EP0586411A1 - Kontaktwerkstoff auf silberbasis zur verwendung in schaltgeräten der energietechnik sowie verfahren zur herstellung von kontaktstücken aus diesem werkstoff. - Google Patents
Kontaktwerkstoff auf silberbasis zur verwendung in schaltgeräten der energietechnik sowie verfahren zur herstellung von kontaktstücken aus diesem werkstoff.Info
- Publication number
- EP0586411A1 EP0586411A1 EP92909684A EP92909684A EP0586411A1 EP 0586411 A1 EP0586411 A1 EP 0586411A1 EP 92909684 A EP92909684 A EP 92909684A EP 92909684 A EP92909684 A EP 92909684A EP 0586411 A1 EP0586411 A1 EP 0586411A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- iron
- rhenium
- material according
- silver
- 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
Links
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
- H01H1/023—Composite material having a noble metal as the basic material
Definitions
- the invention relates to a silver-based contact material for use in switchgear in power engineering, in particular for contact pieces in low-voltage switches, which, in addition to silver, contains at least one higher-melting metal, a metal alloy or a metal compound as further active components.
- the invention also relates to a method for producing contact pieces from such a material.
- contact pieces in low-voltage switching devices in energy technology e.g. In circuit breakers as well as in direct current, motor and auxiliary contactors
- contact materials of the silver-metal system AgMe
- Examples of this system are silver-nickel (AgNi) and silver-iron (AgFe).
- Silver-nickel has advantageous contact properties which, together with the test methods for contact materials, for example in INT.J. Powder Metallurgy and Powder Technology, Vol. 12 (1976), P 219-228.
- nickel dust in particular has harmful effects on the human organism.
- DE-C-38 16 895 describes the use of a silver-iron workpiece with 3 to 30% by weight of iron and one or more of the additives manganese, copper, zinc, antimony, bismuth oxide, molybdenum oxide, tungsten oxide, chromium nitride Quantities totaling 0.05 to 5% by weight, the rest silver proposed for electrical contacts.
- DE-A-39 11 904 discloses a powder metallurgical process for producing a semi-finished product for electrical contacts from a silver-based composite material with iron, in which 5 to 50% by weight of iron is the first secondary component and 0 to 5% by weight. % of a second minor component from one or more substances from the group containing the metals titanium, zirconium, niobium, tantalum, molybdenum, manganese, copper and zinc as well as their oxides and their carbides.
- the object of the invention is a further contact material on silver egg to find the sen base and the associated manufacturing process.
- the new material should be characterized by low contact heating with stable heating behavior, acceptable tendency to weld and a long service life in relation to the specified switching currents.
- the object is achieved according to the invention in a material of the type mentioned at the outset that the active components in combination are iron in mass fractions between 1 and 50% and rhenium in mass fractions between 0.01 and 5%.
- the iron and the iron are iron in mass fractions between 1 and 50% and rhenium in mass fractions between 0.01 and 5%.
- Rhenium can be added to the silver in the form of pure metals and / or as an alloy, the material being produced by powder metallurgy.
- the ratio of the mass fractions of iron to rhenium can be between approximately 4: 1 and approximately 20: 1.
- the iron content will be considerably less than 50%.
- the iron will be present in mass fractions of 2 to 25% and the rhenium in mass fractions of 0.1 to 3%.
- Switching tests with contact materials in which the iron is in a mass fraction of 2 to 10% and the rhenium in a mass fraction of 0.1 to 1% have shown particularly advantageous results.
- the total volume fraction of the two active components can fluctuate within comparatively wide limits. For example, it is 6, 12 or 18%.
- the table comprises six exemplary embodiments with meaningful compositions of the claimed silver-iron-rhenium contact material.
- manufacture the actual material and the manufacture of the relevant contact pieces is carried out according to partly different methods.
- the measured values of the individual AgFeRe materials are compared with AgFe9 and AgRe20 and with pure silver. The results are discussed in more detail below.
- Rhenium melted an iron-rhenium alloy. This alloy melt is atomized in the molten state by known methods, so that in each case one
- FeRe composite powder is present. A particle size of about 25 ⁇ m is sieved out of the powder.
- a corresponding amount of commercially available silver powder is then weighed into the alloy powder, so that a material with a mass fraction of 5.7 iron-rhenium and the rest silver is formed.
- molded parts are pressed from the powder mixture into contact pieces at a pressure of approx. 200 MPa.
- the molded parts are sintered at a temperature of approximately 850 ° C. for about an hour in a vacuum or under protective gas.
- the sintered bodies are pressed at a pressure of approx. 1000 MPa and sintered again at approx. 650 oC for about an hour in a vacuum or under protective gas.
- the contact pieces thus produced are again calibrated at a pressure of approx. 1000 MPa.
- the proportions of silver and FeRe alloy can be varied using the same procedure. A material with 9, 9 parts by mass of FeRe20, the rest silver, was specifically examined.
- Another process uses separate powders of iron, rhenium and silver as the starting material.
- a powder mixture is prepared by wet mixing the individual powders. From the powder mixture, strips or wires of the material are first produced as semi-finished products using the so-called extrusion technique. The process conditions with regard to temperature on the one hand and pressure on the other hand are in the known order of magnitude. Contact pieces with a directional structure can then be separated from the semi-finished product thus produced.
- the powder metallurgical method for producing the additional components three materials were produced in which the ratio of iron to rhenium is approximately 4: 1 or 9: 1. The total proportion of the additional components was selected as an alternative to 5.3 m%, 5.7 m% and 9.4 m%. Another material was made with a ratio of
- the alloys or the powder mixtures can be produced by so-called mechanical alloying of single-component individual powders.
- the structural properties of the finished material are advantageously influenced.
- the table shows that in all five examples of the material according to the invention according to different methods or the contact pieces made therefrom, there are sufficient switching numbers, which are in each case more than 50,000. Such switching numbers cannot be achieved with silver-rhenium or pure silver.
- the overtemperature in the switching device is decisive for the use of the switching material.
- the latter can be at different points of the
- Switching device are measured and is detected directly at the bridge in the present investigations. In this respect, the comparative examples must be observed.
- pure silver or silver-rhenium 20 has a favorable overtemperature behavior with, however, low switching numbers.
- AgFe9 shows such a high excess temperature that is no longer accepted in practice.
- the high excess temperature can be explained by the formation of the cover layer, which increases the contact resistance and thus leads to increased heating at the contact.
- all examples of the material according to the invention show that the excess temperature is reduced.
- the values of pure silver or silver-rhenium are not reached, the order of magnitude permits the use of the material in switchgear. It must be taken into account that the maximum overtemperature values of the contact bridge are given in the first column. If you also take into account the average bridge temperatures according to the last column, you get extremely favorable values there.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Contacts (AREA)
- Powder Metallurgy (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Manufacture Of Switches (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4117312A DE4117312A1 (de) | 1991-05-27 | 1991-05-27 | Kontaktwerkstoff auf silberbasis zur verwendung in schaltgeraeten der energietechnik sowie verfahren zur herstellung von kontaktstuecken aus diesem werkstoff |
DE4117312 | 1991-05-27 | ||
PCT/DE1992/000384 WO1992022079A1 (de) | 1991-05-27 | 1992-05-13 | Kontaktwerkstoff auf silberbasis zur verwendung in schaltgeräten der energietechnik sowie verfahren zur herstellung von kontaktstücken aus diesem werkstoff |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0586411A1 true EP0586411A1 (de) | 1994-03-16 |
EP0586411B1 EP0586411B1 (de) | 1995-07-19 |
Family
ID=6432545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92909684A Expired - Lifetime EP0586411B1 (de) | 1991-05-27 | 1992-05-13 | Kontaktwerkstoff auf silberbasis zur verwendung in schaltgeräten der energietechnik sowie verfahren zur herstellung von kontaktstücken aus diesem werkstoff |
Country Status (9)
Country | Link |
---|---|
US (1) | US5422065A (de) |
EP (1) | EP0586411B1 (de) |
JP (1) | JP3280967B2 (de) |
AT (1) | ATE125389T1 (de) |
BR (1) | BR9206059A (de) |
DE (2) | DE4117312A1 (de) |
DK (1) | DK0586411T3 (de) |
ES (1) | ES2074363T3 (de) |
WO (1) | WO1992022079A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0774523A1 (de) | 1995-11-20 | 1997-05-21 | Degussa Aktiengesellschaft | Silber-Eisen-Werkstoff für elektrische Schaltkontakte (III) |
WO1997027601A3 (de) * | 1996-01-26 | 1997-10-09 | Siemens Ag | Verfahren zur herstellung eines formstücks aus einem kontaktwerkstoff auf silberbasis |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4205763A1 (de) * | 1992-02-25 | 1993-08-26 | Siemens Ag | Sinterkontaktwerkstoff auf silberbasis zur verwendung in schaltgeraeten der energietechnik |
JP3467527B2 (ja) * | 1992-12-17 | 2003-11-17 | 株式会社山王 | 接点材料及びその製造方法 |
DE4344322A1 (de) * | 1993-12-23 | 1995-06-29 | Siemens Ag | Sinterkontaktwerkstoff |
DE19543222C1 (de) * | 1995-11-20 | 1997-02-20 | Degussa | Silber-Eisen-Werkstoff für elektrische Schaltkontakte (I) |
DE19543208C1 (de) * | 1995-11-20 | 1997-02-20 | Degussa | Silber-Eisen-Werkstoff für elektrische Schaltkontakte (II) |
DE19607183C1 (de) * | 1996-02-27 | 1997-04-10 | Degussa | Gesinterter Silber-Eisen-Werkstoff für elektrische Kontakte und Verfahren zu seiner Herstellung |
DE19608490C1 (de) * | 1996-03-05 | 1997-09-04 | Siemens Ag | Kontaktwerkstoff aus Silber und Wirkkomponenten, daraus gefertigtes Formstück sowie Verfahren zur Herstellung des Formstücks |
US5831186A (en) * | 1996-04-01 | 1998-11-03 | Square D Company | Electrical contact for use in a circuit breaker and a method of manufacturing thereof |
CN105463235A (zh) * | 2015-12-23 | 2016-04-06 | 四川飞龙电子材料有限公司 | 一种银铁铼电接触材料的制备方法 |
CN107299244B (zh) * | 2017-06-09 | 2019-07-16 | 佛山通宝精密合金股份有限公司 | 一种制备高性能AgFeRe材料的方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE747830C (de) * | 1941-06-17 | 1945-01-20 | Verwendung von Goldlegierungen fuer elektrische Kontakte | |
US2365249A (en) * | 1942-07-21 | 1944-12-19 | Baker & Co Inc | Electrical contact element |
DE888178C (de) * | 1943-04-04 | 1953-08-31 | Degussa | Auf pulvermetallurgischem Wege hergestellter Kontaktwerkstoff aus Metallen mit guter elektrischer Leitfaehigkeit und einer Hartstoffkomponente |
DE1086441B (de) * | 1958-07-15 | 1960-08-04 | Degussa | Verwendung von Palladium-Rhenium-Legierungen als Werkstoff fuer elektrische Kontakte |
US3310718A (en) * | 1964-04-07 | 1967-03-21 | Nytronics Inc | Impedance element with alloy connector |
US3511953A (en) * | 1968-06-06 | 1970-05-12 | Guardian Electric Mfg Co | Silver rhenium electric contacts |
US4081644A (en) * | 1972-06-29 | 1978-03-28 | Plessey Handel Investments A.G. | Electrical contact material |
GB2203167B (en) * | 1987-03-25 | 1990-11-28 | Matsushita Electric Works Ltd | Composite conductive material and method for manufacturing same |
YU46258B (sh) * | 1987-06-06 | 1993-05-28 | Degussa Ag. | Primena srebrno gvozdenog materijala za električne kontakte |
DE3816895A1 (de) * | 1987-06-06 | 1988-12-22 | Degussa | Verwendung eines silber-eisen-werkstoffs fuer elektrische kontakte |
DE3802811A1 (de) * | 1988-01-30 | 1989-08-10 | Starck Hermann C Fa | Agglomerierte metall-verbund-pulver, verfahren zu ihrer herstellung sowie deren verwendung |
EP0338401B1 (de) * | 1988-04-16 | 1995-09-27 | DODUCO GMBH + Co Dr. Eugen DÀ¼rrwächter | Pulvermetallurgisches Verfahren zum Herstellen eines Halbzeugs für elektrische Kontakte aus einem Verbundwerkstoff auf Silberbasis mit Eisen |
DE3911904A1 (de) * | 1988-04-16 | 1989-12-14 | Duerrwaechter E Dr Doduco | Pulvermetallurgisches verfahren zum herstellen eines halbzeugs fuer elektrische kontakte aus einem verbundwerkstoff auf silberbasis mit eisen |
EP0414709B1 (de) * | 1988-04-20 | 1993-07-21 | Siemens Aktiengesellschaft | Sinterkontaktwerkstoff auf silberbasis zur verwendung in schaltgeräten der energietechnik, insbesondere für kontaktstücke in niederspannungsschaltern |
-
1991
- 1991-05-27 DE DE4117312A patent/DE4117312A1/de not_active Withdrawn
-
1992
- 1992-05-13 BR BR9206059A patent/BR9206059A/pt not_active IP Right Cessation
- 1992-05-13 DK DK92909684.0T patent/DK0586411T3/da active
- 1992-05-13 ES ES92909684T patent/ES2074363T3/es not_active Expired - Lifetime
- 1992-05-13 WO PCT/DE1992/000384 patent/WO1992022079A1/de active IP Right Grant
- 1992-05-13 EP EP92909684A patent/EP0586411B1/de not_active Expired - Lifetime
- 1992-05-13 DE DE59202973T patent/DE59202973D1/de not_active Expired - Fee Related
- 1992-05-13 JP JP50895992A patent/JP3280967B2/ja not_active Expired - Fee Related
- 1992-05-13 US US08/142,354 patent/US5422065A/en not_active Expired - Lifetime
- 1992-05-13 AT AT92909684T patent/ATE125389T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9222079A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0774523A1 (de) | 1995-11-20 | 1997-05-21 | Degussa Aktiengesellschaft | Silber-Eisen-Werkstoff für elektrische Schaltkontakte (III) |
WO1997027601A3 (de) * | 1996-01-26 | 1997-10-09 | Siemens Ag | Verfahren zur herstellung eines formstücks aus einem kontaktwerkstoff auf silberbasis |
Also Published As
Publication number | Publication date |
---|---|
ES2074363T3 (es) | 1995-09-01 |
JPH06507446A (ja) | 1994-08-25 |
DE59202973D1 (de) | 1995-08-24 |
US5422065A (en) | 1995-06-06 |
BR9206059A (pt) | 1994-12-20 |
DK0586411T3 (da) | 1995-12-04 |
JP3280967B2 (ja) | 2002-05-13 |
WO1992022079A1 (de) | 1992-12-10 |
EP0586411B1 (de) | 1995-07-19 |
DE4117312A1 (de) | 1992-12-03 |
ATE125389T1 (de) | 1995-08-15 |
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