GB1370144A - Process for heat treating rails having a high wear resistance and the rails treated by said process - Google Patents

Process for heat treating rails having a high wear resistance and the rails treated by said process

Info

Publication number
GB1370144A
GB1370144A GB4401671A GB4401671A GB1370144A GB 1370144 A GB1370144 A GB 1370144A GB 4401671 A GB4401671 A GB 4401671A GB 4401671 A GB4401671 A GB 4401671A GB 1370144 A GB1370144 A GB 1370144A
Authority
GB
United Kingdom
Prior art keywords
rail
rails
water
sprays
air
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.)
Expired
Application number
GB4401671A
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.)
Wendel Sidelor SA
Original Assignee
Wendel Sidelor SA
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 Wendel Sidelor SA filed Critical Wendel Sidelor SA
Publication of GB1370144A publication Critical patent/GB1370144A/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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/009—Pearlite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

1370144 Heat-treating steel rails WENDELSIDELOR 21 Sept 1971 [2 Oct 1970] 44016/71 Headings C7A and C7N Rolled carbon or low alloy steel rails with high carbon and moderate manganese contents are progressively cooled by application of mixed sprays of water and pressurized air to all parts of the rail. Preferably a rail containing by weight: - is cooled from above 750‹C at a mean rate of 10‹ to 20‹ C/sec to 550‹ C or below to produce a pearlitic structure providing a hardness of VPN 380 to 430, 0À2% PS at least 75 daN/mm<SP>2</SP>, U.T.S. at least 115 daN/mm<SP>2</SP> and elongation at least 8%. When the rail after cooling is distorted it may be passed through a second cooling unit where jets of air with or without the addition of water are locally applied to bring about straightening. In a particular form of apparatus the rail is supported by rollers 2, 4, 5 and subjected to sprays 7 from symmetrically disposed distributors 6. Each nozzle 10 is secured to a universally jointed leg 10 and supplied with air and water through flow meters 17, 18 respectively. The secondary cooling unit has a simpler arrangement of sprays shown in Fig.10.
GB4401671A 1970-10-02 1971-09-21 Process for heat treating rails having a high wear resistance and the rails treated by said process Expired GB1370144A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7035661A FR2109121A5 (en) 1970-10-02 1970-10-02

Publications (1)

Publication Number Publication Date
GB1370144A true GB1370144A (en) 1974-10-09

Family

ID=9062187

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4401671A Expired GB1370144A (en) 1970-10-02 1971-09-21 Process for heat treating rails having a high wear resistance and the rails treated by said process

Country Status (6)

Country Link
AT (1) AT323224B (en)
BE (1) BE772926A (en)
FR (1) FR2109121A5 (en)
GB (1) GB1370144A (en)
LU (1) LU63984A1 (en)
ZA (1) ZA716349B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0049004A1 (en) * 1980-07-23 1982-04-07 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Process for making rails, and rails so produced
GB2118579A (en) * 1982-01-29 1983-11-02 British Steel Corp Heat treatment of rails
CN1076757C (en) * 1995-02-04 2001-12-26 Sms舒路曼-斯玛公司 Method and device for cooling hot-rolled shaped material
US6432230B1 (en) 2000-05-29 2002-08-13 Voest-Alpine Schienen Gmbh & Co. Kg Process and device for hardening a rail
EP1493831A1 (en) * 2002-04-05 2005-01-05 Nippon Steel Corporation Pealite based rail excellent in wear resistance and ductility and method for production thereof
USRE40263E1 (en) * 1994-11-15 2008-04-29 Nippon Steel Corporation Pearlitic steel rail having excellent wear resistance and method of producing the same
US8715565B2 (en) 2008-02-27 2014-05-06 Nippon Steel & Sumitomo Metal Corporation Cooling system and cooling method of rolling steel
CN107208216A (en) * 2015-01-23 2017-09-26 新日铁住金株式会社 Rail
JPWO2020189232A1 (en) * 2019-03-15 2021-12-09 日本製鉄株式会社 rail

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846183A (en) * 1973-05-02 1974-11-05 Bethlehem Steel Corp Method of treating steel rail
DE2927890C2 (en) * 1979-07-11 1983-12-22 Elektro-Thermit Gmbh, 4300 Essen Rail for track-bound vehicles
CA1193176A (en) * 1982-07-06 1985-09-10 Robert J. Ackert Method for the production of improved railway rails by accelerated colling in line with the production rolling mill
LU84417A1 (en) * 1982-10-11 1984-05-10 Centre Rech Metallurgique IMPROVED PROCESS FOR THE MANUFACTURE OF RAILS AND RAILS OBTAINED BY THIS PROCESS
BE899617A (en) * 1984-05-09 1984-11-09 Centre Rech Metallurgique IMPROVED METHOD AND DEVICE FOR MANUFACTURING RAILS.
AT384624B (en) * 1986-05-22 1987-12-10 Voest Alpine Ag DEVICE FOR CONTROLLED HEAT TREATMENT OF SOFT PARTS
US4886558A (en) * 1987-05-28 1989-12-12 Nkk Corporation Method for heat-treating steel rail head
CN1041443C (en) * 1993-12-20 1998-12-30 新日本制铁株式会社 Rail of high abrasion resistance and high tenacity having pearlite metalographic structure and method of manufacturing the same
AT402941B (en) 1994-07-19 1997-09-25 Voest Alpine Schienen Gmbh METHOD AND DEVICE FOR THE HEAT TREATMENT OF PROFILED ROLLING MATERIAL
IN191289B (en) 1994-07-19 2003-11-01 Voest Alpine Schienen Gmbh
FR2738843B1 (en) * 1995-09-20 1997-10-17 Sogerail METHOD FOR HEAT TREATING A STEEL RAIL

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0049004A1 (en) * 1980-07-23 1982-04-07 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Process for making rails, and rails so produced
GB2118579A (en) * 1982-01-29 1983-11-02 British Steel Corp Heat treatment of rails
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
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
CN1076757C (en) * 1995-02-04 2001-12-26 Sms舒路曼-斯玛公司 Method and device for cooling hot-rolled shaped material
US6432230B1 (en) 2000-05-29 2002-08-13 Voest-Alpine Schienen Gmbh & Co. Kg Process and device for hardening a rail
EP1493831A1 (en) * 2002-04-05 2005-01-05 Nippon Steel Corporation Pealite based rail excellent in wear resistance and ductility and method for production thereof
EP1493831A4 (en) * 2002-04-05 2006-12-06 Nippon Steel Corp Pealite based rail excellent in wear resistance and ductility and method for production thereof
EP2388352A1 (en) * 2002-04-05 2011-11-23 Nippon Steel Corporation Pearlitic steel rail excellent in wear resistance and ductility and method for producing the same
US8715565B2 (en) 2008-02-27 2014-05-06 Nippon Steel & Sumitomo Metal Corporation Cooling system and cooling method of rolling steel
US9255304B2 (en) 2008-02-27 2016-02-09 Nippon Steel & Sumitomo Metal Corporation Cooling system and cooling method of rolling steel
CN107208216A (en) * 2015-01-23 2017-09-26 新日铁住金株式会社 Rail
US10047411B2 (en) 2015-01-23 2018-08-14 Nippon Steel & Sumitomo Metal Corporation Rail
CN107208216B (en) * 2015-01-23 2019-02-12 新日铁住金株式会社 Rail
JPWO2020189232A1 (en) * 2019-03-15 2021-12-09 日本製鉄株式会社 rail
JP7136324B2 (en) 2019-03-15 2022-09-13 日本製鉄株式会社 rail

Also Published As

Publication number Publication date
LU63984A1 (en) 1972-03-01
DE2148722B2 (en) 1975-04-24
DE2148722A1 (en) 1972-05-10
FR2109121A5 (en) 1972-05-26
AT323224B (en) 1975-06-25
BE772926A (en) 1972-03-21
ZA716349B (en) 1972-05-31

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee