EP0045985A1 - Procédé de fabrication d'un alliage à mémoire à base de cuivre - Google Patents

Procédé de fabrication d'un alliage à mémoire à base de cuivre Download PDF

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Publication number
EP0045985A1
EP0045985A1 EP81200691A EP81200691A EP0045985A1 EP 0045985 A1 EP0045985 A1 EP 0045985A1 EP 81200691 A EP81200691 A EP 81200691A EP 81200691 A EP81200691 A EP 81200691A EP 0045985 A1 EP0045985 A1 EP 0045985A1
Authority
EP
European Patent Office
Prior art keywords
copper
powder
hot
alloy
starting material
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.)
Granted
Application number
EP81200691A
Other languages
German (de)
English (en)
Other versions
EP0045985B1 (fr
Inventor
Gernot Dr. Gessinger
Olivier Dr. Mercier
Helmut Dr. Riegger
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0045985A1 publication Critical patent/EP0045985A1/fr
Application granted granted Critical
Publication of EP0045985B1 publication Critical patent/EP0045985B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0425—Copper-based alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/006—Resulting in heat recoverable alloys with a memory effect

Definitions

  • the invention relates to a method for producing a copper-based memory alloy according to the preamble of claim 1.
  • the invention is based on the object of specifying a production method for copper-based memory alloys which combines high reproducibility with the greatest possible simplicity and economy, is suitable for mass production and enables homogeneous, dense products in the form of semi-finished or finished products.
  • the coarse powder (grain size> 0.05 by plasma spheroidization, rotating electrode method, dropletization of a melt by means of ultrasonic excitation, atomization of a melt at high speed or by any other known method.
  • the blank was subjected to hot forming by open die forging at a temperature of approx. 800 ° C.
  • the diameter of the workpiece was essentially reduced so that a rod of 18 mm in diameter was finally available.
  • the process is in no way limited to this variant.
  • the starting powder can also consist of powders of different compositions, which together form the final alloy.
  • the grain diameter (particle size) of the powder can in principle be between 0.05 and 0.8 mm.
  • the pressure used in isostatic pressing can be 50 to 300 MPa, depending on the conditions and size of the workpiece to be produced, the associated pressing temperature, depending on the alloy, 750 to 950 ° C and the time period Y2 h to 5 h.
  • the hot-forming operation which can consist of forges, presses, rotary hammers, rollers, etc., is advantageously carried out in the temperature range between 750 and 850 ° C.
  • a hollow cylinder made of copper or a ductile copper alloy can also be used to encapsulate the powder.
  • the powder encapsulated in the rubber tube was subjected to a cold isostatic pressing process:
  • the cold-pressed blank was encapsulated in a copper cylinder of the following dimensions after removal from the rubber hose:
  • the copper cylinder was covered with a lid and sealed and welded under vacuum.
  • the capsule sealed in this way was then subjected to a hot isostatic pressing process with the following characteristics:
  • the blank was subjected to a heat treatment, which corresponded to a homogenization anneal under the following conditions:
  • Example 1 After homogenization, the workpiece was subjected to a forging operation similar to Example 1.
  • the method is not exhausted in this embodiment variant. Any mixture of master alloys and / or elementary powder in any number (two or more types of powder) can be used as the starting powder. The only requirement is that the desired final composition is achieved by mixing the powder.
  • a suitable plastic hose for cold isostatic pressing which is advantageously carried out at pressures of 300 to 800 MPa for 1 to 10 minutes, can also be used.
  • the Homogenization annealing can be carried out in the temperature range of 900 to 950 ° C for 1 to 20 h.
  • Alloys of the following composition are particularly suitable as alloys for this process:
  • the powder metallurgical process according to the invention and the semi-finished and finished products produced thereafter enable the production of workpieces from a memory alloy of the Cu / Al or Cu / Al / Ni type, which have better homogeneity compared to bodies produced by melt metallurgy or by conventional powder metallurgy methods, and allow economical production.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
EP81200691A 1980-08-07 1981-06-19 Procédé de fabrication d'un alliage à mémoire à base de cuivre Expired EP0045985B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5986/80 1980-08-07
CH598680 1980-08-07

Publications (2)

Publication Number Publication Date
EP0045985A1 true EP0045985A1 (fr) 1982-02-17
EP0045985B1 EP0045985B1 (fr) 1984-02-08

Family

ID=4302525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200691A Expired EP0045985B1 (fr) 1980-08-07 1981-06-19 Procédé de fabrication d'un alliage à mémoire à base de cuivre

Country Status (3)

Country Link
US (1) US4410488A (fr)
EP (1) EP0045985B1 (fr)
DE (1) DE3162167D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181745A (en) * 1985-08-28 1987-04-29 Avesta Nyby Powder Ab Hot-deformed powder metallurgy articles
CH664515A5 (en) * 1984-12-20 1988-03-15 Bbc Brown Boveri & Cie Powder metallurgical prodn. of shape memory article - of beta brass type copper alloy contg. metal oxide dispersoid
WO2009043323A1 (fr) * 2007-10-04 2009-04-09 Forschungszentrum Jülich GmbH PROCÉDÉ DE FABRICATION DE SEMI-PRODUITS À PARTIR D'ALLIAGES NiTi À MÉMOIRE DE FORME

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602952A (en) * 1985-04-23 1986-07-29 Cameron Iron Works, Inc. Process for making a composite powder metallurgical billet
US6089781A (en) * 1998-08-12 2000-07-18 Hughes Electronics Corporation Structure utilizing a shape-memory alloy fastener
US6526648B1 (en) 2001-07-27 2003-03-04 Raytheon Company Positioning of an optical device using a non-force-applying external agent
US20130280120A1 (en) * 2010-04-23 2013-10-24 United States Department Of Energy Hard and Super-hard Metal Alloys and Methods for Making the Same
CN103028729B (zh) * 2011-09-29 2015-05-13 河南省大地合金股份有限公司 生产直径小于0.6mm的硬质合金超细棒材的方法
CN114807652B (zh) * 2021-12-24 2022-10-04 昆明冶金研究院有限公司北京分公司 一种艺术用粉末冶金复合材料的制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2055755A1 (de) * 1969-11-12 1971-05-19 Fulmer Res Inst Ltd Verfahren zur Herstellung von Gegen standen aus Kupferlegierungen, die in der Lage sind, ihre Gestalt zu andern
DE2200670A1 (de) * 1971-04-30 1972-11-16 Crucible Inc Verfahren zum Herstellen metallkeramischer Gegenstaende
US4094053A (en) * 1976-05-21 1978-06-13 Wyman-Gordon Company Forging process
GB2011479A (en) * 1977-12-28 1979-07-11 Leuven Res & Dev Vzw Process of manufacturing solid bodies of copper zincaluminium alloys
EP0035601A1 (fr) * 1980-03-03 1981-09-16 BBC Aktiengesellschaft Brown, Boveri & Cie. Procédé de fabrication d'un alliage-mémoire

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700434A (en) * 1969-04-21 1972-10-24 Stanley Abkowitz Titanium-nickel alloy manufacturing methods
US3775101A (en) * 1970-04-20 1973-11-27 Nasa Method of forming articles of manufacture from superalloy powders
US4140528A (en) * 1977-04-04 1979-02-20 Crucible Inc. Nickel-base superalloy compacted articles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2055755A1 (de) * 1969-11-12 1971-05-19 Fulmer Res Inst Ltd Verfahren zur Herstellung von Gegen standen aus Kupferlegierungen, die in der Lage sind, ihre Gestalt zu andern
DE2200670A1 (de) * 1971-04-30 1972-11-16 Crucible Inc Verfahren zum Herstellen metallkeramischer Gegenstaende
FR2134345A1 (fr) * 1971-04-30 1972-12-08 Crucible Inc
US4094053A (en) * 1976-05-21 1978-06-13 Wyman-Gordon Company Forging process
GB2011479A (en) * 1977-12-28 1979-07-11 Leuven Res & Dev Vzw Process of manufacturing solid bodies of copper zincaluminium alloys
DE2856082A1 (de) * 1977-12-28 1979-07-12 Leuven Res & Dev Vzw Verfahren zum herstellen von festen koerpern aus kupfer-zink-aluminium-legierungen
EP0035601A1 (fr) * 1980-03-03 1981-09-16 BBC Aktiengesellschaft Brown, Boveri & Cie. Procédé de fabrication d'un alliage-mémoire

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664515A5 (en) * 1984-12-20 1988-03-15 Bbc Brown Boveri & Cie Powder metallurgical prodn. of shape memory article - of beta brass type copper alloy contg. metal oxide dispersoid
GB2181745A (en) * 1985-08-28 1987-04-29 Avesta Nyby Powder Ab Hot-deformed powder metallurgy articles
GB2181745B (en) * 1985-08-28 1990-03-21 Avesta Nyby Powder Ab A process for the production of powder-metallurgy articles
WO2009043323A1 (fr) * 2007-10-04 2009-04-09 Forschungszentrum Jülich GmbH PROCÉDÉ DE FABRICATION DE SEMI-PRODUITS À PARTIR D'ALLIAGES NiTi À MÉMOIRE DE FORME
US8916091B2 (en) 2007-10-04 2014-12-23 Forschungszentrum Juelich Gmbh Method for producing semi-finished products from NiTi shape memory alloys

Also Published As

Publication number Publication date
EP0045985B1 (fr) 1984-02-08
DE3162167D1 (en) 1984-03-15
US4410488A (en) 1983-10-18

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