Abstract
Erosion phenomenon during the diode laser brazing of Inconel600 alloy with Au-18%Ni filler metal has been investigated. The erosion kinetics of isothermal and thermal cycle process was examined and analyzed with the Nernst-Brunner equation. The calculated amount of erosion in base metal by using single beam and tandem beam for preheating and brazing was compared with the experimental ; microstructural observation for the joint has shown that the amount of erosion increased with increasing the laser power. The calculated thickness of erosion was in good agreement with experimental value. It followed that the Nernst-Brunner equation seemed to be applicable to predict the erosion during laser brazing process. And the amount of erosion with tandem beam in the optimum condition was less than that with single beam brazing in spite of good wettability and spreadability against the base metal.
