Optimization of resistance spot brazing process parameters in AHSS and AISI 304 stainless steel joint using filler metal

The aim of this research study was to determine optimal resistance spot brazing parameters for joining between AHSS and AISI 304 stainless steel by using filler metal. The key parameters investigated in this study consist of the brazing current, electrode pressure and brazing time. The Taguchi method was applied to the design of experiments. Signal-to-Noise ratio was introduced in the study to identify optimal levels from the process where input parameters yield increased shear strength. Brazing was thus implemented with 5,000 A brazing current, 0.70 MPa electrode pressure, and 1.50 s brazing time. The maximum shear strength obtained was 54.31 N·mmin accordance with input parameter settings. In addition, Cu-rich phase and AgFeintermetallic phases were found at the interface zone.