The Analysis of CO₂ Pressure and Welding Speed Effect on in AISI 1045 MIG Welding

The chapter delves into the intricate world of Metal Inert Gas (MIG) welding, specifically examining the effects of CO2 pressure and welding speed on AISI 1045 steel. It begins by outlining the fundamental differences between Solid State Welding (SSW) and Liquid State Welding (LSW), highlighting the challenges and advantages of each. The study focuses on the MIG welding process, which uses CO2 as a shielding gas, and investigates how variations in CO2 pressure and welding speed affect the heat input and microstructure of the welded material. The research reveals that higher welding speeds result in a narrower heat-affected zone (HAZ) and increased ductility, while changes in CO2 pressure have a lesser impact on heat input. The chapter also explores the tensile properties of the welded specimens, showing how different welding parameters influence yield strength, ultimate strength, and fracture behavior. Through detailed macrostructural observations and tensile tests, the study provides valuable insights into optimizing welding parameters to enhance the mechanical properties of AISI 1045 steel. The findings underscore the importance of understanding and controlling welding variables to achieve superior weld quality and performance.