The microstructural evolution of infrared brazed Fe3Al by BNi-2 braze alloy
作者： Y.L. Lee , R.K. Shiue , S.K. Wu
DOI: 10.1016/S0966-9795(02)00252-2
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摘要: Abstract The present work reports a novel approach in joining Fe3Al by infrared vacuum brazing using BNi-2 (7.0 Cr, 3.1 B, 4.5 Si, 3.0 Fe, 0.06C, and Ni balance) as the filler alloy. Based on related alloy phase diagrams solidification theory, species morphology of phases brazed joint are extensively examined. Many transient phases, including: (Ni,Fe)3Al, (Ni,Fe)3(Si,Al), (Fe,Ni,Cr)3B BCr, were observed after brazing. With increasing homogenization time brazement at 1000 °C, stoichiometry both (Ni,Fe)3Al (Ni,Fe)3(Si,Al) has changed into (Ni,Fe)2Al (Ni,Fe)2(Si,Al), respectively. Meanwhile, amounts chromium boride greatly decreased. Finally, single-phase can be obtained if sufficient is applied treatment brazement.
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