EP1432835A2 - Verfahren und anlage zur thermischen behandlung von schienen - Google Patents
Verfahren und anlage zur thermischen behandlung von schienenInfo
- Publication number
- EP1432835A2 EP1432835A2 EP02777151A EP02777151A EP1432835A2 EP 1432835 A2 EP1432835 A2 EP 1432835A2 EP 02777151 A EP02777151 A EP 02777151A EP 02777151 A EP02777151 A EP 02777151A EP 1432835 A2 EP1432835 A2 EP 1432835A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- rail
- rail head
- thermal treatment
- temperature
- 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
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
- 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
- C21D1/84—Controlled slow 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
- 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
- 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
- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
Definitions
- the invention relates to a method and a system for the thermal treatment of rails, in particular of hot-rolled track or railroad tracks with profile parts of different masses, the rails being removed from the rolling heat by targeted thermal treatment and cooling in the profile parts in the profile area, in particular in the rail head, obtain a desired structure with increased strength.
- the rolling stock has an average temperature of at most 1100 ° C., but at least 750 ° C. is just aligned, then brought in the transverse direction and cooled in a first cooling section with the same local cooling intensity to a temperature between 860 ° C to 5 to 120 ° C above the Ar temperature, then in a second cooling step with the same, seen in cross section with circumferentially Different cooling intensity, depending on the volume fraction based on the surface, extracts heat from the rolling stock in the longitudinal direction, thereby creating a structural transformation into a martensite-free, fine pearlitic structure, after which the cooling to room temperature is continued in a subsequent step with the same local cooling intensity.
- the cooling section would have to be operated with a significantly lower heat flow density, or the heat transfer coefficient to be set would have to be set approximately 30 to 40% lower in order to avoid the formation of bainite in the edge zones of the rail head. This would then result in a considerably longer time, a larger lamella spacing and, associated with this, lower hardness values in the pearlite structure for the core area.
- the targeted pre-cooling to a core temperature of the rail head of 750 to 850 ° C can be carried out according to the invention by cooling in air with natural convection or forced with the help of fans.
- nozzles it is also possible to use nozzles to cool with a water-air mixture (aerosol cooling), this cooling preferably being carried out on a cross tractor with a corresponding number of berths.
- the surface temperature is measured, for example, at the center of the rail head without contact using a pyrometer.
- the peripheral zone temperature determined here is then, depending on the type of cooling and intensity, approx. 30 to 60 ° C below the core temperature still present.
- the temperature of the rail head is during the entire thermal treatment, starting from the entry into the pre-cooling device until it leaves the finished cooling device measured.
- the measured values are fed into a measuring and control device and are used to control the individual process steps to be carried out, including the heating upstream of the final cooling.
- a pre-cooling device which allows a targeted cooling of the rail from the rolling heat to a core temperature of the rail head of 750 to 850 ° C
- a heating device directly upstream of the finished cooling device for example one or more induction coils which are traversed by the rail,
- a pre-cooling device for example a water cooling section, in which the rail is cooled with such a high heat flow density that the shortest possible t 8/5 time (cooling time of 800 to 500 ° C in the ZTU diagram) is achieved for the core zone.
- the cooling devices for pre- and finished cooling as well as the heating or heating device for intermediate heating are connected to a measuring and regulating device, into which the temperature measurements, in particular of the rail head, flow and which controls the entire thermal treatment accordingly, in order to set and maintain the desired temperatures or cooling and heating conditions.
- a schematic system for thermal treatment after the rolling process of an exemplary rail is shown below in schematic drawing figures.
- Fig. 2 shows a thermal treatment plant as a flow diagram.
- FIG. 1 the cross section of a rail 1 is shown.
- the rail 1 consists of profile parts of different masses, the rail head 2 with edge zone 5 and core zone 6, the middle part 3 and the rail foot 4.
- the edge zone 5 of the rail head 2 is shown in broken lines in FIG. 1; it is the area which is to be converted primarily by targeted thermal treatment into a fine-lamellar periite structure, without 5 bainite being formed during the thermal treatment in this peripheral zone or in this area.
- FIG. 2 shows a schematic system 10 for carrying out the thermal treatment according to the invention.
- the system 10 consists of a pre-cooling device 12, preferably an inductive heating device 13 and a pre-cooling device 14, which are arranged one after the other in the rolling line xx behind the last rolling stand 11, and which are passed through by the rail 1 after they exit the rolling stand 11.
- the control of the thermal treatment - comprising the intensity of the cooling or heating as well as the throughput speed through the individual system parts 12, 13, 14, is carried out as a function of the temperature measured in each case by a measuring and regulating device 15, which is connected via corresponding lines 16, 17, 18 for the Temperature measured values and the control signals are connected to the respective system parts 12, 13, 14.
- thermal treatment system can of course be varied as much as possible depending on the type and size of the rails and the type of pre-cooling and finishing cooling selected and the scope of the measuring and control device, provided that the process steps according to the invention arranged in succession are fully maintained.
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)
- Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10148305A DE10148305A1 (de) | 2001-09-29 | 2001-09-29 | Verfahren und Anlage zur thermischen Behandlung von Schienen |
| DE10148305 | 2001-09-29 | ||
| PCT/EP2002/010512 WO2003028912A2 (de) | 2001-09-29 | 2002-09-19 | Verfahren und anlage zur thermischen behandlung von schienen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1432835A2 true EP1432835A2 (de) | 2004-06-30 |
| EP1432835B1 EP1432835B1 (de) | 2005-06-08 |
Family
ID=7700912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02777151A Expired - Lifetime EP1432835B1 (de) | 2001-09-29 | 2002-09-19 | Verfahren zur thermischen behandlung von schienen |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US7416622B2 (de) |
| EP (1) | EP1432835B1 (de) |
| JP (1) | JP4317749B2 (de) |
| CN (1) | CN1263873C (de) |
| AT (1) | ATE297474T1 (de) |
| AU (1) | AU2002338735A1 (de) |
| DE (2) | DE10148305A1 (de) |
| ES (1) | ES2243768T3 (de) |
| RU (1) | RU2272080C2 (de) |
| WO (1) | WO2003028912A2 (de) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006030699B4 (de) * | 2006-06-30 | 2014-10-02 | Daimler Ag | Gegossener Stahlkolben für Verbrennungsmotoren |
| CN100482812C (zh) * | 2006-09-12 | 2009-04-29 | 攀枝花钢铁(集团)公司 | 钢轨热处理方法及钢轨热处理机组 |
| ITMI20072244A1 (it) * | 2007-11-28 | 2009-05-29 | Danieli Off Mecc | Dispositivo per trattamento termico di rotaie e relativo processo |
| WO2010050238A1 (ja) * | 2008-10-31 | 2010-05-06 | 新日本製鐵株式会社 | 耐摩耗性および靭性に優れたパーライト系レール |
| AU2010216990B2 (en) * | 2009-02-18 | 2015-08-20 | Nippon Steel Corporation | Pearlitic rail with excellent wear resistance and toughness |
| US8747576B2 (en) | 2009-06-26 | 2014-06-10 | Nippon Steel & Sumitomo Metal Corporation | Pearlite-based high carbon steel rail having excellent ductility and process for production thereof |
| RU2418077C1 (ru) * | 2010-04-07 | 2011-05-10 | Открытое Акционерное Общество "Российские Железные Дороги" | Способ термической обработки рельсов |
| WO2011153530A2 (en) * | 2010-06-04 | 2011-12-08 | Csx Transportation | Process and apparatus for rail restoration and rail manufacture using welding |
| RU2447163C1 (ru) | 2010-08-10 | 2012-04-10 | Общество С Ограниченной Ответственностью "Исследовательско-Технологический Центр "Аусферр" | Способ термической обработки изделий из сплавов на основе железа (варианты) |
| RU2487177C2 (ru) * | 2011-07-28 | 2013-07-10 | Общество С Ограниченной Ответственностью Научно-Производственное Предприятие "Томская Электронная Компания" | Способ и установка термической обработки рельсов |
| RU2484148C1 (ru) * | 2011-10-27 | 2013-06-10 | Общество С Ограниченной Ответственностью Научно-Производственное Предприятие "Томская Электронная Компания" | Способ и установка термической обработки рельсов |
| JP5686231B1 (ja) * | 2013-03-28 | 2015-03-18 | Jfeスチール株式会社 | レールの製造方法及び製造装置 |
| JP6311678B2 (ja) * | 2014-09-24 | 2018-04-18 | Jfeスチール株式会社 | レールの製造方法および製造装置 |
| US10286460B2 (en) | 2017-04-07 | 2019-05-14 | Robert J. Murphy | Single-pass, single-radial layer, circumferential-progression fill-welding system, apparatus and method for refurbishing railway and other transit rails |
| CN107520529B (zh) * | 2017-08-31 | 2019-10-11 | 攀钢集团研究院有限公司 | 136re+ss热处理钢轨移动闪光焊接的方法 |
| CN111558682B (zh) * | 2020-03-31 | 2024-10-22 | 中国铁道科学研究院集团有限公司金属及化学研究所 | 一种对称断面异型钢轨感应加热压制成型装置及质量监控系统 |
| CN113403466A (zh) * | 2021-05-20 | 2021-09-17 | 包头钢铁(集团)有限责任公司 | 一种消除钢轨脱碳层组织异常的生产方法 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US468788A (en) * | 1892-02-16 | Apparatus for cooling steel rails and bars | ||
| JPS54148124A (en) * | 1978-05-12 | 1979-11-20 | Nippon Steel Corp | Manufacture of high strength rall of excellent weldability |
| DE3006695C2 (de) | 1980-02-22 | 1988-12-01 | Klöckner-Werke AG, 4100 Duisburg | Verfahren zum Wärmebehandeln von Schienen |
| JPS57137425A (en) * | 1981-02-17 | 1982-08-25 | Nippon Steel Corp | Uniform cooling method for rail head part heated to high temperature |
| 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 (fr) * | 1982-10-11 | 1984-05-10 | Centre Rech Metallurgique | Procede perfectionne pour la fabrication de rails et rails obtenus par ce procede |
| DE3446794C1 (de) * | 1984-12-21 | 1986-01-02 | BWG Butzbacher Weichenbau GmbH, 6308 Butzbach | Verfahren zur Waermebehandlung perlitischer Schienenstaehle |
| JPH0730401B2 (ja) * | 1986-11-17 | 1995-04-05 | 日本鋼管株式会社 | 靭性の優れた高強度レ−ルの製造方法 |
| DE4237991A1 (de) | 1992-11-11 | 1994-05-19 | Schloemann Siemag Ag | Verfahren und Vorrichtung zur Abkühlung von warmgewalzten Profilen insbesondere von Schienen |
| 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 |
| AT402941B (de) * | 1994-07-19 | 1997-09-25 | Voest Alpine Schienen Gmbh | Verfahren und vorrichtung zur wärmebehandlung von profiliertem walzgut |
| JPH08252602A (ja) * | 1995-03-15 | 1996-10-01 | Nippon Steel Corp | 頭部内部疲労損傷性に優れた高強度レールの製造方法 |
| FR2738843B1 (fr) * | 1995-09-20 | 1997-10-17 | Sogerail | Procede de traitement thermique d'un rail en acier |
| AT407057B (de) * | 1996-12-19 | 2000-12-27 | Voest Alpine Schienen Gmbh | Profiliertes walzgut und verfahren zu dessen herstellung |
-
2001
- 2001-09-29 DE DE10148305A patent/DE10148305A1/de not_active Withdrawn
-
2002
- 2002-09-19 AU AU2002338735A patent/AU2002338735A1/en not_active Abandoned
- 2002-09-19 DE DE50203370T patent/DE50203370D1/de not_active Expired - Lifetime
- 2002-09-19 RU RU2004113116/02A patent/RU2272080C2/ru not_active IP Right Cessation
- 2002-09-19 ES ES02777151T patent/ES2243768T3/es not_active Expired - Lifetime
- 2002-09-19 WO PCT/EP2002/010512 patent/WO2003028912A2/de not_active Ceased
- 2002-09-19 US US10/489,130 patent/US7416622B2/en not_active Expired - Fee Related
- 2002-09-19 JP JP2003532222A patent/JP4317749B2/ja not_active Expired - Fee Related
- 2002-09-19 EP EP02777151A patent/EP1432835B1/de not_active Expired - Lifetime
- 2002-09-19 CN CNB028192184A patent/CN1263873C/zh not_active Expired - Fee Related
- 2002-09-19 AT AT02777151T patent/ATE297474T1/de active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03028912A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2002338735A1 (en) | 2003-04-14 |
| US7416622B2 (en) | 2008-08-26 |
| ATE297474T1 (de) | 2005-06-15 |
| JP2005504174A (ja) | 2005-02-10 |
| RU2004113116A (ru) | 2005-05-20 |
| ES2243768T3 (es) | 2005-12-01 |
| WO2003028912A3 (de) | 2003-09-12 |
| JP4317749B2 (ja) | 2009-08-19 |
| WO2003028912A2 (de) | 2003-04-10 |
| EP1432835B1 (de) | 2005-06-08 |
| RU2272080C2 (ru) | 2006-03-20 |
| DE10148305A1 (de) | 2003-04-24 |
| US20040231763A1 (en) | 2004-11-25 |
| CN1263873C (zh) | 2006-07-12 |
| DE50203370D1 (de) | 2005-07-14 |
| CN1561399A (zh) | 2005-01-05 |
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