JPS55125231A - Production of weldable low alloy heat treated hard top rail - Google Patents

Production of weldable low alloy heat treated hard top rail

Info

Publication number
JPS55125231A
JPS55125231A JP3141879A JP3141879A JPS55125231A JP S55125231 A JPS55125231 A JP S55125231A JP 3141879 A JP3141879 A JP 3141879A JP 3141879 A JP3141879 A JP 3141879A JP S55125231 A JPS55125231 A JP S55125231A
Authority
JP
Japan
Prior art keywords
rail
low alloy
production
heat treated
top rail
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
JP3141879A
Other languages
Japanese (ja)
Other versions
JPS5919173B2 (en
Inventor
Koki Masumoto
Kazuo Sugino
Hideaki Kageyama
Hiroto Hamahashi
Hiroshi Hayashida
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 JP3141879A priority Critical patent/JPS5919173B2/en
Publication of JPS55125231A publication Critical patent/JPS55125231A/en
Publication of JPS5919173B2 publication Critical patent/JPS5919173B2/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 produce the rail which is easy to weld and forms the zeld zone in which the material characteristics, such as strength and structure of the weld zone, have not much difference from those of base metals, by making the cooling conditions equivalent to the rate of cooling at the rail welding at the time of heat-treating the top part of the rail made of high carbon low alloy steel. CONSTITUTION:The rail is produced by the high carbon low alloy steel which contains C; 0.55-0.85%, Si; 0.50-1.20%, Mn; 0.80-1.50%, Al; 0.005-0.05% or further contains Cr; 0.20-0.90%, Nb; 0.004-0.010% and contains these so that the total amount of Cr+Mn becomes 1.60% or less. The top surface layer of this rail is heated to 850 deg.C or more to austenitize its structure, after which it is quenched at 50-400 seconds between 800 deg.C and 550 deg.C. The structure becomes fine pearlite from the rail top surface layer down to a depth of 10mm and the rail of the superior weldability whose tensile strength at ordinary temperature is 120kg/mm<2> or more and surface hardness HB330 or more may be produced.
JP3141879A 1979-03-17 1979-03-17 Manufacturing method of weldable low-alloy heat-treated hard-headed rail Expired JPS5919173B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3141879A JPS5919173B2 (en) 1979-03-17 1979-03-17 Manufacturing method of weldable low-alloy heat-treated hard-headed rail

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3141879A JPS5919173B2 (en) 1979-03-17 1979-03-17 Manufacturing method of weldable low-alloy heat-treated hard-headed rail

Publications (2)

Publication Number Publication Date
JPS55125231A true JPS55125231A (en) 1980-09-26
JPS5919173B2 JPS5919173B2 (en) 1984-05-02

Family

ID=12330704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3141879A Expired JPS5919173B2 (en) 1979-03-17 1979-03-17 Manufacturing method of weldable low-alloy heat-treated hard-headed rail

Country Status (1)

Country Link
JP (1) JPS5919173B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57198216A (en) * 1981-05-27 1982-12-04 Nippon Kokan Kk <Nkk> Manufacture of high-strength rail
JPS62127453A (en) * 1985-11-26 1987-06-09 Nippon Kokan Kk <Nkk> High-efficiency rail excellent in toughness and ductility and its production
JPS62278247A (en) * 1986-02-17 1987-12-03 Nippon Kokan Kk <Nkk> High-carbon steel material for hot-pressure welding excellent in property at welded joint
JPS6324045A (en) * 1986-07-16 1988-02-01 Nippon Kokan Kk <Nkk> Wear resistant rail having high performance and superior capacity to stop propagation of unstable rupture
JPH02282448A (en) * 1989-04-20 1990-11-20 Nippon Steel Corp Rail having excellent rolling contact fatigue damage resistance
US5482576A (en) * 1992-01-11 1996-01-09 Bwg Butzbacher Weichenbau, Gmbh Railway-track elements and method of manufacturing them
USRE40263E1 (en) 1994-11-15 2008-04-29 Nippon Steel Corporation Pearlitic steel rail having excellent wear resistance and method of producing the same
CN112063826A (en) * 2020-08-28 2020-12-11 攀钢集团攀枝花钢铁研究院有限公司 1300 MPa-level low-alloy heat treatment steel rail postweld heat treatment method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU663023B2 (en) * 1993-02-26 1995-09-21 Nippon Steel Corporation Process for manufacturing high-strength bainitic steel rails with excellent rolling-contact fatigue resistance

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57198216A (en) * 1981-05-27 1982-12-04 Nippon Kokan Kk <Nkk> Manufacture of high-strength rail
JPS6323244B2 (en) * 1981-05-27 1988-05-16 Nippon Kokan Kk
JPS62127453A (en) * 1985-11-26 1987-06-09 Nippon Kokan Kk <Nkk> High-efficiency rail excellent in toughness and ductility and its production
JPH0530883B2 (en) * 1985-11-26 1993-05-11 Nippon Kokan Kk
JPH0443978B2 (en) * 1986-02-17 1992-07-20 Nippon Kokan Kk
JPS62278247A (en) * 1986-02-17 1987-12-03 Nippon Kokan Kk <Nkk> High-carbon steel material for hot-pressure welding excellent in property at welded joint
JPS6324045A (en) * 1986-07-16 1988-02-01 Nippon Kokan Kk <Nkk> Wear resistant rail having high performance and superior capacity to stop propagation of unstable rupture
JPH02282448A (en) * 1989-04-20 1990-11-20 Nippon Steel Corp Rail having excellent rolling contact fatigue damage resistance
US5482576A (en) * 1992-01-11 1996-01-09 Bwg Butzbacher Weichenbau, Gmbh Railway-track elements and method of manufacturing them
USRE40263E1 (en) 1994-11-15 2008-04-29 Nippon Steel Corporation Pearlitic steel rail having excellent wear resistance and method of producing the same
USRE41033E1 (en) 1994-11-15 2009-12-08 Nippn Steel Corporation Pearlitic steel rail having excellent wear resistance and method of producing the same
USRE42360E1 (en) 1994-11-15 2011-05-17 Nippon Steel Corporation Pearlitic steel rail having excellent wear resistance and method of producing the same
USRE42668E1 (en) 1994-11-15 2011-09-06 Nippon Steel Corporation Pearlitic steel rail having excellent wear resistance and method of producing the same
CN112063826A (en) * 2020-08-28 2020-12-11 攀钢集团攀枝花钢铁研究院有限公司 1300 MPa-level low-alloy heat treatment steel rail postweld heat treatment method

Also Published As

Publication number Publication date
JPS5919173B2 (en) 1984-05-02

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