ATE202385T1 - METHOD FOR EMBROIDERING THE EDGE LAYER OF METALLIC WORKPIECES - Google Patents

METHOD FOR EMBROIDERING THE EDGE LAYER OF METALLIC WORKPIECES

Info

Publication number
ATE202385T1
ATE202385T1 AT98108307T AT98108307T ATE202385T1 AT E202385 T1 ATE202385 T1 AT E202385T1 AT 98108307 T AT98108307 T AT 98108307T AT 98108307 T AT98108307 T AT 98108307T AT E202385 T1 ATE202385 T1 AT E202385T1
Authority
AT
Austria
Prior art keywords
embroidering
partial pressure
edge layer
metallic workpieces
stages
Prior art date
Application number
AT98108307T
Other languages
German (de)
Inventor
Jan Willem Bouwman
Original Assignee
Ipsen Int 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 Ipsen Int Gmbh filed Critical Ipsen Int Gmbh
Application granted granted Critical
Publication of ATE202385T1 publication Critical patent/ATE202385T1/en

Links

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
    • C23C8/24—Nitriding

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)
  • Automatic Embroidering For Embroidered Or Tufted Products (AREA)

Abstract

In the gas nitriding of metal workpieces at 1000-1200 degrees C, the nitrogen partial pressure of the gas atmosphere during nitriding is adjusted in two stages of predetermined duration. In the first stage, the partial pressure is above the theoretical equilibrium pressure required to achieve the target case nitrogen content. In the second stage (diffusion phase), the partial pressure is equal to the theoretical equilibrium pressure. Preferably, the first and second stages have durations chosen according to the desired case nitrogen content and are especially of equal duration.
AT98108307T 1997-07-12 1998-05-07 METHOD FOR EMBROIDERING THE EDGE LAYER OF METALLIC WORKPIECES ATE202385T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19729984A DE19729984A1 (en) 1997-07-12 1997-07-12 Process for embroidering the edge layer of metallic workpieces

Publications (1)

Publication Number Publication Date
ATE202385T1 true ATE202385T1 (en) 2001-07-15

Family

ID=7835556

Family Applications (1)

Application Number Title Priority Date Filing Date
AT98108307T ATE202385T1 (en) 1997-07-12 1998-05-07 METHOD FOR EMBROIDERING THE EDGE LAYER OF METALLIC WORKPIECES

Country Status (3)

Country Link
EP (1) EP0890656B1 (en)
AT (1) ATE202385T1 (en)
DE (2) DE19729984A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011077368A1 (en) 2011-06-10 2012-12-13 BSH Bosch und Siemens Hausgeräte GmbH Domestic appliance e.g. refrigerator used in kitchen, has side wall and door lining whose surface is heat-treated with nitrogen containing gas atmosphere at specific temperature
DE102011105426B4 (en) * 2011-06-22 2013-03-28 Mt Aerospace Ag Pressure vessel for receiving and storing cryogenic fluids, in particular cryogenic fluids, and method for its production and its use
CN106637058B (en) * 2016-12-21 2019-06-25 机械科学研究总院青岛分院有限公司 A kind of low temperature gas nitriding process of austenitic stainless steel
CN106637059B (en) * 2016-12-21 2019-03-05 机械科学研究总院青岛分院有限公司 A kind of catalysis process of low temperature gas nitriding

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4333917C2 (en) * 1993-10-05 1994-06-23 Hans Prof Dr Ing Berns Edge embroidery to create a high-strength austenitic surface layer in stainless steels

Also Published As

Publication number Publication date
DE19729984A1 (en) 1999-01-14
EP0890656A1 (en) 1999-01-13
DE59800880D1 (en) 2001-07-26
EP0890656B1 (en) 2001-06-20

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