en) * 1982-08-27 1984-06-13 Westinghouse Electric Corporation Size and weight graded multi-layered EAS diffusion electrodes
JPH0452226A (en) * 1990-06-19 1992-02-20 Sumitomo Metal Ind Ltd Production of high strength seamless steel tube
US5873960A (en) * 1994-10-20 1999-02-23 Sumitomo Metal Industries, Ltd. Method and facility for manufacturing seamless steel pipe
US5938865A (en) * 1995-05-15 1999-08-17 Sumitomo Metal Industries, Ltc. Process for producing high-strength seamless steel pipe having excellent sulfide stress cracking resistance
US6024808A (en) * 1996-04-19 2000-02-15 Sumitomo Metal Industries, Ltd. Seamless steel pipe manufacturing method and equipment

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