EP0049004A1 - Verfahren zur Herstellung von Schienen und so hergestellte Schienen - Google Patents

Verfahren zur Herstellung von Schienen und so hergestellte Schienen Download PDF

Info

Publication number
EP0049004A1
EP0049004A1 EP81200823A EP81200823A EP0049004A1 EP 0049004 A1 EP0049004 A1 EP 0049004A1 EP 81200823 A EP81200823 A EP 81200823A EP 81200823 A EP81200823 A EP 81200823A EP 0049004 A1 EP0049004 A1 EP 0049004A1
Authority
EP
European Patent Office
Prior art keywords
rail
rails
seconds
bead
cooling
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.)
Withdrawn
Application number
EP81200823A
Other languages
English (en)
French (fr)
Inventor
Nicole Lambert
René Conti
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
Metallurgique Et Miniere De Rodange-Athus SA
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
Metallurgique Et Miniere De Rodange-Athus 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 Centre de Recherches Metallurgiques CRM ASBL, Metallurgique Et Miniere De Rodange-Athus SA filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of EP0049004A1 publication Critical patent/EP0049004A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents
    • 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
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath quenching

Definitions

  • the present invention relates to an improved process for manufacturing rails and in particular high resistance rails.
  • the process is especially applicable to steels containing 0.4 to 0.85% of C and from 0.4 to 1% of Mn, 0.1 to 0.4% of Si, and preferably from 0.6 to 0 , 85% C, and 0.6-0.8% Mn.
  • the object of the present invention is precisely a particularly simple process which makes it possible to eliminate the drawbacks mentioned above.
  • the process which is the subject of the present invention is essentially characterized in that, at the outlet from the hot rolling mill, the rail is left in the open air for at least 45 seconds, and preferably until the center of the bead reaches a temperature between 780 ° C and 680 ° C, then the rail is introduced into a tank containing an aqueous bath brought to a temperature above 75 ° C, and preferably substantially at boiling temperature, the said rail y being introduced in a substantially horizontal position, but with the shoe down (so-called "standing" position).
  • the duration of stay in the open air is less than 400 seconds; this duration varies according to the profile of the rail and its temperature at the end of rolling.
  • the duration of the immersion of the rail in the aqueous bath is at least equal to that necessary to obtain at least 80% of the allotropic transformation of the steel in the bead, and preferably between 50 seconds and 90 seconds .
  • the position of the rail unexpectedly plays an essential role in the kinetics of cooling in water.
  • the heat exchanges are particularly intense on the upper face of the bead and greatly slowed down. on the underside of the skate.
  • the bead cools further. quickly and the pad slower, whereas the reverse occurs when the rail is submerged in the "pad up" position (so-called "inverted" position).
  • the field of the invention also extends to the different kinds of rails obtained by means of the methods described above.
  • Position a of the rail represents the "standing" position, that is to say with the shoe at the bottom
  • position b of the rail represents the inverted position, that is to say with the shoe at the top.
  • the rail steel contains 0.72% C and 0.63% Mn.
  • the rail was cooled in the open air for 45 seconds, then immersed in an aqueous bath at boiling temperature.
  • the zone marked 1 corresponds to a breaking strength less than or equal to 1080 MPa ( ⁇ 321 HB); the zone marked 2 corresponds to a breaking strength of 1080 to 1180 MPa; the zone marked 3 corresponds to a breaking strength of between 1180 and 1226 MPa (350 to 380 HB).

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 Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Articles (AREA)
EP81200823A 1980-07-23 1981-07-21 Verfahren zur Herstellung von Schienen und so hergestellte Schienen Withdrawn EP0049004A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE6/47223A BE884443A (fr) 1980-07-23 1980-07-23 Perfectionnements aux procedes de fabrication de rails a haute resistance
BE647223 1980-07-23

Publications (1)

Publication Number Publication Date
EP0049004A1 true EP0049004A1 (de) 1982-04-07

Family

ID=3874862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200823A Withdrawn EP0049004A1 (de) 1980-07-23 1981-07-21 Verfahren zur Herstellung von Schienen und so hergestellte Schienen

Country Status (4)

Country Link
EP (1) EP0049004A1 (de)
JP (1) JPS5785929A (de)
BE (1) BE884443A (de)
PL (1) PL232333A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0108436A1 (de) * 1982-10-11 1984-05-16 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Verfahren zum Herstellen von Schienen und so hergestellte Schienen
DE4200545A1 (de) * 1992-01-11 1993-07-15 Butzbacher Weichenbau Gmbh Gleisteile sowie verfahren zur herstellung dieser
US5261130A (en) * 1992-04-01 1993-11-16 Kendall Desmond M Spacer for supporting water catchment basins
WO1994002652A1 (de) * 1992-07-15 1994-02-03 Voest-Alpine Schienen Gmbh Verfahren zum wärmebehandeln von schienen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2009218189B2 (en) 2008-02-27 2014-05-22 Nippon Steel Corporation Cooling system and cooling method of rolling steel

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR709949A (fr) * 1930-02-05 1931-08-14 Bethlehem Steel Corp Perfectionnements au traitement thermique de corps métalliques, plus particulièrement de rails
BE680222A (de) * 1965-04-28 1966-10-03
BE754416A (fr) * 1970-08-04 1971-02-04 Centre Rech Metallurgique Procede de traitement de produits metalliques.
US3785878A (en) * 1969-08-19 1974-01-15 Centre Nat Rech Metall Treatment of metal rod or wire
GB1370144A (en) * 1970-10-02 1974-10-09 Wendel Sidelor Process for heat treating rails having a high wear resistance and the rails treated by said process
US3846183A (en) * 1973-05-02 1974-11-05 Bethlehem Steel Corp Method of treating steel rail
FR2281990A1 (fr) * 1974-08-16 1976-03-12 Krupp Ag Huettenwerke Procede de traitement thermique de rails
BE854834A (fr) * 1977-05-18 1977-09-16 Centre Rech Metallurgique Procede de fabrication de rails a caracteristiques ameliorees
FR2425476A1 (fr) * 1978-05-12 1979-12-07 Nippon Steel Corp Procede pour la fabrication de rails a haute resistance tres soudables

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR709949A (fr) * 1930-02-05 1931-08-14 Bethlehem Steel Corp Perfectionnements au traitement thermique de corps métalliques, plus particulièrement de rails
BE680222A (de) * 1965-04-28 1966-10-03
US3785878A (en) * 1969-08-19 1974-01-15 Centre Nat Rech Metall Treatment of metal rod or wire
BE754416A (fr) * 1970-08-04 1971-02-04 Centre Rech Metallurgique Procede de traitement de produits metalliques.
GB1370144A (en) * 1970-10-02 1974-10-09 Wendel Sidelor Process for heat treating rails having a high wear resistance and the rails treated by said process
US3846183A (en) * 1973-05-02 1974-11-05 Bethlehem Steel Corp Method of treating steel rail
FR2281990A1 (fr) * 1974-08-16 1976-03-12 Krupp Ag Huettenwerke Procede de traitement thermique de rails
BE854834A (fr) * 1977-05-18 1977-09-16 Centre Rech Metallurgique Procede de fabrication de rails a caracteristiques ameliorees
FR2425476A1 (fr) * 1978-05-12 1979-12-07 Nippon Steel Corp Procede pour la fabrication de rails a haute resistance tres soudables

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0108436A1 (de) * 1982-10-11 1984-05-16 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Verfahren zum Herstellen von Schienen und so hergestellte Schienen
DE4200545A1 (de) * 1992-01-11 1993-07-15 Butzbacher Weichenbau Gmbh Gleisteile sowie verfahren zur herstellung dieser
US5261130A (en) * 1992-04-01 1993-11-16 Kendall Desmond M Spacer for supporting water catchment basins
WO1994002652A1 (de) * 1992-07-15 1994-02-03 Voest-Alpine Schienen Gmbh Verfahren zum wärmebehandeln von schienen
US6406569B1 (en) 1992-07-15 2002-06-18 Voest-Alpine Schienen Gmbh Procedure for the thermal treatment of rails
US6547897B2 (en) 1992-07-15 2003-04-15 Voest-Alpine Schienen Gmbh Procedure for the thermal treatment of rails

Also Published As

Publication number Publication date
BE884443A (fr) 1981-01-23
PL232333A1 (de) 1982-02-15
JPS5785929A (en) 1982-05-28

Similar Documents

Publication Publication Date Title
EP2171112B1 (de) Verfahren zur herstellung eines stahlblechs mit sehr hohen festigkeits- und biegbarkeitseigenschaften und in diesem verfahren hergestellte bleche
CA2680623C (fr) Acier pour formage a chaud ou trempe sous outil, a ductilite amelioree
EP1913169B1 (de) Herstellungsprozess von stahlblechen mit hoher festigkeit und exzellenter dehnung und hergestellte produkte
FR2536765A1 (fr) Procede de fabrication de plaques d'acier ayant une resistance elevee a la traction
WO2011037210A1 (ja) 高強度高靭性鋳鋼材及びその製造方法
WO2012153008A1 (fr) Procede de fabrication d'acier martensitique a tres haute resistance et tole ou piece ainsi obtenue
EP0051511B1 (de) Gegossene Walze zum Kaltwalzen und Verfahren zu ihrer Herstellung
FR2477179A1 (fr) Acier inoxydable austenitique contenant du cuivre et de l'azote et ses applications a l'obtention de bandes, tubes, barres ou tiges
FR2486101A1 (fr) Tole d'acier laminee a froid, de solidite elevee, formable par pressage de structure a deux phases et procede pour la production de cette tole
JP2021176991A (ja) 高伸長プレス硬化鋼及びその製造
EP2957643A1 (de) Stahl für mechanische werkstücke mit hochwertigen eigenschaften und oberflächenbehandlung, und mechanische werkstücke aus diesem stahl und ihr herstellungsverfahren
WO2011104443A1 (fr) Procédé de fabrication d'une pièce a partir d'une tôle revêtue d'aluminium ou d'alliage d'aluminium
FR2508489A1 (fr) Procede de production d'un acier homogene
EP0049004A1 (de) Verfahren zur Herstellung von Schienen und so hergestellte Schienen
EP0108436A1 (de) Verfahren zum Herstellen von Schienen und so hergestellte Schienen
LU82202A1 (fr) Procede pour fabrique des produits lamines en acier a haute limite elastique
JPH10511141A (ja) 焼き付け硬化性を有するバナジウムを含むスチール
FR2470163A1 (fr) Procede de fabrication d'une tole d'acier laminee a froid a resistance a la traction elevee a deux phases, ayant une meilleure aptitude au travail
US4793869A (en) Continuous treatment of cold-rolled carbon manganese steel
US4793870A (en) Continuous treatment of cold-rolled carbon high manganese steel
US2069205A (en) Method of producing iron chromium alloys of appreciable nitrogen content
BE1015018A3 (fr) Procede pour le traitement thermique d'une bande d'acier laminee a froid, procede de fabrication d'une bande d'acier adaptee au fromage et bande d'acier ainsi obtenue.
FR2712606A1 (fr) Procédé d'élaboration d'une charge de fonte à graphite sphéroïdal à caractéristiques mécaniques élevées.
FR2470164A1 (fr) Procede de fabrication d'une tole d'acier lamine a froid de haute resistance a la traction ayant une excellente aptitude a la peinture, au soudage et au formage
US20240229214A1 (en) Flat steel product having an al-coating, process for production thereof, steel component and process for production thereof

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT LU

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830131

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LAMBERT, NICOLE

Inventor name: CONTI, RENE