A HIGH TEMPERATURE Ni-Cr-Co-B BRAZING FILLER ALLOY
LIU Weiping(Dalian Railway institute; Dalian 116028); ZHUANG Hongshou(BeUing University of Aeronautics and Astronautics; Beijing 100083)
Cite this article:
LIU Weiping(Dalian Railway institute; Dalian 116028); ZHUANG Hongshou(BeUing University of Aeronautics and Astronautics; Beijing 100083). A HIGH TEMPERATURE Ni-Cr-Co-B BRAZING FILLER ALLOY. Acta Metall Sin, 1995, 31(24): 539-544.
Abstract For improving the toughness and elevated temperature mechanical properties of brazed superalloy joints, the silicon－free Ni-CrCo-B brazing filler alloys have been developed. The microstructure, melting characteristics and brazing properties of a series of Ni-CrCo-B filler metals were investigated. Mechanical properties at room and elevated temperatures of superalloy joints brazed with the Ni-Cr-Co-B filler metals were evaluated and compared with those of brazed joints with conventional nickel-base filler metals BNi-1a and BNi-5. It was shown that the toughness and high-temperature mechanical properties of the brazed joints made with the developed Ni-Cr-Co-B filler alloys are better than the latter.
