EP1412543B1 - Verfahren zur kühlung von werkstücken insbesondere von profilwalzprodukten aus schienenstählen - Google Patents
Verfahren zur kühlung von werkstücken insbesondere von profilwalzprodukten aus schienenstählen Download PDFInfo
- Publication number
- EP1412543B1 EP1412543B1 EP02776916A EP02776916A EP1412543B1 EP 1412543 B1 EP1412543 B1 EP 1412543B1 EP 02776916 A EP02776916 A EP 02776916A EP 02776916 A EP02776916 A EP 02776916A EP 1412543 B1 EP1412543 B1 EP 1412543B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- temperature
- modules
- work piece
- rail
- 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.)
- Revoked
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 122
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 23
- 239000002826 coolant Substances 0.000 claims description 12
- 239000000498 cooling water Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000003303 reheating Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010583 slow cooling Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
- 229910001563 bainite Inorganic materials 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 235000019362 perlite Nutrition 0.000 description 4
- 239000010451 perlite Substances 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002123 temporal effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 230000002631 hypothermal effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- 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
- 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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
Definitions
- the invention relates to a method for cooling workpieces, in particular for the cooling of rolled products and here of rolled profile products from rail steels with a fine perlitic or ferritic / pearlitic structure, wherein the warm workpiece, i. Workpiece with austenitic structure, through a Cooling section with an inlet and an outlet area out and a cooling process is subjected to a conversion into a pearlitic or undergoes ferritic / pearlitic structure.
- Rail steels are used essentially for the production of rails and their Connecting or fastening elements.
- the over the wheel to the rail acting vertical and lateral forces such as normal, guidance, acceleration and braking forces lead to the immediate impact area very high dynamic loads and usually a plastic one Deformation of the steel.
- These stresses cause signs of wear in the form of Materialabschiebungen, abrasion, material outbreaks, local Material fatigue or cracks.
- An improvement in the resistance of a Rail against signs of wear can be increased by increasing its yield strength and tensile strength as well as their fatigue strength in connection with a be achieved as fine-grained pearlitic structure.
- rail steels Under normal cooling conditions on a prior art cooling bed, rail steels undergo transformation into a pearlitic structure.
- rail steels with a ferritic-pearlitic structure have tensile strengths in a range of 700 to 900 N / mm 2 , while steels with purely pearlitic structure achieve tensile strength values of more than 900 N / mm 2 .
- the essential properties of rail steels are determined by the proportion of the structure of ferrite / perlite and by their morphological formation. In the case of ferritic / pearlitic as well as perlitic steels, the lamella distance plays a role.
- EP 0 725 152 A1 discloses a method and a device for cooling known from hot-rolled rail profiles. With the help of a computer system a cooling power adapted to the profile geometry is calculated, in particular considers the geometry of the rail head in relation to the foot becomes. The cooling then takes place in such a way that the transformation of the microstructure in the Head and foot in ferrite and / or perlite with the least possible time lag, to prevent distortion of the rail.
- US-A-4 486 248 also relates to the cooling of rail profiles.
- the rail head is substantially cooled.
- Intermediate zones is reheated by the residual heat held in the rail foot.
- a target structure is pearlitic microstructure with a low Volume fraction of bainite can be adjusted.
- US Pat. No. 4,638,851 relates to the cooling of a metal strip, for example in continuous belt annealing or strip galvanizing.
- the invention has the object to provide adeverfähren to Production of workpieces, in particular profile rolling products, from rail steel, with improved mechanical properties and a fine-grained pearlite or ferrite / pearlite structure.
- the workpiece for example a Rolled or optionally extruded product, coming from the (rolling) heat, by a Cooling section
- a Cooling section is guided, resulting from individual independent cooling modules with independently adjustabledeparametem composed, whereby between the Cooling modules Intermediate areas for thermal compensation or thermal Relaxation is available with means for actual temperature determination of the respective Workpiece in these intermediate areas, and depending on the respective actual temperature values of one or each intermediate area the specific cooling parameters, in particular.
- the cooling intensity at least of each following cooling module for setting a defined (ObeT inhabit-) Temperature of the workpiece during the entire run of the cooling section be regulated, the defined temperature of the workpiece each above a critical temperature at which bainitic microstructures form.
- the basic idea is thus a regulation of the cooling of a workpiece Rail steel in a cooling section under the proviso that the surface temperature of the workpiece is cooled from a rail steel so that the set desired pearlitic or ferritic / pearlitic microstructure, wherein by Go through relaxation phases and a constant check of the
- Temperature conditions in preferably each intermediate area and possibly regulation the cooling parameter of the individual cooling modules ensures that the temperature not a critical temperature falls below and thus the hypothermia is not so high that a Bainitumwandlung takes place and thus undesirable form bainitic microstructure shares.
- the cooling process is a function of the continuous cooling modules individual cooling process steps and depending on the passing intermediate areas for structural relaxation from temporal phases of reheating and / or from temporal phases of the thermal holding and / or from temporal Phases of a slow cooling together.
- the workpiece in all intermediate areas an equal or in different intermediate areas go through different periods of relaxation.
- the reheating this happens either by the inside of the workpiece remaining heat and / or external heat supply.
- To this Way is set in a roughly sawtooth cooling, which is favorable on the self-adjusting final structure and thus the mechanical properties effect.
- the bainite formation is counteracted by the parameters of Cooling distance can be adjusted so that at no time during the cooling process can use bainit formation.
- the specific cooling parameters the subsequent cooling zone and at the same time the cooling parameters of the previous Cooling module regulated.
- a workpiece or rolled product provided it is from a given setpoint temperature that makes it a given Date or in an intermediate area, deviates, by a specific change of the cooling parameters in the subsequent cooling module again adjusted to the target temperature and at the same time for subsequent Workpieces the previous cooling module is adjusted.
- the surface temperature of the workpiece is at the end of the intermediate region, i.e. after the end of the area for structural relaxation, measured.
- the temperature measurement in the intermediate areas can also be used for quality control be used.
- the surface temperature measurement takes place by means of an optical and non-contact measurement, i. by means of a pyrometer.
- the regulation of the cooling parameters and in particular the cooling intensity takes place preferably by regulating the pressure with which the cooling medium to the surface of the workpiece, and / or by means of regulated adjustment of the temperature the cooling medium and / or by means of regulated adjustment of the volume flow the cooling medium by selecting the cooling nozzle geometry.
- a cooling medium Preferably, cooling water comes into question.
- the pressure control is preferably carried out by a pressure control valve in the supply line to the nozzles, which are arranged on cooling bars.
- the cooling intensity is too by controlling a different number of nozzles per chilled beam or Chilled beam arrangements possible.
- the cooling medium i. especially the Cooling water, preheated so far before occurrence on the workpiece surface, that a drop below the Leidenfrosttemperatur not or only very late.
- the non-wetting behavior becomes one Liquid understood when the temperature of the body touched above the Boiling temperature of the liquid is.
- water is replaced by a Gas skin from evaporated water protected from further evaporation and loses the cooling effect for a certain time. Due to the cooling water supply temperature the suffering frost temperature can be affected.
- the Leidenfrost temperature increases with higher cooling water inlet temperature, and cooling is getting weaker. Thus a fall below the Leidenfrosttemperatur not or only very late, it is proposed to preheat the cooling water. This offers the advantage that the cooling is weaker and thus more reproducible.
- the temperature of the workpiece measured before entering or entering the cooling section and this temperature value to presetting the cooling parameters used to preset the Cooling parameters of the individual cooling modules, in particular the setting of Pressure, with which the cooling medium impinges on the workpiece surface to reach.
- the cooling section 1 shown in FIG. 1 adjoins a profile rolling section (not shown), for example to a rolling line for rail profiles made of rail steels, at.
- the cooling section 1 is set in the embodiment shown five cooling modules 2a-e together, but not on this number of cooling modules limited.
- the individual cooling modules 2a-e are constructed, for example, that they comprise one or more cooling bars or cooling nozzle arrangements.
- the pressure at which the cooling water escapes from the individual nozzles is above a pressure control valve 3a-e adjustable.
- the current pressure is measured by the pressure gauges 4a-e measured.
- Between the individual cooling modules 2a-e are intermediate areas 5a-e arranged.
- Each at the end of an intermediate region 5a-e is a pyrometer 6a-e for non-contact optical measurement of the surface temperature of the rolled product located in this intermediate region, where in a rail profile, the surface temperature at the rail head is measured.
- an additional pyrometer 6f is arranged before the first cooling module 2a at the beginning or inlet region (12) of the cooling path 1.
- the individual pyrometers 6a-f are connected via signal lines 7a-g to a computer unit 8.
- the computer unit 8 is via corresponding control lines 9a e to change the individual Control valves 3a-e connected to the coolant nozzles.
- the cooling medium in particular Cooling water (KW)
- KW Cooling water
- For the adjustment of the Pressure values is also a control loop of the pressure gauges 4a-e with the computer unit 8 provided (signal lines 11a-e).
- a current surface temperature value is recorded by means of the first pyrometer 6f, for example a two-color pyrometer.
- This first surface temperature value is forwarded to the computer unit 8, which already causes a preset (presetting) of the individual control valves for adjusting the cooling water pressure and the cooling water temperature as a function of this individual value.
- the rail profile After passing through the first cooling module 2a and the first cooling step, the rail profile enters the first intermediate region 5a, in which a relaxation phase for the microstructure takes place.
- a further surface temperature measurement is carried out by means of a second pyrometer 6a, for example a two-color pyrometer.
- This recorded actual value is transferred via the signal lines 7a and 7g to the computer unit 8 and there carried out a difference calculation between a setpoint (T setpoint) and the actual value (T actual ).
- T setpoint a setpoint
- T actual the actual value
- the target value is always above a material-specific temperature at which bainite formation can occur.
- the setpoints are alloy-specific and can be determined from experiments.
- a guideline for this critical temperature which should not be undercut in a cooling process for rail steels, is about 450-500 ° C.
- FIGS. 2 and 3 show the cooling curves with the aid of temperature-time diagrams a rail head made of a material with 0.8% carbon with Regulation and without regulation.
- the designation C80W60 or C80W65 makes clearly that the cooling rate in the core of the rail head (example Rail form according to AREA 136 [delivery specification of American railway Engineering Association]) is less high than in the peripheral areas and thereby in the Kem Kunststoff the conversion of austenite in perlite or ferrite perlite at higher Temperatures takes place.
- the temperature over time is at five different measuring points determined on the rail head.
- 1 is a measuring point in the core of the rail head, 2, a measuring point located 5 mm below the surface, 3 a Measuring point, which is located 5 mm below the side surface, 4 a measuring point on the side surface and 5 a measuring point on the head surface. It is obvious that at no time at any measuring point the structure of the rail head undergoes cooling such a subcooling that bainite in the structure can form.
- the simulated cooling section can be individually controlled with five modules.
- the individual cooling curves in Fig. 2 show that never a critical temperature at which Bainit Bear would fall below.
- the sawtooth Cooling process with a reheating in the intermediate or compensation zones clear.
- Fig. 3 shows in comparison a cooling section with five cooling modules, not individually are controllable, so that it falls below the Bainittemperatur in the near-surface areas (curves 4 and 5) of the rail head comes.
- the proposed method is achieved that in the cooling of Rail steels from the rolling heat a fine perlitic or ferritic / pearlitic Structure without the mechanical properties, in particular the wear resistance, Negatively affecting Bainitanteile can be adjusted.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Control Of Heat Treatment Processes (AREA)
- Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
- Fig. 1
- eine schematische Übersicht über eine Kühlstrecke, in der das erfindungsgemäße Verfahren durchgeführt wird;
- Fig. 2
- ein Temperatur-Zeit-Diagramm mit den Abkühlkurven von fünf Meßpunkten in bzw. am Schienenkopf eines üblichen Schienenstahls mit etwa 0,8%C und 1,0% Mn, der in einer Kühlstrecke verfahrensgemäß einem solchen Kühlverlauf unterworfen wird, daß die Bainittemperatur nicht unterschritten wird;
- Fig. 3
- zum Vergleich ein Temperatur-Zeit-Diagramm der fünf Abkühlkurven eines ungeregelten Abkühlverlaufs mit einer Unterschreitung der Bainittemperatur.
Claims (8)
- Verfahren zur Kühlung von Werkstücken, insbesondere Profilwalzprodukten, aus Schienenstählen mit einem feinperlitischen oder ferritisch/perlitischen Gefüge,
wobei das warme Werkstück durch eine Kühlstrecke (1) mit einem Eintritts- (12) und einem Austrittsbereich geführt und einem Abkühlprozeß unterworfen wird und hierbei eine Umwandlung in ein perlitisches oder ferritisch/perlitisches Gefüge durchmacht, wobei
das Werkstück durch die Kühlstrecke, die sich aus einzelnen unabhängigen, über die Länge der Kühlstrecke hintereinander angeordneten Kühlmodulen (2a-e) mit unabhängig einstellbaren Kühlparametem zusammensetzt, geführt wird,
wobei zwischen den Kühlmodulen (2a-e) Zwischenbereiche (5a-e) zur Gefügeentspannung vorhanden sind mit Mitteln zur Ist-Temperaturbestimmung (TIST) des jeweiligen Werkstückes in diesen Zwischenbereichen (5a-e), und
wobei in Abhängigkeit der jeweiligen Ist-Temperaturwerte (TIST) des Werkstückes in einem Zwischenbereich (5a-e) die spezifischen Kühlparameter, insbesondere die Kühlintensität, mindestens des jeweils nachfolgenden Kühlmoduls (2b-e) zur Gewährleistung einer definierten Temperatur des Werkstückes während des gesamten Durchlaufs der Kühlstrecke (1) geregelt werden, wobei die definierte Temperatur (TSOLL) des Werkstückes jeweils oberhalb einer kritischen Temperatur, bei der sich bainitische Gefügeanteile bilden, liegt. - Verfahren zur Kühlung nach Anspruch 1,
dadurch gekennzeichnet, daß der Abkühlprozeß sich in Abhängigkeit der durchlaufenden Kühlmodule in einzelne Abkühlprozeßschritte und in Abhängigkeit der durchlaufenden Zwischenbereiche zur Gefügeentspannung in zeitliche Phasen der Wiederaufwärmung und/oder in zeitliche Phasen des thermischen Haltens und/oder in zeitliche Phasen einer langsamen Abkühlung zusammensetzt. - Verfahren zur Kühlung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß in Abhängigkeit des jeweiligen gemessenen Ist-Temperaturwerte (TIST) eines oder eines jeden Zwischenbereichs (5a-e) die spezifischen Kühlparameter des jeweils nachfolgenden Kühlmoduls (2b-e) und gleichzeitig die Kühlparameter des vorherigen Kühlmoduls (2a-d) geregelt werden. - Verfahren zur Kühlung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Oberflächentemperatur des Werkstücks am Ende des Zwischenbereichs (5a-e) gemessen wird. - Verfahren zur Kühlung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Ist-Temperaturmessung (TIST) mittels einer optischen und berührungslosen Messung vorgenommen wird. - Verfahren zur Kühlung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Regelung der Kühlparameter, insbesondere der Kühlintensität, mittels Druckregelung und/oder Temperaturregelung des Kühlmediums erreicht wird. - Verfahren zur Kühlung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß das Kühlmedium, insbesondere Kühlwasser, vor Auftritt auf die Werkstückoberfläche soweit vorgewärmt wird, daß eine Unterschreitung der Leidenfrosttemperatur nicht oder später als bei nicht vorgewärmten Kühlmedium erfolgt. - Verfahren zur Kühlung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die Temperatur des Werkstücks vor Eintritt oder beim Eintritt in die Kühlstrecke (1) gemessen wird und dieser Temperaturwert zum Presetting der Kühlparameter der einzelnen Kühlmodule verwendet wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10137596 | 2001-08-01 | ||
DE10137596A DE10137596A1 (de) | 2001-08-01 | 2001-08-01 | Verfahren zur Kühlung von Werkstücken, insbesondere von Profilwalzprodukten, aus Schienenstählen |
PCT/EP2002/008271 WO2003012151A1 (de) | 2001-08-01 | 2002-07-25 | Verfahren zur kühlung von werkstücken insbesondere von profilwalzprodukten aus schienenstählen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1412543A1 EP1412543A1 (de) | 2004-04-28 |
EP1412543B1 true EP1412543B1 (de) | 2005-02-02 |
Family
ID=7693931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02776916A Revoked EP1412543B1 (de) | 2001-08-01 | 2002-07-25 | Verfahren zur kühlung von werkstücken insbesondere von profilwalzprodukten aus schienenstählen |
Country Status (10)
Country | Link |
---|---|
US (2) | US20040187974A1 (de) |
EP (1) | EP1412543B1 (de) |
JP (1) | JP4174423B2 (de) |
KR (1) | KR100583301B1 (de) |
CN (1) | CN1232661C (de) |
AT (1) | ATE288503T1 (de) |
DE (2) | DE10137596A1 (de) |
ES (1) | ES2236592T3 (de) |
RU (1) | RU2266966C2 (de) |
WO (1) | WO2003012151A1 (de) |
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DE102021212523A1 (de) | 2021-05-31 | 2022-12-01 | Sms Group Gmbh | Forcierte Luftkühlung zur Kühlung von Langstahlerzeugnissen |
WO2022253489A1 (de) | 2021-05-31 | 2022-12-08 | Sms Group Gmbh | Forcierte luftkühlung zur kühlung von langstahlerzeugnissen |
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DE10137596A1 (de) * | 2001-08-01 | 2003-02-13 | Sms Demag Ag | Verfahren zur Kühlung von Werkstücken, insbesondere von Profilwalzprodukten, aus Schienenstählen |
DE102007009937A1 (de) * | 2007-03-01 | 2008-09-04 | Schuler Smg Gmbh & Co. Kg | Verfahren zur Umformung einer Platine und Kühlvorrichtung für eine Platine |
ITMI20072244A1 (it) | 2007-11-28 | 2009-05-29 | Danieli Off Mecc | Dispositivo per trattamento termico di rotaie e relativo processo |
RU2470080C1 (ru) * | 2009-03-27 | 2012-12-20 | Ниппон Стил Корпорейшн | Устройство и способ охлаждения зоны сварки рельса |
ITLI20090004A1 (it) * | 2009-05-21 | 2010-11-22 | Lucchini S P A | Rotaie altoresistenziali a morfologia perlitica coloniale con elevato rapporto tenacita'-resistenza a rottura ed omogeneita' di proprieta' meccaniche e tecnologiche e relativo processo di fabbricazione. |
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) |
DE102010049020B4 (de) * | 2010-10-21 | 2015-02-19 | Cmi M+W Engineering Gmbh | Vorrichtung zum Kühlen von auf einer Förderstrecke geförderten Metallbändern oder -blechen |
RU2456352C1 (ru) | 2010-11-11 | 2012-07-20 | Общество С Ограниченной Ответственностью Научно-Производственное Предприятие "Томская Электронная Компания" | Способ и устройство 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 |
JP5429434B1 (ja) * | 2012-02-06 | 2014-02-26 | Jfeスチール株式会社 | レールの冷却方法 |
EP2644719A1 (de) | 2012-03-28 | 2013-10-02 | Siemens Aktiengesellschaft | Steuerung einer Kühlung |
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EP2674504A1 (de) | 2012-06-11 | 2013-12-18 | Siemens S.p.A. | Verfahren und System zur Wärmebehandlung von Schienen |
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CN103898303B (zh) * | 2012-12-31 | 2016-06-08 | 攀钢集团攀枝花钢铁研究院有限公司 | 一种道岔轨的热处理方法和道岔轨 |
FR3017880B1 (fr) * | 2014-02-21 | 2018-07-20 | Compagnie Generale Des Etablissements Michelin | Procede de traitement thermique a refroidissement continu d'un element de renfort en acier pour pneumatique |
CN109852782B (zh) * | 2019-01-09 | 2020-06-16 | 邯郸钢铁集团有限责任公司 | 消除r350lht钢轨热处理黑斑的方法 |
DE102020205252A1 (de) * | 2020-04-24 | 2021-10-28 | Kocks Technik Gmbh & Co Kg | Vorrichtung zum Kühlen von Langprodukten und Verfahren zum Kühlen eines Langproduktes unter Verwendung derselben |
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DE1013759B (de) | 1955-12-30 | 1957-08-14 | Siemens Ag | Schutzschaltung fuer elektrische Mittel- oder Niederspannungsverteilungsanlagen |
US4243441A (en) * | 1979-05-09 | 1981-01-06 | National Steel Corporation | Method for metal strip temperature control |
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 |
JPS60221533A (ja) * | 1984-04-17 | 1985-11-06 | Mitsubishi Heavy Ind Ltd | 金属ストリツプの冷却装置 |
DE3579681D1 (de) * | 1984-12-24 | 1990-10-18 | Nippon Steel Corp | Verfahren und vorrichtung zum waermebehandeln von schienen. |
US4938460A (en) * | 1987-03-19 | 1990-07-03 | Chemetron-Railway Products, Inc. | Apparatus for air quenching railway heads |
US4886558A (en) * | 1987-05-28 | 1989-12-12 | Nkk Corporation | Method for heat-treating steel rail head |
DE19503747A1 (de) * | 1995-02-04 | 1996-08-08 | Schloemann Siemag Ag | Verfahren und Vorrichtung zum Abkühlen von warmgewalzten Profilen |
US6689230B1 (en) * | 1995-02-04 | 2004-02-10 | Sms Schloemann-Siemag Aktiengesellschaft | Method and apparatus for cooling hot-rolled sections |
DE19850253A1 (de) * | 1998-10-31 | 2000-05-04 | Schloemann Siemag Ag | Verfahren und System zur Regelung von Kühlstrecken |
DE10137596A1 (de) | 2001-08-01 | 2003-02-13 | Sms Demag Ag | Verfahren zur Kühlung von Werkstücken, insbesondere von Profilwalzprodukten, aus Schienenstählen |
-
2001
- 2001-08-01 DE DE10137596A patent/DE10137596A1/de not_active Withdrawn
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2002
- 2002-07-25 DE DE50202183T patent/DE50202183D1/de not_active Revoked
- 2002-07-25 CN CNB028151186A patent/CN1232661C/zh not_active Expired - Fee Related
- 2002-07-25 EP EP02776916A patent/EP1412543B1/de not_active Revoked
- 2002-07-25 WO PCT/EP2002/008271 patent/WO2003012151A1/de active IP Right Grant
- 2002-07-25 ES ES02776916T patent/ES2236592T3/es not_active Expired - Lifetime
- 2002-07-25 KR KR1020047000443A patent/KR100583301B1/ko active IP Right Grant
- 2002-07-25 US US10/485,286 patent/US20040187974A1/en not_active Abandoned
- 2002-07-25 AT AT02776916T patent/ATE288503T1/de active
- 2002-07-25 RU RU2004105954/02A patent/RU2266966C2/ru not_active IP Right Cessation
- 2002-07-25 JP JP2003517324A patent/JP4174423B2/ja not_active Expired - Fee Related
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2007
- 2007-07-23 US US11/880,635 patent/US7854883B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021212523A1 (de) | 2021-05-31 | 2022-12-01 | Sms Group Gmbh | Forcierte Luftkühlung zur Kühlung von Langstahlerzeugnissen |
WO2022253489A1 (de) | 2021-05-31 | 2022-12-08 | Sms Group Gmbh | Forcierte luftkühlung zur kühlung von langstahlerzeugnissen |
Also Published As
Publication number | Publication date |
---|---|
KR20040015347A (ko) | 2004-02-18 |
CN1537175A (zh) | 2004-10-13 |
RU2004105954A (ru) | 2005-03-27 |
WO2003012151A1 (de) | 2003-02-13 |
DE50202183D1 (de) | 2005-03-10 |
ES2236592T3 (es) | 2005-07-16 |
KR100583301B1 (ko) | 2006-05-25 |
JP4174423B2 (ja) | 2008-10-29 |
US20080018027A1 (en) | 2008-01-24 |
US20100207305A9 (en) | 2010-08-19 |
DE10137596A1 (de) | 2003-02-13 |
EP1412543A1 (de) | 2004-04-28 |
RU2266966C2 (ru) | 2005-12-27 |
JP2004537649A (ja) | 2004-12-16 |
US20040187974A1 (en) | 2004-09-30 |
US7854883B2 (en) | 2010-12-21 |
ATE288503T1 (de) | 2005-02-15 |
CN1232661C (zh) | 2005-12-21 |
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