EP1236810A8 - Process and apparatus for the partial thermochemical treatment of metallic workpieces - Google Patents

Process and apparatus for the partial thermochemical treatment of metallic workpieces Download PDF

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Publication number
EP1236810A8
EP1236810A8 EP02004013A EP02004013A EP1236810A8 EP 1236810 A8 EP1236810 A8 EP 1236810A8 EP 02004013 A EP02004013 A EP 02004013A EP 02004013 A EP02004013 A EP 02004013A EP 1236810 A8 EP1236810 A8 EP 1236810A8
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EP
European Patent Office
Prior art keywords
workpieces
surface areas
treatment
treated
carburizing
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.)
Withdrawn
Application number
EP02004013A
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German (de)
French (fr)
Other versions
EP1236810A1 (en
Inventor
Udo Bardelmeier
Peter Dr. Minarski
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.)
Vacuheat GmbH
Original Assignee
Vacuheat GmbH
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Filing date
Publication date
Application filed by Vacuheat GmbH filed Critical Vacuheat GmbH
Publication of EP1236810A1 publication Critical patent/EP1236810A1/en
Publication of EP1236810A8 publication Critical patent/EP1236810A8/en
Withdrawn legal-status Critical Current

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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
    • C23C8/04—Treatment of selected surface areas, e.g. using masks

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

Beim partiellen thermochemischen Vakuumbehandeln von metallischen Werkstücken (1), insbesondere beim Aufkohlen und Einsatzhärten von Werkstücken (1) aus Einsatzstahl in einer kohlenstoffhaltigen Atmosphäre, stoßen zu behandelnde Oberflächenbereiche (3, 4, 5, 6) und nicht zu behandelnde Oberflächenbereiche aneinander. Um die Oberflächenbehandlung auf die Hohlräume (2) der Werkstücke (1) zu beschränken, werden die nicht zu behandelnden äußeren Oberflächenbereiche durch wiederverwendbare zerlegbare Formkörper (11) aus einem temperaturbeständigen Material mit mindestens einem Formhohlraum (15) abgedeckt. Dabei schließt der aus einem Unterteil (12) und einem Oberteil (13) mit Öffnungen (12b, 13b) bestehende Formkörper (11) mehrere. Werkstücke (1) derart ein, daß auf den äußeren Oberflächenbereichen der werkstücke (1) keine Behandlung stattfindet. Ein elektrisch leitfähiger Formkörper (11) eignet sich insbesondere für eine thermochemische Behandlung unter Plasmaeinwirkung. Als Material für die Formkörper (11) wird Grafit oder CFC verwendet. In einem solchen Formkörper können die Werkstücke sowohl vor der Aufkohlung einem Aufheizvorgang als auch nach der Aufkohlung Vorgängen aus der Gruppe Diffusion, Gasabschrekkung und ggf. Weiterbehandlungen wie Tiefkühlung und/oder Anlassen ausgesetzt werden.

Figure 00000001
During the partial thermochemical vacuum treatment of metallic workpieces (1), in particular when carburizing and case hardening workpieces (1) made of case hardening steel in a carbon-containing atmosphere, surface areas (3, 4, 5, 6) to be treated and surface areas not to be treated come together. In order to limit the surface treatment to the cavities (2) of the workpieces (1), the outer surface areas that are not to be treated are covered by reusable, demountable molded bodies (11) made of a temperature-resistant material with at least one mold cavity (15). The molded body (11) consisting of a lower part (12) and an upper part (13) with openings (12b, 13b) closes several. Workpieces (1) in such a way that no treatment takes place on the outer surface areas of the workpieces (1). An electrically conductive molded body (11) is particularly suitable for thermochemical treatment under the influence of plasma. Graphite or CFC is used as the material for the shaped bodies (11). In such a shaped body, the workpieces can be exposed to a heating process before the carburization as well as to processes from the group of diffusion, gas quenching and possibly further treatments such as deep-freezing and / or tempering after the carburizing.
Figure 00000001
EP02004013A 2001-02-28 2002-02-27 Process and apparatus for the partial thermochemical treatment of metallic workpieces Withdrawn EP1236810A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10109565 2001-02-28
DE10109565A DE10109565B4 (en) 2001-02-28 2001-02-28 Method and device for partial thermochemical vacuum treatment of metallic workpieces

Publications (2)

Publication Number Publication Date
EP1236810A1 EP1236810A1 (en) 2002-09-04
EP1236810A8 true EP1236810A8 (en) 2003-01-02

Family

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Family Applications (1)

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EP02004013A Withdrawn EP1236810A1 (en) 2001-02-28 2002-02-27 Process and apparatus for the partial thermochemical treatment of metallic workpieces

Country Status (3)

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US (1) US6776854B2 (en)
EP (1) EP1236810A1 (en)
DE (1) DE10109565B4 (en)

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FR2863191B1 (en) * 2003-12-04 2007-04-20 Snecma Moteurs PROTECTIVE MASK FOR SURFACE TREATMENT OF TURBOMACHINE BLADES
CN101925975B (en) * 2008-01-25 2013-07-17 诺瓦提斯公司 Apparatus, carrier and method for plasma treatment of molds
DE102009004542B4 (en) 2008-12-11 2018-09-06 Bayerische Motoren Werke Aktiengesellschaft Method for producing a crankcase of an internal combustion engine
DE102009016138A1 (en) * 2009-04-03 2010-10-14 Ipsen International Gmbh Method and computer program for controlling the heat treatment of metallic workpieces
EP2462253B1 (en) * 2009-08-07 2021-04-07 Swagelok Company Low temperature carburization under soft vacuum
DE102009041041B4 (en) * 2009-09-10 2011-07-14 ALD Vacuum Technologies GmbH, 63450 Method and apparatus for hardening workpieces, as well as work hardened workpieces
US10196730B2 (en) * 2009-09-10 2019-02-05 Ald Vacuum Technologies Gmbh Method and device for hardening workpieces, and workpieces hardened according to the method
DE102010030145A1 (en) * 2010-06-16 2011-12-22 Zf Friedrichshafen Ag Reducing distortion of case hardened or carbonitrided components, comprises using hardness protection paste, which is applied before case hardening or the carbonitriding of the components on distinct regions of components
CA2861180A1 (en) 2012-01-20 2013-07-25 Swagelok Company Concurrent flow of activating gas in low temperature carburization
EP2917381B1 (en) 2012-11-07 2017-04-19 Areva Np Method for thermochemically treating a part while masking a portion and corresponding mask
RU2532777C1 (en) * 2013-04-19 2014-11-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный технический университет имени Н.Э. Баумана" (МГТУ им. Н.Э. Баумана) Combined chemical-thermal treatment of machine parts of heat-resistant steels
CN109913798B (en) * 2017-12-13 2022-12-23 维达力实业(深圳)有限公司 Surface-hardened graphite mold and surface hardening method thereof
CN109097530B (en) * 2018-08-20 2024-01-30 益发施迈茨工业炉（上海）有限公司 Vacuumizing cryogenic tempering furnace and cryogenic tempering treatment method thereof
CN111360199A (en) * 2020-04-08 2020-07-03 安徽羿维表面工程技术有限公司 Alloy composition of alloy casting side guide plate
CN111621628B (en) * 2020-06-10 2021-03-30 燕山大学 Cryogenic high-pressure torque die and method for martensitic steel
CN112899612B (en) * 2021-01-20 2023-03-17 重庆齿轮箱有限责任公司 Gear carburizing and quenching process

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US3540878A (en) * 1967-12-14 1970-11-17 Gen Electric Metallic surface treatment material
DE2523257C2 (en) * 1975-05-26 1982-10-28 Siemens AG, 1000 Berlin und 8000 München Process for coating inner surfaces of tubular hollow bodies with tantalum by chemical vapor deposition
US4165243A (en) * 1978-05-31 1979-08-21 Federal-Mogul Corporation Method of making selectively carburized forged powder metal parts
DE2851983B2 (en) * 1978-12-01 1980-11-06 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Process for carburizing hollow bodies, in particular nozzles
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FR2626068B1 (en) * 1988-01-15 1990-06-29 Mancelle Fonderie MONOBLOCK MOUNTING WITH STAGE PLATES FOR THERMAL TREATMENT OF TREES OR AXES
US4916401A (en) * 1988-05-12 1990-04-10 The Boeing Company Method and apparatus for testing fastener arcing and sparking
DE4115135C1 (en) 1991-05-08 1992-02-27 Degussa Ag, 6000 Frankfurt, De
DE4427902C1 (en) 1994-08-06 1995-03-30 Leybold Durferrit Gmbh Method for carburising components made from carburisable materials by means of a plasma discharge operated in a pulsed fashion
CN1145714C (en) 1995-03-29 2004-04-14 株式会社日本H Method and equipment for vacuum carburization and products of carburization
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Also Published As

Publication number Publication date
DE10109565B4 (en) 2005-10-20
US20030047241A1 (en) 2003-03-13
DE10109565A1 (en) 2002-09-12
EP1236810A1 (en) 2002-09-04
US6776854B2 (en) 2004-08-17

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