CONTRIBUTIONS TO THE PROCESS WHERE PLATING DIFUSSION FIELD ULTRASONIC WELDING PLAIN CARBON STEELS

The plating by welding of steel with a high carbon content can occur in the heat affected area a hardening of the material. In this paper we analyzed weld plating of 5 steels with high carbon content considering the heat affected zone where it can be caused a hardening of the material, thus avoiding brittle material required a series of technological measures such as: preheating, welding with high linear energy, suitable choice of materials, welding in ultrasonic field etc.. Research undertaken for several couples of materials revealed that when plating it occurs: volume diffusion; diffusion at the limits between grains; the exterior surface diffusion