Abstract:

In this study, the weldability of TBF1180 materials, which are widely used in the automotive industry and have advanced strength properties, was investigated at different welding parameters. Robotic fiber laser welding method, which is widely used in the industry, was preferred in welding processes. Tensile and Erichsen cupping test were applied to determine the mechanical properties of the samples. In addition, hardness tests and microstructure examinations were carried out on the weld zones of the samples. Microstructural examinations showed that the weld metal was predominantly martensitic in structure. In hardness tests, it has been determined that the hardness of the weld metal at many joints is generally higher than other regions and that there is a soft region in the tempered zones of the heat affected zone (HAZ). As a result of the tensile tests, it was seen that the fractures occurred from the base material with lower strength. It was observed that no tearing occurred in the Erichsen cupping test.