Effect of Cold‐Drawn Process and Postdrawing Annealing on Mechanical Properties and Corrosion Resistance of 2507 Duplex Stainless Steel Wire

This study systematically investigates the effects of drawing processes and subsequent high‐temperature annealing on the mechanical and anticorrosion performance of 2507 duplex stainless steel through microstructural characterization and relevant testing. The results indicate that yield strength and ultimate tensile strength significantly increase with drawing strain, while uniform elongation decreases. The combined effects of grain refinement and reduced high‐angle grain boundary density improve corrosion resistance. After annealing at 1050–1100 °C for 1 h, the absence of precipitation phases contributes to acquiring a good combination of mechanical properties and pitting corrosion resistance via enhancing stability of the passivation film. This research provides theoretical guidance for optimizing the synergistic strengthening process of drawing and heat treatment in duplex stainless steel to meet increasingly demanding service conditions. Furthermore, it presents this synergistic strengthening approach and discusses the relevant mechanisms.