Iron-based brazing foil and method for brazing

Details Iron-based brazing foil and method for brazing Iron-based brazing foil and method for brazing

2008-06-03

2011-11-08

Wyszomierski, George (Department: 1733)

Metal treatment

Stock

Amorphous, i.e., glassy

C148S330000, C420S087000, C420S092000, C420S093000

Reexamination Certificate

active

08052809

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.

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