JPS5693821A - Production of steel pipe having excellent crushing strength - Google Patents

Production of steel pipe having excellent crushing strength

Info

Publication number
JPS5693821A
JPS5693821A JP17026679A JP17026679A JPS5693821A JP S5693821 A JPS5693821 A JP S5693821A JP 17026679 A JP17026679 A JP 17026679A JP 17026679 A JP17026679 A JP 17026679A JP S5693821 A JPS5693821 A JP S5693821A
Authority
JP
Japan
Prior art keywords
steel pipe
crushing strength
production
conditions
annealing
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
JP17026679A
Other languages
Japanese (ja)
Inventor
Kazushi Maruyama
Shigeharu Yoshida
Katsuji 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.)
Nippon Steel Corp
Original Assignee
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP17026679A priority Critical patent/JPS5693821A/en
Publication of JPS5693821A publication Critical patent/JPS5693821A/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 efficiently enhance the crushing strength of a steel pipe by specifying the conditions for making fine austenite crystal grains and for removing the residual stress generated at cold correction process. CONSTITUTION:A rolled steel pipe is heat-treated with an induction heating process to adjust its austenite grains to more than ASTM No.8. After cold correction, the residual stress is removed by annealing in inductive heating process at 500 deg.C or more, maintained for 10sec to 5min, under the conditions of 15X10<3=M<=17X 10<3> and M=T(16.5+logt) where T is heating temperature ( deg.K), t is maintained time (s), and M is parameter for stress removing annealing. By this process, the crushing strength can be enhanced to more than API Bul5C2 without deteriorating the resistance to sulfide corrosion cracking.
JP17026679A 1979-12-28 1979-12-28 Production of steel pipe having excellent crushing strength Pending JPS5693821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17026679A JPS5693821A (en) 1979-12-28 1979-12-28 Production of steel pipe having excellent crushing strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17026679A JPS5693821A (en) 1979-12-28 1979-12-28 Production of steel pipe having excellent crushing strength

Publications (1)

Publication Number Publication Date
JPS5693821A true JPS5693821A (en) 1981-07-29

Family

ID=15901743

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17026679A Pending JPS5693821A (en) 1979-12-28 1979-12-28 Production of steel pipe having excellent crushing strength

Country Status (1)

Country Link
JP (1) JPS5693821A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103459618A (en) * 2011-02-18 2013-12-18 悬挂***股份有限公司 Method for manufacturing high-strength steel sheet parts subject in use to fatigue stresses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103459618A (en) * 2011-02-18 2013-12-18 悬挂***股份有限公司 Method for manufacturing high-strength steel sheet parts subject in use to fatigue stresses

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