Iron-based brazing foil and method for brazing

US8951368B2 · kind B2 · utility

Assignee

• Vacuumschmelze GmbH & Co. KG · DE

Inventors

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

Key dates

• Filing date: Sep 21, 2011
• Grant date: Feb 10, 2015
• Expiry date: May 12, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12951
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Disclosed are amorphous, ductile brazing foils with a composition consisting essentially of FeRestNiaCrbSicBdPe, wherein 0 atomic %≦a<25 atomic %; 0 atomic %≦b≦15 atomic %; 1 atomic %≦c≦10 atomic %; 4 atomic %≦d≦15 atomic %; 1 atomic %≦e≦9 atomic %; any impurities≦0.5 atomic %; rest Fe, wherein 2 atomic %≦c+e≦10 atomic % and 15 atomic %≦c+d+e≦22 atomic %, or consisting essentially of FeRestNiaCrbMofCugSicBdPe, wherein 0 atomic %≦a<25 atomic %; 0 atomic %≦b≦15 atomic %; 1 atomic %<c≦10 atomic %; 4 atomic %≦d≦15 atomic %; 1 atomic %≦e≦9 atomic %; 0 atomic %<f≦3 atomic %; 0 atomic %≦g≦3 atomic %; any impurities≦0.5 atomic %; rest Fe, wherein 2 atomic %≦c+e≦10 atomic % and 15 atomic %≦c+d+e≦22 atomic %. Also disclosed are brazed objects formed using these foils, particularly exhaust gas recirculation coolers and oil coolers, and methods for making the brazing foils and for making the brazed parts.