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High‐Temperature Brazing of Superalloys and Stainless Steels with Novel Ductile Ni‐Hf‐Based Filler Metals
Author(s) -
Lugscheider E.,
Humm S.
Publication year - 2002
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/1527-2648(200203)4:3<138::aid-adem138>3.0.co;2-y
Subject(s) - brazing , materials science , metallurgy , superalloy , inconel , nickel , melting point , filler (materials) , filler metal , wetting , composite material , microstructure , welding , alloy , arc welding
Nickel‐based filler metals are generally used for brazing superalloys and high‐alloyed steels to give joints with high‐temperature resistance and corrosion resistance. The use of hafnium as a melting point depressant for nickel based filler metals instead of the conventional metalloids represents a metallurgical approach to produce ductile nickel brazing alloys with moderate brazing temperatures. Here the authors show that especially alloys of the system Ni‐Hf‐Cr possess suitable properties in terms of flowing and wetting behaviour on stainless steel and inconel 600. These new Ni‐based filler metals are rollable and possesses high tolerances in terms of brazing gaps.