Comparative study of tig and smaw root welding passes on ductile iron cast weldability

Abstract

[EN] This work compares the weldability of ductile iron when: (I) a root weld is applied with a tungsten inert gas (TIG) process using an Inconel 625 source rod and filler welds are subsequently applied using coated electrodes with 97,6 %Ni; and (II) welds on ductile iron exclusively made using the manual shielded metal arc welding technique (SMAW). Both types of welds are performed on ductile iron specimen test plates that are subjected to preheat and post-weld annealing treatments. Samples with TIG root-welding pass shown higher hardness but slightly lower ductility and strength. Both types of welding achieved better ductile and strength properties than ones found in literature.