EP1809775B1 - Device for cooling long objects - Google Patents

Device for cooling long objects Download PDF

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Publication number
EP1809775B1
EP1809775B1 EP05797187A EP05797187A EP1809775B1 EP 1809775 B1 EP1809775 B1 EP 1809775B1 EP 05797187 A EP05797187 A EP 05797187A EP 05797187 A EP05797187 A EP 05797187A EP 1809775 B1 EP1809775 B1 EP 1809775B1
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EP
European Patent Office
Prior art keywords
gas
cooling
diameter
cladding tube
nozzles
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Not-in-force
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EP05797187A
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German (de)
French (fr)
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EP1809775A2 (en
Inventor
Anders ASTRÖM
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Linde GmbH
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Linde GmbH
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    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted 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
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races

Definitions

  • the invention relates to a device for cooling long objects according to the preamble of claim 1.
  • the length expansion is substantially greater than the dimensions in the width and / or in height.
  • rapid quenching is often required to suitably transform microstructures.
  • the object of the invention is to propose a device with which long or endless objects can be gas-cooled reliably, quickly and economically. This object is achieved by a device with the features of claim 1. Embodiments of the invention are objects of dependent claims.
  • the device according to the invention has two differently dimensioned chambers or regions, wherein in the first chamber (nozzle region) a plurality of nozzles are provided, which blow cold gas jets onto the object to be cooled.
  • the second region (cladding tube) is a relatively long dusentransports cladding and enclosing the object to be cooled over a longer range.
  • the gap formed between the object to be cooled and the inner wall of the cladding tube flows through the cold gas which has been sprayed from the nozzles towards the object and thus either further cools the article as the article moves or cools it in the direction of the gas when the direction of movement of the object is against the gas direction.
  • the cross section of the cladding tube is adapted to the object to be cooled. If the object is round, the cladding tube is also cylindrical, rectangular in the case of rectangular bars. The cladding closely encloses the article so that the cooling gas is conducted close to the article.
  • the invention may be located on one side of the nozzle portion, a sealing region which rests relatively close to the object to be cooled and prevents refrigerant gas escaping in this direction. This has the advantage that the cooling gas flows only in the preferred direction.
  • the cladding tube has a smaller diameter than the nozzle area.
  • N 2 , H 2 , helium or N 2 H 2 mixtures, N 2 -helium mixtures, H 2 -helium mixtures or thermal mixtures of N 2 , H 2 and helium are advantageous.
  • the gases can be reused.
  • the reuse and cooling of the gases in one heat exchanger is worthwhile for a further or several passes.
  • less expensive gases such as N 2 or CO 2 can be dispensed with.
  • the dimensions of the objects to be cooled can range from wires of about 1 mm in diameter to tubes of any diameter, that is from a few centimeters to a few meters in diameter.
  • Starting temperatures may be in the range of 400 to 1400 ° C, the starting temperature being dependent on the alloy and quenching requirements.
  • the gas pressures during spraying can be between 0 and 10 bar.
  • the nozzles for discharging the gas jets are preferably oriented so as to blow in the radial direction on the object to be cooled, so that the entire circumference of the object is uniformly applied.
  • the pressure within the spray nozzles is between 1 and 10 bar, preferably between 1 and 3 bar, e.g. at 2 bar, which then impact or impact velocities between 70 and 200 m / sec., Preferably between 100 and 180 m / s, can be achieved. However, speeds up to the speed of sound are also possible. For certain types of nozzles, the impact speeds may even be greater than the speed of sound.
  • the preferred distance between the article to be cooled and the gas-carrying casing is chosen such that the gas velocity in the cladding tube gap is between one and ten meters per second (preferably between 3 and 6 m / s).
  • the direction of the gas can run both with the product direction and against the product direction. If such a plant is connected to a heating furnace or to a device for casting, drawing or producing the metal, this object will always move in one direction.
  • the gas may then flow parallel thereto or in the opposite direction. Preferably, the gas flow in the opposite direction, because then a more uniform cooling is achieved. If such an opposite river can not be reached, the river can also be in the direction of the product.
  • the gap between the cooling jacket and the object should not be so small that a significant back pressure arises and prevents the gas from flowing off, so that a significant back pressure is created with respect to the gas flowing from the nozzles.
  • the gas volume should be controlled so that the gas leaving the unit is not unduly hot.
  • Turbulence generating units can be installed inside the pipe, which destroy the laminar flow, create turbulence and therefore lead to better cooling.
  • the length of the cladding tube is chosen so that, together with the product speed, the intended final temperature of the product is achieved. This is possible due to greater length if a lower end temperature is desired.
  • the figure shows schematically the object 2 to be cooled, in this case a rod or a tube, within the cooling device according to the invention.
  • the cooling device according to the invention comprises a nozzle region 2 and a cladding tube 6, which adjoins the nozzle region 4 in the nozzle region 4, the nozzles 8 are shown schematically.
  • a sealing region 10 connects, which rests relatively close to the object 2 and prevents leakage of the gas to the left.
  • swirling elements 12 which may also extend over the entire circumference of the cladding tube.
  • the function is the following:
  • the object 2 to be cooled moves either from left to right or from right to left through the device according to the invention.
  • cold gas is blown through the nozzles 8 onto the object 2.
  • the object 2 cools strongly in the nozzle area 4.
  • the gas then flows through the gap between the article 2 and the cladding tube 6 to the right, where it further cools the article 2.
  • Preferred dimensions are:
  • the length of the cladding tube is 2 to 50, preferably 30 to 50 times as large as its diameter, so for example between 0.1 and 1 m.
  • the gaps between the object 2 and the cladding tube 6 are between 5 and 20 mm.
  • the nozzle diameters are for example 1.2 mm.
  • the length of the nozzle area is a few centimeters to decimeters.

Abstract

The invention relates to a device for cooling long objects such as wires, tubes or rods. In order to provide improved cooling, provision is made of a nozzle region which has a diameter greater than the diameter of the object and contains a plurality of nozzles which blow a cooling gas at the object, and a cladding tube whose diameter is equal to or less than the diameter of the nozzle region.

Description

Die Erfindung betrifft eine Vorrichtung zum Kühlen von langen Gegenständen nach dem Oberbegriff des Anspruchs 1. Unter langen Gegenständen werden Drähte, Rohre, Stäbe, Federstähle, Platten und ähnliche Gegenstände verstanden, deren Längesausdehnung wesentlich größer ist, als die Ausdehnungen in der Breite und/oder in der Höhe. Beim Herstellen (Gießen oder Ziehen) solcher "endloser" Gegenstände oder nach der Wärmebehandlung ist häufig ein schnelles Abkühlen (Quenchen) erforderlich, um Gefüge geeignet umzuwandeln.The invention relates to a device for cooling long objects according to the preamble of claim 1. Under long articles wires, tubes, rods, spring steels, plates and similar objects are understood, the length expansion is substantially greater than the dimensions in the width and / or in height. In making (casting or drawing) such "endless" articles or after the heat treatment, rapid quenching is often required to suitably transform microstructures.

Aus dem Artikel: " An evaluation of multiple-jet impingement gas quenching of steel rings" von J. Ferrari, N. Lior, vom 19. Januar 2002 ist eine Vorrichtung bekannt, bei der Kugellager in ein Feld von Gasdüsen gebracht werden. Zum schnellen Abkühlen oder Quenchen der heißen Kugellager werden durch eine Vielzahl von Düsen Gasströme auf die Gegenstände geleitet, um diese schnell abzukühlen. Diese Vorrichtung eignet sich nur für relativ kompakte Gegenstände, die keine zu großen Ausdehnungen haben. Aus der Patentanmeldung US 2002/0195753 ist eine Vorrichtung zum Kühlen von langen Cregenstanden bekannt.From the article: " An evaluation of multiple-jet impingement gas quenching of steel rings "by J. Ferrari, N. Lior, January 19, 2002 a device is known in which ball bearings are brought into a field of gas nozzles. For rapid cooling or quenching of the hot ball bearings, gas streams are directed to the articles through a plurality of nozzles to cool them quickly. This device is only suitable for relatively compact objects that do not have too large dimensions. From the patent application US 2002/0195753 is a device for cooling long Cregenstanden known.

Aufgabe der Erfindung ist es, eine Vorrichtung vorzuschlagen, mit der lange oder endlose Gegenstände zuverlässig, schnell und wirtschaftlich gasgekühlt werden können. Diese Aufgabe wird erfindungsgemäß gelöst von einer Vorrichtung mit den Merkmalen des Anspruchs 1. Ausgestaltungen der Erfindung sind Gegenstände von Unteransprüchen.The object of the invention is to propose a device with which long or endless objects can be gas-cooled reliably, quickly and economically. This object is achieved by a device with the features of claim 1. Embodiments of the invention are objects of dependent claims.

Die erfindungsgemäße Vorrichtung weist zwei unterschiedlich dimensionierte Kammern oder Bereiche auf, wobei in der ersten Kammer (Düsenbereich) eine Vielzahl von Düsen vorgesehen sind, welche Kaltgasjets auf den zu kühlenden Gegenstand blasen. Der zweite Bereich (Hüllrohr) ist ein relativ lang es dusenfreies Hüllrohr und umschließt den zu kühlenden Gegenstand über einen längeren Bereich. Der sich zwischen dem zu kühlenden Gegenstand und der Innenwand des Hüllrohrs bildende Spalt wird vom Kaltgas durchströmt, welches aus den Düsen zum Gegenstand hin gesprüht wurde und kühlt so den Gegenstand entweder weiter ab, wenn sich der Gegenstand in Richtung des Gases bewegt oder kühlt ihn vor, wenn die Bewegungsrichtung des Gegenstandes gegen die Gasrichtung verläuft. Durch eine relativ enge Ausbildung des Spaltes zwischen der Kühlkammer und dem zu kühlenden Gegenstand kann ein relativ inniger Kontakt zwischen Gas und Gegenstand erreicht werden, so dass die Kühlwirkung des Gases relativ gut ausgenutzt wird. Der Querschnitt des Hüllrohres ist dem zu kühlenden Gegenstand angepasst. Ist der Gegenstand rund, ist auch das Hüllrohr zylindrisch, bei rechteckigen Stäben rechteckig. Das Hüllrohr umschließt den Gegenstand eng, so dass das Kühlgas nahe am Gegenstand geführt wird.The device according to the invention has two differently dimensioned chambers or regions, wherein in the first chamber (nozzle region) a plurality of nozzles are provided, which blow cold gas jets onto the object to be cooled. The second region (cladding tube) is a relatively long dusenfreies cladding and enclosing the object to be cooled over a longer range. The gap formed between the object to be cooled and the inner wall of the cladding tube flows through the cold gas which has been sprayed from the nozzles towards the object and thus either further cools the article as the article moves or cools it in the direction of the gas when the direction of movement of the object is against the gas direction. By a relatively narrow formation of the gap between the cooling chamber and the object to be cooled, a relatively intimate contact between the gas and the object can be achieved, so that the cooling effect of the gas is relatively well utilized. The cross section of the cladding tube is adapted to the object to be cooled. If the object is round, the cladding tube is also cylindrical, rectangular in the case of rectangular bars. The cladding closely encloses the article so that the cooling gas is conducted close to the article.

In einer Ausführung der Erfindung kann an einer Seite des Düsenbereichs ein Dichtbereich liegen, der relativ eng an den zu kühlenden Gegenstand anliegt und verhindert, dass Kühlgas in diese Richtung entweicht. Dies hat den Vorteil, dass das Kühlgas nur in die bevorzugte Richtung fließt.In one embodiment of the invention may be located on one side of the nozzle portion, a sealing region which rests relatively close to the object to be cooled and prevents refrigerant gas escaping in this direction. This has the advantage that the cooling gas flows only in the preferred direction.

In einer bevorzugten Ausführung hat das Hüllrohr einen kleineren Durchmesser als der Düsen-Bereich. Dadurch wird der Kontakt zwischen Gas und zu kühlendem Gegenstand noch inniger. Die Gasgeschwindigkeit wird durch den kleineren Spalt bei gleichem Druck größer und die Kühlwirkung verstärkt.In a preferred embodiment, the cladding tube has a smaller diameter than the nozzle area. As a result, the contact between the gas and the object to be cooled becomes even more intimate. The gas velocity is increased by the smaller gap at the same pressure and the cooling effect amplified.

Als Gase können alle bekannten technischen Gase eingesetzt werden. Vorteilhaft sind N2, H2, Helium oder N2H2-Mischungen, N2-Helium-Mischungen, H2-Helium-Mischungen oder Temärmischungen aus N2, H2 und Helium.As gases all known technical gases can be used. N 2 , H 2 , helium or N 2 H 2 mixtures, N 2 -helium mixtures, H 2 -helium mixtures or thermal mixtures of N 2 , H 2 and helium are advantageous.

Bevorzugt können die Gase wieder verwendet werden. Insbesondere bei Helium, Wasserstoff oder anderen teuren Gasen lohnt sich die Wiederverwendung und Abkühlung der Gase in einem Wärmetauscher für einen weiteren oder mehrere Durchläufe. Bei preiswerteren Gasen wie N2 oder CO2 kann darauf verzichtet werden.Preferably, the gases can be reused. Especially in the case of helium, hydrogen or other expensive gases, the reuse and cooling of the gases in one heat exchanger is worthwhile for a further or several passes. For less expensive gases such as N 2 or CO 2 can be dispensed with.

Die Dimensionen der zu kühlenden Gegenstände können von Drähten mit ca. 1 mm Durchmesser angefangen bis zu Röhren von beliebigen Durchmessern reichen, also von einigen Zentimetern bis zu einigen Metern im Durchmesser. Starttemperaturen können im Bereich von 400 bis 1400 °C liegen, wobei die Starttemperatur abhängig ist von der Legierung und den Erfordernissen beim Quenchen. Die Gasdrücke beim Einsprühen können zwischen 0 und 10 bar liegen.The dimensions of the objects to be cooled can range from wires of about 1 mm in diameter to tubes of any diameter, that is from a few centimeters to a few meters in diameter. Starting temperatures may be in the range of 400 to 1400 ° C, the starting temperature being dependent on the alloy and quenching requirements. The gas pressures during spraying can be between 0 and 10 bar.

Die Düsen zum Abgeben der Gasjets sind bevorzugt so orientiert, dass sie in radialer Richtung auf den zu kühlenden Gegenstand blasen, so dass der gesamte Umfang des Gegenstands gleichmäßig beaufschlagt wird.The nozzles for discharging the gas jets are preferably oriented so as to blow in the radial direction on the object to be cooled, so that the entire circumference of the object is uniformly applied.

Der Druck innerhalb der Aufsprühdüsen liegt zwischen 1 und 10 bar, bevorzugt zwischen 1 und 3 bar, z.B. bei 2 bar, wobei dann Aufstoß- oder Auftreff-Geschwindigkeiten zwischen 70 und 200 m/sec., bevorzugt zwischen 100 und 180 m/s, erreicht werden. Möglich sind allerdings auch Geschwindigkeiten bis zur Schallgeschwindigkeit. Für bestimmte Düsentypen können die Aufstoß-Geschwindigkeiten sogar größer als die Schallgeschwindigkeit sein.The pressure within the spray nozzles is between 1 and 10 bar, preferably between 1 and 3 bar, e.g. at 2 bar, which then impact or impact velocities between 70 and 200 m / sec., Preferably between 100 and 180 m / s, can be achieved. However, speeds up to the speed of sound are also possible. For certain types of nozzles, the impact speeds may even be greater than the speed of sound.

Der bevorzugte Abstand zwischen dem zu kühlenden Gegenstand und der gasführenden Hülle ist so gewählt, dass die Gasgeschwindigkeit im Hüllrohrspalt zwischen einem und zehn Metern pro Sekunde (bevorzugt zwischen 3 und 6 m/s) liegt.The preferred distance between the article to be cooled and the gas-carrying casing is chosen such that the gas velocity in the cladding tube gap is between one and ten meters per second (preferably between 3 and 6 m / s).

Die Richtung des Gases kann sowohl gleich mit der Produktrichtung als auch gegen die Produktrichtung verlaufen. Wenn eine solche Anlage an einen Wärmeofen oder an eine Einrichtung zum Gießen, Ziehen oder Erzeugen des Metalls angeschlossen ist, wird dieser Gegenstand sich stets in eine Richtung bewegen. Das Gas kann dann parallel dazu oder in Gegenrichtung fließen. Bevorzugt ist der Gasfluss in Gegenrichtung, weil dann eine gleichmäßigere Kühlung erreicht wird. Sollte so ein gegenläufiger Fluss nicht erreichbar sein, kann der Fluss auch in Produktrichtung erfolgen.The direction of the gas can run both with the product direction and against the product direction. If such a plant is connected to a heating furnace or to a device for casting, drawing or producing the metal, this object will always move in one direction. The gas may then flow parallel thereto or in the opposite direction. Preferably, the gas flow in the opposite direction, because then a more uniform cooling is achieved. If such an opposite river can not be reached, the river can also be in the direction of the product.

Sollte die Länge der Kühlvorrichtung nicht ausreichen, um den Gegenstand ausreichend abzukühlen, können mehrere solcher Einheiten hintereinander geschaltet werden, um eine ausreichende Kühlkapazität zu erreichen.Should the length of the cooling device be insufficient to sufficiently cool the article, several such units may be connected in series to achieve sufficient cooling capacity.

Andererseits sollte der Spalt zwischen dem Kühlmantel und dem Gegenstand nicht so klein sein, dass ein erheblicher Gegendruck entsteht und das Gas am Abfließen hindert, so dass ein bedeutender Gegendruck gegenüber den aus den Düsen fließenden Gas entsteht. Auf der anderen Seite sollte das Gasvolumen so kontrolliert sein, dass das Gas, welches die Einheit verlässt, nicht unzulässig heiß ist.On the other hand, the gap between the cooling jacket and the object should not be so small that a significant back pressure arises and prevents the gas from flowing off, so that a significant back pressure is created with respect to the gas flowing from the nozzles. On the other hand, the gas volume should be controlled so that the gas leaving the unit is not unduly hot.

Innerhalb des Rohres können turbulenzerzeugende Einheiten (Verwirbelungselemente) installiert werden, die den laminaren Fluss zerstören, Turbulenzen erzeugen und deshalb zu einer besseren Kühlung führen.Turbulence generating units (turbulators) can be installed inside the pipe, which destroy the laminar flow, create turbulence and therefore lead to better cooling.

Die Länge des Hüllrohres wird so gewählt, dass zusammen mit der Produktgeschwindigkeit die vorgesehene Endtemperatur des Produkts erreicht wird. Dies ist möglich durch größere Länge, wenn eine tiefere Endtemperatur gewünscht wird.The length of the cladding tube is chosen so that, together with the product speed, the intended final temperature of the product is achieved. This is possible due to greater length if a lower end temperature is desired.

Eine Ausführungsform der Erfindung wird anhand einer Figur näher erläutert. Die Figur zeigt schematisch den zu kühlenden Gegenstand 2, hier ein Stab oder ein Rohr, innerhalb der erfindungsgemäßen Kühleinrichtung. Die erfindungsgemäße Kühleinrichtung enthält einen Düsenbereich 2 und ein Hüllrohr 6, welches sich an den Düsenbereich 4 anschließt im Düsenbereich 4 sind die Düsen 8 schematisch eingezeichnet. Links vom Düsenbereich 4 schließt sich ein Dichtbereich 10 an, der relativ eng an dem Gegenstand 2 anliegt und ein Abströmen des Gases nach links verhindert. Unten sind Verwirbelungselemente 12 gezeigt, die sich auch über den ganzen Umfang des Hüllrohrs erstrecken können.An embodiment of the invention will be explained in more detail with reference to a figure. The figure shows schematically the object 2 to be cooled, in this case a rod or a tube, within the cooling device according to the invention. The cooling device according to the invention comprises a nozzle region 2 and a cladding tube 6, which adjoins the nozzle region 4 in the nozzle region 4, the nozzles 8 are shown schematically. To the left of the nozzle region 4, a sealing region 10 connects, which rests relatively close to the object 2 and prevents leakage of the gas to the left. Below are shown swirling elements 12, which may also extend over the entire circumference of the cladding tube.

Die Funktion ist folgende:The function is the following:

Der zu kühlende Gegenstand 2 bewegt sich entweder von links nach rechts oder von rechts nach links durch die erfindungsgemäße Vorrichtung. Zum Kühlen wird kaltes Gas durch die Düsen 8 auf den Gegenstand 2 geblasen. Dadurch kühlt sich der Gegenstand 2 im Düsenbereich 4 stark ab. Das Gas fließt dann durch den Spalt zwischen dem Gegenstand 2 und dem Hüllrohr 6 nach rechts, wobei es den Gegenstand 2 weiter kühlt.The object 2 to be cooled moves either from left to right or from right to left through the device according to the invention. For cooling, cold gas is blown through the nozzles 8 onto the object 2. As a result, the object 2 cools strongly in the nozzle area 4. The gas then flows through the gap between the article 2 and the cladding tube 6 to the right, where it further cools the article 2.

Bevorzugte Bemessungen sind:Preferred dimensions are:

Die Länge des Hüllrohrs ist 2 bis 50, bevorzugt 30 bis 50 mal so groß wie sein Durchmesser, liegt also zum Beispiel zwischen 0,1 und 1 m. Die Spalte zwischen dem Gegenstand 2 und dem Hüllrohr 6 liegen zwischen 5 und 20 mm. Die Düsendurchmesser liegen z.B. bei 1,2 mm. Die Länge des Düsenbereichs liegt bei einigen Zentimetern bis Dezimetern.The length of the cladding tube is 2 to 50, preferably 30 to 50 times as large as its diameter, so for example between 0.1 and 1 m. The gaps between the object 2 and the cladding tube 6 are between 5 and 20 mm. The nozzle diameters are for example 1.2 mm. The length of the nozzle area is a few centimeters to decimeters.

Für einen guten Wärmeübertragungskoeffizienten sollte gelten: d = 0,1 bis 0,2 x H bevorzugt: d = 0,18 H und t = 1 bis 1,5 x H bevorzugt: t = 1,3 H mit d = Jetdurchmesser in m
H = Abstand zum Gegenstand
t = Abstand der Düsenmitten voneinander For a good heat transfer coefficient, the following should apply: d = 0.1 to 0.2 x H prefers: d = 0.18 H and t = 1 to 1.5 x H prefers: t = 1.3 H with d = jet diameter in m
H = distance to the object
t = distance of the nozzle centers from each other

Claims (4)

  1. Device for cooling long objects (2) having a nozzle region (4) which has a diameter greater than the diameter of the object (2) and contains a plurality of nozzles (8) which blow a cooling gas at the object (2), characterized by a nozzle-free cladding tube (6) whose diameter is equal to or less than the diameter of the nozzle region (4).
  2. Device according to Claim 1, characterized in that a sealing region (10) is provided.
  3. Device according to Claim 1, characterized in that the cladding tube (6) has a length of 0.1 to 1 m.
  4. Device according to one of the preceding claims, characterized in that the cooling gas is re-used.
EP05797187A 2004-11-11 2005-10-25 Device for cooling long objects Not-in-force EP1809775B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004054627A DE102004054627A1 (en) 2004-11-11 2004-11-11 Device for cooling long objects
PCT/EP2005/011447 WO2006050814A2 (en) 2004-11-11 2005-10-25 Device for cooling long objects

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EP1809775A2 EP1809775A2 (en) 2007-07-25
EP1809775B1 true EP1809775B1 (en) 2009-01-14

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US (1) US7497984B2 (en)
EP (1) EP1809775B1 (en)
AT (1) ATE420979T1 (en)
BR (1) BRPI0517300B1 (en)
DE (2) DE102004054627A1 (en)
ES (1) ES2321120T3 (en)
WO (1) WO2006050814A2 (en)

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US9290823B2 (en) 2010-02-23 2016-03-22 Air Products And Chemicals, Inc. Method of metal processing using cryogenic cooling
EP2933342A1 (en) * 2014-04-15 2015-10-21 Böhler-Uddeholm Precision Strip GmbH Method and device for producing a strip steel with bainitic microstructure

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JPS5767134A (en) * 1980-10-09 1982-04-23 Nippon Steel Corp Method and installation for continuous annealing method of cold-rolled steel strip
DE3234863C2 (en) * 1982-09-21 1986-04-10 Messer Griesheim Gmbh, 6000 Frankfurt Process and device for bright annealing of metallic workpieces with nitrogen as protective gas
US6656413B2 (en) * 2001-06-21 2003-12-02 Can-Eng Furnaces Ltd Method and apparatus for quenching metal workpieces
FR2844809B1 (en) * 2002-09-20 2007-06-29 Air Liquide RAPID COOLING PROCESS OF PARTS BY CONVECTIVE AND RADIATIVE TRANSFER

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BRPI0517300A (en) 2008-10-07
WO2006050814A3 (en) 2007-12-13
DE102004054627A1 (en) 2006-05-18
ATE420979T1 (en) 2009-01-15
US20070289678A1 (en) 2007-12-20
WO2006050814A2 (en) 2006-05-18
BRPI0517300B1 (en) 2014-11-04
ES2321120T3 (en) 2009-06-02
DE502005006494D1 (en) 2009-03-05
US7497984B2 (en) 2009-03-03

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