JPS5547323A - Heat treating method for rail - Google Patents

Heat treating method for rail

Info

Publication number
JPS5547323A
JPS5547323A JP12081178A JP12081178A JPS5547323A JP S5547323 A JPS5547323 A JP S5547323A JP 12081178 A JP12081178 A JP 12081178A JP 12081178 A JP12081178 A JP 12081178A JP S5547323 A JPS5547323 A JP S5547323A
Authority
JP
Japan
Prior art keywords
specified
rail head
depth
rail
heat input
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
JP12081178A
Other languages
Japanese (ja)
Other versions
JPS6131163B2 (en
Inventor
Kazuo Kunioka
Takao Noguchi
Yoichi Tamura
Masahiro Ueda
Toshiji Irie
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 JP12081178A priority Critical patent/JPS5547323A/en
Publication of JPS5547323A publication Critical patent/JPS5547323A/en
Publication of JPS6131163B2 publication Critical patent/JPS6131163B2/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
    • C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails

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 form the uniform fime pearlite structure as far as desired depth, keeping easily the specified temperature gradient, by adjusting the preheating temperature to specified range, at the rapid heating pass of the rail head. CONSTITUTION:After the rail head is preheated to 300-650 deg.C, the rapid heating is applied to the rail head keeping the rate of heat input specified to larger than 5X10<5> Kcal per unit area over through the almost whole heat input process. By this treatment, the heating depth is adjusted, and a temperature gradient is formed from the surface to the inside. By foolowed cooling for the surface, the part ranging from surface to a specified depth is transformed into the fine pearlite structure.
JP12081178A 1978-09-30 1978-09-30 Heat treating method for rail Granted JPS5547323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12081178A JPS5547323A (en) 1978-09-30 1978-09-30 Heat treating method for rail

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12081178A JPS5547323A (en) 1978-09-30 1978-09-30 Heat treating method for rail

Publications (2)

Publication Number Publication Date
JPS5547323A true JPS5547323A (en) 1980-04-03
JPS6131163B2 JPS6131163B2 (en) 1986-07-18

Family

ID=14795553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12081178A Granted JPS5547323A (en) 1978-09-30 1978-09-30 Heat treating method for rail

Country Status (1)

Country Link
JP (1) JPS5547323A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60251221A (en) * 1967-08-30 1985-12-11 サントル・ド・ルシエルシユ・メタリユルジク Method and device for improvement on rail manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60251221A (en) * 1967-08-30 1985-12-11 サントル・ド・ルシエルシユ・メタリユルジク Method and device for improvement on rail manufacture

Also Published As

Publication number Publication date
JPS6131163B2 (en) 1986-07-18

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