IN2014DN10577A - - Google Patents

Info

Publication number
IN2014DN10577A
IN2014DN10577A IN10577DEN2014A IN2014DN10577A IN 2014DN10577 A IN2014DN10577 A IN 2014DN10577A IN 10577DEN2014 A IN10577DEN2014 A IN 10577DEN2014A IN 2014DN10577 A IN2014DN10577 A IN 2014DN10577A
Authority
IN
India
Prior art keywords
cooling
rail
cooled
austenite
phase
Prior art date
Application number
Inventor
Alberto Gioachino Lainati
Luigi Langellotto
Andrea Mazzarano
Federico Pegorin
Alessio Saccocci
Augusto Sciuccati
Original Assignee
Siemens Spa Italiana
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 Siemens Spa Italiana filed Critical Siemens Spa Italiana
Publication of IN2014DN10577A publication Critical patent/IN2014DN10577A/en

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
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • 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
    • 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
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C21D1/667—Quenching devices for spray 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
    • C21D11/00—Process control or regulation for heat treatments
    • 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
    • C21D2211/002—Bainite
    • 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
    • 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
    • C21D2221/00—Treating localised areas of an article
    • 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
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/10—Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively
    • 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)
  • Control Of Heat Treatment Processes (AREA)

Abstract

Method of thermal treatment of hot rails to obtain a desired microstructure having enhanced mechanical properties the method comprising an active cooling phase wherein the rail is fast cooled from an austenite temperature and subsequently soft cooled to maintain a target transformation temperature between defined values the cooling treatment being performed by a plurality of cooling modules (12.n) each cooling module comprising a plurality of means spraying a cooling medium onto the rail the process being characterised in that during the active cooling phase each cooling means is driven to control the cooling rate of the rail such that the amount of transformed austenite within the rail is not lower than 50% on rail surface and not lower than 20% at rail head core.
IN10577DEN2014 2012-06-11 2013-06-07 IN2014DN10577A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20120425110 EP2674504A1 (en) 2012-06-11 2012-06-11 Method and system for thermal treatments of rails
PCT/EP2013/061793 WO2013186137A1 (en) 2012-06-11 2013-06-07 Method and system for thermal treatments of rails

Publications (1)

Publication Number Publication Date
IN2014DN10577A true IN2014DN10577A (en) 2015-08-28

Family

ID=48832867

Family Applications (1)

Application Number Title Priority Date Filing Date
IN10577DEN2014 IN2014DN10577A (en) 2012-06-11 2013-06-07

Country Status (11)

Country Link
US (1) US10125405B2 (en)
EP (2) EP2674504A1 (en)
JP (1) JP6261570B2 (en)
KR (1) KR102139204B1 (en)
CN (2) CN108277336A (en)
BR (1) BR112014031014B1 (en)
ES (1) ES2951582T3 (en)
IN (1) IN2014DN10577A (en)
PL (1) PL2859127T3 (en)
RU (1) RU2637197C2 (en)
WO (1) WO2013186137A1 (en)

Families Citing this family (13)

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Publication number Priority date Publication date Assignee Title
RU2614861C2 (en) * 2014-01-13 2017-03-29 Общество С Ограниченной Ответственностью Научно-Производственное Предприятие "Томская Электронная Компания" Method and device for steel article heat treatment
ES2794621T3 (en) * 2015-01-23 2020-11-18 Nippon Steel Corp Via
DE102016201025A1 (en) * 2016-01-25 2017-07-27 Schwartz Gmbh Heat treatment process and heat treatment device
WO2018168969A1 (en) * 2017-03-15 2018-09-20 Ｊｆｅスチール株式会社 Cooling device and production method for rail
CZ308471B6 (en) * 2019-08-19 2020-09-02 Západočeská Univerzita V Plzni Method of manufacturing steel parts from AHS steel by controlled local cooling with a medium, using the formation of a multiphase structure with intermittent cooling at the required temperature
CN110643803B (en) * 2019-11-05 2023-10-27 中国铁建重工集团股份有限公司道岔分公司 Heating device and rod piece heating method
CN110656230B (en) * 2019-11-05 2024-01-19 中国铁建重工集团股份有限公司道岔分公司 Heating device and rod piece heating method
JP7294243B2 (en) * 2020-06-10 2023-06-20 Ｊｆｅスチール株式会社 HARDNESS PREDICTION METHOD FOR HEAT-TREATED RAIL, HEAT TREATMENT METHOD, HARDNESS PREDICTION DEVICE, HEAT TREATMENT APPARATUS, MANUFACTURING METHOD, MANUFACTURING EQUIPMENT, AND HARDNESS PREDICTION MODEL GENERATION METHOD
CN112226609B (en) * 2020-10-23 2022-03-22 攀钢集团攀枝花钢铁研究院有限公司 Construction method for heat treatment of post-welded joints of dissimilar steel rails
CN113416818B (en) * 2021-05-12 2022-09-23 包头钢铁（集团）有限责任公司 Heat treatment process of high-strength and high-toughness bainite/martensite multiphase bainite steel rail
CN113444860B (en) * 2021-06-28 2022-07-01 二重（德阳）重型装备有限公司 Quenching method for workpieces with large thickness difference
CN113755670B (en) * 2021-08-24 2022-10-25 中铁宝桥集团有限公司 Quenching and cooling method for bainitic steel frog point rail
WO2023131913A1 (en) * 2022-01-10 2023-07-13 Hydro Extrusion USA, LLC System and method for automatic spray quenching

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JPS54147124A (en) * 1978-05-10 1979-11-17 Nippon Kokan Kk <Nkk> Heat treating method for rail
JPS58133317A (en) 1982-02-02 1983-08-09 Topy Ind Ltd Heat treating and cooling method and apparatus
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
BE899617A (en) * 1984-05-09 1984-11-09 Centre Rech Metallurgique IMPROVED METHOD AND DEVICE FOR MANUFACTURING RAILS.
EP0186373B1 (en) * 1984-12-24 1990-09-12 Nippon Steel Corporation Method of and apparatus for heat treating rails
JPS61149436A (en) 1984-12-24 1986-07-08 Nippon Steel Corp Heat treatment of rail
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JPH09316598A (en) * 1996-03-27 1997-12-09 Nippon Steel Corp Pearlitic rail, excellent in wear resistance and weldability, and its production
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Also Published As

Publication number Publication date
EP2859127C0 (en) 2023-06-07
CN104508153A (en) 2015-04-08
EP2859127B1 (en) 2023-06-07
RU2014154400A (en) 2016-08-10
US20150107727A1 (en) 2015-04-23
JP2015523467A (en) 2015-08-13
US10125405B2 (en) 2018-11-13
EP2859127A1 (en) 2015-04-15
RU2637197C2 (en) 2017-11-30
CN108277336A (en) 2018-07-13
KR20150045996A (en) 2015-04-29
BR112014031014A2 (en) 2017-06-27
KR102139204B1 (en) 2020-07-30
BR112014031014B1 (en) 2019-09-10
JP6261570B2 (en) 2018-01-17
EP2674504A1 (en) 2013-12-18
WO2013186137A1 (en) 2013-12-19
ES2951582T3 (en) 2023-10-23
PL2859127T3 (en) 2023-08-21

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