EP0947600A3 - Process for vacuum carburizing in a treatment furnace - Google Patents

Process for vacuum carburizing in a treatment furnace Download PDF

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Publication number
EP0947600A3
EP0947600A3 EP99100982A EP99100982A EP0947600A3 EP 0947600 A3 EP0947600 A3 EP 0947600A3 EP 99100982 A EP99100982 A EP 99100982A EP 99100982 A EP99100982 A EP 99100982A EP 0947600 A3 EP0947600 A3 EP 0947600A3
Authority
EP
European Patent Office
Prior art keywords
propane
vacuum carburizing
treatment furnace
gas
vacuum
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Withdrawn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
EP99100982A
Other languages
German (de)
French (fr)
Other versions
EP0947600A2 (en
Inventor
Günther Schmitt
Friedrich Dr. Preisser
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.)
ALD Vacuum Technologies GmbH
Original Assignee
ALD Vacuum Technologies GmbH
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 ALD Vacuum Technologies GmbH filed Critical ALD Vacuum Technologies GmbH
Publication of EP0947600A2 publication Critical patent/EP0947600A2/en
Publication of EP0947600A3 publication Critical patent/EP0947600A3/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Withdrawn legal-status Critical Current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
    • C23C8/06—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

Landscapes

  • 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

Bei einem Verfahren zur Vakuumaufkohlung unter Behandlungsgas, bei der Stahl im Grobvakuum bei Gasdrücken bis zu etwa 20 mbar unter Verwendung von Propan (C3H8) als Kohlenstoffspender bei einer Temperatur von etwa 250 °C aufgekohlt wird, wird dem Propan Wasserstoffgas (H2) in einem Verhältnis von etwa 1 : 1 bis etwa 1 : 2 (Wasserstoffüberschuß) zugemischt, wobei das Absaugen der Zersetzungsprodukte des Propans über einen mit der Behandlungskammer verbundenen Pumpstand erfolgt.In a process for vacuum carburizing under treatment gas, in which steel is carburized in a rough vacuum at gas pressures of up to about 20 mbar using propane (C 3 H 8 ) as a carbon donor at a temperature of about 250 ° C, the propane is hydrogen gas (H 2 ) in a ratio of about 1: 1 to about 1: 2 (excess hydrogen), the extraction of the decomposition products of the propane taking place via a pumping station connected to the treatment chamber.

EP99100982A 1998-04-04 1999-01-21 Process for vacuum carburizing in a treatment furnace Withdrawn EP0947600A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998115233 DE19815233A1 (en) 1998-04-04 1998-04-04 Process for vacuum carburizing under treatment gas
DE19815233 1998-04-04

Publications (2)

Publication Number Publication Date
EP0947600A2 EP0947600A2 (en) 1999-10-06
EP0947600A3 true EP0947600A3 (en) 2003-03-12

Family

ID=7863663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99100982A Withdrawn EP0947600A3 (en) 1998-04-04 1999-01-21 Process for vacuum carburizing in a treatment furnace

Country Status (3)

Country Link
EP (1) EP0947600A3 (en)
JP (1) JPH11315362A (en)
DE (1) DE19815233A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9212416B2 (en) 2009-08-07 2015-12-15 Swagelok Company Low temperature carburization under soft vacuum

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3531736B2 (en) 2001-01-19 2004-05-31 オリエンタルエンヂニアリング株式会社 Carburizing method and carburizing device
DE10209382B4 (en) * 2002-03-02 2011-04-07 Robert Bosch Gmbh Method of carburizing components
DE102004009288B4 (en) * 2004-02-26 2005-12-15 Universität Karlsruhe Exhaust gas aftertreatment during vacuum carburizing of steel
DE102005061946B4 (en) * 2004-12-27 2013-03-21 Nippon Steel Corp. Case hardened steel having excellent tooth surface fatigue strength, gear using the same, and methods of making same
US8123872B2 (en) * 2006-02-22 2012-02-28 General Electric Company Carburization process for stabilizing nickel-based superalloys
JP4551428B2 (en) * 2007-07-30 2010-09-29 正賢 劉 Method to improve surface hardness of martensitic stainless steel
KR100901572B1 (en) 2007-08-20 2009-06-08 현대자동차주식회사 Heat treatment method for annular gear
CA2861180A1 (en) 2012-01-20 2013-07-25 Swagelok Company Concurrent flow of activating gas in low temperature carburization

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1510481A (en) * 1976-04-02 1978-05-10 British Steel Corp Carburising coiled strip
US4386973A (en) * 1981-05-08 1983-06-07 General Signal Corporation Vacuum carburizing steel
US4807853A (en) * 1983-12-27 1989-02-28 Chugai Ro Co., Ltd. Continuous furnace for gas carburizing and hardening
DE4110361A1 (en) * 1991-03-28 1992-10-01 Linde Ag Carburising iron@ workpieces in gas phase process - with carbon mon:oxide to hydrogen@ ratio increased during specific phases of process to optimise carbon transfer to iron@ surface
DE4343927C1 (en) * 1993-12-22 1995-01-05 Linde Ag Method for thermal treatment of workpieces under treatment gas
EP0818555A1 (en) * 1995-03-29 1998-01-14 JH Corporation Method and equipment for vacuum carburization and products of carburization

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439614A1 (en) * 1989-08-18 1991-08-07 Vsesojuzny Nauchno-Issledovatelsky Proektno-Konstruktorsky I Tekhnologichesky Inst. Elektrotermicheskogo Oborudovania Vniieto Gas mixture for thermo-chemical treatment of metals and alloys and method of obtaining it
DE4236801A1 (en) * 1992-10-30 1994-05-05 Iva Industrieoefen Verfahren A Case-hardening of steel parts using hydrogen gas reaction - where a vacuum oven is insulated with readily available mineral fibres and is heated by radiation tubes
DE19547131A1 (en) * 1995-12-16 1997-06-19 Ipsen Ind Int Gmbh Process for plasma carburizing metallic workpieces

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1510481A (en) * 1976-04-02 1978-05-10 British Steel Corp Carburising coiled strip
US4386973A (en) * 1981-05-08 1983-06-07 General Signal Corporation Vacuum carburizing steel
US4807853A (en) * 1983-12-27 1989-02-28 Chugai Ro Co., Ltd. Continuous furnace for gas carburizing and hardening
DE4110361A1 (en) * 1991-03-28 1992-10-01 Linde Ag Carburising iron@ workpieces in gas phase process - with carbon mon:oxide to hydrogen@ ratio increased during specific phases of process to optimise carbon transfer to iron@ surface
DE4343927C1 (en) * 1993-12-22 1995-01-05 Linde Ag Method for thermal treatment of workpieces under treatment gas
EP0818555A1 (en) * 1995-03-29 1998-01-14 JH Corporation Method and equipment for vacuum carburization and products of carburization

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9212416B2 (en) 2009-08-07 2015-12-15 Swagelok Company Low temperature carburization under soft vacuum

Also Published As

Publication number Publication date
JPH11315362A (en) 1999-11-16
EP0947600A2 (en) 1999-10-06
DE19815233A1 (en) 1999-10-07

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