EP1520051A1 - Device for cooling and/or rinsing steel wires and/or tapes - Google Patents
Device for cooling and/or rinsing steel wires and/or tapesInfo
- Publication number
- EP1520051A1 EP1520051A1 EP03756922A EP03756922A EP1520051A1 EP 1520051 A1 EP1520051 A1 EP 1520051A1 EP 03756922 A EP03756922 A EP 03756922A EP 03756922 A EP03756922 A EP 03756922A EP 1520051 A1 EP1520051 A1 EP 1520051A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- curtains
- cooling
- ribbon
- wire
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000001816 cooling Methods 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 239000002826 coolant Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 238000000034 method Methods 0.000 description 6
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods
Definitions
- the present invention relates to a device for cooling and / or rinsing at least one steel wire and / or ribbon.
- Son cooling baths have been known for a long time for quenching steel wires in order to obtain a transformation of the latter.
- This fairly complex device does not allow fine adjustment of the cooling temperature, requires the use of a high pressure circulation pump and a circuit of pipes, tanks and sprinklers which are susceptible to sealing problems.
- Aqueous baths are also known which have as their object the rinsing of steel wires, for example before and / or after an acid pickling bath.
- the present invention aims to develop a simple and inexpensive device which overcomes the aforementioned drawbacks.
- a device for cooling and / or rinsing at least one steel wire and / or ribbon comprising
- this device further comprising
- This device has the advantage that the contact between the coolant and the wire or ribbon is direct, without the possibility of formation of a vapor film around the wire or ribbon, film where the heat exchange is much less favorable.
- the coolant does not have time to form a film of vapor around the wire and exchange liquid thermal steel wire remains excellent.
- the process offers the advantage of being able to stop the cooling at any desired temperature by a simple determination of the number of curtains necessary. This is particularly important in the case of patenting steel wires, where it is necessary to avoid too rapid quenching which gives rise to the appearance of martensite in the steel, which is to be avoided in most cases.
- the tank is arranged below said at least one thread and / or ribbon in movement and the device further comprises means for projecting the curtains of said liquid in a turbulent upward flow.
- the coolant is sprayed under pressure at the like a continuous geyser and therefore very turbulent.
- the curtains with upward turbulent flow have a top and, from said top and at least on one side of each curtain with upward turbulent flow, a drop of turbulent flow liquid through which the said at least one thread also travels. and / or steel tape.
- the wire can therefore pass through three successive streams of liquid with turbulent flow, one ascending and the other two descending, which makes the subsequent cooling or rinsing very effective. It is of course also possible to provide a tank arranged above the scrolling wires and the fall or projection of curtains of coolant from the top.
- the means for projecting the device comprise means for supplying pressurized gas bubbles into a lower part of the tank and means for forcibly guiding bubbles which entrain the liquid upward in the form of curtains of liquid with turbulent upward flow.
- the means for supplying pressurized gas bubbles into a lower part of the tank Preferably use an inert gas with respect to steel, and in particular air.
- the air bubbles under pressure entrain the coolant and simultaneously make its flow turbulent, which promotes the desired direct heat exchange.
- the upward projection by air bubbles does not require an expensive energy expenditure and it makes it possible to avoid any pumping system for the coolant.
- the coolant and / or rinse aid can be any suitable liquid, water, lead, liquid salt, a polymer, oil, and in particular water, because all the disadvantages encountered by the use of water in the prior art can be overcome by the process according to the invention.
- the device is therefore in the form of a simple device which is easy to control and adjust and it allows consumption. only non-polluting and inexpensive materials, i.e. compressed air and cooling water.
- FIG. 1 represents a view in longitudinal section of a device for cooling and / or rinsing steel wires and / or ribbons according to the invention.
- FIG. 2 represents a plan view from above of FIG. 1.
- FIGs 1 and 2 there is shown a tank 1 containing cooling water 2. Above this tank scrolls one or more steel wires 3 in a direction of travel indicated by the arrow 4. Means current scrolling drive systems are represented schematically by the references 23 and 24.
- the water can be supplied by an inlet 5 and be discharged from the top by an overflow 6.
- the column height d water is approximately 750mm H 2 0 (7350 Pa).
- the overflow 6 can be in communication with a lower inlet 5 ′, by means of a heat exchanger not shown, so as to put the cooling water into circulation.
- the tank also includes means for projecting rising water curtains.
- These projection means include air supply ducts 7 to 9 arranged at the bottom of the tank parallel to one another and transversely to the direction of travel of the wires and / or ribbons.
- Each of these conduits is connected, through corresponding openings in the tank and by means of fittings 10 to 12, to a distributor duct 13 supplied with pressurized air by a fan 14.
- a shut-off valve 22 On each fitting 10 to 12 is provided a shut-off valve 22 which makes it possible to adjust the supply of pressurized air to the conduits 7 to 9 and to put them on or off as required.
- the air bubbles entrain the water of the tank during their ascent and expel a curtain of turbulent water 17 upwards.
- a pressure of the order of 1000 mm of H 2 0 (9806 Pa) for example the air bubbles entrain the water of the tank during their ascent and expel a curtain of turbulent water 17 upwards.
- the top of the water curtain it can be split in two and form two turbulent waterfalls 18 and 19 that the wire to be cooled must also pass through.
- the pairs of guide plates 15, 16 can be arranged sufficiently tightly in their succession so that the waterfalls of two neighboring curtains can cross. Of in this way, the wire runs continuously in water, and yet there is never the possibility of the formation of a film of water vapor around the wire.
- a cover 20 which closes the tank upwards and which presents deflectors 21 to orient the direction of the waterfalls 18 and 19.
- TTT curves transformation, temperature, time
- the wires are located opposite the nose of the S-curves, that is to say at a temperature corresponding to the minimum incubation time, to pass through these curves, which makes it possible to avoid disturbances that could influence the structure of the steel.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
"Dispositif de refroidissement et/ou de rinçage de fils et/ou rubans en acier" "Cooling and / or rinsing device for steel wires and / or ribbons"
La présente invention est relative à un dispositif de refroidissement et/ou de rinçage d'au moins un fil et/ou ruban en acier. On connaît depuis longtemps des bains de refroidissement de fils destinés à une trempe des fils en acier en vue d'obtenir une transformation de celui-ci.The present invention relates to a device for cooling and / or rinsing at least one steel wire and / or ribbon. Son cooling baths have been known for a long time for quenching steel wires in order to obtain a transformation of the latter.
On peut citer par exemple le patentage de fils d'acier comprenant une trempe isotherme, c'est-à-dire un refroidissement rapide de fils amenés à la température austénitique jusque dans une zone de formation perlitique où les fils sont maintenus de manière plus ou moins isotherme pour assurer la décomposition sensiblement complète de l'austénite et un détensionnement de l'acier.One can cite for example the patenting of steel wires comprising an isothermal quenching, that is to say a rapid cooling of wires brought to the austenitic temperature until in a zone of pearlitic formation where the wires are more or less maintained. less isothermal to ensure substantially complete decomposition of the austenite and stress relieving of the steel.
On connaît des procédés faisant usage de bains de plomb ou de sel fondu dans lesquels les fils à refroidir sont immergés. Ces procédés, très efficaces, sont à proscrire à l'heure actuelle pour des raisons de toxicité et de danger pour l'environnement.Processes are known which make use of lead or molten salt baths in which the wires to be cooled are immersed. These processes, very effective, are to be avoided at present for reasons of toxicity and danger to the environment.
On connaît aussi des procédés faisant usage de bains aqueux. Au cours de l'immersion dans un tel bain d'eau, à écoulement laminaire, non turbulent, il se forme un film de vapeur tout autour des fils à refroidir, qui ralentit le refroidissement (v. par exemple EP-A-There are also known processes making use of aqueous baths. During the immersion in such a non-turbulent laminar flow water bath, a film of vapor is formed all around the wires to be cooled, which slows down the cooling (see for example EP-A-
0 216 434).0 216 434).
Pour contrôler de manière judicieuse l'intensité et ia vitesse du refroidissement, ainsi qu'un maintien le plus isothermique possible des fils pendant leur transformation perlitique il a aussi été proposé de faire passer les fils au travers de plusieurs bains d'eau à écoulement laminaire, avec chaque fois formation d'un film de vapeur autour des fils à refroidir, et, entre différents bains aqueux, en alternance un refroidissement par de l'air, pendant lequel le film de vapeur disparaît (v. par exemple EP-B-0 524 689). Un tel procédé présente l'inconvénient d'être techniquement très difficile à appliquer et à calculer pour déterminer correctement quand les fils en acier ont atteint la température recherchée.To judiciously control the intensity and the speed of cooling, as well as keeping the wires as isothermal as possible during their pearlitic transformation, it has also been proposed to pass the wires through several baths of flowing water. laminar, with each time a vapor film is formed around the wires to be cooled, and, between different aqueous baths, alternately air-cooled, during which the vapor film disappears (see for example EP-B -0 524 689). Such a method has the drawback of being technically very difficult to apply and to calculate in order to correctly determine when the steel wires have reached the desired temperature.
On connaît aussi des dispositifs de refroidissement de fils d'acier comportant des gicleurs à partir desquels des jets d'eau sous haute pression peuvent être appliqués sur les fils à traiter (v. BE-A-Also known are steel wire cooling devices comprising nozzles from which high pressure water jets can be applied to the wires to be treated (see BE-A-
832391). Ce dispositif assez complexe ne permet pas un réglage fin de la température de refroidissement, nécessite l'usage d'une pompe de circulation à haute pression et d'un circuit de canalisations, réservoirs et gicleurs qui sont susceptibles de problèmes d'obturation. On connaît aussi des bains aqueux ayant pour objet le rinçage de fils d'acier par exemple avant et/ou après un bain de décapage à l'acide.832 391). This fairly complex device does not allow fine adjustment of the cooling temperature, requires the use of a high pressure circulation pump and a circuit of pipes, tanks and sprinklers which are susceptible to sealing problems. Aqueous baths are also known which have as their object the rinsing of steel wires, for example before and / or after an acid pickling bath.
Il faut noter que tous ces bains de liquide suivant l'état antérieur de la technique nécessitent un système de pompage de liquide qui consomme beaucoup d'énergie.It should be noted that all of these liquid baths according to the prior art require a liquid pumping system which consumes a lot of energy.
La présente invention a pour but de mettre au point un dispositif simple et peu coûteux qui permet de surmonter les inconvénients précités.The present invention aims to develop a simple and inexpensive device which overcomes the aforementioned drawbacks.
On résout ce problème suivant l'invention par un dispositif de refroidissement et/ou de rinçage d'au moins un fil et/ou ruban en acier, comprenantThis problem is solved according to the invention by a device for cooling and / or rinsing at least one steel wire and / or ribbon, comprising
- des moyens d'entraînement en défilement d'au moins un fil et/ou ruban en acier, ce dispositif comprenant en outre- means for driving the scrolling of at least one steel wire and / or ribbon, this device further comprising
- une cuve contenant un liquide de refroidissement et/ou de rinçage et pourvue de sorties à partir desquelles s'écoulent de manière turbulente un certain nombre de rideaux successifs de liquide au travers desquels défile ledit au moins un fil et/ou ruban en acier, et - des moyens d'ajustement du nombre de rideaux successifs à traverser par ledit au moins un fil et/ou ruban en fonction du refroidissement et/ou rinçage à atteindre.- a tank containing a cooling and / or rinsing liquid and provided with outlets from which flow so turbulent a number of successive curtains of liquid through which said at least one steel wire and / or ribbon passes, and - means for adjusting the number of successive curtains to be crossed by said at least one steel wire and / or ribbon cooling and / or flushing function to be achieved.
Ce dispositif offre l'avantage que le contact entre le liquide de refroidissement et le fil ou ruban est direct, sans possibilité de formation d'un film de vapeur autour du fil ou ruban, film où l'échange thermique est nettement moins favorable. Etant donné la vitesse de défilement du fil combinée à la vitesse d'écoulement de chaque rideau transversalement à la direction de défilement du fil, le liquide de refroidissement n'a pas le temps de former autour du fil un film de vapeur et l'échange thermique liquide-fil d'acier reste excellent. Simultanément le procédé offre l'avantage de pouvoir arrêter le refroidissement à n'importe quelle température souhaitée par une simple détermination du nombre de rideaux nécessaire. Cela est particulièrement important dans le cas du patentage de fils d'acier, où il faut éviter une trempe trop rapide qui donne lieu à l'apparition de martensite dans l'acier, ce qui est à éviter dans la plupart des cas. A cet effet, un simple réglage du nombre de rideaux à traverser en fonction de la vitesse de défilement du fil et de l'écoulement du liquide de refroidissement, ainsi que du diamètre du fil à refroidir, suffit. Ce réglage est simple puisqu'il suffit d'arrêter les rideaux en excès ou de mettre en marche les rideaux nécessaires pour atteindre la température souhaitée. Ce même réglage convient pour le rinçage et le nombre de rideaux à mettre en service se détermine de la même manière, très aisément.This device has the advantage that the contact between the coolant and the wire or ribbon is direct, without the possibility of formation of a vapor film around the wire or ribbon, film where the heat exchange is much less favorable. Given the wire running speed combined with the flow speed of each curtain transverse to the wire running direction, the coolant does not have time to form a film of vapor around the wire and exchange liquid thermal steel wire remains excellent. Simultaneously the process offers the advantage of being able to stop the cooling at any desired temperature by a simple determination of the number of curtains necessary. This is particularly important in the case of patenting steel wires, where it is necessary to avoid too rapid quenching which gives rise to the appearance of martensite in the steel, which is to be avoided in most cases. For this purpose, a simple adjustment of the number of curtains to be crossed as a function of the speed of travel of the wire and the flow of the coolant, as well as the diameter of the wire to be cooled, is sufficient. This adjustment is simple since it suffices to stop the excess curtains or to start the curtains necessary to reach the desired temperature. This same setting is suitable for rinsing and the number of curtains to be used is determined in the same way, very easily.
Suivant une forme de réalisation du dispositif suivant l'invention, la cuve est agencée en dessous dudit au moins un fil et/ou ruban en défilement et le dispositif comprend en outre des moyens de projection des rideaux de liquide susdits suivant un écoulement turbulent ascensionnel. Le liquide de refroidissement est projeté sous pression à la manière d'un geyser continu et donc très turbulent. Avantageusement, les rideaux à écoulement turbulent ascensionnel présentent un sommet et, à partir dudit sommet et au moins d'un côté de chaque rideau à écoulement turbulent ascensionnel, une chute de liquide à écoulement turbulent à travers laquelle défile en outre ledit au moins un fil et/ou ruban en acier. Lors de la réalisation d'un geyser de ce type, le fil peut donc traverser trois courants successifs de liquide à écoulement turbulent l'un ascensionnel et les deux autres descendant, ce qui rend très efficace le refroidissement ou le rinçage qui s'ensuit. On peut bien entendu prévoir également une cuve agencée au-dessus des fils en défilement et la chute ou la projection de rideaux de liquide de refroidissement à partir du haut.According to one embodiment of the device according to the invention, the tank is arranged below said at least one thread and / or ribbon in movement and the device further comprises means for projecting the curtains of said liquid in a turbulent upward flow. The coolant is sprayed under pressure at the like a continuous geyser and therefore very turbulent. Advantageously, the curtains with upward turbulent flow have a top and, from said top and at least on one side of each curtain with upward turbulent flow, a drop of turbulent flow liquid through which the said at least one thread also travels. and / or steel tape. When making a geyser of this type, the wire can therefore pass through three successive streams of liquid with turbulent flow, one ascending and the other two descending, which makes the subsequent cooling or rinsing very effective. It is of course also possible to provide a tank arranged above the scrolling wires and the fall or projection of curtains of coolant from the top.
Suivant une forme de réalisation perfectionnée de l'invention, les moyens de projection du dispositif comprennent des moyens d'alimentation de bulles de gaz sous pression dans une partie inférieure de la cuve et des moyens de guidage forcé, vers lesdites sorties, des bulles qui entraînent le liquide vers le haut sous la forme de rideaux de liquide à écoulement turbulent ascensionnel. On utilisera de préférence un gaz inerte vis-à-vis de l'acier, et en particulier de l'air. Les bulles d'air sous pression entraînent le liquide de refroidissement et rendent simultanément son écoulement turbulent, ce qui favorise l'échange thermique direct recherché. En outre, la projection vers le haut par bulles d'air ne nécessite pas une dépense d'énergie coûteuse et elle permet d'éviter tout système de pompage du liquide de refroidissement. Le liquide de refroidissement et/ou de rinçage peut être n'importe quel liquide approprié, de l'eau, du plomb, du sel liquide, un polymère, de l'huile, et en particulier de l'eau, car tous les inconvénients rencontrés par l'usage de l'eau dans la technique antérieure peuvent être surmontés par le procédé suivant l'invention. Le dispositif se présente donc sous la forme d'un dispositif simple et facile à contrôler et à ajuster et il permet de consommer uniquement des matières non polluantes et peu coûteuses, c'est-à-dire de l'air comprimé et de l'eau de refroidissement.According to an improved embodiment of the invention, the means for projecting the device comprise means for supplying pressurized gas bubbles into a lower part of the tank and means for forcibly guiding bubbles which entrain the liquid upward in the form of curtains of liquid with turbulent upward flow. Preferably use an inert gas with respect to steel, and in particular air. The air bubbles under pressure entrain the coolant and simultaneously make its flow turbulent, which promotes the desired direct heat exchange. In addition, the upward projection by air bubbles does not require an expensive energy expenditure and it makes it possible to avoid any pumping system for the coolant. The coolant and / or rinse aid can be any suitable liquid, water, lead, liquid salt, a polymer, oil, and in particular water, because all the disadvantages encountered by the use of water in the prior art can be overcome by the process according to the invention. The device is therefore in the form of a simple device which is easy to control and adjust and it allows consumption. only non-polluting and inexpensive materials, i.e. compressed air and cooling water.
D'autres particularités relatives au dispositif suivant l'invention sont indiquées dans les revendications données ci-après. D'autres détails de l'invention ressortiront de la description donnée dans la suite, à titre non limitatif et avec référence aux dessins annexés.Other features relating to the device according to the invention are indicated in the claims given below. Other details of the invention will emerge from the description given below, without implied limitation and with reference to the attached drawings.
La figure 1 représente une vue en coupe longitudinale d'un dispositif de refroidissement et/ou de rinçage de fils et/ou rubans d'acier suivant l'invention.FIG. 1 represents a view in longitudinal section of a device for cooling and / or rinsing steel wires and / or ribbons according to the invention.
La figure 2 représente une vue en plan du dessus de la figure 1.FIG. 2 represents a plan view from above of FIG. 1.
Sur les différents dessins, les éléments identiques ou analogues portent les mêmes références. Pour la description des différentes figures on fait référence à un dispositif de refroidissement par eau. Cette description reste applicable au rinçage des fils par un liquide de rinçage ou au refroidissement par tout autre liquide de refroidissement.In the various drawings, identical or similar elements bear the same references. For the description of the various figures, reference is made to a water cooling device. This description remains applicable to the rinsing of the wires by a rinsing liquid or to the cooling by any other coolant.
Sur les figures 1 et 2, on a représenté une cuve 1 contenant de l'eau de refroidissement 2. Au-dessus de cette cuve défile un ou plusieurs fils d'acier 3 suivant un sens de défilement indiqué par la flèche 4. Des moyens d'entraînement en défilement courants sont représentés de manière schématique par les références 23 et 24. L'eau peut être alimentée par une entrée 5 et être évacuée par le haut par un trop-plein 6. Dans la cuve illustrée la hauteur de colonne d'eau est égale à environ 750mm de H20 (7350 Pa). Le trop-plein 6 peut être en communication avec une entrée inférieure 5', par l'intermédiaire d'un échangeur de chaleur non représenté, de manière à mettre l'eau de refroidissement en circulation. La cuve comprend aussi des moyens de projection de rideaux d'eau ascensionnels. Ces moyens de projection comprennent des conduits d'alimentation à air 7 à 9 disposés au fond de la cuve parallèlement l'un à l'autre et transversalement au sens de défilement des fils et/ou rubans. Chacun de ces conduits est relié, au travers d'ouvertures correspondantes dans la cuve et par l'intermédiaire de raccords 10 à 12, à un conduit distributeur 13 alimenté en air sous pression par un ventilateur 14. Sur chaque raccord 10 à 12 est prévue une vanne d'obturation 22 qui permet d'ajuster l'alimentation en air sous pression des conduits 7 à 9 et de les mettre en ou hors service en fonction des besoins. Dans l'exemple illustré, les conduits d'alimentation à air 7 àIn Figures 1 and 2, there is shown a tank 1 containing cooling water 2. Above this tank scrolls one or more steel wires 3 in a direction of travel indicated by the arrow 4. Means current scrolling drive systems are represented schematically by the references 23 and 24. The water can be supplied by an inlet 5 and be discharged from the top by an overflow 6. In the tank illustrated the column height d water is approximately 750mm H 2 0 (7350 Pa). The overflow 6 can be in communication with a lower inlet 5 ′, by means of a heat exchanger not shown, so as to put the cooling water into circulation. The tank also includes means for projecting rising water curtains. These projection means include air supply ducts 7 to 9 arranged at the bottom of the tank parallel to one another and transversely to the direction of travel of the wires and / or ribbons. Each of these conduits is connected, through corresponding openings in the tank and by means of fittings 10 to 12, to a distributor duct 13 supplied with pressurized air by a fan 14. On each fitting 10 to 12 is provided a shut-off valve 22 which makes it possible to adjust the supply of pressurized air to the conduits 7 to 9 and to put them on or off as required. In the example illustrated, the air supply ducts 7 to
9 sont perforés et alimentent donc, dans l'eau de la cuve, des bulles d'air sous pression. Par-dessus chaque conduit 7 à 9, deux plaques de guidage 15 et 16 sont supportées par les parois longitudinales 38 et 39 de la cuve de manière à traverser celle-ci de part en part. A leur extrémité haute, située au-dessus du niveau d'eau, les plaques de guidage sont peu écartées et forment ainsi une mince fente de sortie. A leur extrémité basse, située un peu plus bas que leur conduit d'alimentation à air, les plaques de guidage 15 et 16 présentent un écartement nettement supérieur à celui présenté à leur sommet. Les plaques de guidage forment ainsi une espèce de toiture entre les deux pans de laquelle les bulles sont guidées de manière forcée vers le haut. Avec une pression d'air uniquement légèrement supérieure à la colonne d'eau, dans le cas illustré une pression de l'ordre de 1000 mm de H20 (9806 Pa) par exemple, les bulles d'air entraînent l'eau de la cuve pendant leur ascension et expulsent un rideau d'eau turbulent 17 vers le haut. Au sommet du rideau d'eau, il peut se partager en deux et former deux chutes d'eau turbulentes 18 et 19 que le fil à refroidir doit aussi traverser.9 are perforated and therefore supply pressurized air bubbles in the tank water. Over each conduit 7 to 9, two guide plates 15 and 16 are supported by the longitudinal walls 38 and 39 of the tank so as to pass through it from one side. At their upper end, located above the water level, the guide plates are not far apart and thus form a thin outlet slot. At their lower end, located a little lower than their air supply duct, the guide plates 15 and 16 have a spacing clearly greater than that presented at their top. The guide plates thus form a kind of roof between the two sides of which the bubbles are forcedly guided upwards. With an air pressure only slightly higher than the water column, in the illustrated case a pressure of the order of 1000 mm of H 2 0 (9806 Pa) for example, the air bubbles entrain the water of the tank during their ascent and expel a curtain of turbulent water 17 upwards. At the top of the water curtain, it can be split in two and form two turbulent waterfalls 18 and 19 that the wire to be cooled must also pass through.
Les paires de plaques de guidage 15, 16 peuvent être agencées de manière suffisamment serrée dans leur succession pour que les chutes d'eau de deux rideaux voisins puissent se croiser. De cette manière, le fil défile en continu dans de l'eau, et pourtant il n'y a jamais possibilité de formation d'un film de vapeur d'eau autour du fil.The pairs of guide plates 15, 16 can be arranged sufficiently tightly in their succession so that the waterfalls of two neighboring curtains can cross. Of in this way, the wire runs continuously in water, and yet there is never the possibility of the formation of a film of water vapor around the wire.
On peut envisager dans certains cas, en particulier dans des cuves de rinçage, un couvercle 20 qui ferme la cuve vers le haut et qui présente des déflecteurs 21 pour orienter la direction des chutes d'eau 18 et 19.One can envisage in certain cases, in particular in rinsing tanks, a cover 20 which closes the tank upwards and which presents deflectors 21 to orient the direction of the waterfalls 18 and 19.
Lors du refroidissement d'acier à patenter, il est très important que la température du produit correspondant à la qualité souhaitée soit rapidement atteinte et cela, avant de pénétrer dans les courbes de transformation en S de l'acier, bien connues, appelées courbes TTT (transformation, température, temps), afin que celles-ci puissent être traversées selon une isotherme. Lors du patentage des fils avec un dispositif de refroidissement tel qu'illustré, qui peut comprendre 20 rideaux, dont seuls dix sont mis en service, les fils sont rapidement refroidis par ces dix premiers rideaux jusqu'à une température inférieure à la température austénitique et supérieure à la température martensitique, en particulier entre 500 et 680°C, par exemple de l'ordre de 580°C.When cooling steel to be patented, it is very important that the temperature of the product corresponding to the desired quality is quickly reached, before entering the well-known S-transformation curves for steel, called TTT curves. (transformation, temperature, time), so that they can be crossed in an isotherm. When patenting the wires with a cooling device as illustrated, which may include 20 curtains, of which only ten are put into service, the wires are rapidly cooled by these first ten curtains to a temperature below the austenitic temperature and higher than the martensitic temperature, in particular between 500 and 680 ° C., for example of the order of 580 ° C.
A cette température, les fils se trouvent en face du nez des courbes en S, c'est-à-dire à une température correspondant au temps d'incubation minimum, pour passer à travers ces courbes, ce qui permet d'éviter des perturbations qui pourraient influencer la structure de l'acier.At this temperature, the wires are located opposite the nose of the S-curves, that is to say at a temperature corresponding to the minimum incubation time, to pass through these curves, which makes it possible to avoid disturbances that could influence the structure of the steel.
De cette manière le refroidissement rapide obtenu par les rideaux d'eau a été arrêté à la température voulue, qui est atteinte en fonction du nombre de rideaux mis en service.In this way the rapid cooling obtained by the water curtains was stopped at the desired temperature, which is reached depending on the number of curtains put into service.
Avec le dispositif décrit, si l'on désire une trempe martensitique de l'acier, il suffit d'augmenter le nombre de rideaux à traverser. Au cours d'un patentage, on diminuera ou on augmentera le nombre de rideaux à mettre en service par exemple si les fils à traiter ont un diamètre plus petit ou plus grand ou si leur défilement est plus lent ou plus rapide, pour une raison quelconque. II doit être entendu que la présente invention n'est en aucune façon limitée aux formes de réalisation décrites ci-dessus et que bien des modifications peuvent y être apportées sans sortir du cadre des revendications données ci-après. With the device described, if a martensitic quenching of the steel is desired, it is sufficient to increase the number of curtains to be crossed. During a patenting, the number of curtains to be put into service will be reduced or increased, for example if the wires to be treated have a smaller or larger diameter or if their movement is slower or faster, for whatever reason . It should be understood that the present invention is in no way limited to the embodiments described above and that many modifications can be made thereto without departing from the scope of the claims given below.
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE200200373 | 2002-06-06 | ||
| BE2002/0373A BE1014869A3 (en) | 2002-06-06 | 2002-06-06 | Cooling and / or flushing son and / or |
| PCT/BE2003/000101 WO2003104500A1 (en) | 2002-06-06 | 2003-06-05 | Device for cooling and/or rinsing steel wires and/or tapes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1520051A1 true EP1520051A1 (en) | 2005-04-06 |
| EP1520051B1 EP1520051B1 (en) | 2011-02-23 |
Family
ID=29721152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03756922A Expired - Lifetime EP1520051B1 (en) | 2002-06-06 | 2003-06-05 | Device for cooling and/or rinsing steel wires and/or tapes |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US7404923B2 (en) |
| EP (1) | EP1520051B1 (en) |
| JP (1) | JP4471833B2 (en) |
| CN (1) | CN100370037C (en) |
| AT (1) | ATE499454T1 (en) |
| AU (1) | AU2003249792A1 (en) |
| BE (1) | BE1014869A3 (en) |
| CA (1) | CA2488229C (en) |
| DE (1) | DE60336137D1 (en) |
| ES (1) | ES2358037T3 (en) |
| WO (1) | WO2003104500A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018130499A1 (en) * | 2017-01-12 | 2018-07-19 | Nv Bekaert Sa | Method and equipment for controlled patenting of steel wire |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1015255A3 (en) * | 2002-12-18 | 2004-12-07 | Four Industriel Belge | Method and device for stripping the son and / or metal bands. |
| JP5593918B2 (en) * | 2010-07-26 | 2014-09-24 | 新日鐵住金株式会社 | Scale recovery method and steel heat treatment furnace using the same |
| RS61211B1 (en) * | 2015-06-02 | 2021-01-29 | Pacific Green Technologies Inc | Multi-level gas scrubber with multiple flooded scrubber heads |
| LU100329B1 (en) * | 2017-06-28 | 2019-01-08 | Arcelormittal Bissen & Bettembourg | Galvanized wire cooling device |
| CN108435822A (en) * | 2018-03-30 | 2018-08-24 | 马鞍山法尔盛科技有限公司 | A kind of stokehold steel wire surface cleaning plant and cleaning technology |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR832391A (en) | 1937-05-27 | 1938-09-26 | & Commerciale Des Aciers Soc I | Metal hooping wires |
| US3734109A (en) * | 1971-03-08 | 1973-05-22 | P Hebner | Spray cleaning system |
| US3997376A (en) * | 1974-06-19 | 1976-12-14 | Midland-Ross Corporation | Spray mist cooling method |
| US4270317A (en) * | 1978-10-10 | 1981-06-02 | Midland-Ross Corporation | Apparatus used in the treatment of a continuous strip of metal and method of use thereof |
| JPS6070126A (en) * | 1983-09-27 | 1985-04-20 | Nippon Kokan Kk <Nkk> | Apparatus for cooling underside of metallic plate |
| GB8523882D0 (en) | 1985-09-27 | 1985-10-30 | Bekaert Sa Nv | Treatment of steel wires |
| DE4033867C2 (en) * | 1990-10-22 | 1993-11-11 | Mannesmann Ag | Process for pickling tapes |
| ZA924360B (en) | 1991-07-22 | 1993-03-31 | Bekaert Sa Nv | Heat treatment of steel wire |
| WO1997044498A1 (en) * | 1996-05-23 | 1997-11-27 | Nippon Steel Corporation | Widthwise uniform cooling system for steel strip in continuous steel strip heat treatment step |
| IT1302912B1 (en) * | 1998-12-10 | 2000-10-10 | Ct Sviluppo Materiali Spa | ACCELERATED PROCEDURE FOR THE PICKLING OF STEEL TAPES AND DEVICE TO REALIZE IT. |
-
2002
- 2002-06-06 BE BE2002/0373A patent/BE1014869A3/en not_active IP Right Cessation
-
2003
- 2003-06-05 AT AT03756922T patent/ATE499454T1/en not_active IP Right Cessation
- 2003-06-05 AU AU2003249792A patent/AU2003249792A1/en not_active Abandoned
- 2003-06-05 CN CNB038129868A patent/CN100370037C/en not_active Expired - Fee Related
- 2003-06-05 JP JP2004511558A patent/JP4471833B2/en not_active Expired - Fee Related
- 2003-06-05 ES ES03756922T patent/ES2358037T3/en not_active Expired - Lifetime
- 2003-06-05 WO PCT/BE2003/000101 patent/WO2003104500A1/en not_active Ceased
- 2003-06-05 EP EP03756922A patent/EP1520051B1/en not_active Expired - Lifetime
- 2003-06-05 US US10/516,593 patent/US7404923B2/en not_active Expired - Lifetime
- 2003-06-05 DE DE60336137T patent/DE60336137D1/en not_active Expired - Lifetime
- 2003-06-05 CA CA2488229A patent/CA2488229C/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03104500A1 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018130499A1 (en) * | 2017-01-12 | 2018-07-19 | Nv Bekaert Sa | Method and equipment for controlled patenting of steel wire |
| CN110191969A (en) * | 2017-01-12 | 2019-08-30 | 贝卡尔特公司 | Method and apparatus for controlled sorbitization of steel wire |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003249792A1 (en) | 2003-12-22 |
| CA2488229C (en) | 2011-01-25 |
| CN100370037C (en) | 2008-02-20 |
| CA2488229A1 (en) | 2003-12-18 |
| WO2003104500A1 (en) | 2003-12-18 |
| EP1520051B1 (en) | 2011-02-23 |
| US7404923B2 (en) | 2008-07-29 |
| DE60336137D1 (en) | 2011-04-07 |
| ES2358037T3 (en) | 2011-05-05 |
| US20050173848A1 (en) | 2005-08-11 |
| JP2005529234A (en) | 2005-09-29 |
| ATE499454T1 (en) | 2011-03-15 |
| CN1659291A (en) | 2005-08-24 |
| JP4471833B2 (en) | 2010-06-02 |
| BE1014869A3 (en) | 2004-05-04 |
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