Investigation of mechanical properties AISI 1040 steel welding with electric arc and MIG, applied various heat treatments

Abstract

In this study, AISI 1040 welding samples were produced by arc welding and MIG. The full annealing, normalizing, tempering and stress relief annealing treatment was applied for as-received and welded samples. Made process and untreated samples tensile, three point bending, impact and hardness tests were conducted. Tensile strain of the welded parts is higher than in the welded parts. The yield and tensile strength of the as-received and electric arc welded sample has similar value after stress relief treatment. Hard martensitic structure on the outside, inside is seen increasingly become a soft structure. Increasing in hardness was observed starting from the weld filler metal to outside.