EP0040767A2 - Use of nickel-cobalt sintered materials for electrical relay contacts - Google Patents

Use of nickel-cobalt sintered materials for electrical relay contacts Download PDF

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Publication number
EP0040767A2
EP0040767A2 EP81103722A EP81103722A EP0040767A2 EP 0040767 A2 EP0040767 A2 EP 0040767A2 EP 81103722 A EP81103722 A EP 81103722A EP 81103722 A EP81103722 A EP 81103722A EP 0040767 A2 EP0040767 A2 EP 0040767A2
Authority
EP
European Patent Office
Prior art keywords
nickel
cobalt
sintered
contact
relay contacts
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
EP81103722A
Other languages
German (de)
French (fr)
Other versions
EP0040767A3 (en
EP0040767B1 (en
Inventor
Horst Prof. Dr. Schreiner
Reinhard Tusche
Sjouke Dipl.-Ing. Zijlstra
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0040767A2 publication Critical patent/EP0040767A2/en
Publication of EP0040767A3 publication Critical patent/EP0040767A3/en
Application granted granted Critical
Publication of EP0040767B1 publication Critical patent/EP0040767B1/en
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to the use of a sintered material, which consists of 50 to 85% nickel and 50 to 15% cobalt, as a material for electrical relay contacts.
  • a small material migration is required for relay contact materials, since the switching function can be disturbed by the formation of mountains and valleys and the relays fail as a result.
  • Another requirement is a small contact resistance.
  • silver-containing contact materials sulfide layers cause an unfavorable increase in the contact resistance values.
  • palladium alloys were used, which form significantly fewer sulfide layers on the contact surface and thus have a cheaper, lower contact resistance.
  • the invention has for its object to find a low-precious metal sintered material as a contact material for electrical relay contacts based on nickel-cobalt, which shows a high hardness and practically no increase in contact resistance under current loads and practically no material migration.
  • This object is achieved according to the invention by using a sintered material which consists of 50 to 85% nickel and 50 to 15% cobalt.
  • nickel-cobalt sintered materials are compositions 85% nickel and 15% cobalt, 75% nickel and 25% cobalt, 65% nickel and 35% cobalt and 50% nickel and 50% cobalt.
  • the sintered material NiCo25 is particularly suitable as a replacement for the previously used, expensive contact material PdCu15 in flasher relays of motor vehicles (hazard warning lights, direction indicators) as a movable contact piece. It shows up to 8 with a switching number. 10 5 very little material migration and sufficiently low contact resistance. Tests under flashing lamp loads did not show any failures due to hooking, welding or increasing the contact resistance.

Abstract

Es hat sich gezeigt. daß sich Nickel-Kobalt-Sinterlegierungen der Zusammensetzung 50 bis 85% Nickel und 50 bis 15% Kobalt als Werkstoff für elektrische Relais-Kontakte eignen. Es war überraschend, daß sich derartige NiCo-Sinterlegierungen, wie z.B. NiCo25 (Massen-Prozent), beim Schalten von Gleichströmen in Relais, wie dies z.B. in Blinkrelais von Kraftfahrzeugen der Fall ist, keine Materialwanderung in störendem Maße auftritt. In dieser Eigenschaft liegen diese Sinterkontaktwerkstoffe sehr ähnlich den hochpalladiumhaltigen Legierungen. Ein weiterhin überraschender Effekt trat bei Messung der Kontaktwiderstandswerte auf. Prüfungen unter Blinklampenlast ergaben keine Ausfälle durch Verhaken, Verschweißen oder Kontaktwiderstandserhöhung. Ein weiterer Vorteil dieses Kontaktmaterials besteht darin, daß es verhältnismäßig edelmetallarm ist.It has shown. that nickel-cobalt sintered alloys of the composition 50 to 85% nickel and 50 to 15% cobalt are suitable as a material for electrical relay contacts. It was surprising that such NiCo sintered alloys, e.g. NiCo25 (mass percent), when switching direct currents in relays, e.g. is the case in flashing relays of motor vehicles, no material migration occurs to a disruptive extent. In this property, these sintered contact materials are very similar to the alloys containing high palladium. Another surprising effect occurred when measuring the contact resistance values. Tests under flashing lamp loads did not show any failures due to hooking, welding or increasing contact resistance. Another advantage of this contact material is that it is relatively low in precious metals.

Description

Die Erfindung bezieht sich auf die Verwendung eines Sinterwerkstoffes, der aus 50 bis 85 % Nickel und 50 bis 15 % Kobalt besteht, als Werkstoff für elektrische Relais-Kontakte.The invention relates to the use of a sintered material, which consists of 50 to 85% nickel and 50 to 15% cobalt, as a material for electrical relay contacts.

Für Relais-Kontaktwerkstoffe wird eine kleine Materialwanderung gefordert, da durch Berg- und Talbildung die Schaltfunktion gestört werden kann und die Relais dadurch ausfallen. Eine weitere Forderung ist ein kleiner Kontaktwiderstand. Bei silberhaltigen Kontaktwerkstoffen bewirken Sulfidschichten eine ungünstige Erhöhung der Kontaktwiderstandswerte. Deshalb wurden Palladium-Legierungen eingesetzt, die an der Kontaktoberfläche wesentlich weniger Sulfidschichten bilden und damit einen günstigeren, niedrigeren Kontaktwiderstand aufweisen. Es handelt sich hierbei jedoch um edelmetallreiche Kontaktmaterialien.A small material migration is required for relay contact materials, since the switching function can be disturbed by the formation of mountains and valleys and the relays fail as a result. Another requirement is a small contact resistance. With silver-containing contact materials, sulfide layers cause an unfavorable increase in the contact resistance values. For this reason, palladium alloys were used, which form significantly fewer sulfide layers on the contact surface and thus have a cheaper, lower contact resistance. However, these are contact materials rich in precious metals.

Der Erfindung liegt die Aufgabe zugrunde, einen edelmetallarmen Sinterwerkstoff als Kontaktwerkstoff für elektrische Relais-Kontakte auf der Basis Nickel-Kobalt zu finden, der eine hohe Härte und bei Strombelastungen praktisch keine Zunahme des Kontaktwiderstandes und praktisch keine Materialwanderung zeigt.The invention has for its object to find a low-precious metal sintered material as a contact material for electrical relay contacts based on nickel-cobalt, which shows a high hardness and practically no increase in contact resistance under current loads and practically no material migration.

Diese Aufgabe wird gemäß der Erfindung gelöst durch die Verwendung eines Sinterwerkstoffes, der aus 50 bis 85 % Nickel und 50 bis 15 % Kobalt besteht.This object is achieved according to the invention by using a sintered material which consists of 50 to 85% nickel and 50 to 15% cobalt.

Beispiele für besonders vorteilhafte Nickel-Kobalt-Sinterwerkstoffe sind Zusammensetzungen 85 % Nickel und 15 % Kobalt, 75 % Nickel und 25 % Kobalt, 65 % Nickel und 35 % Kobalt und 50 % Nickel und 50 % Kobalt.Examples of particularly advantageous nickel-cobalt sintered materials are compositions 85% nickel and 15% cobalt, 75% nickel and 25% cobalt, 65% nickel and 35% cobalt and 50% nickel and 50% cobalt.

Insbesondere der Sinterwerkstoff NiCo25 eignet sich als Ersatz für den bisher verwendeten, teuren Kontaktwerkstoff PdCu15 in Blinkrelais von Kraftfahrzeugen (Warnblinken, Richtungsblinken) als bewegliches Kontaktstück. Er zeigt bei einer Schaltzahl bis zu 8 . 105 nur äußerst geringe Materialwanderung und ausreichend niedrigen Kontaktwiderstand. Prüfungen unter Blinklampenlast ergaben keine Ausfälle durch Verhaken, Verschweißen oder Kontaktwiderstandserhöhung.The sintered material NiCo25 is particularly suitable as a replacement for the previously used, expensive contact material PdCu15 in flasher relays of motor vehicles (hazard warning lights, direction indicators) as a movable contact piece. It shows up to 8 with a switching number. 10 5 very little material migration and sufficiently low contact resistance. Tests under flashing lamp loads did not show any failures due to hooking, welding or increasing the contact resistance.

Nach Lagerung in aggressiver Atmosphäre, z.B. in Salzsäuredämpfen und nach Salzsprühtests ergaben sich ebenfalls keine Beeinträchtigungen der Schaltfunktion.After storage in an aggressive atmosphere, e.g. in hydrochloric acid vapors and after salt spray tests there was also no impairment of the switching function.

Die Herstellung derartiger Sinterwerkstoffe kann vorteilhaft nach den an sich bekannten'pulvermetallurgi- schen Verfahren durchgeführt werden.The production of such sintered materials can advantageously be carried out according to the powder metallurgical methods known per se.

Claims (5)

1. Verwendung eines Sinterwerkstoffes, der aus 50 bis 85 % Nickel und 50 bis 15 % Kobalt besteht, als Werkstoff für elektrische Relais-Kontakte.1. Use of a sintered material, which consists of 50 to 85% nickel and 50 to 15% cobalt, as a material for electrical relay contacts. 2. Verwendung eines Sinterwerkstoffes nach Anspruch 1 für den dort angegebenen Zweck, der aus 85 % Nickel und 15 % Kobalt besteht.2. Use of a sintered material according to claim 1 for the purpose specified there, which consists of 85% nickel and 15% cobalt. 3. Verwendung eines Sinterwerkstoffes nach Anspruch 1 für den dort angegebenen Zweck, der aus 75 % Nickel und 25 % Kobalt besteht.3. Use of a sintered material according to claim 1 for the purpose specified there, which consists of 75% nickel and 25% cobalt. 4. Verwendung eines Sinterwerkstoffes nach Anspruch 1 für den dort angegebenen Zweck, der aus 65 % Nickel und 35 % Kobalt besteht.4. Use of a sintered material according to claim 1 for the purpose specified therein, which consists of 65% nickel and 35% cobalt. 5. Verwendung eines Sinterwerkstoffes nach Anspruch 1 für den dort angegebenen Zweck, der aus 50 % Nickel und 50 % Kobalt besteht.5. Use of a sintered material according to claim 1 for the purpose specified therein, which consists of 50% nickel and 50% cobalt.
EP81103722A 1980-05-28 1981-05-14 Use of nickel-cobalt sintered materials for electrical relay contacts Expired EP0040767B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3020277 1980-05-28
DE19803020277 DE3020277A1 (en) 1980-05-28 1980-05-28 USE OF NICKEL-COBALT SINTER MATERIALS FOR ELECTRICAL RELAY CONTACTS

Publications (3)

Publication Number Publication Date
EP0040767A2 true EP0040767A2 (en) 1981-12-02
EP0040767A3 EP0040767A3 (en) 1982-06-23
EP0040767B1 EP0040767B1 (en) 1984-10-24

Family

ID=6103437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103722A Expired EP0040767B1 (en) 1980-05-28 1981-05-14 Use of nickel-cobalt sintered materials for electrical relay contacts

Country Status (6)

Country Link
US (1) US4334929A (en)
EP (1) EP0040767B1 (en)
JP (1) JPS5719349A (en)
BR (1) BR8103299A (en)
DE (2) DE3020277A1 (en)
PT (1) PT73073B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205290A (en) 1991-04-05 1993-04-27 Unger Evan C Low density microspheres and their use as contrast agents for computed tomography
JPH0510686A (en) * 1991-07-03 1993-01-19 Nkk Corp Preheating method for material to be charged in electric furnace and upper bin for preheating material
DE102018109262B4 (en) * 2018-04-18 2021-05-12 Seg Automotive Germany Gmbh Method for producing a component in a circuit in a starter relay for a starting device for an internal combustion engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD115800A1 (en) * 1974-11-01 1975-10-12

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA892488A (en) * 1968-11-15 1972-02-08 W. Kushnir Bud Two-phase cobalt-iron alloys prepared by powder metallurgy
JPS5719845B2 (en) * 1972-10-03 1982-04-24
JPS5823453B2 (en) * 1978-02-27 1983-05-16 ソニー株式会社 Alloy for magnetoelectric transducer and its manufacturing method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD115800A1 (en) * 1974-11-01 1975-10-12

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 80, Nr. 16, 22. April 1974, Columbus, Ohio, (USA) I.M. FEDORCHENKO et al.: "Relations governing two-component sintering.", Seite 214, Spalte 2, Abstract Nr. 86374m; & Phys. Sintering Band 5, Nr. 2/2, 1973, Seiten 345 bis 358 *

Also Published As

Publication number Publication date
JPS5719349A (en) 1982-02-01
BR8103299A (en) 1982-02-16
PT73073A (en) 1981-06-01
DE3020277A1 (en) 1981-12-03
EP0040767A3 (en) 1982-06-23
EP0040767B1 (en) 1984-10-24
DE3166795D1 (en) 1984-11-29
PT73073B (en) 1982-06-03
US4334929A (en) 1982-06-15

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