Akademik Veri Yönetim Sistemi
TThe International Conference of Materials and Engineering Technology, Gaziantep, Türkiye, 6 - 09 Ekim 2025, ss.332-340, (Tam Metin Bildiri)
This study investigates the effects of welding Miilux Protection 600 armor steel with ER 110 SG and ER 307Si filler wires, along with the subsequent application of stress relief annealing and quenching–tempering heat treatments, on the mechanical properties of the joints. The experimental data were comparatively analyzed to evaluate the influence of these parameters. In the experimental program, 10 mm thick Miilux Protection 600 armor steel plates were welded by the gas metal arc welding (MIG) process using ER 110 SG and ER 307Si filler wires. Following welding, some specimens were subjected to stress relief annealing, while others underwent quenching and tempering.The joints were evaluated by both non-destructive and destructive testing methods. Liquid penetrant and ultrasonic inspections were carried out for defect detection, while hardness measurements, tensile testing, Charpy V-notch impact tests, and microstructural examinations were conducted to determine mechanical performance.The results showed that the low carbon content of ER 110 SG and ER 307Si weld metals prevented significant hardness improvement after post-weld heat treatment. Without sufficient carbon, the martensitic transformation required for hardness enhancement could not be achieved. Consequently, stress relief annealing and quenching–tempering treatments applied to these low-carbon weld metals did not improve the mechanical properties in a meaningful way.