Effect of Cutting Parameters on Grain Size and Surface Corrosion Resistance of S32760 Duplex Stainless Steel

The exceptional characteristics of S32760 stainless steel make it a preferred choice for marine construction projects. Microstructure evolution is a critical factor affecting material corrosion resistance. Cutting parameters directly influence the microstructure of machined surfaces. This study investigates the effects of cutting parameters and rake angle on the grain size of S32760 duplex stainless steel surfaces. We also examine how grain size impacts surface corrosion resistance. Using electron backscatter diffraction (EBSD) technology and scanning electron microscope (SEM), we establish a correlation between cutting parameters and two-phase grain size. Electrochemical characterization in 3.5 wt% sodium chloride solution evaluates localized corrosion progression, simulating a marine environment. The study examined the connection between processing conditions and the protective capacity of metal surfaces against corrosive elements. Study findings indicate that optimizing grain structure during manufacturing enhances the alloy’s ability to resist surface corrosion. Under optimal processing parameters (cutting speed: 300 m/min, feed rate: 0.08 mm/r, and rake angle: 0°), signifying superior surface corrosion resistance.