EP2135961A2 - Procédé et dispositif destinés au traitement à chaud de matières métalliques sous atmosphère protectrice - Google Patents

Procédé et dispositif destinés au traitement à chaud de matières métalliques sous atmosphère protectrice Download PDF

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Publication number
EP2135961A2
EP2135961A2 EP20090007348 EP09007348A EP2135961A2 EP 2135961 A2 EP2135961 A2 EP 2135961A2 EP 20090007348 EP20090007348 EP 20090007348 EP 09007348 A EP09007348 A EP 09007348A EP 2135961 A2 EP2135961 A2 EP 2135961A2
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EP
European Patent Office
Prior art keywords
gas
chamber
treatment
potential
catalyst bed
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
EP20090007348
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German (de)
English (en)
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EP2135961A3 (fr
EP2135961B1 (fr
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Erfindernennung liegt noch nicht vor Die
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Ipsen International GmbH
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Ipsen International GmbH
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Priority to PL09007348T priority Critical patent/PL2135961T3/pl
Publication of EP2135961A2 publication Critical patent/EP2135961A2/fr
Publication of EP2135961A3 publication Critical patent/EP2135961A3/fr
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Publication of EP2135961B1 publication Critical patent/EP2135961B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • 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
    • 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
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • 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

Definitions

  • the invention relates to a method and a device for heat treatment of metallic materials in an industrial furnace comprising a heating chamber with a treatment chamber and a quenching chamber using protective gas and reaction gas.
  • U. a. are in the DE 36 32 577 Catalyst beds, in the DE 38 88 814 Catalyst-like linings with net-like structures of furnaces, in the DE 40 05 710 Ni, Mn, Cr. Fe-containing full metallic oxidation catalysts and in the DE 44 16 469 a two-stage nitrocarburizing by Ni o. Cu catalyst described.
  • the practice of the heat treatment of metallic materials under inert gas as in the gas carburizing arranges so that the heat treatment furnace is fumigated with a reducing inert gas.
  • This shielding gas usually consists of carbon monoxide, hydrogen, water vapor, carbon dioxide and nitrogen.
  • the fumigation introduction takes place in the heating chamber.
  • a cold treatment chamber is connected to this heating chamber as a so-called quenching chamber. Separately, both chambers are usually through a gas-permeable door.
  • the gas fed into the heating chamber thus also enters the cold treatment chamber. From this, the protective gas is then discharged at a burn-off point, safely ignited by a pilot burner and burned.
  • the catalyst used on the catalyst bed should advantageously have nickel, platinum, palladium or rhodium.
  • Natural gas is used as reaction gas.
  • gas enrichment takes place at the catalyst bed according to the reactions 2CH 4 + O 2 ⁇ 2CO + 4H 2 CH 4 + CO 2 ⁇ 2CO + 2H 2 CH 4 + H 2 O ⁇ CO + 3H 2 instead, where the C potential increases and vol.% CO 2 , H 2 O and O 2 fall off.
  • the C potential (carbon potential) is always controlled by means of gas analysis and temperature measurement.
  • air and hydrocarbon gas are used so that an amount of air is supplied when the C potential is to decrease; when the C potential is increased, hydrocarbon gas is supplied.
  • the C potential present in the treatment chamber of the heating chamber is regulated after the feed of the hydrocarbon at the catalyst bed.
  • the C potential present in the treatment chamber of the heating chamber is regulated by feeding the hydrocarbon into the treatment space, the hydrocarbon reacting in a recirculating manner on the catalyst bed.
  • the shielding gas is then conducted to a burn-off point, ignited and burned off when there is an impermissible pressure rise, thus regulating the operating pressure, or when a brief flushing process requires it.
  • the working pressure is preferably 1 to 10 mbar.
  • reaction gas and air or inert gas can be supplied accordingly. Any resulting excess of H 2 is separated.
  • the method provides that a forced circulating gas guide is carried out, which is largely isothermal to avoid undesirable reactions such as soot formation.
  • the forcibly recirculated gas guide can be carried out by means of recirculating gas removal from the region of the heating chamber without gas cooling or alternatively by means of recirculating gas removal from the region of the quenching chamber.
  • a heating chamber for the quenching chamber gas-tight final interior door is arranged.
  • a gas-tight closing inner door is arranged between the heating chamber and the quenching chamber, in which case the quenching chamber must have a gas-tight outer door.
  • the treatment room has first feed points for the feeding of the recovered protective gas and / or the feed of the hydrocarbon.
  • the treatment room has second feed points for the feed of the hydrocarbon.
  • the treatment room with catalyst bed can be locally separated from the treatment room.
  • the C-potential controller comprises an O 2 probe, a CO analyzer and a temperature gauge.
  • the invention thus aims at a novel inert gas recirculation system for gas carburizing in which the components carbon dioxide, oxygen and water vapor are reacted with a hydrocarbon feed, e.g. Natural gas again catalytically react to carbon monoxide and hydrogen.
  • a hydrocarbon feed e.g. Natural gas again catalytically react to carbon monoxide and hydrogen.
  • the alternatively shown C-potential control can be carried out advantageously by means of atmospheric analysis.
  • the "treated" inert gas can then be fed back to the feed points, so that sets a real cycle and gas carburizing is continued.
  • the device-side requirements for this recirculation system can be met depending on the process variant by a gas-tight inner door or a gas-tight outer door.
  • the burn-off by means of a gas-tight valve must still open in case of impermissible pressure increases in the furnace in order to regulate the operating pressure.
  • the working pressure should be between 10 and 100 mmWS or 1 to 10 mbar.
  • Natural gas and air or inert gas are supplied in an appropriate amount.
  • Another advantage is the control of the C potential according to the disclosed variants. Carburization of components due to immediate hydrocarbon dissociation is therefore excluded.
  • the gas routing may be largely isothermal to avoid undesirable reactions such as e.g. To avoid soot.
  • C-potential regulated in situ catalytic gas generation in combination with flow recirculation in a heat treatment furnace functionally fuses to a surprisingly novel effect with the illustrated beneficial effects.
  • the method is typical that in detail the process steps of the heat treatment are associated with the stages of inert gas recovery.
  • the drawing shows a simplified representation of an industrial furnace with schematic superimposition of the reaction sequences of the method and features of the invention essential to a construction variant of the device.
  • the drawing outlines, in a simplified representation, an industrial furnace 1 which is used in practice and which comprises a heating chamber 2 with a treatment space 2.1 and a treatment space 3 with a catalyst bed 3.1 and an associated quenching chamber 8.
  • the treatment room 3 with catalyst bed 3.1 is in this example structurally connected to the treatment room 2.1, but it may be locally separated and functionally assigned, which construction is not shown here.
  • the materials and constructions known from the known state of the art can be used, such as the systems of catalysts known from the automotive industry.
  • Said components form a functional control loop R, which is essential to the invention.
  • a gas-tight inner door 7 between the heating chamber and subsequent quenching chamber 8 In this example, for a recirculating gas removal from the area of the heating chamber 2 without gas cooling, a gas-tight inner door 7 between the heating chamber and subsequent quenching chamber 8.
  • the inner door 7 In a construction variant, not shown here is at a gas extraction from the area of the quenching chamber 8, the inner door 7 arranged gas-tight closing between the heating chamber 2 and quenching chamber 8, but provided the quenching chamber 8 with a gas-tight closing outer door 9.
  • Both construction variants are also essential to the invention compared with the so-called open systems described in the prior art, such as with gas-permeable doors, and also support the system of the control loop R in its function according to the method.
  • the catalyst bed 3.1 having processing space 3 of the industrial furnace 1 react the supplied as protective gas components carbon dioxide, oxygen and water vapor with a supplied reaction gas such as natural gas to carbon monoxide and hydrogen catalytically.
  • the C potential is regulated by means of the C potential regulator 5 with O 2 probe 5.1, CO analyzer 5.2 and temperature meter 5.3 in such a way that the treated inert gas can be recirculated to the treatment space 2.1 at first feed points 2.2.
  • the regulation of the C potential present in the treatment space 2.1 is also provided after feeding of the hydrocarbon via the second feed points 3.2 to the catalyst bed 3.1, in order to set the C potential according to need.
  • the regulation of the present in the treatment chamber 2.1 C potential can alternatively be done after feeding of the hydrocarbon via the first feed points 2.2 in the treatment chamber 2.1 and thereby react the hydrocarbon at the catalyst bed 3.1 recirculating.
  • the protective gas can then be conducted, ignited and burned off to a burn-off point 6 if the burn-off must take place in the event of impermissible pressure increases in order to regulate the operating pressure or if a brief rinsing process requires this.
  • the treatment chamber must be rinsed to remove process-damaging foreign matter or to perform a gas exchange in the process, when e.g. the C-potetial should be lowered rapidly from 1.3% C to 0.6% C
  • the working pressure may preferably be 1 to 10 mbar, whereby higher pressures are possible.
  • reaction gas e.g. Natural gas 10 and 11 air or inert gas are supplied accordingly.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Furnace Details (AREA)
  • Catalysts (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP20090007348 2008-06-20 2009-06-03 Procédé et dispositif destinés au traitement à chaud de matières métalliques sous atmosphère protectrice Active EP2135961B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09007348T PL2135961T3 (pl) 2008-06-20 2009-06-03 Sposób i urządzenie do obróbki cieplnej materiałów metalowych w atmosferze gazu ochronnego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810029001 DE102008029001B3 (de) 2008-06-20 2008-06-20 Verfahren und Einrichtung zur Wärmebehandlung von metallischen Werkstoffen

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
DE102008029001 Previously-Filed-Application 2008-06-20

Publications (3)

Publication Number Publication Date
EP2135961A2 true EP2135961A2 (fr) 2009-12-23
EP2135961A3 EP2135961A3 (fr) 2013-02-13
EP2135961B1 EP2135961B1 (fr) 2014-10-01

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EP20090007348 Active EP2135961B1 (fr) 2008-06-20 2009-06-03 Procédé et dispositif destinés au traitement à chaud de matières métalliques sous atmosphère protectrice

Country Status (7)

Country Link
US (1) US8313586B2 (fr)
EP (1) EP2135961B1 (fr)
JP (1) JP2010001567A (fr)
CN (1) CN101608294B (fr)
DE (1) DE102008029001B3 (fr)
PL (1) PL2135961T3 (fr)
RU (1) RU2009123209A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2302081A1 (fr) * 2009-08-26 2011-03-30 Ipsen International GmbH Procédé et dispositif de préparation de gaz de procédé pour des traitements à chaud de matériaux/pièces métalliques dans des fours industriels

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009014665A1 (de) 2009-03-27 2010-09-30 Ipsen International Gmbh Arbeitsverfahren und Vorrichtung zum Be-und Entladen für einem Industrieofen wie Wärmebehandlungsofen zur Wärmebehandlung von metallischen Werkstoffen
EP2336372B1 (fr) * 2009-12-16 2016-03-02 Ipsen International GmbH Procédé et dispositif de réglage de gaz de procédé pour des traitements à chaud de matériaux/pièces métalliques dans des fours industriels
DE102009058642A1 (de) * 2009-12-16 2011-06-22 Ipsen International GmbH, 47533 Verfahren und Einrichtung zur Regelung von Prozessgasen für Wärmebehandlungen von metallischen Werkstoffen/Werkstücken in Industrieöfen
JP2012087384A (ja) * 2010-10-21 2012-05-10 Ipsen Co Ltd 工業炉における金属材料／金属ワークピースの熱処理用のプロセスガスを調整する方法および装置
DE102012019653A1 (de) * 2012-10-08 2014-04-10 Ipsen International Gmbh Gasdichter schutzgasbegaster Industrieofen, insbesondere Kammerofen, Durchstoßofen, Drehherdofen oder Ringherdofen
US20170074589A1 (en) 2015-09-11 2017-03-16 Ipsen Inc. System and Method for Facilitating the Maintenance of an Industrial Furnace
DE102015117683B3 (de) 2015-10-16 2016-09-29 Wienstroth Wärmebehandlungstechnik GmbH Verfahren und Vorrichtung zur Erzeugung und Behandlung von Schutz- und/oder Reaktionsgasen zur Wärmebehandlung von Metallen
CN109539805A (zh) * 2018-11-01 2019-03-29 南京工程学院 一种冲天炉烟气的处理方法
JP7438645B2 (ja) * 2022-02-03 2024-02-27 ダイハツ工業株式会社 浸炭システム、および、金属部品の製造方法

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1069531A (en) 1963-05-09 1967-05-17 Leeds & Northrup Co Apparatus for heat-treating metals employing a carbonizing atmosphere
US3620518A (en) 1967-03-23 1971-11-16 Degussa Process and device for the treatment of surfaces of workpieces in an annealing furnace
FR2181597A1 (en) 1972-04-27 1973-12-07 Stein Surface Continuous heat treatment furnaces - with recycled furnace gases
US4294436A (en) 1979-09-05 1981-10-13 Kanto Yakin Kogyo Kabushiki Kaisha Furnace with protective atmosphere for heating metals
JPS62199761A (ja) 1986-02-25 1987-09-03 Ishikawajima Harima Heavy Ind Co Ltd 鋼の熱処理方法
DE3632577A1 (de) 1986-09-25 1988-05-05 Linde Ag Strahlrohrbrenner mit katalysatorbett fuer waermebehandlungsoefen
DE4005710C1 (en) 1990-02-23 1990-08-23 Ipsen Industries International Gmbh, 4190 Kleve, De Two=stage nitro:carburising for iron - comprises heating in furnace with catalyst in presence of methanol, ammonia and nitrogen
DE3888814T2 (de) 1987-12-23 1994-10-27 Hi Tech Ceramics Inc Mit Fasern gefüllte retikulierte Keramik, verwendet zur Auskleidung von Ofen.
DE69013997T2 (de) 1989-07-10 1995-05-24 Kanto Yakin Kogyo Katalytisches Rührwerk zum Modifizieren von Ofenatmosphären.
DE4427507C1 (de) 1994-08-03 1995-06-01 Linde Ag Verfahren zur Wärmebehandlung, insbesondere Aufkohlung, metallischer Werkstücke
DE4416469C1 (de) 1994-05-10 1995-09-07 Juergen Dr Koppe Nickel, Mangan, Chrom und Eisen enthaltender vollmetallischer Oxidationskatalysator
DE69401425T2 (de) 1993-02-24 1997-06-05 Serthel Thermischer rohrreaktor mit einem direkten durchgang
US5645808A (en) 1995-05-15 1997-07-08 E. I. Du Pont De Nemours And Company Catalytic oxidation of volatile carbon compounds
DE29908528U1 (de) 1999-05-12 1999-08-12 Linde Ag, 65189 Wiesbaden Wärmebehandlungsanlage
DE69133356T2 (de) 1990-07-03 2004-12-09 Dowa Mining Co., Ltd. Vorrichtung zur Gasaufkohlung
US20060081567A1 (en) 2002-05-08 2006-04-20 Dougherty Michael L Sr Plasma-assisted processing in a manufacturing line

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677321A (en) * 1979-11-28 1981-06-25 Kanto Yakin Kogyo Kk Energy saving type atmosphere furnace for metal heat treatment
JPS62243754A (ja) * 1986-04-15 1987-10-24 Isuzu Motors Ltd 浸炭炉雰囲気制御装置
JPH01165715A (ja) * 1987-12-21 1989-06-29 Osaka Gas Co Ltd 鋼の熱処理装置
US5298090A (en) * 1992-12-22 1994-03-29 Air Products And Chemicals, Inc. Atmospheres for heat treating non-ferrous metals and alloys
CN1126826C (zh) * 1999-08-31 2003-11-05 上海交通大学 气体渗碳炉废气循环利用的方法
CN1089372C (zh) * 1999-09-11 2002-08-21 西北轴承集团有限责任公司 直生式天然气可控气氛热处理技术
JP2002357388A (ja) * 2001-06-01 2002-12-13 Daido Steel Co Ltd 熱処理炉
JP4560779B2 (ja) * 2004-12-09 2010-10-13 株式会社Ｉｈｉ 真空浸炭装置とその方法
JP4956417B2 (ja) * 2005-02-03 2012-06-20 Ｄｏｗａサーモテック株式会社 雰囲気熱処理装置及びその運転方法

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1069531A (en) 1963-05-09 1967-05-17 Leeds & Northrup Co Apparatus for heat-treating metals employing a carbonizing atmosphere
US3620518A (en) 1967-03-23 1971-11-16 Degussa Process and device for the treatment of surfaces of workpieces in an annealing furnace
FR2181597A1 (en) 1972-04-27 1973-12-07 Stein Surface Continuous heat treatment furnaces - with recycled furnace gases
US4294436A (en) 1979-09-05 1981-10-13 Kanto Yakin Kogyo Kabushiki Kaisha Furnace with protective atmosphere for heating metals
JPS62199761A (ja) 1986-02-25 1987-09-03 Ishikawajima Harima Heavy Ind Co Ltd 鋼の熱処理方法
DE3632577A1 (de) 1986-09-25 1988-05-05 Linde Ag Strahlrohrbrenner mit katalysatorbett fuer waermebehandlungsoefen
DE3888814T2 (de) 1987-12-23 1994-10-27 Hi Tech Ceramics Inc Mit Fasern gefüllte retikulierte Keramik, verwendet zur Auskleidung von Ofen.
DE69013997T2 (de) 1989-07-10 1995-05-24 Kanto Yakin Kogyo Katalytisches Rührwerk zum Modifizieren von Ofenatmosphären.
DE4005710C1 (en) 1990-02-23 1990-08-23 Ipsen Industries International Gmbh, 4190 Kleve, De Two=stage nitro:carburising for iron - comprises heating in furnace with catalyst in presence of methanol, ammonia and nitrogen
DE69133356T2 (de) 1990-07-03 2004-12-09 Dowa Mining Co., Ltd. Vorrichtung zur Gasaufkohlung
DE69401425T2 (de) 1993-02-24 1997-06-05 Serthel Thermischer rohrreaktor mit einem direkten durchgang
DE4416469C1 (de) 1994-05-10 1995-09-07 Juergen Dr Koppe Nickel, Mangan, Chrom und Eisen enthaltender vollmetallischer Oxidationskatalysator
DE4427507C1 (de) 1994-08-03 1995-06-01 Linde Ag Verfahren zur Wärmebehandlung, insbesondere Aufkohlung, metallischer Werkstücke
US5645808A (en) 1995-05-15 1997-07-08 E. I. Du Pont De Nemours And Company Catalytic oxidation of volatile carbon compounds
DE29908528U1 (de) 1999-05-12 1999-08-12 Linde Ag, 65189 Wiesbaden Wärmebehandlungsanlage
US20060081567A1 (en) 2002-05-08 2006-04-20 Dougherty Michael L Sr Plasma-assisted processing in a manufacturing line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2302081A1 (fr) * 2009-08-26 2011-03-30 Ipsen International GmbH Procédé et dispositif de préparation de gaz de procédé pour des traitements à chaud de matériaux/pièces métalliques dans des fours industriels

Also Published As

Publication number Publication date
US20090314388A1 (en) 2009-12-24
CN101608294B (zh) 2013-10-23
EP2135961A3 (fr) 2013-02-13
CN101608294A (zh) 2009-12-23
JP2010001567A (ja) 2010-01-07
DE102008029001B3 (de) 2009-09-17
RU2009123209A (ru) 2010-12-27
PL2135961T3 (pl) 2015-03-31
EP2135961B1 (fr) 2014-10-01
US8313586B2 (en) 2012-11-20

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