EP2336372A2 - Procédé et dispositif de réglage de gaz de procédé pour des traitements à chaud de matériaux/pièces métalliques dans des fours industriels - Google Patents

Procédé et dispositif de réglage de gaz de procédé pour des traitements à chaud de matériaux/pièces métalliques dans des fours industriels Download PDF

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Publication number
EP2336372A2
EP2336372A2 EP10015290A EP10015290A EP2336372A2 EP 2336372 A2 EP2336372 A2 EP 2336372A2 EP 10015290 A EP10015290 A EP 10015290A EP 10015290 A EP10015290 A EP 10015290A EP 2336372 A2 EP2336372 A2 EP 2336372A2
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EP
European Patent Office
Prior art keywords
gas
pressure
valve
furnace
controlled
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
Application number
EP10015290A
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German (de)
English (en)
Other versions
EP2336372B1 (fr
EP2336372A3 (fr
Inventor
Hendrik Dr. Grobler
Bernd Dr. Edenhofer
Jens Bechthold
Thomas Eversmann
Dirk Joritz
Nils Bernhagen
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Ipsen International GmbH
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Ipsen International GmbH
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Publication of EP2336372A3 publication Critical patent/EP2336372A3/fr
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Publication of EP2336372B1 publication Critical patent/EP2336372B1/fr
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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
    • C21D11/00—Process control or regulation for heat treatments
    • 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
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/20—Carburising

Definitions

  • the invention relates to a method and a device for controlling process gases for heat treatment of metallic materials / workpieces in industrial furnaces having at least one treatment space, at least one Abbrandstelle with gas-tight sealable valve and a pressure control, wherein at least one component of the respective process gas in at least one process relevant Range of dimensions is processed.
  • the process effect of the gas flow in industrial furnaces has been improved by supplying a hydrocarbon as required for carburization and protecting the C potential in the shielding gas and eliminating non-controllable and / or undesired reactions in order to save protective gas and reduce heating energy losses.
  • the components of carbon dioxide, oxygen and water vapor with a supplied hydrocarbon back to carbon monoxide and hydrogen, namely catalytically supported.
  • the reprocessing of already "spent" inert gas, ie a protective gas with a low C potential is achieved.
  • the C potential regulation takes place in the processing chamber of the treatment chamber.
  • the "treated" protective gas can then be fed back into the treatment chamber at one or more points, so that a real cycle process for the gas carburization sets.
  • the protective gas is no longer burned regularly, but fed back to the heating chamber by recirculation, after it has undergone an intermediate step, the treatment in an internal or external treatment room. It is thus no longer flushed as before, but reused.
  • the invention has for its object to provide a method and a device for controlling process gases for heat treatment of metallic materials / workpieces in industrial ovens of the type mentioned, in which the Abbrandstelle is opened only depending on process gas related needs, in compliance both the safety as well as the process gas-saving conditions, this being solved by an arrangement of valves and valves, which release different and process-related burn rates.
  • the rinsing fumigation (cf step one) can be activated and adjusted.
  • the method is further developed in that at a large pressure increase in a fifth step, a pressure flap of Abbrandstelle controlled to release pressure over a fixed limit is opened.
  • the process requires the setting of a C-level, it can be regulated independently of the pressure control of the furnace control by at least one C-potential controller and adjusted via a gas and air supply.
  • the method can be used for batch heat treatments or for heat treatment of metallic materials / workpieces in industrial furnaces (1) that work according to the piercing principle.
  • the activated in the fourth step Spülbegasung can be adjusted before a batch movement, a batch change or the loading of a batch.
  • the controlled Spülbegasung can be activated until a purge time expired or a selected CO content is reached.
  • the purge purge request may be initiated from the furnace control to relieve the furnace chamber of foreign gas residuals.
  • the method is particularly suited for use in inert gas recirculation systems where, for gas carburization in an internal or external processing room of the industrial furnace, the components carbon dioxide, oxygen and water vapor react with a hydrocarbon feed to recirculate carbon monoxide and hydrogen.
  • an overpressure flap of the burn-off point is opened, which in itself is ideally closed in a gastight manner during steps one to four.
  • the mentioned processing space of the industrial furnace can be used both in accordance with DE 10 2008 029 001.7 B1 internally or according to the DE 10 2009 038 598.3 be formed externally, wherein the latter is a generation and enrichment of a protective gas as a separate preparation and separated from the batch.
  • the gastight sealable overpressure flap of Abbrandstelle for controlled pressure reduction completes the device.
  • a manual valve is provided in order to generate an at least necessary for the maintenance of the atmospheric composition loss gas by gas erosion.
  • the device comprises valves as solenoid valves or adjustable valves, which are controlled depending on the process state in the oven and release the flow to Abbrandstelle. In different combustion strands so different amounts of gas can be burned. Depending on the program step, furnace pressure and the atmosphere composition, different valves are activated and so only the minimum required amount of gas is burned off. In the event of a malfunction, all valves release the passage and thus enable a quick rinsing out of the oven chamber.
  • the furnace pressure regulation takes place via the controlled addition of a gas mixture. Normally, the burning point is closed by means of the overpressure flap. For pressure control, the furnace pressure is constantly detected and fed to the required for holding the pressure mixture amount.
  • the maximum possible gas mixture quantity is supplied when a minimum furnace pressure is not reached until a set opening time of the valves has expired or a preset furnace pressure has been reached.
  • the control of the Abbrandventile takes place here analogous to the furnace pressure control.
  • FIG. 1 is shown schematically in one embodiment, an industrial furnace 1 with a treatment room 2.
  • the treatment chamber 2 is connected to a control 5 via a pressure gauge 5.1 in connection, the control 5 both request signals for a Spülbegasung from a conventional furnace control 9 and receives signals from a C-potential controller 3 and the pressure gauge 5.1 on the furnace pressure. Furthermore, the controller 5 receives values from a CO analyzer 8.
  • the control gives signals for opening or closing a, e.g. as a solenoid valve Abbrandventils 4.1, a Abbrandstelle 4 and signals of a. when . Solenoid valve running fresh gas valve. 7
  • rinsing fumigation (see step 1) is activated and regulated before, for example, door and batch movement.
  • an overpressure flap 4.3 controlled to release pressure can be opened beyond a fixed limit value.
  • An associated manual valve 4.2 with shut-off valve 4.4 allows by appropriate slide positions the continuous burning of a small amount of exhaust gas.
  • the invention makes it possible that the Abbrandstelle 4 is opened only in response to process gas-related needs, in compliance with both the safety conditions and the environmentally friendly saving of process gases.
EP10015290.9A 2009-12-16 2010-12-03 Procédé et dispositif de réglage de gaz de procédé pour des traitements à chaud de matériaux/pièces métalliques dans des fours industriels Active EP2336372B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009005864 2009-12-16

Publications (3)

Publication Number Publication Date
EP2336372A2 true EP2336372A2 (fr) 2011-06-22
EP2336372A3 EP2336372A3 (fr) 2013-10-02
EP2336372B1 EP2336372B1 (fr) 2016-03-02

Family

ID=43759652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10015290.9A Active EP2336372B1 (fr) 2009-12-16 2010-12-03 Procédé et dispositif de réglage de gaz de procédé pour des traitements à chaud de matériaux/pièces métalliques dans des fours industriels

Country Status (2)

Country Link
EP (1) EP2336372B1 (fr)
PL (1) PL2336372T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107099651A (zh) * 2017-05-16 2017-08-29 浙江久立特材科技股份有限公司 一种全氢保护气辊底炉氢气流量控制的方法及系统
CN114507777A (zh) * 2020-11-16 2022-05-17 上海梅山钢铁股份有限公司 一种卧式退火炉炉压控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6162077B2 (ja) * 2014-06-11 2017-07-12 日本碍子株式会社 熱処理炉

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008029001B3 (de) * 2008-06-20 2009-09-17 Ipsen International Gmbh Verfahren und Einrichtung zur Wärmebehandlung von metallischen Werkstoffen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107099651A (zh) * 2017-05-16 2017-08-29 浙江久立特材科技股份有限公司 一种全氢保护气辊底炉氢气流量控制的方法及系统
CN114507777A (zh) * 2020-11-16 2022-05-17 上海梅山钢铁股份有限公司 一种卧式退火炉炉压控制方法
CN114507777B (zh) * 2020-11-16 2024-01-05 上海梅山钢铁股份有限公司 一种卧式退火炉炉压控制方法

Also Published As

Publication number Publication date
EP2336372B1 (fr) 2016-03-02
EP2336372A3 (fr) 2013-10-02
PL2336372T3 (pl) 2016-09-30

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