EP1830147A1 - Four continu à chambres multiples avec atmosphère protectrice et procédé pour le chauffage de pièces galvanisées sans couche oxydée - Google Patents

Four continu à chambres multiples avec atmosphère protectrice et procédé pour le chauffage de pièces galvanisées sans couche oxydée Download PDF

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Publication number
EP1830147A1
EP1830147A1 EP06004360A EP06004360A EP1830147A1 EP 1830147 A1 EP1830147 A1 EP 1830147A1 EP 06004360 A EP06004360 A EP 06004360A EP 06004360 A EP06004360 A EP 06004360A EP 1830147 A1 EP1830147 A1 EP 1830147A1
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EP
European Patent Office
Prior art keywords
workpiece
furnace
continuous furnace
protective gas
heating
Prior art date
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EP06004360A
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German (de)
English (en)
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EP1830147B1 (fr
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Rolf-Josef Schwartz
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Priority to ES06004360T priority Critical patent/ES2383964T3/es
Priority to EP06004360A priority patent/EP1830147B1/fr
Priority to AT06004360T priority patent/ATE553344T1/de
Publication of EP1830147A1 publication Critical patent/EP1830147A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • C21D1/763—Adjusting the composition of the atmosphere using a catalyst
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • 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
    • C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
    • 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
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/045—Furnaces with controlled atmosphere
    • F27B9/047—Furnaces with controlled atmosphere the atmosphere consisting of protective gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/02—Supplying steam, vapour, gases, or liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/007—Partitions

Definitions

  • the invention relates to a method for heating a galvanized workpiece, in which the workpiece is guided by a conveyor through a continuous furnace and is heated in this by a heating medium.
  • the invention further relates to a continuous furnace for carrying out the method.
  • the goal is to develop vehicles with the lowest possible fuel consumption.
  • a common means of reducing fuel consumption is, for example, in the reduction of vehicle weight.
  • the body steels used have a higher strength at a lower weight. This is usually achieved by the process of so-called press-hardening. In this case, a sheet metal part is heated to about 800-1000 ° C and then deformed in a cooled tool and quenched. The strength of the component increases by up to about three times.
  • galvanized steel sheets are also preferably used, since these have good corrosion properties.
  • the press hardening of galvanized steel sheets with the known methods and associated furnaces so far not satisfactory possible.
  • a metal oxide forms in the presence of oxygen in free or chemically bound form, as the reactivity by the oxygen increases.
  • the workpiece scales and since the metal oxide has a significantly lower density than the metal, it dissolves from the base material.
  • the electrolytic protective property of zinc on the base material is nullified.
  • Continuous furnaces with a protective gas atmosphere usually have the disadvantage that the atmosphere is continuously contaminated by entrained during production convection inside the oven by entrained with the good oxygen and moisture of the material surface.
  • the convection is effected by the still cold workpieces at the beginning of the furnace, as these cool the atmosphere and resulting thermals creates a large shielding gas through the entire furnace system, which causes an undesirable mixing of the inlet side introduced oxidizing gases in the critical end of the furnace.
  • German Patent DE 197 19 203 C2 discloses a sintering process for iron powder-pressed molded parts in which a protective gas guide is provided in the furnace.
  • a protective gas guide is provided in the furnace.
  • the operation of this known sintering furnace can not be transferred to the heating and press hardening of galvanized steel sheets.
  • the object of the invention is therefore to provide a method by means of which galvanized workpieces can be heated, in particular hardenable steel sheet to press-harden them, without the good cold workability and high corrosion resistance must be lost.
  • the process should both reduce the already existing on the metal oxides, as well as avoid new oxide formation and further reduce the consumption of inert gas.
  • the object of the invention is also to provide a furnace for carrying out the method.
  • this object is achieved by a method having the features of independent claim 1.
  • Advantageous developments of the method will become apparent from the dependent claims 2-6 and the subject matter of claim 7, the invention is supplemented by a method for press hardening of workpieces, which were previously heated by the method according to the invention.
  • the object is further achieved by a continuous furnace according to claim 8.
  • Advantageous embodiments of this furnace emerge from the dependent claims 9-13.
  • the invention includes a method for heating a galvanized Workpiece in which the workpiece is passed through a continuous furnace and heated in this by a heating medium.
  • the workpiece is guided by means of a conveyor through a plurality of successive chamber areas of the continuous furnace and in these chamber areas, a protective gas mixture is fed via respective feed points.
  • the total flow of the protective gas mixture flows counter to the direction of passage of the workpiece through the continuous furnace, wherein the compositions of the introduced via the respective feed points inert gas mixtures in the chamber regions preferably differ.
  • the protective gas mixture fed in the last chamber area has the lowest oxygen content since the workpieces assume the highest temperature in this area.
  • a convection roll of protective gas is prevented by guide systems between the chamber regions through the entire continuous furnace.
  • a protective gas mixture is produced by partial combustion of a hydrocarbon-air mixture in a noble metal catalyst.
  • the heat required for the partial combustion is generated by the cleavage process in the catalyst.
  • the partial combustion in the noble metal catalyst takes place, for example, from about 700 ° C.
  • composition of a protective gas mixture fed into a chamber region of the continuous furnace is preferably chosen as a function of the temperature of the workpiece in the respective chamber region such that galvanization of the workpiece does not oxidize.
  • the flow rate of the protective gas mixture through the furnace is preferably higher than the rate of return diffusion.
  • the invention also includes a method for press-hardening a workpiece in a press, in which the workpiece has been heated prior to introduction into the press by the method according to the invention.
  • the invention comprises a continuous furnace for heating a galvanized workpiece with a conveying means for guiding the workpiece through the continuous furnace and a heating means for heating the workpiece as it passes through the furnace.
  • the continuous furnace comprises a plurality of chamber areas, through which the workpiece can be guided by means of the conveying means, wherein in each of the chamber areas at least one feeding point is provided for feeding a protective gas mixture.
  • the compositions of the protective gas mixtures introduced via the respective feed points differ in the chamber regions, the inert gas mixture fed in the last chamber region having the lowest oxygen content.
  • protective gas guidance systems are arranged between the chamber regions, which prevent the formation of a large convection roll of inert gas mixture through the entire furnace system.
  • the guide systems are partitions each having an opening through which the conveying means of the furnace extends.
  • a protective gas flow is also generated counter to the passage direction of the workpiece.
  • the velocity of the protective gas flow through the continuous furnace is preferably set to be higher is considered the back diffusion speed.
  • the oven is suitably thermostated at a temperature which is above the predetermined heating temperature of the workpiece.
  • the method according to the invention and the associated continuous furnace have the advantage that a protective gas is passed through the furnace in such a way that in each section of the furnace the correct protective gas mixture is offered which matches the actual temperature.
  • a protective gas is passed through the furnace in such a way that in each section of the furnace the correct protective gas mixture is offered which matches the actual temperature.
  • the endogas generated in the catalyst bed in the furnace wall at a low temperature in the interior of the continuous furnace is selectively guided by internals, which prevent a large convection through the entire furnace system.
  • the protective gas is conducted so that the ratio of the reacting constituents is always kept temperature-related in the reducing range.
  • the use of a noble metal catalyst allows the generation of endogas even from temperatures of 700 ° C, with a noble metal catalyst compared to, for example, a nickel catalyst is safe for health.
  • the invention thus turns away from continuous furnaces, in which the protective gas is generated outside the furnace and fed into the furnace chamber. It also turns away from heated nickel retorts in the furnace itself and from the various methods of coating galvanized metal components to eliminate the need for a shielding gas.
  • An advantage of the invention over conventional methods for preventing scaling of galvanized steel components lies in the protective gas atmosphere, which is always matched to the temperature of the workpiece.
  • the sole feeding of inert gas at several points in the furnace chamber would indeed at exactly this feed point also create the desired atmosphere, but due to a produced during production convection inside the furnace, the atmosphere would constantly contaminated by entrained with the good oxygen and entrained moisture of the material surface.
  • the reason for this is the still cold workpiece in the oven inlet area.
  • the workpiece also cools the protective gas atmosphere in this area, which makes it specifically heavier than the atmosphere in the further course of the furnace.
  • the gas with its greater specific gravity falls down and displaces the warmer and better qualified atmosphere in the further course of the furnace.
  • the invention advantageously solves this problem by guiding systems within the furnace, which prevent a shielding gas roller through the entire furnace.
  • the partitions used as guide systems between the individual chamber areas of the furnace the formation of a large inert gas is prevented by the entire furnace. It may occur only smaller gas rollers within the chamber areas.
  • the remaining protective gas flow through the openings in the partitions can not produce a gas cylinder, with the low-quality inert gas in the rear region of the Furnace can get.
  • the use of a noble metal catalyst which can produce from a combustion temperature of about 700 ° C shielding gas, also has the advantage that it is less expensive compared to conventional catalyst beds and more economical due to the lower energy consumption.
  • the temperature required for the combustion of gases in the noble metal catalyst can be achieved by the cleavage process in the catalyst, while conventional nickel catalysts, for example, require a temperature of at least 1000 ° C, which can only be achieved by an additional energy input.
  • the continuous furnace 10 typically comprises an elongate housing having an inlet and an outlet opening through which workpieces to be heated pass through the furnace.
  • the furnace also comprises at least two separate areas, in each of which protective gas is fed. These areas are in the form of chambers.
  • the furnace comprises four chamber regions 11, 12, 13 and 14.
  • the chambers are separated by guide systems 71, 72 and 73, the guide systems serving to selectively guide the protective gas through the furnace.
  • the guide systems are preferably partitions with an opening through which a workpiece can be guided. To prevent a shielding gas cylinder through the entire furnace interior, the opening in the partition wall is as small as possible, but it must be sufficiently large to be able to transport in the oven to be heated workpieces with possibly different sizes and shapes on the conveyor through the oven can.
  • the continuous furnace further comprises a conveyor 50, with which a workpiece 20 is transported through the oven.
  • a conveyor 50 at which a workpiece 20 is transported through the oven.
  • This means of transport is, for example, a roller hearth.
  • a workpiece 20 is exemplified in Fig. 1 as a curved member which is placed on the roller hearth 50 to be heated in the oven to a predetermined temperature.
  • the conveyor 50 passes through the oven with the workpiece, passing through the entrance opening, the openings in the partitions, and the exit opening.
  • the workpiece can be transported directly on the conveyor or indirectly by means of workpiece carriers.
  • the direction of movement of the means of transport with the workpiece is indicated in FIG. 1 by a large arrow.
  • the protective gas flow is marked in Fig. 1 with small arrows and extends according to the invention against the movement of the workpieces.
  • This protective gas flow is effected by the guide systems inside the furnace.
  • the desired gas flow may also be assisted by a slight tilt of the entire furnace, where the front end of the furnace is higher than the rear end.
  • the warmer shielding gas mixture flows from the end of the furnace upwards and thus to the front end of the furnace.
  • the protective gas flow against the workpiece movement can also be supported by an alignment of the feed points for the protective gas.
  • the respective gas outlets are adjusted so that there is a directed flow of the exiting protective gas.
  • the velocity of the inert gas flow is preferably higher than the rate at which back diffusion occurs. So the quality of the protective gas is at the beginning Although the furnace is the least, this is harmless because it hits there on low temperature workpieces that have just been introduced into the oven. These workpieces make a lower demand on the protective gas quality, whereas the fully heated workpieces at the end of the continuous furnace require a higher protective gas quality and this can be ensured in particular by the guidance systems within the furnace.
  • a workpiece 20 to be heated is often a sheet metal part made of galvanized sheet steel.
  • other shaped workpieces of other metals can be heated.
  • the inventive method is particularly suitable for heating workpieces made of sheet steel for press-hardened body parts in the automotive industry.
  • the furnace 10 For heating the workpiece, the furnace 10 comprises a heating device 60.
  • the heating elements used for this purpose are in the embodiment shown in FIG. 1 in the upper region of the furnace chambers, so that the workpiece is heated from above. However, the heating elements can also be arranged below or on both sides of the workpieces.
  • the heating can, for example, be carried out electrically via resistors or by fuel-operated burners. After a predetermined residence time in the heating area of the furnace, each workpiece introduced there is brought to the predetermined temperature, which, for example, amounts to 930-980 ° C. for some steels.
  • each workpiece is removed from the heating area and can then both be transformed in a press and cured.
  • the pressing process can be carried out by methods generally known to the person skilled in the art and pressing are performed. It is advantageous that the transfer from the oven to the press takes place quickly, so that an impermissible oxidation of the zinc in the ambient air is omitted.
  • the furnace preferably comprises in each chamber region 11, 12, 13 and 14 in each case a feed point 31, 32, 33 and 34 in order to feed in a protective gas mixture.
  • a feed point comprises a metal catalyst, which is preferably incorporated at the lowest point of the furnace.
  • FIG. 2 is a schematic view of a cross section through the continuous furnace according to FIG. 1.
  • a workpiece 20 is transported on a conveyor 50 through the oven 10 and is heated by above the transport means arranged heating means 60.
  • the catalyst 40 of a feed point is installed in the furnace wall 15.
  • FIG. 1 An exemplary embodiment for the installation of a catalyst in the furnace wall for producing a protective gas mixture is shown in FIG. It is preferably a noble metal catalyst, which is installed in the furnace wall so that it can be fed from the outside with gas.
  • a pipe system is connected, for example, for natural gas and air, with which a certain mixing ratio can be adjusted.
  • the protective gas is generated for example by partial combustion of hydrocarbon-rich fuel gases such as natural gas or propane.
  • the heat for this combustion generates the cleavage process of the catalyst, the process being stable at the comparatively low temperature level of about 800 ° C.
  • the noble metal catalyst may preferably already at temperatures above 700 ° C hydrocarbon-air mixtures convert into strongly reducing endogas and is harmless to health compared to a conventional nickel catalyst. Furthermore, the life expectancy of a noble metal catalyst is higher than, for example, that of a nickel catalyst.
  • the resulting shielding gas consists essentially of nitrogen, hydrogen, carbon monoxide and other gases.
  • the ratio of the individual gases must be below the Zn / ZnO reduction curve, which is indicated in FIG. 4 in a diagram.
  • the reduction curves for different metals depending on the ratios of the partial pressures of the individual gases in the atmosphere over the temperature are plotted.
  • the position of the reduction curve for zinc is thus dependent on the temperature of the workpiece within the continuous furnace. Since the temperature of the product rises steadily as it passes through the furnace, the optimum protective gas mixture through the furnace is also variable.
  • a different inert gas mixture is fed into each chamber area via an entry point.
  • a workpiece is transported through a continuous furnace 10, it takes in the course of heating in the individual chamber areas 11, 12, 13 and 14, for example, the marked in Fig. 1 temperatures of 500, 700, 800 and 980 ° C. In the last chamber area, the workpiece is therefore the warmest and has a temperature of about 980 ° C. At this annealing temperature, it can be seen from the diagram in FIG. 4 that a ratio of the partial pressures H 2 / H 2 O of more than 80 and CO / CO 2 of more than 90 is required for oxide-free annealing of zinc.
  • a partial pressure ratio H 2 / H 2 O of about 80 and a CO / CO 2 partial pressure ratio of about 90 in the generated gas mixture for example, at a ratio of air to methane in the fuel mixture of about 2, 4 reached.
  • the curves for moist gases (f) and vaporous H 2 O (D) are used.
  • about 39% by volume of H 2 and 0.45% by volume of H 2 O are present in the protective gas atmosphere, while about 21% by volume of CO and 25% by volume of Co 2 are present.
  • the inert gas is generated and fed as needed in the separated sections 11, 12, 13 and 14 of the continuous furnace.
  • the different requirements of the metal and its temperature are taken into account.
  • the internals inside the furnace prevent the formation of a protective gas cylinder, which could lead to protective gas with an excessively high proportion of oxygen in the critical rear furnace area.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Coating With Molten Metal (AREA)
  • Furnace Details (AREA)
EP06004360A 2006-03-03 2006-03-03 Four continu à chambres multiples avec atmosphère protectrice et procédé pour le chauffage de pièces galvanisées sans couche oxydée Not-in-force EP1830147B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES06004360T ES2383964T3 (es) 2006-03-03 2006-03-03 Horno de paso continuo de varias cámaras con funcionamiento de gas protector y procedimiento para el calentamiento libre de óxido de piezas de trabajo galvanizadas
EP06004360A EP1830147B1 (fr) 2006-03-03 2006-03-03 Four continu à chambres multiples avec atmosphère protectrice et procédé pour le chauffage de pièces galvanisées sans couche oxydée
AT06004360T ATE553344T1 (de) 2006-03-03 2006-03-03 Mehrkammer-durchlaufofen mit schutzgasbetrieb und verfahren zum oxidfreien erwärmen von verzinkten werkstücken

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06004360A EP1830147B1 (fr) 2006-03-03 2006-03-03 Four continu à chambres multiples avec atmosphère protectrice et procédé pour le chauffage de pièces galvanisées sans couche oxydée

Publications (2)

Publication Number Publication Date
EP1830147A1 true EP1830147A1 (fr) 2007-09-05
EP1830147B1 EP1830147B1 (fr) 2012-04-11

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EP06004360A Not-in-force EP1830147B1 (fr) 2006-03-03 2006-03-03 Four continu à chambres multiples avec atmosphère protectrice et procédé pour le chauffage de pièces galvanisées sans couche oxydée

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EP (1) EP1830147B1 (fr)
AT (1) ATE553344T1 (fr)
ES (1) ES2383964T3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009017610A1 (de) 2009-04-15 2010-10-21 Gemkow, Stefan, Dipl.-Ing. Behandlungstunnel, insbesondere zum Betrieb bei hohen oder niedrigen Temperaturen und/oder in Schutzgasatmosphäre und zugehöriges Behandlungsverfahren
EP2487268A1 (fr) * 2011-02-10 2012-08-15 Schwartz, Eva Four
WO2014076266A1 (fr) * 2012-11-19 2014-05-22 Schwartz Gmbh Four à rouleaux et procédé de traitement thermique de tôles métalliques
WO2018206269A1 (fr) * 2017-05-11 2018-11-15 Gottfried Wilhelm Leibniz Universität Hannover Procédé pour le traitement thermique d'une pièce et installation correspondante
US10612108B2 (en) 2014-07-23 2020-04-07 Voestalpine Stahl Gmbh Method for heating steel sheets and device for carrying out the method
EP3839079A1 (fr) * 2019-12-20 2021-06-23 Hyundai Steel Company Pièce estampée à chaud et son procédé de fabrication
CN113905832A (zh) * 2019-12-20 2022-01-07 现代制铁株式会社 热冲压用坯料及其制造方法，热冲压部件及其制造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013107777A1 (de) 2013-07-22 2015-01-22 Thyssenkrupp Steel Europe Ag Vorrichtung zur Wärmebehandlung beschichteter Stahlhalbzeuge
CN105937853B (zh) * 2016-05-26 2018-03-06 孙颖 钢带式还原炉保护气氛气体系统

Citations (7)

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DE102009017610A1 (de) 2009-04-15 2010-10-21 Gemkow, Stefan, Dipl.-Ing. Behandlungstunnel, insbesondere zum Betrieb bei hohen oder niedrigen Temperaturen und/oder in Schutzgasatmosphäre und zugehöriges Behandlungsverfahren
EP2487268A1 (fr) * 2011-02-10 2012-08-15 Schwartz, Eva Four
WO2012107110A1 (fr) * 2011-02-10 2012-08-16 Schwartz, Eva Four
WO2014076266A1 (fr) * 2012-11-19 2014-05-22 Schwartz Gmbh Four à rouleaux et procédé de traitement thermique de tôles métalliques
CN105283728A (zh) * 2012-11-19 2016-01-27 施瓦兹有限公司 用于金属板热处理的辊底式炉和方法
CN105283728B (zh) * 2012-11-19 2017-04-26 施瓦兹有限公司 用于金属板热处理的辊底式炉和方法
US10612108B2 (en) 2014-07-23 2020-04-07 Voestalpine Stahl Gmbh Method for heating steel sheets and device for carrying out the method
WO2018206269A1 (fr) * 2017-05-11 2018-11-15 Gottfried Wilhelm Leibniz Universität Hannover Procédé pour le traitement thermique d'une pièce et installation correspondante
EP3839079A1 (fr) * 2019-12-20 2021-06-23 Hyundai Steel Company Pièce estampée à chaud et son procédé de fabrication
CN113905832A (zh) * 2019-12-20 2022-01-07 现代制铁株式会社 热冲压用坯料及其制造方法，热冲压部件及其制造方法
CN113924373A (zh) * 2019-12-20 2022-01-11 现代制铁株式会社 热冲压部件及其制造方法
US11583909B2 (en) * 2019-12-20 2023-02-21 Hyundai Steel Company Hot-stamped part and method of manufacturing the same
CN113924373B (zh) * 2019-12-20 2023-09-01 现代制铁株式会社 热冲压部件及其制造方法
US11931785B2 (en) 2019-12-20 2024-03-19 Hyundai Steel Company Method of manufacturing a hot-stamped part
US11931786B2 (en) 2019-12-20 2024-03-19 Hyundai Steel Company Method of manufacturing a hot-stamped part
US11938530B2 (en) 2019-12-20 2024-03-26 Hyundai Steel Company Method of manufacturing a hot-stamped part

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