Iron-based braze filler metal for high-temperature applications

This invention relates to brazing filler metal compositions that have excellent wettability to nickel/cobalt/iron-based base metals and produce braze joints with high strength and heat/corrosion resistance. The iron-based braze filler metal of the present invention comprises chromium in amounts betw...

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Bibliographische Detailangaben
Hauptverfasser:	FORTUNA, DIENTJE J, RANGASWAMY, SUBRAMANIAM
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	This invention relates to brazing filler metal compositions that have excellent wettability to nickel/cobalt/iron-based base metals and produce braze joints with high strength and heat/corrosion resistance. The iron-based braze filler metal of the present invention comprises chromium in amounts between about 20 to 35 percent by weight, silicon in amounts between about 3 to 12 percent by weight, and phosphorus in amounts between about 3 to 12 percent by weight; the balance being iron. These filler metals are suitable for the manufacture of several different types of heat exchangers and catalytic converters at a significantly lower cost compared to currently known braze filler metal compositions.