JPS55138026A - Method of treating rail with heat to heighten rupture strength of neck of said rail - Google Patents

Method of treating rail with heat to heighten rupture strength of neck of said rail

Info

Publication number
JPS55138026A
JPS55138026A JP4504179A JP4504179A JPS55138026A JP S55138026 A JPS55138026 A JP S55138026A JP 4504179 A JP4504179 A JP 4504179A JP 4504179 A JP4504179 A JP 4504179A JP S55138026 A JPS55138026 A JP S55138026A
Authority
JP
Japan
Prior art keywords
rail
neck
rupture strength
heat
heighten
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
JP4504179A
Other languages
Japanese (ja)
Other versions
JPS5911645B2 (en
Inventor
Koki Masumoto
Kazuo Sugino
Shinichi Nishida
Chikayuki Urashima
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 JP4504179A priority Critical patent/JPS5911645B2/en
Publication of JPS55138026A publication Critical patent/JPS55138026A/en
Publication of JPS5911645B2 publication Critical patent/JPS5911645B2/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
    • C21D9/04—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 provide a rail, the rupture strength of whose neck is high, by heating the top and side of the head of the rail and its neck above the A1 transformation point and thereafter rapidly and uniformly cooling the heated portions in a coolant. CONSTITUTION:A heater 6 is provided on the transfer line of a rail R so that the heater surrounds the top 2 and side 3 of the heat of the rail and its neck 1. After the entire head of the rail R is heated to a temperature above the A1 transformation point, almost equal quantities of a coolant are ejected from a cooler 7 onto the top 2, the side 3 and the neck 1. These portions are thus uniformly and rapidly cooled so that no excessive tensile stress remains in the neck 1 of the rail. This results in making the rupture strength of the neck 1 of the rail much higher than that of a conventional heat-treated rail.
JP4504179A 1979-04-13 1979-04-13 Rail heat treatment method with excellent fracture resistance at the top and bottom of the rail Expired JPS5911645B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4504179A JPS5911645B2 (en) 1979-04-13 1979-04-13 Rail heat treatment method with excellent fracture resistance at the top and bottom of the rail

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4504179A JPS5911645B2 (en) 1979-04-13 1979-04-13 Rail heat treatment method with excellent fracture resistance at the top and bottom of the rail

Publications (2)

Publication Number Publication Date
JPS55138026A true JPS55138026A (en) 1980-10-28
JPS5911645B2 JPS5911645B2 (en) 1984-03-16

Family

ID=12708272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4504179A Expired JPS5911645B2 (en) 1979-04-13 1979-04-13 Rail heat treatment method with excellent fracture resistance at the top and bottom of the rail

Country Status (1)

Country Link
JP (1) JPS5911645B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953630A (en) * 1982-09-22 1984-03-28 Nippon Steel Corp Production of rail having excellent resistance characteristic to split web at rail end
US6566697B1 (en) 2000-11-28 2003-05-20 Dalsa, Inc. Pinned photodiode five transistor pixel
US6713796B1 (en) 2001-01-19 2004-03-30 Dalsa, Inc. Isolated photodiode

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61115037U (en) * 1984-12-27 1986-07-21

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953630A (en) * 1982-09-22 1984-03-28 Nippon Steel Corp Production of rail having excellent resistance characteristic to split web at rail end
US6566697B1 (en) 2000-11-28 2003-05-20 Dalsa, Inc. Pinned photodiode five transistor pixel
US6713796B1 (en) 2001-01-19 2004-03-30 Dalsa, Inc. Isolated photodiode

Also Published As

Publication number Publication date
JPS5911645B2 (en) 1984-03-16

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