Evaluation of mechanical properties of 500 hbw armor sheet after welding with different welding wires and preheating temperatures

Armor steels play a crucial role in providing protection against ballistic threats in various applications, including military vehicles, body armors, and structural components. Welding is a widely employed joining technique for armor steels, allowing the fabrication of complex structures with enhanced mechanical properties. However, the welding process can introduce significant changes in the microstructure and mechanical properties of the base material, necessitating a thorough understanding of the effects of welding parameters. This thesis aims to investigate the influence of preheating temperature and welding wire type on the mechanical properties of high-hardness armor (HHA) steels, specifically focusing on the HBW 500 armor plate. The study explores the relationship between preheating temperature, welding wire type, and key mechanical properties such as toughness, hardness, and tensile strength through a comprehensive experimental analysis. As a result, this study has taken significant steps in enhancing our understanding of how preheating temperature and filler wire type affect the mechanical properties of high-strength armor steel. The findings have demonstrated the importance of carefully controlling the preheating temperature and selecting an appropriate filler wire type based on the desired mechanical properties in welded armor structures. The findings from this research will contribute to the optimization of welding procedures for armor steels, enhancing their performance and reliability in demanding applications. Keywords: Armor, Mechanical Properties, Preheat, Welding, Welding wire.