EP1387370A1 - Bandförmiges Halbzeug - Google Patents
Bandförmiges Halbzeug Download PDFInfo
- Publication number
- EP1387370A1 EP1387370A1 EP03017226A EP03017226A EP1387370A1 EP 1387370 A1 EP1387370 A1 EP 1387370A1 EP 03017226 A EP03017226 A EP 03017226A EP 03017226 A EP03017226 A EP 03017226A EP 1387370 A1 EP1387370 A1 EP 1387370A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- band
- finished product
- carrier
- product according
- contact layer
- 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.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
-
- 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
- H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
- H01H1/02372—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te
- H01H1/02376—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te containing as major component SnO2
-
- 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
- H01H1/0231—Composite material having a noble metal as the basic material provided with a solder layer
-
- 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
- H01H1/025—Composite material having copper as the basic material
Definitions
- the invention relates to a band-shaped semi-finished product according to claim 1 and Process for its manufacture according to claim 12.
- Multilayer semi-finished products also referred to as contact profiles, are known in technology known, which are used to produce contacts for switches.
- Such Semi-finished products consist of at least two layers, namely a carrier and a contact layer connected to the carrier.
- the contact layer is used for safe switching, that is Opening, closing and conducting electrical contact with a Counter contact and must therefore have special switching properties.
- a high erosion resistance is necessary so that the contact layer also the required number of switching operations for given current / voltage conditions survives. It should also be ensured that the contact layer is resistant to welding to the mating contact and a low, constant contact resistance over the service life having.
- the composition of the contact layer must be frequent should be selected so that material migration is as low as possible even with DC operation occurs.
- the carrier is primarily needed for the semi-finished product with a contact carrier, for example a spring, connect, usually weld to be able to. Accordingly, a material must be selected that has a has low conductivity and good weldability.
- a contact carrier for example a spring
- the materials for Carrier and contact layer are chosen so that they are metallurgical and also connect well with one another with regard to the electrical properties leave, the connection done for example by roll cladding can. It is also known in the art between the contact layer and carrier to provide another layer, the connectivity of the two layers improved when using oxide-containing contact layers.
- a large number of metals or metal alloys are known in the art, which are suitable for producing the carrier or the contact layer are.
- the carrier (there as Core area) made of an alloy of 2% by weight of tin, 9% by weight Nickel, rest copper.
- a gold alloy serves as the contact layer or a silver-palladium alloy.
- the semifinished product described an additional welding layer made of silver. It is especially for welding on copper, but not suitable for welding onto steel.
- DE 41 26 219 C2 discloses a contact layer made of a silver-tin oxide alloy to use with a contact plate.
- the back of the contact plate here consists of silver, which makes both a good Connectivity, as well as good weldability on a contact carrier results.
- the precious metal portion in the contact layer accounts for a substantial part of the total cost of the semi-finished product, it is of course desirable that To reduce precious metal content in the contact layer as much as possible, or that Make the contact layer as thin as possible, and especially on expensive ones To avoid precious metals such as gold or palladium. In doing so, of course the mechanical and electrical properties are retained, in particular it is necessary that the contact layer and the carrier are covered by common Manufacturing process, especially by roll cladding, an intimate Connect with each other.
- such a semi-finished product for the production of AC and DC switches with nominal currents up to approx. 35 A may be suitable, whereby a main area of application for applications with rated currents between 2 and 16 A is.
- contact layers made of a silver-tin oxide alloy have very good burning properties and therefore the layer accordingly can be made thin and material-saving. It has now found that for a contact layer made of silver-tin oxide a carrier made of a copper alloy can be used, if this copper alloy contains tin. The reason for this seems to be there lie that tin oxide and tin dissolve into each other, so that in the Transition layer between the contact layer and the carrier a kind of alloy trains, which enables optimal heat transport and thereby a detachment of the contact layer from the carrier even under high loads prevented.
- a carrier consisting of such an alloy is without an additional one Solder or weld layer for later welding to a contact carrier suitable, so that the entire semi-finished product is built up in two layers can what compared to a corresponding production simplification leads to three and multi-layer semi-finished products.
- a carrier is made of an alloy specified here for direct welding on a contact carrier, for example made of Steel, suitable, so that the contact layer on its underside according to claim 7 preferably has weld nipples, their preferred geometry is specified in claims 8 and 9. It turned out here that Weld nipples with essentially flat contact areas to be defined Welded connections than the previously tapered or semicircular ones Lead sweat warts.
- the band-shaped semi-finished product according to the invention by hot roll plating in the presence of a reducing gas, preferably of a hydrogen-nitrogen mixture.
- Figure 1 shows a cross section through a band-shaped semifinished product that two layers, namely the carrier 10 and the contact layer 20.
- the carrier preferably consists of an alloy with 9% nickel, 2% tin, Balance copper (CuNi9Sn2).
- CuNi9Sn2 Balance copper
- At the bottom of the carrier are in the longitudinal direction extending weld nipples 11 are formed, which essentially one have a rectangular cross section.
- This has a rectangular cross section the advantage that when the semi-finished product is welded to a Contact carrier a mechanically stable and very defined connection can be generated.
- constant welding parameters are achieved, which are rounded or tapered Welding nipples cannot be achieved, since these are during the welding process deform and therefore do not allow constant welding.
- the contact layer 20, which in this exemplary embodiment consists of powder-metallurgically produced AgSnO 2 with 2% by weight tin oxide, the rest silver, is plated onto the carrier.
- the thickness of the carrier 10 including welding nipples is approximately 0.5 mm, the thickness of the contact layer 0.3 mm.
- the production takes place as shown schematically in FIG. 2.
- the two Bands 15 and 25 are fed to the processing space 32 via locks 31, by warming each other by means of the two rollers 13 and 23 be plated.
- There is a reducing hydrogen atmosphere in the work area a reduction in the tin oxide in the boundary layer of the contact layer to effect tin. This increases the solubility of the two alloys into each other further increases what the cohesion of the two layers further improved.
- the two pre-strips can the final shaping can be fed directly to the rolls without any preforming of the semi-finished product, especially the shape of the weld nipples 11 takes place simultaneously with the plating process, for which the lower roller has a corresponding profile, see FIG. 3a.
- the semifinished product leaves the processing space via a further lock 31.
- the semifinished product is then subjected to a diffusion annealing process subjected.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Contacts (AREA)
Abstract
Description
- Figur 1:
- Einen Querschnitt durch ein erfindungsgemäßes bandförmiges Halbzeug,
- Figur 2:
- eine Prinzipdarstellung der Herstellung eines erfindungsgemäßen Halbzeuges,
- Figur 3a:
- einen Schnitt entlang der Linie A-A aus Figur 2,
- Figur 3b:
- einen Schnitt entlang der Linie B-B aus Figur 2, und
- Figur 3c:
- einen Schnitt entlang der Linie C-C aus Figur 2.
Claims (14)
- Bandförmiges Halbzeug zur Herstellung elektrischer Kontakte mit:einem bandförmigen Träger (10) aus einer Kupfer-Zinn-Legierung undeinem auf einer ersten Bandseite des Trägers aufplattierten Kontaktschicht (20),
- Bandförmiges Halbzeug nach Anspruch 1, dadurch gekennzeichnet, dass die Kupfer-Zinnlegierung des Trägers weiterhin Nickel, vorzugsweise zwischen 7 und 11 Gew-%, aufweist.
- Bandförmiges Halbzeug nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass der Zinnanteil in der Kupfer-Zinnlegierung des Trägers etwa 1 - 6, vorzugsweise 2 - 4 Gew.-% beträgt.
- Bandförmiges Halbzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Zinnoxid-Anteil in der Silber-Zinnoxid-Legierung der Kontaktschicht etwa 1 - 6, vorzugsweise 2 - 4 Gew.-% beträgt.
- Bandförmiges Halbzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Zinnanteil in der Kupfer-Zinnlegierung des Trägers und der Zinnoxid-Anteil in der Silber-Zinnoxid-Legierung der Kontaktschicht im Wesentlichen gleich groß sind.
- Bandförmiges Halbzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die für die Kontaktschicht verwendete Silber-Zinnoxid-Legierung pulvermetallurgisch hergestellt ist.
- Bandförmiges Halbzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Träger Schweißwarzen (11) aufweist.
- Bandförmiges Halbzeug nach Anspruch 7, dadurch gekennzeichnet, dass die Schweißwarzen sich in Längsrichtung erstreckende Stege mit einer flächigen Unterseite sind.
- Bandförmiges Halbzeug nach Anspruch 8, dadurch gekennzeichnet, dass die Stege einen im wesentlichen rechteckigen Querschnitt haben.
- Bandförmiges Halbzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass es keine weiteren Schichten aufweist.
- Bandförmiges Halbzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Kontaktschicht zwischen 0,025 und 0,4 mm dick ist.
- Verfahren zum Herstellen eines bandförmigen Halbzeuges nach einem der Ansprüche 1 - 11, wobei die Kontaktschicht auf den Träger aufplattiert wird, dadurch gekennzeichnet, dass das Plattieren in einer Atmosphäre geschieht, in der ein reduzierendes Gas vorhanden ist.
- Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass das reduzierende Gas Wasserstoff ist.
- Verfahren nach Anspruch 12 oder 13, soweit sie sich auf die Ansprüche 7 bis 9 beziehen, dadurch gekennzeichnet, dass die Schweißwarzen während des Plattiervorgangs aus dem Träger ausgeformt werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10235723 | 2002-08-03 | ||
DE10235723 | 2002-08-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1387370A1 true EP1387370A1 (de) | 2004-02-04 |
Family
ID=30010602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03017226A Withdrawn EP1387370A1 (de) | 2002-08-03 | 2003-07-30 | Bandförmiges Halbzeug |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1387370A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1868219A1 (de) * | 2006-06-14 | 2007-12-19 | Abb Research Ltd. | Kontaktor |
CN100552845C (zh) * | 2007-09-27 | 2009-10-21 | 天津大学 | 银基氧化锡梯度电触头材料及制备方法 |
CN101350255B (zh) * | 2008-08-12 | 2010-06-09 | 浙江亚通金属陶瓷有限公司 | 铜铬-铜复合触头材料及其制造方法 |
RU2777829C1 (ru) * | 2021-08-31 | 2022-08-11 | Федеральное государственное бюджетное учреждение науки Институт металлургии Уральского отделения Российской академии наук (ИМЕТ УрО РАН) | Способ изготовления бислойной порошковой полосы на основе меди для сильноточных разрывных электрических контактов |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2486341A (en) * | 1945-06-30 | 1949-10-25 | Baker & Co Inc | Electrical contact element containing tin oxide |
US2688574A (en) * | 1951-12-06 | 1954-09-07 | Western Electric Co | Method of making bimetal contact tape |
US4342893A (en) * | 1978-10-14 | 1982-08-03 | Wc Heraeus Gmbh | Composite electrical contact and bonding material |
EP0299099A1 (de) * | 1987-07-14 | 1989-01-18 | INOVAN GmbH & Co. KG Metalle und Bauelemente | Verfahren zum Herstellen von Silber/Me0-Kontaktplättchen mit löt- oder schweissfähiger Unterseite |
DE4126219A1 (de) * | 1991-08-08 | 1993-02-11 | Duerrwaechter E Dr Doduco | Verfahren zum herstellen von kontaktplaettchen |
US5883352A (en) * | 1995-02-09 | 1999-03-16 | W.C. Heraeus Gmbh | Welding process |
-
2003
- 2003-07-30 EP EP03017226A patent/EP1387370A1/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2486341A (en) * | 1945-06-30 | 1949-10-25 | Baker & Co Inc | Electrical contact element containing tin oxide |
US2688574A (en) * | 1951-12-06 | 1954-09-07 | Western Electric Co | Method of making bimetal contact tape |
US4342893A (en) * | 1978-10-14 | 1982-08-03 | Wc Heraeus Gmbh | Composite electrical contact and bonding material |
EP0299099A1 (de) * | 1987-07-14 | 1989-01-18 | INOVAN GmbH & Co. KG Metalle und Bauelemente | Verfahren zum Herstellen von Silber/Me0-Kontaktplättchen mit löt- oder schweissfähiger Unterseite |
DE4126219A1 (de) * | 1991-08-08 | 1993-02-11 | Duerrwaechter E Dr Doduco | Verfahren zum herstellen von kontaktplaettchen |
US5883352A (en) * | 1995-02-09 | 1999-03-16 | W.C. Heraeus Gmbh | Welding process |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1868219A1 (de) * | 2006-06-14 | 2007-12-19 | Abb Research Ltd. | Kontaktor |
CN100552845C (zh) * | 2007-09-27 | 2009-10-21 | 天津大学 | 银基氧化锡梯度电触头材料及制备方法 |
CN101350255B (zh) * | 2008-08-12 | 2010-06-09 | 浙江亚通金属陶瓷有限公司 | 铜铬-铜复合触头材料及其制造方法 |
RU2777829C1 (ru) * | 2021-08-31 | 2022-08-11 | Федеральное государственное бюджетное учреждение науки Институт металлургии Уральского отделения Российской академии наук (ИМЕТ УрО РАН) | Способ изготовления бислойной порошковой полосы на основе меди для сильноточных разрывных электрических контактов |
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