EP0414709A1 - Sintered contact material based on silver for use in power engineering switchgear, in particular for contact pieces in low-voltage switches. - Google Patents

Sintered contact material based on silver for use in power engineering switchgear, in particular for contact pieces in low-voltage switches.

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Publication number
EP0414709A1
EP0414709A1 EP89904519A EP89904519A EP0414709A1 EP 0414709 A1 EP0414709 A1 EP 0414709A1 EP 89904519 A EP89904519 A EP 89904519A EP 89904519 A EP89904519 A EP 89904519A EP 0414709 A1 EP0414709 A1 EP 0414709A1
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EP
European Patent Office
Prior art keywords
contact material
silver
material according
sintered contact
titanium
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
EP89904519A
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German (de)
French (fr)
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EP0414709B1 (en
Inventor
Wolfgang Haufe
Joachim Dipl-Phys Grosse
Bernhard Rothkegel
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Siemens AG
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Siemens AG
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Priority to AT89904519T priority Critical patent/ATE91727T1/en
Publication of EP0414709A1 publication Critical patent/EP0414709A1/en
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Publication of EP0414709B1 publication Critical patent/EP0414709B1/en
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Classifications

    • 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
    • C22C32/0047—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 carbides, nitrides, borides or silicides as the main non-metallic constituents
    • 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
    • C22C1/0466—Alloys based on noble metals
    • 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
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/059—Making alloys comprising less than 5% by weight of dispersed reinforcing phases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/023—Composite material having a noble metal as the basic material

Definitions

  • Silver-based sintered contact material for use in switchgear in power engineering, especially for contact pieces in low-voltage switches
  • the invention relates to a sintered contact material based on silver for use in switching devices in power engineering, in particular for contact pieces in low-voltage switches, which contains at least one higher-melting metal, a metal alloy and / or a metal compound as active component in addition to silver.
  • switching devices in energy technology are to be understood exclusively as air switching devices.
  • contact materials of the silver-metal system have proven themselves for a long time.
  • the silver-nickel (AgNi) system had a significant share of these contact materials.
  • the advantageous properties of silver-nickel in contact systems are known and together with the test methods for contact materials, for example in Int. J. Powder Metallurgy and Powder Technology, Vol. 12 (1976), P 219-228.
  • the object of the invention is therefore to provide a contact material of the type mentioned, in which nickel as an active component by a metal, a metal alloy or a Metal connection is replaced without the contact properties are impaired.
  • the contact material contains at least iron (Fe) and / or titanium (Ti) as the active component in addition to silver (Ag).
  • the active components can be present in the material in mass proportions of up to 50%.
  • iron or titanium it is possible for iron or titanium to be present alone in combination with silver.
  • the iron and titanium are in an alloyed form.
  • Iron and titanium form an intermetallic phase in which the properties optimally complement one another, particularly in the composition close to 50 atom% (46% by weight Ti).
  • the contact material can additionally contain nitrides and / or carbides and / or borides of metals as further active components. Titanium in particular, but also zirconium or tantalum are suitable for this.
  • the nitrides and / or carbides and / or borides of the metal can have a mass fraction of 1 to 50% based on the iron-titanium content as the main active component.
  • the proportion of base components can be increased by the nitrides, carbides and / or borides, i.e. reduce the necessary amount of silver. Overall, the material can contain the base components in mass fractions up to a maximum of 50%.
  • the table shows measured values for the maximum welding force in N, for the volume burn-off in mm 3 and for the contact resistance in m. specified.
  • these measured values each characterize the property spectrum of the contact material, in particular the volume erosion is a significant measure of the possible number of switching operations of the contact, ie the service life of the contact piece and the contact resistance is a significant measure of the excess temperature at the contact piece.
  • the measured values are compared with the measured values for AgNi10.
  • a powder mixture is first produced from commercially available silver powder and iron or titanium powder or FeTi alloy powder and the powders of the other components by wet mixing.
  • the maximum particle size of the powder is approximately 25 ⁇ m.
  • the powder mixture becomes molded parts at a pressure of 200 MPa
  • Pressed contact pieces For a secure connection technique of the contact piece to the contact piece carrier by brazing, it can be advantageous in this pressing process to press a second layer of pure silver together with the contact layer to form a two-layer contact piece.
  • the molded parts are sintered at a temperature of about 850 ° C. for about an hour in a vacuum or under protective gas.
  • the sintered bodies are subsequently pressed at a pressure of 1000 MPa and sintered again at 650 ° C. for about an hour in a vacuum or under a protective gas.
  • the contact piece thus produced is again calibrated at a pressure of 1000 MPa.
  • contact pieces can be produced by first processing the contact material into strips or wires by extrusion. Contact pieces with a directional structure can then be separated from this semi-finished product.
  • iron-titanium alloy powders were used in series of tests. Optimal properties are available with a FeTi46 alloy, in which iron and titanium form the intermetallic phase FeTi. In particular, the titanium counteracts the tendency of iron to corrode, which could otherwise have a disruptive effect on the iron over a longer service life of the contact piece.
  • composition of the active component was predominantly chosen in such a way that a volume fraction corresponding to the nickel int material AgNi10 is achieved.
  • titanium nitrides and / or titanium carbides are added to the FeTi46 alloy. Their mass fractions are measured so that they are between 1 and 50% based on the iron-titanium content. Overall, in the examples, care is taken that the material contains a maximum of 50% base components in mass fractions.
  • the welding force of the volume burnup and the contact resistance were determined in a known manner in a test switch under constant test conditions at an inrush current of 1000 A and an off current of 1000 A using a switching number of 500.
  • the results are summarized in the table and are compared with the measured values of a conventional AgNi10 material.
  • the table shows that the maximum welding force in all examples is not significantly above that of the known AgNi10 reference material.
  • the volume burn-off, on the other hand, is consistently below that of the reference material.
  • the contact resistance is of the same order of magnitude, in some cases also with higher Wexts. Overall, however, the contact property spectrum formed by the combination of the individual values shows values comparable with AgNi10.
  • the specified contact materials can therefore replace the AgNi materials, so that the carcinogenic nickel can now be completely dispensed with.
  • borides can also be used as additional active components.
  • zirconium or tantalum boride can be expected to have good properties, it being possible in each case to combine borides with carbides and / or nitrides.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Dispersion Chemistry (AREA)
  • Contacts (AREA)
  • Powder Metallurgy (AREA)

Abstract

Des matériaux de contact contiennent, outre l'argent, au moins un métal, un alliage métallique ou un composé métallique qui présente un point de fusion supérieur à celui de l'argent. Selon l'invention, un matériau de ce type contient, outre l'argent (Ag), entre 2 et 50% en masse d'au moins du fer (Fe) et/ou du titane (Ti). Le cas échéant, le matériau peut également comprendre des nitrures, des carbures et/ou des borures des métaux titane, zirconium et/ou tantale. Il s'est révélé que ces matériaux présentent des propriétés de contact généralement correspondant à celles de AgNi10 et qu'ils peuvent donc entièrement remplacer ce dernier.Contact materials contain, in addition to silver, at least one metal, a metal alloy or a metal compound which has a higher melting point than silver. According to the invention, a material of this type contains, in addition to silver (Ag), between 2 and 50% by mass of at least iron (Fe) and / or titanium (Ti). Where appropriate, the material may also comprise nitrides, carbides and / or borides of the titanium, zirconium and / or tantalum metals. It has been found that these materials have contact properties generally corresponding to those of AgNi10 and that they can therefore entirely replace the latter.

Description

Sinterkontaktwerkstoff auf Silberbasis zur Verwendung in Schaltgeräten der Energietechnik, insbesondere für Kontaktstücke in Niederspannungsschaltern Silver-based sintered contact material for use in switchgear in power engineering, especially for contact pieces in low-voltage switches
Die Erfindung bezieht sich auf einen Sinterkontaktwerkstoff auf Silberbasis zur Verwendung in Schaltgeräten der Energietechnik, insbesondere für Kontaktstücke in Niederspannungsschaltern, der neben Silber wenigstens ein höherschmelzendes Metall, eine Metallegierung und/oder eine Metallverbindung als Wirkkomponente enthält. Unter Schaltgeräten der Energietechnik sind in vorliegendem Fall ausschließlich Luftschaltgeräte zu verstehen.The invention relates to a sintered contact material based on silver for use in switching devices in power engineering, in particular for contact pieces in low-voltage switches, which contains at least one higher-melting metal, a metal alloy and / or a metal compound as active component in addition to silver. In the present case, switching devices in energy technology are to be understood exclusively as air switching devices.
Für Kontaktstücke in Niederspannungsschaltgeräten der Energietechnik, z.B. in Leistungsschaltern sowie in Gleichstrom- und Hilfsschützen, haben sich Kontaktwerkstoffe des Systems Silber-Metall (AgMe) seit langem bewährt. Einen wesentlichen Anteil an diesen Kontaktwerkstoffen hat in der Vergangenheit das System Silber-Nickel (AgNi) gehabt. Die vorteilhaften Eigenschaften von Silber-Nickel in Kontaktsystemen sind bekannt und zusammen mit den Prüfmethoden für Kontaktwerkstoffe beispielsweise in Int. J . Powder Metallurgy and Powder Technology, Vol. 12 (1976), P 219 - 228 beschrieben.For contact pieces in low-voltage switching devices in energy technology, e.g. In circuit breakers as well as in direct current and auxiliary contactors, contact materials of the silver-metal system (AgMe) have proven themselves for a long time. In the past, the silver-nickel (AgNi) system had a significant share of these contact materials. The advantageous properties of silver-nickel in contact systems are known and together with the test methods for contact materials, for example in Int. J. Powder Metallurgy and Powder Technology, Vol. 12 (1976), P 219-228.
Es wurde aber vor einiger Zeit erkannt, daß Nickelstaub karzinogene Wirkungen hat. Deshalb sind seit einiger Zeit Bestrebungen im Gange, das Nickel durch ein anderes Metall oder eine Metallegierung bzw. eine Metallverbindung zu ersetzen. Diese neuen Werkstoffe müssen jedoch ein ähnliches Kontakteigenschaftsspektrum wie AgNi-Werkstoffe aufweisen.However, it was recognized some time ago that nickel dust has carcinogenic effects. For this reason, efforts have been underway for some time to replace the nickel with another metal or a metal alloy or a metal compound. However, these new materials must have a similar range of contact properties as AgNi materials.
Aufgabe der Erfindung ist es daher, einen Kontaktwerkstoff der eingangs genannten Art anzugeben, bei dem Nickel als Wirkkomponente durch ein Metall, eine Metallegierung oder eine Metallverbindung ersetzt ist, ohne daß die Kontakteigenschaften verschlechtert werden.The object of the invention is therefore to provide a contact material of the type mentioned, in which nickel as an active component by a metal, a metal alloy or a Metal connection is replaced without the contact properties are impaired.
Die Aufgabe ist erfindungsgemäß dadurch gelöst, daß der Kontaktwerkstoff neben Silber (Ag) als Wirkkomponente wenigstens Eisen (Fe) und/oder Titan (Ti) enthält. Die Wirkkomponänte kann im Werkstoff in Massenanteilen bis zu 50 % vorhanden sein.The object is achieved in that the contact material contains at least iron (Fe) and / or titanium (Ti) as the active component in addition to silver (Ag). The active components can be present in the material in mass proportions of up to 50%.
Im Rahmen der Erfindung ist es möglich, daß Eisen oder Titan jeweils allein in Kombination mit Silber vorhanden ist. Vorzugsweises liegen aber das Eisen und das Titan in legierter Form vor. Insbesondere in der Zusammensetzung nahe 50 Atom-% (46 Gew.-% Ti) bilden Eisen und Titan eine intermetallische Phase, in der sich die Eigenschaften optimal ergänzen.In the context of the invention it is possible for iron or titanium to be present alone in combination with silver. Preferably, however, the iron and titanium are in an alloyed form. Iron and titanium form an intermetallic phase in which the properties optimally complement one another, particularly in the composition close to 50 atom% (46% by weight Ti).
In Weiterbildung der Erfindung kann der Kontaktwerkstoff zusätzlich als weitere Wirkkomponenten Nitride und/oder Carbide und/oder Boride von Metallen enthalten. Dafür kommt insbesondere Titan, aber auch Zirkon oder Tantal in Frage. Die Nitride und/oder Carbide und/oder Boride des Metalles können einen Massenanteil von 1 bis 50 % bezogen auf den Eisen-Titangehalt als Hauptwirkkomponente haben. Durch die Nitride, Carbide und/oder Boride läßt sich der Anteil der unedlen Bestandteile vergrößern, d.h. den notwendigen Silberanteil verringern. Insgesamt kann der Werkstoff die unedlen Bestandteile in Massenanteilen bis maximal 50 % enthalten.In a further development of the invention, the contact material can additionally contain nitrides and / or carbides and / or borides of metals as further active components. Titanium in particular, but also zirconium or tantalum are suitable for this. The nitrides and / or carbides and / or borides of the metal can have a mass fraction of 1 to 50% based on the iron-titanium content as the main active component. The proportion of base components can be increased by the nitrides, carbides and / or borides, i.e. reduce the necessary amount of silver. Overall, the material can contain the base components in mass fractions up to a maximum of 50%.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles zur Herstellung von Kontaktstücken, wobei weiterhin auf die beigefügte Tabelle mit Einzelbeispielen für unterschiedliche Werkstoffzusammensetzungen gemäß der Erfindung hingewiesen wird. In der Tabelle sind Meßwerte für die maximale Schweißkraft in N, für den Volumenabbrand in mm3 und für den Kontaktwiderstand in m. angegeben. Diese Meßwerte kennzeichnen in Kombination jeweils das Eigenschaftsspektrum des Kontaktwerkstoffes, wobei insbesondere der Volumenabbrand ein signifikantes Maß für die mögliche Schaltzahl des Kontaktes, d.h. der Lebensdauer des Kontaktstückes und der Kontaktwiderstand ein signifikantes Maß für die Übertemperatur am Kontaktstück ist. Die Meßwerte werden jeweils mit den Meßwerten für AgNi10 verglichen.Further details and advantages of the invention emerge from the following description of an exemplary embodiment for the production of contact pieces, reference being further made to the attached table with individual examples for different material compositions according to the invention. The table shows measured values for the maximum welding force in N, for the volume burn-off in mm 3 and for the contact resistance in m. specified. In combination, these measured values each characterize the property spectrum of the contact material, in particular the volume erosion is a significant measure of the possible number of switching operations of the contact, ie the service life of the contact piece and the contact resistance is a significant measure of the excess temperature at the contact piece. The measured values are compared with the measured values for AgNi10.
Zur Herstellung des Kontaktwerkstoffes wird zunächst aus handelsüblichem Silber-Pulver und Eisen- bzw. Titan-Pulver oder FeTi-Legierungspulver sowie den Pulvern der weiteren Komponenten durch Naßmischen eine Pulvermischung hergestellt. Die maximale Teilchengröße der Pulver beträgt etw a 25 μm . Aus de r Pulvermischung werden Formteile bei einem Druck von 200 MPa zuTo produce the contact material, a powder mixture is first produced from commercially available silver powder and iron or titanium powder or FeTi alloy powder and the powders of the other components by wet mixing. The maximum particle size of the powder is approximately 25 μm. The powder mixture becomes molded parts at a pressure of 200 MPa
Kontaktstücken gepreßt. Für eine sichere Verbindungstechnik des Kontaktstückes mit dem Kontaktstückträger durch Hartlöten kann es vorteilhaft sein, bei diesem Preßvorgang eine zweite Schicht aus Reinsilber gemeinsam mit der Kontaktschicht zu einem Zweischichtenkontaktstück zu verpressen.Pressed contact pieces. For a secure connection technique of the contact piece to the contact piece carrier by brazing, it can be advantageous in this pressing process to press a second layer of pure silver together with the contact layer to form a two-layer contact piece.
Es erfolgt eine Sinterung der Formteile bei einer Temperatur von etwa 850°C etwa eine Stunde im Vakuum oder unter Schutzgas. Zur Erzielung einer möglichst geringen Porosität werden anschließend die Sinterkörper bei einem Druck von 1000 MPa nachgepreßt und nochmals bei 650ºC etwa eine Stunde im Vakuum oder unter Schutzgas gesintert. Das Kalibrieren des so hergestellten Kontaktstückes erfolgt wiederum bei einem Druck von 1000 MPa.The molded parts are sintered at a temperature of about 850 ° C. for about an hour in a vacuum or under protective gas. To achieve the lowest possible porosity, the sintered bodies are subsequently pressed at a pressure of 1000 MPa and sintered again at 650 ° C. for about an hour in a vacuum or under a protective gas. The contact piece thus produced is again calibrated at a pressure of 1000 MPa.
Alternativ zur Formteiltechnik können Ko ntaktstücke dadurch hergestellt werden, daß zunächst der Kontaktwerkstoff durch Strangpressen zu Bändern oder Drähten verarbeitet wird. Von diesem Halbzeug lassen sich dann Kontaktstücke mit Richtgefüge abtrennen. In Versuchsreihen wurde außer mit reinem Fe-Pulver bzw. Ti-Pulver insbesondere mit Eisen-Titan-Legierungspulvern gearbeitet. Optimale Eigenschaften liegen bei einer FeTi46-Legierung vor, bei der Eisen und Titan die intermetallische Phase FeTi bilden. Dabei wirkt insbesondere das Titan der Korrosionsneigung von Eisen entgegen, die sich ansonsten über eine längere Lebensdauer des Kontaktstückes am Eisen störend bemerkbar machen könnte.As an alternative to the molding technology, contact pieces can be produced by first processing the contact material into strips or wires by extrusion. Contact pieces with a directional structure can then be separated from this semi-finished product. In series of tests, in addition to pure Fe powder or Ti powder, in particular iron-titanium alloy powders were used. Optimal properties are available with a FeTi46 alloy, in which iron and titanium form the intermetallic phase FeTi. In particular, the titanium counteracts the tendency of iron to corrode, which could otherwise have a disruptive effect on the iron over a longer service life of the contact piece.
Bei. den Beispielen wurde die Zusammensetzung der Wirkkomponente überwiegend: so: gewählt, daß in etwa ein Volumenanteil entsprechend dem Nickel int Werkstoff AgNi10 erreicht wird.At. In the examples, the composition of the active component was predominantly chosen in such a way that a volume fraction corresponding to the nickel int material AgNi10 is achieved.
In weiteren Einzelbeispielen werden zur FeTi46-Legierung Titannitride und/oder Titankarbide hinzugefügt. Deren Massenanteile werden so bemessen, daß sie bezogen auf den Eisen-Titan-Gehalt zwischen 1 bis 50 % liegen. Insgesamt wird bei den Beispielen darauf geachtet, daß der Werkstoff maximal in Massenanteilen 50 % unedle Bestandteile enthält.In further individual examples, titanium nitrides and / or titanium carbides are added to the FeTi46 alloy. Their mass fractions are measured so that they are between 1 and 50% based on the iron-titanium content. Overall, in the examples, care is taken that the material contains a maximum of 50% base components in mass fractions.
Von den nach obiger Vorschrift hergestellten Kontaktstücken aus den angegebenen Werkstoffen wurden in einem Prüfschalter unter konstanten Prüfbedingungen bei einem Einschaltstrom von 1000 A und einem Ausschaltstrom von 1000 A in bekannter Weise über eine Schaltzahl von 500 die Schweißkraft der Volumenabbrand und der Kontaktwiderstand ermittelt. Die Ergebnisse sind in der Tabelle zusammengestellt und werden mit den Meßwerten eines herkömmlichen AgNi10-Werkstoffes verglichen.Of the contact pieces made according to the above regulations made of the specified materials, the welding force of the volume burnup and the contact resistance were determined in a known manner in a test switch under constant test conditions at an inrush current of 1000 A and an off current of 1000 A using a switching number of 500. The results are summarized in the table and are compared with the measured values of a conventional AgNi10 material.
Die Tabelle zeigt, daß die maximale Schweißkraft bei allen Beispielen nicht wesentlich über dem beim bekannten AgNi10-Vergleichswerkstoff liegt. Der Volumenabbrand liegt dagegen durchweg unter dem des Vergleichswerkstoffes. Der Kontaktwiderstand liegt jeweils in der gleichen Größenordnung, teilweise auch bei höheren Wexten. Insgesamt zeigt aber das durch die Kombination der Einzelwerte gebildete Kontakteigenschaftsspektrum jeweils mit AgNi10 vergleichbare Werte. Die angegebenen Kontaktwerkstoffe können daher die AgNi-Werkstoffe ersetzen, so daß nunmehr auf das karzinogene Nickel vollständig verzichtet werden kann.The table shows that the maximum welding force in all examples is not significantly above that of the known AgNi10 reference material. The volume burn-off, on the other hand, is consistently below that of the reference material. The contact resistance is of the same order of magnitude, in some cases also with higher Wexts. Overall, however, the contact property spectrum formed by the combination of the individual values shows values comparable with AgNi10. The specified contact materials can therefore replace the AgNi materials, so that the carcinogenic nickel can now be completely dispensed with.
In weiteren Beispielen können neben den oben angegebenen Metallverbindungen als zusätzliche Wirkkomponenten auch Boride verwendet werden. Insbesondere Zirkon- oder Tantalborid lassen gute Eigenschaften erwarten, wobei jeweils Boride mit Karbiden und/oder Nitriden kombiniert werden können. In further examples, in addition to the metal compounds specified above, borides can also be used as additional active components. In particular, zirconium or tantalum boride can be expected to have good properties, it being possible in each case to combine borides with carbides and / or nitrides.
Tabelletable
Bsp. Nr. Zusammensetzung Max. Schweißkraft Volumenabbrand Kontaktwiderstand Fsmax in N ΔV500 in mm3 RK1 in mExample No. Composition Max. Welding force Volume burnup Contact resistance Fs max in N ΔV 500 in mm 3 R K1 in m
VergleichsAgNi10 550 45 0,03 werkstoffComparative AgNi10 550 45 0.03 material
1 AgFe9 723 12 0,03 2 AgFe20 403 7 0,05 3 AgFe30 160 2 0,091 AgFe9 723 12 0.03 2 AgFe20 403 7 0.05 3 AgFe30 160 2 0.09
4 Ag(FeTi20)7,9 297 21 0,05 5 Ag(FeTi30)7,5 332 19 0,05 6 Ag(FeTi46)6,7 363 21 0,03 7 Ag(FeTi40)6,4 456 38 0,04 8 Ag(TiFe30)7 626 33 0,05 9 AgTi5,3 846 23 0,054 Ag (FeTi20) 7.9 297 21 0.05 5 Ag (FeTi30) 7.5 332 19 0.05 6 Ag (FeTi46) 6.7 363 21 0.03 7 Ag (FeTi40) 6.4 456 38 0 , 04 8 Ag (TiFe30) 7 626 33 0.05 9 AgTi5.3 846 23 0.05
10 Ag(FeTi20)15 179 18 0,08 11 Ag(FeTi46)5,6TiN1 250 17 0,04 12 Ag(FeTi46)6TiC0,5ZrB2O,25 382 21 0,06 13 Ag(FeTi46)5,5TaC0,5 351 27 0,0410 Ag (FeTi20) 15 179 18 0.08 11 Ag (FeTi46) 5.6TiN1 250 17 0.04 12 Ag (FeTi46) 6TiC0.5ZrB 2 O, 25 382 21 0.06 13 Ag (FeTi46) 5.5TaC0, 5 351 27 0.04
130 01 01 130 01 01

Claims

Patentansprüche Claims
1. Sinterkontaktwerkstoff auf Silberbasis zur Verwendung in Schaltgeräten der Energietechnik, insbesondere für Kontaktstücke in Niederspannungsschaltern, der neben Silber als Wirkkomponente wenigstens ein höher schmelzendes Metall, Metalllegierung oder Metallverbindung enthält, d a d u r c h g e k e n n z e i c h n e t , daß er neben Silber (Ag) als Wirkkomponente wenigstens Eisen (Fe) und/oder Titan (Ti) enthält.1. Sintered contact material based on silver for use in switching devices in energy technology, in particular for contact pieces in low-voltage switches, which contains at least one higher melting metal, metal alloy or metal compound in addition to silver as the active component, characterized in that it contains at least iron (Fe) as the active component in addition to silver (Ag) and / or contains titanium (Ti).
2. Sinterkontaktwerkstoff nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Anteil der Wirkkomponente in Massenanteilen zwischen 2 und 50 % liegt.2. Sintered contact material according to claim 1, so that the proportion of the active component in proportions by mass is between 2 and 50%.
3. Sinterkontaktwerkstoff nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , daß der Anteil der Wirkkomponente kleiner als 40 % ist.3. sintered contact material according to claim 2, d a d u r c h g e k e n n z e i c h n e t that the proportion of the active component is less than 40%.
4. Sinterkontaktwerkstoff nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t , daß der Anteil der Wirkkomponente kleiner als 30 % ist.4. Sintered contact material according to claim 3, that the proportion of the active component is less than 30%.
5. Sinterkontaktwerkstoff nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß der Anteil der Wirkkomponente kleiner als 20 % ist.5. sintered contact material according to claim 4, d a d u r c h g e k e n n z e i c h n e t that the proportion of the active component is less than 20%.
6. Sinterkontaktwerkstoff nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß Eisen (Fe) und Titan (Ti) in legierter Form vorliegen.6. sintered contact material according to claim 1, d a d u r c h g e k e n n z e i c h n e t that iron (Fe) and titanium (Ti) are in alloyed form.
7. Sinterkontaktwerkstoff nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , daß Eisen (Fe) und Titan (Ti) in Massenanteilen von etwa 54 zu 46 % vorliegen und die intermetallische Verbindung FeTi bilden. 7. sintered contact material according to claim 2, characterized in that iron (Fe) and titanium (Ti) are present in mass fractions of about 54 to 46% and form the intermetallic compound FeTi.
8. Sinterkontaktwerkstoff nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß als weitere Wirkkomponenten Nitride und/oder Karbide und/ oder Boride von Metallen vorhanden sind.8. Sintered contact material according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that nitrides and / or carbides and / or borides of metals are present as further active components.
9. Sinterkontaktwerkstoff nach Anspruch 8, d a d u r c h g e k e n n z e i c h n e t , daß der Anteil der Nitride und/ oder Karbide und/oder Boride in Massenanteilen 1 bis 50 % bezogen auf den Anteil von Eisen und/oder Titan ist.9. sintered contact material according to claim 8, d a d u r c h g e k e n n z e i c h n e t that the proportion of nitrides and / or carbides and / or borides in mass fractions is 1 to 50% based on the proportion of iron and / or titanium.
10 . Sinterkontaktwerkstoff nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß das Metall zur Bildung der Nitride, Karbide und/oder Boride Titan ist.10th Sintered contact material according to claim 4, so that the metal used to form the nitrides, carbides and / or borides is titanium.
11. Sinterkontaktwerkstoff nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß das Metall zur Bildung der Nitride, Karbide und/oder Boride Zirkon ist.11. Sintered contact material according to claim 4, that the metal for forming the nitrides, carbides and / or borides is zirconium.
12. Sinterkontaktwerkstoff nach Anspruch 4, d a d u r c h g e k e n n z ei c h n e t , daß das Metall zur Bildung der Nitride, Karbide und/oder Boride Tantal ist.12. Sintered contact material according to claim 4, d a d u r c h g e k e n n z ei c h n e t that the metal to form the nitrides, carbides and / or borides is tantalum.
; ;
EP89904519A 1988-04-20 1989-04-19 Sintered contact material based on silver for use in power engineering switchgear, in particular for contact pieces in low-voltage switches Expired - Lifetime EP0414709B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89904519T ATE91727T1 (en) 1988-04-20 1989-04-19 SILVER-BASED SINTERED CONTACT MATERIAL FOR USE IN POWER TECHNOLOGY SWITCHGEAR, ESPECIALLY FOR CONTACT PIECES IN LOW VOLTAGE SWITCHES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3813311 1988-04-20
DE3813311 1988-04-20

Publications (2)

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EP0414709A1 true EP0414709A1 (en) 1991-03-06
EP0414709B1 EP0414709B1 (en) 1993-07-21

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EP89904519A Expired - Lifetime EP0414709B1 (en) 1988-04-20 1989-04-19 Sintered contact material based on silver for use in power engineering switchgear, in particular for contact pieces in low-voltage switches

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US (1) US5246480A (en)
EP (1) EP0414709B1 (en)
DE (1) DE58904983D1 (en)
DK (1) DK246590D0 (en)
IN (1) IN171942B (en)
WO (1) WO1989010417A1 (en)

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DE4117311A1 (en) * 1991-05-27 1992-12-03 Siemens Ag CONTACT MATERIAL ON A SILVER BASE FOR USE IN SWITCHGEAR DEVICES IN ENERGY TECHNOLOGY
DE4205763A1 (en) * 1992-02-25 1993-08-26 Siemens Ag SILVER-BASED SINTER CONTACT MATERIAL FOR USE IN SWITCHGEAR OF ENERGY TECHNOLOGY
US5744254A (en) * 1995-05-24 1998-04-28 Virginia Tech Intellectual Properties, Inc. Composite materials including metallic matrix composite reinforcements
US5679471A (en) * 1995-10-16 1997-10-21 General Motors Corporation Silver-nickel nano-composite coating for terminals of separable electrical connectors
JPH09111419A (en) * 1995-10-16 1997-04-28 Alps Electric Co Ltd Magneto-resistance effect material and magnetro-resistance effect multilayer film
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DE19543222C1 (en) * 1995-11-20 1997-02-20 Degussa Silver@-iron material contg. oxide additives
DE19543208C1 (en) * 1995-11-20 1997-02-20 Degussa Silver@-iron@ material contg. oxide additives
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Also Published As

Publication number Publication date
DK246590A (en) 1990-10-12
DK246590D0 (en) 1990-10-12
IN171942B (en) 1993-02-13
US5246480A (en) 1993-09-21
EP0414709B1 (en) 1993-07-21
DE58904983D1 (en) 1993-08-26
WO1989010417A1 (en) 1989-11-02

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