JPS5633424A - Steel pipe having excellent crushing strength - Google Patents

Steel pipe having excellent crushing strength

Info

Publication number
JPS5633424A
JPS5633424A JP10734779A JP10734779A JPS5633424A JP S5633424 A JPS5633424 A JP S5633424A JP 10734779 A JP10734779 A JP 10734779A JP 10734779 A JP10734779 A JP 10734779A JP S5633424 A JPS5633424 A JP S5633424A
Authority
JP
Japan
Prior art keywords
steel pipe
crushing strength
tempered
excellent crushing
residual stress
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
JP10734779A
Other languages
Japanese (ja)
Inventor
Yoichi Yazaki
Hirokichi Higashiyama
Fujimasa Kamiyama
Kazushi Maruyama
Kyohei Murata
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 JP10734779A priority Critical patent/JPS5633424A/en
Publication of JPS5633424A publication Critical patent/JPS5633424A/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 improve the crushing strength of steel pipe, by cooling rapidly the steel pipe having been tempered so as to produce tensile residual stress on the internal surface. CONSTITUTION:After a steel pipe 4 is tempered at 600 deg.C, it is conveyed by pinch rolls 3 in the direction of an arrow 7. The steel pipe 4 is quenched on the way with a cooling header 5 and a second cooling header 6. The quenching produces 20kg/mm.<2> tensile residual stress which is not higher than the yield stress. Hereby steel pipe having high crushing strength is manufactured without changing the chemical components of the steel.
JP10734779A 1979-08-23 1979-08-23 Steel pipe having excellent crushing strength Pending JPS5633424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10734779A JPS5633424A (en) 1979-08-23 1979-08-23 Steel pipe having excellent crushing strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10734779A JPS5633424A (en) 1979-08-23 1979-08-23 Steel pipe having excellent crushing strength

Publications (1)

Publication Number Publication Date
JPS5633424A true JPS5633424A (en) 1981-04-03

Family

ID=14456743

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10734779A Pending JPS5633424A (en) 1979-08-23 1979-08-23 Steel pipe having excellent crushing strength

Country Status (1)

Country Link
JP (1) JPS5633424A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515777A1 (en) * 1981-11-04 1983-05-06 Sumitomo Metal Ind METAL TUBULAR STRUCTURE WITH IMPROVED RESISTANCE TO CRUSHING, AND METHOD OF MANUFACTURING THE SAME
JPS58199814A (en) * 1982-05-15 1983-11-21 Nippon Steel Corp Production of steel pipe having excellent resistance to stress corrosion cracking
JPS59166624A (en) * 1983-03-10 1984-09-20 Showa Mfg Co Ltd High frequency induction refining of pipe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515777A1 (en) * 1981-11-04 1983-05-06 Sumitomo Metal Ind METAL TUBULAR STRUCTURE WITH IMPROVED RESISTANCE TO CRUSHING, AND METHOD OF MANUFACTURING THE SAME
JPS58199814A (en) * 1982-05-15 1983-11-21 Nippon Steel Corp Production of steel pipe having excellent resistance to stress corrosion cracking
JPS59166624A (en) * 1983-03-10 1984-09-20 Showa Mfg Co Ltd High frequency induction refining of pipe

Similar Documents

Publication Publication Date Title
SE7905256L (en) KIT FOR MANUFACTURE OF STEEL PLATE WITH DOUBLE PHASE STRUCTURE SHOWING HIGH STRENGTH, LOW STRETCH LIMIT AND HIGH DUCITY
JPS5633424A (en) Steel pipe having excellent crushing strength
JPS5328515A (en) Production of ultrahigh strength cold rolled steel sheet by continuous annealing
SE7905817L (en) ALLOY
JPS51148611A (en) Heat-treatment process of steel
JPS5270914A (en) Heat treatment of pipe
JPS6425946A (en) Steel plate having excellent workability and toughness as well as having good hardenability and its production
JPS5323817A (en) Production of low yield ratio, high toughness, high tensile steel plate
JPS57210914A (en) Spring material
JPS52125409A (en) Chrome treated and direct quenched steel wire and its preparation
JPS5779117A (en) Production of ultrathick temper type high tensile steel
JPS5378914A (en) Low alloy steel for large-sized forged product
JPS5635722A (en) Production of thick-walled high tensile large-diameter steel pipe
Loier et al. Structural Transformations and Mechanical Properties of Inconel 718 Alloy
JPS52122219A (en) Production of high tensile steel wire and steel rod from low carbon tempered martensite steel
JPS5722895A (en) Method for forming high strength and high toughness welding metal
JPS535017A (en) High tensile cold rolled steel sheet and its production method
JPS53103923A (en) Production of high tensile strenght bolts
SU124958A1 (en) Structural steel welded
JPS57206515A (en) Production of wire rod for rivet
GB859387A (en) Improvements in or relating to chains
JPS52116718A (en) Vibration damping steel material and its production process
JPS6487014A (en) Bend straightening method for steel material
JPS5681619A (en) Production of tempered high tensile steel plate
JPS5687625A (en) Cooling method after tempering of large-diameter steel pipe