Preheating effect of TIG/MIG hybride welding on 1050 carbon steel's welding

1050 steels are non-alloy steels and are known as carbon steels due to the high amount of carbon content. The hardenability increases direct proportionally with the carbon content they contain, while their toughness is inversely proportional to the amount of carbon. 1050 steels require pre-annealing to weld due to their high carbon equivalence. Carbon content of the carbon steel in the source of the material causes the hardening of a certain amount of carbon content because it does not cause problems in the source of high carbon and carbon effect alloying hardening of the weld zone and leads to a reduction in the impact toughnes. Reducing the cooling rate in materials with high carbon equivalents is the only way to prevent hard micro structures. 1050 steels are used in industry due to their high yield strength and hardness. Approximately 150-200 C pre-annealing is preferred for welding to prevent hard micro structure. The pre-annealing of large-sized materials creates a disadvantage in terms of both the processing time and the heating costs. In this study, TIG and MIG welding are used together with the hybrid welding method for 1050 steel which requires pre annealing during welding and will be examined if the heat source of the TIG is heated by a heat input and a preliminary annealing in the welding zone.