Study Experimental Joining Dissimilar Metal of Cemented Carbide and Carbon Steel under TIG Brazing

In the manufacturing industry, cutting tools are the main component. To produce the best performance of the cutting tool is required high cost. The cemented carbide and steels are joined using brazing. The aim of the work is to investigate the joining of dissimilar metals between cemented carbide and carbon steel using arc brazing. The TIG brazing method has been prepared for the joining of carbide insert and carbon steel. Phenomena that occur in the joint were observed using a scanning electron microscope (SEM). The composition of the constituent elements of the brazed area was characterized by energy dispersive spectroscopy (EDS). Vickers hardness machine is used to hardness test in the brazed area. The results of the microstructure analysis and EDS test composition indicate that solid solution phase enriched Cu is detected in the brazed area. The Fe and C elements are diffusions into the brazed area. The hardness value in the brazed area is 12,16 HVN, greater than based metals especially SS400. Thus, the solid solution phase of Cu and elements of Fe and C affect the hardness value.