EP4348148A1 - Refroidissement forcé par circulation d'air pour refroidir des produits longs en acier - Google Patents

Refroidissement forcé par circulation d'air pour refroidir des produits longs en acier

Info

Publication number
EP4348148A1
EP4348148A1 EP22725191.5A EP22725191A EP4348148A1 EP 4348148 A1 EP4348148 A1 EP 4348148A1 EP 22725191 A EP22725191 A EP 22725191A EP 4348148 A1 EP4348148 A1 EP 4348148A1
Authority
EP
European Patent Office
Prior art keywords
heat treatment
long steel
chamber
treatment unit
cross
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.)
Pending
Application number
EP22725191.5A
Other languages
German (de)
English (en)
Inventor
Ran YANG
Jens Oestrich
Frank Steden
Dirk Winterfeldt
Olaf Koch
Hans-Peter Drügh
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.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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
Priority claimed from DE102021212523.9A external-priority patent/DE102021212523A1/de
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4348148A1 publication Critical patent/EP4348148A1/fr
Pending 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
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • 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
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/008—Martensite
    • 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

Definitions

  • the present invention relates to a heat treatment unit, in particular a cooling hood, a device and a method for the heat treatment of hot-rolled long steel products.
  • cooling media In order to set the mechanical properties, such as in particular the yield point, the tensile strength or the hardness, of hot-rolled long steel products, these are cooled in a targeted manner by means of cooling devices during and/or after a hot-rolling process.
  • water or a water-air mixture is generally used as the cooling medium in the prior art, as is disclosed, for example, in EP 1 412 543 B1.
  • such cooling media lead to the development of the so-called Leidenfrost phenomenon, which leads to deviations in the cooling rate over the entire length of the long steel product and thus to the formation of inhomogeneous microstructures.
  • a method and a device for hardening a rail head by means of air or nitrogen is also known from US Pat. No. 4,913,747.
  • the coolant is fed via a line system to a collector that includes a large number of nozzles.
  • a disadvantage of this embodiment variant is the complex construction of the cooling apparatus with the many nozzles and bores.
  • the object of the present invention is therefore to provide a device that is improved compared to the prior art and a method for the heat treatment of hot-rolled long steel products that is improved compared to the prior art. Description of the invention
  • the object is achieved by a heat treatment unit having the features of patent claim 1, by a device having the features of patent claim 9 and by a method having the features of patent claim 12.
  • the present invention relates to a heat treatment unit, in particular a cooling hood, preferably for use in a device for the heat treatment of hot-rolled long steel products, comprising a chamber with an inlet opening, via which a gaseous cooling medium can be fed to the chamber, and a gap-shaped outlet opening, via which the gaseous cooling medium can be carried out in an accelerated manner, the chamber comprising a middle chamber segment and a first and second outer chamber segment extending from the middle chamber segment and both outer chamber segments having a cross section which tapers proportionally towards their distal ends.
  • the construction of the heat treatment unit according to the invention in particular the proportional reduction of the flow cross section over the length of the respective outer chamber segment, enables a uniform flow of the gaseous cooling medium, such as air or nitrogen, at the gap-shaped outlet opening over the entire length of the chamber.
  • the gaseous cooling medium such as air or nitrogen
  • the hot-rolled long steel products can be cooled homogeneously and evenly, so that their mechanical properties are improved.
  • the outlet opening is designed in the form of a slit, the maintenance effort is also lower in contrast to conventional conical or flat jet nozzles.
  • cross section means a cross-sectional area
  • long steel product is understood to mean a metallic product which can have a length of up to 200 m, such as rails, in particular railway rails, H-shaped beams, U-shaped profiles, angles, etc.
  • the middle chamber segment advantageously has a constant cross-section along a longitudinal axis of the chamber, it being preferably provided in this connection that the inlet opening is arranged in the middle chamber segment.
  • the inlet opening can have an inlet cross section that is smaller than the cross section of the central chamber segment. Due to the larger cross section in the central chamber segment, the cooling medium flowing into the chamber through the inlet opening can first calm down before it flows further in the direction of the gap-shaped outlet opening. In addition, due to the inlet cross-section, which is larger than that of the slot-shaped outlet opening, the flow velocity of the cooling medium at the inlet of the chamber is kept very low and high at the outlet.
  • the turbulence is significantly reduced as a result of the change in cross section and the associated change in flow speed, so that it can be ensured that the cooling medium flows out very evenly over the entire length of the slot-shaped outlet opening.
  • the factor of Velocity change between inlet and outlet of the chamber can preferably be 3 to 20.
  • the flow velocity at the inlet can be 10 to 50 m/s.
  • the flow rate of the cooling medium at the outlet can then be 3 to 20 times this, depending on the selected cross-sectional ratios.
  • the cross sections arranged at the distal ends of the two outer chamber segments are smaller by a factor of at least 3, preferably at least a factor of 4, even more preferably at least a factor of 10 compared to the cross section of the central chamber segment.
  • each of the chamber segments advantageously has a cross-sectional section which tapers conically in the direction of the slot-shaped outlet opening and which can be embodied symmetrically or alternatively also asymmetrically.
  • the inlet opening can be formed directly in the middle chamber segment in the form of an opening.
  • the heat treatment unit comprises an inlet connection which is arranged in the inlet opening and is formed from a cup-shaped body and has an opening in each case aligned with the outer chamber segments.
  • each of the two openings has a cross section that corresponds at least to half the inlet cross section. This also prevents the formation of turbulence within the chamber and thus has an advantageous effect on the flow properties.
  • the bottom of the cup-shaped inlet connection ensures that the cooling medium flowing into the middle chamber segment flows into the two outer ones
  • Chamber segments is deflected and thus can not exit directly through the slit-shaped outlet opening of the middle chamber segment.
  • the pressure above the slit-shaped outlet opening can be kept constant over the entire length of the chamber.
  • the cross section of the slot-shaped exit opening is designed to be adjustable.
  • the cooling rate for the hot-rolled long steel product can be continuously controlled by adjusting the cross section of the slit-shaped outlet.
  • the slit-shaped outlet can be adjusted in the range of 0.5 to 50 mm depending on the required cooling width.
  • the present invention relates to a device for the heat treatment of hot-rolled long steel products, comprising a receiving device for receiving the hot-rolled long steel product and at least one heat treatment unit according to the invention, via which the long steel product to be cooled can be subjected to a gaseous cooling medium, in particular air or nitrogen.
  • a gaseous cooling medium in particular air or nitrogen.
  • ambient air can be supplied to the heat treatment unit as a cooling medium by means of a suitable blower device. Due to the narrowing of the cross section at the gap-shaped outlet opening, the cooling medium is accelerated through the latter in such a way that the cooling medium acts on the surface of the hot-rolled long steel product to be cooled at a high speed, which can be, for example, 200 m/s.
  • the device also comprises at least one fan device, via which a gaseous cooling medium, such as air or nitrogen, can be supplied to the heat treatment unit.
  • a gaseous cooling medium such as air or nitrogen
  • speed-controlled fan device a continuous adjustment of the cooling rate, which can be, for example, 1 to 20 K / s.
  • the at least one heat treatment unit is advantageously arranged in the device in such a way that the slit-shaped outlet opening is positioned longitudinally parallel to the receiving device.
  • the distance between the gap-shaped outlet opening and the receiving device is adjustable, particularly preferably such that the distance between the outlet opening and the surface of the long steel product to be cooled is 5 to 300 mm.
  • the device for heat treatment is of modular design, so that one or more heat treatment unit(s) can be moved around a length segment of the long steel product and/or one or more
  • Heat treatment unit (s) can be arranged along several length segments or along the entire length of the long steel product or are.
  • the device therefore advantageously comprises at least one temperature sensor via which the temperature of the long steel product, preferably during a
  • the temperature sensor is preferably a pyrometer or a thermal imaging camera. Other temperature sensors known to a person skilled in the art at the time of the application can also be used advantageously.
  • Another advantage of the modular design is its usability. Different workpiece geometries can be cooled by using a plurality of heat treatment units. An individual adaptation to the shape and the required cooling capacity is possible by changing the number and redesigning the heat treatment unit or the cooling hood.
  • structural changes in the long steel product can be detected and monitored directly in the cooling process using electromagnetic sensors.
  • the cooling rate can be adjusted accordingly based on the determined microstructure.
  • the cooling rate can be set reliably and stably and offers the flexibility to flexibly adjust the necessary cooling rates for the heat treatment process for all common and also special material compositions; -
  • the use of ambient air as a cooling medium is particularly resource-saving compared to the liquid cooling media currently used, such as water, oil and / or water-air mixtures; by using a blower device, such as a fan, a large volume of air can be transported at a low pressure, preferably up to 1320 mbar, so that no compressor is required.
  • the present invention also relates to a method for the heat treatment of a hot-rolled long steel product, with this product being fed directly to a device according to the invention and heat-treated following a hot-rolling process.
  • the gaseous cooling medium in particular air or nitrogen, can be used depending on the desired cooling intensity a speed of at least 25 m/s, preferably at a speed of at least 50 m/s, more preferably at a speed of at least 100 m/s, even more preferably at one
  • the present invention relates to the use of the heat treatment unit according to the invention or the device according to the invention for forming a pearlitic, a ferritic, a bainitic and/or a martensitic microstructure in a hot-rolled
  • FIG. 1 shows an embodiment variant of the heat treatment unit according to the invention in a perspective view
  • FIG. 2 shows the embodiment variant of the heat treatment unit shown in FIG. 1 in a side view
  • 3 shows a sectional view through the heat treatment unit shown in the previous figures
  • FIG. 4 shows an embodiment variant of the inlet connection in a perspective representation
  • FIG. 5 shows an embodiment variant of the device according to the invention for the heat treatment of long steel products
  • FIG. 7 shows a photograph of a rail head together with the hardness values determined without heat treatment
  • FIG. 8 shows a photograph of a rail head together with determined hardness values with a heat treatment according to the invention
  • FIGS. 1 to 4 show an embodiment variant of the heat treatment unit 1 according to the invention, which is suitable and intended for a device 2 for the heat treatment of hot-rolled long steel products (see FIG. 5), such as rails 3 .
  • the heat treatment unit 1 in particular a cooling hood, comprises a longitudinally extending chamber 4 with an inlet opening 5, via which a gaseous cooling medium, such as in particular ambient air, can be supplied to the chamber 4, as well as a slot-shaped outlet opening 6 extending longitudinally over the entire length of the chamber 4, over which the gaseous cooling medium can be executed in an accelerated manner.
  • a gaseous cooling medium such as in particular ambient air
  • the ambient air can preferably be sucked in via a blower device (not shown), such as a fan, and fed to the cooling hood 1 via a corresponding line system (not shown).
  • a blower device such as a fan
  • the distance between the cooling hood 1 and the fan device should be as short as possible.
  • the cooling hood 1 is formed by a middle chamber segment 7, which includes the inlet opening 5, and a first and a second outer chamber segment 8, 9, which each extend from the middle chamber segment 7 and are connected to it via flange connections 10, 11.
  • the middle chamber segment 7 is designed in such a way that it has a cross section of the same size along the longitudinal axis of the chamber 4, which is illustrated here with the reference number 12 in the sectional view shown in Figure 3.
  • the two outer chamber segments 8, 9 have one their distal ends proportionally tapering cross section, which results in a value in the range of 2 to 6 times smaller in the cross section 13 at each of the distal ends of the outer chamber segments 8, 9.
  • each of the chamber segments 7 , 8 , 9 in addition to a quadrangular cross-sectional section 14 , also has a cross-sectional section 15 that tapers conically in the direction of the slot-shaped outlet opening 6 .
  • the cooling hood 1 in the embodiment variant shown here comprises an inlet connection 16 arranged in the inlet opening 5.
  • this is formed from a cup-shaped body 17 which comprises a bottom 18 and a cylindrical wall 19 and whose inlet connection opening 20 is the inlet for the gaseous forms cooling medium.
  • the gaseous cooling medium can flow through the entire chamber 4
  • at least two openings 21 are provided in the cylindrical wall 19, which are each aligned with the outer chamber segments 8, 9.
  • Each of the two openings 21 predominantly has a cross section which corresponds to half the cross section of the inlet connector opening 20 .
  • the construction according to the invention ensures that the cooling medium, despite being fed into the cooling hood 1 in the middle, always has an air pressure that remains constant over the entire length of the chamber or length of the cooling hood Outlet 6 has, so that a constant outflow over the cooling length can be ensured.
  • Figure 5 shows an embodiment variant of the device 2 according to the invention for the heat treatment of long steel products 3, which comprises a receiving device 22 for receiving the hot-rolled long steel product 3 and, in the present case, three heat treatment units 1, via which the long steel product 3 to be cooled can be subjected to the gaseous cooling medium and thus cooled in a targeted manner is.
  • the device 1 also includes a transport device 23 and a lifting table 24, via which the long steel product shown in the form of a rail 3 can be raised and fed to the receiving device 22.
  • the receiving device 22 includes a clamping device 25 by means of which the rail 3 can be clamped.
  • the clamping device 25 can be designed in such a way that the rail 3 can be moved longitudinally in the device 2 by means of roller table rollers 26 .
  • the rail 3 can be fixed stationary on a table and the cooling system can be moved back and forth longitudinally over the rail 3 during cooling.
  • FIG. 6 shows an embodiment variant of a control process for the heat treatment of a long steel product or a rail 3 .
  • Each of the three cooling hoods 1 is assigned a temperature sensor 27 in the form of a pyrometer and positioned in such a way that the temperatures can be measured from the rail head sides TOP, SIDE-LEFT and SIDE-RIGHT during the cooling process.
  • the recorded temperatures T_TOPi St , T_ SIDE-LEFTist and T_ SIDE-RIGHTist are transmitted to a computer unit 28 and compared with a setpoint temperature (T SO II ) of a technological model. If one of the detected temperatures is greater than the target temperature, the cooling capacity can be increased by a Increasing the speed of a corresponding fan 29 can be individually adjusted so that the temperature difference is minimized.
  • T SO II setpoint temperature
  • FIG. 7 shows hardness measurements in the cross-sectional area of a rail head which has not been subjected to a heat treatment.
  • FIG. 8 shows a rail which has been heat-treated according to the method according to the invention. As can be seen from the values, the hardnesses in the rail head are on average up to 22% higher as a result of the cooling process according to the invention.

Abstract

La présente invention concerne une unité de traitement thermique, en particulier un capot de refroidissement, comprenant une chambre avec une ouverture d'entrée à travers laquelle un milieu de refroidissement gazeux peut être alimenté dans la chambre et une ouverture de sortie en forme de fente à travers laquelle le milieu de refroidissement gazeux peut être déchargé rapidement, la chambre comprenant un segment de chambre central et un premier et un second segment de chambre externe s'étendant depuis le segment de chambre central et les deux segments de chambre externe ont une section transversale qui diminue proportionnellement en direction des extrémités distales des segments de chambre, et un dispositif pour le traitement thermique de produits longs en acier laminé à chaud.
EP22725191.5A 2021-05-31 2022-04-22 Refroidissement forcé par circulation d'air pour refroidir des produits longs en acier Pending EP4348148A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102021205520 2021-05-31
DE102021212523.9A DE102021212523A1 (de) 2021-05-31 2021-11-08 Forcierte Luftkühlung zur Kühlung von Langstahlerzeugnissen
PCT/EP2022/060726 WO2022253489A1 (fr) 2021-05-31 2022-04-22 Refroidissement forcé par circulation d'air pour refroidir des produits longs en acier

Publications (1)

Publication Number Publication Date
EP4348148A1 true EP4348148A1 (fr) 2024-04-10

Family

ID=81841972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22725191.5A Pending EP4348148A1 (fr) 2021-05-31 2022-04-22 Refroidissement forcé par circulation d'air pour refroidir des produits longs en acier

Country Status (3)

Country Link
EP (1) EP4348148A1 (fr)
KR (1) KR20230170028A (fr)
WO (1) WO2022253489A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398700A (en) * 1982-09-29 1983-08-16 Midland-Ross Corporation Annealing furnace with an improved cooling section
DE3579681D1 (de) 1984-12-24 1990-10-18 Nippon Steel Corp Verfahren und vorrichtung zum waermebehandeln von schienen.
AT384624B (de) * 1986-05-22 1987-12-10 Voest Alpine Ag Einrichtung zur gesteuerten waermebehandlung von weichenteilen
US5183519A (en) * 1987-03-19 1993-02-02 Chemetron-Railway Products, Inc. Method for quenching railway rail heads
DE10137596A1 (de) 2001-08-01 2003-02-13 Sms Demag Ag Verfahren zur Kühlung von Werkstücken, insbesondere von Profilwalzprodukten, aus Schienenstählen
US7968046B2 (en) * 2005-08-01 2011-06-28 Ebner Industrieofenbau Ges.M.B.H Apparatus for cooling a metal strip
ITMI20111092A1 (it) * 2011-06-17 2012-12-18 Eagle Tech S R L Cappa perfezionata per il raffreddamento controllato di profili estrusi di alluminio o di altri metalli in uscita dalla linea di estrusione.
PL2987872T3 (pl) * 2013-04-17 2018-12-31 Scientific And Manufacturing Enterprise "Tomsk Electronic Company" Ltd. Urządzenie do termicznej obróbki szyn
CN203269984U (zh) * 2013-05-14 2013-11-06 武汉钢铁(集团)公司 重轨轨头淬火喷淋装置

Also Published As

Publication number Publication date
WO2022253489A1 (fr) 2022-12-08
KR20230170028A (ko) 2023-12-18

Similar Documents

Publication Publication Date Title
EP2155411B1 (fr) Dispositif pour influer sur la répartition de température sur une largeur
DE69431178T3 (de) Verfahren zur thermischen Oberflächenbehandlung eines Stranges
DE3027846A1 (de) Verfahren und einrichtung zum abkuehlen von blech, insbesondere stahlblech, mittels wasser
DE102016102093B3 (de) Durchlaufkühlvorrichtung und Verfahren zum Abkühlen eines Metallbandes
EP3234204B1 (fr) Dispositif et procédé de traitement en continu d'une bande métallique
DE10137596A1 (de) Verfahren zur Kühlung von Werkstücken, insbesondere von Profilwalzprodukten, aus Schienenstählen
EP1456421B1 (fr) Procede et dispositif pour dresser et refroidir de maniere regulee un feuillard metallique large, notamment un feuillard d'acier ou une tole, sortant d'un laminoir a chaud pour feuillards
EP2344287A2 (fr) Procédé et dispositif pour le refroidissement d'une bande préliminaire ou d'une bande d'une ligne continue métallique dans un laminoir à chaud
DE202015104565U1 (de) Kühl- und Spritzwassersystem für mitteldickes Blech nach dem Walzen
EP3713685B1 (fr) Barre de refroidissement et processus de refroidissement avec taux de refroidissement variable pour tôles d'acier
WO2022253489A1 (fr) Refroidissement forcé par circulation d'air pour refroidir des produits longs en acier
DE3537508C2 (fr)
DE102021212523A1 (de) Forcierte Luftkühlung zur Kühlung von Langstahlerzeugnissen
EP4214010B1 (fr) Procédé et appareil de pulvérisation pour le traitement thermique de surface d'un produit métallique
EP0998993A2 (fr) Procédé et dispositif pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud
WO2017144315A1 (fr) Dispositif et procédé pour le traitement thermique d'un produit plat
DE102010040984A1 (de) Verfahren und Vorrichtung zur Behandlung einer Extrudatoberfläche
EP0875304B1 (fr) Procédé et agrégat de refroidissement pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud
CH621364A5 (en) Process and equipment for the heat treatment of switch components
EP3887071B1 (fr) Dispositif de refroidissement et système de refroidissement servant à refroidir un produit à refroidir
DE2501175C3 (de) Vorrichtung zur Wärmebehandlung von Profilstahlabschnitten für den untertägigen Streckenausbau
EP3491156B1 (fr) Procédé pour former un cintrage transversal dans une bande de métal sortant d'un four de recuit et utilisation d'un appareil pour former un cintrage transversal dans une bande de métal sortant d'un four de recuit
DD293067A5 (de) Verfahren und vorrichtung zum regelbaren beschichten von metallischem umformgut
DE2940826A1 (de) Verfahren zur tiefenhaertung von werkstuecken sowie vorrichtung zur durchfuehrung dieses verfahrens
DE102010008389A1 (de) Walzanlage zum Erzeugen eines rohrförmigen Produkts und Verfahren zum Erzeugen eines rohrförmigen Produkts

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

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

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240102

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR