Patent · US Active

Copper-based brazing alloy and brazing process

US7654438B2 · kind B2 · utility

0Cited by

8References

4Claims

0Family size

Assignee

Vacuumschmelze GmbH & Co. KG · DE

Inventors

Thomas Hartmann · Friedland, DE
Dieter Nuetzel · Großkrotzenburg, DE

Key dates

Filing date	Nov 10, 2008
Grant date	Feb 2, 2010
Priority date	—
Expiry date	Nov 10, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C9/06
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention proposes a brazing alloy, which can be produced in particular as a homogenous, ductile, amorphous brazing foil and consists of 2 to 20 atom % of nickel, 2 to 12 atom % of tin, 0.5 to 5.0 atom % of zinc, 6 to 16 atom % of phosphorus, remainder copper and incidental impurities. The total amount of copper, nickel, tin and zinc is between 80 and 95 atom %. The addition of more than 0.5 atom % of zinc produces excellent resistance to surface oxidation in air and/or atmospheric humidity. These brazing alloys can be used to produce excellent brazed joints.

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