Patent · US Active

Method for producing a semifinished product and semifinished product for electrical contacts and contact piece

US8980166B2 · kind B2 · utility

1Cited by

11References

17Claims

0Family size

Assignee

Doduco GmbH · DE

Inventors

Helmut Heinzel · Tiefenbronn, DE
Andreas Kraus · Waldenbuch, DE
Evelyn Mahle-Moessner · Pforzheim, DE
Johann Wenz · Pforzheim, DE

Key dates

Filing date	Oct 27, 2009
Grant date	Mar 17, 2015
Priority date	—
Expiry date	Jul 8, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C32/0021
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a method for producing a strand-like, particularly band-like semi-finished part for electrical contacts, wherein the semi-finished part has a top side intended for making the electrical contact, said top side made from a silver-based composite material in which one or multiple metal oxides or carbon are embedded, and has a carrier layer supporting the composite material made of silver or a silver-based alloy, said method having the following steps: Powder-metallurgic production of a block made from the silver-based composite material, encasing of the block made of the composite material with a powder made primarily of silver, compressing the block, encased by the metal powder, to condense the metal powder, sintering the compressed block, reshaping the sintered block by extrusion pressing, creating a partial strand with a top side made from composite material and a bottom side made from silver or a silver-based alloy.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.