Avaliação da técnica de correntes parasitas magnéticas na inspeção de juntas soldadas obtidas por RSEW em ligas de aço de alto desempenho

Abstract

A great need and importance of optimizing processes in terms of quality and productivity have led to an increased demand for inspection tools that make the quality control process faster and more reliable. In the field of welding, one of the greatest challenges is related to the identification of internal defects. In this context, advanced non-destructive testing techniques have gained prominence in the inspection of joints due to the geometric or metallurgical characteristics of the inspected material. Thu s, this work aims to evaluate the use of the magnetic eddy current (MEC) technique as an alternative for inspecting welded joints in thin high-performance steel sheets obtained by the resistance seam welding (RSEW) process. Magnetic eddy current tests were performed on welded specimens taken from the production process of highperformance steel coil rolling, obtained with welding parameters both in conformity and not in conformity with the production process. To assess the effectiveness of using magnetic eddy currents, hot tensile tests were conducted, the thermal cycle of the rolling process in the Gleeble thermomechanical system. The results demonstrated a correlation between the mechanical performance of the joints and the signals obtained through the MEC technique, enabling potential future application in industrial environments.