JPS5629627A - Manufacture of high strength steel pipe having good weldability for use at ordinary and medium temperature zone - Google Patents

Manufacture of high strength steel pipe having good weldability for use at ordinary and medium temperature zone

Info

Publication number
JPS5629627A
JPS5629627A JP10575979A JP10575979A JPS5629627A JP S5629627 A JPS5629627 A JP S5629627A JP 10575979 A JP10575979 A JP 10575979A JP 10575979 A JP10575979 A JP 10575979A JP S5629627 A JPS5629627 A JP S5629627A
Authority
JP
Japan
Prior art keywords
steel pipe
high strength
ordinary
manufacture
point
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
JP10575979A
Other languages
Japanese (ja)
Other versions
JPS6027731B2 (en
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 JP10575979A priority Critical patent/JPS6027731B2/en
Priority to CA358,149A priority patent/CA1131105A/en
Publication of JPS5629627A publication Critical patent/JPS5629627A/en
Publication of JPS6027731B2 publication Critical patent/JPS6027731B2/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)
  • Arc Welding In General (AREA)

Abstract

PURPOSE:To manufacture the steel pipe having high strength at ordinary and medium temperatues and good weldability by a method in which the steel pipe containing given proportions of C, Si, Mn, Mo, V, and Al is heated at a temperature higher than the point Ac3, hardened, and then tempered at a temperature lower than the point Ac1. CONSTITUTION:The steel pipe, consisting of 0.03-0.15wt% C, 0.01-0.80wt% Si, 0.50-2.00wt% Mn, 0.01-0.30wt% Mo, 0.005-0.10wt% V, 0.001-0.10wt% Al, and the balance Fe, is heat-treated in the following; that is, the steel pipe is heated at a temperature higher than the point Ac3, hardened to form an uniform austenite structure, and then tempered at a temperature higher than 600 deg.C but below the point Ac1. Thus, the steel pipe, although its C content is reduced, can keep a sufficiently high strength in a temperature range from ordinary temperature to 450 deg.C and also its coupling portion can keep a sufficiently high strength in the said temperature range even when undergone reheating at the welding time.
JP10575979A 1979-08-20 1979-08-20 Method for manufacturing steel pipes for steam transport that exhibit high strength in the medium temperature range of 200 to 450°C Expired JPS6027731B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP10575979A JPS6027731B2 (en) 1979-08-20 1979-08-20 Method for manufacturing steel pipes for steam transport that exhibit high strength in the medium temperature range of 200 to 450°C
CA358,149A CA1131105A (en) 1979-08-20 1980-08-13 Method of producing high-strength steel pipes having a good weldability and adapted to be used in a steam distribution pipeline in the oil sands development

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10575979A JPS6027731B2 (en) 1979-08-20 1979-08-20 Method for manufacturing steel pipes for steam transport that exhibit high strength in the medium temperature range of 200 to 450°C

Publications (2)

Publication Number Publication Date
JPS5629627A true JPS5629627A (en) 1981-03-25
JPS6027731B2 JPS6027731B2 (en) 1985-07-01

Family

ID=14416141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10575979A Expired JPS6027731B2 (en) 1979-08-20 1979-08-20 Method for manufacturing steel pipes for steam transport that exhibit high strength in the medium temperature range of 200 to 450°C

Country Status (2)

Country Link
JP (1) JPS6027731B2 (en)
CA (1) CA1131105A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6210212A (en) * 1985-07-08 1987-01-19 Nippon Kokan Kk <Nkk> Production of bend pipe
JPH05263193A (en) * 1992-03-18 1993-10-12 Nippon Steel Corp High strength electrically welded steel tube for boiler excellent in softening resistance at the time of stress relieving annealing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4748283B2 (en) * 2009-08-21 2011-08-17 住友金属工業株式会社 Manufacturing method of thick-walled seamless steel pipe
CN106048442B (en) * 2016-05-31 2018-05-01 攀钢集团攀枝花钢铁研究院有限公司 Pipe line steel containing vanadium and its production method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6210212A (en) * 1985-07-08 1987-01-19 Nippon Kokan Kk <Nkk> Production of bend pipe
JPH0138851B2 (en) * 1985-07-08 1989-08-16 Nippon Kokan Kk
JPH05263193A (en) * 1992-03-18 1993-10-12 Nippon Steel Corp High strength electrically welded steel tube for boiler excellent in softening resistance at the time of stress relieving annealing

Also Published As

Publication number Publication date
CA1131105A (en) 1982-09-07
JPS6027731B2 (en) 1985-07-01

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