EP0252895A3 - Method and apparatus for producing high resistant rails - Google Patents

Method and apparatus for producing high resistant rails Download PDF

Info

Publication number
EP0252895A3
EP0252895A3 EP87870094A EP87870094A EP0252895A3 EP 0252895 A3 EP0252895 A3 EP 0252895A3 EP 87870094 A EP87870094 A EP 87870094A EP 87870094 A EP87870094 A EP 87870094A EP 0252895 A3 EP0252895 A3 EP 0252895A3
Authority
EP
European Patent Office
Prior art keywords
rail
rate
cooled
head
point
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
EP87870094A
Other languages
French (fr)
Other versions
EP0252895B1 (en
EP0252895A2 (en
Inventor
Marios Economopoulos
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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 Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Priority to AT87870094T priority Critical patent/ATE81676T1/en
Publication of EP0252895A2 publication Critical patent/EP0252895A2/en
Publication of EP0252895A3 publication Critical patent/EP0252895A3/en
Application granted granted Critical
Publication of EP0252895B1 publication Critical patent/EP0252895B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • 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

Abstract

Starting from a temperature at or above the A3 transformation point of the steel of the rail, the head of the rail is cooled to a temperature not lower than the Ms point at a rate lower than the critical quenching rate so that the head acquires a fine perlitic structure. Simultaneously the web is superficially cooled to the Ms point or below, at a rate greater than the head, so as to obtain a surface layer of martensite and/or bainite, and the surface cooling is controlled so that, at the end of controlled cooling, internal portions of the web not transformed to martensite and/or bainite retain sufficient heat to temper the surface layer during subsequent cooling to ambient temperature. At the same time the flange of the rail is cooled at a rate ensuring straightness of the rail.
EP87870094A 1986-07-10 1987-07-07 Method and apparatus for producing high resistant rails Expired - Lifetime EP0252895B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87870094T ATE81676T1 (en) 1986-07-10 1987-07-07 METHOD AND DEVICE FOR MANUFACTURING HIGH STRENGTH RAILS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU86510 1986-07-10
LU86510A LU86510A1 (en) 1986-07-10 1986-07-10 METHOD AND DEVICE FOR MANUFACTURING A HIGH RESISTANCE RAIL

Publications (3)

Publication Number Publication Date
EP0252895A2 EP0252895A2 (en) 1988-01-13
EP0252895A3 true EP0252895A3 (en) 1990-07-18
EP0252895B1 EP0252895B1 (en) 1992-10-21

Family

ID=19730736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87870094A Expired - Lifetime EP0252895B1 (en) 1986-07-10 1987-07-07 Method and apparatus for producing high resistant rails

Country Status (7)

Country Link
US (1) US4810311A (en)
EP (1) EP0252895B1 (en)
JP (1) JP2716127B2 (en)
AT (1) ATE81676T1 (en)
CA (1) CA1307723C (en)
DE (1) DE3782280D1 (en)
LU (1) LU86510A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5000798A (en) * 1989-11-07 1991-03-19 The Algoma Steel Corporation, Limited Method for shape control of rail during accelerated cooling
US5259229A (en) * 1990-06-21 1993-11-09 Nippon Steel Corporation Apparatus for cooling thin-webbed H-beam steel
DE69113326T2 (en) * 1990-06-21 1996-03-28 Nippon Steel Corp Method and device for producing steel double-T beams with a thin web.
US5306365A (en) * 1992-11-19 1994-04-26 Aluminum Company Of America Apparatus and method for tapered heating of metal billet
US5419792A (en) * 1994-07-25 1995-05-30 General Electric Company Method and apparatus for cooling a workpiece
US6174389B1 (en) 1999-08-17 2001-01-16 Caterpillar Inc. Fixture and method for selectively quenching a predetermined area of a workpiece
US6394793B1 (en) 2001-01-13 2002-05-28 Ladish Company, Incorporated Method and apparatus of cooling heat-treated work pieces
US20030098106A1 (en) * 2001-11-29 2003-05-29 United Technologies Corporation Method and apparatus for heat treating material
US9840747B2 (en) 2013-02-20 2017-12-12 Rolls-Royce Corporation Wall member useful in quenching

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098492A2 (en) * 1982-07-06 1984-01-18 The Algoma Steel Corporation, Limited Method for the production of railway rails by accelerated cooling in line with the production rolling mill
EP0108436A1 (en) * 1982-10-11 1984-05-16 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Rail making process and rails so produced
EP0136613A2 (en) * 1983-10-04 1985-04-10 Krupp Stahl AG Rail having a high wear resistance in the head and a high resistance to rupture in the base
EP0161236A2 (en) * 1984-05-09 1985-11-13 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Apparatus for manufacturing rails
EP0186373B1 (en) * 1984-12-24 1990-09-12 Nippon Steel Corporation Method of and apparatus for heat treating rails

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6715168A (en) * 1967-08-30 1969-03-04
US4203783A (en) * 1977-09-19 1980-05-20 Centre De Recherches Metallurgiques Process for improving the quality of steel sections
JPS5547322A (en) * 1978-09-30 1980-04-03 Nippon Kokan Kk <Nkk> Heat treating method for rail
JPS5832219A (en) * 1981-08-19 1983-02-25 Matsushita Electric Ind Co Ltd Step-up type magnetic head
US4486248A (en) * 1982-08-05 1984-12-04 The Algoma Steel Corporation Limited Method for the production of improved railway rails by accelerated cooling in line with the production rolling mill
JPS59169337U (en) * 1983-04-25 1984-11-13 日本鋼管株式会社 Steel cooling floor
DE3446794C1 (en) * 1984-12-21 1986-01-02 BWG Butzbacher Weichenbau GmbH, 6308 Butzbach Process for the heat treatment of pearlitic rail steel
JPS6299438A (en) * 1985-10-24 1987-05-08 Nippon Kokan Kk <Nkk> Wear-resistant high-efficiency rail having instable fracture propagation stopping capacity
DE59303756D1 (en) * 1993-02-26 1996-10-17 Rueti Ag Maschf Insertion device for a row shed weaving machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098492A2 (en) * 1982-07-06 1984-01-18 The Algoma Steel Corporation, Limited Method for the production of railway rails by accelerated cooling in line with the production rolling mill
EP0108436A1 (en) * 1982-10-11 1984-05-16 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Rail making process and rails so produced
EP0136613A2 (en) * 1983-10-04 1985-04-10 Krupp Stahl AG Rail having a high wear resistance in the head and a high resistance to rupture in the base
EP0161236A2 (en) * 1984-05-09 1985-11-13 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Apparatus for manufacturing rails
EP0186373B1 (en) * 1984-12-24 1990-09-12 Nippon Steel Corporation Method of and apparatus for heat treating rails

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 11, no. 315 (C-451)(2762) 14 octobre 1987; & JP-A-62 099 438 (Nippon Kokan) 08.05.1987 *

Also Published As

Publication number Publication date
CA1307723C (en) 1992-09-22
LU86510A1 (en) 1988-02-02
EP0252895B1 (en) 1992-10-21
US4810311A (en) 1989-03-07
JP2716127B2 (en) 1998-02-18
JPS6328824A (en) 1988-02-06
ATE81676T1 (en) 1992-11-15
EP0252895A2 (en) 1988-01-13
DE3782280D1 (en) 1992-11-26

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