WO2006076220A2 - Carburation d'alliages a memoire de forme a base ferreuse - Google Patents

Carburation d'alliages a memoire de forme a base ferreuse Download PDF

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Publication number
WO2006076220A2
WO2006076220A2 PCT/US2006/000428 US2006000428W WO2006076220A2 WO 2006076220 A2 WO2006076220 A2 WO 2006076220A2 US 2006000428 W US2006000428 W US 2006000428W WO 2006076220 A2 WO2006076220 A2 WO 2006076220A2
Authority
WO
WIPO (PCT)
Prior art keywords
article
carbon
concentration
shape memory
carburization
Prior art date
Application number
PCT/US2006/000428
Other languages
English (en)
Other versions
WO2006076220A3 (fr
Inventor
Peter C. Williams
Original Assignee
Swagelok Company
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 Swagelok Company filed Critical Swagelok Company
Publication of WO2006076220A2 publication Critical patent/WO2006076220A2/fr
Publication of WO2006076220A3 publication Critical patent/WO2006076220A3/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • 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
    • 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 shape memory phenomenon in iron- based shape memory alloys is enhanced to a degree greater than possible in, or contemplated by, earlier work by surface carburizing articles made from the alloy, while in austenitic form, so as to achieve an increased surface concentration of interstitial carbon.
  • the article is subjected to low temperature carburization so that carburization is accomplished without substantial formation of carbide precipitates.
  • Carburization of steels and other ferrous-based alloys has traditionally been done for improving the surface hardness of the alloy.
  • This process which is known in industry as "case hardening," is normally done at 1700° F (950° C) or above.
  • carbon atoms rapidly diffuse into the article's surfaces.
  • this diffused carbon forms carbide precipitates, which are specific chemical compounds such as iron carbide, chromium carbide and the like suspended in a matrix of the surrounding metal.
  • Carbide precipitates are very hard, and so the resultant carburized surface or "case” is also very hard.
  • the amount by which the concentration of interstitial carbon atoms in the article's carburized surfaces should be increased relative to its body can vary widely, and essentially any amount will be effective. Normally, however, the amount interstitial carbon concentration in the article's surfaces should be sufficient to create a noticeable improvement on the shape memory effect exhibited by the article. This can be easily determined by subjecting two otherwise identical sample articles, one with a carburized surface in accordance with the invention and the other without, to the same shape memory cycle of deformation and reverse transformation and measuring the force generated by the two articles during the reverse transformation portion of the cycle. Where this "return" force is greater in the carburized article, the amount of carburization has been sufficient to generate a "noticeable improvement" in the shape memory effect.
  • interstitial carbon concentrations of at least about 2 atomic %, more typically at least about 4 atomic % and even a least about 6 atomic % as measured by ESCA and X-ray diffraction are readily obtainable in accordance with the present invention.
  • shaped article is intended to exclude the bulk products delivered from the mill but to include any products made therefrom, i.e., any product of commerce which is obtained by imparting a useful shape to a bulk alloy by any type of metal shaping operation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Chemically Coating (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

L'effet de mémoire de forme d'un article fabriqué à partir d'un alliage à mémoire de forme à base ferreuse est renforcé par la carburation des surfaces de l'article.
PCT/US2006/000428 2005-01-10 2006-01-06 Carburation d'alliages a memoire de forme a base ferreuse WO2006076220A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64293205P 2005-01-10 2005-01-10
US60/642,932 2005-01-10

Publications (2)

Publication Number Publication Date
WO2006076220A2 true WO2006076220A2 (fr) 2006-07-20
WO2006076220A3 WO2006076220A3 (fr) 2006-09-08

Family

ID=36192133

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/000428 WO2006076220A2 (fr) 2005-01-10 2006-01-06 Carburation d'alliages a memoire de forme a base ferreuse

Country Status (2)

Country Link
US (1) US20060151069A1 (fr)
WO (1) WO2006076220A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008013765A1 (fr) * 2006-07-24 2008-01-31 Swagelok Company Article métallique à interstices nombreux

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7407196B2 (en) 2003-08-06 2008-08-05 Swagelok Company Tube fitting with separable tube gripping device
US7497483B2 (en) 2004-04-22 2009-03-03 Swagelok Company Fitting for tube and pipe with cartridge
TW200602577A (en) 2004-04-22 2006-01-16 Swagelok Co Fitting for tube and pipe
US20060237962A1 (en) * 2005-04-22 2006-10-26 Anderson Bret M Tool for preparing fitting and conduit connection
WO2007002576A2 (fr) * 2005-06-27 2007-01-04 Swagelok Company Raccord de tube
WO2008030375A2 (fr) 2006-09-01 2008-03-13 Swagelok Company Raccord pour conduits de fluide
WO2009003015A1 (fr) * 2007-06-26 2008-12-31 Swagelok Company Appareil et procede de raccord a absence de jeu presentant une fonction de detection facultative
JP6413327B2 (ja) * 2014-05-09 2018-10-31 いすゞ自動車株式会社 浸炭処理された部品の評価方法

Citations (2)

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Publication number Priority date Publication date Assignee Title
US4933027A (en) * 1988-04-05 1990-06-12 Nkk Corporation Iron-based shape-memory alloy excellent in shape-memory property, corrosion resistance and high-temperature oxidation resistance
EP0506488A1 (fr) * 1991-03-29 1992-09-30 Mitsubishi Jukogyo Kabushiki Kaisha Alliages à mémoire de forme, du type fer-chrome-nickel-silicium et présentant une excellente résistance à la corrosion fissurante sous contraintes

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DE3573932D1 (en) * 1984-09-07 1989-11-30 Nippon Steel Corp Shape memory alloy and method for producing the same
US4929289A (en) * 1988-04-05 1990-05-29 Nkk Corporation Iron-based shape-memory alloy excellent in shape-memory property and corrosion resistance
US5216503A (en) * 1991-12-24 1993-06-01 General Instrument Corporation Statistical multiplexer for a multichannel image compression system
US5199497A (en) * 1992-02-14 1993-04-06 Baker Hughes Incorporated Shape-memory actuator for use in subterranean wells
CA2126467A1 (fr) * 1993-07-13 1995-01-14 Barin Geoffry Haskell Codage et decodage variables pour systeme video haute definition progressif
US5629736A (en) * 1994-11-01 1997-05-13 Lucent Technologies Inc. Coded domain picture composition for multimedia communications systems
US5792282A (en) * 1995-04-17 1998-08-11 Daido Hoxan, Inc. Method of carburizing austenitic stainless steel and austenitic stainless steel products obtained thereby
US5966120A (en) * 1995-11-21 1999-10-12 Imedia Corporation Method and apparatus for combining and distributing data with pre-formatted real-time video
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Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933027A (en) * 1988-04-05 1990-06-12 Nkk Corporation Iron-based shape-memory alloy excellent in shape-memory property, corrosion resistance and high-temperature oxidation resistance
EP0506488A1 (fr) * 1991-03-29 1992-09-30 Mitsubishi Jukogyo Kabushiki Kaisha Alliages à mémoire de forme, du type fer-chrome-nickel-silicium et présentant une excellente résistance à la corrosion fissurante sous contraintes

Non-Patent Citations (3)

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Title
K. TSUZAKI ET AL.: "Improvement of the Shape Memory Effect in Fe-Mn-Si Alloys by the addition of carbon" SCRIPTA METALLURIGICA ET MATERIALIA, vol. 27, 1992, pages 471-473, XP002379502 USA *
MAKI T ET AL: "SHAPE MEMORY EFFECT IN FERROUS ALLOYS" PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON MARTENSITIC TRANSFORMATIONS, XX, XX, 26 August 1986 (1986-08-26), pages 963-970, XP009065680 cited in the application *
PINQIANG DAI: "Effcet of solution hardening on the shape memory properties of Fe-Mn-Si based alloys" JOURNAL OF MATERIALS SCIENCE LETTERS, vol. 19, 2000, pages 111-113, XP002379503 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008013765A1 (fr) * 2006-07-24 2008-01-31 Swagelok Company Article métallique à interstices nombreux

Also Published As

Publication number Publication date
US20060151069A1 (en) 2006-07-13
WO2006076220A3 (fr) 2006-09-08

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