EP0171339A1 - Verfahren zur Herstellung von elektrischen Kontakten - Google Patents

Verfahren zur Herstellung von elektrischen Kontakten Download PDF

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Publication number
EP0171339A1
EP0171339A1 EP85420134A EP85420134A EP0171339A1 EP 0171339 A1 EP0171339 A1 EP 0171339A1 EP 85420134 A EP85420134 A EP 85420134A EP 85420134 A EP85420134 A EP 85420134A EP 0171339 A1 EP0171339 A1 EP 0171339A1
Authority
EP
European Patent Office
Prior art keywords
metal
carbon
alloy
alloys
electrical contact
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
EP85420134A
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English (en)
French (fr)
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EP0171339B1 (de
Inventor
Paul Reille
Dominique Berger
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.)
Mersen SA
Original Assignee
Carbone Lorraine SA
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Filing date
Publication date
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Application filed by Carbone Lorraine SA filed Critical Carbone Lorraine SA
Priority to AT85420134T priority Critical patent/ATE38738T1/de
Publication of EP0171339A1 publication Critical patent/EP0171339A1/de
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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
    • H01H1/027—Composite material containing carbon particles or fibres

Definitions

  • the present invention relates to a method for manufacturing electrical contacts made of metal or metal alloy and carbon fibers, and to the contacts obtained.
  • This process has the major drawback of being difficult to implement.
  • the duration of the soaking must be well defined so as not to transform all the carbon into carbide, and one cannot obtain contacts consisting solely of the chosen metal and of carbon wires.
  • the carbon wires are aligned in a preferential direction, that is to say in general perpendicular to the contact surface, so as to reduce the wear by the arc which forms during switching operations.
  • Another disadvantage is that it requires an expensive and bulky device for compression.
  • One of the aims of the invention is to overcome the drawbacks which the methods described present.
  • This process also makes it possible to use, at the start, carbon fibers of relatively great length of the order of 30 to 50 mm.
  • the metal or metal alloy is chosen from those which are good conductors of electricity and which do not react with carbon at the melting temperature of the metal.
  • metal or alloy can be dictated by reasons of economy and / or abundance of the metal.
  • copper and its alloys can be used which, for good contact performance, have the advantage of being more economical and more abundant than silver.
  • the carbon fiber substrate can consist of loose fibers or preferably a felt.
  • carbon fibers are also understood to mean graphite fibers.
  • the percentage of carbon in the final product is obtained by varying the density of the fiber substrate. This density can vary from 0.05 to 1, the rate of metal or alloy therefore varies from 97.5% to 45% by volume.
  • 80 g of carbonized viscose fibers with a diameter of 10 ⁇ m and a length of 50 mm are compacted in the form of a felt with a diameter of 80 mm and a thickness of 80 mm.
  • This felt is impregnated with molten copper, at 1100 ° C under a pressure of 5 bars.
  • the billet obtained contains 87% by volume of copper and its examination that the carbon fibers have retained their length (around 50 mm) and their random orientation after impregnation.
  • This billet is then hot-spun at 850 ° C through a circular section of 12 mm diameter.
  • the bar is finally cut perpendicular to the axis of the spinning in discs of thickness 1 mm.
  • the discs obtained were used as covering contacts. It has been found that their performance relative to their cost price is such that they can advantageously replace the silver-cadmium oxide contacts despite a shorter lifespan,
  • the fiber substrate used is the same as in Example 1.
  • the felt is impregnated with the molten Cu-Cr-Zr alloy at 1050 ° C. under a pressure of 5 bars.
  • the billet obtained contains 84.5% by volume of Cu-Cr-Zr alloy.
  • This billet is then hot-spun at 820 ° through a die of square section 12 X 12 mm.
  • the bar obtained consists of a rectangular section 12 X 12 mm and 2.8 m long, which is cut into slices 1 mm thick which are used as opening contacts.
  • Example 2 All the observations indicated in Example 1 are applicable to Example 2.
  • This example is a variant of Example 2.
  • the Cu-Cr-Zr alloy after quenching and tempering, sees its mechanical properties markedly increased.
  • the bar obtained is heated to 1000 ° C, then quenched with water and annealed to 475 ° C.
  • This example is a variant of Example 1: copper is replaced by silver.
  • the fiber substrate used is the same as in Example 1.
  • the felt is impregnated with molten silver, at 1000 ° C., under a pressure of 5 bars.
  • the hillette obtained contains 83% by volume of silver.
  • This billet is then hot-spun at 780 ° C in the same die.
  • the bar obtained consists of a cylinder with a diameter of 12 mm and a length of 3 m which is cut into discs 1 mm thick which are used as contacts.
EP85420134A 1984-07-25 1985-07-22 Verfahren zur Herstellung von elektrischen Kontakten Expired EP0171339B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85420134T ATE38738T1 (de) 1984-07-25 1985-07-22 Verfahren zur herstellung von elektrischen kontakten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8412036A FR2568417B1 (fr) 1984-07-25 1984-07-25 Procede de fabrication de contacts electriques et contacts obtenus.
FR8412036 1984-07-25

Publications (2)

Publication Number Publication Date
EP0171339A1 true EP0171339A1 (de) 1986-02-12
EP0171339B1 EP0171339B1 (de) 1988-11-17

Family

ID=9306600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420134A Expired EP0171339B1 (de) 1984-07-25 1985-07-22 Verfahren zur Herstellung von elektrischen Kontakten

Country Status (5)

Country Link
EP (1) EP0171339B1 (de)
JP (1) JPS61107676A (de)
AT (1) ATE38738T1 (de)
DE (1) DE3566323D1 (de)
FR (1) FR2568417B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290311A1 (de) * 1987-05-04 1988-11-09 Merlin Gerin Sinterverbundmaterial für elektrische Kontakte und Kontaktpastille mit Anwendung des genannten Materials
DE3806573A1 (de) * 1988-03-01 1989-09-14 Siemens Ag Kontaktpaar
EP0729162A1 (de) * 1995-02-27 1996-08-28 Schneider Electric Sa Herstellungsverfahren eines elektrischen Verbundkontaktmaterials
EP1477467A1 (de) * 2003-05-16 2004-11-17 Hitachi Metals, Ltd. Verbundwerkstoff mit hoher Wärmeleitfähigkeit und niedrigem Wärmeausdehnungskoeffizienten, und Wärmesenke.
EP1655749A1 (de) 2004-11-08 2006-05-10 Schneider Electric Industries Sas Kontaktpastille für einen beweglichen elektrischen Kontakt eines Schutzschalters, beweglicher elektrischer Kontakt mit einer solchen Pastille und Schutzschalter mit einem solchen Kontakt
CN101151384B (zh) * 2005-03-29 2011-07-06 日立金属株式会社 高热导性石墨粒子分散型复合体及其制造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0628372Y2 (ja) * 1986-09-30 1994-08-03 三菱自動車工業株式会社 自動車のハンドルサポ−ト構造
JP5342315B2 (ja) * 2009-04-24 2013-11-13 パナソニック株式会社 信号用電気接続端子装置及びその製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254189A (en) * 1961-05-15 1966-05-31 Westinghouse Electric Corp Electrical contact members having a plurality of refractory metal fibers embedded therein
FR2115865A5 (en) * 1970-11-24 1972-07-07 Duerrwaechter E Dr Doduco Carbon fibres - satd with copper or silver to form solid soln contact material
FR2203151A1 (de) * 1972-10-17 1974-05-10 Rau Fa G
FR2247544A1 (de) * 1973-10-12 1975-05-09 Rau Fa G

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945743B2 (ja) * 1976-04-19 1984-11-08 田中貴金属工業株式会社 Ａｇ基複合電気接点素材の製造法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254189A (en) * 1961-05-15 1966-05-31 Westinghouse Electric Corp Electrical contact members having a plurality of refractory metal fibers embedded therein
FR2115865A5 (en) * 1970-11-24 1972-07-07 Duerrwaechter E Dr Doduco Carbon fibres - satd with copper or silver to form solid soln contact material
FR2203151A1 (de) * 1972-10-17 1974-05-10 Rau Fa G
FR2247544A1 (de) * 1973-10-12 1975-05-09 Rau Fa G

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290311A1 (de) * 1987-05-04 1988-11-09 Merlin Gerin Sinterverbundmaterial für elektrische Kontakte und Kontaktpastille mit Anwendung des genannten Materials
FR2615046A1 (fr) * 1987-05-04 1988-11-10 Merlin Gerin Materiau composite fritte pour contact electrique et pastille de contact utilisant ledit materiau
US4919717A (en) * 1987-05-04 1990-04-24 Merlin Gerin Sintered composite material for electrical contact
DE3806573A1 (de) * 1988-03-01 1989-09-14 Siemens Ag Kontaktpaar
EP0729162A1 (de) * 1995-02-27 1996-08-28 Schneider Electric Sa Herstellungsverfahren eines elektrischen Verbundkontaktmaterials
FR2731106A1 (fr) * 1995-02-27 1996-08-30 Schneider Electric Sa Procede de fabrication d'un materiau de contact electrique composite
EP1477467A1 (de) * 2003-05-16 2004-11-17 Hitachi Metals, Ltd. Verbundwerkstoff mit hoher Wärmeleitfähigkeit und niedrigem Wärmeausdehnungskoeffizienten, und Wärmesenke.
US7282265B2 (en) 2003-05-16 2007-10-16 Hitachi Metals, Ltd. Composite material having high thermal conductivity and low thermal expansion coefficient, and heat-dissipating substrate, and their production methods
EP2179976A1 (de) * 2003-05-16 2010-04-28 Hitachi Metals, Ltd. Verbundwerkstoff mit hoher Wärmeleitfähigkeit und niedrigem Wärmeausdehnungskoeffizienten, und Wärmesenke.
US7708050B2 (en) 2003-05-16 2010-05-04 Hitachi Metals, Ltd. Composite material, having high thermal conductivity and low thermal expansion coefficient, and heat-dissipating substrate, and their production methods
US7923103B2 (en) 2003-05-16 2011-04-12 Hitachi Metals, Ltd. Composite material, having high thermal conductivity and low thermal expansion coefficient, and heat-dissipating substrate, and their production methods
EP1655749A1 (de) 2004-11-08 2006-05-10 Schneider Electric Industries Sas Kontaktpastille für einen beweglichen elektrischen Kontakt eines Schutzschalters, beweglicher elektrischer Kontakt mit einer solchen Pastille und Schutzschalter mit einem solchen Kontakt
CN101151384B (zh) * 2005-03-29 2011-07-06 日立金属株式会社 高热导性石墨粒子分散型复合体及其制造方法

Also Published As

Publication number Publication date
FR2568417A1 (fr) 1986-01-31
EP0171339B1 (de) 1988-11-17
DE3566323D1 (en) 1988-12-22
ATE38738T1 (de) 1988-12-15
FR2568417B1 (fr) 1986-11-28
JPS61107676A (ja) 1986-05-26

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