İmalat Ön Astar Kaplamanın S235JR Çeli̇ği̇ni̇n MAG ve SAW Yöntemleriyle Kaynaklanabi̇lirliği Üzeri̇ndeki̇ Etki̇sinin Karşılaştırmalı Olarak İncelenmesi̇

Abstract

The outcome of a welding process relies on various factors, one of which is the heat input at the welded joint. Consequently, the thermal conductivity of the plates to be welded holds significant importance, just like the selection of the welding technique. This research investigates the impact of applying Metal Active Gas (MAG) and Submerged Arc Welding (SAW) methods on differently coated (shop-primer) plates, as well as un-coated S235JR structural steel plates. The study explores how these applications, with varying heat inputs, affect the mechanical and microstructural properties of the materials. Filler metal of SG2/S2 non-alloy steel grade wires was employed. The variable parameters chosen included surface conditions, coating thickness, and heat input. It was observed that altering the coating thicknesses and welding methods led to welding defects. Non-destructive tests indicated that surface conditions and welding methods somewhat influenced the weld joint. Specimens with a thickness of 75 µm exhibited poor performance in tensile, impact, and bending tests. Fractography studies validated these findings.