Özet:

Ferritic and austenitic stainless steels are used together in many industrial areas. in this case has makes it necessary to join these two types of stainless steel. When the studies carried out to date are examined, it is seen that generally focused on parameters such as welding current, welding speed, etc., there are very few studies investigating the effect of welding wire on joints. There fore in this study, AISI 304 austenitic stainless steel and AISI 430 ferritic stainless steel were joined with GMAW welding method at different welding speeds in order to examine the effects of weld additional wire on the mechanical and microstructure of the joint. While microstructure studies were carried out to determine the macro and microstructural properties of the welded joint, hardness and tensile tests were applied to determine its mechanical properties. As a result of the studies, it has been observed that the microstructure of the weld metal consists of martensite + austenite + ferrite. In the hardness measurement results, it was determined that the hardest region was the weld metal, while the hardness measurements of the samples joined with 308L welding wire were higher than the samples joined with 309LSi welding wire. The tensile strength of all welded joints produced was higher than the AISI 430 base material, as the welding wires add strength-enhancing elements such as Mn and Cr to the weld metal.