[go: up one dir, main page]

WO2008003275A1 - Procédés de fabrication de pièces moulées en alliages métalliques durcis par phase dispersée - Google Patents

Procédés de fabrication de pièces moulées en alliages métalliques durcis par phase dispersée Download PDF

Info

Publication number
WO2008003275A1
WO2008003275A1 PCT/DE2007/000949 DE2007000949W WO2008003275A1 WO 2008003275 A1 WO2008003275 A1 WO 2008003275A1 DE 2007000949 W DE2007000949 W DE 2007000949W WO 2008003275 A1 WO2008003275 A1 WO 2008003275A1
Authority
WO
WIPO (PCT)
Prior art keywords
powder
extrusion
molded parts
deformation
alloys
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.)
Ceased
Application number
PCT/DE2007/000949
Other languages
German (de)
English (en)
Inventor
Markus Hofmockel
Mark Hartmann
Claudia Stadelmann
Markus BÖHM
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.)
ECKA GRANULATE VELDEN GmbH
Original Assignee
ECKA GRANULATE VELDEN 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 ECKA GRANULATE VELDEN GmbH filed Critical ECKA GRANULATE VELDEN GmbH
Publication of WO2008003275A1 publication Critical patent/WO2008003275A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/222—Non-consumable electrodes
    • 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
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • B22F3/204—Continuous compaction with axial pressure and without reduction of section
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • C22C32/0021—Matrix based on noble metals, Cu or alloys thereof

Definitions

  • the invention relates to processes for the production of moldings from dispersion-strengthened metal alloys; moldings produced therefrom and their use.
  • Dispersion-strengthened metal alloys have a wide field of application: u.a. Silver, copper, iron, nickel and aluminum etc. or their alloys.
  • the temperature resistance of Ni-base alloys for use in turbine blades is further improved by dispersion hardening.
  • Dispersion strengthened copper extends the range of application of copper. Its properties make it an important construction material for electrical and electronic products / applications, such as resistance welding electrodes, holders for filaments or switch and sliding contacts. The high thermal conductivity and good creep resistance allow the use of dispersion strengthened copper in structural applications in nuclear reactor construction.
  • Oxide dispersion strengthened copper ODS, oxides dispersion strengthened
  • ODS oxides dispersion strengthened
  • the production of an ODS copper material is also known from US Pat. No. 3,779,714 A1. Electrodes made of ODS copper alloys are disclosed in DE 24 18 686 A1 described.
  • the dispersion strengthened copper is a powder metallurgical material that can not be compacted by pressing and sintering.
  • the former powder grains form elongated grains according to the extrusion ratio (fibrous structure) (see Fig. 3). This inevitably creates a aligned in the direction of the rod axis texture. This is due to the relatively brittle material, kerban certification and reacts brittle to loads across the fiber orientation. Healing of this grain structure by recrystallization is prevented by the dispersoids.
  • ODS-copper oxide dispersion strengthened
  • Typical such rods of ODS copper are described in US 5030275. Further improvements can be achieved if the fibrous microstructure of ODS copper can be replaced with a more suitable microstructure.
  • the fibrous structure of conventionally extruded ODS copper combined with the very fine-grained microstructure results in that at the working surface of an electrode cap (front tip of the electrode) very many grain boundaries come out. This offers many points of attack for the in-diffusion of zinc alloyed on the electrode tip.
  • the resistance spot welding of galvanized sheets leads to the zinc alloying at the tip of the electrode. By diffusion of zinc atoms from the electrode tip inward along the grain boundaries, the undesirable effect of so-called “mushrooming" is promoted and enhanced.
  • electrode caps for resistance spot welding using classical P / M (press-sintering-calibrate) technology which would avoid such a fiber structure, are likely to be eliminated since in sintered copper the sintering activity is severely inhibited.
  • the metal is selected from the group consisting of Ni, Cu, Al, Ag, Fe.
  • the metal is an ODS copper alloy
  • Particularly suitable as continuous powder extrusion is a friction wheel method.
  • the low degree of powder extrusion is a continuous powder extrusion which enables the production of molded articles (rods) in a rapid and cost effective manner.
  • the molded parts (rods) made from continuously powder-extruded metal powder of high compressive strength produced according to the invention have a grain structure which is curved in the longitudinal direction, since a low degree of deformation was set during powder extrusion ("NUG structure"). This avoids exposing many grain boundaries when cutting perpendicular to the rod axis, and the resulting surface is less reactive and more diffusive than that of high-strain rods that exhibit a parallel-fiber structure.
  • the molded article is made of an alloy selected from the group consisting of: Cu, Al, Ag, Ni 1 Fe alloys and DS-reinforced alloys.
  • Suitable alloys are, for example:
  • a preferred molded part consists of continuous powder-extruded ODS copper powder of high compressive strength with a longitudinally arcuate in the molding grain structure, wherein the powder extrusion an extrusion ratio of 1, 5: 1 to about 4: 1 was used with low degree of deformation.
  • These Cu-shaped parts are particularly suitable for the production of electrodes, in particular welding electrodes and especially as an electrode cap for resistance spot welding. A typical use of such electrodes is the resistance spot welding of sheets, in particular galvanized sheets.
  • molded parts made of continuously powder-extruded ODS copper powder have an arcuate grain structure in the pressing direction (see Fig. 1 and Fig. 2) wherein the powder extrusion an extrusion ratio of 1, 5: 1 to about 4: 1 was used with low degree of deformation.
  • the material made of ODS copper powder with this special grain structure is particularly suitable for the production of electrodes, in particular as electrode caps for resistance spot welding.
  • electrodes in particular as electrode caps for resistance spot welding.
  • a common application of these electrode caps is the resistance spot welding of sheets, in particular galvanized sheets.
  • Cu electrode caps for resistance spot welding are produced economically in large numbers by continuous powder extrusion with subsequent cold extrusion.
  • fibrous texture of conventionally extruded material (Fig. 3) thereby reduces the tendency for cracking (along the grain boundaries) during the extrusion process.
  • the compressive strength, especially in the core is significantly higher than that of samples of conventionally extruded DS-copper, as was surprisingly found in the investigation of samples of DS-copper with an arcuate grain structure. This increases the life of components made therefrom, e.g. Electrode caps for resistance spot welding. The higher resistance to deformation also counteracts the mentioned "mushrooming".
  • the arcuate fiber profile has a more favorable orientation of the microstructure compared to the cutting angles of inserted milling tools, as with conventionally extruded material, which u.a. leads to the formation of a smooth surface during cap milling.
  • FIG. 1 shows a cross section through a rod made of ODS copper from a continuous extrusion process according to the invention with a low degree of deformation on a scale of 500:
  • Fig. 2 is a fracture surface of the rod of Fig. 1;
  • Fig. 1 the microstructure of a rod of an ODS copper alloy is shown in which a copper powder of an average particle size of 300 .mu.m was pressed in a continuously operating extruder with friction wheel without external heating with an extrusion ratio of 2: 1. You can clearly see the arcuate fiber profile in the direction of the rod axis.
  • Fig. 2 is a photograph of a fracture surface of the rod of Fig. 1 is shown. Significantly, the arcuate fiber profile in the central region of the rod can be seen, which leads to a very little frayed / cracked fracture surface.
  • Fig. 3 shows a longitudinal section through a conventionally extruded rod made of an ODS-Cu alloy, from which can be read in the direction of the rod axis extending fiber profile.
  • Rods having this fibrous structure tend to brittle fracture upon bending and are susceptible to cracking when subjected to stress across the fiber texture (e.g., cold extrusion of male electrode caps with female tapered seat).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Powder Metallurgy (AREA)

Abstract

L'invention concerne des procédés de fabrication de pièces moulées (tiges) en alliages métalliques durcis par phase dispersée, qui comprennent une extrusion de poudre en continu de la poudre d'alliage métallique avec un faible degré de déformation lors de la fabrication de pièces moulées avec une structure granulaire cintrée dans le sens longitudinal, ainsi que l'utilisation des pièces moulées pour la fabrication d'électrodes et/ou de capuchons d'électrodes.
PCT/DE2007/000949 2006-07-06 2007-05-25 Procédés de fabrication de pièces moulées en alliages métalliques durcis par phase dispersée Ceased WO2008003275A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006031366.6 2006-07-06
DE102006031366A DE102006031366C5 (de) 2006-07-06 2006-07-06 Verfahren zur Herstellung von Formteilen aus dispersionsverfestigten Metalllegierungen

Publications (1)

Publication Number Publication Date
WO2008003275A1 true WO2008003275A1 (fr) 2008-01-10

Family

ID=38268437

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2007/000949 Ceased WO2008003275A1 (fr) 2006-07-06 2007-05-25 Procédés de fabrication de pièces moulées en alliages métalliques durcis par phase dispersée

Country Status (2)

Country Link
DE (1) DE102006031366C5 (fr)
WO (1) WO2008003275A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010057836A1 (fr) * 2008-11-24 2010-05-27 Diaccon Gmbh Dispositif et procédé pour revêtir un substrat par dépôt chimique en phase vapeur
WO2010057837A1 (fr) * 2008-11-24 2010-05-27 Diaccon Gmbh Dispositif et procédé de revêtement d’un substrat au moyen de cvd
DE102017100911A1 (de) 2017-01-18 2018-07-19 Neue Materialien Fürth GmbH Kontinuierliches Strangpressverfahren für ein metallhaltigesSchüttgut und Metallpulverstrangpressanlage
EP3308995B1 (fr) 2016-10-17 2021-05-12 SNCF Mobilités Bande d'usure de pantographe et pantographe equipe d'une telle bande d'usure

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010008839U1 (de) 2010-10-19 2011-03-17 Ecka Granulate Gmbh & Co. Kg Elektrode für das Rollennahtschweißen
CN113702178B (zh) * 2021-08-06 2024-02-09 京仪股份有限公司 一种弥散强化铝镁合金丝抗撕裂性能检测装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045644A (en) * 1975-07-24 1977-08-30 Scm Corporation Welding electrode and method of making
EP0087911A1 (fr) * 1982-02-22 1983-09-07 The Nippert Company Méthode pour la fabrication d'une électrode de soudage pat résistance
DE3627022A1 (de) * 1986-08-09 1988-02-18 Licentia Gmbh Verfahren zum herstellen einer elektrode zum widerstandsschweissen
US5030275A (en) * 1987-12-14 1991-07-09 Scm Metal Products, Inc. Equiaxed dispersion strengthened copper product
FR2771038A1 (fr) * 1997-11-14 1999-05-21 Lorraine Laminage Procede de fabrication d'une electrode de soudage par resistance par points et electrode de soudage obtenue
US6047471A (en) * 1997-11-20 2000-04-11 The Nippert Company Method of making a resistance welding electrode
US20040238501A1 (en) * 2003-05-27 2004-12-02 Masataka Kawazoe Electrode material and method for manufacture thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779714A (en) * 1972-01-13 1973-12-18 Scm Corp Dispersion strengthening of metals by internal oxidation
US3814635A (en) * 1973-01-17 1974-06-04 Int Nickel Co Production of powder alloy products
DE2418686C2 (de) * 1974-04-18 1982-06-09 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zur Herstellung von Halbzeug aus dispersionsgehärteten Kupferlegierungen
CA1284896C (fr) * 1984-10-23 1991-06-18 Paul S. Gilman Methode de production d'alliages d'aluminium durci par phase dispersee
DE19752805C2 (de) * 1997-11-28 2000-06-08 Dorn Gmbh C Dispersionsverfestigter Kupferwerkstoff
DE10135485A1 (de) * 2001-07-20 2003-02-06 Schwaebische Huettenwerke Gmbh Verfahren zur endkonturnahen Fertigung von Bauteilen bzw. Halbzeugen aus schwer zerspanbaren Leichtmetalllegierungen, und Bauteil bzw. Halbzeug, hergestellt durch das Verfahren

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045644A (en) * 1975-07-24 1977-08-30 Scm Corporation Welding electrode and method of making
EP0087911A1 (fr) * 1982-02-22 1983-09-07 The Nippert Company Méthode pour la fabrication d'une électrode de soudage pat résistance
DE3627022A1 (de) * 1986-08-09 1988-02-18 Licentia Gmbh Verfahren zum herstellen einer elektrode zum widerstandsschweissen
US5030275A (en) * 1987-12-14 1991-07-09 Scm Metal Products, Inc. Equiaxed dispersion strengthened copper product
FR2771038A1 (fr) * 1997-11-14 1999-05-21 Lorraine Laminage Procede de fabrication d'une electrode de soudage par resistance par points et electrode de soudage obtenue
US6047471A (en) * 1997-11-20 2000-04-11 The Nippert Company Method of making a resistance welding electrode
US20040238501A1 (en) * 2003-05-27 2004-12-02 Masataka Kawazoe Electrode material and method for manufacture thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010057836A1 (fr) * 2008-11-24 2010-05-27 Diaccon Gmbh Dispositif et procédé pour revêtir un substrat par dépôt chimique en phase vapeur
WO2010057837A1 (fr) * 2008-11-24 2010-05-27 Diaccon Gmbh Dispositif et procédé de revêtement d’un substrat au moyen de cvd
US20110287194A1 (en) * 2008-11-24 2011-11-24 Cemecon Ag Device and method for coating a substrate using cvd
US9127350B2 (en) 2008-11-24 2015-09-08 Diaccon Gmbh Device and method for coating a substrate using CVD
US9343337B2 (en) 2008-11-24 2016-05-17 Diaccon Gmbh Device and method for coating a substrate using CVD
EP3308995B1 (fr) 2016-10-17 2021-05-12 SNCF Mobilités Bande d'usure de pantographe et pantographe equipe d'une telle bande d'usure
DE102017100911A1 (de) 2017-01-18 2018-07-19 Neue Materialien Fürth GmbH Kontinuierliches Strangpressverfahren für ein metallhaltigesSchüttgut und Metallpulverstrangpressanlage
WO2018134018A1 (fr) 2017-01-18 2018-07-26 Neue Materialien Fürth GmbH Procédé d'extrusion continue pour un produit en vrac contenant des métaux, et installation d'extrusion d'une poudre métallique

Also Published As

Publication number Publication date
DE102006031366B3 (de) 2007-08-02
DE102006031366C5 (de) 2010-01-28

Similar Documents

Publication Publication Date Title
DE102015121862B4 (de) Zündkerze
WO2007112936A2 (fr) Composite constitué de phases intermétalliques et de métal
DE2227523A1 (de) Aluminium-nickellegierter elektrischer leiterwerkstoff und verfahren zu seiner herstellung
WO2008003275A1 (fr) Procédés de fabrication de pièces moulées en alliages métalliques durcis par phase dispersée
EP2353209B1 (fr) Procédé pour produire un produit semi-fini pour contacts électriques
DE1283547B (de) Verfahren zum Erhoehen der Zugfestigkeit, Dehngrenze und Zeitstandfestigkeit und zurStabilisierung der Kornorientierung von dispersionsgehaerteten Legierungen
DE102008056263A1 (de) Verfahren zur Herstellung eines Halbzeugs und Halbzeug für elektrische Kontakte sowie Kontaktstück
DE4111683C2 (fr)
EP1370381B1 (fr) Corps fritte de haute porosite et son procede de fabrication
EP2747917A1 (fr) Procédé de production d'un demi-produit pour des contacts électriques, et pièce de contact
DE10352453A1 (de) Verfahren zur Herstellung von Metall-Matrix-Verbundwerkstoffen
DE3604861A1 (de) Verfahren zur pulvermetallurgischen herstellung von feindispersen legierungen
DE3601707A1 (de) Verfahren zur herstellung von koerpern hoher dichte und hoher zugfestigkeit
EP1043409B1 (fr) Matériau composite préparé par métallurgie des poudres
DE2747089C2 (fr)
DE2055757B2 (de) Elektrodenhalter fuer lichtbogenoefen
WO2013179135A1 (fr) Composant de contact et procédé de fabrication dudit composant
DE1920466A1 (de) Verfahren zum Verfestigen von Werkstuecken
EP1046724B1 (fr) Matériau composite à matrice métallique contenant des fibres et son procédé de préparation
EP0693564B1 (fr) Procédé de préparation de corps composés de phases intermétallique à partir de composants pulvérulents ductiles
DE1483356A1 (de) Verfahren zum Herstellen einer Wolfram-Rhenium-Legierung
DE2840369A1 (de) Elektrode fuer das elektrische widerstandsschweissen
DE1533230B1 (de) Metall-Graphit-Verbundwerkstoff
EP4454785A1 (fr) Matériau de fabrication additive de pièces à base d'extrusion
DE2726480A1 (de) Elektrisches kontaktmaterial

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07722467

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 07722467

Country of ref document: EP

Kind code of ref document: A1