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EP1673483B1 - Procede de traitement thermique de matieres ferreuses - Google Patents

Procede de traitement thermique de matieres ferreuses Download PDF

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Publication number
EP1673483B1
EP1673483B1 EP04765727A EP04765727A EP1673483B1 EP 1673483 B1 EP1673483 B1 EP 1673483B1 EP 04765727 A EP04765727 A EP 04765727A EP 04765727 A EP04765727 A EP 04765727A EP 1673483 B1 EP1673483 B1 EP 1673483B1
Authority
EP
European Patent Office
Prior art keywords
endogas
nitrogen
hearth furnace
roller hearth
continuous roller
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.)
Expired - Lifetime
Application number
EP04765727A
Other languages
German (de)
English (en)
Other versions
EP1673483B8 (fr
EP1673483A1 (fr
Inventor
Philippe Grognet
Hans-Peter Schmidt
Günter WAGENDORFER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Messer Austria GmbH
Air Liquide Deutschland GmbH
Messer Group GmbH
Messer France SAS
Original Assignee
Messer Austria GmbH
Air Liquide Deutschland GmbH
Messer Group GmbH
Messer France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Messer Austria GmbH, Air Liquide Deutschland GmbH, Messer Group GmbH, Messer France SAS filed Critical Messer Austria GmbH
Priority to PL04765727T priority Critical patent/PL1673483T3/pl
Publication of EP1673483A1 publication Critical patent/EP1673483A1/fr
Publication of EP1673483B1 publication Critical patent/EP1673483B1/fr
Application granted granted Critical
Publication of EP1673483B8 publication Critical patent/EP1673483B8/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • 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
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material

Definitions

  • the invention relates to a method for the heat treatment of iron materials, in particular for the annealing of pipes, profiles, wires, rods and sheets of metal or steel, in a heat treatment plant with a cooling tunnel and a boiler room under a protective gas atmosphere of endogas mixtures.
  • exogas When annealing pipes, profiles, wires, rods and sheets, exogas is often used as protective gas.
  • This protective gas is produced in exogas generators.
  • the premixed natural gas / air gas stream is fed to a combustion chamber and reacted there. Since the CH4 / air ratio is greater than 2.41 (eg 6.5), there is no need for external heating of the gas mixture to the reaction temperature.
  • the very moist exogas produced in this way is cooled to room temperature and fed to a dryer.
  • the dew point of the dried gas is then about -30 ° C (0.10 vol .-% H2O).
  • a typical exogas has a composition of 7% H2, 7% CO, 7% CO2, 0.10% H2O, balance N2.
  • the gas mixture is then fed to a heat treatment plant and it turns in the boiler room - at a temperature of greater than 400 ° C - abruptly a moist furnace gas.
  • Boiler room reaction CO2 + H2 ⁇ CO + H2O (homogeneous water gas reaction)
  • the carbon activity decreases to less than 1, thereby decarburizing the iron-carbon alloys during the heat treatment.
  • Exogas as a protective gas in heat treatment furnaces, which is why endogas is also used as a protective gas in the heat treatment of iron materials.
  • endogas generators The production of endogas takes place in endogas generators.
  • the premixed natural gas / air mixture is fed to a heated retort with catalyst filling and reacted there.
  • the endogas is produced from a hydrocarbon and air, eg according to the following reaction equation: CH4 + 2.41 (0.79 N2 + 0.21 O2) ⁇ CO + 2 H2 + 0.79 N2 + traces H2O and CO2
  • the generated endogas is cooled to room temperature and is then ready for use.
  • the dew point of the endogas used in the heat treatment of iron materials as a protective gas is in the range of - 10 ° C and + 5 ° C with 0.30 to 0.86 Vol .-% H2O.
  • Endogenous gas commonly used in the conventional heat treatment of metals as inert gas has a composition of: 40% H2, 20% CO, 0.30% CO2, 0.86% H2O, balance N2.
  • This "pure” endogas is diluted with nitrogen and then added to the heat treatment equipment, e.g. a roller hearth furnace, fed.
  • the heat treatment equipment e.g. a roller hearth furnace
  • EP 0261461 A discloses a method for heat treating metallic materials in a continuous hearth furnace in a protective gas atmosphere, wherein endogas is generated by an internal gas generator, and in addition nitrogen is supplied on both sides of the treatment gas supply point.
  • the invention is therefore based on the object to provide a method for heat treatment of iron materials available, with which can be improved and made safer by a targeted inert gas metering of the heat treatment process.
  • the object is achieved by a method for heat treatment of iron materials with the features of claim 1.
  • pure gas or partially nitrogen-diluted endogas and additionally pure nitrogen are fed separately as protective gas into different regions of the heat treatment plant.
  • the endogas will enter the boiler room end, i. in the opposite end of the Schuraumeinlauf end of the boiler room, fed transversely to the transport direction of the heat treatment and additional nitrogen in different areas of the cooling tunnel of the heat treatment plant by means of conventional nozzle devices.
  • the inert gas entry into the heat treatment plant according to the invention causes the formation of a flow profile oriented to the heating chamber inlet, whereby a high protective gas concentration in the heating chamber and a much lower inert gas concentration in the cooling tunnel of the heat treatment plant is present.
  • the endogas produced in an external endogas generator and fed into the heat treatment plant has a slightly higher dew point (+5 to +10 ° C) than the endogas used in the conventional procedure (maximum dew point + 5 ° C).
  • the higher dew point temperature causes an increase in the service life of the catalyst and the retort of the heat treatment plant, since the risk of soot deposition in the catalyst bed is lower, thus preventing overheating of the catalyst during the necessary Rußabbrete to regenerate the catalyst.
  • the dosing quantity of endogas required for the respective heat treatment process is set automatically by means of a metering valve as a function of the respective process conditions, whereby the excess amount of endogas can be minimized and, in addition, as little endogas as possible has to be flared.
  • the dosing time of the endogas and nitrogen is detected in the usual way and is used to calculate the actual oxygen and carbon activities during the heat treatment process.
  • the endogas is mixed with a partial amount of nitrogen in an endomat arranged outside the heat treatment plant.
  • the endogas is introduced at an overpressure of 40 to 60 mbar through a, arranged in the nitrogen pipe, advantageously L-shaped tube formed in the means of a Feinbuchreglers to an excess pressure of 20 to 30 mbar regulated nitrogen.
  • the metered amount of natural gas and air is changed so that the required dosage of endogas reduced and / or the natural gas / air ratio is changed, whereby the composition of the endogases is adversely affected.
  • soot By changing the mixing ratio, soot can deposit in the catalyst, whereby the effectiveness of the catalyst is reduced. If the air supply is too high, the dew point rises unintentionally, so that overheating can occur at the beginning of the catalytic converter.
  • the nitrogen is introduced into different regions of the cooling tunnel of the heat treatment plant, but particularly advantageously injected into the cooling tunnel region arranged in front of the heating chamber inlet and into the cooling tunnel region arranged upstream of the cooling tunnel outlet.
  • the protective gas entry according to the invention an optimal concentration profile of the protective gas in the heating and cooling chamber of the heat treatment plant is adjusted and at the same time prevents the unwanted influx of atmospheric oxygen into the cooling tunnel of the heat treatment plant.
  • the heat treatment plant is equipped with a lambda probe arranged at the cooling tunnel outlet, by means of which the inflow of environmental pleasure, as well as the nitrogen feed, can be detected.
  • the cooling capacity of the cooling tunnel can be further increased.
  • the liquid nitrogen having a temperature of -196 ° C is advantageously introduced into the last third of the cooling tunnel, i. in the cooling tunnel area closest to the cooling tunnel outlet for lowering the outlet temperature of the heat treatment material transported out of the heating room or into the first third of the cooling tunnel, i. entered into the cooling tunnel entrance nearest cooling tunnel area to increase the cooling rate of the heat treatment material for hardening purposes.
  • the convection of the protective gas is significantly improved and also allows the heating enthalpy of the nitrogen, a faster cooling of the heat-treated workpieces.
  • thermocouple located at the heat treatment plant - process gas is taken to determine the optimum concentration profile of shielding gas over the entire plant length.
  • the gas sampling device can also be equipped with a gas analyzer, a lambda probe or other measuring systems, whereby no additional gas sampling points are required at the heat treatment plant.
  • the electronically determined measured values are used for the automatic protective gas control at a gas composition deviating from a predetermined nominal value.
  • the protective gas concentration in the heating chamber of the heat treatment plant is increased by about 50 to 60 percent, so that the entry amount of endogas can be reduced by about 30 to 40 percent.
  • the protective gas entry according to the invention forms a reaction front, which flows counter to the heat treatment material, ie, the partially reacted end gas escapes via the heating chamber inlet and thus only nitrogen-added endogas flows into the cooling tunnel, whereby the undesired oxidation of iron in the cooling tunnel of the heat treatment plant is substantially reduced because the H2O / H2 ratio in the cooling tunnel is much lower than in the boiler room of the heat treatment plant.
  • the protective gas in the cooling tunnel has a significantly lower dew point (for example -7 degrees Celsius) than in the heating chamber (for example +10 degrees Celsius) prevents water condensation in the cooling tunnel of the heat treatment plant.
  • the kinetics of carburizing or recarbonization during the heat treatment are greater, so that the residence time of the heat treatment material in the heating chamber is substantially reduced.
  • the kinetics of the reduction of iron oxide to hot-deformed iron alloys such as e.g. Wires, pipes, profiles, especially large, so that their oxide layers are completely reduced.
  • the oxide-free workpieces can then be machined with reduced effort, e.g. pickled, are and have a surface quality that meets the increasing demands.
  • the endogas used according to the invention for heat treatment also has a much higher "reduction power" than conventionally used exogas, ie it can form and absorb more water and carbon dioxide without the reduction being stopped becomes.
  • the higher concentration of hydrogen (H2) and carbon monoxide (CO) in the boiler room of the heat treatment plant results in a higher heat-up rate of the heat treatment than when using a conventional protective gas of exogas or monogas (N2 less than 5% H2).
  • the endogas and nitrogen feed according to the invention has the significant advantage that a concentration profile of the reactive components is advantageously established, whereby the risk of explosion is reduced and the reaction kinetics and Auffilge-speed are optimized.
  • Fig. 1 the controllability of the carbon activity of exogas and endogas (endolin) is shown in the heat treatment of typical iron-carbon alloys with a carbon content of 0.15 to 0.70%.
  • the carbon activities a c of a conventional shielding gas (exogas) and of several shielding gases (endogas in the form of endoline) with 1 to 5% CO are compared.
  • the nitrogen gas added endogenous gas must be added to the carbon activity a c to the value of 1 gas, preferably propane, because of its significantly better reactivity with water and carbon dioxide.
  • the carbon activity in the heating chamber gas can be increased by lowering the dew point in the generated endogenous gas at the endogenerator, since the carbon activity in the mixed gas increases with decreasing water concentration in the endogas.
  • Fig. 2 shows a furnace (boiler room) with cooling tunnel, which once endogas with a quantity of nitrogen premixed in the last third of the boiler room and the main amount of pure nitrogen in the middle / last third of the cooling tunnel are fed (variant 2).
  • variants 1 and 3 different amounts of endogas (10 and 30 m3 / h) are mixed with nitrogen externally of the furnace and fed completely into the feed point in the boiler room, ie the same concentrations of hydrogen and carbon monoxide prevail at each point in the boiler room and cooling tunnel have to. In all 3 variants is the Total amount of gas always kept constant at 140 m3 / h. With variant 2 results in external complete mixture of endogas and nitrogen, a hydrogen concentration of 5.8 vol .-% H2, ie, the explosion limit of 5 vol .-% H2, CO is significantly exceeded.
  • Variant 3 illustrates that it is only possible with a small amount of endogas (10m3 / h) to realize the safety condition of less than 5% by volume H2, CO. According to variant 2, the aspects of safety and the highest possible H2, CO concentration in the boiler room are thus realized.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Furnace Details (AREA)
  • Tunnel Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Claims (19)

  1. Procédé de recuit de tubes, de profilés, de fils, de barres ou de tôles en matériaux ferreux dans un four à rouleaux d'avancement qui présente un tunnel de refroidissement et un espace de chauffage, sous une atmosphère de gaz de protection constitué de mélanges d'endogaz,
    caractérisé en ce que
    de l'endogaz dilué à l'azote et de plus de l'azote pur sont injectés séparément l'un de l'autre et dans différentes parties de l'installation,
    en ce que l'endogaz dilué à l'azote à l'extérieur du four à rouleaux d'avancement dans un rapport de mélange compris dans la plage de 1:19 à 1:3 est introduit directement dans l'espace de chauffage et
    en ce que de l'azote supplémentaire utilisé pour diluer l'endogaz est injecté dans différentes parties du tunnel de refroidissement.
  2. Procédé selon la revendication 1, caractérisé en ce que l'endogaz constitué de monoxyde de carbone (CO), d'hydrogène (H2) et d'azote (N2) est injecté à l'extrémité de l'espace de chauffage et transversalement par rapport à la direction du transport du produit à traiter thermiquement.
  3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce qu'avant la dilution à l'azote, le point de rosée de l'endogaz est compris dans la plage de +5 à +15°C.
  4. Procédé selon la revendication 3, caractérisé en ce que l'endogaz est injecté dans l'espace de chauffage du four à rouleaux d'avancement au moyen d'au moins une soupape de dosage automatique.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les quantités d'endogaz et d'azote injectées dans le four à rouleaux d'avancement sont détectées et sont utilisées pour déterminer les activités effectives de l'oxygène et du carbone pendant le traitement thermique.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour améliorer la convection de l'endogaz dans l'espace de chauffage, de l'azote est ajouté dans l'endogaz à l'extérieur du four à rouleaux d'avancement.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'activité imposée du carbone dans la phase gazeuse présente dans l'espace de chauffage du four à rouleaux d'avancement est établie par l'intermédiaire du point de rosée de l'endogaz pur formé dans un générateur d'endogaz.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que lorsque l'activité carbone est trop élevée, de l'air est injecté dans le mélange d'endogaz apporté dans l'espace de chauffage du four à rouleaux d'avancement et en ce qu'une phase gazeuse homogène se forme à l'extérieur de l'emplacement d'injection de gaz.
  9. Procédé selon la revendication 6, caractérisé en ce que l'endogaz est introduit à une surpression de 40 à 60 mbars dans l'azote qui présente une surpression de 20 à 30 mbars.
  10. Procédé selon la revendication 9, caractérisé en ce que l'endogaz est introduit par un tube de mélange cintré disposé dans le conduit tubulaire d'azote.
  11. Procédé selon la revendication 9, caractérisé en ce que l'endogaz est introduit à une surpression de 60 mbars par un injecteur qui aspire et mélange l'endogaz à l'aide de l'écoulement d'azote pour ainsi former un endogaz dilué homogène.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que les quantités dosées de gaz naturel et d'air ainsi que les quantités dosées d'endogaz sont régulées en fonction de la pression d'accumulation qui règne dans le conduit d'azote et d'endogaz disposé dans le four à rouleaux d'avancement.
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'azote est injecté dans le tunnel de refroidissement par un premier écoulement partiel orienté en direction de l'entrée de l'espace de chauffage et par un deuxième écoulement partiel orienté en direction de la sortie du tunnel de refroidissement du four à rouleaux d'avancement.
  14. Procédé selon la revendication 8, caractérisé en ce que la quantité dosée d'azote est régulée au moyen d'une sonde lambda disposée dans la zone de sortie du four à rouleaux d'avancement.
  15. Procédé selon l'une des revendications précédentes, caractérisé en ce que les composants volatils du produit à traiter thermiquement, qui se vaporisent hors de l'espace de chauffage du four à rouleaux d'avancement, sont transportés vers l'entrée du four à rouleaux d'avancement pour y être brûlés en torchère et évacués.
  16. Procédé selon l'une des revendications précédentes, caractérisé en ce que de l'azote liquide est injecté dans le premier tiers de la partie du tunnel de refroidissement adjacente à la sortie du tunnel de refroidissement ou dans le dernier tiers de la partie du tunnel de refroidissement du four à rouleaux d'avancement adjacente à la sortie de l'espace de refroidissement.
  17. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour déterminer le profil de concentration du gaz de protection, ce dernier est prélevé dans le four à rouleaux d'avancement pendant l'opération de traitement thermique sur toute la longueur du four à rouleaux d'avancement et au moyen d'au moins un dispositif de prélèvement de gaz disposé sur le four à rouleaux d'avancement, et est utilisé après traitement électronique pour réguler automatiquement l'apport d'endogaz et d'azote dans le four à rouleaux d'avancement.
  18. Procédé selon l'une des revendications précédentes, caractérisé en ce que la somme des concentrations en monoxyde de carbone (CO) et en hydrogène (H2) à la fin du tunnel de refroidissement du four à rouleaux d'avancement est inférieure à 5 % en volume.
  19. Procédé selon l'une des revendications précédentes, caractérisé en ce que le point de rosée du gaz de protection dilué à l'azote est plus bas dans le tunnel de refroidissement que dans la chambre de chauffage du four à rouleaux d'avancement.
EP04765727A 2003-10-08 2004-10-01 Procede de traitement thermique de matieres ferreuses Expired - Lifetime EP1673483B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04765727T PL1673483T3 (pl) 2003-10-08 2004-10-01 Sposób obróbki cieplnej stopów żelaza

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10347312A DE10347312B3 (de) 2003-10-08 2003-10-08 Verfahren zur Wärmebehandlung von Eisenwerkstoffen
PCT/EP2004/010951 WO2005035799A1 (fr) 2003-10-08 2004-10-01 Procede de traitement thermique de matieres ferreuses

Publications (3)

Publication Number Publication Date
EP1673483A1 EP1673483A1 (fr) 2006-06-28
EP1673483B1 true EP1673483B1 (fr) 2010-02-24
EP1673483B8 EP1673483B8 (fr) 2010-08-11

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Family Applications (1)

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EP04765727A Expired - Lifetime EP1673483B8 (fr) 2003-10-08 2004-10-01 Procede de traitement thermique de matieres ferreuses

Country Status (6)

Country Link
EP (1) EP1673483B8 (fr)
AT (1) ATE458837T1 (fr)
DE (2) DE10347312B3 (fr)
ES (1) ES2341861T3 (fr)
PL (1) PL1673483T3 (fr)
WO (1) WO2005035799A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT502238B1 (de) * 2005-05-12 2007-12-15 Ebner Ind Ofenbau Verfahren zur chargenweisen wärmebehandlung von glühgut
EP2487268B1 (fr) 2011-02-10 2014-10-22 Schwartz, Eva Four
CN103805840B (zh) * 2012-11-15 2016-12-21 宝山钢铁股份有限公司 一种高成形性热镀锌超高强度钢板及其制造方法
DE102013014815A1 (de) * 2013-09-10 2015-03-12 Ipsen International Gmbh Steuerungssystem für einen Endogasgenerator, sowie Verfahren zur Regelung mindestens eines Endogasgenerators

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950192A (en) * 1974-10-30 1976-04-13 Monsanto Company Continuous carburizing method
US4288062A (en) * 1979-08-09 1981-09-08 Holcroft Apparatus for control and monitoring of the carbon potential of an atmosphere in a heat-processing furnace
DE3277843D1 (en) * 1981-09-19 1988-01-28 British Oxygen Co Ltd Heat treatment of metals
FR2527641A1 (fr) * 1982-05-28 1983-12-02 Air Liquide Procede de traitement thermique de pieces metalliques par carburation
DE3630833A1 (de) * 1986-09-10 1988-03-17 Linde Ag Verfahren und vorrichtung zur waermebehandlung metallischer werkstuecke
FR2623209B1 (fr) * 1987-11-17 1993-09-03 Air Liquide Procede de traitement thermique sous atmosphere gazeuse a base d'azote et d'hydrocarbure
DE3828134A1 (de) * 1988-08-18 1990-02-22 Linde Ag Verfahren zur waermebehandlung von werkstuecken
FR2649123B1 (fr) * 1989-06-30 1991-09-13 Air Liquide Procede de traitement thermique de metaux
DE19545764C2 (de) * 1995-12-07 2000-02-17 Linde Ag Verfahren zur Schutzgaserzeugung für einen Wärmebehandlungsofen und Wärmebehandlungsanlage
DE19738653A1 (de) * 1997-09-04 1999-03-11 Messer Griesheim Gmbh Verfahren und Vorrichtung zur Wärmebehandlung von Teilen
DE10023409A1 (de) * 2000-05-12 2001-11-15 Linde Gas Ag Gasgenerator und Verfahren zur Erzeugung eines CO- und H2-haltigen Behandlungsgases für die Wärmebehandlung von metallischem Gut sowie Wärmebehandlungsanlage mit einem Gasgenerator

Also Published As

Publication number Publication date
DE502004010812D1 (de) 2010-04-08
WO2005035799A1 (fr) 2005-04-21
PL1673483T3 (pl) 2010-12-31
ES2341861T3 (es) 2010-06-29
EP1673483B8 (fr) 2010-08-11
DE10347312B3 (de) 2005-04-14
EP1673483A1 (fr) 2006-06-28
ATE458837T1 (de) 2010-03-15

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