EP0829554B2 - Installation pour la cémentation à basse pression avec des compartiments disposés les unes après les autres - Google Patents

Installation pour la cémentation à basse pression avec des compartiments disposés les unes après les autres Download PDF

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Publication number
EP0829554B2
EP0829554B2 EP97890166A EP97890166A EP0829554B2 EP 0829554 B2 EP0829554 B2 EP 0829554B2 EP 97890166 A EP97890166 A EP 97890166A EP 97890166 A EP97890166 A EP 97890166A EP 0829554 B2 EP0829554 B2 EP 0829554B2
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EP
European Patent Office
Prior art keywords
chamber
gas
plant according
pressure
carbonisation
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
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EP97890166A
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German (de)
English (en)
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EP0829554A1 (fr
EP0829554B1 (fr
Inventor
Herwig Dr. Altena
Johann Ing. Berger
Josef Ing. Krickl
Gerhard Oberweger
Gerhard Ing. Sack
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ALD AICHELIN GesmbH
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ALD AICHELIN GesmbH
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    • 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
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • 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
    • C23C8/22—Carburising of ferrous surfaces

Definitions

  • the invention relates to a low pressure carburizing plant with several in a row arranged chambers through which the batches by means of Transport organs are moved.
  • Roller hearth continuous ovens are already known in which a gas cooling section between a Annealing and a hardening zone is provided (DE 42 28 006). There are also carburizing plants where carburization in the range of 0.1-60 kPa abs. (1 - 600 mbar abs.) is already known.
  • a reversal of the batch by rolling motion in the area of the quenching chamber is cooling with liquid media and 2-phase flows (DE 44 01 228) is already known and can also be used for gases applied to the uniformity of deterrence to improve.
  • the cross-sectional area by the cooling gas is coated, increased by reversing the batch must be what at the expense of gas velocity or the cooling rate at a given, maximum Engine power goes.
  • This disadvantage is invented thereby avoided that a movable gas control system installed in the quenching chamber and shared is moved with the batch, whereby the of cross-section flowed through the gas flow always the base area of the batch equivalent.
  • the drive of the gas control system is preferably carried out via an electric motor Roller drive with the help of a translation.
  • roller conveyor Another disadvantage of the roller conveyor can be result from the fact that the roles according to the state of the art through the insulation, stored outside the insulation and outside the Boilers are driven, resulting in a non-negligible Heat dissipation through heat conduction leads over the transport rollers. On the one hand, this causes one higher energy requirements of the plant and deteriorated on the other hand, the temperature uniformity in the Treatment chambers.
  • the Transport rollers according to the invention by ceramic or Graphite bearings held within the hot heating, Carburizing and diffusion chamber and that rest on the underlying insulation.
  • the implementation to the transport engine is only carried out with a thin drive shaft that has no bending moment must transfer. Through these measures, the Minimized energy losses.
  • the transport rollers in the heating, carburizing and Diffusion zone can be designed as a hollow cylinder in the an electric beam element or a gas burner is introduced and flange-mounted using a rotating union, whereby the total number of executions in the Heating, carburizing and diffusion chambers reduced becomes.
  • a roller hearth tempering furnace downstream.
  • Fig. 1 in elevation a low-pressure carburizing plant according to the invention
  • Fig. 2 is a top view of the low pressure carburizing plant 1
  • FIGS. 3 and 4 cross sections of a usable within the scope of the invention
  • Quenching. 5, 6 and 7 give design variants the transport rollers again.
  • the batches 4 are in front of the system Loading roller table 1 arranged. From this loading roller table 1, the batches 4 enter an entry lock 6, which is vacuum-tight and can be evacuated. On the lock 6 closes a likewise evacuable heating chamber 7 on. Be in this heating chamber 7 the batches under nitrogen at a pressure of 1 to Heated up to 2 bar. The heating chamber 7 is vacuum tight Provide inlet and outlet doors, the heating batches 4 are made with circulators 8 and an electric one Helix heater 9.
  • two separate carburizing chambers 10 and 11 are arranged.
  • these carburizing chambers 10 and 11 is abs at a pressure of 0.1 to 60kPa. (1 to 600 mbar abs.), preferably in the range from 1 to 3 kPa abs. (10 to 30 mbar abs.) Carburized with carburizing gas.
  • the arrangement of two separate carburizing chambers enables different parameters for the beginning and the end of the carburization as well as one Increase throughput. Within the scope of the invention is, however, the arrangement of only one carburizing chamber possible.
  • both carburizing chambers 10 and 11 are heated with jacket pipes 12th
  • the batches 4 enter a quenching chamber 17 for high pressure gas quenching.
  • the structure of the quench chamber 17 is shown of Fig. 3 explained.
  • the transport of the batches 4 through the invention System is, as in particular from Fig. 1 can be seen, carried out by a roller conveyor 22, which is a slow, horizontal pendulum movement of the Charge during heating, carburizing and quenching to even out the treatment result allows.
  • FIG. 3 A preferred design of the quenching chamber 17 is shown in section in FIG. 3.
  • a motor 32 is placed on a housing 31, which drives a fan wheel 33.
  • the batch 4 is on the transport rollers 22.
  • the jacket expands at the top and inside the enlarged part 37 is a Heat exchanger 38 arranged. This heat exchanger 38, however, does not take up the entire space of part 37 of the jacket, so that a free cross section 39 is formed.
  • the fan wheel 33 promotes nitrogen gas in the Meaning of the arrows entered outside the jacket 34, 37 downwards, where it is deflected by 90 ° and upwards cooling the charge 4 past it sweeps. Then the cooling gas flows through to Part of the heat exchanger 38, part of the free cross section 39, taking the two streams before entering reunite in the fan wheel 33.
  • the transport rollers 22 of the quenching chamber 17 allow the batch to be reversed by horizontal Pendulum movement, which ensures uniformity deterrence can be improved.
  • the in Movable gas guide device located in the batch room 35 limits the area covered by the cooling gas largely on the batch area and leads the free cross section with the batch. This prevents that the cooling gas alternately in front and behind the batch flows past if this during cooling is reversibly reversed.
  • the movement of the Gas guiding device can preferably be via the roller drive respectively.
  • Other solutions, such as the postponement by means of pneumatic cylinders are also possible.
  • the transport rollers 22 are here according to the invention by ceramic or graphite bearings 42 held within the hot heating, Carburizing and diffusion chamber 43 are located and which lie on the underlying insulation 44.
  • Several transport rollers are driven by a chain drive connected outside the heating chamber.
  • FIG. 7 Another embodiment variant is shown in FIG. 7 shown.
  • the transport rollers in the Heating, carburizing and diffusion zone as a hollow Cylinder 47 can be designed in which an electric heating element or gas burner is introduced and by means of a rotary union 48 are flanged. Thereby the total number of executions in the heating, carburizing and diffusion chambers are reduced.
  • the quenching chamber 17 executed with lowerable transport rollers be the batch on a fixed batch carrier settle the number of carburizing chambers could be of two and the number of diffusion chambers deviate from three.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Tunnel Furnaces (AREA)

Claims (8)

  1. Installation de cémentation au carbone à basse pression, comprenant plusieurs chambres disposées les unes à la suite des autres, que les charges traversent à l'intervention d'organes de transport, installation définie par la combinaison des caractéristiques suivantes, connues an soi:
    les organes de transport sont réalisés sous forme de transporteur à rouleaux (22) qui fait passer les charges (4) successivement par
    un sas d'introduction (6) étanche au vide,
    une chambre de chauffage (7) pouvant être mise sous vide, dans laquelle les charges (4) peuvent être chauffées sous atmosphère d'azote à 100 à 200 kPa (1 à 2 bar),
    au moins une chambre de cémentation au carbone (10, 11) pour carburation à une pression de 0,1 à 60 kPa abs. (1 à 600 mbar abs.), de préférence de 1 à 3 kPa abs. (10 à 30 mbar abs.), avec du gaz de carburation,
    au moins une chambre de diffusion (13, 14), et
    une chambre de trempe (17) pour une trempe au gaz à haute pression,
    le chauffage de la chambre de cémentation au carbone à basse pression et/ou la chambre de diffusion se fait par des tubes radiants chemisés, de préférence des tubes radiants électriques ou des tubes radiants au gaz,
    les rouleaux (22) sont maintenus dans l'enceinte d'enfournement dans des roulements en céramique ou en graphite (42) qui peuvent encaisser le couple de flexion et qui prennent appui sur le dispositif d'isolation (44) sous-jacent.
  2. Installation suivant la revendication 1, dans laquelle les rouleaux de la bande transporteuse à rouleaux (22) sont déplaçables à la manière d'un pendule.
  3. Installation suivant la revendication 1, dans laquelle un disposition déflecteur de gaz mobile (35) se trouvant dans l'enceinte d'enfournement limite la surface en contact avec le gaz de refroidissement à la surface de base de la charge et entraíne la section transversale libre avec la charge.
  4. Installation suivant la revendication 3, dans laquelle le dispositif déflecteur de gaz (35) est mis en mouvement via la commande des rouleaux.
  5. Installation suivant la revendication 3, dans laquelle le dispositif déflecteur de gaz (35) est mis en mouvement au moyen de vérins pneumatiques.
  6. Installation suivant l'une des revendications 1 à 5, dans laquelle un four de revenu à galets (19) fait suite à la chambre de trempe (17).
  7. Installation suivant l'une des revendications 1 à 6, dans laquelle deux chambres de cémentation au carbone séparées (10, 11) sont agencées l'une à la suite de l'autre.
  8. Installation suivant l'une des revendications 1 à 7, dans laquelle les rouleaux prennent la forme de cylindres creux (47) dans lesquels les éléments radiants électriques sont engagés et retenus par un passage tournant (48).
EP97890166A 1996-09-16 1997-08-19 Installation pour la cémentation à basse pression avec des compartiments disposés les unes après les autres Expired - Lifetime EP0829554B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT163596 1996-09-16
AT0163596A AT404029B (de) 1996-09-16 1996-09-16 Niederdruck-aufkohlungsanlage
AT1635/96 1996-09-16

Publications (3)

Publication Number Publication Date
EP0829554A1 EP0829554A1 (fr) 1998-03-18
EP0829554B1 EP0829554B1 (fr) 2000-04-26
EP0829554B2 true EP0829554B2 (fr) 2004-05-12

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ID=3517678

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Application Number Title Priority Date Filing Date
EP97890166A Expired - Lifetime EP0829554B2 (fr) 1996-09-16 1997-08-19 Installation pour la cémentation à basse pression avec des compartiments disposés les unes après les autres

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Country Link
EP (1) EP0829554B2 (fr)
AT (1) AT404029B (fr)
DE (1) DE59701501D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4540406B2 (ja) * 2004-06-25 2010-09-08 富士重工業株式会社 多段連続浸炭焼入れ炉及び連続浸炭焼入れ方法
DE102008020449A1 (de) * 2008-04-01 2009-10-15 Manfred Husslein Industrieofen sowie Verfahren zum Betrieb eines Industrieofens
CN108315544A (zh) * 2018-04-08 2018-07-24 亚捷科技（唐山）股份有限公司 一种氨基气氛辊棒炉生产系统
CN110835722B (zh) * 2019-11-27 2023-08-25 特诺恩技术（天津）有限公司 一种用于齿轮渗碳热处理的滑动密封炉门
CN110846612A (zh) * 2019-12-03 2020-02-28 上海丰东热处理工程有限公司 一种真空渗碳热处理加工工艺
CN114293136A (zh) * 2021-12-31 2022-04-08 重庆市星极齿轮有限责任公司 一种工件热处理系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055852U (ja) † 1991-07-02 1993-01-26 中外炉工業株式会社 多室式ローラハース型イオン浸炭炉

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Publication number Priority date Publication date Assignee Title
GB1208134A (en) * 1967-03-22 1970-10-07 Gibbons Brothers Ltd Improvements in or relating to continuous carburising
US3662996A (en) * 1970-03-23 1972-05-16 Holcroft & Co Multi-chamber carburizing apparatus
JPS58130270A (ja) * 1982-01-27 1983-08-03 Michio Sugiyama 連続真空浸炭炉とその操業方法
JPS60138065A (ja) * 1983-12-27 1985-07-22 Chugai Ro Kogyo Kaisha Ltd ガス浸炭焼入方法およびその連続式ガス浸炭焼入設備
JPS60190511A (ja) * 1984-03-13 1985-09-28 Ishikawajima Harima Heavy Ind Co Ltd 金属熱処理設備
FR2678287B1 (fr) * 1991-06-26 1993-10-29 Etudes Constructions Mecaniques Procede et four de cementation a basse pression.
FR2681332B1 (fr) * 1991-09-13 1994-06-10 Innovatique Sa Procede et dispositif de cementation d'un acier dans une atmosphere a basse pression.
DE69310897T2 (de) * 1992-10-15 1998-01-08 Kawasaki Steel Co Verfahren zur kontinuierlichen aufkohlung eines stahlbandes
JP3448789B2 (ja) * 1995-01-20 2003-09-22 同和鉱業株式会社 ガス浸炭方法
DE29505496U1 (de) * 1995-03-31 1995-06-01 Ipsen Industries International GmbH, 47533 Kleve Vorrichtung zur Wärmebehandlung metallischer Werkstücke unter Vakuum

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Publication number Priority date Publication date Assignee Title
JPH055852U (ja) † 1991-07-02 1993-01-26 中外炉工業株式会社 多室式ローラハース型イオン浸炭炉

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Title
Angebot Fa. Ipsen EN-05.3647.A vom 12.12.1995 †
Angebot Fa. Ipsen EN-05.3647.B vom 15.08.1996 †
B. Edenhofer: "Carburizing and Nitriding Industry in the Eastern Hemisphere", Proceedings of the Second International Conference on Carburizing and Nitriding with Atmospheres, 06.-12.12.1995, Cleveland (US), Seiten 3-8 †
Besprechungsbericht (bzgl. Fa. Bosch) vom 07.03.1996 †
Besuchsbericht (bzgl. Fa. Bosch) vom 13./14.12.1995 †
Datenblatt No. 771 der Fa. C. I. Hayes Inc. †
Datenblatt No. 821 der Fa. C. I. Hayes Inc. †
Firmendruckschrift "The Solution" 1/96 †
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Metallurgia, Mai 1986, D.H. Herring et al.: "Vacuum Carburizing Developments", Seiten 169, 171, 172 †
Rechnung "Rechn./Lieferschein Nr. 16730096", 10.10.1998 †
Telefax der ALD Vacuum Technologies GmbH, Erlensee (DE) an Herrn Berger, 07.10.1996 †
Verkaufs- und Lieferbedingungen der IPSEN INTERNATIONAL GMBH KLEVE †

Also Published As

Publication number Publication date
EP0829554A1 (fr) 1998-03-18
EP0829554B1 (fr) 2000-04-26
AT404029B (de) 1998-07-27
ATA163596A (de) 1997-12-15
DE59701501D1 (de) 2000-05-31

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