EP0006841B1 - Apparatus for the continuous heat treatment of metal products - Google Patents
Apparatus for the continuous heat treatment of metal products Download PDFInfo
- Publication number
- EP0006841B1 EP0006841B1 EP79930011A EP79930011A EP0006841B1 EP 0006841 B1 EP0006841 B1 EP 0006841B1 EP 79930011 A EP79930011 A EP 79930011A EP 79930011 A EP79930011 A EP 79930011A EP 0006841 B1 EP0006841 B1 EP 0006841B1
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- European Patent Office
- Prior art keywords
- quenching
- bath
- preheating
- ladle
- wire
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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
- 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
- C21D9/64—Patenting furnaces
-
- 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
- C21D9/62—Continuous furnaces for strip or wire with direct resistance heating
Definitions
- the present invention relates to a device for the continuous heat treatment of elongated metal material, in particular wire.
- the systems used for this generally consist of a preheating bath, usually a lead bath, which heats the wire passed through to 450-550 ° C.
- This preheating bath which is brought to the temperature required for this by any means, is followed by a similar bath as a quench bath.
- Both baths are connected to a transformer, so that the wire, which is guided through the liquid metal quantities, is heated on the path that it runs freely between the two baths, using its ohmic resistance.
- glow path the temperature of about 1,000 ° C required for austenitization, which is well above Ac 3, is reached within a very short time.
- DE-V-1.167.866 describes a device for the heat treatment of wires or strips by electrical resistance heating by means of heatable contact baths, in particular lead baths, one serving as a quench bath.
- heatable contact baths in particular lead baths, one serving as a quench bath.
- On the wall side of the quench bath facing the upstream contact bath are well heat-conducting and electrically insulated hollow ribs or tubes projecting into the contact bath, which enable heat transfer from the quench bath to the contact bath.
- the aim of the present invention was therefore to provide a device which, on the one hand, maintains ohmic resistance heating of the wire to be patented which can be carried out easily and, on the other hand, significantly reduces the high energy expenditure which occurs in this known process.
- this aim is achieved by a device which generally understands two pans filled with liquid metal, preferably lead, one of which is designed as a preheating pan and the other as a quenching pan and which are both connected to the secondary winding of a transformer and which are characterized by this that the preheating pan is arranged to be partially immersed in the quenching pan, the jacket of the preheating pan being completely electrically insulated from the liquid metal of the quenching pan with the highest possible heat permeability.
- the quenching pan is equipped with a pump unit. If the capacity of the quenching pan exceeds that of the preheating pan by more than twice, the installation of a pump unit is recommended.
- a conventional device that is suitable for circulating metal baths can serve as the pump unit.
- the continuous circulation of the liquid metal in the quenching pan serves on the one hand to transport thermal energy into the immediate vicinity of the jacket of the preheating pan and on the other hand to avoid overheating in the wire entry zone.
- the for glowing and austenitizing the The wire required energy, which almost completely passes to the quenching bath in the course of the subsequent sorbitization, is therefore used according to the invention for heating the preheating bath, since the preheating pan is almost completely washed around by the liquid metal which is located in the quenching pan, as a result of which one the shown prior art enlargement of the contact area and thus an improvement in the possibility of smooth heat transfer are given.
- the quenching pan is equipped with a combined heating and cooling unit.
- the role of this unit is to establish the necessary temperature conditions when starting up the system or to derive any excess thermal energy at any time.
- the device according to the invention makes it possible to always keep the preheating bath at a sufficiently high temperature without additional external energy supply.
- the conditions necessary for the formation of the desired sorbitol structure namely a homogeneous temperature of 500-550 ° C., prevail and that the thermal energy given off by the glowing wire to the quenching bath is used sensibly.
- energy savings of up to 50% can be achieved in this way.
- the quenching pan is made as elongated as possible.
- the quenching pan can also provide for the quenching pan to be divided into two compartments on the one hand by a dam, or to use two separate quenching pans, one of which contains the preheating pan and is connected to the other via flow channels.
- the shells of the pans are expediently made of steel. It is possible to use an insulation layer in the form of a composite material when designing the jacket of the preheating pan. However, it is also possible to provide a sandwich construction in which an insulating layer, preferably made of ceramic material, is embedded between two steel jackets.
- Fig. 1 shows an embodiment with a schematic arrangement of preheating and quenching pan to each other
- Fig. 2 shows an embodiment with the quenching pan in an elongated form.
- Fig. 1 a distinction is made between the pans with the preheating bath (10) and the quenching bath (20).
- the jacket of the preheating pan (11) rests on the supports (13). It is equipped with an internal insulation (12), which electrically insulates the preheating bath (10) and the quenching bath (20) and only allows a transfer of thermal energy.
- the jacket of the preheating pan (11) and the jacket of the quenching pan (21) are connected to the secondary winding (31) of the transformer (30).
- the metal baths (10) and (20) thus act as electrical contact baths for the wire (1) passed in the direction of the arrow.
- the wire path (G) provided with dots corresponds to the glow path within which the wire is rapidly heated to approximately 1,000 ° C.
- the combined heating and cooling unit (22) Inside the quenching bath (20) is the combined heating and cooling unit (22), which is actuated when the device is started up and when excess energy is removed.
- the wire (1) After passing through the preheating bath (10) and the annealing section (G), the wire (1) passes through the quenching bath (20) in the opposite direction and then passes through the circulating air-cooled section (40).
- FIG. 2 shows the design of the device according to the invention with the quenching pan in a stretched form.
- a pump unit (23) for transporting thermal energy into the immediate vicinity of the preheating pan is additionally provided.
- the wire is always routed in the same direction.
- the pump unit (23) acts in the opposite direction to the wire feed.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Vorrichtung zum kontinuierlichen Wärmebehandeln von langgestrecktem Metallgut, insbesondere von Draht.The present invention relates to a device for the continuous heat treatment of elongated metal material, in particular wire.
Eine der gebräuchlichen Arten der Wärmebehandlung von Draht ist das Patentieren, durch welches das Drahtgefüge über eine Austenitisierung möglichst vollständig in ein Sorbitgefüge überführt werden soll.One of the common types of heat treatment of wire is patenting, through which the wire structure is to be converted as completely as possible into a sorbitol structure via austenitization.
Bereits im Jahre 1930 ist mit Erfolg versucht worden das klassische Patentieren, bei welchem die Erwärmung des Drahtes auf die erforderliche Patentierungstemperatur in einen beheizten Ofenteil durch Strahlung erfolgt und demzufolge insbesondere bei dicken Drahtabmessungen eine verhältnismässig lange Aufenthaltszeit des Drahtes in den Anlagen erfordert, durch ein elektrisches Patentierverfahren zu ersetzen, bei welchem der Draht einer unmittelbaren Widerstandserhitzung unterworfen wird.Already in 1930 the classic patenting was tried with success, in which the heating of the wire to the required patenting temperature in a heated part of the furnace was carried out by radiation and consequently, especially in the case of thick wire dimensions, a relatively long residence time of the wire in the systems, by an electrical one To replace a patenting process in which the wire is subjected to an immediate resistance heating.
Die hierfür gebräuchlichen Anlagen bestehen generell aus einem Vorwärmbad, zumeist einem Bleibad, das den durchgeleiteten Draht auf 450-550 °C aufheizt. Diesem Vorwärmbad, das durch beliebige Mittel auf die hierzu notwendige Temperatur gebracht wird, ist ein ähnliches Bad als Abschreckbad nachgeschaltet. Beide Bäder sind mit einem Transformator verbunden, so dass der durch die flüssigen Metallmengen geleitete Draht auf der Strecke, die er zwischen beiden Bädern frei durchläuft, unter Ausnutzung seines Ohm'schen Widerstands aufgeheizt wird. Durch gezielte Wahl der Transformatorenleistung, sowie der Länge der vom Draht durchlaufenen freien Strecke - der sog. Glühstrecke - wird innerhalb kürzester Zeit die zur Austenitisierung erforderliche Temperatur von etwa 1 000 °C, die deutlich oberhalb Ac3 liegt, erreicht. Beim nachfolgenden Durchlaufen des Drahtes durch das Abschreckbad, in welchem der Draht auf rund 500 °C abgekühlt und während etwa 20 Sek. auf dieser Temperatur gehalten wird, erfolgt die Ausbildung des gewünschten feinkörnigen Sorbitgefüges.The systems used for this generally consist of a preheating bath, usually a lead bath, which heats the wire passed through to 450-550 ° C. This preheating bath, which is brought to the temperature required for this by any means, is followed by a similar bath as a quench bath. Both baths are connected to a transformer, so that the wire, which is guided through the liquid metal quantities, is heated on the path that it runs freely between the two baths, using its ohmic resistance. Through targeted selection of the transformer power and the length of the free path through which the wire travels - the so-called glow path - the temperature of about 1,000 ° C required for austenitization, which is well above Ac 3, is reached within a very short time. When the wire subsequently passes through the quench bath, in which the wire is cooled to around 500 ° C. and held at this temperature for about 20 seconds, the desired fine-grained sorbitol structure is formed.
Während erhebliche Energiemengen zur Beheizung des Vorwärmebades benötigt werden, muss die durch den glühenden Draht in das Abschreckbad eingeführte thermische Energie wieder abgeführt werden, was einen weiteren energetischen und technischen Aufwand erforderlich macht. So beschreibt die DE-V-1.167.866 eine Vorrichtung zum Wärmebehandeln von Drähten oder Bändern durch elektrische Widerstandserhitzung vermittels aufheizbarer Kontaktbäder, insbesondere Bleibäder, wobei eines als Abschreckbad dient. An der dem vorgeschalteten Kontaktbad zugekehrten Wandseite des Abschreckbades sind gut wärmeleitende und elektrisch isolierte, in das Kontaktbad hineinragende Hohlrippen oder Rohre angeordnet, die einen Wärmeübergang vom Abschreckbad in das Kontaktbad ermöglichen.While considerable amounts of energy are required to heat the preheating bath, the thermal energy introduced into the quenching bath by the glowing wire has to be dissipated again, which requires further energetic and technical effort. For example, DE-V-1.167.866 describes a device for the heat treatment of wires or strips by electrical resistance heating by means of heatable contact baths, in particular lead baths, one serving as a quench bath. On the wall side of the quench bath facing the upstream contact bath are well heat-conducting and electrically insulated hollow ribs or tubes projecting into the contact bath, which enable heat transfer from the quench bath to the contact bath.
Obwohl diese Anordnung deutliche Vorteile hinsichtlich den aufzuwendenden Energiemengen mit sich bringt, bleibt die Möglichkeit des Wärmeüberganges hier auf eine relativ geringe Kontaktfläche und zwar die Hohlrippen aufweisende Wandfläche begrenzt. Das elektrische Widerstandspatentieren verbraucht in der Tat mehr Energie zum Betreiben der Metallbäder, als zum eigentlichen Widerstandserhitzen des Drahtes.Although this arrangement brings clear advantages with regard to the amounts of energy to be used, the possibility of heat transfer here remains limited to a relatively small contact area, namely the wall surface having the hollow ribs. Electrical resistance patenting actually consumes more energy to operate the metal baths than to actually heat the wire.
Es ist versucht worden, den Energieverbrauch dadurch zu senken, dass man den Draht durch Erhitzen in mindestens einem elektrischen Induktionsofen austenitisierte und eine einziges Metallbad gleichzeitig als Vorwärm-, sowie als Abschreckbad benutzte. Der Vorteil dieses Verfahrens, das in der Tat eine Senkung des gesamten Energieverbrauchs mit sich bringt, wird allerdings durch einen schwerwiegenden Nachteil wieder aufgehoben und zwar ist es erwiesenermassen nicht möglich, Drähte von einem Durchmesser oberhalb 3 mm problemlos durch einen Induktionsofen zu leiten, wenn man gleichzeitig die Aufheizgeschwindigkeit im Ofen und die Geschwindigkeit des Drahtvorschubs mit den metallurgischen Erfordernissen des Patentiervorgangs im Einklang halten muss.Attempts have been made to reduce the energy consumption by austenitizing the wire by heating in at least one electric induction furnace and using a single metal bath at the same time as a preheating and quenching bath. However, the advantage of this method, which in fact brings about a reduction in the total energy consumption, is offset by a serious disadvantage, and it has been proven that it is not possible to pass wires with a diameter above 3 mm through an induction furnace without problems if one is at the same time the heating speed in the furnace and the speed of the wire feed must be in line with the metallurgical requirements of the patenting process.
Das Ziel der vorliegenden Erfindung bestand demnach darin, eine Vorrichtung zu schaffen, die einerseits bequem durchführbare Ohm'sche Widerstandsaufheizung des zu patentierenden Drahtes beibehält und die andererseits den bei diesem an sich bekannten Verfahren auftretenden hohen Energieaufwand deutlich reduziert.The aim of the present invention was therefore to provide a device which, on the one hand, maintains ohmic resistance heating of the wire to be patented which can be carried out easily and, on the other hand, significantly reduces the high energy expenditure which occurs in this known process.
Erfindungsgemäss wird dieses Ziel erreicht durch eine Vorrichtung, die generell zwei mit flüssigem Metall, vorzugsweise Blei, gefüllte Pfannen begreift, von denen eine als Vorwärmepfanne und die andere als Abschreckpfanne ausgebildet ist und die beide mit der Sekundärwicklung eines Transformators verbunden sind und die dadurch gekennzeichnet ist, dass die Vorwärmepfanne in der Abschreckpfanne teilweise eintauchend angeordnet ist, wobei der Mantel der Vorwärmepfanne gegenüber dem flüssigen Metall der Abschreckpfanne bei einer möglichst hohen Wärmedurchlässigkeit eine vollkommene elektrische Isolierung aufweist.According to the invention, this aim is achieved by a device which generally understands two pans filled with liquid metal, preferably lead, one of which is designed as a preheating pan and the other as a quenching pan and which are both connected to the secondary winding of a transformer and which are characterized by this that the preheating pan is arranged to be partially immersed in the quenching pan, the jacket of the preheating pan being completely electrically insulated from the liquid metal of the quenching pan with the highest possible heat permeability.
Gemäss einer bevorzugten Ausführungsform ist die Abschreckpfanne mit einem Pumpaggregat ausgerüstet. Uebersteigt die Kapazität der Abschreckpfanne die der Vorwärmepfanne um mehr als das Doppelte, so ist der Einbau eines Pumpaggregates jedenfalls zu empfehlen.According to a preferred embodiment, the quenching pan is equipped with a pump unit. If the capacity of the quenching pan exceeds that of the preheating pan by more than twice, the installation of a pump unit is recommended.
Als Pumpaggregat kann ein konventionelles Gerät dienen, das für das Umwälzen von Metallbädern geeignet ist. Das laufende Umwälzen des flüssigen Metalls in der Abschreckpfanne dient einerseits zum Transport thermischer Energie in die unmittelbare Umgebung des Mantels der Vorwärmepfanne und andererseits zum Vermeiden von Ueberhitzungserscheinungen in der Drahteintrittszone.A conventional device that is suitable for circulating metal baths can serve as the pump unit. The continuous circulation of the liquid metal in the quenching pan serves on the one hand to transport thermal energy into the immediate vicinity of the jacket of the preheating pan and on the other hand to avoid overheating in the wire entry zone.
Die zum Glühen und Austenitisieren des Drahtes benötigte Energie, die im Verlauf des nachfolgenden Sorbitisierens nahezu vollständig an das Abschreckbad übergeht, wird erfindungsgemäss also zum Aufheizen des Vorwärmebades verwendet, da die Vorwärmepfanne von dem flüssigen Metall, das sich in der Abschreckpfanne befindet, nahezu, ganz umspült wird, wodurch eine gegenüber dem aufgezeigten Stand der Technik erzielte Vergrösserung der Kontaktfläche und hiermit eine Verbesserung der Möglichkeit eines glatten Wärmeüberganges gegeben sind.The for glowing and austenitizing the The wire required energy, which almost completely passes to the quenching bath in the course of the subsequent sorbitization, is therefore used according to the invention for heating the preheating bath, since the preheating pan is almost completely washed around by the liquid metal which is located in the quenching pan, as a result of which one the shown prior art enlargement of the contact area and thus an improvement in the possibility of smooth heat transfer are given.
Gegebenenfalls wird die Abschreckpfanne mit einem kombinierten Heiz-Kühlaggregat ausgerüstet. Die Rolle dieses Aggregates besteht darin, die notwendigen Temperaturverhältnisse beim Anfahren der Anlage herzustellen, bzw. etwaige überschüssige thermische Energiemengen jederzeit abzuleiten.If necessary, the quenching pan is equipped with a combined heating and cooling unit. The role of this unit is to establish the necessary temperature conditions when starting up the system or to derive any excess thermal energy at any time.
Durch die erfindungsgemässe Vorrichtung wird es ermöglicht das Vorwärmebad ohne zusätzliche äussere Energiezufuhr stets auf einer genügend hohen Temperatur zu halten. Dazu erreicht man, dass im Abschreckbad die zur Ausbildung des gewünschten Sorbitgefüges notwendigen Bedingungen, nämlich eine homogene Temperatur von 500-550 °C herrscht und dass die durch den glühenden Draht an das Abschreckbad abgegebene thermische Energie sinnvoll genutzt wird. Gegenüber konventionellen Widerstandspatentieranlagen lässt sich auf diese Weise eine Energieersparnis von bis zu 50% erreichen.The device according to the invention makes it possible to always keep the preheating bath at a sufficiently high temperature without additional external energy supply. In addition, it is achieved that the conditions necessary for the formation of the desired sorbitol structure, namely a homogeneous temperature of 500-550 ° C., prevail and that the thermal energy given off by the glowing wire to the quenching bath is used sensibly. Compared to conventional resistance patent systems, energy savings of up to 50% can be achieved in this way.
Werden die Ausmasse des Abschreckbades so gross, dass sie diejenigen des Vorwärmebades um das Doppelte überschreiten, so kann man vorsehen, die Abschreckpfanne in möglichst langgestreckter Form auszuführen. In einer konsequenten Weiterführung dieses Baukonzepts kann man auch vorsehen, die Abschreckpfanne einerseits durch eine Staumauer in zwei Abteile zu unterteilen oder andererseits zwei getrennte Abschreckpfannen einzusetzen, deren eine die Vorwärmepfanne enthält und mit der anderen über Durchflusskanäle verbunden ist.If the dimensions of the quenching bath are so large that they double those of the preheating bath, it can be provided that the quenching pan is made as elongated as possible. In a consistent continuation of this construction concept, one can also provide for the quenching pan to be divided into two compartments on the one hand by a dam, or to use two separate quenching pans, one of which contains the preheating pan and is connected to the other via flow channels.
Die Mäntel der Pfannen bestehen zweckmässigerweise aus Stahl. Es ist möglich bei der Ausführung des Mantels der Vorwärmepfanne eine Isolationsschicht in Form eines Verbundmaterials einzuzetzen. Man kann jedoch auch eine Sandwich-Konstruktion vorsehen, in der zwischen zwei Stahlmänteln eine Isolierschicht vorzugsweise aus keramischem Material eingebettet ist.The shells of the pans are expediently made of steel. It is possible to use an insulation layer in the form of a composite material when designing the jacket of the preheating pan. However, it is also possible to provide a sandwich construction in which an insulating layer, preferably made of ceramic material, is embedded between two steel jackets.
Die Abbildungen zeigen schematische Darstellungen von zwei bevorzugten Ausführungen der erfindungsgemässen Vorrichtung.The figures show schematic representations of two preferred embodiments of the device according to the invention.
Fig. 1 zeigt eine Ausführung mit schematischer Anordnung von Vorwärme- und Abschreckpfanne zueinander, und Fig. 2 zeigt eine Ausführung mit der Abschreckpfanne in gestreckter Form.Fig. 1 shows an embodiment with a schematic arrangement of preheating and quenching pan to each other, and Fig. 2 shows an embodiment with the quenching pan in an elongated form.
In Fig. 1 unterscheidet man die ineinander angeordneten Pfannen mit dem Vorwärmebad (10) und dem Abschreckbad (20). Der Mantel der Vorwärmepfanne (11) ruht auf den Stützen (13). Er ist mit einer inneren Isolierung (12) ausgestattet, die das Vorwärmebad (10) und das Abschreckbad (20) elektrisch voneinander isoliert und lediglich einen Uebergang thermischer Energie gestattet.In Fig. 1 a distinction is made between the pans with the preheating bath (10) and the quenching bath (20). The jacket of the preheating pan (11) rests on the supports (13). It is equipped with an internal insulation (12), which electrically insulates the preheating bath (10) and the quenching bath (20) and only allows a transfer of thermal energy.
Der Mantel der Vorwärmepfanne (11), sowie der Mantel der Abschreckpfanne (21) sind mit der Sekundärwicklung (31) des Transformators (30) verbunden. Die Metallbäder (10) und (20) wirken somit als elektrische Kontaktbäder für den in der Pfeilrichtung hindurchgeleiteten Draht (1). Die mit Punkten versehene Drahtstrecke (G) entspricht der Glühstrecke innerhalb derer der Draht rasch auf etwa 1 000 °C aufgeheizt wird.The jacket of the preheating pan (11) and the jacket of the quenching pan (21) are connected to the secondary winding (31) of the transformer (30). The metal baths (10) and (20) thus act as electrical contact baths for the wire (1) passed in the direction of the arrow. The wire path (G) provided with dots corresponds to the glow path within which the wire is rapidly heated to approximately 1,000 ° C.
Im Inneren des Abschreckbades (20) befindet sich das kombinierte Heiz-Kühlaggregat (22), das beim Anfahren der Vorrichtung, sowie beim Abführen überschüssiger Energiemengen betätigt wird.Inside the quenching bath (20) is the combined heating and cooling unit (22), which is actuated when the device is started up and when excess energy is removed.
Nach dem Durchgang durch das Vorwärmebad (10) und die Glühstrecke (G) durchläuft der Draht (1) das Abschreckbad (20) in der entgegengesetzten Richtung und durchläuft abschliessend die umluftgekühlte Strecke (40).After passing through the preheating bath (10) and the annealing section (G), the wire (1) passes through the quenching bath (20) in the opposite direction and then passes through the circulating air-cooled section (40).
Fig. 2 zeigt die Ausführung der erfindungsgemässen Vorrichtung mit der Abschreckpfanne in gestreckter Form. Hierbei wird zusätzlich ein Pumpaggregat (23) zum Transport von thermischer Energie in die unmittelbare Umgebung der Vorwärmepfanne vorgesehen.2 shows the design of the device according to the invention with the quenching pan in a stretched form. A pump unit (23) for transporting thermal energy into the immediate vicinity of the preheating pan is additionally provided.
Die Drahtführung erfolgt stets in der gleichen Richtung. Demzufolge wirkt das Pumpaggregat (23) hier in entgegengesetzter Richtung zum Drahtvorschub.The wire is always routed in the same direction. As a result, the pump unit (23) acts in the opposite direction to the wire feed.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT79930011T ATE102T1 (en) | 1978-07-03 | 1979-06-26 | DEVICE FOR CONTINUOUS HEAT TREATMENT OF METAL GOODS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU79911 | 1978-07-03 | ||
| LU79911A LU79911A1 (en) | 1978-07-03 | 1978-07-03 | DEVICE FOR CONTINUOUS HEAT TREATMENT OF METAL GOODS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0006841A2 EP0006841A2 (en) | 1980-01-09 |
| EP0006841A3 EP0006841A3 (en) | 1980-01-23 |
| EP0006841B1 true EP0006841B1 (en) | 1981-07-08 |
Family
ID=19728949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP79930011A Expired EP0006841B1 (en) | 1978-07-03 | 1979-06-26 | Apparatus for the continuous heat treatment of metal products |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4249720A (en) |
| EP (1) | EP0006841B1 (en) |
| JP (1) | JPS5822526B2 (en) |
| AT (1) | ATE102T1 (en) |
| AU (1) | AU521204B2 (en) |
| CS (1) | CS209814B2 (en) |
| DE (1) | DE2960456D1 (en) |
| LU (1) | LU79911A1 (en) |
| PL (1) | PL116624B1 (en) |
| SU (1) | SU993826A3 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS549643B2 (en) * | 1975-02-04 | 1979-04-26 | ||
| FR2607519B1 (en) * | 1986-11-27 | 1989-02-17 | Michelin & Cie | METHOD AND DEVICE FOR HEAT TREATING A STEEL WIRE |
| KR100445769B1 (en) * | 1995-11-30 | 2004-10-15 | 킴벌리-클라크 월드와이드, 인크. | Superfine Microfiber Nonwoven Web |
| DE102005054014B3 (en) | 2005-11-10 | 2007-04-05 | C.D. Wälzholz-Brockhaus GmbH | Method for continuously forming bainite structure in carbon steel involves austenitizing steel and passing it through bath quenchant, removing quenchant residue converting remaining parts of steel into bainite isothermal tempering station |
| US9004327B2 (en) * | 2012-08-31 | 2015-04-14 | Wfk & Associates, Llc | Insertion guide for animal footwear |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2300329A (en) * | 1938-02-18 | 1942-10-27 | William H Wood | Method of heat treating steel wire and apparatus therefor |
| GB560599A (en) * | 1942-05-01 | 1944-04-12 | William Harry Wood | Improved apparatus for the heat treatment of metal wire, strip and the like |
| US2463412A (en) * | 1942-07-25 | 1949-03-01 | John S Nachtman | Electric resistance heat-treating of electroplated coatings |
| FR948545A (en) * | 1946-07-09 | 1949-08-03 | Improvements in the heat treatment of metal wires | |
| DE1167866B (en) * | 1959-10-31 | 1964-04-16 | Siemens Ag | Device for the heat treatment of wires or tapes by means of electrical resistance heating |
| GB985022A (en) * | 1960-04-28 | 1965-03-03 | British Iron Steel Research | Improvements in or relating to the continuous heat treatment of elongate metal material |
| LU40026A1 (en) * | 1960-04-28 | 1961-06-15 | ||
| DE1205572B (en) * | 1962-03-30 | 1965-11-25 | Schloemann Ag | Vacuum annealing tower with an annealing and a cooling section for continuous heat treatment of endless metal strips |
| NL6513832A (en) * | 1964-10-28 | 1966-04-29 | ||
| US3277270A (en) * | 1965-04-09 | 1966-10-04 | Oscar C Trautman | Continuous heat treating of strapping and the like |
| DE1583406C3 (en) * | 1967-11-15 | 1974-07-25 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Arrangement for the heat treatment of strand material by means of electrical resistance heating |
| BE793716A (en) * | 1972-01-06 | 1973-07-05 | Procedes Ind S E P R I S A Soc | METAL WIRE PATENTAGE PROCESS AND TANK |
| US4168995A (en) * | 1973-04-20 | 1979-09-25 | December 4 Drotmuvek | Steel wire patenting process |
-
1978
- 1978-07-03 LU LU79911A patent/LU79911A1/en unknown
-
1979
- 1979-06-26 DE DE7979930011T patent/DE2960456D1/en not_active Expired
- 1979-06-26 AT AT79930011T patent/ATE102T1/en not_active IP Right Cessation
- 1979-06-26 EP EP79930011A patent/EP0006841B1/en not_active Expired
- 1979-06-28 CS CS794483A patent/CS209814B2/en unknown
- 1979-07-02 JP JP54083851A patent/JPS5822526B2/en not_active Expired
- 1979-07-02 SU SU792783156A patent/SU993826A3/en active
- 1979-07-02 US US06/055,190 patent/US4249720A/en not_active Expired - Lifetime
- 1979-07-02 PL PL1979216796A patent/PL116624B1/en unknown
- 1979-07-03 AU AU48602/79A patent/AU521204B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0006841A2 (en) | 1980-01-09 |
| US4249720A (en) | 1981-02-10 |
| AU521204B2 (en) | 1982-03-18 |
| EP0006841A3 (en) | 1980-01-23 |
| CS209814B2 (en) | 1981-12-31 |
| SU993826A3 (en) | 1983-01-30 |
| ATE102T1 (en) | 1981-07-15 |
| AU4860279A (en) | 1980-02-07 |
| PL216796A1 (en) | 1980-03-24 |
| LU79911A1 (en) | 1980-02-14 |
| JPS5514891A (en) | 1980-02-01 |
| DE2960456D1 (en) | 1981-10-15 |
| JPS5822526B2 (en) | 1983-05-10 |
| PL116624B1 (en) | 1981-06-30 |
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